Merge "Factor inverse transform functions into vpx_dsp"

32 files changed, 6928 insertions, 6849 deletions

diff --git a/test/idct8x8_test.cc b/test/idct8x8_test.cc
index f488cb4af..1a1a2344e 100644
--- a/test/idct8x8_test.cc
+++ b/test/idct8x8_test.cc
@@ -14,8 +14,7 @@
 
 #include "third_party/googletest/src/include/gtest/gtest.h"
 
-#include "./vp9_rtcd.h"
-
+#include "./vpx_dsp_rtcd.h"
 #include "test/acm_random.h"
 #include "vpx/vpx_integer.h"
 
diff --git a/vp9/common/vp9_idct.c b/vp9/common/vp9_idct.c
index 174b96e21..b15f7f370 100644
--- a/vp9/common/vp9_idct.c
+++ b/vp9/common/vp9_idct.c
@@ -11,283 +11,20 @@
 #include <math.h>
 
 #include "./vp9_rtcd.h"
-#include "vpx_ports/mem.h"
+#include "./vpx_dsp_rtcd.h"
 #include "vp9/common/vp9_blockd.h"
 #include "vp9/common/vp9_idct.h"
 #include "vp9/common/vp9_systemdependent.h"
-
-static INLINE uint8_t clip_pixel_add(uint8_t dest, tran_high_t trans) {
-  trans = WRAPLOW(trans, 8);
-  return clip_pixel(WRAPLOW(dest + trans, 8));
-}
-
-void vp9_iwht4x4_16_add_c(const tran_low_t *input, uint8_t *dest, int stride) {
-/* 4-point reversible, orthonormal inverse Walsh-Hadamard in 3.5 adds,
-   0.5 shifts per pixel. */
-  int i;
-  tran_low_t output[16];
-  tran_high_t a1, b1, c1, d1, e1;
-  const tran_low_t *ip = input;
-  tran_low_t *op = output;
-
-  for (i = 0; i < 4; i++) {
-    a1 = ip[0] >> UNIT_QUANT_SHIFT;
-    c1 = ip[1] >> UNIT_QUANT_SHIFT;
-    d1 = ip[2] >> UNIT_QUANT_SHIFT;
-    b1 = ip[3] >> UNIT_QUANT_SHIFT;
-    a1 += c1;
-    d1 -= b1;
-    e1 = (a1 - d1) >> 1;
-    b1 = e1 - b1;
-    c1 = e1 - c1;
-    a1 -= b1;
-    d1 += c1;
-    op[0] = WRAPLOW(a1, 8);
-    op[1] = WRAPLOW(b1, 8);
-    op[2] = WRAPLOW(c1, 8);
-    op[3] = WRAPLOW(d1, 8);
-    ip += 4;
-    op += 4;
-  }
-
-  ip = output;
-  for (i = 0; i < 4; i++) {
-    a1 = ip[4 * 0];
-    c1 = ip[4 * 1];
-    d1 = ip[4 * 2];
-    b1 = ip[4 * 3];
-    a1 += c1;
-    d1 -= b1;
-    e1 = (a1 - d1) >> 1;
-    b1 = e1 - b1;
-    c1 = e1 - c1;
-    a1 -= b1;
-    d1 += c1;
-    dest[stride * 0] = clip_pixel_add(dest[stride * 0], a1);
-    dest[stride * 1] = clip_pixel_add(dest[stride * 1], b1);
-    dest[stride * 2] = clip_pixel_add(dest[stride * 2], c1);
-    dest[stride * 3] = clip_pixel_add(dest[stride * 3], d1);
-
-    ip++;
-    dest++;
-  }
-}
-
-void vp9_iwht4x4_1_add_c(const tran_low_t *in, uint8_t *dest, int dest_stride) {
-  int i;
-  tran_high_t a1, e1;
-  tran_low_t tmp[4];
-  const tran_low_t *ip = in;
-  tran_low_t *op = tmp;
-
-  a1 = ip[0] >> UNIT_QUANT_SHIFT;
-  e1 = a1 >> 1;
-  a1 -= e1;
-  op[0] = WRAPLOW(a1, 8);
-  op[1] = op[2] = op[3] = WRAPLOW(e1, 8);
-
-  ip = tmp;
-  for (i = 0; i < 4; i++) {
-    e1 = ip[0] >> 1;
-    a1 = ip[0] - e1;
-    dest[dest_stride * 0] = clip_pixel_add(dest[dest_stride * 0], a1);
-    dest[dest_stride * 1] = clip_pixel_add(dest[dest_stride * 1], e1);
-    dest[dest_stride * 2] = clip_pixel_add(dest[dest_stride * 2], e1);
-    dest[dest_stride * 3] = clip_pixel_add(dest[dest_stride * 3], e1);
-    ip++;
-    dest++;
-  }
-}
-
-static void idct4(const tran_low_t *input, tran_low_t *output) {
-  tran_low_t step[4];
-  tran_high_t temp1, temp2;
-  // stage 1
-  temp1 = (input[0] + input[2]) * cospi_16_64;
-  temp2 = (input[0] - input[2]) * cospi_16_64;
-  step[0] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step[1] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  temp1 = input[1] * cospi_24_64 - input[3] * cospi_8_64;
-  temp2 = input[1] * cospi_8_64 + input[3] * cospi_24_64;
-  step[2] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step[3] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  // stage 2
-  output[0] = WRAPLOW(step[0] + step[3], 8);
-  output[1] = WRAPLOW(step[1] + step[2], 8);
-  output[2] = WRAPLOW(step[1] - step[2], 8);
-  output[3] = WRAPLOW(step[0] - step[3], 8);
-}
-
-void vp9_idct4x4_16_add_c(const tran_low_t *input, uint8_t *dest, int stride) {
-  tran_low_t out[4 * 4];
-  tran_low_t *outptr = out;
-  int i, j;
-  tran_low_t temp_in[4], temp_out[4];
-
-  // Rows
-  for (i = 0; i < 4; ++i) {
-    idct4(input, outptr);
-    input += 4;
-    outptr += 4;
-  }
-
-  // Columns
-  for (i = 0; i < 4; ++i) {
-    for (j = 0; j < 4; ++j)
-      temp_in[j] = out[j * 4 + i];
-    idct4(temp_in, temp_out);
-    for (j = 0; j < 4; ++j) {
-      dest[j * stride + i] = clip_pixel_add(dest[j * stride + i],
-                                            ROUND_POWER_OF_TWO(temp_out[j], 4));
-    }
-  }
-}
-
-void vp9_idct4x4_1_add_c(const tran_low_t *input, uint8_t *dest,
-                         int dest_stride) {
-  int i;
-  tran_high_t a1;
-  tran_low_t out = WRAPLOW(dct_const_round_shift(input[0] * cospi_16_64), 8);
-  out = WRAPLOW(dct_const_round_shift(out * cospi_16_64), 8);
-  a1 = ROUND_POWER_OF_TWO(out, 4);
-
-  for (i = 0; i < 4; i++) {
-    dest[0] = clip_pixel_add(dest[0], a1);
-    dest[1] = clip_pixel_add(dest[1], a1);
-    dest[2] = clip_pixel_add(dest[2], a1);
-    dest[3] = clip_pixel_add(dest[3], a1);
-    dest += dest_stride;
-  }
-}
-
-static void idct8(const tran_low_t *input, tran_low_t *output) {
-  tran_low_t step1[8], step2[8];
-  tran_high_t temp1, temp2;
-  // stage 1
-  step1[0] = input[0];
-  step1[2] = input[4];
-  step1[1] = input[2];
-  step1[3] = input[6];
-  temp1 = input[1] * cospi_28_64 - input[7] * cospi_4_64;
-  temp2 = input[1] * cospi_4_64 + input[7] * cospi_28_64;
-  step1[4] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[7] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  temp1 = input[5] * cospi_12_64 - input[3] * cospi_20_64;
-  temp2 = input[5] * cospi_20_64 + input[3] * cospi_12_64;
-  step1[5] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[6] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  // stage 2 & stage 3 - even half
-  idct4(step1, step1);
-
-  // stage 2 - odd half
-  step2[4] = WRAPLOW(step1[4] + step1[5], 8);
-  step2[5] = WRAPLOW(step1[4] - step1[5], 8);
-  step2[6] = WRAPLOW(-step1[6] + step1[7], 8);
-  step2[7] = WRAPLOW(step1[6] + step1[7], 8);
-
-  // stage 3 -odd half
-  step1[4] = step2[4];
-  temp1 = (step2[6] - step2[5]) * cospi_16_64;
-  temp2 = (step2[5] + step2[6]) * cospi_16_64;
-  step1[5] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[6] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  step1[7] = step2[7];
-
-  // stage 4
-  output[0] = WRAPLOW(step1[0] + step1[7], 8);
-  output[1] = WRAPLOW(step1[1] + step1[6], 8);
-  output[2] = WRAPLOW(step1[2] + step1[5], 8);
-  output[3] = WRAPLOW(step1[3] + step1[4], 8);
-  output[4] = WRAPLOW(step1[3] - step1[4], 8);
-  output[5] = WRAPLOW(step1[2] - step1[5], 8);
-  output[6] = WRAPLOW(step1[1] - step1[6], 8);
-  output[7] = WRAPLOW(step1[0] - step1[7], 8);
-}
-
-void vp9_idct8x8_64_add_c(const tran_low_t *input, uint8_t *dest, int stride) {
-  tran_low_t out[8 * 8];
-  tran_low_t *outptr = out;
-  int i, j;
-  tran_low_t temp_in[8], temp_out[8];
-
-  // First transform rows
-  for (i = 0; i < 8; ++i) {
-    idct8(input, outptr);
-    input += 8;
-    outptr += 8;
-  }
-
-  // Then transform columns
-  for (i = 0; i < 8; ++i) {
-    for (j = 0; j < 8; ++j)
-      temp_in[j] = out[j * 8 + i];
-    idct8(temp_in, temp_out);
-    for (j = 0; j < 8; ++j) {
-      dest[j * stride + i] = clip_pixel_add(dest[j * stride + i],
-                                            ROUND_POWER_OF_TWO(temp_out[j], 5));
-    }
-  }
-}
-
-void vp9_idct8x8_1_add_c(const tran_low_t *input, uint8_t *dest, int stride) {
-  int i, j;
-  tran_high_t a1;
-  tran_low_t out = WRAPLOW(dct_const_round_shift(input[0] * cospi_16_64), 8);
-  out = WRAPLOW(dct_const_round_shift(out * cospi_16_64), 8);
-  a1 = ROUND_POWER_OF_TWO(out, 5);
-  for (j = 0; j < 8; ++j) {
-    for (i = 0; i < 8; ++i)
-      dest[i] = clip_pixel_add(dest[i], a1);
-    dest += stride;
-  }
-}
-
-static void iadst4(const tran_low_t *input, tran_low_t *output) {
-  tran_high_t s0, s1, s2, s3, s4, s5, s6, s7;
-
-  tran_low_t x0 = input[0];
-  tran_low_t x1 = input[1];
-  tran_low_t x2 = input[2];
-  tran_low_t x3 = input[3];
-
-  if (!(x0 | x1 | x2 | x3)) {
-    output[0] = output[1] = output[2] = output[3] = 0;
-    return;
-  }
-
-  s0 = sinpi_1_9 * x0;
-  s1 = sinpi_2_9 * x0;
-  s2 = sinpi_3_9 * x1;
-  s3 = sinpi_4_9 * x2;
-  s4 = sinpi_1_9 * x2;
-  s5 = sinpi_2_9 * x3;
-  s6 = sinpi_4_9 * x3;
-  s7 = x0 - x2 + x3;
-
-  s0 = s0 + s3 + s5;
-  s1 = s1 - s4 - s6;
-  s3 = s2;
-  s2 = sinpi_3_9 * s7;
-
-  // 1-D transform scaling factor is sqrt(2).
-  // The overall dynamic range is 14b (input) + 14b (multiplication scaling)
-  // + 1b (addition) = 29b.
-  // Hence the output bit depth is 15b.
-  output[0] = WRAPLOW(dct_const_round_shift(s0 + s3), 8);
-  output[1] = WRAPLOW(dct_const_round_shift(s1 + s3), 8);
-  output[2] = WRAPLOW(dct_const_round_shift(s2), 8);
-  output[3] = WRAPLOW(dct_const_round_shift(s0 + s1 - s3), 8);
-}
+#include "vpx_dsp/inv_txfm.h"
+#include "vpx_ports/mem.h"
 
 void vp9_iht4x4_16_add_c(const tran_low_t *input, uint8_t *dest, int stride,
                          int tx_type) {
   const transform_2d IHT_4[] = {
-    { idct4, idct4  },  // DCT_DCT  = 0
-    { iadst4, idct4  },   // ADST_DCT = 1
-    { idct4, iadst4 },    // DCT_ADST = 2
-    { iadst4, iadst4 }      // ADST_ADST = 3
+    { idct4_c, idct4_c  },  // DCT_DCT  = 0
+    { iadst4_c, idct4_c  },   // ADST_DCT = 1
+    { idct4_c, iadst4_c },    // DCT_ADST = 2
+    { iadst4_c, iadst4_c }      // ADST_ADST = 3
   };
 
   int i, j;
@@ -314,88 +51,11 @@ void vp9_iht4x4_16_add_c(const tran_low_t *input, uint8_t *dest, int stride,
   }
 }
 
-static void iadst8(const tran_low_t *input, tran_low_t *output) {
-  int s0, s1, s2, s3, s4, s5, s6, s7;
-
-  tran_high_t x0 = input[7];
-  tran_high_t x1 = input[0];
-  tran_high_t x2 = input[5];
-  tran_high_t x3 = input[2];
-  tran_high_t x4 = input[3];
-  tran_high_t x5 = input[4];
-  tran_high_t x6 = input[1];
-  tran_high_t x7 = input[6];
-
-  if (!(x0 | x1 | x2 | x3 | x4 | x5 | x6 | x7)) {
-    output[0] = output[1] = output[2] = output[3] = output[4]
-              = output[5] = output[6] = output[7] = 0;
-    return;
-  }
-
-  // stage 1
-  s0 = (int)(cospi_2_64  * x0 + cospi_30_64 * x1);
-  s1 = (int)(cospi_30_64 * x0 - cospi_2_64  * x1);
-  s2 = (int)(cospi_10_64 * x2 + cospi_22_64 * x3);
-  s3 = (int)(cospi_22_64 * x2 - cospi_10_64 * x3);
-  s4 = (int)(cospi_18_64 * x4 + cospi_14_64 * x5);
-  s5 = (int)(cospi_14_64 * x4 - cospi_18_64 * x5);
-  s6 = (int)(cospi_26_64 * x6 + cospi_6_64  * x7);
-  s7 = (int)(cospi_6_64  * x6 - cospi_26_64 * x7);
-
-  x0 = WRAPLOW(dct_const_round_shift(s0 + s4), 8);
-  x1 = WRAPLOW(dct_const_round_shift(s1 + s5), 8);
-  x2 = WRAPLOW(dct_const_round_shift(s2 + s6), 8);
-  x3 = WRAPLOW(dct_const_round_shift(s3 + s7), 8);
-  x4 = WRAPLOW(dct_const_round_shift(s0 - s4), 8);
-  x5 = WRAPLOW(dct_const_round_shift(s1 - s5), 8);
-  x6 = WRAPLOW(dct_const_round_shift(s2 - s6), 8);
-  x7 = WRAPLOW(dct_const_round_shift(s3 - s7), 8);
-
-  // stage 2
-  s0 = (int)x0;
-  s1 = (int)x1;
-  s2 = (int)x2;
-  s3 = (int)x3;
-  s4 = (int)(cospi_8_64 * x4 + cospi_24_64 * x5);
-  s5 = (int)(cospi_24_64 * x4 - cospi_8_64 * x5);
-  s6 = (int)(-cospi_24_64 * x6 + cospi_8_64 * x7);
-  s7 = (int)(cospi_8_64 * x6 + cospi_24_64 * x7);
-
-  x0 = WRAPLOW(s0 + s2, 8);
-  x1 = WRAPLOW(s1 + s3, 8);
-  x2 = WRAPLOW(s0 - s2, 8);
-  x3 = WRAPLOW(s1 - s3, 8);
-  x4 = WRAPLOW(dct_const_round_shift(s4 + s6), 8);
-  x5 = WRAPLOW(dct_const_round_shift(s5 + s7), 8);
-  x6 = WRAPLOW(dct_const_round_shift(s4 - s6), 8);
-  x7 = WRAPLOW(dct_const_round_shift(s5 - s7), 8);
-
-  // stage 3
-  s2 = (int)(cospi_16_64 * (x2 + x3));
-  s3 = (int)(cospi_16_64 * (x2 - x3));
-  s6 = (int)(cospi_16_64 * (x6 + x7));
-  s7 = (int)(cospi_16_64 * (x6 - x7));
-
-  x2 = WRAPLOW(dct_const_round_shift(s2), 8);
-  x3 = WRAPLOW(dct_const_round_shift(s3), 8);
-  x6 = WRAPLOW(dct_const_round_shift(s6), 8);
-  x7 = WRAPLOW(dct_const_round_shift(s7), 8);
-
-  output[0] = WRAPLOW(x0, 8);
-  output[1] = WRAPLOW(-x4, 8);
-  output[2] = WRAPLOW(x6, 8);
-  output[3] = WRAPLOW(-x2, 8);
-  output[4] = WRAPLOW(x3, 8);
-  output[5] = WRAPLOW(-x7, 8);
-  output[6] = WRAPLOW(x5, 8);
-  output[7] = WRAPLOW(-x1, 8);
-}
-
 static const transform_2d IHT_8[] = {
-  { idct8,  idct8  },  // DCT_DCT  = 0
-  { iadst8, idct8  },  // ADST_DCT = 1
-  { idct8,  iadst8 },  // DCT_ADST = 2
-  { iadst8, iadst8 }   // ADST_ADST = 3
+  { idct8_c,  idct8_c  },  // DCT_DCT  = 0
+  { iadst8_c, idct8_c  },  // ADST_DCT = 1
+  { idct8_c,  iadst8_c },  // DCT_ADST = 2
+  { iadst8_c, iadst8_c }   // ADST_ADST = 3
 };
 
 void vp9_iht8x8_64_add_c(const tran_low_t *input, uint8_t *dest, int stride,
@@ -425,400 +85,11 @@ void vp9_iht8x8_64_add_c(const tran_low_t *input, uint8_t *dest, int stride,
   }
 }
 
-void vp9_idct8x8_12_add_c(const tran_low_t *input, uint8_t *dest, int stride) {
-  tran_low_t out[8 * 8] = { 0 };
-  tran_low_t *outptr = out;
-  int i, j;
-  tran_low_t temp_in[8], temp_out[8];
-
-  // First transform rows
-  // only first 4 row has non-zero coefs
-  for (i = 0; i < 4; ++i) {
-    idct8(input, outptr);
-    input += 8;
-    outptr += 8;
-  }
-
-  // Then transform columns
-  for (i = 0; i < 8; ++i) {
-    for (j = 0; j < 8; ++j)
-      temp_in[j] = out[j * 8 + i];
-    idct8(temp_in, temp_out);
-    for (j = 0; j < 8; ++j) {
-      dest[j * stride + i] = clip_pixel_add(dest[j * stride + i],
-                                            ROUND_POWER_OF_TWO(temp_out[j], 5));
-    }
-  }
-}
-
-static void idct16(const tran_low_t *input, tran_low_t *output) {
-  tran_low_t step1[16], step2[16];
-  tran_high_t temp1, temp2;
-
-  // stage 1
-  step1[0] = input[0/2];
-  step1[1] = input[16/2];
-  step1[2] = input[8/2];
-  step1[3] = input[24/2];
-  step1[4] = input[4/2];
-  step1[5] = input[20/2];
-  step1[6] = input[12/2];
-  step1[7] = input[28/2];
-  step1[8] = input[2/2];
-  step1[9] = input[18/2];
-  step1[10] = input[10/2];
-  step1[11] = input[26/2];
-  step1[12] = input[6/2];
-  step1[13] = input[22/2];
-  step1[14] = input[14/2];
-  step1[15] = input[30/2];
-
-  // stage 2
-  step2[0] = step1[0];
-  step2[1] = step1[1];
-  step2[2] = step1[2];
-  step2[3] = step1[3];
-  step2[4] = step1[4];
-  step2[5] = step1[5];
-  step2[6] = step1[6];
-  step2[7] = step1[7];
-
-  temp1 = step1[8] * cospi_30_64 - step1[15] * cospi_2_64;
-  temp2 = step1[8] * cospi_2_64 + step1[15] * cospi_30_64;
-  step2[8] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[15] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  temp1 = step1[9] * cospi_14_64 - step1[14] * cospi_18_64;
-  temp2 = step1[9] * cospi_18_64 + step1[14] * cospi_14_64;
-  step2[9] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[14] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  temp1 = step1[10] * cospi_22_64 - step1[13] * cospi_10_64;
-  temp2 = step1[10] * cospi_10_64 + step1[13] * cospi_22_64;
-  step2[10] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[13] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  temp1 = step1[11] * cospi_6_64 - step1[12] * cospi_26_64;
-  temp2 = step1[11] * cospi_26_64 + step1[12] * cospi_6_64;
-  step2[11] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[12] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  // stage 3
-  step1[0] = step2[0];
-  step1[1] = step2[1];
-  step1[2] = step2[2];
-  step1[3] = step2[3];
-
-  temp1 = step2[4] * cospi_28_64 - step2[7] * cospi_4_64;
-  temp2 = step2[4] * cospi_4_64 + step2[7] * cospi_28_64;
-  step1[4] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[7] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  temp1 = step2[5] * cospi_12_64 - step2[6] * cospi_20_64;
-  temp2 = step2[5] * cospi_20_64 + step2[6] * cospi_12_64;
-  step1[5] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[6] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  step1[8] = WRAPLOW(step2[8] + step2[9], 8);
-  step1[9] = WRAPLOW(step2[8] - step2[9], 8);
-  step1[10] = WRAPLOW(-step2[10] + step2[11], 8);
-  step1[11] = WRAPLOW(step2[10] + step2[11], 8);
-  step1[12] = WRAPLOW(step2[12] + step2[13], 8);
-  step1[13] = WRAPLOW(step2[12] - step2[13], 8);
-  step1[14] = WRAPLOW(-step2[14] + step2[15], 8);
-  step1[15] = WRAPLOW(step2[14] + step2[15], 8);
-
-  // stage 4
-  temp1 = (step1[0] + step1[1]) * cospi_16_64;
-  temp2 = (step1[0] - step1[1]) * cospi_16_64;
-  step2[0] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[1] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  temp1 = step1[2] * cospi_24_64 - step1[3] * cospi_8_64;
-  temp2 = step1[2] * cospi_8_64 + step1[3] * cospi_24_64;
-  step2[2] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[3] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  step2[4] = WRAPLOW(step1[4] + step1[5], 8);
-  step2[5] = WRAPLOW(step1[4] - step1[5], 8);
-  step2[6] = WRAPLOW(-step1[6] + step1[7], 8);
-  step2[7] = WRAPLOW(step1[6] + step1[7], 8);
-
-  step2[8] = step1[8];
-  step2[15] = step1[15];
-  temp1 = -step1[9] * cospi_8_64 + step1[14] * cospi_24_64;
-  temp2 = step1[9] * cospi_24_64 + step1[14] * cospi_8_64;
-  step2[9] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[14] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  temp1 = -step1[10] * cospi_24_64 - step1[13] * cospi_8_64;
-  temp2 = -step1[10] * cospi_8_64 + step1[13] * cospi_24_64;
-  step2[10] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[13] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  step2[11] = step1[11];
-  step2[12] = step1[12];
-
-  // stage 5
-  step1[0] = WRAPLOW(step2[0] + step2[3], 8);
-  step1[1] = WRAPLOW(step2[1] + step2[2], 8);
-  step1[2] = WRAPLOW(step2[1] - step2[2], 8);
-  step1[3] = WRAPLOW(step2[0] - step2[3], 8);
-  step1[4] = step2[4];
-  temp1 = (step2[6] - step2[5]) * cospi_16_64;
-  temp2 = (step2[5] + step2[6]) * cospi_16_64;
-  step1[5] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[6] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  step1[7] = step2[7];
-
-  step1[8] = WRAPLOW(step2[8] + step2[11], 8);
-  step1[9] = WRAPLOW(step2[9] + step2[10], 8);
-  step1[10] = WRAPLOW(step2[9] - step2[10], 8);
-  step1[11] = WRAPLOW(step2[8] - step2[11], 8);
-  step1[12] = WRAPLOW(-step2[12] + step2[15], 8);
-  step1[13] = WRAPLOW(-step2[13] + step2[14], 8);
-  step1[14] = WRAPLOW(step2[13] + step2[14], 8);
-  step1[15] = WRAPLOW(step2[12] + step2[15], 8);
-
-  // stage 6
-  step2[0] = WRAPLOW(step1[0] + step1[7], 8);
-  step2[1] = WRAPLOW(step1[1] + step1[6], 8);
-  step2[2] = WRAPLOW(step1[2] + step1[5], 8);
-  step2[3] = WRAPLOW(step1[3] + step1[4], 8);
-  step2[4] = WRAPLOW(step1[3] - step1[4], 8);
-  step2[5] = WRAPLOW(step1[2] - step1[5], 8);
-  step2[6] = WRAPLOW(step1[1] - step1[6], 8);
-  step2[7] = WRAPLOW(step1[0] - step1[7], 8);
-  step2[8] = step1[8];
-  step2[9] = step1[9];
-  temp1 = (-step1[10] + step1[13]) * cospi_16_64;
-  temp2 = (step1[10] + step1[13]) * cospi_16_64;
-  step2[10] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[13] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  temp1 = (-step1[11] + step1[12]) * cospi_16_64;
-  temp2 = (step1[11] + step1[12]) * cospi_16_64;
-  step2[11] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[12] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  step2[14] = step1[14];
-  step2[15] = step1[15];
-
-  // stage 7
-  output[0] = WRAPLOW(step2[0] + step2[15], 8);
-  output[1] = WRAPLOW(step2[1] + step2[14], 8);
-  output[2] = WRAPLOW(step2[2] + step2[13], 8);
-  output[3] = WRAPLOW(step2[3] + step2[12], 8);
-  output[4] = WRAPLOW(step2[4] + step2[11], 8);
-  output[5] = WRAPLOW(step2[5] + step2[10], 8);
-  output[6] = WRAPLOW(step2[6] + step2[9], 8);
-  output[7] = WRAPLOW(step2[7] + step2[8], 8);
-  output[8] = WRAPLOW(step2[7] - step2[8], 8);
-  output[9] = WRAPLOW(step2[6] - step2[9], 8);
-  output[10] = WRAPLOW(step2[5] - step2[10], 8);
-  output[11] = WRAPLOW(step2[4] - step2[11], 8);
-  output[12] = WRAPLOW(step2[3] - step2[12], 8);
-  output[13] = WRAPLOW(step2[2] - step2[13], 8);
-  output[14] = WRAPLOW(step2[1] - step2[14], 8);
-  output[15] = WRAPLOW(step2[0] - step2[15], 8);
-}
-
-void vp9_idct16x16_256_add_c(const tran_low_t *input, uint8_t *dest,
-                             int stride) {
-  tran_low_t out[16 * 16];
-  tran_low_t *outptr = out;
-  int i, j;
-  tran_low_t temp_in[16], temp_out[16];
-
-  // First transform rows
-  for (i = 0; i < 16; ++i) {
-    idct16(input, outptr);
-    input += 16;
-    outptr += 16;
-  }
-
-  // Then transform columns
-  for (i = 0; i < 16; ++i) {
-    for (j = 0; j < 16; ++j)
-      temp_in[j] = out[j * 16 + i];
-    idct16(temp_in, temp_out);
-    for (j = 0; j < 16; ++j) {
-      dest[j * stride + i] = clip_pixel_add(dest[j * stride + i],
-                                            ROUND_POWER_OF_TWO(temp_out[j], 6));
-    }
-  }
-}
-
-static void iadst16(const tran_low_t *input, tran_low_t *output) {
-  tran_high_t s0, s1, s2, s3, s4, s5, s6, s7, s8;
-  tran_high_t s9, s10, s11, s12, s13, s14, s15;
-
-  tran_high_t x0 = input[15];
-  tran_high_t x1 = input[0];
-  tran_high_t x2 = input[13];
-  tran_high_t x3 = input[2];
-  tran_high_t x4 = input[11];
-  tran_high_t x5 = input[4];
-  tran_high_t x6 = input[9];
-  tran_high_t x7 = input[6];
-  tran_high_t x8 = input[7];
-  tran_high_t x9 = input[8];
-  tran_high_t x10 = input[5];
-  tran_high_t x11 = input[10];
-  tran_high_t x12 = input[3];
-  tran_high_t x13 = input[12];
-  tran_high_t x14 = input[1];
-  tran_high_t x15 = input[14];
-
-  if (!(x0 | x1 | x2 | x3 | x4 | x5 | x6 | x7 | x8
-           | x9 | x10 | x11 | x12 | x13 | x14 | x15)) {
-    output[0] = output[1] = output[2] = output[3] = output[4]
-              = output[5] = output[6] = output[7] = output[8]
-              = output[9] = output[10] = output[11] = output[12]
-              = output[13] = output[14] = output[15] = 0;
-    return;
-  }
-
-  // stage 1
-  s0 = x0 * cospi_1_64  + x1 * cospi_31_64;
-  s1 = x0 * cospi_31_64 - x1 * cospi_1_64;
-  s2 = x2 * cospi_5_64  + x3 * cospi_27_64;
-  s3 = x2 * cospi_27_64 - x3 * cospi_5_64;
-  s4 = x4 * cospi_9_64  + x5 * cospi_23_64;
-  s5 = x4 * cospi_23_64 - x5 * cospi_9_64;
-  s6 = x6 * cospi_13_64 + x7 * cospi_19_64;
-  s7 = x6 * cospi_19_64 - x7 * cospi_13_64;
-  s8 = x8 * cospi_17_64 + x9 * cospi_15_64;
-  s9 = x8 * cospi_15_64 - x9 * cospi_17_64;
-  s10 = x10 * cospi_21_64 + x11 * cospi_11_64;
-  s11 = x10 * cospi_11_64 - x11 * cospi_21_64;
-  s12 = x12 * cospi_25_64 + x13 * cospi_7_64;
-  s13 = x12 * cospi_7_64  - x13 * cospi_25_64;
-  s14 = x14 * cospi_29_64 + x15 * cospi_3_64;
-  s15 = x14 * cospi_3_64  - x15 * cospi_29_64;
-
-  x0 = WRAPLOW(dct_const_round_shift(s0 + s8), 8);
-  x1 = WRAPLOW(dct_const_round_shift(s1 + s9), 8);
-  x2 = WRAPLOW(dct_const_round_shift(s2 + s10), 8);
-  x3 = WRAPLOW(dct_const_round_shift(s3 + s11), 8);
-  x4 = WRAPLOW(dct_const_round_shift(s4 + s12), 8);
-  x5 = WRAPLOW(dct_const_round_shift(s5 + s13), 8);
-  x6 = WRAPLOW(dct_const_round_shift(s6 + s14), 8);
-  x7 = WRAPLOW(dct_const_round_shift(s7 + s15), 8);
-  x8 = WRAPLOW(dct_const_round_shift(s0 - s8), 8);
-  x9 = WRAPLOW(dct_const_round_shift(s1 - s9), 8);
-  x10 = WRAPLOW(dct_const_round_shift(s2 - s10), 8);
-  x11 = WRAPLOW(dct_const_round_shift(s3 - s11), 8);
-  x12 = WRAPLOW(dct_const_round_shift(s4 - s12), 8);
-  x13 = WRAPLOW(dct_const_round_shift(s5 - s13), 8);
-  x14 = WRAPLOW(dct_const_round_shift(s6 - s14), 8);
-  x15 = WRAPLOW(dct_const_round_shift(s7 - s15), 8);
-
-  // stage 2
-  s0 = x0;
-  s1 = x1;
-  s2 = x2;
-  s3 = x3;
-  s4 = x4;
-  s5 = x5;
-  s6 = x6;
-  s7 = x7;
-  s8 =    x8 * cospi_4_64   + x9 * cospi_28_64;
-  s9 =    x8 * cospi_28_64  - x9 * cospi_4_64;
-  s10 =   x10 * cospi_20_64 + x11 * cospi_12_64;
-  s11 =   x10 * cospi_12_64 - x11 * cospi_20_64;
-  s12 = - x12 * cospi_28_64 + x13 * cospi_4_64;
-  s13 =   x12 * cospi_4_64  + x13 * cospi_28_64;
-  s14 = - x14 * cospi_12_64 + x15 * cospi_20_64;
-  s15 =   x14 * cospi_20_64 + x15 * cospi_12_64;
-
-  x0 = WRAPLOW(s0 + s4, 8);
-  x1 = WRAPLOW(s1 + s5, 8);
-  x2 = WRAPLOW(s2 + s6, 8);
-  x3 = WRAPLOW(s3 + s7, 8);
-  x4 = WRAPLOW(s0 - s4, 8);
-  x5 = WRAPLOW(s1 - s5, 8);
-  x6 = WRAPLOW(s2 - s6, 8);
-  x7 = WRAPLOW(s3 - s7, 8);
-  x8 = WRAPLOW(dct_const_round_shift(s8 + s12), 8);
-  x9 = WRAPLOW(dct_const_round_shift(s9 + s13), 8);
-  x10 = WRAPLOW(dct_const_round_shift(s10 + s14), 8);
-  x11 = WRAPLOW(dct_const_round_shift(s11 + s15), 8);
-  x12 = WRAPLOW(dct_const_round_shift(s8 - s12), 8);
-  x13 = WRAPLOW(dct_const_round_shift(s9 - s13), 8);
-  x14 = WRAPLOW(dct_const_round_shift(s10 - s14), 8);
-  x15 = WRAPLOW(dct_const_round_shift(s11 - s15), 8);
-
-  // stage 3
-  s0 = x0;
-  s1 = x1;
-  s2 = x2;
-  s3 = x3;
-  s4 = x4 * cospi_8_64  + x5 * cospi_24_64;
-  s5 = x4 * cospi_24_64 - x5 * cospi_8_64;
-  s6 = - x6 * cospi_24_64 + x7 * cospi_8_64;
-  s7 =   x6 * cospi_8_64  + x7 * cospi_24_64;
-  s8 = x8;
-  s9 = x9;
-  s10 = x10;
-  s11 = x11;
-  s12 = x12 * cospi_8_64  + x13 * cospi_24_64;
-  s13 = x12 * cospi_24_64 - x13 * cospi_8_64;
-  s14 = - x14 * cospi_24_64 + x15 * cospi_8_64;
-  s15 =   x14 * cospi_8_64  + x15 * cospi_24_64;
-
-  x0 = WRAPLOW(check_range(s0 + s2), 8);
-  x1 = WRAPLOW(check_range(s1 + s3), 8);
-  x2 = WRAPLOW(check_range(s0 - s2), 8);
-  x3 = WRAPLOW(check_range(s1 - s3), 8);
-  x4 = WRAPLOW(dct_const_round_shift(s4 + s6), 8);
-  x5 = WRAPLOW(dct_const_round_shift(s5 + s7), 8);
-  x6 = WRAPLOW(dct_const_round_shift(s4 - s6), 8);
-  x7 = WRAPLOW(dct_const_round_shift(s5 - s7), 8);
-  x8 = WRAPLOW(check_range(s8 + s10), 8);
-  x9 = WRAPLOW(check_range(s9 + s11), 8);
-  x10 = WRAPLOW(check_range(s8 - s10), 8);
-  x11 = WRAPLOW(check_range(s9 - s11), 8);
-  x12 = WRAPLOW(dct_const_round_shift(s12 + s14), 8);
-  x13 = WRAPLOW(dct_const_round_shift(s13 + s15), 8);
-  x14 = WRAPLOW(dct_const_round_shift(s12 - s14), 8);
-  x15 = WRAPLOW(dct_const_round_shift(s13 - s15), 8);
-
-  // stage 4
-  s2 = (- cospi_16_64) * (x2 + x3);
-  s3 = cospi_16_64 * (x2 - x3);
-  s6 = cospi_16_64 * (x6 + x7);
-  s7 = cospi_16_64 * (- x6 + x7);
-  s10 = cospi_16_64 * (x10 + x11);
-  s11 = cospi_16_64 * (- x10 + x11);
-  s14 = (- cospi_16_64) * (x14 + x15);
-  s15 = cospi_16_64 * (x14 - x15);
-
-  x2 = WRAPLOW(dct_const_round_shift(s2), 8);
-  x3 = WRAPLOW(dct_const_round_shift(s3), 8);
-  x6 = WRAPLOW(dct_const_round_shift(s6), 8);
-  x7 = WRAPLOW(dct_const_round_shift(s7), 8);
-  x10 = WRAPLOW(dct_const_round_shift(s10), 8);
-  x11 = WRAPLOW(dct_const_round_shift(s11), 8);
-  x14 = WRAPLOW(dct_const_round_shift(s14), 8);
-  x15 = WRAPLOW(dct_const_round_shift(s15), 8);
-
-  output[0] = WRAPLOW(x0, 8);
-  output[1] = WRAPLOW(-x8, 8);
-  output[2] = WRAPLOW(x12, 8);
-  output[3] = WRAPLOW(-x4, 8);
-  output[4] = WRAPLOW(x6, 8);
-  output[5] = WRAPLOW(x14, 8);
-  output[6] = WRAPLOW(x10, 8);
-  output[7] = WRAPLOW(x2, 8);
-  output[8] = WRAPLOW(x3, 8);
-  output[9] = WRAPLOW(x11, 8);
-  output[10] = WRAPLOW(x15, 8);
-  output[11] = WRAPLOW(x7, 8);
-  output[12] = WRAPLOW(x5, 8);
-  output[13] = WRAPLOW(-x13, 8);
-  output[14] = WRAPLOW(x9, 8);
-  output[15] = WRAPLOW(-x1, 8);
-}
-
 static const transform_2d IHT_16[] = {
-  { idct16,  idct16  },  // DCT_DCT  = 0
-  { iadst16, idct16  },  // ADST_DCT = 1
-  { idct16,  iadst16 },  // DCT_ADST = 2
-  { iadst16, iadst16 }   // ADST_ADST = 3
+  { idct16_c,  idct16_c  },  // DCT_DCT  = 0
+  { iadst16_c, idct16_c  },  // ADST_DCT = 1
+  { idct16_c,  iadst16_c },  // DCT_ADST = 2
+  { iadst16_c, iadst16_c }   // ADST_ADST = 3
 };
 
 void vp9_iht16x16_256_add_c(const tran_low_t *input, uint8_t *dest, int stride,
@@ -848,494 +119,6 @@ void vp9_iht16x16_256_add_c(const tran_low_t *input, uint8_t *dest, int stride,
   }
 }
 
-void vp9_idct16x16_10_add_c(const tran_low_t *input, uint8_t *dest,
-                            int stride) {
-  tran_low_t out[16 * 16] = { 0 };
-  tran_low_t *outptr = out;
-  int i, j;
-  tran_low_t temp_in[16], temp_out[16];
-
-  // First transform rows. Since all non-zero dct coefficients are in
-  // upper-left 4x4 area, we only need to calculate first 4 rows here.
-  for (i = 0; i < 4; ++i) {
-    idct16(input, outptr);
-    input += 16;
-    outptr += 16;
-  }
-
-  // Then transform columns
-  for (i = 0; i < 16; ++i) {
-    for (j = 0; j < 16; ++j)
-      temp_in[j] = out[j*16 + i];
-    idct16(temp_in, temp_out);
-    for (j = 0; j < 16; ++j) {
-      dest[j * stride + i] = clip_pixel_add(dest[j * stride + i],
-                                            ROUND_POWER_OF_TWO(temp_out[j], 6));
-    }
-  }
-}
-
-void vp9_idct16x16_1_add_c(const tran_low_t *input, uint8_t *dest, int stride) {
-  int i, j;
-  tran_high_t a1;
-  tran_low_t out = WRAPLOW(dct_const_round_shift(input[0] * cospi_16_64), 8);
-  out = WRAPLOW(dct_const_round_shift(out * cospi_16_64), 8);
-  a1 = ROUND_POWER_OF_TWO(out, 6);
-  for (j = 0; j < 16; ++j) {
-    for (i = 0; i < 16; ++i)
-      dest[i] = clip_pixel_add(dest[i], a1);
-    dest += stride;
-  }
-}
-
-static void idct32(const tran_low_t *input, tran_low_t *output) {
-  tran_low_t step1[32], step2[32];
-  tran_high_t temp1, temp2;
-
-  // stage 1
-  step1[0] = input[0];
-  step1[1] = input[16];
-  step1[2] = input[8];
-  step1[3] = input[24];
-  step1[4] = input[4];
-  step1[5] = input[20];
-  step1[6] = input[12];
-  step1[7] = input[28];
-  step1[8] = input[2];
-  step1[9] = input[18];
-  step1[10] = input[10];
-  step1[11] = input[26];
-  step1[12] = input[6];
-  step1[13] = input[22];
-  step1[14] = input[14];
-  step1[15] = input[30];
-
-  temp1 = input[1] * cospi_31_64 - input[31] * cospi_1_64;
-  temp2 = input[1] * cospi_1_64 + input[31] * cospi_31_64;
-  step1[16] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[31] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  temp1 = input[17] * cospi_15_64 - input[15] * cospi_17_64;
-  temp2 = input[17] * cospi_17_64 + input[15] * cospi_15_64;
-  step1[17] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[30] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  temp1 = input[9] * cospi_23_64 - input[23] * cospi_9_64;
-  temp2 = input[9] * cospi_9_64 + input[23] * cospi_23_64;
-  step1[18] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[29] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  temp1 = input[25] * cospi_7_64 - input[7] * cospi_25_64;
-  temp2 = input[25] * cospi_25_64 + input[7] * cospi_7_64;
-  step1[19] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[28] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  temp1 = input[5] * cospi_27_64 - input[27] * cospi_5_64;
-  temp2 = input[5] * cospi_5_64 + input[27] * cospi_27_64;
-  step1[20] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[27] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  temp1 = input[21] * cospi_11_64 - input[11] * cospi_21_64;
-  temp2 = input[21] * cospi_21_64 + input[11] * cospi_11_64;
-  step1[21] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[26] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  temp1 = input[13] * cospi_19_64 - input[19] * cospi_13_64;
-  temp2 = input[13] * cospi_13_64 + input[19] * cospi_19_64;
-  step1[22] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[25] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  temp1 = input[29] * cospi_3_64 - input[3] * cospi_29_64;
-  temp2 = input[29] * cospi_29_64 + input[3] * cospi_3_64;
-  step1[23] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[24] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  // stage 2
-  step2[0] = step1[0];
-  step2[1] = step1[1];
-  step2[2] = step1[2];
-  step2[3] = step1[3];
-  step2[4] = step1[4];
-  step2[5] = step1[5];
-  step2[6] = step1[6];
-  step2[7] = step1[7];
-
-  temp1 = step1[8] * cospi_30_64 - step1[15] * cospi_2_64;
-  temp2 = step1[8] * cospi_2_64 + step1[15] * cospi_30_64;
-  step2[8] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[15] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  temp1 = step1[9] * cospi_14_64 - step1[14] * cospi_18_64;
-  temp2 = step1[9] * cospi_18_64 + step1[14] * cospi_14_64;
-  step2[9] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[14] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  temp1 = step1[10] * cospi_22_64 - step1[13] * cospi_10_64;
-  temp2 = step1[10] * cospi_10_64 + step1[13] * cospi_22_64;
-  step2[10] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[13] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  temp1 = step1[11] * cospi_6_64 - step1[12] * cospi_26_64;
-  temp2 = step1[11] * cospi_26_64 + step1[12] * cospi_6_64;
-  step2[11] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[12] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  step2[16] = WRAPLOW(step1[16] + step1[17], 8);
-  step2[17] = WRAPLOW(step1[16] - step1[17], 8);
-  step2[18] = WRAPLOW(-step1[18] + step1[19], 8);
-  step2[19] = WRAPLOW(step1[18] + step1[19], 8);
-  step2[20] = WRAPLOW(step1[20] + step1[21], 8);
-  step2[21] = WRAPLOW(step1[20] - step1[21], 8);
-  step2[22] = WRAPLOW(-step1[22] + step1[23], 8);
-  step2[23] = WRAPLOW(step1[22] + step1[23], 8);
-  step2[24] = WRAPLOW(step1[24] + step1[25], 8);
-  step2[25] = WRAPLOW(step1[24] - step1[25], 8);
-  step2[26] = WRAPLOW(-step1[26] + step1[27], 8);
-  step2[27] = WRAPLOW(step1[26] + step1[27], 8);
-  step2[28] = WRAPLOW(step1[28] + step1[29], 8);
-  step2[29] = WRAPLOW(step1[28] - step1[29], 8);
-  step2[30] = WRAPLOW(-step1[30] + step1[31], 8);
-  step2[31] = WRAPLOW(step1[30] + step1[31], 8);
-
-  // stage 3
-  step1[0] = step2[0];
-  step1[1] = step2[1];
-  step1[2] = step2[2];
-  step1[3] = step2[3];
-
-  temp1 = step2[4] * cospi_28_64 - step2[7] * cospi_4_64;
-  temp2 = step2[4] * cospi_4_64 + step2[7] * cospi_28_64;
-  step1[4] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[7] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  temp1 = step2[5] * cospi_12_64 - step2[6] * cospi_20_64;
-  temp2 = step2[5] * cospi_20_64 + step2[6] * cospi_12_64;
-  step1[5] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[6] = WRAPLOW(dct_const_round_shift(temp2), 8);
-
-  step1[8] = WRAPLOW(step2[8] + step2[9], 8);
-  step1[9] = WRAPLOW(step2[8] - step2[9], 8);
-  step1[10] = WRAPLOW(-step2[10] + step2[11], 8);
-  step1[11] = WRAPLOW(step2[10] + step2[11], 8);
-  step1[12] = WRAPLOW(step2[12] + step2[13], 8);
-  step1[13] = WRAPLOW(step2[12] - step2[13], 8);
-  step1[14] = WRAPLOW(-step2[14] + step2[15], 8);
-  step1[15] = WRAPLOW(step2[14] + step2[15], 8);
-
-  step1[16] = step2[16];
-  step1[31] = step2[31];
-  temp1 = -step2[17] * cospi_4_64 + step2[30] * cospi_28_64;
-  temp2 = step2[17] * cospi_28_64 + step2[30] * cospi_4_64;
-  step1[17] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[30] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  temp1 = -step2[18] * cospi_28_64 - step2[29] * cospi_4_64;
-  temp2 = -step2[18] * cospi_4_64 + step2[29] * cospi_28_64;
-  step1[18] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[29] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  step1[19] = step2[19];
-  step1[20] = step2[20];
-  temp1 = -step2[21] * cospi_20_64 + step2[26] * cospi_12_64;
-  temp2 = step2[21] * cospi_12_64 + step2[26] * cospi_20_64;
-  step1[21] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[26] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  temp1 = -step2[22] * cospi_12_64 - step2[25] * cospi_20_64;
-  temp2 = -step2[22] * cospi_20_64 + step2[25] * cospi_12_64;
-  step1[22] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[25] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  step1[23] = step2[23];
-  step1[24] = step2[24];
-  step1[27] = step2[27];
-  step1[28] = step2[28];
-
-  // stage 4
-  temp1 = (step1[0] + step1[1]) * cospi_16_64;
-  temp2 = (step1[0] - step1[1]) * cospi_16_64;
-  step2[0] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[1] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  temp1 = step1[2] * cospi_24_64 - step1[3] * cospi_8_64;
-  temp2 = step1[2] * cospi_8_64 + step1[3] * cospi_24_64;
-  step2[2] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[3] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  step2[4] = WRAPLOW(step1[4] + step1[5], 8);
-  step2[5] = WRAPLOW(step1[4] - step1[5], 8);
-  step2[6] = WRAPLOW(-step1[6] + step1[7], 8);
-  step2[7] = WRAPLOW(step1[6] + step1[7], 8);
-
-  step2[8] = step1[8];
-  step2[15] = step1[15];
-  temp1 = -step1[9] * cospi_8_64 + step1[14] * cospi_24_64;
-  temp2 = step1[9] * cospi_24_64 + step1[14] * cospi_8_64;
-  step2[9] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[14] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  temp1 = -step1[10] * cospi_24_64 - step1[13] * cospi_8_64;
-  temp2 = -step1[10] * cospi_8_64 + step1[13] * cospi_24_64;
-  step2[10] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[13] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  step2[11] = step1[11];
-  step2[12] = step1[12];
-
-  step2[16] = WRAPLOW(step1[16] + step1[19], 8);
-  step2[17] = WRAPLOW(step1[17] + step1[18], 8);
-  step2[18] = WRAPLOW(step1[17] - step1[18], 8);
-  step2[19] = WRAPLOW(step1[16] - step1[19], 8);
-  step2[20] = WRAPLOW(-step1[20] + step1[23], 8);
-  step2[21] = WRAPLOW(-step1[21] + step1[22], 8);
-  step2[22] = WRAPLOW(step1[21] + step1[22], 8);
-  step2[23] = WRAPLOW(step1[20] + step1[23], 8);
-
-  step2[24] = WRAPLOW(step1[24] + step1[27], 8);
-  step2[25] = WRAPLOW(step1[25] + step1[26], 8);
-  step2[26] = WRAPLOW(step1[25] - step1[26], 8);
-  step2[27] = WRAPLOW(step1[24] - step1[27], 8);
-  step2[28] = WRAPLOW(-step1[28] + step1[31], 8);
-  step2[29] = WRAPLOW(-step1[29] + step1[30], 8);
-  step2[30] = WRAPLOW(step1[29] + step1[30], 8);
-  step2[31] = WRAPLOW(step1[28] + step1[31], 8);
-
-  // stage 5
-  step1[0] = WRAPLOW(step2[0] + step2[3], 8);
-  step1[1] = WRAPLOW(step2[1] + step2[2], 8);
-  step1[2] = WRAPLOW(step2[1] - step2[2], 8);
-  step1[3] = WRAPLOW(step2[0] - step2[3], 8);
-  step1[4] = step2[4];
-  temp1 = (step2[6] - step2[5]) * cospi_16_64;
-  temp2 = (step2[5] + step2[6]) * cospi_16_64;
-  step1[5] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[6] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  step1[7] = step2[7];
-
-  step1[8] = WRAPLOW(step2[8] + step2[11], 8);
-  step1[9] = WRAPLOW(step2[9] + step2[10], 8);
-  step1[10] = WRAPLOW(step2[9] - step2[10], 8);
-  step1[11] = WRAPLOW(step2[8] - step2[11], 8);
-  step1[12] = WRAPLOW(-step2[12] + step2[15], 8);
-  step1[13] = WRAPLOW(-step2[13] + step2[14], 8);
-  step1[14] = WRAPLOW(step2[13] + step2[14], 8);
-  step1[15] = WRAPLOW(step2[12] + step2[15], 8);
-
-  step1[16] = step2[16];
-  step1[17] = step2[17];
-  temp1 = -step2[18] * cospi_8_64 + step2[29] * cospi_24_64;
-  temp2 = step2[18] * cospi_24_64 + step2[29] * cospi_8_64;
-  step1[18] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[29] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  temp1 = -step2[19] * cospi_8_64 + step2[28] * cospi_24_64;
-  temp2 = step2[19] * cospi_24_64 + step2[28] * cospi_8_64;
-  step1[19] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[28] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  temp1 = -step2[20] * cospi_24_64 - step2[27] * cospi_8_64;
-  temp2 = -step2[20] * cospi_8_64 + step2[27] * cospi_24_64;
-  step1[20] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[27] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  temp1 = -step2[21] * cospi_24_64 - step2[26] * cospi_8_64;
-  temp2 = -step2[21] * cospi_8_64 + step2[26] * cospi_24_64;
-  step1[21] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[26] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  step1[22] = step2[22];
-  step1[23] = step2[23];
-  step1[24] = step2[24];
-  step1[25] = step2[25];
-  step1[30] = step2[30];
-  step1[31] = step2[31];
-
-  // stage 6
-  step2[0] = WRAPLOW(step1[0] + step1[7], 8);
-  step2[1] = WRAPLOW(step1[1] + step1[6], 8);
-  step2[2] = WRAPLOW(step1[2] + step1[5], 8);
-  step2[3] = WRAPLOW(step1[3] + step1[4], 8);
-  step2[4] = WRAPLOW(step1[3] - step1[4], 8);
-  step2[5] = WRAPLOW(step1[2] - step1[5], 8);
-  step2[6] = WRAPLOW(step1[1] - step1[6], 8);
-  step2[7] = WRAPLOW(step1[0] - step1[7], 8);
-  step2[8] = step1[8];
-  step2[9] = step1[9];
-  temp1 = (-step1[10] + step1[13]) * cospi_16_64;
-  temp2 = (step1[10] + step1[13]) * cospi_16_64;
-  step2[10] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[13] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  temp1 = (-step1[11] + step1[12]) * cospi_16_64;
-  temp2 = (step1[11] + step1[12]) * cospi_16_64;
-  step2[11] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step2[12] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  step2[14] = step1[14];
-  step2[15] = step1[15];
-
-  step2[16] = WRAPLOW(step1[16] + step1[23], 8);
-  step2[17] = WRAPLOW(step1[17] + step1[22], 8);
-  step2[18] = WRAPLOW(step1[18] + step1[21], 8);
-  step2[19] = WRAPLOW(step1[19] + step1[20], 8);
-  step2[20] = WRAPLOW(step1[19] - step1[20], 8);
-  step2[21] = WRAPLOW(step1[18] - step1[21], 8);
-  step2[22] = WRAPLOW(step1[17] - step1[22], 8);
-  step2[23] = WRAPLOW(step1[16] - step1[23], 8);
-
-  step2[24] = WRAPLOW(-step1[24] + step1[31], 8);
-  step2[25] = WRAPLOW(-step1[25] + step1[30], 8);
-  step2[26] = WRAPLOW(-step1[26] + step1[29], 8);
-  step2[27] = WRAPLOW(-step1[27] + step1[28], 8);
-  step2[28] = WRAPLOW(step1[27] + step1[28], 8);
-  step2[29] = WRAPLOW(step1[26] + step1[29], 8);
-  step2[30] = WRAPLOW(step1[25] + step1[30], 8);
-  step2[31] = WRAPLOW(step1[24] + step1[31], 8);
-
-  // stage 7
-  step1[0] = WRAPLOW(step2[0] + step2[15], 8);
-  step1[1] = WRAPLOW(step2[1] + step2[14], 8);
-  step1[2] = WRAPLOW(step2[2] + step2[13], 8);
-  step1[3] = WRAPLOW(step2[3] + step2[12], 8);
-  step1[4] = WRAPLOW(step2[4] + step2[11], 8);
-  step1[5] = WRAPLOW(step2[5] + step2[10], 8);
-  step1[6] = WRAPLOW(step2[6] + step2[9], 8);
-  step1[7] = WRAPLOW(step2[7] + step2[8], 8);
-  step1[8] = WRAPLOW(step2[7] - step2[8], 8);
-  step1[9] = WRAPLOW(step2[6] - step2[9], 8);
-  step1[10] = WRAPLOW(step2[5] - step2[10], 8);
-  step1[11] = WRAPLOW(step2[4] - step2[11], 8);
-  step1[12] = WRAPLOW(step2[3] - step2[12], 8);
-  step1[13] = WRAPLOW(step2[2] - step2[13], 8);
-  step1[14] = WRAPLOW(step2[1] - step2[14], 8);
-  step1[15] = WRAPLOW(step2[0] - step2[15], 8);
-
-  step1[16] = step2[16];
-  step1[17] = step2[17];
-  step1[18] = step2[18];
-  step1[19] = step2[19];
-  temp1 = (-step2[20] + step2[27]) * cospi_16_64;
-  temp2 = (step2[20] + step2[27]) * cospi_16_64;
-  step1[20] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[27] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  temp1 = (-step2[21] + step2[26]) * cospi_16_64;
-  temp2 = (step2[21] + step2[26]) * cospi_16_64;
-  step1[21] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[26] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  temp1 = (-step2[22] + step2[25]) * cospi_16_64;
-  temp2 = (step2[22] + step2[25]) * cospi_16_64;
-  step1[22] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[25] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  temp1 = (-step2[23] + step2[24]) * cospi_16_64;
-  temp2 = (step2[23] + step2[24]) * cospi_16_64;
-  step1[23] = WRAPLOW(dct_const_round_shift(temp1), 8);
-  step1[24] = WRAPLOW(dct_const_round_shift(temp2), 8);
-  step1[28] = step2[28];
-  step1[29] = step2[29];
-  step1[30] = step2[30];
-  step1[31] = step2[31];
-
-  // final stage
-  output[0] = WRAPLOW(step1[0] + step1[31], 8);
-  output[1] = WRAPLOW(step1[1] + step1[30], 8);
-  output[2] = WRAPLOW(step1[2] + step1[29], 8);
-  output[3] = WRAPLOW(step1[3] + step1[28], 8);
-  output[4] = WRAPLOW(step1[4] + step1[27], 8);
-  output[5] = WRAPLOW(step1[5] + step1[26], 8);
-  output[6] = WRAPLOW(step1[6] + step1[25], 8);
-  output[7] = WRAPLOW(step1[7] + step1[24], 8);
-  output[8] = WRAPLOW(step1[8] + step1[23], 8);
-  output[9] = WRAPLOW(step1[9] + step1[22], 8);
-  output[10] = WRAPLOW(step1[10] + step1[21], 8);
-  output[11] = WRAPLOW(step1[11] + step1[20], 8);
-  output[12] = WRAPLOW(step1[12] + step1[19], 8);
-  output[13] = WRAPLOW(step1[13] + step1[18], 8);
-  output[14] = WRAPLOW(step1[14] + step1[17], 8);
-  output[15] = WRAPLOW(step1[15] + step1[16], 8);
-  output[16] = WRAPLOW(step1[15] - step1[16], 8);
-  output[17] = WRAPLOW(step1[14] - step1[17], 8);
-  output[18] = WRAPLOW(step1[13] - step1[18], 8);
-  output[19] = WRAPLOW(step1[12] - step1[19], 8);
-  output[20] = WRAPLOW(step1[11] - step1[20], 8);
-  output[21] = WRAPLOW(step1[10] - step1[21], 8);
-  output[22] = WRAPLOW(step1[9] - step1[22], 8);
-  output[23] = WRAPLOW(step1[8] - step1[23], 8);
-  output[24] = WRAPLOW(step1[7] - step1[24], 8);
-  output[25] = WRAPLOW(step1[6] - step1[25], 8);
-  output[26] = WRAPLOW(step1[5] - step1[26], 8);
-  output[27] = WRAPLOW(step1[4] - step1[27], 8);
-  output[28] = WRAPLOW(step1[3] - step1[28], 8);
-  output[29] = WRAPLOW(step1[2] - step1[29], 8);
-  output[30] = WRAPLOW(step1[1] - step1[30], 8);
-  output[31] = WRAPLOW(step1[0] - step1[31], 8);
-}
-
-void vp9_idct32x32_1024_add_c(const tran_low_t *input, uint8_t *dest,
-                              int stride) {
-  tran_low_t out[32 * 32];
-  tran_low_t *outptr = out;
-  int i, j;
-  tran_low_t temp_in[32], temp_out[32];
-
-  // Rows
-  for (i = 0; i < 32; ++i) {
-    int16_t zero_coeff[16];
-    for (j = 0; j < 16; ++j)
-      zero_coeff[j] = input[2 * j] | input[2 * j + 1];
-    for (j = 0; j < 8; ++j)
-      zero_coeff[j] = zero_coeff[2 * j] | zero_coeff[2 * j + 1];
-    for (j = 0; j < 4; ++j)
-      zero_coeff[j] = zero_coeff[2 * j] | zero_coeff[2 * j + 1];
-    for (j = 0; j < 2; ++j)
-      zero_coeff[j] = zero_coeff[2 * j] | zero_coeff[2 * j + 1];
-
-    if (zero_coeff[0] | zero_coeff[1])
-      idct32(input, outptr);
-    else
-      memset(outptr, 0, sizeof(tran_low_t) * 32);
-    input += 32;
-    outptr += 32;
-  }
-
-  // Columns
-  for (i = 0; i < 32; ++i) {
-    for (j = 0; j < 32; ++j)
-      temp_in[j] = out[j * 32 + i];
-    idct32(temp_in, temp_out);
-    for (j = 0; j < 32; ++j) {
-      dest[j * stride + i] = clip_pixel_add(dest[j * stride + i],
-                                            ROUND_POWER_OF_TWO(temp_out[j], 6));
-    }
-  }
-}
-
-void vp9_idct32x32_34_add_c(const tran_low_t *input, uint8_t *dest,
-                            int stride) {
-  tran_low_t out[32 * 32] = {0};
-  tran_low_t *outptr = out;
-  int i, j;
-  tran_low_t temp_in[32], temp_out[32];
-
-  // Rows
-  // only upper-left 8x8 has non-zero coeff
-  for (i = 0; i < 8; ++i) {
-    idct32(input, outptr);
-    input += 32;
-    outptr += 32;
-  }
-
-  // Columns
-  for (i = 0; i < 32; ++i) {
-    for (j = 0; j < 32; ++j)
-      temp_in[j] = out[j * 32 + i];
-    idct32(temp_in, temp_out);
-    for (j = 0; j < 32; ++j) {
-      dest[j * stride + i] = clip_pixel_add(dest[j * stride + i],
-                                            ROUND_POWER_OF_TWO(temp_out[j], 6));
-    }
-  }
-}
-
-void vp9_idct32x32_1_add_c(const tran_low_t *input, uint8_t *dest, int stride) {
-  int i, j;
-  tran_high_t a1;
-
-  tran_low_t out = WRAPLOW(dct_const_round_shift(input[0] * cospi_16_64), 8);
-  out = WRAPLOW(dct_const_round_shift(out * cospi_16_64), 8);
-  a1 = ROUND_POWER_OF_TWO(out, 6);
-
-  for (j = 0; j < 32; ++j) {
-    for (i = 0; i < 32; ++i)
-      dest[i] = clip_pixel_add(dest[i], a1);
-    dest += stride;
-  }
-}
-
 // idct
 void vp9_idct4x4_add(const tran_low_t *input, uint8_t *dest, int stride,
                      int eob) {
@@ -1424,294 +207,13 @@ void vp9_iht16x16_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest,
 }
 
 #if CONFIG_VP9_HIGHBITDEPTH
-void vp9_highbd_iwht4x4_16_add_c(const tran_low_t *input, uint8_t *dest8,
-                                 int stride, int bd) {
-  /* 4-point reversible, orthonormal inverse Walsh-Hadamard in 3.5 adds,
-     0.5 shifts per pixel. */
-  int i;
-  tran_low_t output[16];
-  tran_high_t a1, b1, c1, d1, e1;
-  const tran_low_t *ip = input;
-  tran_low_t *op = output;
-  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
-
-  for (i = 0; i < 4; i++) {
-    a1 = ip[0] >> UNIT_QUANT_SHIFT;
-    c1 = ip[1] >> UNIT_QUANT_SHIFT;
-    d1 = ip[2] >> UNIT_QUANT_SHIFT;
-    b1 = ip[3] >> UNIT_QUANT_SHIFT;
-    a1 += c1;
-    d1 -= b1;
-    e1 = (a1 - d1) >> 1;
-    b1 = e1 - b1;
-    c1 = e1 - c1;
-    a1 -= b1;
-    d1 += c1;
-    op[0] = WRAPLOW(a1, bd);
-    op[1] = WRAPLOW(b1, bd);
-    op[2] = WRAPLOW(c1, bd);
-    op[3] = WRAPLOW(d1, bd);
-    ip += 4;
-    op += 4;
-  }
-
-  ip = output;
-  for (i = 0; i < 4; i++) {
-    a1 = ip[4 * 0];
-    c1 = ip[4 * 1];
-    d1 = ip[4 * 2];
-    b1 = ip[4 * 3];
-    a1 += c1;
-    d1 -= b1;
-    e1 = (a1 - d1) >> 1;
-    b1 = e1 - b1;
-    c1 = e1 - c1;
-    a1 -= b1;
-    d1 += c1;
-    dest[stride * 0] = highbd_clip_pixel_add(dest[stride * 0], a1, bd);
-    dest[stride * 1] = highbd_clip_pixel_add(dest[stride * 1], b1, bd);
-    dest[stride * 2] = highbd_clip_pixel_add(dest[stride * 2], c1, bd);
-    dest[stride * 3] = highbd_clip_pixel_add(dest[stride * 3], d1, bd);
-
-    ip++;
-    dest++;
-  }
-}
-
-void vp9_highbd_iwht4x4_1_add_c(const tran_low_t *in, uint8_t *dest8,
-                                int dest_stride, int bd) {
-  int i;
-  tran_high_t a1, e1;
-  tran_low_t tmp[4];
-  const tran_low_t *ip = in;
-  tran_low_t *op = tmp;
-  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
-  (void) bd;
-
-  a1 = ip[0] >> UNIT_QUANT_SHIFT;
-  e1 = a1 >> 1;
-  a1 -= e1;
-  op[0] = WRAPLOW(a1, bd);
-  op[1] = op[2] = op[3] = WRAPLOW(e1, bd);
-
-  ip = tmp;
-  for (i = 0; i < 4; i++) {
-    e1 = ip[0] >> 1;
-    a1 = ip[0] - e1;
-    dest[dest_stride * 0] = highbd_clip_pixel_add(
-        dest[dest_stride * 0], a1, bd);
-    dest[dest_stride * 1] = highbd_clip_pixel_add(
-        dest[dest_stride * 1], e1, bd);
-    dest[dest_stride * 2] = highbd_clip_pixel_add(
-        dest[dest_stride * 2], e1, bd);
-    dest[dest_stride * 3] = highbd_clip_pixel_add(
-        dest[dest_stride * 3], e1, bd);
-    ip++;
-    dest++;
-  }
-}
-
-void vp9_highbd_idct4(const tran_low_t *input, tran_low_t *output, int bd) {
-  tran_low_t step[4];
-  tran_high_t temp1, temp2;
-  (void) bd;
-  // stage 1
-  temp1 = (input[0] + input[2]) * cospi_16_64;
-  temp2 = (input[0] - input[2]) * cospi_16_64;
-  step[0] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step[1] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  temp1 = input[1] * cospi_24_64 - input[3] * cospi_8_64;
-  temp2 = input[1] * cospi_8_64 + input[3] * cospi_24_64;
-  step[2] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step[3] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  // stage 2
-  output[0] = WRAPLOW(step[0] + step[3], bd);
-  output[1] = WRAPLOW(step[1] + step[2], bd);
-  output[2] = WRAPLOW(step[1] - step[2], bd);
-  output[3] = WRAPLOW(step[0] - step[3], bd);
-}
-
-void vp9_highbd_idct4x4_16_add_c(const tran_low_t *input, uint8_t *dest8,
-                                 int stride, int bd) {
-  tran_low_t out[4 * 4];
-  tran_low_t *outptr = out;
-  int i, j;
-  tran_low_t temp_in[4], temp_out[4];
-  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
-
-  // Rows
-  for (i = 0; i < 4; ++i) {
-    vp9_highbd_idct4(input, outptr, bd);
-    input += 4;
-    outptr += 4;
-  }
-
-  // Columns
-  for (i = 0; i < 4; ++i) {
-    for (j = 0; j < 4; ++j)
-      temp_in[j] = out[j * 4 + i];
-    vp9_highbd_idct4(temp_in, temp_out, bd);
-    for (j = 0; j < 4; ++j) {
-      dest[j * stride + i] = highbd_clip_pixel_add(
-          dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 4), bd);
-    }
-  }
-}
-
-void vp9_highbd_idct4x4_1_add_c(const tran_low_t *input, uint8_t *dest8,
-                                int dest_stride, int bd) {
-  int i;
-  tran_high_t a1;
-  tran_low_t out = WRAPLOW(
-      highbd_dct_const_round_shift(input[0] * cospi_16_64, bd), bd);
-  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
-
-  out = WRAPLOW(highbd_dct_const_round_shift(out * cospi_16_64, bd), bd);
-  a1 = ROUND_POWER_OF_TWO(out, 4);
-
-  for (i = 0; i < 4; i++) {
-    dest[0] = highbd_clip_pixel_add(dest[0], a1, bd);
-    dest[1] = highbd_clip_pixel_add(dest[1], a1, bd);
-    dest[2] = highbd_clip_pixel_add(dest[2], a1, bd);
-    dest[3] = highbd_clip_pixel_add(dest[3], a1, bd);
-    dest += dest_stride;
-  }
-}
-
-void vp9_highbd_idct8(const tran_low_t *input, tran_low_t *output, int bd) {
-  tran_low_t step1[8], step2[8];
-  tran_high_t temp1, temp2;
-  // stage 1
-  step1[0] = input[0];
-  step1[2] = input[4];
-  step1[1] = input[2];
-  step1[3] = input[6];
-  temp1 = input[1] * cospi_28_64 - input[7] * cospi_4_64;
-  temp2 = input[1] * cospi_4_64 + input[7] * cospi_28_64;
-  step1[4] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[7] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  temp1 = input[5] * cospi_12_64 - input[3] * cospi_20_64;
-  temp2 = input[5] * cospi_20_64 + input[3] * cospi_12_64;
-  step1[5] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[6] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  // stage 2 & stage 3 - even half
-  vp9_highbd_idct4(step1, step1, bd);
-
-  // stage 2 - odd half
-  step2[4] = WRAPLOW(step1[4] + step1[5], bd);
-  step2[5] = WRAPLOW(step1[4] - step1[5], bd);
-  step2[6] = WRAPLOW(-step1[6] + step1[7], bd);
-  step2[7] = WRAPLOW(step1[6] + step1[7], bd);
-
-  // stage 3 - odd half
-  step1[4] = step2[4];
-  temp1 = (step2[6] - step2[5]) * cospi_16_64;
-  temp2 = (step2[5] + step2[6]) * cospi_16_64;
-  step1[5] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[6] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  step1[7] = step2[7];
-
-  // stage 4
-  output[0] = WRAPLOW(step1[0] + step1[7], bd);
-  output[1] = WRAPLOW(step1[1] + step1[6], bd);
-  output[2] = WRAPLOW(step1[2] + step1[5], bd);
-  output[3] = WRAPLOW(step1[3] + step1[4], bd);
-  output[4] = WRAPLOW(step1[3] - step1[4], bd);
-  output[5] = WRAPLOW(step1[2] - step1[5], bd);
-  output[6] = WRAPLOW(step1[1] - step1[6], bd);
-  output[7] = WRAPLOW(step1[0] - step1[7], bd);
-}
-
-void vp9_highbd_idct8x8_64_add_c(const tran_low_t *input, uint8_t *dest8,
-                                 int stride, int bd) {
-  tran_low_t out[8 * 8];
-  tran_low_t *outptr = out;
-  int i, j;
-  tran_low_t temp_in[8], temp_out[8];
-  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
-
-  // First transform rows.
-  for (i = 0; i < 8; ++i) {
-    vp9_highbd_idct8(input, outptr, bd);
-    input += 8;
-    outptr += 8;
-  }
-
-  // Then transform columns.
-  for (i = 0; i < 8; ++i) {
-    for (j = 0; j < 8; ++j)
-      temp_in[j] = out[j * 8 + i];
-    vp9_highbd_idct8(temp_in, temp_out, bd);
-    for (j = 0; j < 8; ++j) {
-      dest[j * stride + i] = highbd_clip_pixel_add(
-          dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 5), bd);
-    }
-  }
-}
-
-void vp9_highbd_idct8x8_1_add_c(const tran_low_t *input, uint8_t *dest8,
-                                int stride, int bd) {
-  int i, j;
-  tran_high_t a1;
-  tran_low_t out = WRAPLOW(
-      highbd_dct_const_round_shift(input[0] * cospi_16_64, bd), bd);
-  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
-  out = WRAPLOW(highbd_dct_const_round_shift(out * cospi_16_64, bd), bd);
-  a1 = ROUND_POWER_OF_TWO(out, 5);
-  for (j = 0; j < 8; ++j) {
-    for (i = 0; i < 8; ++i)
-      dest[i] = highbd_clip_pixel_add(dest[i], a1, bd);
-    dest += stride;
-  }
-}
-
-static void highbd_iadst4(const tran_low_t *input, tran_low_t *output, int bd) {
-  tran_high_t s0, s1, s2, s3, s4, s5, s6, s7;
-
-  tran_low_t x0 = input[0];
-  tran_low_t x1 = input[1];
-  tran_low_t x2 = input[2];
-  tran_low_t x3 = input[3];
-  (void) bd;
-
-  if (!(x0 | x1 | x2 | x3)) {
-    memset(output, 0, 4 * sizeof(*output));
-    return;
-  }
-
-  s0 = sinpi_1_9 * x0;
-  s1 = sinpi_2_9 * x0;
-  s2 = sinpi_3_9 * x1;
-  s3 = sinpi_4_9 * x2;
-  s4 = sinpi_1_9 * x2;
-  s5 = sinpi_2_9 * x3;
-  s6 = sinpi_4_9 * x3;
-  s7 = (tran_high_t)(x0 - x2 + x3);
-
-  s0 = s0 + s3 + s5;
-  s1 = s1 - s4 - s6;
-  s3 = s2;
-  s2 = sinpi_3_9 * s7;
-
-  // 1-D transform scaling factor is sqrt(2).
-  // The overall dynamic range is 14b (input) + 14b (multiplication scaling)
-  // + 1b (addition) = 29b.
-  // Hence the output bit depth is 15b.
-  output[0] = WRAPLOW(highbd_dct_const_round_shift(s0 + s3, bd), bd);
-  output[1] = WRAPLOW(highbd_dct_const_round_shift(s1 + s3, bd), bd);
-  output[2] = WRAPLOW(highbd_dct_const_round_shift(s2, bd), bd);
-  output[3] = WRAPLOW(highbd_dct_const_round_shift(s0 + s1 - s3, bd), bd);
-}
-
 void vp9_highbd_iht4x4_16_add_c(const tran_low_t *input, uint8_t *dest8,
                                 int stride, int tx_type, int bd) {
   const highbd_transform_2d IHT_4[] = {
-    { vp9_highbd_idct4, vp9_highbd_idct4  },    // DCT_DCT  = 0
-    { highbd_iadst4, vp9_highbd_idct4 },    // ADST_DCT = 1
-    { vp9_highbd_idct4, highbd_iadst4 },    // DCT_ADST = 2
-    { highbd_iadst4, highbd_iadst4 }    // ADST_ADST = 3
+    { vp9_highbd_idct4_c, vp9_highbd_idct4_c  },    // DCT_DCT  = 0
+    { highbd_iadst4_c, vp9_highbd_idct4_c },    // ADST_DCT = 1
+    { vp9_highbd_idct4_c, highbd_iadst4_c },    // DCT_ADST = 2
+    { highbd_iadst4_c, highbd_iadst4_c }    // ADST_ADST = 3
   };
   uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
 
@@ -1739,88 +241,11 @@ void vp9_highbd_iht4x4_16_add_c(const tran_low_t *input, uint8_t *dest8,
   }
 }
 
-static void highbd_iadst8(const tran_low_t *input, tran_low_t *output, int bd) {
-  tran_high_t s0, s1, s2, s3, s4, s5, s6, s7;
-
-  tran_low_t x0 = input[7];
-  tran_low_t x1 = input[0];
-  tran_low_t x2 = input[5];
-  tran_low_t x3 = input[2];
-  tran_low_t x4 = input[3];
-  tran_low_t x5 = input[4];
-  tran_low_t x6 = input[1];
-  tran_low_t x7 = input[6];
-  (void) bd;
-
-  if (!(x0 | x1 | x2 | x3 | x4 | x5 | x6 | x7)) {
-    memset(output, 0, 8 * sizeof(*output));
-    return;
-  }
-
-  // stage 1
-  s0 = cospi_2_64  * x0 + cospi_30_64 * x1;
-  s1 = cospi_30_64 * x0 - cospi_2_64  * x1;
-  s2 = cospi_10_64 * x2 + cospi_22_64 * x3;
-  s3 = cospi_22_64 * x2 - cospi_10_64 * x3;
-  s4 = cospi_18_64 * x4 + cospi_14_64 * x5;
-  s5 = cospi_14_64 * x4 - cospi_18_64 * x5;
-  s6 = cospi_26_64 * x6 + cospi_6_64  * x7;
-  s7 = cospi_6_64  * x6 - cospi_26_64 * x7;
-
-  x0 = WRAPLOW(highbd_dct_const_round_shift(s0 + s4, bd), bd);
-  x1 = WRAPLOW(highbd_dct_const_round_shift(s1 + s5, bd), bd);
-  x2 = WRAPLOW(highbd_dct_const_round_shift(s2 + s6, bd), bd);
-  x3 = WRAPLOW(highbd_dct_const_round_shift(s3 + s7, bd), bd);
-  x4 = WRAPLOW(highbd_dct_const_round_shift(s0 - s4, bd), bd);
-  x5 = WRAPLOW(highbd_dct_const_round_shift(s1 - s5, bd), bd);
-  x6 = WRAPLOW(highbd_dct_const_round_shift(s2 - s6, bd), bd);
-  x7 = WRAPLOW(highbd_dct_const_round_shift(s3 - s7, bd), bd);
-
-  // stage 2
-  s0 = x0;
-  s1 = x1;
-  s2 = x2;
-  s3 = x3;
-  s4 =  cospi_8_64  * x4 + cospi_24_64 * x5;
-  s5 =  cospi_24_64 * x4 - cospi_8_64  * x5;
-  s6 = -cospi_24_64 * x6 + cospi_8_64  * x7;
-  s7 =  cospi_8_64  * x6 + cospi_24_64 * x7;
-
-  x0 = WRAPLOW(s0 + s2, bd);
-  x1 = WRAPLOW(s1 + s3, bd);
-  x2 = WRAPLOW(s0 - s2, bd);
-  x3 = WRAPLOW(s1 - s3, bd);
-  x4 = WRAPLOW(highbd_dct_const_round_shift(s4 + s6, bd), bd);
-  x5 = WRAPLOW(highbd_dct_const_round_shift(s5 + s7, bd), bd);
-  x6 = WRAPLOW(highbd_dct_const_round_shift(s4 - s6, bd), bd);
-  x7 = WRAPLOW(highbd_dct_const_round_shift(s5 - s7, bd), bd);
-
-  // stage 3
-  s2 = cospi_16_64 * (x2 + x3);
-  s3 = cospi_16_64 * (x2 - x3);
-  s6 = cospi_16_64 * (x6 + x7);
-  s7 = cospi_16_64 * (x6 - x7);
-
-  x2 = WRAPLOW(highbd_dct_const_round_shift(s2, bd), bd);
-  x3 = WRAPLOW(highbd_dct_const_round_shift(s3, bd), bd);
-  x6 = WRAPLOW(highbd_dct_const_round_shift(s6, bd), bd);
-  x7 = WRAPLOW(highbd_dct_const_round_shift(s7, bd), bd);
-
-  output[0] = WRAPLOW(x0, bd);
-  output[1] = WRAPLOW(-x4, bd);
-  output[2] = WRAPLOW(x6, bd);
-  output[3] = WRAPLOW(-x2, bd);
-  output[4] = WRAPLOW(x3, bd);
-  output[5] = WRAPLOW(-x7, bd);
-  output[6] = WRAPLOW(x5, bd);
-  output[7] = WRAPLOW(-x1, bd);
-}
-
 static const highbd_transform_2d HIGH_IHT_8[] = {
-  { vp9_highbd_idct8,  vp9_highbd_idct8  },  // DCT_DCT  = 0
-  { highbd_iadst8, vp9_highbd_idct8  },  // ADST_DCT = 1
-  { vp9_highbd_idct8,  highbd_iadst8 },  // DCT_ADST = 2
-  { highbd_iadst8, highbd_iadst8 }   // ADST_ADST = 3
+  { vp9_highbd_idct8_c,  vp9_highbd_idct8_c  },  // DCT_DCT  = 0
+  { highbd_iadst8_c, vp9_highbd_idct8_c  },  // ADST_DCT = 1
+  { vp9_highbd_idct8_c,  highbd_iadst8_c },  // DCT_ADST = 2
+  { highbd_iadst8_c, highbd_iadst8_c }   // ADST_ADST = 3
 };
 
 void vp9_highbd_iht8x8_64_add_c(const tran_low_t *input, uint8_t *dest8,
@@ -1851,402 +276,11 @@ void vp9_highbd_iht8x8_64_add_c(const tran_low_t *input, uint8_t *dest8,
   }
 }
 
-void vp9_highbd_idct8x8_10_add_c(const tran_low_t *input, uint8_t *dest8,
-                                 int stride, int bd) {
-  tran_low_t out[8 * 8] = { 0 };
-  tran_low_t *outptr = out;
-  int i, j;
-  tran_low_t temp_in[8], temp_out[8];
-  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
-
-  // First transform rows.
-  // Only first 4 row has non-zero coefs.
-  for (i = 0; i < 4; ++i) {
-    vp9_highbd_idct8(input, outptr, bd);
-    input += 8;
-    outptr += 8;
-  }
-  // Then transform columns.
-  for (i = 0; i < 8; ++i) {
-    for (j = 0; j < 8; ++j)
-      temp_in[j] = out[j * 8 + i];
-    vp9_highbd_idct8(temp_in, temp_out, bd);
-    for (j = 0; j < 8; ++j) {
-      dest[j * stride + i] = highbd_clip_pixel_add(
-          dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 5), bd);
-    }
-  }
-}
-
-void vp9_highbd_idct16(const tran_low_t *input, tran_low_t *output, int bd) {
-  tran_low_t step1[16], step2[16];
-  tran_high_t temp1, temp2;
-  (void) bd;
-
-  // stage 1
-  step1[0] = input[0/2];
-  step1[1] = input[16/2];
-  step1[2] = input[8/2];
-  step1[3] = input[24/2];
-  step1[4] = input[4/2];
-  step1[5] = input[20/2];
-  step1[6] = input[12/2];
-  step1[7] = input[28/2];
-  step1[8] = input[2/2];
-  step1[9] = input[18/2];
-  step1[10] = input[10/2];
-  step1[11] = input[26/2];
-  step1[12] = input[6/2];
-  step1[13] = input[22/2];
-  step1[14] = input[14/2];
-  step1[15] = input[30/2];
-
-  // stage 2
-  step2[0] = step1[0];
-  step2[1] = step1[1];
-  step2[2] = step1[2];
-  step2[3] = step1[3];
-  step2[4] = step1[4];
-  step2[5] = step1[5];
-  step2[6] = step1[6];
-  step2[7] = step1[7];
-
-  temp1 = step1[8] * cospi_30_64 - step1[15] * cospi_2_64;
-  temp2 = step1[8] * cospi_2_64 + step1[15] * cospi_30_64;
-  step2[8] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[15] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  temp1 = step1[9] * cospi_14_64 - step1[14] * cospi_18_64;
-  temp2 = step1[9] * cospi_18_64 + step1[14] * cospi_14_64;
-  step2[9] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[14] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  temp1 = step1[10] * cospi_22_64 - step1[13] * cospi_10_64;
-  temp2 = step1[10] * cospi_10_64 + step1[13] * cospi_22_64;
-  step2[10] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[13] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  temp1 = step1[11] * cospi_6_64 - step1[12] * cospi_26_64;
-  temp2 = step1[11] * cospi_26_64 + step1[12] * cospi_6_64;
-  step2[11] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[12] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  // stage 3
-  step1[0] = step2[0];
-  step1[1] = step2[1];
-  step1[2] = step2[2];
-  step1[3] = step2[3];
-
-  temp1 = step2[4] * cospi_28_64 - step2[7] * cospi_4_64;
-  temp2 = step2[4] * cospi_4_64 + step2[7] * cospi_28_64;
-  step1[4] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[7] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  temp1 = step2[5] * cospi_12_64 - step2[6] * cospi_20_64;
-  temp2 = step2[5] * cospi_20_64 + step2[6] * cospi_12_64;
-  step1[5] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[6] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  step1[8] = WRAPLOW(step2[8] + step2[9], bd);
-  step1[9] = WRAPLOW(step2[8] - step2[9], bd);
-  step1[10] = WRAPLOW(-step2[10] + step2[11], bd);
-  step1[11] = WRAPLOW(step2[10] + step2[11], bd);
-  step1[12] = WRAPLOW(step2[12] + step2[13], bd);
-  step1[13] = WRAPLOW(step2[12] - step2[13], bd);
-  step1[14] = WRAPLOW(-step2[14] + step2[15], bd);
-  step1[15] = WRAPLOW(step2[14] + step2[15], bd);
-
-  // stage 4
-  temp1 = (step1[0] + step1[1]) * cospi_16_64;
-  temp2 = (step1[0] - step1[1]) * cospi_16_64;
-  step2[0] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[1] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  temp1 = step1[2] * cospi_24_64 - step1[3] * cospi_8_64;
-  temp2 = step1[2] * cospi_8_64 + step1[3] * cospi_24_64;
-  step2[2] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[3] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  step2[4] = WRAPLOW(step1[4] + step1[5], bd);
-  step2[5] = WRAPLOW(step1[4] - step1[5], bd);
-  step2[6] = WRAPLOW(-step1[6] + step1[7], bd);
-  step2[7] = WRAPLOW(step1[6] + step1[7], bd);
-
-  step2[8] = step1[8];
-  step2[15] = step1[15];
-  temp1 = -step1[9] * cospi_8_64 + step1[14] * cospi_24_64;
-  temp2 = step1[9] * cospi_24_64 + step1[14] * cospi_8_64;
-  step2[9] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[14] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  temp1 = -step1[10] * cospi_24_64 - step1[13] * cospi_8_64;
-  temp2 = -step1[10] * cospi_8_64 + step1[13] * cospi_24_64;
-  step2[10] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[13] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  step2[11] = step1[11];
-  step2[12] = step1[12];
-
-  // stage 5
-  step1[0] = WRAPLOW(step2[0] + step2[3], bd);
-  step1[1] = WRAPLOW(step2[1] + step2[2], bd);
-  step1[2] = WRAPLOW(step2[1] - step2[2], bd);
-  step1[3] = WRAPLOW(step2[0] - step2[3], bd);
-  step1[4] = step2[4];
-  temp1 = (step2[6] - step2[5]) * cospi_16_64;
-  temp2 = (step2[5] + step2[6]) * cospi_16_64;
-  step1[5] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[6] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  step1[7] = step2[7];
-
-  step1[8] = WRAPLOW(step2[8] + step2[11], bd);
-  step1[9] = WRAPLOW(step2[9] + step2[10], bd);
-  step1[10] = WRAPLOW(step2[9] - step2[10], bd);
-  step1[11] = WRAPLOW(step2[8] - step2[11], bd);
-  step1[12] = WRAPLOW(-step2[12] + step2[15], bd);
-  step1[13] = WRAPLOW(-step2[13] + step2[14], bd);
-  step1[14] = WRAPLOW(step2[13] + step2[14], bd);
-  step1[15] = WRAPLOW(step2[12] + step2[15], bd);
-
-  // stage 6
-  step2[0] = WRAPLOW(step1[0] + step1[7], bd);
-  step2[1] = WRAPLOW(step1[1] + step1[6], bd);
-  step2[2] = WRAPLOW(step1[2] + step1[5], bd);
-  step2[3] = WRAPLOW(step1[3] + step1[4], bd);
-  step2[4] = WRAPLOW(step1[3] - step1[4], bd);
-  step2[5] = WRAPLOW(step1[2] - step1[5], bd);
-  step2[6] = WRAPLOW(step1[1] - step1[6], bd);
-  step2[7] = WRAPLOW(step1[0] - step1[7], bd);
-  step2[8] = step1[8];
-  step2[9] = step1[9];
-  temp1 = (-step1[10] + step1[13]) * cospi_16_64;
-  temp2 = (step1[10] + step1[13]) * cospi_16_64;
-  step2[10] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[13] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  temp1 = (-step1[11] + step1[12]) * cospi_16_64;
-  temp2 = (step1[11] + step1[12]) * cospi_16_64;
-  step2[11] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[12] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  step2[14] = step1[14];
-  step2[15] = step1[15];
-
-  // stage 7
-  output[0] = WRAPLOW(step2[0] + step2[15], bd);
-  output[1] = WRAPLOW(step2[1] + step2[14], bd);
-  output[2] = WRAPLOW(step2[2] + step2[13], bd);
-  output[3] = WRAPLOW(step2[3] + step2[12], bd);
-  output[4] = WRAPLOW(step2[4] + step2[11], bd);
-  output[5] = WRAPLOW(step2[5] + step2[10], bd);
-  output[6] = WRAPLOW(step2[6] + step2[9], bd);
-  output[7] = WRAPLOW(step2[7] + step2[8], bd);
-  output[8] = WRAPLOW(step2[7] - step2[8], bd);
-  output[9] = WRAPLOW(step2[6] - step2[9], bd);
-  output[10] = WRAPLOW(step2[5] - step2[10], bd);
-  output[11] = WRAPLOW(step2[4] - step2[11], bd);
-  output[12] = WRAPLOW(step2[3] - step2[12], bd);
-  output[13] = WRAPLOW(step2[2] - step2[13], bd);
-  output[14] = WRAPLOW(step2[1] - step2[14], bd);
-  output[15] = WRAPLOW(step2[0] - step2[15], bd);
-}
-
-void vp9_highbd_idct16x16_256_add_c(const tran_low_t *input, uint8_t *dest8,
-                                    int stride, int bd) {
-  tran_low_t out[16 * 16];
-  tran_low_t *outptr = out;
-  int i, j;
-  tran_low_t temp_in[16], temp_out[16];
-  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
-
-  // First transform rows.
-  for (i = 0; i < 16; ++i) {
-    vp9_highbd_idct16(input, outptr, bd);
-    input += 16;
-    outptr += 16;
-  }
-
-  // Then transform columns.
-  for (i = 0; i < 16; ++i) {
-    for (j = 0; j < 16; ++j)
-      temp_in[j] = out[j * 16 + i];
-    vp9_highbd_idct16(temp_in, temp_out, bd);
-    for (j = 0; j < 16; ++j) {
-      dest[j * stride + i] = highbd_clip_pixel_add(
-          dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 6), bd);
-    }
-  }
-}
-
-static void highbd_iadst16(const tran_low_t *input, tran_low_t *output,
-                           int bd) {
-  tran_high_t s0, s1, s2, s3, s4, s5, s6, s7, s8;
-  tran_high_t s9, s10, s11, s12, s13, s14, s15;
-
-  tran_low_t x0 = input[15];
-  tran_low_t x1 = input[0];
-  tran_low_t x2 = input[13];
-  tran_low_t x3 = input[2];
-  tran_low_t x4 = input[11];
-  tran_low_t x5 = input[4];
-  tran_low_t x6 = input[9];
-  tran_low_t x7 = input[6];
-  tran_low_t x8 = input[7];
-  tran_low_t x9 = input[8];
-  tran_low_t x10 = input[5];
-  tran_low_t x11 = input[10];
-  tran_low_t x12 = input[3];
-  tran_low_t x13 = input[12];
-  tran_low_t x14 = input[1];
-  tran_low_t x15 = input[14];
-  (void) bd;
-
-  if (!(x0 | x1 | x2 | x3 | x4 | x5 | x6 | x7 | x8
-           | x9 | x10 | x11 | x12 | x13 | x14 | x15)) {
-    memset(output, 0, 16 * sizeof(*output));
-    return;
-  }
-
-  // stage 1
-  s0 = x0 * cospi_1_64  + x1 * cospi_31_64;
-  s1 = x0 * cospi_31_64 - x1 * cospi_1_64;
-  s2 = x2 * cospi_5_64  + x3 * cospi_27_64;
-  s3 = x2 * cospi_27_64 - x3 * cospi_5_64;
-  s4 = x4 * cospi_9_64  + x5 * cospi_23_64;
-  s5 = x4 * cospi_23_64 - x5 * cospi_9_64;
-  s6 = x6 * cospi_13_64 + x7 * cospi_19_64;
-  s7 = x6 * cospi_19_64 - x7 * cospi_13_64;
-  s8 = x8 * cospi_17_64 + x9 * cospi_15_64;
-  s9 = x8 * cospi_15_64 - x9 * cospi_17_64;
-  s10 = x10 * cospi_21_64 + x11 * cospi_11_64;
-  s11 = x10 * cospi_11_64 - x11 * cospi_21_64;
-  s12 = x12 * cospi_25_64 + x13 * cospi_7_64;
-  s13 = x12 * cospi_7_64  - x13 * cospi_25_64;
-  s14 = x14 * cospi_29_64 + x15 * cospi_3_64;
-  s15 = x14 * cospi_3_64  - x15 * cospi_29_64;
-
-  x0 = WRAPLOW(highbd_dct_const_round_shift(s0 + s8, bd), bd);
-  x1 = WRAPLOW(highbd_dct_const_round_shift(s1 + s9, bd), bd);
-  x2 = WRAPLOW(highbd_dct_const_round_shift(s2 + s10, bd), bd);
-  x3 = WRAPLOW(highbd_dct_const_round_shift(s3 + s11, bd), bd);
-  x4 = WRAPLOW(highbd_dct_const_round_shift(s4 + s12, bd), bd);
-  x5 = WRAPLOW(highbd_dct_const_round_shift(s5 + s13, bd), bd);
-  x6 = WRAPLOW(highbd_dct_const_round_shift(s6 + s14, bd), bd);
-  x7 = WRAPLOW(highbd_dct_const_round_shift(s7 + s15, bd), bd);
-  x8  = WRAPLOW(highbd_dct_const_round_shift(s0 - s8, bd), bd);
-  x9  = WRAPLOW(highbd_dct_const_round_shift(s1 - s9, bd), bd);
-  x10 = WRAPLOW(highbd_dct_const_round_shift(s2 - s10, bd), bd);
-  x11 = WRAPLOW(highbd_dct_const_round_shift(s3 - s11, bd), bd);
-  x12 = WRAPLOW(highbd_dct_const_round_shift(s4 - s12, bd), bd);
-  x13 = WRAPLOW(highbd_dct_const_round_shift(s5 - s13, bd), bd);
-  x14 = WRAPLOW(highbd_dct_const_round_shift(s6 - s14, bd), bd);
-  x15 = WRAPLOW(highbd_dct_const_round_shift(s7 - s15, bd), bd);
-
-  // stage 2
-  s0 = x0;
-  s1 = x1;
-  s2 = x2;
-  s3 = x3;
-  s4 = x4;
-  s5 = x5;
-  s6 = x6;
-  s7 = x7;
-  s8 = x8 * cospi_4_64 + x9 * cospi_28_64;
-  s9 = x8 * cospi_28_64 - x9 * cospi_4_64;
-  s10 = x10 * cospi_20_64 + x11 * cospi_12_64;
-  s11 = x10 * cospi_12_64 - x11 * cospi_20_64;
-  s12 = -x12 * cospi_28_64 + x13 * cospi_4_64;
-  s13 = x12 * cospi_4_64 + x13 * cospi_28_64;
-  s14 = -x14 * cospi_12_64 + x15 * cospi_20_64;
-  s15 = x14 * cospi_20_64 + x15 * cospi_12_64;
-
-  x0 = WRAPLOW(s0 + s4, bd);
-  x1 = WRAPLOW(s1 + s5, bd);
-  x2 = WRAPLOW(s2 + s6, bd);
-  x3 = WRAPLOW(s3 + s7, bd);
-  x4 = WRAPLOW(s0 - s4, bd);
-  x5 = WRAPLOW(s1 - s5, bd);
-  x6 = WRAPLOW(s2 - s6, bd);
-  x7 = WRAPLOW(s3 - s7, bd);
-  x8 = WRAPLOW(highbd_dct_const_round_shift(s8 + s12, bd), bd);
-  x9 = WRAPLOW(highbd_dct_const_round_shift(s9 + s13, bd), bd);
-  x10 = WRAPLOW(highbd_dct_const_round_shift(s10 + s14, bd), bd);
-  x11 = WRAPLOW(highbd_dct_const_round_shift(s11 + s15, bd), bd);
-  x12 = WRAPLOW(highbd_dct_const_round_shift(s8 - s12, bd), bd);
-  x13 = WRAPLOW(highbd_dct_const_round_shift(s9 - s13, bd), bd);
-  x14 = WRAPLOW(highbd_dct_const_round_shift(s10 - s14, bd), bd);
-  x15 = WRAPLOW(highbd_dct_const_round_shift(s11 - s15, bd), bd);
-
-  // stage 3
-  s0 = x0;
-  s1 = x1;
-  s2 = x2;
-  s3 = x3;
-  s4 = x4 * cospi_8_64 + x5 * cospi_24_64;
-  s5 = x4 * cospi_24_64 - x5 * cospi_8_64;
-  s6 = -x6 * cospi_24_64 + x7 * cospi_8_64;
-  s7 = x6 * cospi_8_64 + x7 * cospi_24_64;
-  s8 = x8;
-  s9 = x9;
-  s10 = x10;
-  s11 = x11;
-  s12 = x12 * cospi_8_64 + x13 * cospi_24_64;
-  s13 = x12 * cospi_24_64 - x13 * cospi_8_64;
-  s14 = -x14 * cospi_24_64 + x15 * cospi_8_64;
-  s15 = x14 * cospi_8_64 + x15 * cospi_24_64;
-
-  x0 = WRAPLOW(s0 + s2, bd);
-  x1 = WRAPLOW(s1 + s3, bd);
-  x2 = WRAPLOW(s0 - s2, bd);
-  x3 = WRAPLOW(s1 - s3, bd);
-  x4 = WRAPLOW(highbd_dct_const_round_shift(s4 + s6, bd), bd);
-  x5 = WRAPLOW(highbd_dct_const_round_shift(s5 + s7, bd), bd);
-  x6 = WRAPLOW(highbd_dct_const_round_shift(s4 - s6, bd), bd);
-  x7 = WRAPLOW(highbd_dct_const_round_shift(s5 - s7, bd), bd);
-  x8 = WRAPLOW(s8 + s10, bd);
-  x9 = WRAPLOW(s9 + s11, bd);
-  x10 = WRAPLOW(s8 - s10, bd);
-  x11 = WRAPLOW(s9 - s11, bd);
-  x12 = WRAPLOW(highbd_dct_const_round_shift(s12 + s14, bd), bd);
-  x13 = WRAPLOW(highbd_dct_const_round_shift(s13 + s15, bd), bd);
-  x14 = WRAPLOW(highbd_dct_const_round_shift(s12 - s14, bd), bd);
-  x15 = WRAPLOW(highbd_dct_const_round_shift(s13 - s15, bd), bd);
-
-  // stage 4
-  s2 = (- cospi_16_64) * (x2 + x3);
-  s3 = cospi_16_64 * (x2 - x3);
-  s6 = cospi_16_64 * (x6 + x7);
-  s7 = cospi_16_64 * (-x6 + x7);
-  s10 = cospi_16_64 * (x10 + x11);
-  s11 = cospi_16_64 * (-x10 + x11);
-  s14 = (- cospi_16_64) * (x14 + x15);
-  s15 = cospi_16_64 * (x14 - x15);
-
-  x2 = WRAPLOW(highbd_dct_const_round_shift(s2, bd), bd);
-  x3 = WRAPLOW(highbd_dct_const_round_shift(s3, bd), bd);
-  x6 = WRAPLOW(highbd_dct_const_round_shift(s6, bd), bd);
-  x7 = WRAPLOW(highbd_dct_const_round_shift(s7, bd), bd);
-  x10 = WRAPLOW(highbd_dct_const_round_shift(s10, bd), bd);
-  x11 = WRAPLOW(highbd_dct_const_round_shift(s11, bd), bd);
-  x14 = WRAPLOW(highbd_dct_const_round_shift(s14, bd), bd);
-  x15 = WRAPLOW(highbd_dct_const_round_shift(s15, bd), bd);
-
-  output[0] = WRAPLOW(x0, bd);
-  output[1] = WRAPLOW(-x8, bd);
-  output[2] = WRAPLOW(x12, bd);
-  output[3] = WRAPLOW(-x4, bd);
-  output[4] = WRAPLOW(x6, bd);
-  output[5] = WRAPLOW(x14, bd);
-  output[6] = WRAPLOW(x10, bd);
-  output[7] = WRAPLOW(x2, bd);
-  output[8] = WRAPLOW(x3, bd);
-  output[9] = WRAPLOW(x11, bd);
-  output[10] = WRAPLOW(x15, bd);
-  output[11] = WRAPLOW(x7, bd);
-  output[12] = WRAPLOW(x5, bd);
-  output[13] = WRAPLOW(-x13, bd);
-  output[14] = WRAPLOW(x9, bd);
-  output[15] = WRAPLOW(-x1, bd);
-}
-
 static const highbd_transform_2d HIGH_IHT_16[] = {
-  { vp9_highbd_idct16,  vp9_highbd_idct16  },  // DCT_DCT  = 0
-  { highbd_iadst16, vp9_highbd_idct16  },  // ADST_DCT = 1
-  { vp9_highbd_idct16,  highbd_iadst16 },  // DCT_ADST = 2
-  { highbd_iadst16, highbd_iadst16 }   // ADST_ADST = 3
+  { vp9_highbd_idct16_c,  vp9_highbd_idct16_c  },  // DCT_DCT  = 0
+  { highbd_iadst16_c, vp9_highbd_idct16_c  },  // ADST_DCT = 1
+  { vp9_highbd_idct16_c,  highbd_iadst16_c },  // DCT_ADST = 2
+  { highbd_iadst16_c, highbd_iadst16_c }   // ADST_ADST = 3
 };
 
 void vp9_highbd_iht16x16_256_add_c(const tran_low_t *input, uint8_t *dest8,
@@ -2277,504 +311,6 @@ void vp9_highbd_iht16x16_256_add_c(const tran_low_t *input, uint8_t *dest8,
   }
 }
 
-void vp9_highbd_idct16x16_10_add_c(const tran_low_t *input, uint8_t *dest8,
-                                   int stride, int bd) {
-  tran_low_t out[16 * 16] = { 0 };
-  tran_low_t *outptr = out;
-  int i, j;
-  tran_low_t temp_in[16], temp_out[16];
-  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
-
-  // First transform rows. Since all non-zero dct coefficients are in
-  // upper-left 4x4 area, we only need to calculate first 4 rows here.
-  for (i = 0; i < 4; ++i) {
-    vp9_highbd_idct16(input, outptr, bd);
-    input += 16;
-    outptr += 16;
-  }
-
-  // Then transform columns.
-  for (i = 0; i < 16; ++i) {
-    for (j = 0; j < 16; ++j)
-      temp_in[j] = out[j*16 + i];
-    vp9_highbd_idct16(temp_in, temp_out, bd);
-    for (j = 0; j < 16; ++j) {
-      dest[j * stride + i] = highbd_clip_pixel_add(
-          dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 6), bd);
-    }
-  }
-}
-
-void vp9_highbd_idct16x16_1_add_c(const tran_low_t *input, uint8_t *dest8,
-                                  int stride, int bd) {
-  int i, j;
-  tran_high_t a1;
-  tran_low_t out = WRAPLOW(
-      highbd_dct_const_round_shift(input[0] * cospi_16_64, bd), bd);
-  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
-
-  out = WRAPLOW(highbd_dct_const_round_shift(out * cospi_16_64, bd), bd);
-  a1 = ROUND_POWER_OF_TWO(out, 6);
-  for (j = 0; j < 16; ++j) {
-    for (i = 0; i < 16; ++i)
-      dest[i] = highbd_clip_pixel_add(dest[i], a1, bd);
-    dest += stride;
-  }
-}
-
-static void highbd_idct32(const tran_low_t *input, tran_low_t *output, int bd) {
-  tran_low_t step1[32], step2[32];
-  tran_high_t temp1, temp2;
-  (void) bd;
-
-  // stage 1
-  step1[0] = input[0];
-  step1[1] = input[16];
-  step1[2] = input[8];
-  step1[3] = input[24];
-  step1[4] = input[4];
-  step1[5] = input[20];
-  step1[6] = input[12];
-  step1[7] = input[28];
-  step1[8] = input[2];
-  step1[9] = input[18];
-  step1[10] = input[10];
-  step1[11] = input[26];
-  step1[12] = input[6];
-  step1[13] = input[22];
-  step1[14] = input[14];
-  step1[15] = input[30];
-
-  temp1 = input[1] * cospi_31_64 - input[31] * cospi_1_64;
-  temp2 = input[1] * cospi_1_64 + input[31] * cospi_31_64;
-  step1[16] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[31] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  temp1 = input[17] * cospi_15_64 - input[15] * cospi_17_64;
-  temp2 = input[17] * cospi_17_64 + input[15] * cospi_15_64;
-  step1[17] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[30] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  temp1 = input[9] * cospi_23_64 - input[23] * cospi_9_64;
-  temp2 = input[9] * cospi_9_64 + input[23] * cospi_23_64;
-  step1[18] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[29] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  temp1 = input[25] * cospi_7_64 - input[7] * cospi_25_64;
-  temp2 = input[25] * cospi_25_64 + input[7] * cospi_7_64;
-  step1[19] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[28] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  temp1 = input[5] * cospi_27_64 - input[27] * cospi_5_64;
-  temp2 = input[5] * cospi_5_64 + input[27] * cospi_27_64;
-  step1[20] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[27] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  temp1 = input[21] * cospi_11_64 - input[11] * cospi_21_64;
-  temp2 = input[21] * cospi_21_64 + input[11] * cospi_11_64;
-  step1[21] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[26] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  temp1 = input[13] * cospi_19_64 - input[19] * cospi_13_64;
-  temp2 = input[13] * cospi_13_64 + input[19] * cospi_19_64;
-  step1[22] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[25] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  temp1 = input[29] * cospi_3_64 - input[3] * cospi_29_64;
-  temp2 = input[29] * cospi_29_64 + input[3] * cospi_3_64;
-  step1[23] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[24] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  // stage 2
-  step2[0] = step1[0];
-  step2[1] = step1[1];
-  step2[2] = step1[2];
-  step2[3] = step1[3];
-  step2[4] = step1[4];
-  step2[5] = step1[5];
-  step2[6] = step1[6];
-  step2[7] = step1[7];
-
-  temp1 = step1[8] * cospi_30_64 - step1[15] * cospi_2_64;
-  temp2 = step1[8] * cospi_2_64 + step1[15] * cospi_30_64;
-  step2[8] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[15] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  temp1 = step1[9] * cospi_14_64 - step1[14] * cospi_18_64;
-  temp2 = step1[9] * cospi_18_64 + step1[14] * cospi_14_64;
-  step2[9] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[14] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  temp1 = step1[10] * cospi_22_64 - step1[13] * cospi_10_64;
-  temp2 = step1[10] * cospi_10_64 + step1[13] * cospi_22_64;
-  step2[10] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[13] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  temp1 = step1[11] * cospi_6_64 - step1[12] * cospi_26_64;
-  temp2 = step1[11] * cospi_26_64 + step1[12] * cospi_6_64;
-  step2[11] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[12] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  step2[16] = WRAPLOW(step1[16] + step1[17], bd);
-  step2[17] = WRAPLOW(step1[16] - step1[17], bd);
-  step2[18] = WRAPLOW(-step1[18] + step1[19], bd);
-  step2[19] = WRAPLOW(step1[18] + step1[19], bd);
-  step2[20] = WRAPLOW(step1[20] + step1[21], bd);
-  step2[21] = WRAPLOW(step1[20] - step1[21], bd);
-  step2[22] = WRAPLOW(-step1[22] + step1[23], bd);
-  step2[23] = WRAPLOW(step1[22] + step1[23], bd);
-  step2[24] = WRAPLOW(step1[24] + step1[25], bd);
-  step2[25] = WRAPLOW(step1[24] - step1[25], bd);
-  step2[26] = WRAPLOW(-step1[26] + step1[27], bd);
-  step2[27] = WRAPLOW(step1[26] + step1[27], bd);
-  step2[28] = WRAPLOW(step1[28] + step1[29], bd);
-  step2[29] = WRAPLOW(step1[28] - step1[29], bd);
-  step2[30] = WRAPLOW(-step1[30] + step1[31], bd);
-  step2[31] = WRAPLOW(step1[30] + step1[31], bd);
-
-  // stage 3
-  step1[0] = step2[0];
-  step1[1] = step2[1];
-  step1[2] = step2[2];
-  step1[3] = step2[3];
-
-  temp1 = step2[4] * cospi_28_64 - step2[7] * cospi_4_64;
-  temp2 = step2[4] * cospi_4_64 + step2[7] * cospi_28_64;
-  step1[4] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[7] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  temp1 = step2[5] * cospi_12_64 - step2[6] * cospi_20_64;
-  temp2 = step2[5] * cospi_20_64 + step2[6] * cospi_12_64;
-  step1[5] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[6] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-
-  step1[8] = WRAPLOW(step2[8] + step2[9], bd);
-  step1[9] = WRAPLOW(step2[8] - step2[9], bd);
-  step1[10] = WRAPLOW(-step2[10] + step2[11], bd);
-  step1[11] = WRAPLOW(step2[10] + step2[11], bd);
-  step1[12] = WRAPLOW(step2[12] + step2[13], bd);
-  step1[13] = WRAPLOW(step2[12] - step2[13], bd);
-  step1[14] = WRAPLOW(-step2[14] + step2[15], bd);
-  step1[15] = WRAPLOW(step2[14] + step2[15], bd);
-
-  step1[16] = step2[16];
-  step1[31] = step2[31];
-  temp1 = -step2[17] * cospi_4_64 + step2[30] * cospi_28_64;
-  temp2 = step2[17] * cospi_28_64 + step2[30] * cospi_4_64;
-  step1[17] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[30] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  temp1 = -step2[18] * cospi_28_64 - step2[29] * cospi_4_64;
-  temp2 = -step2[18] * cospi_4_64 + step2[29] * cospi_28_64;
-  step1[18] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[29] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  step1[19] = step2[19];
-  step1[20] = step2[20];
-  temp1 = -step2[21] * cospi_20_64 + step2[26] * cospi_12_64;
-  temp2 = step2[21] * cospi_12_64 + step2[26] * cospi_20_64;
-  step1[21] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[26] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  temp1 = -step2[22] * cospi_12_64 - step2[25] * cospi_20_64;
-  temp2 = -step2[22] * cospi_20_64 + step2[25] * cospi_12_64;
-  step1[22] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[25] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  step1[23] = step2[23];
-  step1[24] = step2[24];
-  step1[27] = step2[27];
-  step1[28] = step2[28];
-
-  // stage 4
-  temp1 = (step1[0] + step1[1]) * cospi_16_64;
-  temp2 = (step1[0] - step1[1]) * cospi_16_64;
-  step2[0] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[1] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  temp1 = step1[2] * cospi_24_64 - step1[3] * cospi_8_64;
-  temp2 = step1[2] * cospi_8_64 + step1[3] * cospi_24_64;
-  step2[2] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[3] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  step2[4] = WRAPLOW(step1[4] + step1[5], bd);
-  step2[5] = WRAPLOW(step1[4] - step1[5], bd);
-  step2[6] = WRAPLOW(-step1[6] + step1[7], bd);
-  step2[7] = WRAPLOW(step1[6] + step1[7], bd);
-
-  step2[8] = step1[8];
-  step2[15] = step1[15];
-  temp1 = -step1[9] * cospi_8_64 + step1[14] * cospi_24_64;
-  temp2 = step1[9] * cospi_24_64 + step1[14] * cospi_8_64;
-  step2[9] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[14] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  temp1 = -step1[10] * cospi_24_64 - step1[13] * cospi_8_64;
-  temp2 = -step1[10] * cospi_8_64 + step1[13] * cospi_24_64;
-  step2[10] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[13] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  step2[11] = step1[11];
-  step2[12] = step1[12];
-
-  step2[16] = WRAPLOW(step1[16] + step1[19], bd);
-  step2[17] = WRAPLOW(step1[17] + step1[18], bd);
-  step2[18] = WRAPLOW(step1[17] - step1[18], bd);
-  step2[19] = WRAPLOW(step1[16] - step1[19], bd);
-  step2[20] = WRAPLOW(-step1[20] + step1[23], bd);
-  step2[21] = WRAPLOW(-step1[21] + step1[22], bd);
-  step2[22] = WRAPLOW(step1[21] + step1[22], bd);
-  step2[23] = WRAPLOW(step1[20] + step1[23], bd);
-
-  step2[24] = WRAPLOW(step1[24] + step1[27], bd);
-  step2[25] = WRAPLOW(step1[25] + step1[26], bd);
-  step2[26] = WRAPLOW(step1[25] - step1[26], bd);
-  step2[27] = WRAPLOW(step1[24] - step1[27], bd);
-  step2[28] = WRAPLOW(-step1[28] + step1[31], bd);
-  step2[29] = WRAPLOW(-step1[29] + step1[30], bd);
-  step2[30] = WRAPLOW(step1[29] + step1[30], bd);
-  step2[31] = WRAPLOW(step1[28] + step1[31], bd);
-
-  // stage 5
-  step1[0] = WRAPLOW(step2[0] + step2[3], bd);
-  step1[1] = WRAPLOW(step2[1] + step2[2], bd);
-  step1[2] = WRAPLOW(step2[1] - step2[2], bd);
-  step1[3] = WRAPLOW(step2[0] - step2[3], bd);
-  step1[4] = step2[4];
-  temp1 = (step2[6] - step2[5]) * cospi_16_64;
-  temp2 = (step2[5] + step2[6]) * cospi_16_64;
-  step1[5] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[6] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  step1[7] = step2[7];
-
-  step1[8] = WRAPLOW(step2[8] + step2[11], bd);
-  step1[9] = WRAPLOW(step2[9] + step2[10], bd);
-  step1[10] = WRAPLOW(step2[9] - step2[10], bd);
-  step1[11] = WRAPLOW(step2[8] - step2[11], bd);
-  step1[12] = WRAPLOW(-step2[12] + step2[15], bd);
-  step1[13] = WRAPLOW(-step2[13] + step2[14], bd);
-  step1[14] = WRAPLOW(step2[13] + step2[14], bd);
-  step1[15] = WRAPLOW(step2[12] + step2[15], bd);
-
-  step1[16] = step2[16];
-  step1[17] = step2[17];
-  temp1 = -step2[18] * cospi_8_64 + step2[29] * cospi_24_64;
-  temp2 = step2[18] * cospi_24_64 + step2[29] * cospi_8_64;
-  step1[18] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[29] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  temp1 = -step2[19] * cospi_8_64 + step2[28] * cospi_24_64;
-  temp2 = step2[19] * cospi_24_64 + step2[28] * cospi_8_64;
-  step1[19] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[28] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  temp1 = -step2[20] * cospi_24_64 - step2[27] * cospi_8_64;
-  temp2 = -step2[20] * cospi_8_64 + step2[27] * cospi_24_64;
-  step1[20] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[27] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  temp1 = -step2[21] * cospi_24_64 - step2[26] * cospi_8_64;
-  temp2 = -step2[21] * cospi_8_64 + step2[26] * cospi_24_64;
-  step1[21] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[26] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  step1[22] = step2[22];
-  step1[23] = step2[23];
-  step1[24] = step2[24];
-  step1[25] = step2[25];
-  step1[30] = step2[30];
-  step1[31] = step2[31];
-
-  // stage 6
-  step2[0] = WRAPLOW(step1[0] + step1[7], bd);
-  step2[1] = WRAPLOW(step1[1] + step1[6], bd);
-  step2[2] = WRAPLOW(step1[2] + step1[5], bd);
-  step2[3] = WRAPLOW(step1[3] + step1[4], bd);
-  step2[4] = WRAPLOW(step1[3] - step1[4], bd);
-  step2[5] = WRAPLOW(step1[2] - step1[5], bd);
-  step2[6] = WRAPLOW(step1[1] - step1[6], bd);
-  step2[7] = WRAPLOW(step1[0] - step1[7], bd);
-  step2[8] = step1[8];
-  step2[9] = step1[9];
-  temp1 = (-step1[10] + step1[13]) * cospi_16_64;
-  temp2 = (step1[10] + step1[13]) * cospi_16_64;
-  step2[10] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[13] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  temp1 = (-step1[11] + step1[12]) * cospi_16_64;
-  temp2 = (step1[11] + step1[12]) * cospi_16_64;
-  step2[11] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step2[12] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  step2[14] = step1[14];
-  step2[15] = step1[15];
-
-  step2[16] = WRAPLOW(step1[16] + step1[23], bd);
-  step2[17] = WRAPLOW(step1[17] + step1[22], bd);
-  step2[18] = WRAPLOW(step1[18] + step1[21], bd);
-  step2[19] = WRAPLOW(step1[19] + step1[20], bd);
-  step2[20] = WRAPLOW(step1[19] - step1[20], bd);
-  step2[21] = WRAPLOW(step1[18] - step1[21], bd);
-  step2[22] = WRAPLOW(step1[17] - step1[22], bd);
-  step2[23] = WRAPLOW(step1[16] - step1[23], bd);
-
-  step2[24] = WRAPLOW(-step1[24] + step1[31], bd);
-  step2[25] = WRAPLOW(-step1[25] + step1[30], bd);
-  step2[26] = WRAPLOW(-step1[26] + step1[29], bd);
-  step2[27] = WRAPLOW(-step1[27] + step1[28], bd);
-  step2[28] = WRAPLOW(step1[27] + step1[28], bd);
-  step2[29] = WRAPLOW(step1[26] + step1[29], bd);
-  step2[30] = WRAPLOW(step1[25] + step1[30], bd);
-  step2[31] = WRAPLOW(step1[24] + step1[31], bd);
-
-  // stage 7
-  step1[0] = WRAPLOW(step2[0] + step2[15], bd);
-  step1[1] = WRAPLOW(step2[1] + step2[14], bd);
-  step1[2] = WRAPLOW(step2[2] + step2[13], bd);
-  step1[3] = WRAPLOW(step2[3] + step2[12], bd);
-  step1[4] = WRAPLOW(step2[4] + step2[11], bd);
-  step1[5] = WRAPLOW(step2[5] + step2[10], bd);
-  step1[6] = WRAPLOW(step2[6] + step2[9], bd);
-  step1[7] = WRAPLOW(step2[7] + step2[8], bd);
-  step1[8] = WRAPLOW(step2[7] - step2[8], bd);
-  step1[9] = WRAPLOW(step2[6] - step2[9], bd);
-  step1[10] = WRAPLOW(step2[5] - step2[10], bd);
-  step1[11] = WRAPLOW(step2[4] - step2[11], bd);
-  step1[12] = WRAPLOW(step2[3] - step2[12], bd);
-  step1[13] = WRAPLOW(step2[2] - step2[13], bd);
-  step1[14] = WRAPLOW(step2[1] - step2[14], bd);
-  step1[15] = WRAPLOW(step2[0] - step2[15], bd);
-
-  step1[16] = step2[16];
-  step1[17] = step2[17];
-  step1[18] = step2[18];
-  step1[19] = step2[19];
-  temp1 = (-step2[20] + step2[27]) * cospi_16_64;
-  temp2 = (step2[20] + step2[27]) * cospi_16_64;
-  step1[20] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[27] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  temp1 = (-step2[21] + step2[26]) * cospi_16_64;
-  temp2 = (step2[21] + step2[26]) * cospi_16_64;
-  step1[21] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[26] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  temp1 = (-step2[22] + step2[25]) * cospi_16_64;
-  temp2 = (step2[22] + step2[25]) * cospi_16_64;
-  step1[22] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[25] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  temp1 = (-step2[23] + step2[24]) * cospi_16_64;
-  temp2 = (step2[23] + step2[24]) * cospi_16_64;
-  step1[23] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
-  step1[24] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
-  step1[28] = step2[28];
-  step1[29] = step2[29];
-  step1[30] = step2[30];
-  step1[31] = step2[31];
-
-  // final stage
-  output[0] = WRAPLOW(step1[0] + step1[31], bd);
-  output[1] = WRAPLOW(step1[1] + step1[30], bd);
-  output[2] = WRAPLOW(step1[2] + step1[29], bd);
-  output[3] = WRAPLOW(step1[3] + step1[28], bd);
-  output[4] = WRAPLOW(step1[4] + step1[27], bd);
-  output[5] = WRAPLOW(step1[5] + step1[26], bd);
-  output[6] = WRAPLOW(step1[6] + step1[25], bd);
-  output[7] = WRAPLOW(step1[7] + step1[24], bd);
-  output[8] = WRAPLOW(step1[8] + step1[23], bd);
-  output[9] = WRAPLOW(step1[9] + step1[22], bd);
-  output[10] = WRAPLOW(step1[10] + step1[21], bd);
-  output[11] = WRAPLOW(step1[11] + step1[20], bd);
-  output[12] = WRAPLOW(step1[12] + step1[19], bd);
-  output[13] = WRAPLOW(step1[13] + step1[18], bd);
-  output[14] = WRAPLOW(step1[14] + step1[17], bd);
-  output[15] = WRAPLOW(step1[15] + step1[16], bd);
-  output[16] = WRAPLOW(step1[15] - step1[16], bd);
-  output[17] = WRAPLOW(step1[14] - step1[17], bd);
-  output[18] = WRAPLOW(step1[13] - step1[18], bd);
-  output[19] = WRAPLOW(step1[12] - step1[19], bd);
-  output[20] = WRAPLOW(step1[11] - step1[20], bd);
-  output[21] = WRAPLOW(step1[10] - step1[21], bd);
-  output[22] = WRAPLOW(step1[9] - step1[22], bd);
-  output[23] = WRAPLOW(step1[8] - step1[23], bd);
-  output[24] = WRAPLOW(step1[7] - step1[24], bd);
-  output[25] = WRAPLOW(step1[6] - step1[25], bd);
-  output[26] = WRAPLOW(step1[5] - step1[26], bd);
-  output[27] = WRAPLOW(step1[4] - step1[27], bd);
-  output[28] = WRAPLOW(step1[3] - step1[28], bd);
-  output[29] = WRAPLOW(step1[2] - step1[29], bd);
-  output[30] = WRAPLOW(step1[1] - step1[30], bd);
-  output[31] = WRAPLOW(step1[0] - step1[31], bd);
-}
-
-void vp9_highbd_idct32x32_1024_add_c(const tran_low_t *input, uint8_t *dest8,
-                                     int stride, int bd) {
-  tran_low_t out[32 * 32];
-  tran_low_t *outptr = out;
-  int i, j;
-  tran_low_t temp_in[32], temp_out[32];
-  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
-
-  // Rows
-  for (i = 0; i < 32; ++i) {
-    tran_low_t zero_coeff[16];
-    for (j = 0; j < 16; ++j)
-      zero_coeff[j] = input[2 * j] | input[2 * j + 1];
-    for (j = 0; j < 8; ++j)
-      zero_coeff[j] = zero_coeff[2 * j] | zero_coeff[2 * j + 1];
-    for (j = 0; j < 4; ++j)
-      zero_coeff[j] = zero_coeff[2 * j] | zero_coeff[2 * j + 1];
-    for (j = 0; j < 2; ++j)
-      zero_coeff[j] = zero_coeff[2 * j] | zero_coeff[2 * j + 1];
-
-    if (zero_coeff[0] | zero_coeff[1])
-      highbd_idct32(input, outptr, bd);
-    else
-      memset(outptr, 0, sizeof(tran_low_t) * 32);
-    input += 32;
-    outptr += 32;
-  }
-
-  // Columns
-  for (i = 0; i < 32; ++i) {
-    for (j = 0; j < 32; ++j)
-      temp_in[j] = out[j * 32 + i];
-    highbd_idct32(temp_in, temp_out, bd);
-    for (j = 0; j < 32; ++j) {
-      dest[j * stride + i] = highbd_clip_pixel_add(
-          dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 6), bd);
-    }
-  }
-}
-
-void vp9_highbd_idct32x32_34_add_c(const tran_low_t *input, uint8_t *dest8,
-                                   int stride, int bd) {
-  tran_low_t out[32 * 32] = {0};
-  tran_low_t *outptr = out;
-  int i, j;
-  tran_low_t temp_in[32], temp_out[32];
-  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
-
-  // Rows
-  // Only upper-left 8x8 has non-zero coeff.
-  for (i = 0; i < 8; ++i) {
-    highbd_idct32(input, outptr, bd);
-    input += 32;
-    outptr += 32;
-  }
-  // Columns
-  for (i = 0; i < 32; ++i) {
-    for (j = 0; j < 32; ++j)
-      temp_in[j] = out[j * 32 + i];
-    highbd_idct32(temp_in, temp_out, bd);
-    for (j = 0; j < 32; ++j) {
-      dest[j * stride + i] = highbd_clip_pixel_add(
-          dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 6), bd);
-    }
-  }
-}
-
-void vp9_highbd_idct32x32_1_add_c(const tran_low_t *input, uint8_t *dest8,
-                                  int stride, int bd) {
-  int i, j;
-  int a1;
-  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
-
-  tran_low_t out = WRAPLOW(
-      highbd_dct_const_round_shift(input[0] * cospi_16_64, bd), bd);
-  out = WRAPLOW(highbd_dct_const_round_shift(out * cospi_16_64, bd), bd);
-  a1 = ROUND_POWER_OF_TWO(out, 6);
-
-  for (j = 0; j < 32; ++j) {
-    for (i = 0; i < 32; ++i)
-      dest[i] = highbd_clip_pixel_add(dest[i], a1, bd);
-    dest += stride;
-  }
-}
-
 // idct
 void vp9_highbd_idct4x4_add(const tran_low_t *input, uint8_t *dest, int stride,
                             int eob, int bd) {
diff --git a/vp9/common/vp9_idct.h b/vp9/common/vp9_idct.h
index 1a4ea2f04..7a7dc1d64 100644
--- a/vp9/common/vp9_idct.h
+++ b/vp9/common/vp9_idct.h
@@ -14,63 +14,16 @@
 #include <assert.h>
 
 #include "./vpx_config.h"
-#include "vpx_dsp/txfm_common.h"
-#if CONFIG_VP9_HIGHBITDEPTH
-#include "vpx_dsp/vpx_dsp_common.h"
-#endif  // CONFIG_VP9_HIGHBITDEPTH
-#include "vpx_ports/mem.h"
 #include "vp9/common/vp9_common.h"
 #include "vp9/common/vp9_enums.h"
+#include "vpx_dsp/inv_txfm.h"
+#include "vpx_dsp/txfm_common.h"
+#include "vpx_ports/mem.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-static INLINE tran_low_t check_range(tran_high_t input) {
-#if CONFIG_COEFFICIENT_RANGE_CHECKING
-  // For valid VP9 input streams, intermediate stage coefficients should always
-  // stay within the range of a signed 16 bit integer. Coefficients can go out
-  // of this range for invalid/corrupt VP9 streams. However, strictly checking
-  // this range for every intermediate coefficient can burdensome for a decoder,
-  // therefore the following assertion is only enabled when configured with
-  // --enable-coefficient-range-checking.
-  assert(INT16_MIN <= input);
-  assert(input <= INT16_MAX);
-#endif  // CONFIG_COEFFICIENT_RANGE_CHECKING
-  return (tran_low_t)input;
-}
-
-static INLINE tran_low_t dct_const_round_shift(tran_high_t input) {
-  tran_high_t rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS);
-  return check_range(rv);
-}
-
-#if CONFIG_VP9_HIGHBITDEPTH
-static INLINE tran_low_t highbd_check_range(tran_high_t input,
-                                            int bd) {
-#if CONFIG_COEFFICIENT_RANGE_CHECKING
-  // For valid highbitdepth VP9 streams, intermediate stage coefficients will
-  // stay within the ranges:
-  // - 8 bit: signed 16 bit integer
-  // - 10 bit: signed 18 bit integer
-  // - 12 bit: signed 20 bit integer
-  const int32_t int_max = (1 << (7 + bd)) - 1;
-  const int32_t int_min = -int_max - 1;
-  assert(int_min <= input);
-  assert(input <= int_max);
-  (void) int_min;
-#endif  // CONFIG_COEFFICIENT_RANGE_CHECKING
-  (void) bd;
-  return (tran_low_t)input;
-}
-
-static INLINE tran_low_t highbd_dct_const_round_shift(tran_high_t input,
-                                                      int bd) {
-  tran_high_t rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS);
-  return highbd_check_range(rv, bd);
-}
-#endif  // CONFIG_VP9_HIGHBITDEPTH
-
 typedef void (*transform_1d)(const tran_low_t*, tran_low_t*);
 
 typedef struct {
@@ -85,28 +38,6 @@ typedef struct {
 } highbd_transform_2d;
 #endif  // CONFIG_VP9_HIGHBITDEPTH
 
-#if CONFIG_EMULATE_HARDWARE
-// When CONFIG_EMULATE_HARDWARE is 1 the transform performs a
-// non-normative method to handle overflows. A stream that causes
-// overflows  in the inverse transform is considered invalid in VP9,
-// and a hardware implementer is free to choose any reasonable
-// method to handle overflows. However to aid in hardware
-// verification they can use a specific implementation of the
-// WRAPLOW() macro below that is identical to their intended
-// hardware implementation (and also use configure options to trigger
-// the C-implementation of the transform).
-//
-// The particular WRAPLOW implementation below performs strict
-// overflow wrapping to match common hardware implementations.
-// bd of 8 uses trans_low with 16bits, need to remove 16bits
-// bd of 10 uses trans_low with 18bits, need to remove 14bits
-// bd of 12 uses trans_low with 20bits, need to remove 12bits
-// bd of x uses trans_low with 8+x bits, need to remove 24-x bits
-#define WRAPLOW(x, bd) ((((int32_t)(x)) << (24 - bd)) >> (24 - bd))
-#else
-#define WRAPLOW(x, bd) ((int32_t)(x))
-#endif  // CONFIG_EMULATE_HARDWARE
-
 void vp9_iwht4x4_add(const tran_low_t *input, uint8_t *dest, int stride,
                      int eob);
 void vp9_idct4x4_add(const tran_low_t *input, uint8_t *dest, int stride,
@@ -126,9 +57,6 @@ void vp9_iht16x16_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest,
                       int stride, int eob);
 
 #if CONFIG_VP9_HIGHBITDEPTH
-void vp9_highbd_idct4(const tran_low_t *input, tran_low_t *output, int bd);
-void vp9_highbd_idct8(const tran_low_t *input, tran_low_t *output, int bd);
-void vp9_highbd_idct16(const tran_low_t *input, tran_low_t *output, int bd);
 void vp9_highbd_iwht4x4_add(const tran_low_t *input, uint8_t *dest, int stride,
                             int eob, int bd);
 void vp9_highbd_idct4x4_add(const tran_low_t *input, uint8_t *dest, int stride,
@@ -145,11 +73,6 @@ void vp9_highbd_iht8x8_add(TX_TYPE tx_type, const tran_low_t *input,
                            uint8_t *dest, int stride, int eob, int bd);
 void vp9_highbd_iht16x16_add(TX_TYPE tx_type, const tran_low_t *input,
                              uint8_t *dest, int stride, int eob, int bd);
-static INLINE uint16_t highbd_clip_pixel_add(uint16_t dest, tran_high_t trans,
-                                             int bd) {
-  trans = WRAPLOW(trans, bd);
-  return clip_pixel_highbd(WRAPLOW(dest + trans, bd), bd);
-}
 #endif  // CONFIG_VP9_HIGHBITDEPTH
 #ifdef __cplusplus
 }  // extern "C"
diff --git a/vp9/common/vp9_rtcd_defs.pl b/vp9/common/vp9_rtcd_defs.pl
index 883733f55..c1731012f 100644
--- a/vp9/common/vp9_rtcd_defs.pl
+++ b/vp9/common/vp9_rtcd_defs.pl
@@ -87,39 +87,6 @@ specialize qw/vp9_filter_by_weight8x8 sse2 msa/;
 if (vpx_config("CONFIG_VP9_HIGHBITDEPTH") eq "yes") {
   # Note as optimized versions of these functions are added we need to add a check to ensure
   # that when CONFIG_EMULATE_HARDWARE is on, it defaults to the C versions only.
-  add_proto qw/void vp9_idct4x4_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-  specialize qw/vp9_idct4x4_1_add/;
-
-  add_proto qw/void vp9_idct4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-  specialize qw/vp9_idct4x4_16_add/;
-
-  add_proto qw/void vp9_idct8x8_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-  specialize qw/vp9_idct8x8_1_add/;
-
-  add_proto qw/void vp9_idct8x8_64_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-  specialize qw/vp9_idct8x8_64_add/;
-
-  add_proto qw/void vp9_idct8x8_12_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-  specialize qw/vp9_idct8x8_12_add/;
-
-  add_proto qw/void vp9_idct16x16_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-  specialize qw/vp9_idct16x16_1_add/;
-
-  add_proto qw/void vp9_idct16x16_256_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-  specialize qw/vp9_idct16x16_256_add/;
-
-  add_proto qw/void vp9_idct16x16_10_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-  specialize qw/vp9_idct16x16_10_add/;
-
-  add_proto qw/void vp9_idct32x32_1024_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-  specialize qw/vp9_idct32x32_1024_add/;
-
-  add_proto qw/void vp9_idct32x32_34_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-  specialize qw/vp9_idct32x32_34_add/;
-
-  add_proto qw/void vp9_idct32x32_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-  specialize qw/vp9_idct32x32_1_add/;
-
   add_proto qw/void vp9_iht4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int tx_type";
   specialize qw/vp9_iht4x4_16_add/;
 
@@ -128,51 +95,9 @@ if (vpx_config("CONFIG_VP9_HIGHBITDEPTH") eq "yes") {
 
   add_proto qw/void vp9_iht16x16_256_add/, "const tran_low_t *input, uint8_t *output, int pitch, int tx_type";
   specialize qw/vp9_iht16x16_256_add/;
-
-  # dct and add
-
-  add_proto qw/void vp9_iwht4x4_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-  specialize qw/vp9_iwht4x4_1_add/;
-
-  add_proto qw/void vp9_iwht4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-  specialize qw/vp9_iwht4x4_16_add/;
-
 } else {
   # Force C versions if CONFIG_EMULATE_HARDWARE is 1
   if (vpx_config("CONFIG_EMULATE_HARDWARE") eq "yes") {
-    add_proto qw/void vp9_idct4x4_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct4x4_1_add/;
-
-    add_proto qw/void vp9_idct4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct4x4_16_add/;
-
-    add_proto qw/void vp9_idct8x8_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct8x8_1_add/;
-
-    add_proto qw/void vp9_idct8x8_64_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct8x8_64_add/;
-
-    add_proto qw/void vp9_idct8x8_12_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct8x8_12_add/;
-
-    add_proto qw/void vp9_idct16x16_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct16x16_1_add/;
-
-    add_proto qw/void vp9_idct16x16_256_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct16x16_256_add/;
-
-    add_proto qw/void vp9_idct16x16_10_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct16x16_10_add/;
-
-    add_proto qw/void vp9_idct32x32_1024_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct32x32_1024_add/;
-
-    add_proto qw/void vp9_idct32x32_34_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct32x32_34_add/;
-
-    add_proto qw/void vp9_idct32x32_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct32x32_1_add/;
-
     add_proto qw/void vp9_iht4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int tx_type";
     specialize qw/vp9_iht4x4_16_add/;
 
@@ -181,50 +106,7 @@ if (vpx_config("CONFIG_VP9_HIGHBITDEPTH") eq "yes") {
 
     add_proto qw/void vp9_iht16x16_256_add/, "const tran_low_t *input, uint8_t *output, int pitch, int tx_type";
     specialize qw/vp9_iht16x16_256_add/;
-
-    # dct and add
-
-    add_proto qw/void vp9_iwht4x4_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_iwht4x4_1_add/;
-
-    add_proto qw/void vp9_iwht4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_iwht4x4_16_add/;
   } else {
-    add_proto qw/void vp9_idct4x4_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct4x4_1_add sse2 neon dspr2 msa/;
-
-    add_proto qw/void vp9_idct4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct4x4_16_add sse2 neon dspr2 msa/;
-
-    add_proto qw/void vp9_idct8x8_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct8x8_1_add sse2 neon dspr2 msa/;
-
-    add_proto qw/void vp9_idct8x8_64_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct8x8_64_add sse2 neon dspr2 msa/, "$ssse3_x86_64_x86inc";
-
-    add_proto qw/void vp9_idct8x8_12_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct8x8_12_add sse2 neon dspr2 msa/, "$ssse3_x86_64_x86inc";
-
-    add_proto qw/void vp9_idct16x16_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct16x16_1_add sse2 neon dspr2 msa/;
-
-    add_proto qw/void vp9_idct16x16_256_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct16x16_256_add sse2 neon dspr2 msa/;
-
-    add_proto qw/void vp9_idct16x16_10_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct16x16_10_add sse2 neon dspr2 msa/;
-
-    add_proto qw/void vp9_idct32x32_1024_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct32x32_1024_add sse2 neon dspr2 msa/;
-
-    add_proto qw/void vp9_idct32x32_34_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct32x32_34_add sse2 neon_asm dspr2 msa/;
-    #is this a typo?
-    $vp9_idct32x32_34_add_neon_asm=vp9_idct32x32_1024_add_neon;
-
-    add_proto qw/void vp9_idct32x32_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_idct32x32_1_add sse2 neon dspr2 msa/;
-
     add_proto qw/void vp9_iht4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int tx_type";
     specialize qw/vp9_iht4x4_16_add sse2 neon dspr2 msa/;
 
@@ -233,14 +115,6 @@ if (vpx_config("CONFIG_VP9_HIGHBITDEPTH") eq "yes") {
 
     add_proto qw/void vp9_iht16x16_256_add/, "const tran_low_t *input, uint8_t *output, int pitch, int tx_type";
     specialize qw/vp9_iht16x16_256_add sse2 dspr2 msa/;
-
-    # dct and add
-
-    add_proto qw/void vp9_iwht4x4_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_iwht4x4_1_add msa/;
-
-    add_proto qw/void vp9_iwht4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
-    specialize qw/vp9_iwht4x4_16_add msa/, "$sse2_x86inc";
   }
 }
 
@@ -295,24 +169,6 @@ if (vpx_config("CONFIG_VP9_HIGHBITDEPTH") eq "yes") {
   #
   # Note as optimized versions of these functions are added we need to add a check to ensure
   # that when CONFIG_EMULATE_HARDWARE is on, it defaults to the C versions only.
-  add_proto qw/void vp9_highbd_idct4x4_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
-  specialize qw/vp9_highbd_idct4x4_1_add/;
-
-  add_proto qw/void vp9_highbd_idct8x8_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
-  specialize qw/vp9_highbd_idct8x8_1_add/;
-
-  add_proto qw/void vp9_highbd_idct16x16_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
-  specialize qw/vp9_highbd_idct16x16_1_add/;
-
-  add_proto qw/void vp9_highbd_idct32x32_1024_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
-  specialize qw/vp9_highbd_idct32x32_1024_add/;
-
-  add_proto qw/void vp9_highbd_idct32x32_34_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
-  specialize qw/vp9_highbd_idct32x32_34_add/;
-
-  add_proto qw/void vp9_highbd_idct32x32_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
-  specialize qw/vp9_highbd_idct32x32_1_add/;
-
   add_proto qw/void vp9_highbd_iht4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int tx_type, int bd";
   specialize qw/vp9_highbd_iht4x4_16_add/;
 
@@ -321,50 +177,6 @@ if (vpx_config("CONFIG_VP9_HIGHBITDEPTH") eq "yes") {
 
   add_proto qw/void vp9_highbd_iht16x16_256_add/, "const tran_low_t *input, uint8_t *output, int pitch, int tx_type, int bd";
   specialize qw/vp9_highbd_iht16x16_256_add/;
-
-  # dct and add
-
-  add_proto qw/void vp9_highbd_iwht4x4_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
-  specialize qw/vp9_highbd_iwht4x4_1_add/;
-
-  add_proto qw/void vp9_highbd_iwht4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
-  specialize qw/vp9_highbd_iwht4x4_16_add/;
-
-  # Force C versions if CONFIG_EMULATE_HARDWARE is 1
-  if (vpx_config("CONFIG_EMULATE_HARDWARE") eq "yes") {
-
-    add_proto qw/void vp9_highbd_idct4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
-    specialize qw/vp9_highbd_idct4x4_16_add/;
-
-    add_proto qw/void vp9_highbd_idct8x8_64_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
-    specialize qw/vp9_highbd_idct8x8_64_add/;
-
-    add_proto qw/void vp9_highbd_idct8x8_10_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
-    specialize qw/vp9_highbd_idct8x8_10_add/;
-
-    add_proto qw/void vp9_highbd_idct16x16_256_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
-    specialize qw/vp9_highbd_idct16x16_256_add/;
-
-    add_proto qw/void vp9_highbd_idct16x16_10_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
-    specialize qw/vp9_highbd_idct16x16_10_add/;
-
-  } else {
-
-    add_proto qw/void vp9_highbd_idct4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
-    specialize qw/vp9_highbd_idct4x4_16_add sse2/;
-
-    add_proto qw/void vp9_highbd_idct8x8_64_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
-    specialize qw/vp9_highbd_idct8x8_64_add sse2/;
-
-    add_proto qw/void vp9_highbd_idct8x8_10_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
-    specialize qw/vp9_highbd_idct8x8_10_add sse2/;
-
-    add_proto qw/void vp9_highbd_idct16x16_256_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
-    specialize qw/vp9_highbd_idct16x16_256_add sse2/;
-
-    add_proto qw/void vp9_highbd_idct16x16_10_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
-    specialize qw/vp9_highbd_idct16x16_10_add sse2/;
-  }
 }
 
 #
diff --git a/vp9/common/x86/vp9_idct_intrin_sse2.c b/vp9/common/x86/vp9_idct_intrin_sse2.c
index 086cadf4e..4a1634577 100644
--- a/vp9/common/x86/vp9_idct_intrin_sse2.c
+++ b/vp9/common/x86/vp9_idct_intrin_sse2.c
@@ -8,260 +8,10 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "./vp9_rtcd.h"
-#include "vp9/common/x86/vp9_idct_intrin_sse2.h"
+#include "vpx_dsp/x86/inv_txfm_sse2.h"
 #include "vpx_dsp/x86/txfm_common_sse2.h"
 #include "vpx_ports/mem.h"
 
-#define RECON_AND_STORE4X4(dest, in_x) \
-{                                                     \
-  __m128i d0 = _mm_cvtsi32_si128(*(const int *)(dest)); \
-  d0 = _mm_unpacklo_epi8(d0, zero); \
-  d0 = _mm_add_epi16(in_x, d0); \
-  d0 = _mm_packus_epi16(d0, d0); \
-  *(int *)(dest) = _mm_cvtsi128_si32(d0); \
-}
-
-void vp9_idct4x4_16_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
-  const __m128i zero = _mm_setzero_si128();
-  const __m128i eight = _mm_set1_epi16(8);
-  const __m128i cst = _mm_setr_epi16(
-      (int16_t)cospi_16_64, (int16_t)cospi_16_64, (int16_t)cospi_16_64,
-      (int16_t)-cospi_16_64, (int16_t)cospi_24_64, (int16_t)-cospi_8_64,
-      (int16_t)cospi_8_64, (int16_t)cospi_24_64);
-  const __m128i rounding = _mm_set1_epi32(DCT_CONST_ROUNDING);
-  __m128i input0, input1, input2, input3;
-
-  // Rows
-  input0 = _mm_load_si128((const __m128i *)input);
-  input2 = _mm_load_si128((const __m128i *)(input + 8));
-
-  // Construct i3, i1, i3, i1, i2, i0, i2, i0
-  input0 = _mm_shufflelo_epi16(input0, 0xd8);
-  input0 = _mm_shufflehi_epi16(input0, 0xd8);
-  input2 = _mm_shufflelo_epi16(input2, 0xd8);
-  input2 = _mm_shufflehi_epi16(input2, 0xd8);
-
-  input1 = _mm_unpackhi_epi32(input0, input0);
-  input0 = _mm_unpacklo_epi32(input0, input0);
-  input3 = _mm_unpackhi_epi32(input2, input2);
-  input2 = _mm_unpacklo_epi32(input2, input2);
-
-  // Stage 1
-  input0 = _mm_madd_epi16(input0, cst);
-  input1 = _mm_madd_epi16(input1, cst);
-  input2 = _mm_madd_epi16(input2, cst);
-  input3 = _mm_madd_epi16(input3, cst);
-
-  input0 = _mm_add_epi32(input0, rounding);
-  input1 = _mm_add_epi32(input1, rounding);
-  input2 = _mm_add_epi32(input2, rounding);
-  input3 = _mm_add_epi32(input3, rounding);
-
-  input0 = _mm_srai_epi32(input0, DCT_CONST_BITS);
-  input1 = _mm_srai_epi32(input1, DCT_CONST_BITS);
-  input2 = _mm_srai_epi32(input2, DCT_CONST_BITS);
-  input3 = _mm_srai_epi32(input3, DCT_CONST_BITS);
-
-  // Stage 2
-  input0 = _mm_packs_epi32(input0, input1);
-  input1 = _mm_packs_epi32(input2, input3);
-
-  // Transpose
-  input2 = _mm_unpacklo_epi16(input0, input1);
-  input3 = _mm_unpackhi_epi16(input0, input1);
-  input0 = _mm_unpacklo_epi32(input2, input3);
-  input1 = _mm_unpackhi_epi32(input2, input3);
-
-  // Switch column2, column 3, and then, we got:
-  // input2: column1, column 0;  input3: column2, column 3.
-  input1 = _mm_shuffle_epi32(input1, 0x4e);
-  input2 = _mm_add_epi16(input0, input1);
-  input3 = _mm_sub_epi16(input0, input1);
-
-  // Columns
-  // Construct i3, i1, i3, i1, i2, i0, i2, i0
-  input0 = _mm_unpacklo_epi32(input2, input2);
-  input1 = _mm_unpackhi_epi32(input2, input2);
-  input2 = _mm_unpackhi_epi32(input3, input3);
-  input3 = _mm_unpacklo_epi32(input3, input3);
-
-  // Stage 1
-  input0 = _mm_madd_epi16(input0, cst);
-  input1 = _mm_madd_epi16(input1, cst);
-  input2 = _mm_madd_epi16(input2, cst);
-  input3 = _mm_madd_epi16(input3, cst);
-
-  input0 = _mm_add_epi32(input0, rounding);
-  input1 = _mm_add_epi32(input1, rounding);
-  input2 = _mm_add_epi32(input2, rounding);
-  input3 = _mm_add_epi32(input3, rounding);
-
-  input0 = _mm_srai_epi32(input0, DCT_CONST_BITS);
-  input1 = _mm_srai_epi32(input1, DCT_CONST_BITS);
-  input2 = _mm_srai_epi32(input2, DCT_CONST_BITS);
-  input3 = _mm_srai_epi32(input3, DCT_CONST_BITS);
-
-  // Stage 2
-  input0 = _mm_packs_epi32(input0, input2);
-  input1 = _mm_packs_epi32(input1, input3);
-
-  // Transpose
-  input2 = _mm_unpacklo_epi16(input0, input1);
-  input3 = _mm_unpackhi_epi16(input0, input1);
-  input0 = _mm_unpacklo_epi32(input2, input3);
-  input1 = _mm_unpackhi_epi32(input2, input3);
-
-  // Switch column2, column 3, and then, we got:
-  // input2: column1, column 0;  input3: column2, column 3.
-  input1 = _mm_shuffle_epi32(input1, 0x4e);
-  input2 = _mm_add_epi16(input0, input1);
-  input3 = _mm_sub_epi16(input0, input1);
-
-  // Final round and shift
-  input2 = _mm_add_epi16(input2, eight);
-  input3 = _mm_add_epi16(input3, eight);
-
-  input2 = _mm_srai_epi16(input2, 4);
-  input3 = _mm_srai_epi16(input3, 4);
-
-  // Reconstruction and Store
-  {
-    __m128i d0 = _mm_cvtsi32_si128(*(const int *)(dest));
-    __m128i d2 = _mm_cvtsi32_si128(*(const int *)(dest + stride * 2));
-    d0 = _mm_unpacklo_epi32(d0,
-                            _mm_cvtsi32_si128(*(const int *)(dest + stride)));
-    d2 = _mm_unpacklo_epi32(
-        _mm_cvtsi32_si128(*(const int *)(dest + stride * 3)), d2);
-    d0 = _mm_unpacklo_epi8(d0, zero);
-    d2 = _mm_unpacklo_epi8(d2, zero);
-    d0 = _mm_add_epi16(d0, input2);
-    d2 = _mm_add_epi16(d2, input3);
-    d0 = _mm_packus_epi16(d0, d2);
-    // store input0
-    *(int *)dest = _mm_cvtsi128_si32(d0);
-    // store input1
-    d0 = _mm_srli_si128(d0, 4);
-    *(int *)(dest + stride) = _mm_cvtsi128_si32(d0);
-    // store input2
-    d0 = _mm_srli_si128(d0, 4);
-    *(int *)(dest + stride * 3) = _mm_cvtsi128_si32(d0);
-    // store input3
-    d0 = _mm_srli_si128(d0, 4);
-    *(int *)(dest + stride * 2) = _mm_cvtsi128_si32(d0);
-  }
-}
-
-void vp9_idct4x4_1_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
-  __m128i dc_value;
-  const __m128i zero = _mm_setzero_si128();
-  int a;
-
-  a = dct_const_round_shift(input[0] * cospi_16_64);
-  a = dct_const_round_shift(a * cospi_16_64);
-  a = ROUND_POWER_OF_TWO(a, 4);
-
-  dc_value = _mm_set1_epi16(a);
-
-  RECON_AND_STORE4X4(dest + 0 * stride, dc_value);
-  RECON_AND_STORE4X4(dest + 1 * stride, dc_value);
-  RECON_AND_STORE4X4(dest + 2 * stride, dc_value);
-  RECON_AND_STORE4X4(dest + 3 * stride, dc_value);
-}
-
-static INLINE void transpose_4x4(__m128i *res) {
-  const __m128i tr0_0 = _mm_unpacklo_epi16(res[0], res[1]);
-  const __m128i tr0_1 = _mm_unpackhi_epi16(res[0], res[1]);
-
-  res[0] = _mm_unpacklo_epi16(tr0_0, tr0_1);
-  res[1] = _mm_unpackhi_epi16(tr0_0, tr0_1);
-}
-
-static void idct4_sse2(__m128i *in) {
-  const __m128i k__cospi_p16_p16 = pair_set_epi16(cospi_16_64, cospi_16_64);
-  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);
-  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);
-  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);
-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
-  __m128i u[8], v[8];
-
-  transpose_4x4(in);
-  // stage 1
-  u[0] = _mm_unpacklo_epi16(in[0], in[1]);
-  u[1] = _mm_unpackhi_epi16(in[0], in[1]);
-  v[0] = _mm_madd_epi16(u[0], k__cospi_p16_p16);
-  v[1] = _mm_madd_epi16(u[0], k__cospi_p16_m16);
-  v[2] = _mm_madd_epi16(u[1], k__cospi_p24_m08);
-  v[3] = _mm_madd_epi16(u[1], k__cospi_p08_p24);
-
-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
-
-  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
-  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
-  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
-  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
-
-  u[0] = _mm_packs_epi32(v[0], v[1]);
-  u[1] = _mm_packs_epi32(v[3], v[2]);
-
-  // stage 2
-  in[0] = _mm_add_epi16(u[0], u[1]);
-  in[1] = _mm_sub_epi16(u[0], u[1]);
-  in[1] = _mm_shuffle_epi32(in[1], 0x4E);
-}
-
-static void iadst4_sse2(__m128i *in) {
-  const __m128i k__sinpi_p01_p04 = pair_set_epi16(sinpi_1_9, sinpi_4_9);
-  const __m128i k__sinpi_p03_p02 = pair_set_epi16(sinpi_3_9, sinpi_2_9);
-  const __m128i k__sinpi_p02_m01 = pair_set_epi16(sinpi_2_9, -sinpi_1_9);
-  const __m128i k__sinpi_p03_m04 = pair_set_epi16(sinpi_3_9, -sinpi_4_9);
-  const __m128i k__sinpi_p03_p03 = _mm_set1_epi16((int16_t)sinpi_3_9);
-  const __m128i kZero = _mm_set1_epi16(0);
-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
-  __m128i u[8], v[8], in7;
-
-  transpose_4x4(in);
-  in7 = _mm_srli_si128(in[1], 8);
-  in7 = _mm_add_epi16(in7, in[0]);
-  in7 = _mm_sub_epi16(in7, in[1]);
-
-  u[0] = _mm_unpacklo_epi16(in[0], in[1]);
-  u[1] = _mm_unpackhi_epi16(in[0], in[1]);
-  u[2] = _mm_unpacklo_epi16(in7, kZero);
-  u[3] = _mm_unpackhi_epi16(in[0], kZero);
-
-  v[0] = _mm_madd_epi16(u[0], k__sinpi_p01_p04);  // s0 + s3
-  v[1] = _mm_madd_epi16(u[1], k__sinpi_p03_p02);  // s2 + s5
-  v[2] = _mm_madd_epi16(u[2], k__sinpi_p03_p03);  // x2
-  v[3] = _mm_madd_epi16(u[0], k__sinpi_p02_m01);  // s1 - s4
-  v[4] = _mm_madd_epi16(u[1], k__sinpi_p03_m04);  // s2 - s6
-  v[5] = _mm_madd_epi16(u[3], k__sinpi_p03_p03);  // s2
-
-  u[0] = _mm_add_epi32(v[0], v[1]);
-  u[1] = _mm_add_epi32(v[3], v[4]);
-  u[2] = v[2];
-  u[3] = _mm_add_epi32(u[0], u[1]);
-  u[4] = _mm_slli_epi32(v[5], 2);
-  u[5] = _mm_add_epi32(u[3], v[5]);
-  u[6] = _mm_sub_epi32(u[5], u[4]);
-
-  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);
-  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);
-  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);
-  v[3] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);
-
-  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);
-  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);
-  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);
-  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);
-
-  in[0] = _mm_packs_epi32(u[0], u[1]);
-  in[1] = _mm_packs_epi32(u[2], u[3]);
-}
-
 void vp9_iht4x4_16_add_sse2(const int16_t *input, uint8_t *dest, int stride,
                             int tx_type) {
   __m128i in[2];
@@ -327,537 +77,6 @@ void vp9_iht4x4_16_add_sse2(const int16_t *input, uint8_t *dest, int stride,
   }
 }
 
-#define TRANSPOSE_8X8(in0, in1, in2, in3, in4, in5, in6, in7, \
-                      out0, out1, out2, out3, out4, out5, out6, out7) \
-  {                                                     \
-    const __m128i tr0_0 = _mm_unpacklo_epi16(in0, in1); \
-    const __m128i tr0_1 = _mm_unpacklo_epi16(in2, in3); \
-    const __m128i tr0_2 = _mm_unpackhi_epi16(in0, in1); \
-    const __m128i tr0_3 = _mm_unpackhi_epi16(in2, in3); \
-    const __m128i tr0_4 = _mm_unpacklo_epi16(in4, in5); \
-    const __m128i tr0_5 = _mm_unpacklo_epi16(in6, in7); \
-    const __m128i tr0_6 = _mm_unpackhi_epi16(in4, in5); \
-    const __m128i tr0_7 = _mm_unpackhi_epi16(in6, in7); \
-                                                        \
-    const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1); \
-    const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_2, tr0_3); \
-    const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1); \
-    const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_2, tr0_3); \
-    const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5); \
-    const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7); \
-    const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5); \
-    const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7); \
-                                                            \
-    out0 = _mm_unpacklo_epi64(tr1_0, tr1_4); \
-    out1 = _mm_unpackhi_epi64(tr1_0, tr1_4); \
-    out2 = _mm_unpacklo_epi64(tr1_2, tr1_6); \
-    out3 = _mm_unpackhi_epi64(tr1_2, tr1_6); \
-    out4 = _mm_unpacklo_epi64(tr1_1, tr1_5); \
-    out5 = _mm_unpackhi_epi64(tr1_1, tr1_5); \
-    out6 = _mm_unpacklo_epi64(tr1_3, tr1_7); \
-    out7 = _mm_unpackhi_epi64(tr1_3, tr1_7); \
-  }
-
-#define TRANSPOSE_4X8_10(tmp0, tmp1, tmp2, tmp3, \
-                         out0, out1, out2, out3) \
-  {                                              \
-    const __m128i tr0_0 = _mm_unpackhi_epi16(tmp0, tmp1); \
-    const __m128i tr0_1 = _mm_unpacklo_epi16(tmp1, tmp0); \
-    const __m128i tr0_4 = _mm_unpacklo_epi16(tmp2, tmp3); \
-    const __m128i tr0_5 = _mm_unpackhi_epi16(tmp3, tmp2); \
-    \
-    const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1); \
-    const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1); \
-    const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5); \
-    const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5); \
-    \
-    out0 = _mm_unpacklo_epi64(tr1_0, tr1_4); \
-    out1 = _mm_unpackhi_epi64(tr1_0, tr1_4); \
-    out2 = _mm_unpacklo_epi64(tr1_2, tr1_6); \
-    out3 = _mm_unpackhi_epi64(tr1_2, tr1_6); \
-  }
-
-#define TRANSPOSE_8X8_10(in0, in1, in2, in3, out0, out1) \
-  {                                            \
-    const __m128i tr0_0 = _mm_unpacklo_epi16(in0, in1); \
-    const __m128i tr0_1 = _mm_unpacklo_epi16(in2, in3); \
-    out0 = _mm_unpacklo_epi32(tr0_0, tr0_1); \
-    out1 = _mm_unpackhi_epi32(tr0_0, tr0_1); \
-  }
-
-// Define Macro for multiplying elements by constants and adding them together.
-#define MULTIPLICATION_AND_ADD(lo_0, hi_0, lo_1, hi_1, \
-                               cst0, cst1, cst2, cst3, res0, res1, res2, res3) \
-  {   \
-      tmp0 = _mm_madd_epi16(lo_0, cst0); \
-      tmp1 = _mm_madd_epi16(hi_0, cst0); \
-      tmp2 = _mm_madd_epi16(lo_0, cst1); \
-      tmp3 = _mm_madd_epi16(hi_0, cst1); \
-      tmp4 = _mm_madd_epi16(lo_1, cst2); \
-      tmp5 = _mm_madd_epi16(hi_1, cst2); \
-      tmp6 = _mm_madd_epi16(lo_1, cst3); \
-      tmp7 = _mm_madd_epi16(hi_1, cst3); \
-      \
-      tmp0 = _mm_add_epi32(tmp0, rounding); \
-      tmp1 = _mm_add_epi32(tmp1, rounding); \
-      tmp2 = _mm_add_epi32(tmp2, rounding); \
-      tmp3 = _mm_add_epi32(tmp3, rounding); \
-      tmp4 = _mm_add_epi32(tmp4, rounding); \
-      tmp5 = _mm_add_epi32(tmp5, rounding); \
-      tmp6 = _mm_add_epi32(tmp6, rounding); \
-      tmp7 = _mm_add_epi32(tmp7, rounding); \
-      \
-      tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS); \
-      tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS); \
-      tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS); \
-      tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS); \
-      tmp4 = _mm_srai_epi32(tmp4, DCT_CONST_BITS); \
-      tmp5 = _mm_srai_epi32(tmp5, DCT_CONST_BITS); \
-      tmp6 = _mm_srai_epi32(tmp6, DCT_CONST_BITS); \
-      tmp7 = _mm_srai_epi32(tmp7, DCT_CONST_BITS); \
-      \
-      res0 = _mm_packs_epi32(tmp0, tmp1); \
-      res1 = _mm_packs_epi32(tmp2, tmp3); \
-      res2 = _mm_packs_epi32(tmp4, tmp5); \
-      res3 = _mm_packs_epi32(tmp6, tmp7); \
-  }
-
-#define MULTIPLICATION_AND_ADD_2(lo_0, hi_0, cst0, cst1, res0, res1) \
-  {   \
-      tmp0 = _mm_madd_epi16(lo_0, cst0); \
-      tmp1 = _mm_madd_epi16(hi_0, cst0); \
-      tmp2 = _mm_madd_epi16(lo_0, cst1); \
-      tmp3 = _mm_madd_epi16(hi_0, cst1); \
-      \
-      tmp0 = _mm_add_epi32(tmp0, rounding); \
-      tmp1 = _mm_add_epi32(tmp1, rounding); \
-      tmp2 = _mm_add_epi32(tmp2, rounding); \
-      tmp3 = _mm_add_epi32(tmp3, rounding); \
-      \
-      tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS); \
-      tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS); \
-      tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS); \
-      tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS); \
-      \
-      res0 = _mm_packs_epi32(tmp0, tmp1); \
-      res1 = _mm_packs_epi32(tmp2, tmp3); \
-  }
-
-#define IDCT8(in0, in1, in2, in3, in4, in5, in6, in7, \
-                 out0, out1, out2, out3, out4, out5, out6, out7)  \
-  { \
-  /* Stage1 */      \
-  { \
-    const __m128i lo_17 = _mm_unpacklo_epi16(in1, in7); \
-    const __m128i hi_17 = _mm_unpackhi_epi16(in1, in7); \
-    const __m128i lo_35 = _mm_unpacklo_epi16(in3, in5); \
-    const __m128i hi_35 = _mm_unpackhi_epi16(in3, in5); \
-    \
-    MULTIPLICATION_AND_ADD(lo_17, hi_17, lo_35, hi_35, stg1_0, \
-                          stg1_1, stg1_2, stg1_3, stp1_4,      \
-                          stp1_7, stp1_5, stp1_6)              \
-  } \
-    \
-  /* Stage2 */ \
-  { \
-    const __m128i lo_04 = _mm_unpacklo_epi16(in0, in4); \
-    const __m128i hi_04 = _mm_unpackhi_epi16(in0, in4); \
-    const __m128i lo_26 = _mm_unpacklo_epi16(in2, in6); \
-    const __m128i hi_26 = _mm_unpackhi_epi16(in2, in6); \
-    \
-    MULTIPLICATION_AND_ADD(lo_04, hi_04, lo_26, hi_26, stg2_0, \
-                           stg2_1, stg2_2, stg2_3, stp2_0,     \
-                           stp2_1, stp2_2, stp2_3)             \
-    \
-    stp2_4 = _mm_adds_epi16(stp1_4, stp1_5); \
-    stp2_5 = _mm_subs_epi16(stp1_4, stp1_5); \
-    stp2_6 = _mm_subs_epi16(stp1_7, stp1_6); \
-    stp2_7 = _mm_adds_epi16(stp1_7, stp1_6); \
-  } \
-    \
-  /* Stage3 */ \
-  { \
-    const __m128i lo_56 = _mm_unpacklo_epi16(stp2_6, stp2_5); \
-    const __m128i hi_56 = _mm_unpackhi_epi16(stp2_6, stp2_5); \
-    \
-    stp1_0 = _mm_adds_epi16(stp2_0, stp2_3); \
-    stp1_1 = _mm_adds_epi16(stp2_1, stp2_2); \
-    stp1_2 = _mm_subs_epi16(stp2_1, stp2_2); \
-    stp1_3 = _mm_subs_epi16(stp2_0, stp2_3); \
-    \
-    tmp0 = _mm_madd_epi16(lo_56, stg2_1); \
-    tmp1 = _mm_madd_epi16(hi_56, stg2_1); \
-    tmp2 = _mm_madd_epi16(lo_56, stg2_0); \
-    tmp3 = _mm_madd_epi16(hi_56, stg2_0); \
-    \
-    tmp0 = _mm_add_epi32(tmp0, rounding); \
-    tmp1 = _mm_add_epi32(tmp1, rounding); \
-    tmp2 = _mm_add_epi32(tmp2, rounding); \
-    tmp3 = _mm_add_epi32(tmp3, rounding); \
-    \
-    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS); \
-    tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS); \
-    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS); \
-    tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS); \
-    \
-    stp1_5 = _mm_packs_epi32(tmp0, tmp1); \
-    stp1_6 = _mm_packs_epi32(tmp2, tmp3); \
-  } \
-  \
-  /* Stage4  */ \
-  out0 = _mm_adds_epi16(stp1_0, stp2_7); \
-  out1 = _mm_adds_epi16(stp1_1, stp1_6); \
-  out2 = _mm_adds_epi16(stp1_2, stp1_5); \
-  out3 = _mm_adds_epi16(stp1_3, stp2_4); \
-  out4 = _mm_subs_epi16(stp1_3, stp2_4); \
-  out5 = _mm_subs_epi16(stp1_2, stp1_5); \
-  out6 = _mm_subs_epi16(stp1_1, stp1_6); \
-  out7 = _mm_subs_epi16(stp1_0, stp2_7); \
-  }
-
-void vp9_idct8x8_64_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
-  const __m128i zero = _mm_setzero_si128();
-  const __m128i rounding = _mm_set1_epi32(DCT_CONST_ROUNDING);
-  const __m128i final_rounding = _mm_set1_epi16(1 << 4);
-  const __m128i stg1_0 = pair_set_epi16(cospi_28_64, -cospi_4_64);
-  const __m128i stg1_1 = pair_set_epi16(cospi_4_64, cospi_28_64);
-  const __m128i stg1_2 = pair_set_epi16(-cospi_20_64, cospi_12_64);
-  const __m128i stg1_3 = pair_set_epi16(cospi_12_64, cospi_20_64);
-  const __m128i stg2_0 = pair_set_epi16(cospi_16_64, cospi_16_64);
-  const __m128i stg2_1 = pair_set_epi16(cospi_16_64, -cospi_16_64);
-  const __m128i stg2_2 = pair_set_epi16(cospi_24_64, -cospi_8_64);
-  const __m128i stg2_3 = pair_set_epi16(cospi_8_64, cospi_24_64);
-
-  __m128i in0, in1, in2, in3, in4, in5, in6, in7;
-  __m128i stp1_0, stp1_1, stp1_2, stp1_3, stp1_4, stp1_5, stp1_6, stp1_7;
-  __m128i stp2_0, stp2_1, stp2_2, stp2_3, stp2_4, stp2_5, stp2_6, stp2_7;
-  __m128i tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
-  int i;
-
-  // Load input data.
-  in0 = _mm_load_si128((const __m128i *)input);
-  in1 = _mm_load_si128((const __m128i *)(input + 8 * 1));
-  in2 = _mm_load_si128((const __m128i *)(input + 8 * 2));
-  in3 = _mm_load_si128((const __m128i *)(input + 8 * 3));
-  in4 = _mm_load_si128((const __m128i *)(input + 8 * 4));
-  in5 = _mm_load_si128((const __m128i *)(input + 8 * 5));
-  in6 = _mm_load_si128((const __m128i *)(input + 8 * 6));
-  in7 = _mm_load_si128((const __m128i *)(input + 8 * 7));
-
-  // 2-D
-  for (i = 0; i < 2; i++) {
-    // 8x8 Transpose is copied from vp9_fdct8x8_sse2()
-    TRANSPOSE_8X8(in0, in1, in2, in3, in4, in5, in6, in7,
-                  in0, in1, in2, in3, in4, in5, in6, in7);
-
-    // 4-stage 1D idct8x8
-    IDCT8(in0, in1, in2, in3, in4, in5, in6, in7,
-          in0, in1, in2, in3, in4, in5, in6, in7);
-  }
-
-  // Final rounding and shift
-  in0 = _mm_adds_epi16(in0, final_rounding);
-  in1 = _mm_adds_epi16(in1, final_rounding);
-  in2 = _mm_adds_epi16(in2, final_rounding);
-  in3 = _mm_adds_epi16(in3, final_rounding);
-  in4 = _mm_adds_epi16(in4, final_rounding);
-  in5 = _mm_adds_epi16(in5, final_rounding);
-  in6 = _mm_adds_epi16(in6, final_rounding);
-  in7 = _mm_adds_epi16(in7, final_rounding);
-
-  in0 = _mm_srai_epi16(in0, 5);
-  in1 = _mm_srai_epi16(in1, 5);
-  in2 = _mm_srai_epi16(in2, 5);
-  in3 = _mm_srai_epi16(in3, 5);
-  in4 = _mm_srai_epi16(in4, 5);
-  in5 = _mm_srai_epi16(in5, 5);
-  in6 = _mm_srai_epi16(in6, 5);
-  in7 = _mm_srai_epi16(in7, 5);
-
-  RECON_AND_STORE(dest + 0 * stride, in0);
-  RECON_AND_STORE(dest + 1 * stride, in1);
-  RECON_AND_STORE(dest + 2 * stride, in2);
-  RECON_AND_STORE(dest + 3 * stride, in3);
-  RECON_AND_STORE(dest + 4 * stride, in4);
-  RECON_AND_STORE(dest + 5 * stride, in5);
-  RECON_AND_STORE(dest + 6 * stride, in6);
-  RECON_AND_STORE(dest + 7 * stride, in7);
-}
-
-void vp9_idct8x8_1_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
-  __m128i dc_value;
-  const __m128i zero = _mm_setzero_si128();
-  int a;
-
-  a = dct_const_round_shift(input[0] * cospi_16_64);
-  a = dct_const_round_shift(a * cospi_16_64);
-  a = ROUND_POWER_OF_TWO(a, 5);
-
-  dc_value = _mm_set1_epi16(a);
-
-  RECON_AND_STORE(dest + 0 * stride, dc_value);
-  RECON_AND_STORE(dest + 1 * stride, dc_value);
-  RECON_AND_STORE(dest + 2 * stride, dc_value);
-  RECON_AND_STORE(dest + 3 * stride, dc_value);
-  RECON_AND_STORE(dest + 4 * stride, dc_value);
-  RECON_AND_STORE(dest + 5 * stride, dc_value);
-  RECON_AND_STORE(dest + 6 * stride, dc_value);
-  RECON_AND_STORE(dest + 7 * stride, dc_value);
-}
-
-static void idct8_sse2(__m128i *in) {
-  const __m128i rounding = _mm_set1_epi32(DCT_CONST_ROUNDING);
-  const __m128i stg1_0 = pair_set_epi16(cospi_28_64, -cospi_4_64);
-  const __m128i stg1_1 = pair_set_epi16(cospi_4_64, cospi_28_64);
-  const __m128i stg1_2 = pair_set_epi16(-cospi_20_64, cospi_12_64);
-  const __m128i stg1_3 = pair_set_epi16(cospi_12_64, cospi_20_64);
-  const __m128i stg2_0 = pair_set_epi16(cospi_16_64, cospi_16_64);
-  const __m128i stg2_1 = pair_set_epi16(cospi_16_64, -cospi_16_64);
-  const __m128i stg2_2 = pair_set_epi16(cospi_24_64, -cospi_8_64);
-  const __m128i stg2_3 = pair_set_epi16(cospi_8_64, cospi_24_64);
-
-  __m128i in0, in1, in2, in3, in4, in5, in6, in7;
-  __m128i stp1_0, stp1_1, stp1_2, stp1_3, stp1_4, stp1_5, stp1_6, stp1_7;
-  __m128i stp2_0, stp2_1, stp2_2, stp2_3, stp2_4, stp2_5, stp2_6, stp2_7;
-  __m128i tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
-
-  // 8x8 Transpose is copied from vp9_fdct8x8_sse2()
-  TRANSPOSE_8X8(in[0], in[1], in[2], in[3], in[4], in[5], in[6], in[7],
-                in0, in1, in2, in3, in4, in5, in6, in7);
-
-  // 4-stage 1D idct8x8
-  IDCT8(in0, in1, in2, in3, in4, in5, in6, in7,
-        in[0], in[1], in[2], in[3], in[4], in[5], in[6], in[7]);
-}
-
-static void iadst8_sse2(__m128i *in) {
-  const __m128i k__cospi_p02_p30 = pair_set_epi16(cospi_2_64, cospi_30_64);
-  const __m128i k__cospi_p30_m02 = pair_set_epi16(cospi_30_64, -cospi_2_64);
-  const __m128i k__cospi_p10_p22 = pair_set_epi16(cospi_10_64, cospi_22_64);
-  const __m128i k__cospi_p22_m10 = pair_set_epi16(cospi_22_64, -cospi_10_64);
-  const __m128i k__cospi_p18_p14 = pair_set_epi16(cospi_18_64, cospi_14_64);
-  const __m128i k__cospi_p14_m18 = pair_set_epi16(cospi_14_64, -cospi_18_64);
-  const __m128i k__cospi_p26_p06 = pair_set_epi16(cospi_26_64, cospi_6_64);
-  const __m128i k__cospi_p06_m26 = pair_set_epi16(cospi_6_64, -cospi_26_64);
-  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);
-  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);
-  const __m128i k__cospi_m24_p08 = pair_set_epi16(-cospi_24_64, cospi_8_64);
-  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);
-  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);
-  const __m128i k__const_0 = _mm_set1_epi16(0);
-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
-
-  __m128i u0, u1, u2, u3, u4, u5, u6, u7, u8, u9, u10, u11, u12, u13, u14, u15;
-  __m128i v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15;
-  __m128i w0, w1, w2, w3, w4, w5, w6, w7, w8, w9, w10, w11, w12, w13, w14, w15;
-  __m128i s0, s1, s2, s3, s4, s5, s6, s7;
-  __m128i in0, in1, in2, in3, in4, in5, in6, in7;
-
-  // transpose
-  array_transpose_8x8(in, in);
-
-  // properly aligned for butterfly input
-  in0 = in[7];
-  in1 = in[0];
-  in2 = in[5];
-  in3 = in[2];
-  in4 = in[3];
-  in5 = in[4];
-  in6 = in[1];
-  in7 = in[6];
-
-  // column transformation
-  // stage 1
-  // interleave and multiply/add into 32-bit integer
-  s0 = _mm_unpacklo_epi16(in0, in1);
-  s1 = _mm_unpackhi_epi16(in0, in1);
-  s2 = _mm_unpacklo_epi16(in2, in3);
-  s3 = _mm_unpackhi_epi16(in2, in3);
-  s4 = _mm_unpacklo_epi16(in4, in5);
-  s5 = _mm_unpackhi_epi16(in4, in5);
-  s6 = _mm_unpacklo_epi16(in6, in7);
-  s7 = _mm_unpackhi_epi16(in6, in7);
-
-  u0 = _mm_madd_epi16(s0, k__cospi_p02_p30);
-  u1 = _mm_madd_epi16(s1, k__cospi_p02_p30);
-  u2 = _mm_madd_epi16(s0, k__cospi_p30_m02);
-  u3 = _mm_madd_epi16(s1, k__cospi_p30_m02);
-  u4 = _mm_madd_epi16(s2, k__cospi_p10_p22);
-  u5 = _mm_madd_epi16(s3, k__cospi_p10_p22);
-  u6 = _mm_madd_epi16(s2, k__cospi_p22_m10);
-  u7 = _mm_madd_epi16(s3, k__cospi_p22_m10);
-  u8 = _mm_madd_epi16(s4, k__cospi_p18_p14);
-  u9 = _mm_madd_epi16(s5, k__cospi_p18_p14);
-  u10 = _mm_madd_epi16(s4, k__cospi_p14_m18);
-  u11 = _mm_madd_epi16(s5, k__cospi_p14_m18);
-  u12 = _mm_madd_epi16(s6, k__cospi_p26_p06);
-  u13 = _mm_madd_epi16(s7, k__cospi_p26_p06);
-  u14 = _mm_madd_epi16(s6, k__cospi_p06_m26);
-  u15 = _mm_madd_epi16(s7, k__cospi_p06_m26);
-
-  // addition
-  w0 = _mm_add_epi32(u0, u8);
-  w1 = _mm_add_epi32(u1, u9);
-  w2 = _mm_add_epi32(u2, u10);
-  w3 = _mm_add_epi32(u3, u11);
-  w4 = _mm_add_epi32(u4, u12);
-  w5 = _mm_add_epi32(u5, u13);
-  w6 = _mm_add_epi32(u6, u14);
-  w7 = _mm_add_epi32(u7, u15);
-  w8 = _mm_sub_epi32(u0, u8);
-  w9 = _mm_sub_epi32(u1, u9);
-  w10 = _mm_sub_epi32(u2, u10);
-  w11 = _mm_sub_epi32(u3, u11);
-  w12 = _mm_sub_epi32(u4, u12);
-  w13 = _mm_sub_epi32(u5, u13);
-  w14 = _mm_sub_epi32(u6, u14);
-  w15 = _mm_sub_epi32(u7, u15);
-
-  // shift and rounding
-  v0 = _mm_add_epi32(w0, k__DCT_CONST_ROUNDING);
-  v1 = _mm_add_epi32(w1, k__DCT_CONST_ROUNDING);
-  v2 = _mm_add_epi32(w2, k__DCT_CONST_ROUNDING);
-  v3 = _mm_add_epi32(w3, k__DCT_CONST_ROUNDING);
-  v4 = _mm_add_epi32(w4, k__DCT_CONST_ROUNDING);
-  v5 = _mm_add_epi32(w5, k__DCT_CONST_ROUNDING);
-  v6 = _mm_add_epi32(w6, k__DCT_CONST_ROUNDING);
-  v7 = _mm_add_epi32(w7, k__DCT_CONST_ROUNDING);
-  v8 = _mm_add_epi32(w8, k__DCT_CONST_ROUNDING);
-  v9 = _mm_add_epi32(w9, k__DCT_CONST_ROUNDING);
-  v10 = _mm_add_epi32(w10, k__DCT_CONST_ROUNDING);
-  v11 = _mm_add_epi32(w11, k__DCT_CONST_ROUNDING);
-  v12 = _mm_add_epi32(w12, k__DCT_CONST_ROUNDING);
-  v13 = _mm_add_epi32(w13, k__DCT_CONST_ROUNDING);
-  v14 = _mm_add_epi32(w14, k__DCT_CONST_ROUNDING);
-  v15 = _mm_add_epi32(w15, k__DCT_CONST_ROUNDING);
-
-  u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
-  u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
-  u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
-  u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
-  u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);
-  u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);
-  u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);
-  u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);
-  u8 = _mm_srai_epi32(v8, DCT_CONST_BITS);
-  u9 = _mm_srai_epi32(v9, DCT_CONST_BITS);
-  u10 = _mm_srai_epi32(v10, DCT_CONST_BITS);
-  u11 = _mm_srai_epi32(v11, DCT_CONST_BITS);
-  u12 = _mm_srai_epi32(v12, DCT_CONST_BITS);
-  u13 = _mm_srai_epi32(v13, DCT_CONST_BITS);
-  u14 = _mm_srai_epi32(v14, DCT_CONST_BITS);
-  u15 = _mm_srai_epi32(v15, DCT_CONST_BITS);
-
-  // back to 16-bit and pack 8 integers into __m128i
-  in[0] = _mm_packs_epi32(u0, u1);
-  in[1] = _mm_packs_epi32(u2, u3);
-  in[2] = _mm_packs_epi32(u4, u5);
-  in[3] = _mm_packs_epi32(u6, u7);
-  in[4] = _mm_packs_epi32(u8, u9);
-  in[5] = _mm_packs_epi32(u10, u11);
-  in[6] = _mm_packs_epi32(u12, u13);
-  in[7] = _mm_packs_epi32(u14, u15);
-
-  // stage 2
-  s0 = _mm_add_epi16(in[0], in[2]);
-  s1 = _mm_add_epi16(in[1], in[3]);
-  s2 = _mm_sub_epi16(in[0], in[2]);
-  s3 = _mm_sub_epi16(in[1], in[3]);
-  u0 = _mm_unpacklo_epi16(in[4], in[5]);
-  u1 = _mm_unpackhi_epi16(in[4], in[5]);
-  u2 = _mm_unpacklo_epi16(in[6], in[7]);
-  u3 = _mm_unpackhi_epi16(in[6], in[7]);
-
-  v0 = _mm_madd_epi16(u0, k__cospi_p08_p24);
-  v1 = _mm_madd_epi16(u1, k__cospi_p08_p24);
-  v2 = _mm_madd_epi16(u0, k__cospi_p24_m08);
-  v3 = _mm_madd_epi16(u1, k__cospi_p24_m08);
-  v4 = _mm_madd_epi16(u2, k__cospi_m24_p08);
-  v5 = _mm_madd_epi16(u3, k__cospi_m24_p08);
-  v6 = _mm_madd_epi16(u2, k__cospi_p08_p24);
-  v7 = _mm_madd_epi16(u3, k__cospi_p08_p24);
-
-  w0 = _mm_add_epi32(v0, v4);
-  w1 = _mm_add_epi32(v1, v5);
-  w2 = _mm_add_epi32(v2, v6);
-  w3 = _mm_add_epi32(v3, v7);
-  w4 = _mm_sub_epi32(v0, v4);
-  w5 = _mm_sub_epi32(v1, v5);
-  w6 = _mm_sub_epi32(v2, v6);
-  w7 = _mm_sub_epi32(v3, v7);
-
-  v0 = _mm_add_epi32(w0, k__DCT_CONST_ROUNDING);
-  v1 = _mm_add_epi32(w1, k__DCT_CONST_ROUNDING);
-  v2 = _mm_add_epi32(w2, k__DCT_CONST_ROUNDING);
-  v3 = _mm_add_epi32(w3, k__DCT_CONST_ROUNDING);
-  v4 = _mm_add_epi32(w4, k__DCT_CONST_ROUNDING);
-  v5 = _mm_add_epi32(w5, k__DCT_CONST_ROUNDING);
-  v6 = _mm_add_epi32(w6, k__DCT_CONST_ROUNDING);
-  v7 = _mm_add_epi32(w7, k__DCT_CONST_ROUNDING);
-
-  u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
-  u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
-  u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
-  u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
-  u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);
-  u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);
-  u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);
-  u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);
-
-  // back to 16-bit intergers
-  s4 = _mm_packs_epi32(u0, u1);
-  s5 = _mm_packs_epi32(u2, u3);
-  s6 = _mm_packs_epi32(u4, u5);
-  s7 = _mm_packs_epi32(u6, u7);
-
-  // stage 3
-  u0 = _mm_unpacklo_epi16(s2, s3);
-  u1 = _mm_unpackhi_epi16(s2, s3);
-  u2 = _mm_unpacklo_epi16(s6, s7);
-  u3 = _mm_unpackhi_epi16(s6, s7);
-
-  v0 = _mm_madd_epi16(u0, k__cospi_p16_p16);
-  v1 = _mm_madd_epi16(u1, k__cospi_p16_p16);
-  v2 = _mm_madd_epi16(u0, k__cospi_p16_m16);
-  v3 = _mm_madd_epi16(u1, k__cospi_p16_m16);
-  v4 = _mm_madd_epi16(u2, k__cospi_p16_p16);
-  v5 = _mm_madd_epi16(u3, k__cospi_p16_p16);
-  v6 = _mm_madd_epi16(u2, k__cospi_p16_m16);
-  v7 = _mm_madd_epi16(u3, k__cospi_p16_m16);
-
-  u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);
-  u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);
-  u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);
-  u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);
-  u4 = _mm_add_epi32(v4, k__DCT_CONST_ROUNDING);
-  u5 = _mm_add_epi32(v5, k__DCT_CONST_ROUNDING);
-  u6 = _mm_add_epi32(v6, k__DCT_CONST_ROUNDING);
-  u7 = _mm_add_epi32(v7, k__DCT_CONST_ROUNDING);
-
-  v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);
-  v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);
-  v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);
-  v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);
-  v4 = _mm_srai_epi32(u4, DCT_CONST_BITS);
-  v5 = _mm_srai_epi32(u5, DCT_CONST_BITS);
-  v6 = _mm_srai_epi32(u6, DCT_CONST_BITS);
-  v7 = _mm_srai_epi32(u7, DCT_CONST_BITS);
-
-  s2 = _mm_packs_epi32(v0, v1);
-  s3 = _mm_packs_epi32(v2, v3);
-  s6 = _mm_packs_epi32(v4, v5);
-  s7 = _mm_packs_epi32(v6, v7);
-
-  in[0] = s0;
-  in[1] = _mm_sub_epi16(k__const_0, s4);
-  in[2] = s6;
-  in[3] = _mm_sub_epi16(k__const_0, s2);
-  in[4] = s3;
-  in[5] = _mm_sub_epi16(k__const_0, s7);
-  in[6] = s5;
-  in[7] = _mm_sub_epi16(k__const_0, s1);
-}
-
 void vp9_iht8x8_64_add_sse2(const int16_t *input, uint8_t *dest, int stride,
                             int tx_type) {
   __m128i in[8];
@@ -925,1366 +144,6 @@ void vp9_iht8x8_64_add_sse2(const int16_t *input, uint8_t *dest, int stride,
   RECON_AND_STORE(dest + 7 * stride, in[7]);
 }
 
-void vp9_idct8x8_12_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
-  const __m128i zero = _mm_setzero_si128();
-  const __m128i rounding = _mm_set1_epi32(DCT_CONST_ROUNDING);
-  const __m128i final_rounding = _mm_set1_epi16(1 << 4);
-  const __m128i stg1_0 = pair_set_epi16(cospi_28_64, -cospi_4_64);
-  const __m128i stg1_1 = pair_set_epi16(cospi_4_64, cospi_28_64);
-  const __m128i stg1_2 = pair_set_epi16(-cospi_20_64, cospi_12_64);
-  const __m128i stg1_3 = pair_set_epi16(cospi_12_64, cospi_20_64);
-  const __m128i stg2_0 = pair_set_epi16(cospi_16_64, cospi_16_64);
-  const __m128i stg2_1 = pair_set_epi16(cospi_16_64, -cospi_16_64);
-  const __m128i stg2_2 = pair_set_epi16(cospi_24_64, -cospi_8_64);
-  const __m128i stg2_3 = pair_set_epi16(cospi_8_64, cospi_24_64);
-  const __m128i stg3_0 = pair_set_epi16(-cospi_16_64, cospi_16_64);
-
-  __m128i in0, in1, in2, in3, in4, in5, in6, in7;
-  __m128i stp1_0, stp1_1, stp1_2, stp1_3, stp1_4, stp1_5, stp1_6, stp1_7;
-  __m128i stp2_0, stp2_1, stp2_2, stp2_3, stp2_4, stp2_5, stp2_6, stp2_7;
-  __m128i tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
-
-  // Rows. Load 4-row input data.
-  in0 = _mm_load_si128((const __m128i *)input);
-  in1 = _mm_load_si128((const __m128i *)(input + 8 * 1));
-  in2 = _mm_load_si128((const __m128i *)(input + 8 * 2));
-  in3 = _mm_load_si128((const __m128i *)(input + 8 * 3));
-
-  // 8x4 Transpose
-  TRANSPOSE_8X8_10(in0, in1, in2, in3, in0, in1);
-  // Stage1
-  {
-    const __m128i lo_17 = _mm_unpackhi_epi16(in0, zero);
-    const __m128i lo_35 = _mm_unpackhi_epi16(in1, zero);
-
-    tmp0 = _mm_madd_epi16(lo_17, stg1_0);
-    tmp2 = _mm_madd_epi16(lo_17, stg1_1);
-    tmp4 = _mm_madd_epi16(lo_35, stg1_2);
-    tmp6 = _mm_madd_epi16(lo_35, stg1_3);
-
-    tmp0 = _mm_add_epi32(tmp0, rounding);
-    tmp2 = _mm_add_epi32(tmp2, rounding);
-    tmp4 = _mm_add_epi32(tmp4, rounding);
-    tmp6 = _mm_add_epi32(tmp6, rounding);
-    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS);
-    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS);
-    tmp4 = _mm_srai_epi32(tmp4, DCT_CONST_BITS);
-    tmp6 = _mm_srai_epi32(tmp6, DCT_CONST_BITS);
-
-    stp1_4 = _mm_packs_epi32(tmp0, tmp2);
-    stp1_5 = _mm_packs_epi32(tmp4, tmp6);
-  }
-
-  // Stage2
-  {
-    const __m128i lo_04 = _mm_unpacklo_epi16(in0, zero);
-    const __m128i lo_26 = _mm_unpacklo_epi16(in1, zero);
-
-    tmp0 = _mm_madd_epi16(lo_04, stg2_0);
-    tmp2 = _mm_madd_epi16(lo_04, stg2_1);
-    tmp4 = _mm_madd_epi16(lo_26, stg2_2);
-    tmp6 = _mm_madd_epi16(lo_26, stg2_3);
-
-    tmp0 = _mm_add_epi32(tmp0, rounding);
-    tmp2 = _mm_add_epi32(tmp2, rounding);
-    tmp4 = _mm_add_epi32(tmp4, rounding);
-    tmp6 = _mm_add_epi32(tmp6, rounding);
-    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS);
-    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS);
-    tmp4 = _mm_srai_epi32(tmp4, DCT_CONST_BITS);
-    tmp6 = _mm_srai_epi32(tmp6, DCT_CONST_BITS);
-
-    stp2_0 = _mm_packs_epi32(tmp0, tmp2);
-    stp2_2 = _mm_packs_epi32(tmp6, tmp4);
-
-    tmp0 = _mm_adds_epi16(stp1_4, stp1_5);
-    tmp1 = _mm_subs_epi16(stp1_4, stp1_5);
-
-    stp2_4 = tmp0;
-    stp2_5 = _mm_unpacklo_epi64(tmp1, zero);
-    stp2_6 = _mm_unpackhi_epi64(tmp1, zero);
-  }
-
-  // Stage3
-  {
-    const __m128i lo_56 = _mm_unpacklo_epi16(stp2_5, stp2_6);
-
-    tmp4 = _mm_adds_epi16(stp2_0, stp2_2);
-    tmp6 = _mm_subs_epi16(stp2_0, stp2_2);
-
-    stp1_2 = _mm_unpackhi_epi64(tmp6, tmp4);
-    stp1_3 = _mm_unpacklo_epi64(tmp6, tmp4);
-
-    tmp0 = _mm_madd_epi16(lo_56, stg3_0);
-    tmp2 = _mm_madd_epi16(lo_56, stg2_0);  // stg3_1 = stg2_0
-
-    tmp0 = _mm_add_epi32(tmp0, rounding);
-    tmp2 = _mm_add_epi32(tmp2, rounding);
-    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS);
-    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS);
-
-    stp1_5 = _mm_packs_epi32(tmp0, tmp2);
-  }
-
-  // Stage4
-  tmp0 = _mm_adds_epi16(stp1_3, stp2_4);
-  tmp1 = _mm_adds_epi16(stp1_2, stp1_5);
-  tmp2 = _mm_subs_epi16(stp1_3, stp2_4);
-  tmp3 = _mm_subs_epi16(stp1_2, stp1_5);
-
-  TRANSPOSE_4X8_10(tmp0, tmp1, tmp2, tmp3, in0, in1, in2, in3)
-
-  IDCT8(in0, in1, in2, in3, zero, zero, zero, zero,
-        in0, in1, in2, in3, in4, in5, in6, in7);
-  // Final rounding and shift
-  in0 = _mm_adds_epi16(in0, final_rounding);
-  in1 = _mm_adds_epi16(in1, final_rounding);
-  in2 = _mm_adds_epi16(in2, final_rounding);
-  in3 = _mm_adds_epi16(in3, final_rounding);
-  in4 = _mm_adds_epi16(in4, final_rounding);
-  in5 = _mm_adds_epi16(in5, final_rounding);
-  in6 = _mm_adds_epi16(in6, final_rounding);
-  in7 = _mm_adds_epi16(in7, final_rounding);
-
-  in0 = _mm_srai_epi16(in0, 5);
-  in1 = _mm_srai_epi16(in1, 5);
-  in2 = _mm_srai_epi16(in2, 5);
-  in3 = _mm_srai_epi16(in3, 5);
-  in4 = _mm_srai_epi16(in4, 5);
-  in5 = _mm_srai_epi16(in5, 5);
-  in6 = _mm_srai_epi16(in6, 5);
-  in7 = _mm_srai_epi16(in7, 5);
-
-  RECON_AND_STORE(dest + 0 * stride, in0);
-  RECON_AND_STORE(dest + 1 * stride, in1);
-  RECON_AND_STORE(dest + 2 * stride, in2);
-  RECON_AND_STORE(dest + 3 * stride, in3);
-  RECON_AND_STORE(dest + 4 * stride, in4);
-  RECON_AND_STORE(dest + 5 * stride, in5);
-  RECON_AND_STORE(dest + 6 * stride, in6);
-  RECON_AND_STORE(dest + 7 * stride, in7);
-}
-
-#define IDCT16 \
-  /* Stage2 */ \
-  { \
-    const __m128i lo_1_15 = _mm_unpacklo_epi16(in[1], in[15]); \
-    const __m128i hi_1_15 = _mm_unpackhi_epi16(in[1], in[15]); \
-    const __m128i lo_9_7 = _mm_unpacklo_epi16(in[9], in[7]);   \
-    const __m128i hi_9_7 = _mm_unpackhi_epi16(in[9], in[7]);   \
-    const __m128i lo_5_11 = _mm_unpacklo_epi16(in[5], in[11]); \
-    const __m128i hi_5_11 = _mm_unpackhi_epi16(in[5], in[11]); \
-    const __m128i lo_13_3 = _mm_unpacklo_epi16(in[13], in[3]); \
-    const __m128i hi_13_3 = _mm_unpackhi_epi16(in[13], in[3]); \
-    \
-    MULTIPLICATION_AND_ADD(lo_1_15, hi_1_15, lo_9_7, hi_9_7, \
-                           stg2_0, stg2_1, stg2_2, stg2_3, \
-                           stp2_8, stp2_15, stp2_9, stp2_14) \
-    \
-    MULTIPLICATION_AND_ADD(lo_5_11, hi_5_11, lo_13_3, hi_13_3, \
-                           stg2_4, stg2_5, stg2_6, stg2_7, \
-                           stp2_10, stp2_13, stp2_11, stp2_12) \
-  } \
-    \
-  /* Stage3 */ \
-  { \
-    const __m128i lo_2_14 = _mm_unpacklo_epi16(in[2], in[14]); \
-    const __m128i hi_2_14 = _mm_unpackhi_epi16(in[2], in[14]); \
-    const __m128i lo_10_6 = _mm_unpacklo_epi16(in[10], in[6]); \
-    const __m128i hi_10_6 = _mm_unpackhi_epi16(in[10], in[6]); \
-    \
-    MULTIPLICATION_AND_ADD(lo_2_14, hi_2_14, lo_10_6, hi_10_6, \
-                           stg3_0, stg3_1, stg3_2, stg3_3, \
-                           stp1_4, stp1_7, stp1_5, stp1_6) \
-    \
-    stp1_8_0 = _mm_add_epi16(stp2_8, stp2_9);  \
-    stp1_9 = _mm_sub_epi16(stp2_8, stp2_9);    \
-    stp1_10 = _mm_sub_epi16(stp2_11, stp2_10); \
-    stp1_11 = _mm_add_epi16(stp2_11, stp2_10); \
-    \
-    stp1_12_0 = _mm_add_epi16(stp2_12, stp2_13); \
-    stp1_13 = _mm_sub_epi16(stp2_12, stp2_13); \
-    stp1_14 = _mm_sub_epi16(stp2_15, stp2_14); \
-    stp1_15 = _mm_add_epi16(stp2_15, stp2_14); \
-  } \
-  \
-  /* Stage4 */ \
-  { \
-    const __m128i lo_0_8 = _mm_unpacklo_epi16(in[0], in[8]); \
-    const __m128i hi_0_8 = _mm_unpackhi_epi16(in[0], in[8]); \
-    const __m128i lo_4_12 = _mm_unpacklo_epi16(in[4], in[12]); \
-    const __m128i hi_4_12 = _mm_unpackhi_epi16(in[4], in[12]); \
-    \
-    const __m128i lo_9_14 = _mm_unpacklo_epi16(stp1_9, stp1_14); \
-    const __m128i hi_9_14 = _mm_unpackhi_epi16(stp1_9, stp1_14); \
-    const __m128i lo_10_13 = _mm_unpacklo_epi16(stp1_10, stp1_13); \
-    const __m128i hi_10_13 = _mm_unpackhi_epi16(stp1_10, stp1_13); \
-    \
-    MULTIPLICATION_AND_ADD(lo_0_8, hi_0_8, lo_4_12, hi_4_12, \
-                           stg4_0, stg4_1, stg4_2, stg4_3, \
-                           stp2_0, stp2_1, stp2_2, stp2_3) \
-    \
-    stp2_4 = _mm_add_epi16(stp1_4, stp1_5); \
-    stp2_5 = _mm_sub_epi16(stp1_4, stp1_5); \
-    stp2_6 = _mm_sub_epi16(stp1_7, stp1_6); \
-    stp2_7 = _mm_add_epi16(stp1_7, stp1_6); \
-    \
-    MULTIPLICATION_AND_ADD(lo_9_14, hi_9_14, lo_10_13, hi_10_13, \
-                           stg4_4, stg4_5, stg4_6, stg4_7, \
-                           stp2_9, stp2_14, stp2_10, stp2_13) \
-  } \
-    \
-  /* Stage5 */ \
-  { \
-    const __m128i lo_6_5 = _mm_unpacklo_epi16(stp2_6, stp2_5); \
-    const __m128i hi_6_5 = _mm_unpackhi_epi16(stp2_6, stp2_5); \
-    \
-    stp1_0 = _mm_add_epi16(stp2_0, stp2_3); \
-    stp1_1 = _mm_add_epi16(stp2_1, stp2_2); \
-    stp1_2 = _mm_sub_epi16(stp2_1, stp2_2); \
-    stp1_3 = _mm_sub_epi16(stp2_0, stp2_3); \
-    \
-    tmp0 = _mm_madd_epi16(lo_6_5, stg4_1); \
-    tmp1 = _mm_madd_epi16(hi_6_5, stg4_1); \
-    tmp2 = _mm_madd_epi16(lo_6_5, stg4_0); \
-    tmp3 = _mm_madd_epi16(hi_6_5, stg4_0); \
-    \
-    tmp0 = _mm_add_epi32(tmp0, rounding); \
-    tmp1 = _mm_add_epi32(tmp1, rounding); \
-    tmp2 = _mm_add_epi32(tmp2, rounding); \
-    tmp3 = _mm_add_epi32(tmp3, rounding); \
-    \
-    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS); \
-    tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS); \
-    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS); \
-    tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS); \
-    \
-    stp1_5 = _mm_packs_epi32(tmp0, tmp1); \
-    stp1_6 = _mm_packs_epi32(tmp2, tmp3); \
-    \
-    stp1_8 = _mm_add_epi16(stp1_8_0, stp1_11);  \
-    stp1_9 = _mm_add_epi16(stp2_9, stp2_10);    \
-    stp1_10 = _mm_sub_epi16(stp2_9, stp2_10);   \
-    stp1_11 = _mm_sub_epi16(stp1_8_0, stp1_11); \
-    \
-    stp1_12 = _mm_sub_epi16(stp1_15, stp1_12_0); \
-    stp1_13 = _mm_sub_epi16(stp2_14, stp2_13);   \
-    stp1_14 = _mm_add_epi16(stp2_14, stp2_13);   \
-    stp1_15 = _mm_add_epi16(stp1_15, stp1_12_0); \
-  } \
-    \
-  /* Stage6 */ \
-  { \
-    const __m128i lo_10_13 = _mm_unpacklo_epi16(stp1_10, stp1_13); \
-    const __m128i hi_10_13 = _mm_unpackhi_epi16(stp1_10, stp1_13); \
-    const __m128i lo_11_12 = _mm_unpacklo_epi16(stp1_11, stp1_12); \
-    const __m128i hi_11_12 = _mm_unpackhi_epi16(stp1_11, stp1_12); \
-    \
-    stp2_0 = _mm_add_epi16(stp1_0, stp2_7); \
-    stp2_1 = _mm_add_epi16(stp1_1, stp1_6); \
-    stp2_2 = _mm_add_epi16(stp1_2, stp1_5); \
-    stp2_3 = _mm_add_epi16(stp1_3, stp2_4); \
-    stp2_4 = _mm_sub_epi16(stp1_3, stp2_4); \
-    stp2_5 = _mm_sub_epi16(stp1_2, stp1_5); \
-    stp2_6 = _mm_sub_epi16(stp1_1, stp1_6); \
-    stp2_7 = _mm_sub_epi16(stp1_0, stp2_7); \
-    \
-    MULTIPLICATION_AND_ADD(lo_10_13, hi_10_13, lo_11_12, hi_11_12, \
-                           stg6_0, stg4_0, stg6_0, stg4_0, \
-                           stp2_10, stp2_13, stp2_11, stp2_12) \
-  }
-
-#define IDCT16_10 \
-    /* Stage2 */ \
-    { \
-      const __m128i lo_1_15 = _mm_unpacklo_epi16(in[1], zero); \
-      const __m128i hi_1_15 = _mm_unpackhi_epi16(in[1], zero); \
-      const __m128i lo_13_3 = _mm_unpacklo_epi16(zero, in[3]); \
-      const __m128i hi_13_3 = _mm_unpackhi_epi16(zero, in[3]); \
-      \
-      MULTIPLICATION_AND_ADD(lo_1_15, hi_1_15, lo_13_3, hi_13_3, \
-                             stg2_0, stg2_1, stg2_6, stg2_7, \
-                             stp1_8_0, stp1_15, stp1_11, stp1_12_0) \
-    } \
-      \
-    /* Stage3 */ \
-    { \
-      const __m128i lo_2_14 = _mm_unpacklo_epi16(in[2], zero); \
-      const __m128i hi_2_14 = _mm_unpackhi_epi16(in[2], zero); \
-      \
-      MULTIPLICATION_AND_ADD_2(lo_2_14, hi_2_14, \
-                               stg3_0, stg3_1,  \
-                               stp2_4, stp2_7) \
-      \
-      stp1_9  =  stp1_8_0; \
-      stp1_10 =  stp1_11;  \
-      \
-      stp1_13 = stp1_12_0; \
-      stp1_14 = stp1_15;   \
-    } \
-    \
-    /* Stage4 */ \
-    { \
-      const __m128i lo_0_8 = _mm_unpacklo_epi16(in[0], zero); \
-      const __m128i hi_0_8 = _mm_unpackhi_epi16(in[0], zero); \
-      \
-      const __m128i lo_9_14 = _mm_unpacklo_epi16(stp1_9, stp1_14); \
-      const __m128i hi_9_14 = _mm_unpackhi_epi16(stp1_9, stp1_14); \
-      const __m128i lo_10_13 = _mm_unpacklo_epi16(stp1_10, stp1_13); \
-      const __m128i hi_10_13 = _mm_unpackhi_epi16(stp1_10, stp1_13); \
-      \
-      MULTIPLICATION_AND_ADD_2(lo_0_8, hi_0_8, \
-                               stg4_0, stg4_1, \
-                               stp1_0, stp1_1) \
-      stp2_5 = stp2_4; \
-      stp2_6 = stp2_7; \
-      \
-      MULTIPLICATION_AND_ADD(lo_9_14, hi_9_14, lo_10_13, hi_10_13, \
-                             stg4_4, stg4_5, stg4_6, stg4_7, \
-                             stp2_9, stp2_14, stp2_10, stp2_13) \
-    } \
-      \
-    /* Stage5 */ \
-    { \
-      const __m128i lo_6_5 = _mm_unpacklo_epi16(stp2_6, stp2_5); \
-      const __m128i hi_6_5 = _mm_unpackhi_epi16(stp2_6, stp2_5); \
-      \
-      stp1_2 = stp1_1; \
-      stp1_3 = stp1_0; \
-      \
-      tmp0 = _mm_madd_epi16(lo_6_5, stg4_1); \
-      tmp1 = _mm_madd_epi16(hi_6_5, stg4_1); \
-      tmp2 = _mm_madd_epi16(lo_6_5, stg4_0); \
-      tmp3 = _mm_madd_epi16(hi_6_5, stg4_0); \
-      \
-      tmp0 = _mm_add_epi32(tmp0, rounding); \
-      tmp1 = _mm_add_epi32(tmp1, rounding); \
-      tmp2 = _mm_add_epi32(tmp2, rounding); \
-      tmp3 = _mm_add_epi32(tmp3, rounding); \
-      \
-      tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS); \
-      tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS); \
-      tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS); \
-      tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS); \
-      \
-      stp1_5 = _mm_packs_epi32(tmp0, tmp1); \
-      stp1_6 = _mm_packs_epi32(tmp2, tmp3); \
-      \
-      stp1_8 = _mm_add_epi16(stp1_8_0, stp1_11);  \
-      stp1_9 = _mm_add_epi16(stp2_9, stp2_10);    \
-      stp1_10 = _mm_sub_epi16(stp2_9, stp2_10);   \
-      stp1_11 = _mm_sub_epi16(stp1_8_0, stp1_11); \
-      \
-      stp1_12 = _mm_sub_epi16(stp1_15, stp1_12_0); \
-      stp1_13 = _mm_sub_epi16(stp2_14, stp2_13);   \
-      stp1_14 = _mm_add_epi16(stp2_14, stp2_13);   \
-      stp1_15 = _mm_add_epi16(stp1_15, stp1_12_0); \
-    } \
-      \
-    /* Stage6 */ \
-    { \
-      const __m128i lo_10_13 = _mm_unpacklo_epi16(stp1_10, stp1_13); \
-      const __m128i hi_10_13 = _mm_unpackhi_epi16(stp1_10, stp1_13); \
-      const __m128i lo_11_12 = _mm_unpacklo_epi16(stp1_11, stp1_12); \
-      const __m128i hi_11_12 = _mm_unpackhi_epi16(stp1_11, stp1_12); \
-      \
-      stp2_0 = _mm_add_epi16(stp1_0, stp2_7); \
-      stp2_1 = _mm_add_epi16(stp1_1, stp1_6); \
-      stp2_2 = _mm_add_epi16(stp1_2, stp1_5); \
-      stp2_3 = _mm_add_epi16(stp1_3, stp2_4); \
-      stp2_4 = _mm_sub_epi16(stp1_3, stp2_4); \
-      stp2_5 = _mm_sub_epi16(stp1_2, stp1_5); \
-      stp2_6 = _mm_sub_epi16(stp1_1, stp1_6); \
-      stp2_7 = _mm_sub_epi16(stp1_0, stp2_7); \
-      \
-      MULTIPLICATION_AND_ADD(lo_10_13, hi_10_13, lo_11_12, hi_11_12, \
-                             stg6_0, stg4_0, stg6_0, stg4_0, \
-                             stp2_10, stp2_13, stp2_11, stp2_12) \
-    }
-
-void vp9_idct16x16_256_add_sse2(const int16_t *input, uint8_t *dest,
-                                int stride) {
-  const __m128i rounding = _mm_set1_epi32(DCT_CONST_ROUNDING);
-  const __m128i final_rounding = _mm_set1_epi16(1 << 5);
-  const __m128i zero = _mm_setzero_si128();
-
-  const __m128i stg2_0 = pair_set_epi16(cospi_30_64, -cospi_2_64);
-  const __m128i stg2_1 = pair_set_epi16(cospi_2_64, cospi_30_64);
-  const __m128i stg2_2 = pair_set_epi16(cospi_14_64, -cospi_18_64);
-  const __m128i stg2_3 = pair_set_epi16(cospi_18_64, cospi_14_64);
-  const __m128i stg2_4 = pair_set_epi16(cospi_22_64, -cospi_10_64);
-  const __m128i stg2_5 = pair_set_epi16(cospi_10_64, cospi_22_64);
-  const __m128i stg2_6 = pair_set_epi16(cospi_6_64, -cospi_26_64);
-  const __m128i stg2_7 = pair_set_epi16(cospi_26_64, cospi_6_64);
-
-  const __m128i stg3_0 = pair_set_epi16(cospi_28_64, -cospi_4_64);
-  const __m128i stg3_1 = pair_set_epi16(cospi_4_64, cospi_28_64);
-  const __m128i stg3_2 = pair_set_epi16(cospi_12_64, -cospi_20_64);
-  const __m128i stg3_3 = pair_set_epi16(cospi_20_64, cospi_12_64);
-
-  const __m128i stg4_0 = pair_set_epi16(cospi_16_64, cospi_16_64);
-  const __m128i stg4_1 = pair_set_epi16(cospi_16_64, -cospi_16_64);
-  const __m128i stg4_2 = pair_set_epi16(cospi_24_64, -cospi_8_64);
-  const __m128i stg4_3 = pair_set_epi16(cospi_8_64, cospi_24_64);
-  const __m128i stg4_4 = pair_set_epi16(-cospi_8_64, cospi_24_64);
-  const __m128i stg4_5 = pair_set_epi16(cospi_24_64, cospi_8_64);
-  const __m128i stg4_6 = pair_set_epi16(-cospi_24_64, -cospi_8_64);
-  const __m128i stg4_7 = pair_set_epi16(-cospi_8_64, cospi_24_64);
-
-  const __m128i stg6_0 = pair_set_epi16(-cospi_16_64, cospi_16_64);
-
-  __m128i in[16], l[16], r[16], *curr1;
-  __m128i stp1_0, stp1_1, stp1_2, stp1_3, stp1_4, stp1_5, stp1_6, stp1_7,
-          stp1_8, stp1_9, stp1_10, stp1_11, stp1_12, stp1_13, stp1_14, stp1_15,
-          stp1_8_0, stp1_12_0;
-  __m128i stp2_0, stp2_1, stp2_2, stp2_3, stp2_4, stp2_5, stp2_6, stp2_7,
-          stp2_8, stp2_9, stp2_10, stp2_11, stp2_12, stp2_13, stp2_14, stp2_15;
-  __m128i tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
-  int i;
-
-  curr1 = l;
-  for (i = 0; i < 2; i++) {
-    // 1-D idct
-
-    // Load input data.
-    in[0] = _mm_load_si128((const __m128i *)input);
-    in[8] = _mm_load_si128((const __m128i *)(input + 8 * 1));
-    in[1] = _mm_load_si128((const __m128i *)(input + 8 * 2));
-    in[9] = _mm_load_si128((const __m128i *)(input + 8 * 3));
-    in[2] = _mm_load_si128((const __m128i *)(input + 8 * 4));
-    in[10] = _mm_load_si128((const __m128i *)(input + 8 * 5));
-    in[3] = _mm_load_si128((const __m128i *)(input + 8 * 6));
-    in[11] = _mm_load_si128((const __m128i *)(input + 8 * 7));
-    in[4] = _mm_load_si128((const __m128i *)(input + 8 * 8));
-    in[12] = _mm_load_si128((const __m128i *)(input + 8 * 9));
-    in[5] = _mm_load_si128((const __m128i *)(input + 8 * 10));
-    in[13] = _mm_load_si128((const __m128i *)(input + 8 * 11));
-    in[6] = _mm_load_si128((const __m128i *)(input + 8 * 12));
-    in[14] = _mm_load_si128((const __m128i *)(input + 8 * 13));
-    in[7] = _mm_load_si128((const __m128i *)(input + 8 * 14));
-    in[15] = _mm_load_si128((const __m128i *)(input + 8 * 15));
-
-    array_transpose_8x8(in, in);
-    array_transpose_8x8(in + 8, in + 8);
-
-    IDCT16
-
-    // Stage7
-    curr1[0] = _mm_add_epi16(stp2_0, stp1_15);
-    curr1[1] = _mm_add_epi16(stp2_1, stp1_14);
-    curr1[2] = _mm_add_epi16(stp2_2, stp2_13);
-    curr1[3] = _mm_add_epi16(stp2_3, stp2_12);
-    curr1[4] = _mm_add_epi16(stp2_4, stp2_11);
-    curr1[5] = _mm_add_epi16(stp2_5, stp2_10);
-    curr1[6] = _mm_add_epi16(stp2_6, stp1_9);
-    curr1[7] = _mm_add_epi16(stp2_7, stp1_8);
-    curr1[8] = _mm_sub_epi16(stp2_7, stp1_8);
-    curr1[9] = _mm_sub_epi16(stp2_6, stp1_9);
-    curr1[10] = _mm_sub_epi16(stp2_5, stp2_10);
-    curr1[11] = _mm_sub_epi16(stp2_4, stp2_11);
-    curr1[12] = _mm_sub_epi16(stp2_3, stp2_12);
-    curr1[13] = _mm_sub_epi16(stp2_2, stp2_13);
-    curr1[14] = _mm_sub_epi16(stp2_1, stp1_14);
-    curr1[15] = _mm_sub_epi16(stp2_0, stp1_15);
-
-    curr1 = r;
-    input += 128;
-  }
-  for (i = 0; i < 2; i++) {
-    int j;
-    // 1-D idct
-    array_transpose_8x8(l + i * 8, in);
-    array_transpose_8x8(r + i * 8, in + 8);
-
-    IDCT16
-
-    // 2-D
-    in[0] = _mm_add_epi16(stp2_0, stp1_15);
-    in[1] = _mm_add_epi16(stp2_1, stp1_14);
-    in[2] = _mm_add_epi16(stp2_2, stp2_13);
-    in[3] = _mm_add_epi16(stp2_3, stp2_12);
-    in[4] = _mm_add_epi16(stp2_4, stp2_11);
-    in[5] = _mm_add_epi16(stp2_5, stp2_10);
-    in[6] = _mm_add_epi16(stp2_6, stp1_9);
-    in[7] = _mm_add_epi16(stp2_7, stp1_8);
-    in[8] = _mm_sub_epi16(stp2_7, stp1_8);
-    in[9] = _mm_sub_epi16(stp2_6, stp1_9);
-    in[10] = _mm_sub_epi16(stp2_5, stp2_10);
-    in[11] = _mm_sub_epi16(stp2_4, stp2_11);
-    in[12] = _mm_sub_epi16(stp2_3, stp2_12);
-    in[13] = _mm_sub_epi16(stp2_2, stp2_13);
-    in[14] = _mm_sub_epi16(stp2_1, stp1_14);
-    in[15] = _mm_sub_epi16(stp2_0, stp1_15);
-
-    for (j = 0; j < 16; ++j) {
-      // Final rounding and shift
-      in[j] = _mm_adds_epi16(in[j], final_rounding);
-      in[j] = _mm_srai_epi16(in[j], 6);
-      RECON_AND_STORE(dest + j * stride, in[j]);
-    }
-
-    dest += 8;
-  }
-}
-
-void vp9_idct16x16_1_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
-  __m128i dc_value;
-  const __m128i zero = _mm_setzero_si128();
-  int a, i;
-
-  a = dct_const_round_shift(input[0] * cospi_16_64);
-  a = dct_const_round_shift(a * cospi_16_64);
-  a = ROUND_POWER_OF_TWO(a, 6);
-
-  dc_value = _mm_set1_epi16(a);
-
-  for (i = 0; i < 2; ++i) {
-    RECON_AND_STORE(dest +  0 * stride, dc_value);
-    RECON_AND_STORE(dest +  1 * stride, dc_value);
-    RECON_AND_STORE(dest +  2 * stride, dc_value);
-    RECON_AND_STORE(dest +  3 * stride, dc_value);
-    RECON_AND_STORE(dest +  4 * stride, dc_value);
-    RECON_AND_STORE(dest +  5 * stride, dc_value);
-    RECON_AND_STORE(dest +  6 * stride, dc_value);
-    RECON_AND_STORE(dest +  7 * stride, dc_value);
-    RECON_AND_STORE(dest +  8 * stride, dc_value);
-    RECON_AND_STORE(dest +  9 * stride, dc_value);
-    RECON_AND_STORE(dest + 10 * stride, dc_value);
-    RECON_AND_STORE(dest + 11 * stride, dc_value);
-    RECON_AND_STORE(dest + 12 * stride, dc_value);
-    RECON_AND_STORE(dest + 13 * stride, dc_value);
-    RECON_AND_STORE(dest + 14 * stride, dc_value);
-    RECON_AND_STORE(dest + 15 * stride, dc_value);
-    dest += 8;
-  }
-}
-
-static void iadst16_8col(__m128i *in) {
-  // perform 16x16 1-D ADST for 8 columns
-  __m128i s[16], x[16], u[32], v[32];
-  const __m128i k__cospi_p01_p31 = pair_set_epi16(cospi_1_64, cospi_31_64);
-  const __m128i k__cospi_p31_m01 = pair_set_epi16(cospi_31_64, -cospi_1_64);
-  const __m128i k__cospi_p05_p27 = pair_set_epi16(cospi_5_64, cospi_27_64);
-  const __m128i k__cospi_p27_m05 = pair_set_epi16(cospi_27_64, -cospi_5_64);
-  const __m128i k__cospi_p09_p23 = pair_set_epi16(cospi_9_64, cospi_23_64);
-  const __m128i k__cospi_p23_m09 = pair_set_epi16(cospi_23_64, -cospi_9_64);
-  const __m128i k__cospi_p13_p19 = pair_set_epi16(cospi_13_64, cospi_19_64);
-  const __m128i k__cospi_p19_m13 = pair_set_epi16(cospi_19_64, -cospi_13_64);
-  const __m128i k__cospi_p17_p15 = pair_set_epi16(cospi_17_64, cospi_15_64);
-  const __m128i k__cospi_p15_m17 = pair_set_epi16(cospi_15_64, -cospi_17_64);
-  const __m128i k__cospi_p21_p11 = pair_set_epi16(cospi_21_64, cospi_11_64);
-  const __m128i k__cospi_p11_m21 = pair_set_epi16(cospi_11_64, -cospi_21_64);
-  const __m128i k__cospi_p25_p07 = pair_set_epi16(cospi_25_64, cospi_7_64);
-  const __m128i k__cospi_p07_m25 = pair_set_epi16(cospi_7_64, -cospi_25_64);
-  const __m128i k__cospi_p29_p03 = pair_set_epi16(cospi_29_64, cospi_3_64);
-  const __m128i k__cospi_p03_m29 = pair_set_epi16(cospi_3_64, -cospi_29_64);
-  const __m128i k__cospi_p04_p28 = pair_set_epi16(cospi_4_64, cospi_28_64);
-  const __m128i k__cospi_p28_m04 = pair_set_epi16(cospi_28_64, -cospi_4_64);
-  const __m128i k__cospi_p20_p12 = pair_set_epi16(cospi_20_64, cospi_12_64);
-  const __m128i k__cospi_p12_m20 = pair_set_epi16(cospi_12_64, -cospi_20_64);
-  const __m128i k__cospi_m28_p04 = pair_set_epi16(-cospi_28_64, cospi_4_64);
-  const __m128i k__cospi_m12_p20 = pair_set_epi16(-cospi_12_64, cospi_20_64);
-  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);
-  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);
-  const __m128i k__cospi_m24_p08 = pair_set_epi16(-cospi_24_64, cospi_8_64);
-  const __m128i k__cospi_m16_m16 = _mm_set1_epi16((int16_t)-cospi_16_64);
-  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);
-  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);
-  const __m128i k__cospi_m16_p16 = pair_set_epi16(-cospi_16_64, cospi_16_64);
-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
-  const __m128i kZero = _mm_set1_epi16(0);
-
-  u[0] = _mm_unpacklo_epi16(in[15], in[0]);
-  u[1] = _mm_unpackhi_epi16(in[15], in[0]);
-  u[2] = _mm_unpacklo_epi16(in[13], in[2]);
-  u[3] = _mm_unpackhi_epi16(in[13], in[2]);
-  u[4] = _mm_unpacklo_epi16(in[11], in[4]);
-  u[5] = _mm_unpackhi_epi16(in[11], in[4]);
-  u[6] = _mm_unpacklo_epi16(in[9], in[6]);
-  u[7] = _mm_unpackhi_epi16(in[9], in[6]);
-  u[8] = _mm_unpacklo_epi16(in[7], in[8]);
-  u[9] = _mm_unpackhi_epi16(in[7], in[8]);
-  u[10] = _mm_unpacklo_epi16(in[5], in[10]);
-  u[11] = _mm_unpackhi_epi16(in[5], in[10]);
-  u[12] = _mm_unpacklo_epi16(in[3], in[12]);
-  u[13] = _mm_unpackhi_epi16(in[3], in[12]);
-  u[14] = _mm_unpacklo_epi16(in[1], in[14]);
-  u[15] = _mm_unpackhi_epi16(in[1], in[14]);
-
-  v[0] = _mm_madd_epi16(u[0], k__cospi_p01_p31);
-  v[1] = _mm_madd_epi16(u[1], k__cospi_p01_p31);
-  v[2] = _mm_madd_epi16(u[0], k__cospi_p31_m01);
-  v[3] = _mm_madd_epi16(u[1], k__cospi_p31_m01);
-  v[4] = _mm_madd_epi16(u[2], k__cospi_p05_p27);
-  v[5] = _mm_madd_epi16(u[3], k__cospi_p05_p27);
-  v[6] = _mm_madd_epi16(u[2], k__cospi_p27_m05);
-  v[7] = _mm_madd_epi16(u[3], k__cospi_p27_m05);
-  v[8] = _mm_madd_epi16(u[4], k__cospi_p09_p23);
-  v[9] = _mm_madd_epi16(u[5], k__cospi_p09_p23);
-  v[10] = _mm_madd_epi16(u[4], k__cospi_p23_m09);
-  v[11] = _mm_madd_epi16(u[5], k__cospi_p23_m09);
-  v[12] = _mm_madd_epi16(u[6], k__cospi_p13_p19);
-  v[13] = _mm_madd_epi16(u[7], k__cospi_p13_p19);
-  v[14] = _mm_madd_epi16(u[6], k__cospi_p19_m13);
-  v[15] = _mm_madd_epi16(u[7], k__cospi_p19_m13);
-  v[16] = _mm_madd_epi16(u[8], k__cospi_p17_p15);
-  v[17] = _mm_madd_epi16(u[9], k__cospi_p17_p15);
-  v[18] = _mm_madd_epi16(u[8], k__cospi_p15_m17);
-  v[19] = _mm_madd_epi16(u[9], k__cospi_p15_m17);
-  v[20] = _mm_madd_epi16(u[10], k__cospi_p21_p11);
-  v[21] = _mm_madd_epi16(u[11], k__cospi_p21_p11);
-  v[22] = _mm_madd_epi16(u[10], k__cospi_p11_m21);
-  v[23] = _mm_madd_epi16(u[11], k__cospi_p11_m21);
-  v[24] = _mm_madd_epi16(u[12], k__cospi_p25_p07);
-  v[25] = _mm_madd_epi16(u[13], k__cospi_p25_p07);
-  v[26] = _mm_madd_epi16(u[12], k__cospi_p07_m25);
-  v[27] = _mm_madd_epi16(u[13], k__cospi_p07_m25);
-  v[28] = _mm_madd_epi16(u[14], k__cospi_p29_p03);
-  v[29] = _mm_madd_epi16(u[15], k__cospi_p29_p03);
-  v[30] = _mm_madd_epi16(u[14], k__cospi_p03_m29);
-  v[31] = _mm_madd_epi16(u[15], k__cospi_p03_m29);
-
-  u[0] = _mm_add_epi32(v[0], v[16]);
-  u[1] = _mm_add_epi32(v[1], v[17]);
-  u[2] = _mm_add_epi32(v[2], v[18]);
-  u[3] = _mm_add_epi32(v[3], v[19]);
-  u[4] = _mm_add_epi32(v[4], v[20]);
-  u[5] = _mm_add_epi32(v[5], v[21]);
-  u[6] = _mm_add_epi32(v[6], v[22]);
-  u[7] = _mm_add_epi32(v[7], v[23]);
-  u[8] = _mm_add_epi32(v[8], v[24]);
-  u[9] = _mm_add_epi32(v[9], v[25]);
-  u[10] = _mm_add_epi32(v[10], v[26]);
-  u[11] = _mm_add_epi32(v[11], v[27]);
-  u[12] = _mm_add_epi32(v[12], v[28]);
-  u[13] = _mm_add_epi32(v[13], v[29]);
-  u[14] = _mm_add_epi32(v[14], v[30]);
-  u[15] = _mm_add_epi32(v[15], v[31]);
-  u[16] = _mm_sub_epi32(v[0], v[16]);
-  u[17] = _mm_sub_epi32(v[1], v[17]);
-  u[18] = _mm_sub_epi32(v[2], v[18]);
-  u[19] = _mm_sub_epi32(v[3], v[19]);
-  u[20] = _mm_sub_epi32(v[4], v[20]);
-  u[21] = _mm_sub_epi32(v[5], v[21]);
-  u[22] = _mm_sub_epi32(v[6], v[22]);
-  u[23] = _mm_sub_epi32(v[7], v[23]);
-  u[24] = _mm_sub_epi32(v[8], v[24]);
-  u[25] = _mm_sub_epi32(v[9], v[25]);
-  u[26] = _mm_sub_epi32(v[10], v[26]);
-  u[27] = _mm_sub_epi32(v[11], v[27]);
-  u[28] = _mm_sub_epi32(v[12], v[28]);
-  u[29] = _mm_sub_epi32(v[13], v[29]);
-  u[30] = _mm_sub_epi32(v[14], v[30]);
-  u[31] = _mm_sub_epi32(v[15], v[31]);
-
-  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);
-  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);
-  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);
-  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);
-  v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);
-  v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);
-  v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);
-  v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);
-  v[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);
-  v[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);
-  v[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);
-  v[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);
-  v[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);
-  v[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);
-  v[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);
-  v[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);
-  v[16] = _mm_add_epi32(u[16], k__DCT_CONST_ROUNDING);
-  v[17] = _mm_add_epi32(u[17], k__DCT_CONST_ROUNDING);
-  v[18] = _mm_add_epi32(u[18], k__DCT_CONST_ROUNDING);
-  v[19] = _mm_add_epi32(u[19], k__DCT_CONST_ROUNDING);
-  v[20] = _mm_add_epi32(u[20], k__DCT_CONST_ROUNDING);
-  v[21] = _mm_add_epi32(u[21], k__DCT_CONST_ROUNDING);
-  v[22] = _mm_add_epi32(u[22], k__DCT_CONST_ROUNDING);
-  v[23] = _mm_add_epi32(u[23], k__DCT_CONST_ROUNDING);
-  v[24] = _mm_add_epi32(u[24], k__DCT_CONST_ROUNDING);
-  v[25] = _mm_add_epi32(u[25], k__DCT_CONST_ROUNDING);
-  v[26] = _mm_add_epi32(u[26], k__DCT_CONST_ROUNDING);
-  v[27] = _mm_add_epi32(u[27], k__DCT_CONST_ROUNDING);
-  v[28] = _mm_add_epi32(u[28], k__DCT_CONST_ROUNDING);
-  v[29] = _mm_add_epi32(u[29], k__DCT_CONST_ROUNDING);
-  v[30] = _mm_add_epi32(u[30], k__DCT_CONST_ROUNDING);
-  v[31] = _mm_add_epi32(u[31], k__DCT_CONST_ROUNDING);
-
-  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);
-  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);
-  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);
-  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);
-  u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);
-  u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);
-  u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);
-  u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);
-  u[8] = _mm_srai_epi32(v[8], DCT_CONST_BITS);
-  u[9] = _mm_srai_epi32(v[9], DCT_CONST_BITS);
-  u[10] = _mm_srai_epi32(v[10], DCT_CONST_BITS);
-  u[11] = _mm_srai_epi32(v[11], DCT_CONST_BITS);
-  u[12] = _mm_srai_epi32(v[12], DCT_CONST_BITS);
-  u[13] = _mm_srai_epi32(v[13], DCT_CONST_BITS);
-  u[14] = _mm_srai_epi32(v[14], DCT_CONST_BITS);
-  u[15] = _mm_srai_epi32(v[15], DCT_CONST_BITS);
-  u[16] = _mm_srai_epi32(v[16], DCT_CONST_BITS);
-  u[17] = _mm_srai_epi32(v[17], DCT_CONST_BITS);
-  u[18] = _mm_srai_epi32(v[18], DCT_CONST_BITS);
-  u[19] = _mm_srai_epi32(v[19], DCT_CONST_BITS);
-  u[20] = _mm_srai_epi32(v[20], DCT_CONST_BITS);
-  u[21] = _mm_srai_epi32(v[21], DCT_CONST_BITS);
-  u[22] = _mm_srai_epi32(v[22], DCT_CONST_BITS);
-  u[23] = _mm_srai_epi32(v[23], DCT_CONST_BITS);
-  u[24] = _mm_srai_epi32(v[24], DCT_CONST_BITS);
-  u[25] = _mm_srai_epi32(v[25], DCT_CONST_BITS);
-  u[26] = _mm_srai_epi32(v[26], DCT_CONST_BITS);
-  u[27] = _mm_srai_epi32(v[27], DCT_CONST_BITS);
-  u[28] = _mm_srai_epi32(v[28], DCT_CONST_BITS);
-  u[29] = _mm_srai_epi32(v[29], DCT_CONST_BITS);
-  u[30] = _mm_srai_epi32(v[30], DCT_CONST_BITS);
-  u[31] = _mm_srai_epi32(v[31], DCT_CONST_BITS);
-
-  s[0] = _mm_packs_epi32(u[0], u[1]);
-  s[1] = _mm_packs_epi32(u[2], u[3]);
-  s[2] = _mm_packs_epi32(u[4], u[5]);
-  s[3] = _mm_packs_epi32(u[6], u[7]);
-  s[4] = _mm_packs_epi32(u[8], u[9]);
-  s[5] = _mm_packs_epi32(u[10], u[11]);
-  s[6] = _mm_packs_epi32(u[12], u[13]);
-  s[7] = _mm_packs_epi32(u[14], u[15]);
-  s[8] = _mm_packs_epi32(u[16], u[17]);
-  s[9] = _mm_packs_epi32(u[18], u[19]);
-  s[10] = _mm_packs_epi32(u[20], u[21]);
-  s[11] = _mm_packs_epi32(u[22], u[23]);
-  s[12] = _mm_packs_epi32(u[24], u[25]);
-  s[13] = _mm_packs_epi32(u[26], u[27]);
-  s[14] = _mm_packs_epi32(u[28], u[29]);
-  s[15] = _mm_packs_epi32(u[30], u[31]);
-
-  // stage 2
-  u[0] = _mm_unpacklo_epi16(s[8], s[9]);
-  u[1] = _mm_unpackhi_epi16(s[8], s[9]);
-  u[2] = _mm_unpacklo_epi16(s[10], s[11]);
-  u[3] = _mm_unpackhi_epi16(s[10], s[11]);
-  u[4] = _mm_unpacklo_epi16(s[12], s[13]);
-  u[5] = _mm_unpackhi_epi16(s[12], s[13]);
-  u[6] = _mm_unpacklo_epi16(s[14], s[15]);
-  u[7] = _mm_unpackhi_epi16(s[14], s[15]);
-
-  v[0] = _mm_madd_epi16(u[0], k__cospi_p04_p28);
-  v[1] = _mm_madd_epi16(u[1], k__cospi_p04_p28);
-  v[2] = _mm_madd_epi16(u[0], k__cospi_p28_m04);
-  v[3] = _mm_madd_epi16(u[1], k__cospi_p28_m04);
-  v[4] = _mm_madd_epi16(u[2], k__cospi_p20_p12);
-  v[5] = _mm_madd_epi16(u[3], k__cospi_p20_p12);
-  v[6] = _mm_madd_epi16(u[2], k__cospi_p12_m20);
-  v[7] = _mm_madd_epi16(u[3], k__cospi_p12_m20);
-  v[8] = _mm_madd_epi16(u[4], k__cospi_m28_p04);
-  v[9] = _mm_madd_epi16(u[5], k__cospi_m28_p04);
-  v[10] = _mm_madd_epi16(u[4], k__cospi_p04_p28);
-  v[11] = _mm_madd_epi16(u[5], k__cospi_p04_p28);
-  v[12] = _mm_madd_epi16(u[6], k__cospi_m12_p20);
-  v[13] = _mm_madd_epi16(u[7], k__cospi_m12_p20);
-  v[14] = _mm_madd_epi16(u[6], k__cospi_p20_p12);
-  v[15] = _mm_madd_epi16(u[7], k__cospi_p20_p12);
-
-  u[0] = _mm_add_epi32(v[0], v[8]);
-  u[1] = _mm_add_epi32(v[1], v[9]);
-  u[2] = _mm_add_epi32(v[2], v[10]);
-  u[3] = _mm_add_epi32(v[3], v[11]);
-  u[4] = _mm_add_epi32(v[4], v[12]);
-  u[5] = _mm_add_epi32(v[5], v[13]);
-  u[6] = _mm_add_epi32(v[6], v[14]);
-  u[7] = _mm_add_epi32(v[7], v[15]);
-  u[8] = _mm_sub_epi32(v[0], v[8]);
-  u[9] = _mm_sub_epi32(v[1], v[9]);
-  u[10] = _mm_sub_epi32(v[2], v[10]);
-  u[11] = _mm_sub_epi32(v[3], v[11]);
-  u[12] = _mm_sub_epi32(v[4], v[12]);
-  u[13] = _mm_sub_epi32(v[5], v[13]);
-  u[14] = _mm_sub_epi32(v[6], v[14]);
-  u[15] = _mm_sub_epi32(v[7], v[15]);
-
-  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);
-  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);
-  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);
-  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);
-  v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);
-  v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);
-  v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);
-  v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);
-  v[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);
-  v[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);
-  v[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);
-  v[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);
-  v[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);
-  v[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);
-  v[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);
-  v[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);
-
-  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);
-  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);
-  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);
-  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);
-  u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);
-  u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);
-  u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);
-  u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);
-  u[8] = _mm_srai_epi32(v[8], DCT_CONST_BITS);
-  u[9] = _mm_srai_epi32(v[9], DCT_CONST_BITS);
-  u[10] = _mm_srai_epi32(v[10], DCT_CONST_BITS);
-  u[11] = _mm_srai_epi32(v[11], DCT_CONST_BITS);
-  u[12] = _mm_srai_epi32(v[12], DCT_CONST_BITS);
-  u[13] = _mm_srai_epi32(v[13], DCT_CONST_BITS);
-  u[14] = _mm_srai_epi32(v[14], DCT_CONST_BITS);
-  u[15] = _mm_srai_epi32(v[15], DCT_CONST_BITS);
-
-  x[0] = _mm_add_epi16(s[0], s[4]);
-  x[1] = _mm_add_epi16(s[1], s[5]);
-  x[2] = _mm_add_epi16(s[2], s[6]);
-  x[3] = _mm_add_epi16(s[3], s[7]);
-  x[4] = _mm_sub_epi16(s[0], s[4]);
-  x[5] = _mm_sub_epi16(s[1], s[5]);
-  x[6] = _mm_sub_epi16(s[2], s[6]);
-  x[7] = _mm_sub_epi16(s[3], s[7]);
-  x[8] = _mm_packs_epi32(u[0], u[1]);
-  x[9] = _mm_packs_epi32(u[2], u[3]);
-  x[10] = _mm_packs_epi32(u[4], u[5]);
-  x[11] = _mm_packs_epi32(u[6], u[7]);
-  x[12] = _mm_packs_epi32(u[8], u[9]);
-  x[13] = _mm_packs_epi32(u[10], u[11]);
-  x[14] = _mm_packs_epi32(u[12], u[13]);
-  x[15] = _mm_packs_epi32(u[14], u[15]);
-
-  // stage 3
-  u[0] = _mm_unpacklo_epi16(x[4], x[5]);
-  u[1] = _mm_unpackhi_epi16(x[4], x[5]);
-  u[2] = _mm_unpacklo_epi16(x[6], x[7]);
-  u[3] = _mm_unpackhi_epi16(x[6], x[7]);
-  u[4] = _mm_unpacklo_epi16(x[12], x[13]);
-  u[5] = _mm_unpackhi_epi16(x[12], x[13]);
-  u[6] = _mm_unpacklo_epi16(x[14], x[15]);
-  u[7] = _mm_unpackhi_epi16(x[14], x[15]);
-
-  v[0] = _mm_madd_epi16(u[0], k__cospi_p08_p24);
-  v[1] = _mm_madd_epi16(u[1], k__cospi_p08_p24);
-  v[2] = _mm_madd_epi16(u[0], k__cospi_p24_m08);
-  v[3] = _mm_madd_epi16(u[1], k__cospi_p24_m08);
-  v[4] = _mm_madd_epi16(u[2], k__cospi_m24_p08);
-  v[5] = _mm_madd_epi16(u[3], k__cospi_m24_p08);
-  v[6] = _mm_madd_epi16(u[2], k__cospi_p08_p24);
-  v[7] = _mm_madd_epi16(u[3], k__cospi_p08_p24);
-  v[8] = _mm_madd_epi16(u[4], k__cospi_p08_p24);
-  v[9] = _mm_madd_epi16(u[5], k__cospi_p08_p24);
-  v[10] = _mm_madd_epi16(u[4], k__cospi_p24_m08);
-  v[11] = _mm_madd_epi16(u[5], k__cospi_p24_m08);
-  v[12] = _mm_madd_epi16(u[6], k__cospi_m24_p08);
-  v[13] = _mm_madd_epi16(u[7], k__cospi_m24_p08);
-  v[14] = _mm_madd_epi16(u[6], k__cospi_p08_p24);
-  v[15] = _mm_madd_epi16(u[7], k__cospi_p08_p24);
-
-  u[0] = _mm_add_epi32(v[0], v[4]);
-  u[1] = _mm_add_epi32(v[1], v[5]);
-  u[2] = _mm_add_epi32(v[2], v[6]);
-  u[3] = _mm_add_epi32(v[3], v[7]);
-  u[4] = _mm_sub_epi32(v[0], v[4]);
-  u[5] = _mm_sub_epi32(v[1], v[5]);
-  u[6] = _mm_sub_epi32(v[2], v[6]);
-  u[7] = _mm_sub_epi32(v[3], v[7]);
-  u[8] = _mm_add_epi32(v[8], v[12]);
-  u[9] = _mm_add_epi32(v[9], v[13]);
-  u[10] = _mm_add_epi32(v[10], v[14]);
-  u[11] = _mm_add_epi32(v[11], v[15]);
-  u[12] = _mm_sub_epi32(v[8], v[12]);
-  u[13] = _mm_sub_epi32(v[9], v[13]);
-  u[14] = _mm_sub_epi32(v[10], v[14]);
-  u[15] = _mm_sub_epi32(v[11], v[15]);
-
-  u[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);
-  u[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);
-  u[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);
-  u[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);
-  u[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);
-  u[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);
-  u[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);
-  u[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);
-  u[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);
-  u[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);
-  u[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);
-  u[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);
-  u[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);
-  u[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);
-  u[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);
-  u[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);
-
-  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
-  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
-  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
-  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
-  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);
-  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);
-  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);
-  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);
-  v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);
-  v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);
-  v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);
-  v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);
-  v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);
-  v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);
-  v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);
-  v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);
-
-  s[0] = _mm_add_epi16(x[0], x[2]);
-  s[1] = _mm_add_epi16(x[1], x[3]);
-  s[2] = _mm_sub_epi16(x[0], x[2]);
-  s[3] = _mm_sub_epi16(x[1], x[3]);
-  s[4] = _mm_packs_epi32(v[0], v[1]);
-  s[5] = _mm_packs_epi32(v[2], v[3]);
-  s[6] = _mm_packs_epi32(v[4], v[5]);
-  s[7] = _mm_packs_epi32(v[6], v[7]);
-  s[8] = _mm_add_epi16(x[8], x[10]);
-  s[9] = _mm_add_epi16(x[9], x[11]);
-  s[10] = _mm_sub_epi16(x[8], x[10]);
-  s[11] = _mm_sub_epi16(x[9], x[11]);
-  s[12] = _mm_packs_epi32(v[8], v[9]);
-  s[13] = _mm_packs_epi32(v[10], v[11]);
-  s[14] = _mm_packs_epi32(v[12], v[13]);
-  s[15] = _mm_packs_epi32(v[14], v[15]);
-
-  // stage 4
-  u[0] = _mm_unpacklo_epi16(s[2], s[3]);
-  u[1] = _mm_unpackhi_epi16(s[2], s[3]);
-  u[2] = _mm_unpacklo_epi16(s[6], s[7]);
-  u[3] = _mm_unpackhi_epi16(s[6], s[7]);
-  u[4] = _mm_unpacklo_epi16(s[10], s[11]);
-  u[5] = _mm_unpackhi_epi16(s[10], s[11]);
-  u[6] = _mm_unpacklo_epi16(s[14], s[15]);
-  u[7] = _mm_unpackhi_epi16(s[14], s[15]);
-
-  v[0] = _mm_madd_epi16(u[0], k__cospi_m16_m16);
-  v[1] = _mm_madd_epi16(u[1], k__cospi_m16_m16);
-  v[2] = _mm_madd_epi16(u[0], k__cospi_p16_m16);
-  v[3] = _mm_madd_epi16(u[1], k__cospi_p16_m16);
-  v[4] = _mm_madd_epi16(u[2], k__cospi_p16_p16);
-  v[5] = _mm_madd_epi16(u[3], k__cospi_p16_p16);
-  v[6] = _mm_madd_epi16(u[2], k__cospi_m16_p16);
-  v[7] = _mm_madd_epi16(u[3], k__cospi_m16_p16);
-  v[8] = _mm_madd_epi16(u[4], k__cospi_p16_p16);
-  v[9] = _mm_madd_epi16(u[5], k__cospi_p16_p16);
-  v[10] = _mm_madd_epi16(u[4], k__cospi_m16_p16);
-  v[11] = _mm_madd_epi16(u[5], k__cospi_m16_p16);
-  v[12] = _mm_madd_epi16(u[6], k__cospi_m16_m16);
-  v[13] = _mm_madd_epi16(u[7], k__cospi_m16_m16);
-  v[14] = _mm_madd_epi16(u[6], k__cospi_p16_m16);
-  v[15] = _mm_madd_epi16(u[7], k__cospi_p16_m16);
-
-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
-  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);
-  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);
-  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);
-  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);
-  u[8] = _mm_add_epi32(v[8], k__DCT_CONST_ROUNDING);
-  u[9] = _mm_add_epi32(v[9], k__DCT_CONST_ROUNDING);
-  u[10] = _mm_add_epi32(v[10], k__DCT_CONST_ROUNDING);
-  u[11] = _mm_add_epi32(v[11], k__DCT_CONST_ROUNDING);
-  u[12] = _mm_add_epi32(v[12], k__DCT_CONST_ROUNDING);
-  u[13] = _mm_add_epi32(v[13], k__DCT_CONST_ROUNDING);
-  u[14] = _mm_add_epi32(v[14], k__DCT_CONST_ROUNDING);
-  u[15] = _mm_add_epi32(v[15], k__DCT_CONST_ROUNDING);
-
-  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
-  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
-  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
-  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
-  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);
-  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);
-  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);
-  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);
-  v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);
-  v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);
-  v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);
-  v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);
-  v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);
-  v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);
-  v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);
-  v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);
-
-  in[0] = s[0];
-  in[1] = _mm_sub_epi16(kZero, s[8]);
-  in[2] = s[12];
-  in[3] = _mm_sub_epi16(kZero, s[4]);
-  in[4] = _mm_packs_epi32(v[4], v[5]);
-  in[5] = _mm_packs_epi32(v[12], v[13]);
-  in[6] = _mm_packs_epi32(v[8], v[9]);
-  in[7] = _mm_packs_epi32(v[0], v[1]);
-  in[8] = _mm_packs_epi32(v[2], v[3]);
-  in[9] = _mm_packs_epi32(v[10], v[11]);
-  in[10] = _mm_packs_epi32(v[14], v[15]);
-  in[11] = _mm_packs_epi32(v[6], v[7]);
-  in[12] = s[5];
-  in[13] = _mm_sub_epi16(kZero, s[13]);
-  in[14] = s[9];
-  in[15] = _mm_sub_epi16(kZero, s[1]);
-}
-
-static void idct16_8col(__m128i *in) {
-  const __m128i k__cospi_p30_m02 = pair_set_epi16(cospi_30_64, -cospi_2_64);
-  const __m128i k__cospi_p02_p30 = pair_set_epi16(cospi_2_64, cospi_30_64);
-  const __m128i k__cospi_p14_m18 = pair_set_epi16(cospi_14_64, -cospi_18_64);
-  const __m128i k__cospi_p18_p14 = pair_set_epi16(cospi_18_64, cospi_14_64);
-  const __m128i k__cospi_p22_m10 = pair_set_epi16(cospi_22_64, -cospi_10_64);
-  const __m128i k__cospi_p10_p22 = pair_set_epi16(cospi_10_64, cospi_22_64);
-  const __m128i k__cospi_p06_m26 = pair_set_epi16(cospi_6_64, -cospi_26_64);
-  const __m128i k__cospi_p26_p06 = pair_set_epi16(cospi_26_64, cospi_6_64);
-  const __m128i k__cospi_p28_m04 = pair_set_epi16(cospi_28_64, -cospi_4_64);
-  const __m128i k__cospi_p04_p28 = pair_set_epi16(cospi_4_64, cospi_28_64);
-  const __m128i k__cospi_p12_m20 = pair_set_epi16(cospi_12_64, -cospi_20_64);
-  const __m128i k__cospi_p20_p12 = pair_set_epi16(cospi_20_64, cospi_12_64);
-  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);
-  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);
-  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);
-  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);
-  const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);
-  const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);
-  const __m128i k__cospi_m24_m08 = pair_set_epi16(-cospi_24_64, -cospi_8_64);
-  const __m128i k__cospi_m16_p16 = pair_set_epi16(-cospi_16_64, cospi_16_64);
-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
-  __m128i v[16], u[16], s[16], t[16];
-
-  // stage 1
-  s[0] = in[0];
-  s[1] = in[8];
-  s[2] = in[4];
-  s[3] = in[12];
-  s[4] = in[2];
-  s[5] = in[10];
-  s[6] = in[6];
-  s[7] = in[14];
-  s[8] = in[1];
-  s[9] = in[9];
-  s[10] = in[5];
-  s[11] = in[13];
-  s[12] = in[3];
-  s[13] = in[11];
-  s[14] = in[7];
-  s[15] = in[15];
-
-  // stage 2
-  u[0] = _mm_unpacklo_epi16(s[8], s[15]);
-  u[1] = _mm_unpackhi_epi16(s[8], s[15]);
-  u[2] = _mm_unpacklo_epi16(s[9], s[14]);
-  u[3] = _mm_unpackhi_epi16(s[9], s[14]);
-  u[4] = _mm_unpacklo_epi16(s[10], s[13]);
-  u[5] = _mm_unpackhi_epi16(s[10], s[13]);
-  u[6] = _mm_unpacklo_epi16(s[11], s[12]);
-  u[7] = _mm_unpackhi_epi16(s[11], s[12]);
-
-  v[0] = _mm_madd_epi16(u[0], k__cospi_p30_m02);
-  v[1] = _mm_madd_epi16(u[1], k__cospi_p30_m02);
-  v[2] = _mm_madd_epi16(u[0], k__cospi_p02_p30);
-  v[3] = _mm_madd_epi16(u[1], k__cospi_p02_p30);
-  v[4] = _mm_madd_epi16(u[2], k__cospi_p14_m18);
-  v[5] = _mm_madd_epi16(u[3], k__cospi_p14_m18);
-  v[6] = _mm_madd_epi16(u[2], k__cospi_p18_p14);
-  v[7] = _mm_madd_epi16(u[3], k__cospi_p18_p14);
-  v[8] = _mm_madd_epi16(u[4], k__cospi_p22_m10);
-  v[9] = _mm_madd_epi16(u[5], k__cospi_p22_m10);
-  v[10] = _mm_madd_epi16(u[4], k__cospi_p10_p22);
-  v[11] = _mm_madd_epi16(u[5], k__cospi_p10_p22);
-  v[12] = _mm_madd_epi16(u[6], k__cospi_p06_m26);
-  v[13] = _mm_madd_epi16(u[7], k__cospi_p06_m26);
-  v[14] = _mm_madd_epi16(u[6], k__cospi_p26_p06);
-  v[15] = _mm_madd_epi16(u[7], k__cospi_p26_p06);
-
-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
-  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);
-  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);
-  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);
-  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);
-  u[8] = _mm_add_epi32(v[8], k__DCT_CONST_ROUNDING);
-  u[9] = _mm_add_epi32(v[9], k__DCT_CONST_ROUNDING);
-  u[10] = _mm_add_epi32(v[10], k__DCT_CONST_ROUNDING);
-  u[11] = _mm_add_epi32(v[11], k__DCT_CONST_ROUNDING);
-  u[12] = _mm_add_epi32(v[12], k__DCT_CONST_ROUNDING);
-  u[13] = _mm_add_epi32(v[13], k__DCT_CONST_ROUNDING);
-  u[14] = _mm_add_epi32(v[14], k__DCT_CONST_ROUNDING);
-  u[15] = _mm_add_epi32(v[15], k__DCT_CONST_ROUNDING);
-
-  u[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
-  u[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
-  u[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
-  u[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
-  u[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);
-  u[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);
-  u[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);
-  u[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);
-  u[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);
-  u[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);
-  u[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);
-  u[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);
-  u[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);
-  u[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);
-  u[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);
-  u[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);
-
-  s[8]  = _mm_packs_epi32(u[0], u[1]);
-  s[15] = _mm_packs_epi32(u[2], u[3]);
-  s[9]  = _mm_packs_epi32(u[4], u[5]);
-  s[14] = _mm_packs_epi32(u[6], u[7]);
-  s[10] = _mm_packs_epi32(u[8], u[9]);
-  s[13] = _mm_packs_epi32(u[10], u[11]);
-  s[11] = _mm_packs_epi32(u[12], u[13]);
-  s[12] = _mm_packs_epi32(u[14], u[15]);
-
-  // stage 3
-  t[0] = s[0];
-  t[1] = s[1];
-  t[2] = s[2];
-  t[3] = s[3];
-  u[0] = _mm_unpacklo_epi16(s[4], s[7]);
-  u[1] = _mm_unpackhi_epi16(s[4], s[7]);
-  u[2] = _mm_unpacklo_epi16(s[5], s[6]);
-  u[3] = _mm_unpackhi_epi16(s[5], s[6]);
-
-  v[0] = _mm_madd_epi16(u[0], k__cospi_p28_m04);
-  v[1] = _mm_madd_epi16(u[1], k__cospi_p28_m04);
-  v[2] = _mm_madd_epi16(u[0], k__cospi_p04_p28);
-  v[3] = _mm_madd_epi16(u[1], k__cospi_p04_p28);
-  v[4] = _mm_madd_epi16(u[2], k__cospi_p12_m20);
-  v[5] = _mm_madd_epi16(u[3], k__cospi_p12_m20);
-  v[6] = _mm_madd_epi16(u[2], k__cospi_p20_p12);
-  v[7] = _mm_madd_epi16(u[3], k__cospi_p20_p12);
-
-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
-  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);
-  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);
-  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);
-  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);
-
-  u[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
-  u[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
-  u[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
-  u[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
-  u[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);
-  u[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);
-  u[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);
-  u[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);
-
-  t[4] = _mm_packs_epi32(u[0], u[1]);
-  t[7] = _mm_packs_epi32(u[2], u[3]);
-  t[5] = _mm_packs_epi32(u[4], u[5]);
-  t[6] = _mm_packs_epi32(u[6], u[7]);
-  t[8] = _mm_add_epi16(s[8], s[9]);
-  t[9] = _mm_sub_epi16(s[8], s[9]);
-  t[10] = _mm_sub_epi16(s[11], s[10]);
-  t[11] = _mm_add_epi16(s[10], s[11]);
-  t[12] = _mm_add_epi16(s[12], s[13]);
-  t[13] = _mm_sub_epi16(s[12], s[13]);
-  t[14] = _mm_sub_epi16(s[15], s[14]);
-  t[15] = _mm_add_epi16(s[14], s[15]);
-
-  // stage 4
-  u[0] = _mm_unpacklo_epi16(t[0], t[1]);
-  u[1] = _mm_unpackhi_epi16(t[0], t[1]);
-  u[2] = _mm_unpacklo_epi16(t[2], t[3]);
-  u[3] = _mm_unpackhi_epi16(t[2], t[3]);
-  u[4] = _mm_unpacklo_epi16(t[9], t[14]);
-  u[5] = _mm_unpackhi_epi16(t[9], t[14]);
-  u[6] = _mm_unpacklo_epi16(t[10], t[13]);
-  u[7] = _mm_unpackhi_epi16(t[10], t[13]);
-
-  v[0] = _mm_madd_epi16(u[0], k__cospi_p16_p16);
-  v[1] = _mm_madd_epi16(u[1], k__cospi_p16_p16);
-  v[2] = _mm_madd_epi16(u[0], k__cospi_p16_m16);
-  v[3] = _mm_madd_epi16(u[1], k__cospi_p16_m16);
-  v[4] = _mm_madd_epi16(u[2], k__cospi_p24_m08);
-  v[5] = _mm_madd_epi16(u[3], k__cospi_p24_m08);
-  v[6] = _mm_madd_epi16(u[2], k__cospi_p08_p24);
-  v[7] = _mm_madd_epi16(u[3], k__cospi_p08_p24);
-  v[8] = _mm_madd_epi16(u[4], k__cospi_m08_p24);
-  v[9] = _mm_madd_epi16(u[5], k__cospi_m08_p24);
-  v[10] = _mm_madd_epi16(u[4], k__cospi_p24_p08);
-  v[11] = _mm_madd_epi16(u[5], k__cospi_p24_p08);
-  v[12] = _mm_madd_epi16(u[6], k__cospi_m24_m08);
-  v[13] = _mm_madd_epi16(u[7], k__cospi_m24_m08);
-  v[14] = _mm_madd_epi16(u[6], k__cospi_m08_p24);
-  v[15] = _mm_madd_epi16(u[7], k__cospi_m08_p24);
-
-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
-  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);
-  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);
-  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);
-  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);
-  u[8] = _mm_add_epi32(v[8], k__DCT_CONST_ROUNDING);
-  u[9] = _mm_add_epi32(v[9], k__DCT_CONST_ROUNDING);
-  u[10] = _mm_add_epi32(v[10], k__DCT_CONST_ROUNDING);
-  u[11] = _mm_add_epi32(v[11], k__DCT_CONST_ROUNDING);
-  u[12] = _mm_add_epi32(v[12], k__DCT_CONST_ROUNDING);
-  u[13] = _mm_add_epi32(v[13], k__DCT_CONST_ROUNDING);
-  u[14] = _mm_add_epi32(v[14], k__DCT_CONST_ROUNDING);
-  u[15] = _mm_add_epi32(v[15], k__DCT_CONST_ROUNDING);
-
-  u[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
-  u[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
-  u[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
-  u[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
-  u[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);
-  u[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);
-  u[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);
-  u[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);
-  u[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);
-  u[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);
-  u[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);
-  u[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);
-  u[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);
-  u[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);
-  u[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);
-  u[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);
-
-  s[0] = _mm_packs_epi32(u[0], u[1]);
-  s[1] = _mm_packs_epi32(u[2], u[3]);
-  s[2] = _mm_packs_epi32(u[4], u[5]);
-  s[3] = _mm_packs_epi32(u[6], u[7]);
-  s[4] = _mm_add_epi16(t[4], t[5]);
-  s[5] = _mm_sub_epi16(t[4], t[5]);
-  s[6] = _mm_sub_epi16(t[7], t[6]);
-  s[7] = _mm_add_epi16(t[6], t[7]);
-  s[8] = t[8];
-  s[15] = t[15];
-  s[9]  = _mm_packs_epi32(u[8], u[9]);
-  s[14] = _mm_packs_epi32(u[10], u[11]);
-  s[10] = _mm_packs_epi32(u[12], u[13]);
-  s[13] = _mm_packs_epi32(u[14], u[15]);
-  s[11] = t[11];
-  s[12] = t[12];
-
-  // stage 5
-  t[0] = _mm_add_epi16(s[0], s[3]);
-  t[1] = _mm_add_epi16(s[1], s[2]);
-  t[2] = _mm_sub_epi16(s[1], s[2]);
-  t[3] = _mm_sub_epi16(s[0], s[3]);
-  t[4] = s[4];
-  t[7] = s[7];
-
-  u[0] = _mm_unpacklo_epi16(s[5], s[6]);
-  u[1] = _mm_unpackhi_epi16(s[5], s[6]);
-  v[0] = _mm_madd_epi16(u[0], k__cospi_m16_p16);
-  v[1] = _mm_madd_epi16(u[1], k__cospi_m16_p16);
-  v[2] = _mm_madd_epi16(u[0], k__cospi_p16_p16);
-  v[3] = _mm_madd_epi16(u[1], k__cospi_p16_p16);
-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
-  u[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
-  u[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
-  u[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
-  u[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
-  t[5] = _mm_packs_epi32(u[0], u[1]);
-  t[6] = _mm_packs_epi32(u[2], u[3]);
-
-  t[8] = _mm_add_epi16(s[8], s[11]);
-  t[9] = _mm_add_epi16(s[9], s[10]);
-  t[10] = _mm_sub_epi16(s[9], s[10]);
-  t[11] = _mm_sub_epi16(s[8], s[11]);
-  t[12] = _mm_sub_epi16(s[15], s[12]);
-  t[13] = _mm_sub_epi16(s[14], s[13]);
-  t[14] = _mm_add_epi16(s[13], s[14]);
-  t[15] = _mm_add_epi16(s[12], s[15]);
-
-  // stage 6
-  s[0] = _mm_add_epi16(t[0], t[7]);
-  s[1] = _mm_add_epi16(t[1], t[6]);
-  s[2] = _mm_add_epi16(t[2], t[5]);
-  s[3] = _mm_add_epi16(t[3], t[4]);
-  s[4] = _mm_sub_epi16(t[3], t[4]);
-  s[5] = _mm_sub_epi16(t[2], t[5]);
-  s[6] = _mm_sub_epi16(t[1], t[6]);
-  s[7] = _mm_sub_epi16(t[0], t[7]);
-  s[8] = t[8];
-  s[9] = t[9];
-
-  u[0] = _mm_unpacklo_epi16(t[10], t[13]);
-  u[1] = _mm_unpackhi_epi16(t[10], t[13]);
-  u[2] = _mm_unpacklo_epi16(t[11], t[12]);
-  u[3] = _mm_unpackhi_epi16(t[11], t[12]);
-
-  v[0] = _mm_madd_epi16(u[0], k__cospi_m16_p16);
-  v[1] = _mm_madd_epi16(u[1], k__cospi_m16_p16);
-  v[2] = _mm_madd_epi16(u[0], k__cospi_p16_p16);
-  v[3] = _mm_madd_epi16(u[1], k__cospi_p16_p16);
-  v[4] = _mm_madd_epi16(u[2], k__cospi_m16_p16);
-  v[5] = _mm_madd_epi16(u[3], k__cospi_m16_p16);
-  v[6] = _mm_madd_epi16(u[2], k__cospi_p16_p16);
-  v[7] = _mm_madd_epi16(u[3], k__cospi_p16_p16);
-
-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
-  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);
-  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);
-  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);
-  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);
-
-  u[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
-  u[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
-  u[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
-  u[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
-  u[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);
-  u[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);
-  u[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);
-  u[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);
-
-  s[10] = _mm_packs_epi32(u[0], u[1]);
-  s[13] = _mm_packs_epi32(u[2], u[3]);
-  s[11] = _mm_packs_epi32(u[4], u[5]);
-  s[12] = _mm_packs_epi32(u[6], u[7]);
-  s[14] = t[14];
-  s[15] = t[15];
-
-  // stage 7
-  in[0] = _mm_add_epi16(s[0], s[15]);
-  in[1] = _mm_add_epi16(s[1], s[14]);
-  in[2] = _mm_add_epi16(s[2], s[13]);
-  in[3] = _mm_add_epi16(s[3], s[12]);
-  in[4] = _mm_add_epi16(s[4], s[11]);
-  in[5] = _mm_add_epi16(s[5], s[10]);
-  in[6] = _mm_add_epi16(s[6], s[9]);
-  in[7] = _mm_add_epi16(s[7], s[8]);
-  in[8] = _mm_sub_epi16(s[7], s[8]);
-  in[9] = _mm_sub_epi16(s[6], s[9]);
-  in[10] = _mm_sub_epi16(s[5], s[10]);
-  in[11] = _mm_sub_epi16(s[4], s[11]);
-  in[12] = _mm_sub_epi16(s[3], s[12]);
-  in[13] = _mm_sub_epi16(s[2], s[13]);
-  in[14] = _mm_sub_epi16(s[1], s[14]);
-  in[15] = _mm_sub_epi16(s[0], s[15]);
-}
-
-static void idct16_sse2(__m128i *in0, __m128i *in1) {
-  array_transpose_16x16(in0, in1);
-  idct16_8col(in0);
-  idct16_8col(in1);
-}
-
-static void iadst16_sse2(__m128i *in0, __m128i *in1) {
-  array_transpose_16x16(in0, in1);
-  iadst16_8col(in0);
-  iadst16_8col(in1);
-}
-
 void vp9_iht16x16_256_add_sse2(const int16_t *input, uint8_t *dest, int stride,
                                int tx_type) {
   __m128i in0[16], in1[16];
@@ -2319,1905 +178,3 @@ void vp9_iht16x16_256_add_sse2(const int16_t *input, uint8_t *dest, int stride,
   dest += 8;
   write_buffer_8x16(dest, in1, stride);
 }
-
-void vp9_idct16x16_10_add_sse2(const int16_t *input, uint8_t *dest,
-                               int stride) {
-  const __m128i rounding = _mm_set1_epi32(DCT_CONST_ROUNDING);
-  const __m128i final_rounding = _mm_set1_epi16(1 << 5);
-  const __m128i zero = _mm_setzero_si128();
-
-  const __m128i stg2_0 = pair_set_epi16(cospi_30_64, -cospi_2_64);
-  const __m128i stg2_1 = pair_set_epi16(cospi_2_64, cospi_30_64);
-  const __m128i stg2_6 = pair_set_epi16(cospi_6_64, -cospi_26_64);
-  const __m128i stg2_7 = pair_set_epi16(cospi_26_64, cospi_6_64);
-
-  const __m128i stg3_0 = pair_set_epi16(cospi_28_64, -cospi_4_64);
-  const __m128i stg3_1 = pair_set_epi16(cospi_4_64, cospi_28_64);
-
-  const __m128i stg4_0 = pair_set_epi16(cospi_16_64, cospi_16_64);
-  const __m128i stg4_1 = pair_set_epi16(cospi_16_64, -cospi_16_64);
-  const __m128i stg4_4 = pair_set_epi16(-cospi_8_64, cospi_24_64);
-  const __m128i stg4_5 = pair_set_epi16(cospi_24_64, cospi_8_64);
-  const __m128i stg4_6 = pair_set_epi16(-cospi_24_64, -cospi_8_64);
-  const __m128i stg4_7 = pair_set_epi16(-cospi_8_64, cospi_24_64);
-
-  const __m128i stg6_0 = pair_set_epi16(-cospi_16_64, cospi_16_64);
-  __m128i in[16], l[16];
-  __m128i stp1_0, stp1_1, stp1_2, stp1_3, stp1_4, stp1_5, stp1_6,
-          stp1_8, stp1_9, stp1_10, stp1_11, stp1_12, stp1_13, stp1_14, stp1_15,
-          stp1_8_0, stp1_12_0;
-  __m128i stp2_0, stp2_1, stp2_2, stp2_3, stp2_4, stp2_5, stp2_6, stp2_7,
-          stp2_8, stp2_9, stp2_10, stp2_11, stp2_12, stp2_13, stp2_14;
-  __m128i tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
-  int i;
-  // First 1-D inverse DCT
-  // Load input data.
-  in[0] = _mm_load_si128((const __m128i *)input);
-  in[1] = _mm_load_si128((const __m128i *)(input + 8 * 2));
-  in[2] = _mm_load_si128((const __m128i *)(input + 8 * 4));
-  in[3] = _mm_load_si128((const __m128i *)(input + 8 * 6));
-
-  TRANSPOSE_8X4(in[0], in[1], in[2], in[3], in[0], in[1]);
-
-  // Stage2
-  {
-    const __m128i lo_1_15 = _mm_unpackhi_epi16(in[0], zero);
-    const __m128i lo_13_3 = _mm_unpackhi_epi16(zero, in[1]);
-
-    tmp0 = _mm_madd_epi16(lo_1_15, stg2_0);
-    tmp2 = _mm_madd_epi16(lo_1_15, stg2_1);
-    tmp5 = _mm_madd_epi16(lo_13_3, stg2_6);
-    tmp7 = _mm_madd_epi16(lo_13_3, stg2_7);
-
-    tmp0 = _mm_add_epi32(tmp0, rounding);
-    tmp2 = _mm_add_epi32(tmp2, rounding);
-    tmp5 = _mm_add_epi32(tmp5, rounding);
-    tmp7 = _mm_add_epi32(tmp7, rounding);
-
-    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS);
-    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS);
-    tmp5 = _mm_srai_epi32(tmp5, DCT_CONST_BITS);
-    tmp7 = _mm_srai_epi32(tmp7, DCT_CONST_BITS);
-
-    stp2_8  = _mm_packs_epi32(tmp0, tmp2);
-    stp2_11 = _mm_packs_epi32(tmp5, tmp7);
-  }
-
-  // Stage3
-  {
-    const __m128i lo_2_14 = _mm_unpacklo_epi16(in[1], zero);
-
-    tmp0 = _mm_madd_epi16(lo_2_14, stg3_0);
-    tmp2 = _mm_madd_epi16(lo_2_14, stg3_1);
-
-    tmp0 = _mm_add_epi32(tmp0, rounding);
-    tmp2 = _mm_add_epi32(tmp2, rounding);
-    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS);
-    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS);
-
-    stp1_13 = _mm_unpackhi_epi64(stp2_11, zero);
-    stp1_14 = _mm_unpackhi_epi64(stp2_8, zero);
-
-    stp1_4 = _mm_packs_epi32(tmp0, tmp2);
-  }
-
-  // Stage4
-  {
-    const __m128i lo_0_8 = _mm_unpacklo_epi16(in[0], zero);
-    const __m128i lo_9_14 = _mm_unpacklo_epi16(stp2_8, stp1_14);
-    const __m128i lo_10_13 = _mm_unpacklo_epi16(stp2_11, stp1_13);
-
-    tmp0 = _mm_madd_epi16(lo_0_8, stg4_0);
-    tmp2 = _mm_madd_epi16(lo_0_8, stg4_1);
-    tmp1 = _mm_madd_epi16(lo_9_14, stg4_4);
-    tmp3 = _mm_madd_epi16(lo_9_14, stg4_5);
-    tmp5 = _mm_madd_epi16(lo_10_13, stg4_6);
-    tmp7 = _mm_madd_epi16(lo_10_13, stg4_7);
-
-    tmp0 = _mm_add_epi32(tmp0, rounding);
-    tmp2 = _mm_add_epi32(tmp2, rounding);
-    tmp1 = _mm_add_epi32(tmp1, rounding);
-    tmp3 = _mm_add_epi32(tmp3, rounding);
-    tmp5 = _mm_add_epi32(tmp5, rounding);
-    tmp7 = _mm_add_epi32(tmp7, rounding);
-
-    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS);
-    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS);
-    tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS);
-    tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS);
-    tmp5 = _mm_srai_epi32(tmp5, DCT_CONST_BITS);
-    tmp7 = _mm_srai_epi32(tmp7, DCT_CONST_BITS);
-
-    stp1_0 = _mm_packs_epi32(tmp0, tmp0);
-    stp1_1 = _mm_packs_epi32(tmp2, tmp2);
-    stp2_9 = _mm_packs_epi32(tmp1, tmp3);
-    stp2_10 = _mm_packs_epi32(tmp5, tmp7);
-
-    stp2_6 = _mm_unpackhi_epi64(stp1_4, zero);
-  }
-
-  // Stage5 and Stage6
-  {
-    tmp0 = _mm_add_epi16(stp2_8, stp2_11);
-    tmp1 = _mm_sub_epi16(stp2_8, stp2_11);
-    tmp2 = _mm_add_epi16(stp2_9, stp2_10);
-    tmp3 = _mm_sub_epi16(stp2_9, stp2_10);
-
-    stp1_9  = _mm_unpacklo_epi64(tmp2, zero);
-    stp1_10 = _mm_unpacklo_epi64(tmp3, zero);
-    stp1_8  = _mm_unpacklo_epi64(tmp0, zero);
-    stp1_11 = _mm_unpacklo_epi64(tmp1, zero);
-
-    stp1_13 = _mm_unpackhi_epi64(tmp3, zero);
-    stp1_14 = _mm_unpackhi_epi64(tmp2, zero);
-    stp1_12 = _mm_unpackhi_epi64(tmp1, zero);
-    stp1_15 = _mm_unpackhi_epi64(tmp0, zero);
-  }
-
-  // Stage6
-  {
-    const __m128i lo_6_5 = _mm_unpacklo_epi16(stp2_6, stp1_4);
-    const __m128i lo_10_13 = _mm_unpacklo_epi16(stp1_10, stp1_13);
-    const __m128i lo_11_12 = _mm_unpacklo_epi16(stp1_11, stp1_12);
-
-    tmp1 = _mm_madd_epi16(lo_6_5, stg4_1);
-    tmp3 = _mm_madd_epi16(lo_6_5, stg4_0);
-    tmp0 = _mm_madd_epi16(lo_10_13, stg6_0);
-    tmp2 = _mm_madd_epi16(lo_10_13, stg4_0);
-    tmp4 = _mm_madd_epi16(lo_11_12, stg6_0);
-    tmp6 = _mm_madd_epi16(lo_11_12, stg4_0);
-
-    tmp1 = _mm_add_epi32(tmp1, rounding);
-    tmp3 = _mm_add_epi32(tmp3, rounding);
-    tmp0 = _mm_add_epi32(tmp0, rounding);
-    tmp2 = _mm_add_epi32(tmp2, rounding);
-    tmp4 = _mm_add_epi32(tmp4, rounding);
-    tmp6 = _mm_add_epi32(tmp6, rounding);
-
-    tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS);
-    tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS);
-    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS);
-    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS);
-    tmp4 = _mm_srai_epi32(tmp4, DCT_CONST_BITS);
-    tmp6 = _mm_srai_epi32(tmp6, DCT_CONST_BITS);
-
-    stp1_6 = _mm_packs_epi32(tmp3, tmp1);
-
-    stp2_10 = _mm_packs_epi32(tmp0, zero);
-    stp2_13 = _mm_packs_epi32(tmp2, zero);
-    stp2_11 = _mm_packs_epi32(tmp4, zero);
-    stp2_12 = _mm_packs_epi32(tmp6, zero);
-
-    tmp0 = _mm_add_epi16(stp1_0, stp1_4);
-    tmp1 = _mm_sub_epi16(stp1_0, stp1_4);
-    tmp2 = _mm_add_epi16(stp1_1, stp1_6);
-    tmp3 = _mm_sub_epi16(stp1_1, stp1_6);
-
-    stp2_0 = _mm_unpackhi_epi64(tmp0, zero);
-    stp2_1 = _mm_unpacklo_epi64(tmp2, zero);
-    stp2_2 = _mm_unpackhi_epi64(tmp2, zero);
-    stp2_3 = _mm_unpacklo_epi64(tmp0, zero);
-    stp2_4 = _mm_unpacklo_epi64(tmp1, zero);
-    stp2_5 = _mm_unpackhi_epi64(tmp3, zero);
-    stp2_6 = _mm_unpacklo_epi64(tmp3, zero);
-    stp2_7 = _mm_unpackhi_epi64(tmp1, zero);
-  }
-
-  // Stage7. Left 8x16 only.
-  l[0] = _mm_add_epi16(stp2_0, stp1_15);
-  l[1] = _mm_add_epi16(stp2_1, stp1_14);
-  l[2] = _mm_add_epi16(stp2_2, stp2_13);
-  l[3] = _mm_add_epi16(stp2_3, stp2_12);
-  l[4] = _mm_add_epi16(stp2_4, stp2_11);
-  l[5] = _mm_add_epi16(stp2_5, stp2_10);
-  l[6] = _mm_add_epi16(stp2_6, stp1_9);
-  l[7] = _mm_add_epi16(stp2_7, stp1_8);
-  l[8] = _mm_sub_epi16(stp2_7, stp1_8);
-  l[9] = _mm_sub_epi16(stp2_6, stp1_9);
-  l[10] = _mm_sub_epi16(stp2_5, stp2_10);
-  l[11] = _mm_sub_epi16(stp2_4, stp2_11);
-  l[12] = _mm_sub_epi16(stp2_3, stp2_12);
-  l[13] = _mm_sub_epi16(stp2_2, stp2_13);
-  l[14] = _mm_sub_epi16(stp2_1, stp1_14);
-  l[15] = _mm_sub_epi16(stp2_0, stp1_15);
-
-  // Second 1-D inverse transform, performed per 8x16 block
-  for (i = 0; i < 2; i++) {
-    int j;
-    array_transpose_4X8(l + 8 * i, in);
-
-    IDCT16_10
-
-    // Stage7
-    in[0] = _mm_add_epi16(stp2_0, stp1_15);
-    in[1] = _mm_add_epi16(stp2_1, stp1_14);
-    in[2] = _mm_add_epi16(stp2_2, stp2_13);
-    in[3] = _mm_add_epi16(stp2_3, stp2_12);
-    in[4] = _mm_add_epi16(stp2_4, stp2_11);
-    in[5] = _mm_add_epi16(stp2_5, stp2_10);
-    in[6] = _mm_add_epi16(stp2_6, stp1_9);
-    in[7] = _mm_add_epi16(stp2_7, stp1_8);
-    in[8] = _mm_sub_epi16(stp2_7, stp1_8);
-    in[9] = _mm_sub_epi16(stp2_6, stp1_9);
-    in[10] = _mm_sub_epi16(stp2_5, stp2_10);
-    in[11] = _mm_sub_epi16(stp2_4, stp2_11);
-    in[12] = _mm_sub_epi16(stp2_3, stp2_12);
-    in[13] = _mm_sub_epi16(stp2_2, stp2_13);
-    in[14] = _mm_sub_epi16(stp2_1, stp1_14);
-    in[15] = _mm_sub_epi16(stp2_0, stp1_15);
-
-    for (j = 0; j < 16; ++j) {
-      // Final rounding and shift
-      in[j] = _mm_adds_epi16(in[j], final_rounding);
-      in[j] = _mm_srai_epi16(in[j], 6);
-      RECON_AND_STORE(dest + j * stride, in[j]);
-    }
-
-    dest += 8;
-  }
-}
-
-#define LOAD_DQCOEFF(reg, input) \
-  {  \
-    reg = _mm_load_si128((const __m128i *) input); \
-    input += 8; \
-  }  \
-
-#define IDCT32_34 \
-/* Stage1 */ \
-{ \
-  const __m128i zero = _mm_setzero_si128();\
-  const __m128i lo_1_31 = _mm_unpacklo_epi16(in[1], zero); \
-  const __m128i hi_1_31 = _mm_unpackhi_epi16(in[1], zero); \
-  \
-  const __m128i lo_25_7= _mm_unpacklo_epi16(zero, in[7]); \
-  const __m128i hi_25_7 = _mm_unpackhi_epi16(zero, in[7]); \
-  \
-  const __m128i lo_5_27 = _mm_unpacklo_epi16(in[5], zero); \
-  const __m128i hi_5_27 = _mm_unpackhi_epi16(in[5], zero); \
-  \
-  const __m128i lo_29_3 = _mm_unpacklo_epi16(zero, in[3]); \
-  const __m128i hi_29_3 = _mm_unpackhi_epi16(zero, in[3]); \
-  \
-  MULTIPLICATION_AND_ADD_2(lo_1_31, hi_1_31, stg1_0, \
-                         stg1_1, stp1_16, stp1_31); \
-  MULTIPLICATION_AND_ADD_2(lo_25_7, hi_25_7, stg1_6, \
-                         stg1_7, stp1_19, stp1_28); \
-  MULTIPLICATION_AND_ADD_2(lo_5_27, hi_5_27, stg1_8, \
-                         stg1_9, stp1_20, stp1_27); \
-  MULTIPLICATION_AND_ADD_2(lo_29_3, hi_29_3, stg1_14, \
-                         stg1_15, stp1_23, stp1_24); \
-} \
-\
-/* Stage2 */ \
-{ \
-  const __m128i zero = _mm_setzero_si128();\
-  const __m128i lo_2_30 = _mm_unpacklo_epi16(in[2], zero); \
-  const __m128i hi_2_30 = _mm_unpackhi_epi16(in[2], zero); \
-  \
-  const __m128i lo_26_6 = _mm_unpacklo_epi16(zero, in[6]); \
-  const __m128i hi_26_6 = _mm_unpackhi_epi16(zero, in[6]); \
-  \
-  MULTIPLICATION_AND_ADD_2(lo_2_30, hi_2_30, stg2_0, \
-                         stg2_1, stp2_8, stp2_15); \
-  MULTIPLICATION_AND_ADD_2(lo_26_6, hi_26_6, stg2_6, \
-                         stg2_7, stp2_11, stp2_12); \
-  \
-  stp2_16 = stp1_16; \
-  stp2_19 = stp1_19; \
-  \
-  stp2_20 = stp1_20; \
-  stp2_23 = stp1_23; \
-  \
-  stp2_24 = stp1_24; \
-  stp2_27 = stp1_27; \
-  \
-  stp2_28 = stp1_28; \
-  stp2_31 = stp1_31; \
-} \
-\
-/* Stage3 */ \
-{ \
-  const __m128i zero = _mm_setzero_si128();\
-  const __m128i lo_4_28 = _mm_unpacklo_epi16(in[4], zero); \
-  const __m128i hi_4_28 = _mm_unpackhi_epi16(in[4], zero); \
-  \
-  const __m128i lo_17_30 = _mm_unpacklo_epi16(stp1_16, stp1_31); \
-  const __m128i hi_17_30 = _mm_unpackhi_epi16(stp1_16, stp1_31); \
-  const __m128i lo_18_29 = _mm_unpacklo_epi16(stp1_19, stp1_28); \
-  const __m128i hi_18_29 = _mm_unpackhi_epi16(stp1_19, stp1_28); \
-  \
-  const __m128i lo_21_26 = _mm_unpacklo_epi16(stp1_20, stp1_27); \
-  const __m128i hi_21_26 = _mm_unpackhi_epi16(stp1_20, stp1_27); \
-  const __m128i lo_22_25 = _mm_unpacklo_epi16(stp1_23, stp1_24); \
-  const __m128i hi_22_25 = _mm_unpackhi_epi16(stp1_23, stp2_24); \
-  \
-  MULTIPLICATION_AND_ADD_2(lo_4_28, hi_4_28, stg3_0, \
-                         stg3_1, stp1_4, stp1_7); \
-  \
-  stp1_8 = stp2_8; \
-  stp1_11 = stp2_11; \
-  stp1_12 = stp2_12; \
-  stp1_15 = stp2_15; \
-  \
-  MULTIPLICATION_AND_ADD(lo_17_30, hi_17_30, lo_18_29, hi_18_29, stg3_4, \
-                         stg3_5, stg3_6, stg3_4, stp1_17, stp1_30, \
-                         stp1_18, stp1_29) \
-  MULTIPLICATION_AND_ADD(lo_21_26, hi_21_26, lo_22_25, hi_22_25, stg3_8, \
-                         stg3_9, stg3_10, stg3_8, stp1_21, stp1_26, \
-                         stp1_22, stp1_25) \
-  \
-  stp1_16 = stp2_16; \
-  stp1_31 = stp2_31; \
-  stp1_19 = stp2_19; \
-  stp1_20 = stp2_20; \
-  stp1_23 = stp2_23; \
-  stp1_24 = stp2_24; \
-  stp1_27 = stp2_27; \
-  stp1_28 = stp2_28; \
-} \
-\
-/* Stage4 */ \
-{ \
-  const __m128i zero = _mm_setzero_si128();\
-  const __m128i lo_0_16 = _mm_unpacklo_epi16(in[0], zero); \
-  const __m128i hi_0_16 = _mm_unpackhi_epi16(in[0], zero); \
-  \
-  const __m128i lo_9_14 = _mm_unpacklo_epi16(stp2_8, stp2_15); \
-  const __m128i hi_9_14 = _mm_unpackhi_epi16(stp2_8, stp2_15); \
-  const __m128i lo_10_13 = _mm_unpacklo_epi16(stp2_11, stp2_12); \
-  const __m128i hi_10_13 = _mm_unpackhi_epi16(stp2_11, stp2_12); \
-  \
-  MULTIPLICATION_AND_ADD_2(lo_0_16, hi_0_16, stg4_0, \
-                         stg4_1, stp2_0, stp2_1); \
-  \
-  stp2_4 = stp1_4; \
-  stp2_5 = stp1_4; \
-  stp2_6 = stp1_7; \
-  stp2_7 = stp1_7; \
-  \
-  MULTIPLICATION_AND_ADD(lo_9_14, hi_9_14, lo_10_13, hi_10_13, stg4_4, \
-                         stg4_5, stg4_6, stg4_4, stp2_9, stp2_14, \
-                         stp2_10, stp2_13) \
-  \
-  stp2_8 = stp1_8; \
-  stp2_15 = stp1_15; \
-  stp2_11 = stp1_11; \
-  stp2_12 = stp1_12; \
-  \
-  stp2_16 = _mm_add_epi16(stp1_16, stp1_19); \
-  stp2_17 = _mm_add_epi16(stp1_17, stp1_18); \
-  stp2_18 = _mm_sub_epi16(stp1_17, stp1_18); \
-  stp2_19 = _mm_sub_epi16(stp1_16, stp1_19); \
-  stp2_20 = _mm_sub_epi16(stp1_23, stp1_20); \
-  stp2_21 = _mm_sub_epi16(stp1_22, stp1_21); \
-  stp2_22 = _mm_add_epi16(stp1_22, stp1_21); \
-  stp2_23 = _mm_add_epi16(stp1_23, stp1_20); \
-  \
-  stp2_24 = _mm_add_epi16(stp1_24, stp1_27); \
-  stp2_25 = _mm_add_epi16(stp1_25, stp1_26); \
-  stp2_26 = _mm_sub_epi16(stp1_25, stp1_26); \
-  stp2_27 = _mm_sub_epi16(stp1_24, stp1_27); \
-  stp2_28 = _mm_sub_epi16(stp1_31, stp1_28); \
-  stp2_29 = _mm_sub_epi16(stp1_30, stp1_29); \
-  stp2_30 = _mm_add_epi16(stp1_29, stp1_30); \
-  stp2_31 = _mm_add_epi16(stp1_28, stp1_31); \
-} \
-\
-/* Stage5 */ \
-{ \
-  const __m128i lo_6_5 = _mm_unpacklo_epi16(stp2_6, stp2_5); \
-  const __m128i hi_6_5 = _mm_unpackhi_epi16(stp2_6, stp2_5); \
-  const __m128i lo_18_29 = _mm_unpacklo_epi16(stp2_18, stp2_29); \
-  const __m128i hi_18_29 = _mm_unpackhi_epi16(stp2_18, stp2_29); \
-  \
-  const __m128i lo_19_28 = _mm_unpacklo_epi16(stp2_19, stp2_28); \
-  const __m128i hi_19_28 = _mm_unpackhi_epi16(stp2_19, stp2_28); \
-  const __m128i lo_20_27 = _mm_unpacklo_epi16(stp2_20, stp2_27); \
-  const __m128i hi_20_27 = _mm_unpackhi_epi16(stp2_20, stp2_27); \
-  \
-  const __m128i lo_21_26 = _mm_unpacklo_epi16(stp2_21, stp2_26); \
-  const __m128i hi_21_26 = _mm_unpackhi_epi16(stp2_21, stp2_26); \
-  \
-  stp1_0 = stp2_0; \
-  stp1_1 = stp2_1; \
-  stp1_2 = stp2_1; \
-  stp1_3 = stp2_0; \
-  \
-  tmp0 = _mm_madd_epi16(lo_6_5, stg4_1); \
-  tmp1 = _mm_madd_epi16(hi_6_5, stg4_1); \
-  tmp2 = _mm_madd_epi16(lo_6_5, stg4_0); \
-  tmp3 = _mm_madd_epi16(hi_6_5, stg4_0); \
-  \
-  tmp0 = _mm_add_epi32(tmp0, rounding); \
-  tmp1 = _mm_add_epi32(tmp1, rounding); \
-  tmp2 = _mm_add_epi32(tmp2, rounding); \
-  tmp3 = _mm_add_epi32(tmp3, rounding); \
-  \
-  tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS); \
-  tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS); \
-  tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS); \
-  tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS); \
-  \
-  stp1_5 = _mm_packs_epi32(tmp0, tmp1); \
-  stp1_6 = _mm_packs_epi32(tmp2, tmp3); \
-  \
-  stp1_4 = stp2_4; \
-  stp1_7 = stp2_7; \
-  \
-  stp1_8 = _mm_add_epi16(stp2_8, stp2_11); \
-  stp1_9 = _mm_add_epi16(stp2_9, stp2_10); \
-  stp1_10 = _mm_sub_epi16(stp2_9, stp2_10); \
-  stp1_11 = _mm_sub_epi16(stp2_8, stp2_11); \
-  stp1_12 = _mm_sub_epi16(stp2_15, stp2_12); \
-  stp1_13 = _mm_sub_epi16(stp2_14, stp2_13); \
-  stp1_14 = _mm_add_epi16(stp2_14, stp2_13); \
-  stp1_15 = _mm_add_epi16(stp2_15, stp2_12); \
-  \
-  stp1_16 = stp2_16; \
-  stp1_17 = stp2_17; \
-  \
-  MULTIPLICATION_AND_ADD(lo_18_29, hi_18_29, lo_19_28, hi_19_28, stg4_4, \
-                         stg4_5, stg4_4, stg4_5, stp1_18, stp1_29, \
-                         stp1_19, stp1_28) \
-  MULTIPLICATION_AND_ADD(lo_20_27, hi_20_27, lo_21_26, hi_21_26, stg4_6, \
-                         stg4_4, stg4_6, stg4_4, stp1_20, stp1_27, \
-                         stp1_21, stp1_26) \
-  \
-  stp1_22 = stp2_22; \
-  stp1_23 = stp2_23; \
-  stp1_24 = stp2_24; \
-  stp1_25 = stp2_25; \
-  stp1_30 = stp2_30; \
-  stp1_31 = stp2_31; \
-} \
-\
-/* Stage6 */ \
-{ \
-  const __m128i lo_10_13 = _mm_unpacklo_epi16(stp1_10, stp1_13); \
-  const __m128i hi_10_13 = _mm_unpackhi_epi16(stp1_10, stp1_13); \
-  const __m128i lo_11_12 = _mm_unpacklo_epi16(stp1_11, stp1_12); \
-  const __m128i hi_11_12 = _mm_unpackhi_epi16(stp1_11, stp1_12); \
-  \
-  stp2_0 = _mm_add_epi16(stp1_0, stp1_7); \
-  stp2_1 = _mm_add_epi16(stp1_1, stp1_6); \
-  stp2_2 = _mm_add_epi16(stp1_2, stp1_5); \
-  stp2_3 = _mm_add_epi16(stp1_3, stp1_4); \
-  stp2_4 = _mm_sub_epi16(stp1_3, stp1_4); \
-  stp2_5 = _mm_sub_epi16(stp1_2, stp1_5); \
-  stp2_6 = _mm_sub_epi16(stp1_1, stp1_6); \
-  stp2_7 = _mm_sub_epi16(stp1_0, stp1_7); \
-  \
-  stp2_8 = stp1_8; \
-  stp2_9 = stp1_9; \
-  stp2_14 = stp1_14; \
-  stp2_15 = stp1_15; \
-  \
-  MULTIPLICATION_AND_ADD(lo_10_13, hi_10_13, lo_11_12, hi_11_12, \
-                         stg6_0, stg4_0, stg6_0, stg4_0, stp2_10, \
-                         stp2_13, stp2_11, stp2_12) \
-  \
-  stp2_16 = _mm_add_epi16(stp1_16, stp1_23); \
-  stp2_17 = _mm_add_epi16(stp1_17, stp1_22); \
-  stp2_18 = _mm_add_epi16(stp1_18, stp1_21); \
-  stp2_19 = _mm_add_epi16(stp1_19, stp1_20); \
-  stp2_20 = _mm_sub_epi16(stp1_19, stp1_20); \
-  stp2_21 = _mm_sub_epi16(stp1_18, stp1_21); \
-  stp2_22 = _mm_sub_epi16(stp1_17, stp1_22); \
-  stp2_23 = _mm_sub_epi16(stp1_16, stp1_23); \
-  \
-  stp2_24 = _mm_sub_epi16(stp1_31, stp1_24); \
-  stp2_25 = _mm_sub_epi16(stp1_30, stp1_25); \
-  stp2_26 = _mm_sub_epi16(stp1_29, stp1_26); \
-  stp2_27 = _mm_sub_epi16(stp1_28, stp1_27); \
-  stp2_28 = _mm_add_epi16(stp1_27, stp1_28); \
-  stp2_29 = _mm_add_epi16(stp1_26, stp1_29); \
-  stp2_30 = _mm_add_epi16(stp1_25, stp1_30); \
-  stp2_31 = _mm_add_epi16(stp1_24, stp1_31); \
-} \
-\
-/* Stage7 */ \
-{ \
-  const __m128i lo_20_27 = _mm_unpacklo_epi16(stp2_20, stp2_27); \
-  const __m128i hi_20_27 = _mm_unpackhi_epi16(stp2_20, stp2_27); \
-  const __m128i lo_21_26 = _mm_unpacklo_epi16(stp2_21, stp2_26); \
-  const __m128i hi_21_26 = _mm_unpackhi_epi16(stp2_21, stp2_26); \
-  \
-  const __m128i lo_22_25 = _mm_unpacklo_epi16(stp2_22, stp2_25); \
-  const __m128i hi_22_25 = _mm_unpackhi_epi16(stp2_22, stp2_25); \
-  const __m128i lo_23_24 = _mm_unpacklo_epi16(stp2_23, stp2_24); \
-  const __m128i hi_23_24 = _mm_unpackhi_epi16(stp2_23, stp2_24); \
-  \
-  stp1_0 = _mm_add_epi16(stp2_0, stp2_15); \
-  stp1_1 = _mm_add_epi16(stp2_1, stp2_14); \
-  stp1_2 = _mm_add_epi16(stp2_2, stp2_13); \
-  stp1_3 = _mm_add_epi16(stp2_3, stp2_12); \
-  stp1_4 = _mm_add_epi16(stp2_4, stp2_11); \
-  stp1_5 = _mm_add_epi16(stp2_5, stp2_10); \
-  stp1_6 = _mm_add_epi16(stp2_6, stp2_9); \
-  stp1_7 = _mm_add_epi16(stp2_7, stp2_8); \
-  stp1_8 = _mm_sub_epi16(stp2_7, stp2_8); \
-  stp1_9 = _mm_sub_epi16(stp2_6, stp2_9); \
-  stp1_10 = _mm_sub_epi16(stp2_5, stp2_10); \
-  stp1_11 = _mm_sub_epi16(stp2_4, stp2_11); \
-  stp1_12 = _mm_sub_epi16(stp2_3, stp2_12); \
-  stp1_13 = _mm_sub_epi16(stp2_2, stp2_13); \
-  stp1_14 = _mm_sub_epi16(stp2_1, stp2_14); \
-  stp1_15 = _mm_sub_epi16(stp2_0, stp2_15); \
-  \
-  stp1_16 = stp2_16; \
-  stp1_17 = stp2_17; \
-  stp1_18 = stp2_18; \
-  stp1_19 = stp2_19; \
-  \
-  MULTIPLICATION_AND_ADD(lo_20_27, hi_20_27, lo_21_26, hi_21_26, stg6_0, \
-                         stg4_0, stg6_0, stg4_0, stp1_20, stp1_27, \
-                         stp1_21, stp1_26) \
-  MULTIPLICATION_AND_ADD(lo_22_25, hi_22_25, lo_23_24, hi_23_24, stg6_0, \
-                         stg4_0, stg6_0, stg4_0, stp1_22, stp1_25, \
-                         stp1_23, stp1_24) \
-  \
-  stp1_28 = stp2_28; \
-  stp1_29 = stp2_29; \
-  stp1_30 = stp2_30; \
-  stp1_31 = stp2_31; \
-}
-
-
-#define IDCT32 \
-/* Stage1 */ \
-{ \
-  const __m128i lo_1_31 = _mm_unpacklo_epi16(in[1], in[31]); \
-  const __m128i hi_1_31 = _mm_unpackhi_epi16(in[1], in[31]); \
-  const __m128i lo_17_15 = _mm_unpacklo_epi16(in[17], in[15]); \
-  const __m128i hi_17_15 = _mm_unpackhi_epi16(in[17], in[15]); \
-  \
-  const __m128i lo_9_23 = _mm_unpacklo_epi16(in[9], in[23]); \
-  const __m128i hi_9_23 = _mm_unpackhi_epi16(in[9], in[23]); \
-  const __m128i lo_25_7= _mm_unpacklo_epi16(in[25], in[7]); \
-  const __m128i hi_25_7 = _mm_unpackhi_epi16(in[25], in[7]); \
-  \
-  const __m128i lo_5_27 = _mm_unpacklo_epi16(in[5], in[27]); \
-  const __m128i hi_5_27 = _mm_unpackhi_epi16(in[5], in[27]); \
-  const __m128i lo_21_11 = _mm_unpacklo_epi16(in[21], in[11]); \
-  const __m128i hi_21_11 = _mm_unpackhi_epi16(in[21], in[11]); \
-  \
-  const __m128i lo_13_19 = _mm_unpacklo_epi16(in[13], in[19]); \
-  const __m128i hi_13_19 = _mm_unpackhi_epi16(in[13], in[19]); \
-  const __m128i lo_29_3 = _mm_unpacklo_epi16(in[29], in[3]); \
-  const __m128i hi_29_3 = _mm_unpackhi_epi16(in[29], in[3]); \
-  \
-  MULTIPLICATION_AND_ADD(lo_1_31, hi_1_31, lo_17_15, hi_17_15, stg1_0, \
-                         stg1_1, stg1_2, stg1_3, stp1_16, stp1_31, \
-                         stp1_17, stp1_30) \
-  MULTIPLICATION_AND_ADD(lo_9_23, hi_9_23, lo_25_7, hi_25_7, stg1_4, \
-                         stg1_5, stg1_6, stg1_7, stp1_18, stp1_29, \
-                         stp1_19, stp1_28) \
-  MULTIPLICATION_AND_ADD(lo_5_27, hi_5_27, lo_21_11, hi_21_11, stg1_8, \
-                         stg1_9, stg1_10, stg1_11, stp1_20, stp1_27, \
-                         stp1_21, stp1_26) \
-  MULTIPLICATION_AND_ADD(lo_13_19, hi_13_19, lo_29_3, hi_29_3, stg1_12, \
-                         stg1_13, stg1_14, stg1_15, stp1_22, stp1_25, \
-                         stp1_23, stp1_24) \
-} \
-\
-/* Stage2 */ \
-{ \
-  const __m128i lo_2_30 = _mm_unpacklo_epi16(in[2], in[30]); \
-  const __m128i hi_2_30 = _mm_unpackhi_epi16(in[2], in[30]); \
-  const __m128i lo_18_14 = _mm_unpacklo_epi16(in[18], in[14]); \
-  const __m128i hi_18_14 = _mm_unpackhi_epi16(in[18], in[14]); \
-  \
-  const __m128i lo_10_22 = _mm_unpacklo_epi16(in[10], in[22]); \
-  const __m128i hi_10_22 = _mm_unpackhi_epi16(in[10], in[22]); \
-  const __m128i lo_26_6 = _mm_unpacklo_epi16(in[26], in[6]); \
-  const __m128i hi_26_6 = _mm_unpackhi_epi16(in[26], in[6]); \
-  \
-  MULTIPLICATION_AND_ADD(lo_2_30, hi_2_30, lo_18_14, hi_18_14, stg2_0, \
-                         stg2_1, stg2_2, stg2_3, stp2_8, stp2_15, stp2_9, \
-                         stp2_14) \
-  MULTIPLICATION_AND_ADD(lo_10_22, hi_10_22, lo_26_6, hi_26_6, stg2_4, \
-                         stg2_5, stg2_6, stg2_7, stp2_10, stp2_13, \
-                         stp2_11, stp2_12) \
-  \
-  stp2_16 = _mm_add_epi16(stp1_16, stp1_17); \
-  stp2_17 = _mm_sub_epi16(stp1_16, stp1_17); \
-  stp2_18 = _mm_sub_epi16(stp1_19, stp1_18); \
-  stp2_19 = _mm_add_epi16(stp1_19, stp1_18); \
-  \
-  stp2_20 = _mm_add_epi16(stp1_20, stp1_21); \
-  stp2_21 = _mm_sub_epi16(stp1_20, stp1_21); \
-  stp2_22 = _mm_sub_epi16(stp1_23, stp1_22); \
-  stp2_23 = _mm_add_epi16(stp1_23, stp1_22); \
-  \
-  stp2_24 = _mm_add_epi16(stp1_24, stp1_25); \
-  stp2_25 = _mm_sub_epi16(stp1_24, stp1_25); \
-  stp2_26 = _mm_sub_epi16(stp1_27, stp1_26); \
-  stp2_27 = _mm_add_epi16(stp1_27, stp1_26); \
-  \
-  stp2_28 = _mm_add_epi16(stp1_28, stp1_29); \
-  stp2_29 = _mm_sub_epi16(stp1_28, stp1_29); \
-  stp2_30 = _mm_sub_epi16(stp1_31, stp1_30); \
-  stp2_31 = _mm_add_epi16(stp1_31, stp1_30); \
-} \
-\
-/* Stage3 */ \
-{ \
-  const __m128i lo_4_28 = _mm_unpacklo_epi16(in[4], in[28]); \
-  const __m128i hi_4_28 = _mm_unpackhi_epi16(in[4], in[28]); \
-  const __m128i lo_20_12 = _mm_unpacklo_epi16(in[20], in[12]); \
-  const __m128i hi_20_12 = _mm_unpackhi_epi16(in[20], in[12]); \
-  \
-  const __m128i lo_17_30 = _mm_unpacklo_epi16(stp2_17, stp2_30); \
-  const __m128i hi_17_30 = _mm_unpackhi_epi16(stp2_17, stp2_30); \
-  const __m128i lo_18_29 = _mm_unpacklo_epi16(stp2_18, stp2_29); \
-  const __m128i hi_18_29 = _mm_unpackhi_epi16(stp2_18, stp2_29); \
-  \
-  const __m128i lo_21_26 = _mm_unpacklo_epi16(stp2_21, stp2_26); \
-  const __m128i hi_21_26 = _mm_unpackhi_epi16(stp2_21, stp2_26); \
-  const __m128i lo_22_25 = _mm_unpacklo_epi16(stp2_22, stp2_25); \
-  const __m128i hi_22_25 = _mm_unpackhi_epi16(stp2_22, stp2_25); \
-  \
-  MULTIPLICATION_AND_ADD(lo_4_28, hi_4_28, lo_20_12, hi_20_12, stg3_0, \
-                         stg3_1, stg3_2, stg3_3, stp1_4, stp1_7, stp1_5, \
-                         stp1_6) \
-  \
-  stp1_8 = _mm_add_epi16(stp2_8, stp2_9); \
-  stp1_9 = _mm_sub_epi16(stp2_8, stp2_9); \
-  stp1_10 = _mm_sub_epi16(stp2_11, stp2_10); \
-  stp1_11 = _mm_add_epi16(stp2_11, stp2_10); \
-  stp1_12 = _mm_add_epi16(stp2_12, stp2_13); \
-  stp1_13 = _mm_sub_epi16(stp2_12, stp2_13); \
-  stp1_14 = _mm_sub_epi16(stp2_15, stp2_14); \
-  stp1_15 = _mm_add_epi16(stp2_15, stp2_14); \
-  \
-  MULTIPLICATION_AND_ADD(lo_17_30, hi_17_30, lo_18_29, hi_18_29, stg3_4, \
-                         stg3_5, stg3_6, stg3_4, stp1_17, stp1_30, \
-                         stp1_18, stp1_29) \
-  MULTIPLICATION_AND_ADD(lo_21_26, hi_21_26, lo_22_25, hi_22_25, stg3_8, \
-                         stg3_9, stg3_10, stg3_8, stp1_21, stp1_26, \
-                         stp1_22, stp1_25) \
-  \
-  stp1_16 = stp2_16; \
-  stp1_31 = stp2_31; \
-  stp1_19 = stp2_19; \
-  stp1_20 = stp2_20; \
-  stp1_23 = stp2_23; \
-  stp1_24 = stp2_24; \
-  stp1_27 = stp2_27; \
-  stp1_28 = stp2_28; \
-} \
-\
-/* Stage4 */ \
-{ \
-  const __m128i lo_0_16 = _mm_unpacklo_epi16(in[0], in[16]); \
-  const __m128i hi_0_16 = _mm_unpackhi_epi16(in[0], in[16]); \
-  const __m128i lo_8_24 = _mm_unpacklo_epi16(in[8], in[24]); \
-  const __m128i hi_8_24 = _mm_unpackhi_epi16(in[8], in[24]); \
-  \
-  const __m128i lo_9_14 = _mm_unpacklo_epi16(stp1_9, stp1_14); \
-  const __m128i hi_9_14 = _mm_unpackhi_epi16(stp1_9, stp1_14); \
-  const __m128i lo_10_13 = _mm_unpacklo_epi16(stp1_10, stp1_13); \
-  const __m128i hi_10_13 = _mm_unpackhi_epi16(stp1_10, stp1_13); \
-  \
-  MULTIPLICATION_AND_ADD(lo_0_16, hi_0_16, lo_8_24, hi_8_24, stg4_0, \
-                         stg4_1, stg4_2, stg4_3, stp2_0, stp2_1, \
-                         stp2_2, stp2_3) \
-  \
-  stp2_4 = _mm_add_epi16(stp1_4, stp1_5); \
-  stp2_5 = _mm_sub_epi16(stp1_4, stp1_5); \
-  stp2_6 = _mm_sub_epi16(stp1_7, stp1_6); \
-  stp2_7 = _mm_add_epi16(stp1_7, stp1_6); \
-  \
-  MULTIPLICATION_AND_ADD(lo_9_14, hi_9_14, lo_10_13, hi_10_13, stg4_4, \
-                         stg4_5, stg4_6, stg4_4, stp2_9, stp2_14, \
-                         stp2_10, stp2_13) \
-  \
-  stp2_8 = stp1_8; \
-  stp2_15 = stp1_15; \
-  stp2_11 = stp1_11; \
-  stp2_12 = stp1_12; \
-  \
-  stp2_16 = _mm_add_epi16(stp1_16, stp1_19); \
-  stp2_17 = _mm_add_epi16(stp1_17, stp1_18); \
-  stp2_18 = _mm_sub_epi16(stp1_17, stp1_18); \
-  stp2_19 = _mm_sub_epi16(stp1_16, stp1_19); \
-  stp2_20 = _mm_sub_epi16(stp1_23, stp1_20); \
-  stp2_21 = _mm_sub_epi16(stp1_22, stp1_21); \
-  stp2_22 = _mm_add_epi16(stp1_22, stp1_21); \
-  stp2_23 = _mm_add_epi16(stp1_23, stp1_20); \
-  \
-  stp2_24 = _mm_add_epi16(stp1_24, stp1_27); \
-  stp2_25 = _mm_add_epi16(stp1_25, stp1_26); \
-  stp2_26 = _mm_sub_epi16(stp1_25, stp1_26); \
-  stp2_27 = _mm_sub_epi16(stp1_24, stp1_27); \
-  stp2_28 = _mm_sub_epi16(stp1_31, stp1_28); \
-  stp2_29 = _mm_sub_epi16(stp1_30, stp1_29); \
-  stp2_30 = _mm_add_epi16(stp1_29, stp1_30); \
-  stp2_31 = _mm_add_epi16(stp1_28, stp1_31); \
-} \
-\
-/* Stage5 */ \
-{ \
-  const __m128i lo_6_5 = _mm_unpacklo_epi16(stp2_6, stp2_5); \
-  const __m128i hi_6_5 = _mm_unpackhi_epi16(stp2_6, stp2_5); \
-  const __m128i lo_18_29 = _mm_unpacklo_epi16(stp2_18, stp2_29); \
-  const __m128i hi_18_29 = _mm_unpackhi_epi16(stp2_18, stp2_29); \
-  \
-  const __m128i lo_19_28 = _mm_unpacklo_epi16(stp2_19, stp2_28); \
-  const __m128i hi_19_28 = _mm_unpackhi_epi16(stp2_19, stp2_28); \
-  const __m128i lo_20_27 = _mm_unpacklo_epi16(stp2_20, stp2_27); \
-  const __m128i hi_20_27 = _mm_unpackhi_epi16(stp2_20, stp2_27); \
-  \
-  const __m128i lo_21_26 = _mm_unpacklo_epi16(stp2_21, stp2_26); \
-  const __m128i hi_21_26 = _mm_unpackhi_epi16(stp2_21, stp2_26); \
-  \
-  stp1_0 = _mm_add_epi16(stp2_0, stp2_3); \
-  stp1_1 = _mm_add_epi16(stp2_1, stp2_2); \
-  stp1_2 = _mm_sub_epi16(stp2_1, stp2_2); \
-  stp1_3 = _mm_sub_epi16(stp2_0, stp2_3); \
-  \
-  tmp0 = _mm_madd_epi16(lo_6_5, stg4_1); \
-  tmp1 = _mm_madd_epi16(hi_6_5, stg4_1); \
-  tmp2 = _mm_madd_epi16(lo_6_5, stg4_0); \
-  tmp3 = _mm_madd_epi16(hi_6_5, stg4_0); \
-  \
-  tmp0 = _mm_add_epi32(tmp0, rounding); \
-  tmp1 = _mm_add_epi32(tmp1, rounding); \
-  tmp2 = _mm_add_epi32(tmp2, rounding); \
-  tmp3 = _mm_add_epi32(tmp3, rounding); \
-  \
-  tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS); \
-  tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS); \
-  tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS); \
-  tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS); \
-  \
-  stp1_5 = _mm_packs_epi32(tmp0, tmp1); \
-  stp1_6 = _mm_packs_epi32(tmp2, tmp3); \
-  \
-  stp1_4 = stp2_4; \
-  stp1_7 = stp2_7; \
-  \
-  stp1_8 = _mm_add_epi16(stp2_8, stp2_11); \
-  stp1_9 = _mm_add_epi16(stp2_9, stp2_10); \
-  stp1_10 = _mm_sub_epi16(stp2_9, stp2_10); \
-  stp1_11 = _mm_sub_epi16(stp2_8, stp2_11); \
-  stp1_12 = _mm_sub_epi16(stp2_15, stp2_12); \
-  stp1_13 = _mm_sub_epi16(stp2_14, stp2_13); \
-  stp1_14 = _mm_add_epi16(stp2_14, stp2_13); \
-  stp1_15 = _mm_add_epi16(stp2_15, stp2_12); \
-  \
-  stp1_16 = stp2_16; \
-  stp1_17 = stp2_17; \
-  \
-  MULTIPLICATION_AND_ADD(lo_18_29, hi_18_29, lo_19_28, hi_19_28, stg4_4, \
-                         stg4_5, stg4_4, stg4_5, stp1_18, stp1_29, \
-                         stp1_19, stp1_28) \
-  MULTIPLICATION_AND_ADD(lo_20_27, hi_20_27, lo_21_26, hi_21_26, stg4_6, \
-                         stg4_4, stg4_6, stg4_4, stp1_20, stp1_27, \
-                         stp1_21, stp1_26) \
-  \
-  stp1_22 = stp2_22; \
-  stp1_23 = stp2_23; \
-  stp1_24 = stp2_24; \
-  stp1_25 = stp2_25; \
-  stp1_30 = stp2_30; \
-  stp1_31 = stp2_31; \
-} \
-\
-/* Stage6 */ \
-{ \
-  const __m128i lo_10_13 = _mm_unpacklo_epi16(stp1_10, stp1_13); \
-  const __m128i hi_10_13 = _mm_unpackhi_epi16(stp1_10, stp1_13); \
-  const __m128i lo_11_12 = _mm_unpacklo_epi16(stp1_11, stp1_12); \
-  const __m128i hi_11_12 = _mm_unpackhi_epi16(stp1_11, stp1_12); \
-  \
-  stp2_0 = _mm_add_epi16(stp1_0, stp1_7); \
-  stp2_1 = _mm_add_epi16(stp1_1, stp1_6); \
-  stp2_2 = _mm_add_epi16(stp1_2, stp1_5); \
-  stp2_3 = _mm_add_epi16(stp1_3, stp1_4); \
-  stp2_4 = _mm_sub_epi16(stp1_3, stp1_4); \
-  stp2_5 = _mm_sub_epi16(stp1_2, stp1_5); \
-  stp2_6 = _mm_sub_epi16(stp1_1, stp1_6); \
-  stp2_7 = _mm_sub_epi16(stp1_0, stp1_7); \
-  \
-  stp2_8 = stp1_8; \
-  stp2_9 = stp1_9; \
-  stp2_14 = stp1_14; \
-  stp2_15 = stp1_15; \
-  \
-  MULTIPLICATION_AND_ADD(lo_10_13, hi_10_13, lo_11_12, hi_11_12, \
-                         stg6_0, stg4_0, stg6_0, stg4_0, stp2_10, \
-                         stp2_13, stp2_11, stp2_12) \
-  \
-  stp2_16 = _mm_add_epi16(stp1_16, stp1_23); \
-  stp2_17 = _mm_add_epi16(stp1_17, stp1_22); \
-  stp2_18 = _mm_add_epi16(stp1_18, stp1_21); \
-  stp2_19 = _mm_add_epi16(stp1_19, stp1_20); \
-  stp2_20 = _mm_sub_epi16(stp1_19, stp1_20); \
-  stp2_21 = _mm_sub_epi16(stp1_18, stp1_21); \
-  stp2_22 = _mm_sub_epi16(stp1_17, stp1_22); \
-  stp2_23 = _mm_sub_epi16(stp1_16, stp1_23); \
-  \
-  stp2_24 = _mm_sub_epi16(stp1_31, stp1_24); \
-  stp2_25 = _mm_sub_epi16(stp1_30, stp1_25); \
-  stp2_26 = _mm_sub_epi16(stp1_29, stp1_26); \
-  stp2_27 = _mm_sub_epi16(stp1_28, stp1_27); \
-  stp2_28 = _mm_add_epi16(stp1_27, stp1_28); \
-  stp2_29 = _mm_add_epi16(stp1_26, stp1_29); \
-  stp2_30 = _mm_add_epi16(stp1_25, stp1_30); \
-  stp2_31 = _mm_add_epi16(stp1_24, stp1_31); \
-} \
-\
-/* Stage7 */ \
-{ \
-  const __m128i lo_20_27 = _mm_unpacklo_epi16(stp2_20, stp2_27); \
-  const __m128i hi_20_27 = _mm_unpackhi_epi16(stp2_20, stp2_27); \
-  const __m128i lo_21_26 = _mm_unpacklo_epi16(stp2_21, stp2_26); \
-  const __m128i hi_21_26 = _mm_unpackhi_epi16(stp2_21, stp2_26); \
-  \
-  const __m128i lo_22_25 = _mm_unpacklo_epi16(stp2_22, stp2_25); \
-  const __m128i hi_22_25 = _mm_unpackhi_epi16(stp2_22, stp2_25); \
-  const __m128i lo_23_24 = _mm_unpacklo_epi16(stp2_23, stp2_24); \
-  const __m128i hi_23_24 = _mm_unpackhi_epi16(stp2_23, stp2_24); \
-  \
-  stp1_0 = _mm_add_epi16(stp2_0, stp2_15); \
-  stp1_1 = _mm_add_epi16(stp2_1, stp2_14); \
-  stp1_2 = _mm_add_epi16(stp2_2, stp2_13); \
-  stp1_3 = _mm_add_epi16(stp2_3, stp2_12); \
-  stp1_4 = _mm_add_epi16(stp2_4, stp2_11); \
-  stp1_5 = _mm_add_epi16(stp2_5, stp2_10); \
-  stp1_6 = _mm_add_epi16(stp2_6, stp2_9); \
-  stp1_7 = _mm_add_epi16(stp2_7, stp2_8); \
-  stp1_8 = _mm_sub_epi16(stp2_7, stp2_8); \
-  stp1_9 = _mm_sub_epi16(stp2_6, stp2_9); \
-  stp1_10 = _mm_sub_epi16(stp2_5, stp2_10); \
-  stp1_11 = _mm_sub_epi16(stp2_4, stp2_11); \
-  stp1_12 = _mm_sub_epi16(stp2_3, stp2_12); \
-  stp1_13 = _mm_sub_epi16(stp2_2, stp2_13); \
-  stp1_14 = _mm_sub_epi16(stp2_1, stp2_14); \
-  stp1_15 = _mm_sub_epi16(stp2_0, stp2_15); \
-  \
-  stp1_16 = stp2_16; \
-  stp1_17 = stp2_17; \
-  stp1_18 = stp2_18; \
-  stp1_19 = stp2_19; \
-  \
-  MULTIPLICATION_AND_ADD(lo_20_27, hi_20_27, lo_21_26, hi_21_26, stg6_0, \
-                         stg4_0, stg6_0, stg4_0, stp1_20, stp1_27, \
-                         stp1_21, stp1_26) \
-  MULTIPLICATION_AND_ADD(lo_22_25, hi_22_25, lo_23_24, hi_23_24, stg6_0, \
-                         stg4_0, stg6_0, stg4_0, stp1_22, stp1_25, \
-                         stp1_23, stp1_24) \
-  \
-  stp1_28 = stp2_28; \
-  stp1_29 = stp2_29; \
-  stp1_30 = stp2_30; \
-  stp1_31 = stp2_31; \
-}
-
-// Only upper-left 8x8 has non-zero coeff
-void vp9_idct32x32_34_add_sse2(const int16_t *input, uint8_t *dest,
-                               int stride) {
-  const __m128i rounding = _mm_set1_epi32(DCT_CONST_ROUNDING);
-  const __m128i final_rounding = _mm_set1_epi16(1<<5);
-
-  // idct constants for each stage
-  const __m128i stg1_0 = pair_set_epi16(cospi_31_64, -cospi_1_64);
-  const __m128i stg1_1 = pair_set_epi16(cospi_1_64, cospi_31_64);
-  const __m128i stg1_6 = pair_set_epi16(cospi_7_64, -cospi_25_64);
-  const __m128i stg1_7 = pair_set_epi16(cospi_25_64, cospi_7_64);
-  const __m128i stg1_8 = pair_set_epi16(cospi_27_64, -cospi_5_64);
-  const __m128i stg1_9 = pair_set_epi16(cospi_5_64, cospi_27_64);
-  const __m128i stg1_14 = pair_set_epi16(cospi_3_64, -cospi_29_64);
-  const __m128i stg1_15 = pair_set_epi16(cospi_29_64, cospi_3_64);
-
-  const __m128i stg2_0 = pair_set_epi16(cospi_30_64, -cospi_2_64);
-  const __m128i stg2_1 = pair_set_epi16(cospi_2_64, cospi_30_64);
-  const __m128i stg2_6 = pair_set_epi16(cospi_6_64, -cospi_26_64);
-  const __m128i stg2_7 = pair_set_epi16(cospi_26_64, cospi_6_64);
-
-  const __m128i stg3_0 = pair_set_epi16(cospi_28_64, -cospi_4_64);
-  const __m128i stg3_1 = pair_set_epi16(cospi_4_64, cospi_28_64);
-  const __m128i stg3_4 = pair_set_epi16(-cospi_4_64, cospi_28_64);
-  const __m128i stg3_5 = pair_set_epi16(cospi_28_64, cospi_4_64);
-  const __m128i stg3_6 = pair_set_epi16(-cospi_28_64, -cospi_4_64);
-  const __m128i stg3_8 = pair_set_epi16(-cospi_20_64, cospi_12_64);
-  const __m128i stg3_9 = pair_set_epi16(cospi_12_64, cospi_20_64);
-  const __m128i stg3_10 = pair_set_epi16(-cospi_12_64, -cospi_20_64);
-
-  const __m128i stg4_0 = pair_set_epi16(cospi_16_64, cospi_16_64);
-  const __m128i stg4_1 = pair_set_epi16(cospi_16_64, -cospi_16_64);
-  const __m128i stg4_4 = pair_set_epi16(-cospi_8_64, cospi_24_64);
-  const __m128i stg4_5 = pair_set_epi16(cospi_24_64, cospi_8_64);
-  const __m128i stg4_6 = pair_set_epi16(-cospi_24_64, -cospi_8_64);
-
-  const __m128i stg6_0 = pair_set_epi16(-cospi_16_64, cospi_16_64);
-
-  __m128i in[32], col[32];
-  __m128i stp1_0, stp1_1, stp1_2, stp1_3, stp1_4, stp1_5, stp1_6, stp1_7,
-          stp1_8, stp1_9, stp1_10, stp1_11, stp1_12, stp1_13, stp1_14, stp1_15,
-          stp1_16, stp1_17, stp1_18, stp1_19, stp1_20, stp1_21, stp1_22,
-          stp1_23, stp1_24, stp1_25, stp1_26, stp1_27, stp1_28, stp1_29,
-          stp1_30, stp1_31;
-  __m128i stp2_0, stp2_1, stp2_2, stp2_3, stp2_4, stp2_5, stp2_6, stp2_7,
-          stp2_8, stp2_9, stp2_10, stp2_11, stp2_12, stp2_13, stp2_14, stp2_15,
-          stp2_16, stp2_17, stp2_18, stp2_19, stp2_20, stp2_21, stp2_22,
-          stp2_23, stp2_24, stp2_25, stp2_26, stp2_27, stp2_28, stp2_29,
-          stp2_30, stp2_31;
-  __m128i tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
-  int i;
-
-  // Load input data. Only need to load the top left 8x8 block.
-  in[0] = _mm_load_si128((const __m128i *)input);
-  in[1] = _mm_load_si128((const __m128i *)(input + 32));
-  in[2] = _mm_load_si128((const __m128i *)(input + 64));
-  in[3] = _mm_load_si128((const __m128i *)(input + 96));
-  in[4] = _mm_load_si128((const __m128i *)(input + 128));
-  in[5] = _mm_load_si128((const __m128i *)(input + 160));
-  in[6] = _mm_load_si128((const __m128i *)(input + 192));
-  in[7] = _mm_load_si128((const __m128i *)(input + 224));
-
-  for (i = 8; i < 32; ++i) {
-    in[i] = _mm_setzero_si128();
-  }
-
-  array_transpose_8x8(in, in);
-  // TODO(hkuang): Following transposes are unnecessary. But remove them will
-  // lead to performance drop on some devices.
-  array_transpose_8x8(in + 8, in + 8);
-  array_transpose_8x8(in + 16, in + 16);
-  array_transpose_8x8(in + 24, in + 24);
-
-  IDCT32_34
-
-  // 1_D: Store 32 intermediate results for each 8x32 block.
-  col[0] = _mm_add_epi16(stp1_0, stp1_31);
-  col[1] = _mm_add_epi16(stp1_1, stp1_30);
-  col[2] = _mm_add_epi16(stp1_2, stp1_29);
-  col[3] = _mm_add_epi16(stp1_3, stp1_28);
-  col[4] = _mm_add_epi16(stp1_4, stp1_27);
-  col[5] = _mm_add_epi16(stp1_5, stp1_26);
-  col[6] = _mm_add_epi16(stp1_6, stp1_25);
-  col[7] = _mm_add_epi16(stp1_7, stp1_24);
-  col[8] = _mm_add_epi16(stp1_8, stp1_23);
-  col[9] = _mm_add_epi16(stp1_9, stp1_22);
-  col[10] = _mm_add_epi16(stp1_10, stp1_21);
-  col[11] = _mm_add_epi16(stp1_11, stp1_20);
-  col[12] = _mm_add_epi16(stp1_12, stp1_19);
-  col[13] = _mm_add_epi16(stp1_13, stp1_18);
-  col[14] = _mm_add_epi16(stp1_14, stp1_17);
-  col[15] = _mm_add_epi16(stp1_15, stp1_16);
-  col[16] = _mm_sub_epi16(stp1_15, stp1_16);
-  col[17] = _mm_sub_epi16(stp1_14, stp1_17);
-  col[18] = _mm_sub_epi16(stp1_13, stp1_18);
-  col[19] = _mm_sub_epi16(stp1_12, stp1_19);
-  col[20] = _mm_sub_epi16(stp1_11, stp1_20);
-  col[21] = _mm_sub_epi16(stp1_10, stp1_21);
-  col[22] = _mm_sub_epi16(stp1_9, stp1_22);
-  col[23] = _mm_sub_epi16(stp1_8, stp1_23);
-  col[24] = _mm_sub_epi16(stp1_7, stp1_24);
-  col[25] = _mm_sub_epi16(stp1_6, stp1_25);
-  col[26] = _mm_sub_epi16(stp1_5, stp1_26);
-  col[27] = _mm_sub_epi16(stp1_4, stp1_27);
-  col[28] = _mm_sub_epi16(stp1_3, stp1_28);
-  col[29] = _mm_sub_epi16(stp1_2, stp1_29);
-  col[30] = _mm_sub_epi16(stp1_1, stp1_30);
-  col[31] = _mm_sub_epi16(stp1_0, stp1_31);
-  for (i = 0; i < 4; i++) {
-    int j;
-    const __m128i zero = _mm_setzero_si128();
-    // Transpose 32x8 block to 8x32 block
-    array_transpose_8x8(col + i * 8, in);
-    IDCT32_34
-
-    // 2_D: Calculate the results and store them to destination.
-    in[0] = _mm_add_epi16(stp1_0, stp1_31);
-    in[1] = _mm_add_epi16(stp1_1, stp1_30);
-    in[2] = _mm_add_epi16(stp1_2, stp1_29);
-    in[3] = _mm_add_epi16(stp1_3, stp1_28);
-    in[4] = _mm_add_epi16(stp1_4, stp1_27);
-    in[5] = _mm_add_epi16(stp1_5, stp1_26);
-    in[6] = _mm_add_epi16(stp1_6, stp1_25);
-    in[7] = _mm_add_epi16(stp1_7, stp1_24);
-    in[8] = _mm_add_epi16(stp1_8, stp1_23);
-    in[9] = _mm_add_epi16(stp1_9, stp1_22);
-    in[10] = _mm_add_epi16(stp1_10, stp1_21);
-    in[11] = _mm_add_epi16(stp1_11, stp1_20);
-    in[12] = _mm_add_epi16(stp1_12, stp1_19);
-    in[13] = _mm_add_epi16(stp1_13, stp1_18);
-    in[14] = _mm_add_epi16(stp1_14, stp1_17);
-    in[15] = _mm_add_epi16(stp1_15, stp1_16);
-    in[16] = _mm_sub_epi16(stp1_15, stp1_16);
-    in[17] = _mm_sub_epi16(stp1_14, stp1_17);
-    in[18] = _mm_sub_epi16(stp1_13, stp1_18);
-    in[19] = _mm_sub_epi16(stp1_12, stp1_19);
-    in[20] = _mm_sub_epi16(stp1_11, stp1_20);
-    in[21] = _mm_sub_epi16(stp1_10, stp1_21);
-    in[22] = _mm_sub_epi16(stp1_9, stp1_22);
-    in[23] = _mm_sub_epi16(stp1_8, stp1_23);
-    in[24] = _mm_sub_epi16(stp1_7, stp1_24);
-    in[25] = _mm_sub_epi16(stp1_6, stp1_25);
-    in[26] = _mm_sub_epi16(stp1_5, stp1_26);
-    in[27] = _mm_sub_epi16(stp1_4, stp1_27);
-    in[28] = _mm_sub_epi16(stp1_3, stp1_28);
-    in[29] = _mm_sub_epi16(stp1_2, stp1_29);
-    in[30] = _mm_sub_epi16(stp1_1, stp1_30);
-    in[31] = _mm_sub_epi16(stp1_0, stp1_31);
-
-    for (j = 0; j < 32; ++j) {
-      // Final rounding and shift
-      in[j] = _mm_adds_epi16(in[j], final_rounding);
-      in[j] = _mm_srai_epi16(in[j], 6);
-      RECON_AND_STORE(dest + j * stride, in[j]);
-    }
-
-    dest += 8;
-  }
-}
-
-void vp9_idct32x32_1024_add_sse2(const int16_t *input, uint8_t *dest,
-                                 int stride) {
-  const __m128i rounding = _mm_set1_epi32(DCT_CONST_ROUNDING);
-  const __m128i final_rounding = _mm_set1_epi16(1 << 5);
-  const __m128i zero = _mm_setzero_si128();
-
-  // idct constants for each stage
-  const __m128i stg1_0 = pair_set_epi16(cospi_31_64, -cospi_1_64);
-  const __m128i stg1_1 = pair_set_epi16(cospi_1_64, cospi_31_64);
-  const __m128i stg1_2 = pair_set_epi16(cospi_15_64, -cospi_17_64);
-  const __m128i stg1_3 = pair_set_epi16(cospi_17_64, cospi_15_64);
-  const __m128i stg1_4 = pair_set_epi16(cospi_23_64, -cospi_9_64);
-  const __m128i stg1_5 = pair_set_epi16(cospi_9_64, cospi_23_64);
-  const __m128i stg1_6 = pair_set_epi16(cospi_7_64, -cospi_25_64);
-  const __m128i stg1_7 = pair_set_epi16(cospi_25_64, cospi_7_64);
-  const __m128i stg1_8 = pair_set_epi16(cospi_27_64, -cospi_5_64);
-  const __m128i stg1_9 = pair_set_epi16(cospi_5_64, cospi_27_64);
-  const __m128i stg1_10 = pair_set_epi16(cospi_11_64, -cospi_21_64);
-  const __m128i stg1_11 = pair_set_epi16(cospi_21_64, cospi_11_64);
-  const __m128i stg1_12 = pair_set_epi16(cospi_19_64, -cospi_13_64);
-  const __m128i stg1_13 = pair_set_epi16(cospi_13_64, cospi_19_64);
-  const __m128i stg1_14 = pair_set_epi16(cospi_3_64, -cospi_29_64);
-  const __m128i stg1_15 = pair_set_epi16(cospi_29_64, cospi_3_64);
-
-  const __m128i stg2_0 = pair_set_epi16(cospi_30_64, -cospi_2_64);
-  const __m128i stg2_1 = pair_set_epi16(cospi_2_64, cospi_30_64);
-  const __m128i stg2_2 = pair_set_epi16(cospi_14_64, -cospi_18_64);
-  const __m128i stg2_3 = pair_set_epi16(cospi_18_64, cospi_14_64);
-  const __m128i stg2_4 = pair_set_epi16(cospi_22_64, -cospi_10_64);
-  const __m128i stg2_5 = pair_set_epi16(cospi_10_64, cospi_22_64);
-  const __m128i stg2_6 = pair_set_epi16(cospi_6_64, -cospi_26_64);
-  const __m128i stg2_7 = pair_set_epi16(cospi_26_64, cospi_6_64);
-
-  const __m128i stg3_0 = pair_set_epi16(cospi_28_64, -cospi_4_64);
-  const __m128i stg3_1 = pair_set_epi16(cospi_4_64, cospi_28_64);
-  const __m128i stg3_2 = pair_set_epi16(cospi_12_64, -cospi_20_64);
-  const __m128i stg3_3 = pair_set_epi16(cospi_20_64, cospi_12_64);
-  const __m128i stg3_4 = pair_set_epi16(-cospi_4_64, cospi_28_64);
-  const __m128i stg3_5 = pair_set_epi16(cospi_28_64, cospi_4_64);
-  const __m128i stg3_6 = pair_set_epi16(-cospi_28_64, -cospi_4_64);
-  const __m128i stg3_8 = pair_set_epi16(-cospi_20_64, cospi_12_64);
-  const __m128i stg3_9 = pair_set_epi16(cospi_12_64, cospi_20_64);
-  const __m128i stg3_10 = pair_set_epi16(-cospi_12_64, -cospi_20_64);
-
-  const __m128i stg4_0 = pair_set_epi16(cospi_16_64, cospi_16_64);
-  const __m128i stg4_1 = pair_set_epi16(cospi_16_64, -cospi_16_64);
-  const __m128i stg4_2 = pair_set_epi16(cospi_24_64, -cospi_8_64);
-  const __m128i stg4_3 = pair_set_epi16(cospi_8_64, cospi_24_64);
-  const __m128i stg4_4 = pair_set_epi16(-cospi_8_64, cospi_24_64);
-  const __m128i stg4_5 = pair_set_epi16(cospi_24_64, cospi_8_64);
-  const __m128i stg4_6 = pair_set_epi16(-cospi_24_64, -cospi_8_64);
-
-  const __m128i stg6_0 = pair_set_epi16(-cospi_16_64, cospi_16_64);
-
-  __m128i in[32], col[128], zero_idx[16];
-  __m128i stp1_0, stp1_1, stp1_2, stp1_3, stp1_4, stp1_5, stp1_6, stp1_7,
-          stp1_8, stp1_9, stp1_10, stp1_11, stp1_12, stp1_13, stp1_14, stp1_15,
-          stp1_16, stp1_17, stp1_18, stp1_19, stp1_20, stp1_21, stp1_22,
-          stp1_23, stp1_24, stp1_25, stp1_26, stp1_27, stp1_28, stp1_29,
-          stp1_30, stp1_31;
-  __m128i stp2_0, stp2_1, stp2_2, stp2_3, stp2_4, stp2_5, stp2_6, stp2_7,
-          stp2_8, stp2_9, stp2_10, stp2_11, stp2_12, stp2_13, stp2_14, stp2_15,
-          stp2_16, stp2_17, stp2_18, stp2_19, stp2_20, stp2_21, stp2_22,
-          stp2_23, stp2_24, stp2_25, stp2_26, stp2_27, stp2_28, stp2_29,
-          stp2_30, stp2_31;
-  __m128i tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
-  int i, j, i32;
-
-  for (i = 0; i < 4; i++) {
-    i32 = (i << 5);
-    // First 1-D idct
-    // Load input data.
-    LOAD_DQCOEFF(in[0], input);
-    LOAD_DQCOEFF(in[8], input);
-    LOAD_DQCOEFF(in[16], input);
-    LOAD_DQCOEFF(in[24], input);
-    LOAD_DQCOEFF(in[1], input);
-    LOAD_DQCOEFF(in[9], input);
-    LOAD_DQCOEFF(in[17], input);
-    LOAD_DQCOEFF(in[25], input);
-    LOAD_DQCOEFF(in[2], input);
-    LOAD_DQCOEFF(in[10], input);
-    LOAD_DQCOEFF(in[18], input);
-    LOAD_DQCOEFF(in[26], input);
-    LOAD_DQCOEFF(in[3], input);
-    LOAD_DQCOEFF(in[11], input);
-    LOAD_DQCOEFF(in[19], input);
-    LOAD_DQCOEFF(in[27], input);
-
-    LOAD_DQCOEFF(in[4], input);
-    LOAD_DQCOEFF(in[12], input);
-    LOAD_DQCOEFF(in[20], input);
-    LOAD_DQCOEFF(in[28], input);
-    LOAD_DQCOEFF(in[5], input);
-    LOAD_DQCOEFF(in[13], input);
-    LOAD_DQCOEFF(in[21], input);
-    LOAD_DQCOEFF(in[29], input);
-    LOAD_DQCOEFF(in[6], input);
-    LOAD_DQCOEFF(in[14], input);
-    LOAD_DQCOEFF(in[22], input);
-    LOAD_DQCOEFF(in[30], input);
-    LOAD_DQCOEFF(in[7], input);
-    LOAD_DQCOEFF(in[15], input);
-    LOAD_DQCOEFF(in[23], input);
-    LOAD_DQCOEFF(in[31], input);
-
-    // checking if all entries are zero
-    zero_idx[0] = _mm_or_si128(in[0], in[1]);
-    zero_idx[1] = _mm_or_si128(in[2], in[3]);
-    zero_idx[2] = _mm_or_si128(in[4], in[5]);
-    zero_idx[3] = _mm_or_si128(in[6], in[7]);
-    zero_idx[4] = _mm_or_si128(in[8], in[9]);
-    zero_idx[5] = _mm_or_si128(in[10], in[11]);
-    zero_idx[6] = _mm_or_si128(in[12], in[13]);
-    zero_idx[7] = _mm_or_si128(in[14], in[15]);
-    zero_idx[8] = _mm_or_si128(in[16], in[17]);
-    zero_idx[9] = _mm_or_si128(in[18], in[19]);
-    zero_idx[10] = _mm_or_si128(in[20], in[21]);
-    zero_idx[11] = _mm_or_si128(in[22], in[23]);
-    zero_idx[12] = _mm_or_si128(in[24], in[25]);
-    zero_idx[13] = _mm_or_si128(in[26], in[27]);
-    zero_idx[14] = _mm_or_si128(in[28], in[29]);
-    zero_idx[15] = _mm_or_si128(in[30], in[31]);
-
-    zero_idx[0] = _mm_or_si128(zero_idx[0], zero_idx[1]);
-    zero_idx[1] = _mm_or_si128(zero_idx[2], zero_idx[3]);
-    zero_idx[2] = _mm_or_si128(zero_idx[4], zero_idx[5]);
-    zero_idx[3] = _mm_or_si128(zero_idx[6], zero_idx[7]);
-    zero_idx[4] = _mm_or_si128(zero_idx[8], zero_idx[9]);
-    zero_idx[5] = _mm_or_si128(zero_idx[10], zero_idx[11]);
-    zero_idx[6] = _mm_or_si128(zero_idx[12], zero_idx[13]);
-    zero_idx[7] = _mm_or_si128(zero_idx[14], zero_idx[15]);
-
-    zero_idx[8] = _mm_or_si128(zero_idx[0], zero_idx[1]);
-    zero_idx[9] = _mm_or_si128(zero_idx[2], zero_idx[3]);
-    zero_idx[10] = _mm_or_si128(zero_idx[4], zero_idx[5]);
-    zero_idx[11] = _mm_or_si128(zero_idx[6], zero_idx[7]);
-    zero_idx[12] = _mm_or_si128(zero_idx[8], zero_idx[9]);
-    zero_idx[13] = _mm_or_si128(zero_idx[10], zero_idx[11]);
-    zero_idx[14] = _mm_or_si128(zero_idx[12], zero_idx[13]);
-
-    if (_mm_movemask_epi8(_mm_cmpeq_epi32(zero_idx[14], zero)) == 0xFFFF) {
-      col[i32 + 0] = _mm_setzero_si128();
-      col[i32 + 1] = _mm_setzero_si128();
-      col[i32 + 2] = _mm_setzero_si128();
-      col[i32 + 3] = _mm_setzero_si128();
-      col[i32 + 4] = _mm_setzero_si128();
-      col[i32 + 5] = _mm_setzero_si128();
-      col[i32 + 6] = _mm_setzero_si128();
-      col[i32 + 7] = _mm_setzero_si128();
-      col[i32 + 8] = _mm_setzero_si128();
-      col[i32 + 9] = _mm_setzero_si128();
-      col[i32 + 10] = _mm_setzero_si128();
-      col[i32 + 11] = _mm_setzero_si128();
-      col[i32 + 12] = _mm_setzero_si128();
-      col[i32 + 13] = _mm_setzero_si128();
-      col[i32 + 14] = _mm_setzero_si128();
-      col[i32 + 15] = _mm_setzero_si128();
-      col[i32 + 16] = _mm_setzero_si128();
-      col[i32 + 17] = _mm_setzero_si128();
-      col[i32 + 18] = _mm_setzero_si128();
-      col[i32 + 19] = _mm_setzero_si128();
-      col[i32 + 20] = _mm_setzero_si128();
-      col[i32 + 21] = _mm_setzero_si128();
-      col[i32 + 22] = _mm_setzero_si128();
-      col[i32 + 23] = _mm_setzero_si128();
-      col[i32 + 24] = _mm_setzero_si128();
-      col[i32 + 25] = _mm_setzero_si128();
-      col[i32 + 26] = _mm_setzero_si128();
-      col[i32 + 27] = _mm_setzero_si128();
-      col[i32 + 28] = _mm_setzero_si128();
-      col[i32 + 29] = _mm_setzero_si128();
-      col[i32 + 30] = _mm_setzero_si128();
-      col[i32 + 31] = _mm_setzero_si128();
-      continue;
-    }
-
-    // Transpose 32x8 block to 8x32 block
-    array_transpose_8x8(in, in);
-    array_transpose_8x8(in + 8, in + 8);
-    array_transpose_8x8(in + 16, in + 16);
-    array_transpose_8x8(in + 24, in + 24);
-
-    IDCT32
-
-    // 1_D: Store 32 intermediate results for each 8x32 block.
-    col[i32 + 0] = _mm_add_epi16(stp1_0, stp1_31);
-    col[i32 + 1] = _mm_add_epi16(stp1_1, stp1_30);
-    col[i32 + 2] = _mm_add_epi16(stp1_2, stp1_29);
-    col[i32 + 3] = _mm_add_epi16(stp1_3, stp1_28);
-    col[i32 + 4] = _mm_add_epi16(stp1_4, stp1_27);
-    col[i32 + 5] = _mm_add_epi16(stp1_5, stp1_26);
-    col[i32 + 6] = _mm_add_epi16(stp1_6, stp1_25);
-    col[i32 + 7] = _mm_add_epi16(stp1_7, stp1_24);
-    col[i32 + 8] = _mm_add_epi16(stp1_8, stp1_23);
-    col[i32 + 9] = _mm_add_epi16(stp1_9, stp1_22);
-    col[i32 + 10] = _mm_add_epi16(stp1_10, stp1_21);
-    col[i32 + 11] = _mm_add_epi16(stp1_11, stp1_20);
-    col[i32 + 12] = _mm_add_epi16(stp1_12, stp1_19);
-    col[i32 + 13] = _mm_add_epi16(stp1_13, stp1_18);
-    col[i32 + 14] = _mm_add_epi16(stp1_14, stp1_17);
-    col[i32 + 15] = _mm_add_epi16(stp1_15, stp1_16);
-    col[i32 + 16] = _mm_sub_epi16(stp1_15, stp1_16);
-    col[i32 + 17] = _mm_sub_epi16(stp1_14, stp1_17);
-    col[i32 + 18] = _mm_sub_epi16(stp1_13, stp1_18);
-    col[i32 + 19] = _mm_sub_epi16(stp1_12, stp1_19);
-    col[i32 + 20] = _mm_sub_epi16(stp1_11, stp1_20);
-    col[i32 + 21] = _mm_sub_epi16(stp1_10, stp1_21);
-    col[i32 + 22] = _mm_sub_epi16(stp1_9, stp1_22);
-    col[i32 + 23] = _mm_sub_epi16(stp1_8, stp1_23);
-    col[i32 + 24] = _mm_sub_epi16(stp1_7, stp1_24);
-    col[i32 + 25] = _mm_sub_epi16(stp1_6, stp1_25);
-    col[i32 + 26] = _mm_sub_epi16(stp1_5, stp1_26);
-    col[i32 + 27] = _mm_sub_epi16(stp1_4, stp1_27);
-    col[i32 + 28] = _mm_sub_epi16(stp1_3, stp1_28);
-    col[i32 + 29] = _mm_sub_epi16(stp1_2, stp1_29);
-    col[i32 + 30] = _mm_sub_epi16(stp1_1, stp1_30);
-    col[i32 + 31] = _mm_sub_epi16(stp1_0, stp1_31);
-  }
-  for (i = 0; i < 4; i++) {
-    // Second 1-D idct
-    j = i << 3;
-
-    // Transpose 32x8 block to 8x32 block
-    array_transpose_8x8(col + j, in);
-    array_transpose_8x8(col + j + 32, in + 8);
-    array_transpose_8x8(col + j + 64, in + 16);
-    array_transpose_8x8(col + j + 96, in + 24);
-
-    IDCT32
-
-    // 2_D: Calculate the results and store them to destination.
-    in[0] = _mm_add_epi16(stp1_0, stp1_31);
-    in[1] = _mm_add_epi16(stp1_1, stp1_30);
-    in[2] = _mm_add_epi16(stp1_2, stp1_29);
-    in[3] = _mm_add_epi16(stp1_3, stp1_28);
-    in[4] = _mm_add_epi16(stp1_4, stp1_27);
-    in[5] = _mm_add_epi16(stp1_5, stp1_26);
-    in[6] = _mm_add_epi16(stp1_6, stp1_25);
-    in[7] = _mm_add_epi16(stp1_7, stp1_24);
-    in[8] = _mm_add_epi16(stp1_8, stp1_23);
-    in[9] = _mm_add_epi16(stp1_9, stp1_22);
-    in[10] = _mm_add_epi16(stp1_10, stp1_21);
-    in[11] = _mm_add_epi16(stp1_11, stp1_20);
-    in[12] = _mm_add_epi16(stp1_12, stp1_19);
-    in[13] = _mm_add_epi16(stp1_13, stp1_18);
-    in[14] = _mm_add_epi16(stp1_14, stp1_17);
-    in[15] = _mm_add_epi16(stp1_15, stp1_16);
-    in[16] = _mm_sub_epi16(stp1_15, stp1_16);
-    in[17] = _mm_sub_epi16(stp1_14, stp1_17);
-    in[18] = _mm_sub_epi16(stp1_13, stp1_18);
-    in[19] = _mm_sub_epi16(stp1_12, stp1_19);
-    in[20] = _mm_sub_epi16(stp1_11, stp1_20);
-    in[21] = _mm_sub_epi16(stp1_10, stp1_21);
-    in[22] = _mm_sub_epi16(stp1_9, stp1_22);
-    in[23] = _mm_sub_epi16(stp1_8, stp1_23);
-    in[24] = _mm_sub_epi16(stp1_7, stp1_24);
-    in[25] = _mm_sub_epi16(stp1_6, stp1_25);
-    in[26] = _mm_sub_epi16(stp1_5, stp1_26);
-    in[27] = _mm_sub_epi16(stp1_4, stp1_27);
-    in[28] = _mm_sub_epi16(stp1_3, stp1_28);
-    in[29] = _mm_sub_epi16(stp1_2, stp1_29);
-    in[30] = _mm_sub_epi16(stp1_1, stp1_30);
-    in[31] = _mm_sub_epi16(stp1_0, stp1_31);
-
-    for (j = 0; j < 32; ++j) {
-      // Final rounding and shift
-      in[j] = _mm_adds_epi16(in[j], final_rounding);
-      in[j] = _mm_srai_epi16(in[j], 6);
-      RECON_AND_STORE(dest + j * stride, in[j]);
-    }
-
-    dest += 8;
-  }
-}
-
-void vp9_idct32x32_1_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
-  __m128i dc_value;
-  const __m128i zero = _mm_setzero_si128();
-  int a, i;
-
-  a = dct_const_round_shift(input[0] * cospi_16_64);
-  a = dct_const_round_shift(a * cospi_16_64);
-  a = ROUND_POWER_OF_TWO(a, 6);
-
-  dc_value = _mm_set1_epi16(a);
-
-  for (i = 0; i < 4; ++i) {
-    int j;
-    for (j = 0; j < 32; ++j) {
-      RECON_AND_STORE(dest + j * stride, dc_value);
-    }
-    dest += 8;
-  }
-}
-
-#if CONFIG_VP9_HIGHBITDEPTH
-static INLINE __m128i clamp_high_sse2(__m128i value, int bd) {
-  __m128i ubounded, retval;
-  const __m128i zero = _mm_set1_epi16(0);
-  const __m128i one = _mm_set1_epi16(1);
-  const __m128i max = _mm_subs_epi16(_mm_slli_epi16(one, bd), one);
-  ubounded = _mm_cmpgt_epi16(value, max);
-  retval = _mm_andnot_si128(ubounded, value);
-  ubounded = _mm_and_si128(ubounded, max);
-  retval = _mm_or_si128(retval, ubounded);
-  retval = _mm_and_si128(retval, _mm_cmpgt_epi16(retval, zero));
-  return retval;
-}
-
-void vp9_highbd_idct4x4_16_add_sse2(const tran_low_t *input, uint8_t *dest8,
-                                    int stride, int bd) {
-  tran_low_t out[4 * 4];
-  tran_low_t *outptr = out;
-  int i, j;
-  __m128i inptr[4];
-  __m128i sign_bits[2];
-  __m128i temp_mm, min_input, max_input;
-  int test;
-  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
-  int optimised_cols = 0;
-  const __m128i zero = _mm_set1_epi16(0);
-  const __m128i eight = _mm_set1_epi16(8);
-  const __m128i max = _mm_set1_epi16(12043);
-  const __m128i min = _mm_set1_epi16(-12043);
-  // Load input into __m128i
-  inptr[0] = _mm_loadu_si128((const __m128i *)input);
-  inptr[1] = _mm_loadu_si128((const __m128i *)(input + 4));
-  inptr[2] = _mm_loadu_si128((const __m128i *)(input + 8));
-  inptr[3] = _mm_loadu_si128((const __m128i *)(input + 12));
-
-  // Pack to 16 bits
-  inptr[0] = _mm_packs_epi32(inptr[0], inptr[1]);
-  inptr[1] = _mm_packs_epi32(inptr[2], inptr[3]);
-
-  max_input = _mm_max_epi16(inptr[0], inptr[1]);
-  min_input = _mm_min_epi16(inptr[0], inptr[1]);
-  max_input = _mm_cmpgt_epi16(max_input, max);
-  min_input = _mm_cmplt_epi16(min_input, min);
-  temp_mm = _mm_or_si128(max_input, min_input);
-  test = _mm_movemask_epi8(temp_mm);
-
-  if (!test) {
-    // Do the row transform
-    idct4_sse2(inptr);
-
-    // Check the min & max values
-    max_input = _mm_max_epi16(inptr[0], inptr[1]);
-    min_input = _mm_min_epi16(inptr[0], inptr[1]);
-    max_input = _mm_cmpgt_epi16(max_input, max);
-    min_input = _mm_cmplt_epi16(min_input, min);
-    temp_mm = _mm_or_si128(max_input, min_input);
-    test = _mm_movemask_epi8(temp_mm);
-
-    if (test) {
-      transpose_4x4(inptr);
-      sign_bits[0] = _mm_cmplt_epi16(inptr[0], zero);
-      sign_bits[1] = _mm_cmplt_epi16(inptr[1], zero);
-      inptr[3] = _mm_unpackhi_epi16(inptr[1], sign_bits[1]);
-      inptr[2] = _mm_unpacklo_epi16(inptr[1], sign_bits[1]);
-      inptr[1] = _mm_unpackhi_epi16(inptr[0], sign_bits[0]);
-      inptr[0] = _mm_unpacklo_epi16(inptr[0], sign_bits[0]);
-      _mm_storeu_si128((__m128i *)outptr, inptr[0]);
-      _mm_storeu_si128((__m128i *)(outptr + 4), inptr[1]);
-      _mm_storeu_si128((__m128i *)(outptr + 8), inptr[2]);
-      _mm_storeu_si128((__m128i *)(outptr + 12), inptr[3]);
-    } else {
-      // Set to use the optimised transform for the column
-      optimised_cols = 1;
-    }
-  } else {
-    // Run the un-optimised row transform
-    for (i = 0; i < 4; ++i) {
-      vp9_highbd_idct4(input, outptr, bd);
-      input += 4;
-      outptr += 4;
-    }
-  }
-
-  if (optimised_cols) {
-    idct4_sse2(inptr);
-
-    // Final round and shift
-    inptr[0] = _mm_add_epi16(inptr[0], eight);
-    inptr[1] = _mm_add_epi16(inptr[1], eight);
-
-    inptr[0] = _mm_srai_epi16(inptr[0], 4);
-    inptr[1] = _mm_srai_epi16(inptr[1], 4);
-
-    // Reconstruction and Store
-    {
-      __m128i d0 = _mm_loadl_epi64((const __m128i *)dest);
-      __m128i d2 = _mm_loadl_epi64((const __m128i *)(dest + stride * 2));
-      d0 = _mm_unpacklo_epi64(
-          d0, _mm_loadl_epi64((const __m128i *)(dest + stride)));
-      d2 = _mm_unpacklo_epi64(
-          d2, _mm_loadl_epi64((const __m128i *)(dest + stride * 3)));
-      d0 = clamp_high_sse2(_mm_adds_epi16(d0, inptr[0]), bd);
-      d2 = clamp_high_sse2(_mm_adds_epi16(d2, inptr[1]), bd);
-      // store input0
-      _mm_storel_epi64((__m128i *)dest, d0);
-      // store input1
-      d0 = _mm_srli_si128(d0, 8);
-      _mm_storel_epi64((__m128i *)(dest + stride), d0);
-      // store input2
-      _mm_storel_epi64((__m128i *)(dest + stride * 2), d2);
-      // store input3
-      d2 = _mm_srli_si128(d2, 8);
-      _mm_storel_epi64((__m128i *)(dest + stride * 3), d2);
-    }
-  } else {
-    // Run the un-optimised column transform
-    tran_low_t temp_in[4], temp_out[4];
-    // Columns
-    for (i = 0; i < 4; ++i) {
-      for (j = 0; j < 4; ++j)
-        temp_in[j] = out[j * 4 + i];
-      vp9_highbd_idct4(temp_in, temp_out, bd);
-      for (j = 0; j < 4; ++j) {
-        dest[j * stride + i] = highbd_clip_pixel_add(
-            dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 4), bd);
-      }
-    }
-  }
-}
-
-void vp9_highbd_idct8x8_64_add_sse2(const tran_low_t *input, uint8_t *dest8,
-                                    int stride, int bd) {
-  tran_low_t out[8 * 8];
-  tran_low_t *outptr = out;
-  int i, j, test;
-  __m128i inptr[8];
-  __m128i min_input, max_input, temp1, temp2, sign_bits;
-  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
-  const __m128i zero = _mm_set1_epi16(0);
-  const __m128i sixteen = _mm_set1_epi16(16);
-  const __m128i max = _mm_set1_epi16(6201);
-  const __m128i min = _mm_set1_epi16(-6201);
-  int optimised_cols = 0;
-
-  // Load input into __m128i & pack to 16 bits
-  for (i = 0; i < 8; i++) {
-    temp1 = _mm_loadu_si128((const __m128i *)(input + 8 * i));
-    temp2 = _mm_loadu_si128((const __m128i *)(input + 8 * i + 4));
-    inptr[i] = _mm_packs_epi32(temp1, temp2);
-  }
-
-  // Find the min & max for the row transform
-  max_input = _mm_max_epi16(inptr[0], inptr[1]);
-  min_input = _mm_min_epi16(inptr[0], inptr[1]);
-  for (i = 2; i < 8; i++) {
-    max_input = _mm_max_epi16(max_input, inptr[i]);
-    min_input = _mm_min_epi16(min_input, inptr[i]);
-  }
-  max_input = _mm_cmpgt_epi16(max_input, max);
-  min_input = _mm_cmplt_epi16(min_input, min);
-  temp1 = _mm_or_si128(max_input, min_input);
-  test = _mm_movemask_epi8(temp1);
-
-  if (!test) {
-    // Do the row transform
-    idct8_sse2(inptr);
-
-    // Find the min & max for the column transform
-    max_input = _mm_max_epi16(inptr[0], inptr[1]);
-    min_input = _mm_min_epi16(inptr[0], inptr[1]);
-    for (i = 2; i < 8; i++) {
-      max_input = _mm_max_epi16(max_input, inptr[i]);
-      min_input = _mm_min_epi16(min_input, inptr[i]);
-    }
-    max_input = _mm_cmpgt_epi16(max_input, max);
-    min_input = _mm_cmplt_epi16(min_input, min);
-    temp1 = _mm_or_si128(max_input, min_input);
-    test = _mm_movemask_epi8(temp1);
-
-    if (test) {
-      array_transpose_8x8(inptr, inptr);
-      for (i = 0; i < 8; i++) {
-        sign_bits = _mm_cmplt_epi16(inptr[i], zero);
-        temp1 = _mm_unpackhi_epi16(inptr[i], sign_bits);
-        temp2 = _mm_unpacklo_epi16(inptr[i], sign_bits);
-        _mm_storeu_si128((__m128i *)(outptr + 4 * (2 * i + 1)), temp1);
-        _mm_storeu_si128((__m128i *)(outptr + 4 * (2 * i)), temp2);
-      }
-    } else {
-      // Set to use the optimised transform for the column
-      optimised_cols = 1;
-    }
-  } else {
-    // Run the un-optimised row transform
-    for (i = 0; i < 8; ++i) {
-      vp9_highbd_idct8(input, outptr, bd);
-      input += 8;
-      outptr += 8;
-    }
-  }
-
-  if (optimised_cols) {
-    idct8_sse2(inptr);
-
-    // Final round & shift and Reconstruction and Store
-    {
-      __m128i d[8];
-      for (i = 0; i < 8; i++) {
-        inptr[i] = _mm_add_epi16(inptr[i], sixteen);
-        d[i] = _mm_loadu_si128((const __m128i *)(dest + stride*i));
-        inptr[i] = _mm_srai_epi16(inptr[i], 5);
-        d[i] = clamp_high_sse2(_mm_adds_epi16(d[i], inptr[i]), bd);
-        // Store
-        _mm_storeu_si128((__m128i *)(dest + stride*i), d[i]);
-      }
-    }
-  } else {
-    // Run the un-optimised column transform
-    tran_low_t temp_in[8], temp_out[8];
-    for (i = 0; i < 8; ++i) {
-      for (j = 0; j < 8; ++j)
-        temp_in[j] = out[j * 8 + i];
-      vp9_highbd_idct8(temp_in, temp_out, bd);
-      for (j = 0; j < 8; ++j) {
-        dest[j * stride + i] = highbd_clip_pixel_add(
-            dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 5), bd);
-      }
-    }
-  }
-}
-
-void vp9_highbd_idct8x8_10_add_sse2(const tran_low_t *input, uint8_t *dest8,
-                                    int stride, int bd) {
-  tran_low_t out[8 * 8] = { 0 };
-  tran_low_t *outptr = out;
-  int i, j, test;
-  __m128i inptr[8];
-  __m128i min_input, max_input, temp1, temp2, sign_bits;
-  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
-  const __m128i zero = _mm_set1_epi16(0);
-  const __m128i sixteen = _mm_set1_epi16(16);
-  const __m128i max = _mm_set1_epi16(6201);
-  const __m128i min = _mm_set1_epi16(-6201);
-  int optimised_cols = 0;
-
-  // Load input into __m128i & pack to 16 bits
-  for (i = 0; i < 8; i++) {
-    temp1 = _mm_loadu_si128((const __m128i *)(input + 8 * i));
-    temp2 = _mm_loadu_si128((const __m128i *)(input + 8 * i + 4));
-    inptr[i] = _mm_packs_epi32(temp1, temp2);
-  }
-
-  // Find the min & max for the row transform
-  // only first 4 row has non-zero coefs
-  max_input = _mm_max_epi16(inptr[0], inptr[1]);
-  min_input = _mm_min_epi16(inptr[0], inptr[1]);
-  for (i = 2; i < 4; i++) {
-    max_input = _mm_max_epi16(max_input, inptr[i]);
-    min_input = _mm_min_epi16(min_input, inptr[i]);
-  }
-  max_input = _mm_cmpgt_epi16(max_input, max);
-  min_input = _mm_cmplt_epi16(min_input, min);
-  temp1 = _mm_or_si128(max_input, min_input);
-  test = _mm_movemask_epi8(temp1);
-
-  if (!test) {
-    // Do the row transform
-    idct8_sse2(inptr);
-
-    // Find the min & max for the column transform
-    // N.B. Only first 4 cols contain non-zero coeffs
-    max_input = _mm_max_epi16(inptr[0], inptr[1]);
-    min_input = _mm_min_epi16(inptr[0], inptr[1]);
-    for (i = 2; i < 8; i++) {
-      max_input = _mm_max_epi16(max_input, inptr[i]);
-      min_input = _mm_min_epi16(min_input, inptr[i]);
-    }
-    max_input = _mm_cmpgt_epi16(max_input, max);
-    min_input = _mm_cmplt_epi16(min_input, min);
-    temp1 = _mm_or_si128(max_input, min_input);
-    test = _mm_movemask_epi8(temp1);
-
-    if (test) {
-      // Use fact only first 4 rows contain non-zero coeffs
-      array_transpose_4X8(inptr, inptr);
-      for (i = 0; i < 4; i++) {
-        sign_bits = _mm_cmplt_epi16(inptr[i], zero);
-        temp1 = _mm_unpackhi_epi16(inptr[i], sign_bits);
-        temp2 = _mm_unpacklo_epi16(inptr[i], sign_bits);
-        _mm_storeu_si128((__m128i *)(outptr + 4 * (2 * i + 1)), temp1);
-        _mm_storeu_si128((__m128i *)(outptr + 4 * (2 * i)), temp2);
-      }
-    } else {
-      // Set to use the optimised transform for the column
-      optimised_cols = 1;
-    }
-  } else {
-    // Run the un-optimised row transform
-    for (i = 0; i < 4; ++i) {
-      vp9_highbd_idct8(input, outptr, bd);
-      input += 8;
-      outptr += 8;
-    }
-  }
-
-  if (optimised_cols) {
-    idct8_sse2(inptr);
-
-    // Final round & shift and Reconstruction and Store
-    {
-      __m128i d[8];
-      for (i = 0; i < 8; i++) {
-        inptr[i] = _mm_add_epi16(inptr[i], sixteen);
-        d[i] = _mm_loadu_si128((const __m128i *)(dest + stride*i));
-        inptr[i] = _mm_srai_epi16(inptr[i], 5);
-        d[i] = clamp_high_sse2(_mm_adds_epi16(d[i], inptr[i]), bd);
-        // Store
-        _mm_storeu_si128((__m128i *)(dest + stride*i), d[i]);
-      }
-    }
-  } else {
-    // Run the un-optimised column transform
-    tran_low_t temp_in[8], temp_out[8];
-    for (i = 0; i < 8; ++i) {
-      for (j = 0; j < 8; ++j)
-        temp_in[j] = out[j * 8 + i];
-      vp9_highbd_idct8(temp_in, temp_out, bd);
-      for (j = 0; j < 8; ++j) {
-        dest[j * stride + i] = highbd_clip_pixel_add(
-            dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 5), bd);
-      }
-    }
-  }
-}
-
-void vp9_highbd_idct16x16_256_add_sse2(const tran_low_t *input, uint8_t *dest8,
-                                       int stride, int bd) {
-  tran_low_t out[16 * 16];
-  tran_low_t *outptr = out;
-  int i, j, test;
-  __m128i inptr[32];
-  __m128i min_input, max_input, temp1, temp2, sign_bits;
-  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
-  const __m128i zero = _mm_set1_epi16(0);
-  const __m128i rounding = _mm_set1_epi16(32);
-  const __m128i max = _mm_set1_epi16(3155);
-  const __m128i min = _mm_set1_epi16(-3155);
-  int optimised_cols = 0;
-
-  // Load input into __m128i & pack to 16 bits
-  for (i = 0; i < 16; i++) {
-    temp1 = _mm_loadu_si128((const __m128i *)(input + 16 * i));
-    temp2 = _mm_loadu_si128((const __m128i *)(input + 16 * i + 4));
-    inptr[i] = _mm_packs_epi32(temp1, temp2);
-    temp1 = _mm_loadu_si128((const __m128i *)(input + 16 * i + 8));
-    temp2 = _mm_loadu_si128((const __m128i *)(input + 16 * i + 12));
-    inptr[i + 16] = _mm_packs_epi32(temp1, temp2);
-  }
-
-  // Find the min & max for the row transform
-  max_input = _mm_max_epi16(inptr[0], inptr[1]);
-  min_input = _mm_min_epi16(inptr[0], inptr[1]);
-  for (i = 2; i < 32; i++) {
-    max_input = _mm_max_epi16(max_input, inptr[i]);
-    min_input = _mm_min_epi16(min_input, inptr[i]);
-  }
-  max_input = _mm_cmpgt_epi16(max_input, max);
-  min_input = _mm_cmplt_epi16(min_input, min);
-  temp1 = _mm_or_si128(max_input, min_input);
-  test = _mm_movemask_epi8(temp1);
-
-  if (!test) {
-    // Do the row transform
-    idct16_sse2(inptr, inptr + 16);
-
-    // Find the min & max for the column transform
-    max_input = _mm_max_epi16(inptr[0], inptr[1]);
-    min_input = _mm_min_epi16(inptr[0], inptr[1]);
-    for (i = 2; i < 32; i++) {
-      max_input = _mm_max_epi16(max_input, inptr[i]);
-      min_input = _mm_min_epi16(min_input, inptr[i]);
-    }
-    max_input = _mm_cmpgt_epi16(max_input, max);
-    min_input = _mm_cmplt_epi16(min_input, min);
-    temp1 = _mm_or_si128(max_input, min_input);
-    test = _mm_movemask_epi8(temp1);
-
-    if (test) {
-      array_transpose_16x16(inptr, inptr + 16);
-      for (i = 0; i < 16; i++) {
-        sign_bits = _mm_cmplt_epi16(inptr[i], zero);
-        temp1 = _mm_unpacklo_epi16(inptr[i], sign_bits);
-        temp2 = _mm_unpackhi_epi16(inptr[i], sign_bits);
-        _mm_storeu_si128((__m128i *)(outptr + 4 * (i * 4)), temp1);
-        _mm_storeu_si128((__m128i *)(outptr + 4 * (i * 4 + 1)), temp2);
-        sign_bits = _mm_cmplt_epi16(inptr[i + 16], zero);
-        temp1 = _mm_unpacklo_epi16(inptr[i + 16], sign_bits);
-        temp2 = _mm_unpackhi_epi16(inptr[i + 16], sign_bits);
-        _mm_storeu_si128((__m128i *)(outptr + 4 * (i * 4 + 2)), temp1);
-        _mm_storeu_si128((__m128i *)(outptr + 4 * (i * 4 + 3)), temp2);
-      }
-    } else {
-      // Set to use the optimised transform for the column
-      optimised_cols = 1;
-    }
-  } else {
-    // Run the un-optimised row transform
-    for (i = 0; i < 16; ++i) {
-      vp9_highbd_idct16(input, outptr, bd);
-      input += 16;
-      outptr += 16;
-    }
-  }
-
-  if (optimised_cols) {
-    idct16_sse2(inptr, inptr + 16);
-
-    // Final round & shift and Reconstruction and Store
-    {
-      __m128i d[2];
-      for (i = 0; i < 16; i++) {
-        inptr[i   ] = _mm_add_epi16(inptr[i   ], rounding);
-        inptr[i+16] = _mm_add_epi16(inptr[i+16], rounding);
-        d[0] = _mm_loadu_si128((const __m128i *)(dest + stride*i));
-        d[1] = _mm_loadu_si128((const __m128i *)(dest + stride*i + 8));
-        inptr[i   ] = _mm_srai_epi16(inptr[i   ], 6);
-        inptr[i+16] = _mm_srai_epi16(inptr[i+16], 6);
-        d[0] = clamp_high_sse2(_mm_add_epi16(d[0], inptr[i   ]), bd);
-        d[1] = clamp_high_sse2(_mm_add_epi16(d[1], inptr[i+16]), bd);
-        // Store
-        _mm_storeu_si128((__m128i *)(dest + stride*i), d[0]);
-        _mm_storeu_si128((__m128i *)(dest + stride*i + 8), d[1]);
-      }
-    }
-  } else {
-    // Run the un-optimised column transform
-    tran_low_t temp_in[16], temp_out[16];
-    for (i = 0; i < 16; ++i) {
-      for (j = 0; j < 16; ++j)
-        temp_in[j] = out[j * 16 + i];
-      vp9_highbd_idct16(temp_in, temp_out, bd);
-      for (j = 0; j < 16; ++j) {
-        dest[j * stride + i] = highbd_clip_pixel_add(
-            dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 6), bd);
-      }
-    }
-  }
-}
-
-void vp9_highbd_idct16x16_10_add_sse2(const tran_low_t *input, uint8_t *dest8,
-                                      int stride, int bd) {
-  tran_low_t out[16 * 16] = { 0 };
-  tran_low_t *outptr = out;
-  int i, j, test;
-  __m128i inptr[32];
-  __m128i min_input, max_input, temp1, temp2, sign_bits;
-  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
-  const __m128i zero = _mm_set1_epi16(0);
-  const __m128i rounding = _mm_set1_epi16(32);
-  const __m128i max = _mm_set1_epi16(3155);
-  const __m128i min = _mm_set1_epi16(-3155);
-  int optimised_cols = 0;
-
-  // Load input into __m128i & pack to 16 bits
-  for (i = 0; i < 16; i++) {
-    temp1 = _mm_loadu_si128((const __m128i *)(input + 16 * i));
-    temp2 = _mm_loadu_si128((const __m128i *)(input + 16 * i + 4));
-    inptr[i] = _mm_packs_epi32(temp1, temp2);
-    temp1 = _mm_loadu_si128((const __m128i *)(input + 16 * i + 8));
-    temp2 = _mm_loadu_si128((const __m128i *)(input + 16 * i + 12));
-    inptr[i + 16] = _mm_packs_epi32(temp1, temp2);
-  }
-
-  // Find the min & max for the row transform
-  // Since all non-zero dct coefficients are in upper-left 4x4 area,
-  // we only need to consider first 4 rows here.
-  max_input = _mm_max_epi16(inptr[0], inptr[1]);
-  min_input = _mm_min_epi16(inptr[0], inptr[1]);
-  for (i = 2; i < 4; i++) {
-    max_input = _mm_max_epi16(max_input, inptr[i]);
-    min_input = _mm_min_epi16(min_input, inptr[i]);
-  }
-  max_input = _mm_cmpgt_epi16(max_input, max);
-  min_input = _mm_cmplt_epi16(min_input, min);
-  temp1 = _mm_or_si128(max_input, min_input);
-  test = _mm_movemask_epi8(temp1);
-
-  if (!test) {
-    // Do the row transform (N.B. This transposes inptr)
-    idct16_sse2(inptr, inptr + 16);
-
-    // Find the min & max for the column transform
-    // N.B. Only first 4 cols contain non-zero coeffs
-    max_input = _mm_max_epi16(inptr[0], inptr[1]);
-    min_input = _mm_min_epi16(inptr[0], inptr[1]);
-    for (i = 2; i < 16; i++) {
-      max_input = _mm_max_epi16(max_input, inptr[i]);
-      min_input = _mm_min_epi16(min_input, inptr[i]);
-    }
-    max_input = _mm_cmpgt_epi16(max_input, max);
-    min_input = _mm_cmplt_epi16(min_input, min);
-    temp1 = _mm_or_si128(max_input, min_input);
-    test = _mm_movemask_epi8(temp1);
-
-    if (test) {
-      // Use fact only first 4 rows contain non-zero coeffs
-      array_transpose_8x8(inptr, inptr);
-      array_transpose_8x8(inptr + 8, inptr + 16);
-      for (i = 0; i < 4; i++) {
-        sign_bits = _mm_cmplt_epi16(inptr[i], zero);
-        temp1 = _mm_unpacklo_epi16(inptr[i], sign_bits);
-        temp2 = _mm_unpackhi_epi16(inptr[i], sign_bits);
-        _mm_storeu_si128((__m128i *)(outptr + 4 * (i * 4)), temp1);
-        _mm_storeu_si128((__m128i *)(outptr + 4 * (i * 4 + 1)), temp2);
-        sign_bits = _mm_cmplt_epi16(inptr[i + 16], zero);
-        temp1 = _mm_unpacklo_epi16(inptr[i + 16], sign_bits);
-        temp2 = _mm_unpackhi_epi16(inptr[i + 16], sign_bits);
-        _mm_storeu_si128((__m128i *)(outptr + 4 * (i * 4 + 2)), temp1);
-        _mm_storeu_si128((__m128i *)(outptr + 4 * (i * 4 + 3)), temp2);
-      }
-    } else {
-      // Set to use the optimised transform for the column
-      optimised_cols = 1;
-    }
-  } else {
-    // Run the un-optimised row transform
-    for (i = 0; i < 4; ++i) {
-      vp9_highbd_idct16(input, outptr, bd);
-      input += 16;
-      outptr += 16;
-    }
-  }
-
-  if (optimised_cols) {
-    idct16_sse2(inptr, inptr + 16);
-
-    // Final round & shift and Reconstruction and Store
-    {
-      __m128i d[2];
-      for (i = 0; i < 16; i++) {
-        inptr[i   ] = _mm_add_epi16(inptr[i   ], rounding);
-        inptr[i+16] = _mm_add_epi16(inptr[i+16], rounding);
-        d[0] = _mm_loadu_si128((const __m128i *)(dest + stride*i));
-        d[1] = _mm_loadu_si128((const __m128i *)(dest + stride*i + 8));
-        inptr[i   ] = _mm_srai_epi16(inptr[i   ], 6);
-        inptr[i+16] = _mm_srai_epi16(inptr[i+16], 6);
-        d[0] = clamp_high_sse2(_mm_add_epi16(d[0], inptr[i   ]), bd);
-        d[1] = clamp_high_sse2(_mm_add_epi16(d[1], inptr[i+16]), bd);
-        // Store
-        _mm_storeu_si128((__m128i *)(dest + stride*i), d[0]);
-        _mm_storeu_si128((__m128i *)(dest + stride*i + 8), d[1]);
-      }
-    }
-  } else {
-    // Run the un-optimised column transform
-    tran_low_t temp_in[16], temp_out[16];
-    for (i = 0; i < 16; ++i) {
-      for (j = 0; j < 16; ++j)
-        temp_in[j] = out[j * 16 + i];
-      vp9_highbd_idct16(temp_in, temp_out, bd);
-      for (j = 0; j < 16; ++j) {
-        dest[j * stride + i] = highbd_clip_pixel_add(
-            dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 6), bd);
-      }
-    }
-  }
-}
-
-#endif  // CONFIG_VP9_HIGHBITDEPTH
diff --git a/vp9/encoder/x86/vp9_dct_ssse3.c b/vp9/encoder/x86/vp9_dct_ssse3.c
index 0e7d2a140..b09eac0d1 100644
--- a/vp9/encoder/x86/vp9_dct_ssse3.c
+++ b/vp9/encoder/x86/vp9_dct_ssse3.c
@@ -17,7 +17,7 @@
 #include <tmmintrin.h>  // SSSE3
 
 #include "./vp9_rtcd.h"
-#include "vp9/common/x86/vp9_idct_intrin_sse2.h"
+#include "vpx_dsp/x86/inv_txfm_sse2.h"
 #include "vpx_dsp/x86/txfm_common_sse2.h"
 
 void vp9_fdct8x8_quant_ssse3(const int16_t *input, int stride,
diff --git a/vp9/vp9_common.mk b/vp9/vp9_common.mk
index cc201bccd..159eea5f2 100644
--- a/vp9/vp9_common.mk
+++ b/vp9/vp9_common.mk
@@ -66,7 +66,6 @@ VP9_COMMON_SRCS-$(CONFIG_VP9_POSTPROC) += common/vp9_postproc.h
 VP9_COMMON_SRCS-$(CONFIG_VP9_POSTPROC) += common/vp9_postproc.c
 VP9_COMMON_SRCS-$(CONFIG_VP9_POSTPROC) += common/vp9_mfqe.h
 VP9_COMMON_SRCS-$(CONFIG_VP9_POSTPROC) += common/vp9_mfqe.c
-VP9_COMMON_SRCS-$(HAVE_SSE2) += common/x86/vp9_idct_sse2.asm
 ifeq ($(CONFIG_VP9_POSTPROC),yes)
 VP9_COMMON_SRCS-$(HAVE_SSE2) += common/x86/vp9_mfqe_sse2.asm
 VP9_COMMON_SRCS-$(HAVE_SSE2) += common/x86/vp9_postproc_sse2.asm
@@ -96,13 +95,6 @@ VP9_COMMON_SRCS-$(HAVE_MSA) += common/mips/msa/vp9_mfqe_msa.c
 endif
 
 VP9_COMMON_SRCS-$(HAVE_SSE2) += common/x86/vp9_idct_intrin_sse2.c
-VP9_COMMON_SRCS-$(HAVE_SSE2) += common/x86/vp9_idct_intrin_sse2.h
-
-ifeq ($(ARCH_X86_64), yes)
-ifeq ($(CONFIG_USE_X86INC),yes)
-VP9_COMMON_SRCS-$(HAVE_SSSE3) += common/x86/vp9_idct_ssse3_x86_64.asm
-endif
-endif
 
 VP9_COMMON_SRCS-$(HAVE_NEON_ASM) += common/arm/neon/vp9_save_reg_neon$(ASM)
 
@@ -111,30 +103,4 @@ VP9_COMMON_SRCS-$(HAVE_NEON) += common/arm/neon/vp9_iht4x4_add_neon.c
 VP9_COMMON_SRCS-$(HAVE_NEON) += common/arm/neon/vp9_iht8x8_add_neon.c
 endif
 
-# neon with assembly and intrinsics implementations. If both are available
-# prefer assembly.
-ifeq ($(HAVE_NEON_ASM), yes)
-VP9_COMMON_SRCS-yes += common/arm/neon/vp9_idct16x16_1_add_neon_asm$(ASM)
-VP9_COMMON_SRCS-yes += common/arm/neon/vp9_idct16x16_add_neon_asm$(ASM)
-VP9_COMMON_SRCS-yes += common/arm/neon/vp9_idct16x16_neon.c
-VP9_COMMON_SRCS-yes += common/arm/neon/vp9_idct32x32_1_add_neon_asm$(ASM)
-VP9_COMMON_SRCS-yes += common/arm/neon/vp9_idct32x32_add_neon_asm$(ASM)
-VP9_COMMON_SRCS-yes += common/arm/neon/vp9_idct4x4_1_add_neon_asm$(ASM)
-VP9_COMMON_SRCS-yes += common/arm/neon/vp9_idct4x4_add_neon_asm$(ASM)
-VP9_COMMON_SRCS-yes += common/arm/neon/vp9_idct8x8_1_add_neon_asm$(ASM)
-VP9_COMMON_SRCS-yes += common/arm/neon/vp9_idct8x8_add_neon_asm$(ASM)
-else
-ifeq ($(HAVE_NEON), yes)
-VP9_COMMON_SRCS-yes += common/arm/neon/vp9_idct16x16_1_add_neon.c
-VP9_COMMON_SRCS-yes += common/arm/neon/vp9_idct16x16_add_neon.c
-VP9_COMMON_SRCS-yes += common/arm/neon/vp9_idct16x16_neon.c
-VP9_COMMON_SRCS-yes += common/arm/neon/vp9_idct32x32_1_add_neon.c
-VP9_COMMON_SRCS-yes += common/arm/neon/vp9_idct32x32_add_neon.c
-VP9_COMMON_SRCS-yes += common/arm/neon/vp9_idct4x4_1_add_neon.c
-VP9_COMMON_SRCS-yes += common/arm/neon/vp9_idct4x4_add_neon.c
-VP9_COMMON_SRCS-yes += common/arm/neon/vp9_idct8x8_1_add_neon.c
-VP9_COMMON_SRCS-yes += common/arm/neon/vp9_idct8x8_add_neon.c
-endif  # HAVE_NEON
-endif  # HAVE_NEON_ASM
-
 $(eval $(call rtcd_h_template,vp9_rtcd,vp9/common/vp9_rtcd_defs.pl))
diff --git a/vp9/common/arm/neon/vp9_idct16x16_1_add_neon_asm.asm b/vpx_dsp/arm/idct16x16_1_add_neon.asm
index b1fd21bb6..b1fd21bb6 100644
--- a/vp9/common/arm/neon/vp9_idct16x16_1_add_neon_asm.asm
+++ b/vpx_dsp/arm/idct16x16_1_add_neon.asm
diff --git a/vp9/common/arm/neon/vp9_idct16x16_1_add_neon.c b/vpx_dsp/arm/idct16x16_1_add_neon.c
index 9b14be1c1..aa035e770 100644
--- a/vp9/common/arm/neon/vp9_idct16x16_1_add_neon.c
+++ b/vpx_dsp/arm/idct16x16_1_add_neon.c
@@ -10,7 +10,7 @@
 
 #include <arm_neon.h>
 
-#include "vp9/common/vp9_idct.h"
+#include "vpx_dsp/inv_txfm.h"
 #include "vpx_ports/mem.h"
 
 void vp9_idct16x16_1_add_neon(
diff --git a/vp9/common/arm/neon/vp9_idct16x16_add_neon_asm.asm b/vpx_dsp/arm/idct16x16_add_neon.asm
index a13c0d04b..a13c0d04b 100644
--- a/vp9/common/arm/neon/vp9_idct16x16_add_neon_asm.asm
+++ b/vpx_dsp/arm/idct16x16_add_neon.asm
diff --git a/vp9/common/arm/neon/vp9_idct16x16_add_neon.c b/vpx_dsp/arm/idct16x16_add_neon.c
index 545388ae6..545388ae6 100644
--- a/vp9/common/arm/neon/vp9_idct16x16_add_neon.c
+++ b/vpx_dsp/arm/idct16x16_add_neon.c
diff --git a/vp9/common/arm/neon/vp9_idct16x16_neon.c b/vpx_dsp/arm/idct16x16_neon.c
index f2c4ec451..ac9f348bc 100644
--- a/vp9/common/arm/neon/vp9_idct16x16_neon.c
+++ b/vpx_dsp/arm/idct16x16_neon.c
@@ -8,7 +8,6 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "./vp9_rtcd.h"
 #include "vp9/common/vp9_common.h"
 
 void vp9_idct16x16_256_add_neon_pass1(const int16_t *input,
diff --git a/vp9/common/arm/neon/vp9_idct32x32_1_add_neon_asm.asm b/vpx_dsp/arm/idct32x32_1_add_neon.asm
index d290d0753..d290d0753 100644
--- a/vp9/common/arm/neon/vp9_idct32x32_1_add_neon_asm.asm
+++ b/vpx_dsp/arm/idct32x32_1_add_neon.asm
diff --git a/vp9/common/arm/neon/vp9_idct32x32_1_add_neon.c b/vpx_dsp/arm/idct32x32_1_add_neon.c
index 702efa747..e9c9c30c2 100644
--- a/vp9/common/arm/neon/vp9_idct32x32_1_add_neon.c
+++ b/vpx_dsp/arm/idct32x32_1_add_neon.c
@@ -12,7 +12,7 @@
 
 #include "./vpx_config.h"
 
-#include "vp9/common/vp9_idct.h"
+#include "vpx_dsp/inv_txfm.h"
 #include "vpx_ports/mem.h"
 
 static INLINE void LD_16x8(
diff --git a/vp9/common/arm/neon/vp9_idct32x32_add_neon_asm.asm b/vpx_dsp/arm/idct32x32_add_neon.asm
index 72e933eee..72e933eee 100644
--- a/vp9/common/arm/neon/vp9_idct32x32_add_neon_asm.asm
+++ b/vpx_dsp/arm/idct32x32_add_neon.asm
diff --git a/vp9/common/arm/neon/vp9_idct32x32_add_neon.c b/vpx_dsp/arm/idct32x32_add_neon.c
index 3656a7696..3656a7696 100644
--- a/vp9/common/arm/neon/vp9_idct32x32_add_neon.c
+++ b/vpx_dsp/arm/idct32x32_add_neon.c
diff --git a/vp9/common/arm/neon/vp9_idct4x4_1_add_neon_asm.asm b/vpx_dsp/arm/idct4x4_1_add_neon.asm
index 0d4a721c4..0d4a721c4 100644
--- a/vp9/common/arm/neon/vp9_idct4x4_1_add_neon_asm.asm
+++ b/vpx_dsp/arm/idct4x4_1_add_neon.asm
diff --git a/vp9/common/arm/neon/vp9_idct4x4_1_add_neon.c b/vpx_dsp/arm/idct4x4_1_add_neon.c
index 0ff22d5d5..75e14ccde 100644
--- a/vp9/common/arm/neon/vp9_idct4x4_1_add_neon.c
+++ b/vpx_dsp/arm/idct4x4_1_add_neon.c
@@ -10,7 +10,7 @@
 
 #include <arm_neon.h>
 
-#include "vp9/common/vp9_idct.h"
+#include "vpx_dsp/inv_txfm.h"
 #include "vpx_ports/mem.h"
 
 void vp9_idct4x4_1_add_neon(
diff --git a/vp9/common/arm/neon/vp9_idct4x4_add_neon_asm.asm b/vpx_dsp/arm/idct4x4_add_neon.asm
index 00283fc8d..00283fc8d 100644
--- a/vp9/common/arm/neon/vp9_idct4x4_add_neon_asm.asm
+++ b/vpx_dsp/arm/idct4x4_add_neon.asm
diff --git a/vp9/common/arm/neon/vp9_idct4x4_add_neon.c b/vpx_dsp/arm/idct4x4_add_neon.c
index dc91e0f30..dc91e0f30 100644
--- a/vp9/common/arm/neon/vp9_idct4x4_add_neon.c
+++ b/vpx_dsp/arm/idct4x4_add_neon.c
diff --git a/vp9/common/arm/neon/vp9_idct8x8_1_add_neon_asm.asm b/vpx_dsp/arm/idct8x8_1_add_neon.asm
index 421d202d4..421d202d4 100644
--- a/vp9/common/arm/neon/vp9_idct8x8_1_add_neon_asm.asm
+++ b/vpx_dsp/arm/idct8x8_1_add_neon.asm
diff --git a/vp9/common/arm/neon/vp9_idct8x8_1_add_neon.c b/vpx_dsp/arm/idct8x8_1_add_neon.c
index 4178d349d..10e8e931e 100644
--- a/vp9/common/arm/neon/vp9_idct8x8_1_add_neon.c
+++ b/vpx_dsp/arm/idct8x8_1_add_neon.c
@@ -10,7 +10,7 @@
 
 #include <arm_neon.h>
 
-#include "vp9/common/vp9_idct.h"
+#include "vpx_dsp/inv_txfm.h"
 #include "vpx_ports/mem.h"
 
 void vp9_idct8x8_1_add_neon(
diff --git a/vp9/common/arm/neon/vp9_idct8x8_add_neon_asm.asm b/vpx_dsp/arm/idct8x8_add_neon.asm
index ab5bb6920..ab5bb6920 100644
--- a/vp9/common/arm/neon/vp9_idct8x8_add_neon_asm.asm
+++ b/vpx_dsp/arm/idct8x8_add_neon.asm
diff --git a/vp9/common/arm/neon/vp9_idct8x8_add_neon.c b/vpx_dsp/arm/idct8x8_add_neon.c
index ea3ce4943..ea3ce4943 100644
--- a/vp9/common/arm/neon/vp9_idct8x8_add_neon.c
+++ b/vpx_dsp/arm/idct8x8_add_neon.c
diff --git a/vpx_dsp/inv_txfm.c b/vpx_dsp/inv_txfm.c
new file mode 100644
index 000000000..6babf54d0
--- /dev/null
+++ b/vpx_dsp/inv_txfm.c
@@ -0,0 +1,2476 @@
+/*
+ *  Copyright (c) 2015 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <math.h>
+#include <string.h>
+
+#include "vpx_dsp/inv_txfm.h"
+
+void vp9_iwht4x4_16_add_c(const tran_low_t *input, uint8_t *dest, int stride) {
+/* 4-point reversible, orthonormal inverse Walsh-Hadamard in 3.5 adds,
+   0.5 shifts per pixel. */
+  int i;
+  tran_low_t output[16];
+  tran_high_t a1, b1, c1, d1, e1;
+  const tran_low_t *ip = input;
+  tran_low_t *op = output;
+
+  for (i = 0; i < 4; i++) {
+    a1 = ip[0] >> UNIT_QUANT_SHIFT;
+    c1 = ip[1] >> UNIT_QUANT_SHIFT;
+    d1 = ip[2] >> UNIT_QUANT_SHIFT;
+    b1 = ip[3] >> UNIT_QUANT_SHIFT;
+    a1 += c1;
+    d1 -= b1;
+    e1 = (a1 - d1) >> 1;
+    b1 = e1 - b1;
+    c1 = e1 - c1;
+    a1 -= b1;
+    d1 += c1;
+    op[0] = WRAPLOW(a1, 8);
+    op[1] = WRAPLOW(b1, 8);
+    op[2] = WRAPLOW(c1, 8);
+    op[3] = WRAPLOW(d1, 8);
+    ip += 4;
+    op += 4;
+  }
+
+  ip = output;
+  for (i = 0; i < 4; i++) {
+    a1 = ip[4 * 0];
+    c1 = ip[4 * 1];
+    d1 = ip[4 * 2];
+    b1 = ip[4 * 3];
+    a1 += c1;
+    d1 -= b1;
+    e1 = (a1 - d1) >> 1;
+    b1 = e1 - b1;
+    c1 = e1 - c1;
+    a1 -= b1;
+    d1 += c1;
+    dest[stride * 0] = clip_pixel_add(dest[stride * 0], a1);
+    dest[stride * 1] = clip_pixel_add(dest[stride * 1], b1);
+    dest[stride * 2] = clip_pixel_add(dest[stride * 2], c1);
+    dest[stride * 3] = clip_pixel_add(dest[stride * 3], d1);
+
+    ip++;
+    dest++;
+  }
+}
+
+void vp9_iwht4x4_1_add_c(const tran_low_t *in, uint8_t *dest, int dest_stride) {
+  int i;
+  tran_high_t a1, e1;
+  tran_low_t tmp[4];
+  const tran_low_t *ip = in;
+  tran_low_t *op = tmp;
+
+  a1 = ip[0] >> UNIT_QUANT_SHIFT;
+  e1 = a1 >> 1;
+  a1 -= e1;
+  op[0] = WRAPLOW(a1, 8);
+  op[1] = op[2] = op[3] = WRAPLOW(e1, 8);
+
+  ip = tmp;
+  for (i = 0; i < 4; i++) {
+    e1 = ip[0] >> 1;
+    a1 = ip[0] - e1;
+    dest[dest_stride * 0] = clip_pixel_add(dest[dest_stride * 0], a1);
+    dest[dest_stride * 1] = clip_pixel_add(dest[dest_stride * 1], e1);
+    dest[dest_stride * 2] = clip_pixel_add(dest[dest_stride * 2], e1);
+    dest[dest_stride * 3] = clip_pixel_add(dest[dest_stride * 3], e1);
+    ip++;
+    dest++;
+  }
+}
+
+void idct4_c(const tran_low_t *input, tran_low_t *output) {
+  tran_low_t step[4];
+  tran_high_t temp1, temp2;
+  // stage 1
+  temp1 = (input[0] + input[2]) * cospi_16_64;
+  temp2 = (input[0] - input[2]) * cospi_16_64;
+  step[0] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step[1] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  temp1 = input[1] * cospi_24_64 - input[3] * cospi_8_64;
+  temp2 = input[1] * cospi_8_64 + input[3] * cospi_24_64;
+  step[2] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step[3] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  // stage 2
+  output[0] = WRAPLOW(step[0] + step[3], 8);
+  output[1] = WRAPLOW(step[1] + step[2], 8);
+  output[2] = WRAPLOW(step[1] - step[2], 8);
+  output[3] = WRAPLOW(step[0] - step[3], 8);
+}
+
+void vp9_idct4x4_16_add_c(const tran_low_t *input, uint8_t *dest, int stride) {
+  tran_low_t out[4 * 4];
+  tran_low_t *outptr = out;
+  int i, j;
+  tran_low_t temp_in[4], temp_out[4];
+
+  // Rows
+  for (i = 0; i < 4; ++i) {
+    idct4_c(input, outptr);
+    input += 4;
+    outptr += 4;
+  }
+
+  // Columns
+  for (i = 0; i < 4; ++i) {
+    for (j = 0; j < 4; ++j)
+      temp_in[j] = out[j * 4 + i];
+    idct4_c(temp_in, temp_out);
+    for (j = 0; j < 4; ++j) {
+      dest[j * stride + i] = clip_pixel_add(dest[j * stride + i],
+                                            ROUND_POWER_OF_TWO(temp_out[j], 4));
+    }
+  }
+}
+
+void vp9_idct4x4_1_add_c(const tran_low_t *input, uint8_t *dest,
+                         int dest_stride) {
+  int i;
+  tran_high_t a1;
+  tran_low_t out = WRAPLOW(dct_const_round_shift(input[0] * cospi_16_64), 8);
+  out = WRAPLOW(dct_const_round_shift(out * cospi_16_64), 8);
+  a1 = ROUND_POWER_OF_TWO(out, 4);
+
+  for (i = 0; i < 4; i++) {
+    dest[0] = clip_pixel_add(dest[0], a1);
+    dest[1] = clip_pixel_add(dest[1], a1);
+    dest[2] = clip_pixel_add(dest[2], a1);
+    dest[3] = clip_pixel_add(dest[3], a1);
+    dest += dest_stride;
+  }
+}
+
+void idct8_c(const tran_low_t *input, tran_low_t *output) {
+  tran_low_t step1[8], step2[8];
+  tran_high_t temp1, temp2;
+  // stage 1
+  step1[0] = input[0];
+  step1[2] = input[4];
+  step1[1] = input[2];
+  step1[3] = input[6];
+  temp1 = input[1] * cospi_28_64 - input[7] * cospi_4_64;
+  temp2 = input[1] * cospi_4_64 + input[7] * cospi_28_64;
+  step1[4] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[7] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  temp1 = input[5] * cospi_12_64 - input[3] * cospi_20_64;
+  temp2 = input[5] * cospi_20_64 + input[3] * cospi_12_64;
+  step1[5] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[6] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  // stage 2 & stage 3 - even half
+  idct4_c(step1, step1);
+
+  // stage 2 - odd half
+  step2[4] = WRAPLOW(step1[4] + step1[5], 8);
+  step2[5] = WRAPLOW(step1[4] - step1[5], 8);
+  step2[6] = WRAPLOW(-step1[6] + step1[7], 8);
+  step2[7] = WRAPLOW(step1[6] + step1[7], 8);
+
+  // stage 3 -odd half
+  step1[4] = step2[4];
+  temp1 = (step2[6] - step2[5]) * cospi_16_64;
+  temp2 = (step2[5] + step2[6]) * cospi_16_64;
+  step1[5] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[6] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  step1[7] = step2[7];
+
+  // stage 4
+  output[0] = WRAPLOW(step1[0] + step1[7], 8);
+  output[1] = WRAPLOW(step1[1] + step1[6], 8);
+  output[2] = WRAPLOW(step1[2] + step1[5], 8);
+  output[3] = WRAPLOW(step1[3] + step1[4], 8);
+  output[4] = WRAPLOW(step1[3] - step1[4], 8);
+  output[5] = WRAPLOW(step1[2] - step1[5], 8);
+  output[6] = WRAPLOW(step1[1] - step1[6], 8);
+  output[7] = WRAPLOW(step1[0] - step1[7], 8);
+}
+
+void vp9_idct8x8_64_add_c(const tran_low_t *input, uint8_t *dest, int stride) {
+  tran_low_t out[8 * 8];
+  tran_low_t *outptr = out;
+  int i, j;
+  tran_low_t temp_in[8], temp_out[8];
+
+  // First transform rows
+  for (i = 0; i < 8; ++i) {
+    idct8_c(input, outptr);
+    input += 8;
+    outptr += 8;
+  }
+
+  // Then transform columns
+  for (i = 0; i < 8; ++i) {
+    for (j = 0; j < 8; ++j)
+      temp_in[j] = out[j * 8 + i];
+    idct8_c(temp_in, temp_out);
+    for (j = 0; j < 8; ++j) {
+      dest[j * stride + i] = clip_pixel_add(dest[j * stride + i],
+                                            ROUND_POWER_OF_TWO(temp_out[j], 5));
+    }
+  }
+}
+
+void vp9_idct8x8_1_add_c(const tran_low_t *input, uint8_t *dest, int stride) {
+  int i, j;
+  tran_high_t a1;
+  tran_low_t out = WRAPLOW(dct_const_round_shift(input[0] * cospi_16_64), 8);
+  out = WRAPLOW(dct_const_round_shift(out * cospi_16_64), 8);
+  a1 = ROUND_POWER_OF_TWO(out, 5);
+  for (j = 0; j < 8; ++j) {
+    for (i = 0; i < 8; ++i)
+      dest[i] = clip_pixel_add(dest[i], a1);
+    dest += stride;
+  }
+}
+
+void iadst4_c(const tran_low_t *input, tran_low_t *output) {
+  tran_high_t s0, s1, s2, s3, s4, s5, s6, s7;
+
+  tran_low_t x0 = input[0];
+  tran_low_t x1 = input[1];
+  tran_low_t x2 = input[2];
+  tran_low_t x3 = input[3];
+
+  if (!(x0 | x1 | x2 | x3)) {
+    output[0] = output[1] = output[2] = output[3] = 0;
+    return;
+  }
+
+  s0 = sinpi_1_9 * x0;
+  s1 = sinpi_2_9 * x0;
+  s2 = sinpi_3_9 * x1;
+  s3 = sinpi_4_9 * x2;
+  s4 = sinpi_1_9 * x2;
+  s5 = sinpi_2_9 * x3;
+  s6 = sinpi_4_9 * x3;
+  s7 = x0 - x2 + x3;
+
+  s0 = s0 + s3 + s5;
+  s1 = s1 - s4 - s6;
+  s3 = s2;
+  s2 = sinpi_3_9 * s7;
+
+  // 1-D transform scaling factor is sqrt(2).
+  // The overall dynamic range is 14b (input) + 14b (multiplication scaling)
+  // + 1b (addition) = 29b.
+  // Hence the output bit depth is 15b.
+  output[0] = WRAPLOW(dct_const_round_shift(s0 + s3), 8);
+  output[1] = WRAPLOW(dct_const_round_shift(s1 + s3), 8);
+  output[2] = WRAPLOW(dct_const_round_shift(s2), 8);
+  output[3] = WRAPLOW(dct_const_round_shift(s0 + s1 - s3), 8);
+}
+
+void iadst8_c(const tran_low_t *input, tran_low_t *output) {
+  int s0, s1, s2, s3, s4, s5, s6, s7;
+
+  tran_high_t x0 = input[7];
+  tran_high_t x1 = input[0];
+  tran_high_t x2 = input[5];
+  tran_high_t x3 = input[2];
+  tran_high_t x4 = input[3];
+  tran_high_t x5 = input[4];
+  tran_high_t x6 = input[1];
+  tran_high_t x7 = input[6];
+
+  if (!(x0 | x1 | x2 | x3 | x4 | x5 | x6 | x7)) {
+    output[0] = output[1] = output[2] = output[3] = output[4]
+              = output[5] = output[6] = output[7] = 0;
+    return;
+  }
+
+  // stage 1
+  s0 = (int)(cospi_2_64  * x0 + cospi_30_64 * x1);
+  s1 = (int)(cospi_30_64 * x0 - cospi_2_64  * x1);
+  s2 = (int)(cospi_10_64 * x2 + cospi_22_64 * x3);
+  s3 = (int)(cospi_22_64 * x2 - cospi_10_64 * x3);
+  s4 = (int)(cospi_18_64 * x4 + cospi_14_64 * x5);
+  s5 = (int)(cospi_14_64 * x4 - cospi_18_64 * x5);
+  s6 = (int)(cospi_26_64 * x6 + cospi_6_64  * x7);
+  s7 = (int)(cospi_6_64  * x6 - cospi_26_64 * x7);
+
+  x0 = WRAPLOW(dct_const_round_shift(s0 + s4), 8);
+  x1 = WRAPLOW(dct_const_round_shift(s1 + s5), 8);
+  x2 = WRAPLOW(dct_const_round_shift(s2 + s6), 8);
+  x3 = WRAPLOW(dct_const_round_shift(s3 + s7), 8);
+  x4 = WRAPLOW(dct_const_round_shift(s0 - s4), 8);
+  x5 = WRAPLOW(dct_const_round_shift(s1 - s5), 8);
+  x6 = WRAPLOW(dct_const_round_shift(s2 - s6), 8);
+  x7 = WRAPLOW(dct_const_round_shift(s3 - s7), 8);
+
+  // stage 2
+  s0 = (int)x0;
+  s1 = (int)x1;
+  s2 = (int)x2;
+  s3 = (int)x3;
+  s4 = (int)(cospi_8_64 * x4 + cospi_24_64 * x5);
+  s5 = (int)(cospi_24_64 * x4 - cospi_8_64 * x5);
+  s6 = (int)(-cospi_24_64 * x6 + cospi_8_64 * x7);
+  s7 = (int)(cospi_8_64 * x6 + cospi_24_64 * x7);
+
+  x0 = WRAPLOW(s0 + s2, 8);
+  x1 = WRAPLOW(s1 + s3, 8);
+  x2 = WRAPLOW(s0 - s2, 8);
+  x3 = WRAPLOW(s1 - s3, 8);
+  x4 = WRAPLOW(dct_const_round_shift(s4 + s6), 8);
+  x5 = WRAPLOW(dct_const_round_shift(s5 + s7), 8);
+  x6 = WRAPLOW(dct_const_round_shift(s4 - s6), 8);
+  x7 = WRAPLOW(dct_const_round_shift(s5 - s7), 8);
+
+  // stage 3
+  s2 = (int)(cospi_16_64 * (x2 + x3));
+  s3 = (int)(cospi_16_64 * (x2 - x3));
+  s6 = (int)(cospi_16_64 * (x6 + x7));
+  s7 = (int)(cospi_16_64 * (x6 - x7));
+
+  x2 = WRAPLOW(dct_const_round_shift(s2), 8);
+  x3 = WRAPLOW(dct_const_round_shift(s3), 8);
+  x6 = WRAPLOW(dct_const_round_shift(s6), 8);
+  x7 = WRAPLOW(dct_const_round_shift(s7), 8);
+
+  output[0] = WRAPLOW(x0, 8);
+  output[1] = WRAPLOW(-x4, 8);
+  output[2] = WRAPLOW(x6, 8);
+  output[3] = WRAPLOW(-x2, 8);
+  output[4] = WRAPLOW(x3, 8);
+  output[5] = WRAPLOW(-x7, 8);
+  output[6] = WRAPLOW(x5, 8);
+  output[7] = WRAPLOW(-x1, 8);
+}
+
+void vp9_idct8x8_12_add_c(const tran_low_t *input, uint8_t *dest, int stride) {
+  tran_low_t out[8 * 8] = { 0 };
+  tran_low_t *outptr = out;
+  int i, j;
+  tran_low_t temp_in[8], temp_out[8];
+
+  // First transform rows
+  // only first 4 row has non-zero coefs
+  for (i = 0; i < 4; ++i) {
+    idct8_c(input, outptr);
+    input += 8;
+    outptr += 8;
+  }
+
+  // Then transform columns
+  for (i = 0; i < 8; ++i) {
+    for (j = 0; j < 8; ++j)
+      temp_in[j] = out[j * 8 + i];
+    idct8_c(temp_in, temp_out);
+    for (j = 0; j < 8; ++j) {
+      dest[j * stride + i] = clip_pixel_add(dest[j * stride + i],
+                                            ROUND_POWER_OF_TWO(temp_out[j], 5));
+    }
+  }
+}
+
+void idct16_c(const tran_low_t *input, tran_low_t *output) {
+  tran_low_t step1[16], step2[16];
+  tran_high_t temp1, temp2;
+
+  // stage 1
+  step1[0] = input[0/2];
+  step1[1] = input[16/2];
+  step1[2] = input[8/2];
+  step1[3] = input[24/2];
+  step1[4] = input[4/2];
+  step1[5] = input[20/2];
+  step1[6] = input[12/2];
+  step1[7] = input[28/2];
+  step1[8] = input[2/2];
+  step1[9] = input[18/2];
+  step1[10] = input[10/2];
+  step1[11] = input[26/2];
+  step1[12] = input[6/2];
+  step1[13] = input[22/2];
+  step1[14] = input[14/2];
+  step1[15] = input[30/2];
+
+  // stage 2
+  step2[0] = step1[0];
+  step2[1] = step1[1];
+  step2[2] = step1[2];
+  step2[3] = step1[3];
+  step2[4] = step1[4];
+  step2[5] = step1[5];
+  step2[6] = step1[6];
+  step2[7] = step1[7];
+
+  temp1 = step1[8] * cospi_30_64 - step1[15] * cospi_2_64;
+  temp2 = step1[8] * cospi_2_64 + step1[15] * cospi_30_64;
+  step2[8] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[15] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  temp1 = step1[9] * cospi_14_64 - step1[14] * cospi_18_64;
+  temp2 = step1[9] * cospi_18_64 + step1[14] * cospi_14_64;
+  step2[9] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[14] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  temp1 = step1[10] * cospi_22_64 - step1[13] * cospi_10_64;
+  temp2 = step1[10] * cospi_10_64 + step1[13] * cospi_22_64;
+  step2[10] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[13] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  temp1 = step1[11] * cospi_6_64 - step1[12] * cospi_26_64;
+  temp2 = step1[11] * cospi_26_64 + step1[12] * cospi_6_64;
+  step2[11] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[12] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  // stage 3
+  step1[0] = step2[0];
+  step1[1] = step2[1];
+  step1[2] = step2[2];
+  step1[3] = step2[3];
+
+  temp1 = step2[4] * cospi_28_64 - step2[7] * cospi_4_64;
+  temp2 = step2[4] * cospi_4_64 + step2[7] * cospi_28_64;
+  step1[4] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[7] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  temp1 = step2[5] * cospi_12_64 - step2[6] * cospi_20_64;
+  temp2 = step2[5] * cospi_20_64 + step2[6] * cospi_12_64;
+  step1[5] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[6] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  step1[8] = WRAPLOW(step2[8] + step2[9], 8);
+  step1[9] = WRAPLOW(step2[8] - step2[9], 8);
+  step1[10] = WRAPLOW(-step2[10] + step2[11], 8);
+  step1[11] = WRAPLOW(step2[10] + step2[11], 8);
+  step1[12] = WRAPLOW(step2[12] + step2[13], 8);
+  step1[13] = WRAPLOW(step2[12] - step2[13], 8);
+  step1[14] = WRAPLOW(-step2[14] + step2[15], 8);
+  step1[15] = WRAPLOW(step2[14] + step2[15], 8);
+
+  // stage 4
+  temp1 = (step1[0] + step1[1]) * cospi_16_64;
+  temp2 = (step1[0] - step1[1]) * cospi_16_64;
+  step2[0] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[1] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  temp1 = step1[2] * cospi_24_64 - step1[3] * cospi_8_64;
+  temp2 = step1[2] * cospi_8_64 + step1[3] * cospi_24_64;
+  step2[2] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[3] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  step2[4] = WRAPLOW(step1[4] + step1[5], 8);
+  step2[5] = WRAPLOW(step1[4] - step1[5], 8);
+  step2[6] = WRAPLOW(-step1[6] + step1[7], 8);
+  step2[7] = WRAPLOW(step1[6] + step1[7], 8);
+
+  step2[8] = step1[8];
+  step2[15] = step1[15];
+  temp1 = -step1[9] * cospi_8_64 + step1[14] * cospi_24_64;
+  temp2 = step1[9] * cospi_24_64 + step1[14] * cospi_8_64;
+  step2[9] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[14] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  temp1 = -step1[10] * cospi_24_64 - step1[13] * cospi_8_64;
+  temp2 = -step1[10] * cospi_8_64 + step1[13] * cospi_24_64;
+  step2[10] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[13] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  step2[11] = step1[11];
+  step2[12] = step1[12];
+
+  // stage 5
+  step1[0] = WRAPLOW(step2[0] + step2[3], 8);
+  step1[1] = WRAPLOW(step2[1] + step2[2], 8);
+  step1[2] = WRAPLOW(step2[1] - step2[2], 8);
+  step1[3] = WRAPLOW(step2[0] - step2[3], 8);
+  step1[4] = step2[4];
+  temp1 = (step2[6] - step2[5]) * cospi_16_64;
+  temp2 = (step2[5] + step2[6]) * cospi_16_64;
+  step1[5] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[6] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  step1[7] = step2[7];
+
+  step1[8] = WRAPLOW(step2[8] + step2[11], 8);
+  step1[9] = WRAPLOW(step2[9] + step2[10], 8);
+  step1[10] = WRAPLOW(step2[9] - step2[10], 8);
+  step1[11] = WRAPLOW(step2[8] - step2[11], 8);
+  step1[12] = WRAPLOW(-step2[12] + step2[15], 8);
+  step1[13] = WRAPLOW(-step2[13] + step2[14], 8);
+  step1[14] = WRAPLOW(step2[13] + step2[14], 8);
+  step1[15] = WRAPLOW(step2[12] + step2[15], 8);
+
+  // stage 6
+  step2[0] = WRAPLOW(step1[0] + step1[7], 8);
+  step2[1] = WRAPLOW(step1[1] + step1[6], 8);
+  step2[2] = WRAPLOW(step1[2] + step1[5], 8);
+  step2[3] = WRAPLOW(step1[3] + step1[4], 8);
+  step2[4] = WRAPLOW(step1[3] - step1[4], 8);
+  step2[5] = WRAPLOW(step1[2] - step1[5], 8);
+  step2[6] = WRAPLOW(step1[1] - step1[6], 8);
+  step2[7] = WRAPLOW(step1[0] - step1[7], 8);
+  step2[8] = step1[8];
+  step2[9] = step1[9];
+  temp1 = (-step1[10] + step1[13]) * cospi_16_64;
+  temp2 = (step1[10] + step1[13]) * cospi_16_64;
+  step2[10] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[13] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  temp1 = (-step1[11] + step1[12]) * cospi_16_64;
+  temp2 = (step1[11] + step1[12]) * cospi_16_64;
+  step2[11] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[12] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  step2[14] = step1[14];
+  step2[15] = step1[15];
+
+  // stage 7
+  output[0] = WRAPLOW(step2[0] + step2[15], 8);
+  output[1] = WRAPLOW(step2[1] + step2[14], 8);
+  output[2] = WRAPLOW(step2[2] + step2[13], 8);
+  output[3] = WRAPLOW(step2[3] + step2[12], 8);
+  output[4] = WRAPLOW(step2[4] + step2[11], 8);
+  output[5] = WRAPLOW(step2[5] + step2[10], 8);
+  output[6] = WRAPLOW(step2[6] + step2[9], 8);
+  output[7] = WRAPLOW(step2[7] + step2[8], 8);
+  output[8] = WRAPLOW(step2[7] - step2[8], 8);
+  output[9] = WRAPLOW(step2[6] - step2[9], 8);
+  output[10] = WRAPLOW(step2[5] - step2[10], 8);
+  output[11] = WRAPLOW(step2[4] - step2[11], 8);
+  output[12] = WRAPLOW(step2[3] - step2[12], 8);
+  output[13] = WRAPLOW(step2[2] - step2[13], 8);
+  output[14] = WRAPLOW(step2[1] - step2[14], 8);
+  output[15] = WRAPLOW(step2[0] - step2[15], 8);
+}
+
+void vp9_idct16x16_256_add_c(const tran_low_t *input, uint8_t *dest,
+                             int stride) {
+  tran_low_t out[16 * 16];
+  tran_low_t *outptr = out;
+  int i, j;
+  tran_low_t temp_in[16], temp_out[16];
+
+  // First transform rows
+  for (i = 0; i < 16; ++i) {
+    idct16_c(input, outptr);
+    input += 16;
+    outptr += 16;
+  }
+
+  // Then transform columns
+  for (i = 0; i < 16; ++i) {
+    for (j = 0; j < 16; ++j)
+      temp_in[j] = out[j * 16 + i];
+    idct16_c(temp_in, temp_out);
+    for (j = 0; j < 16; ++j) {
+      dest[j * stride + i] = clip_pixel_add(dest[j * stride + i],
+                                            ROUND_POWER_OF_TWO(temp_out[j], 6));
+    }
+  }
+}
+
+void iadst16_c(const tran_low_t *input, tran_low_t *output) {
+  tran_high_t s0, s1, s2, s3, s4, s5, s6, s7, s8;
+  tran_high_t s9, s10, s11, s12, s13, s14, s15;
+
+  tran_high_t x0 = input[15];
+  tran_high_t x1 = input[0];
+  tran_high_t x2 = input[13];
+  tran_high_t x3 = input[2];
+  tran_high_t x4 = input[11];
+  tran_high_t x5 = input[4];
+  tran_high_t x6 = input[9];
+  tran_high_t x7 = input[6];
+  tran_high_t x8 = input[7];
+  tran_high_t x9 = input[8];
+  tran_high_t x10 = input[5];
+  tran_high_t x11 = input[10];
+  tran_high_t x12 = input[3];
+  tran_high_t x13 = input[12];
+  tran_high_t x14 = input[1];
+  tran_high_t x15 = input[14];
+
+  if (!(x0 | x1 | x2 | x3 | x4 | x5 | x6 | x7 | x8
+           | x9 | x10 | x11 | x12 | x13 | x14 | x15)) {
+    output[0] = output[1] = output[2] = output[3] = output[4]
+              = output[5] = output[6] = output[7] = output[8]
+              = output[9] = output[10] = output[11] = output[12]
+              = output[13] = output[14] = output[15] = 0;
+    return;
+  }
+
+  // stage 1
+  s0 = x0 * cospi_1_64  + x1 * cospi_31_64;
+  s1 = x0 * cospi_31_64 - x1 * cospi_1_64;
+  s2 = x2 * cospi_5_64  + x3 * cospi_27_64;
+  s3 = x2 * cospi_27_64 - x3 * cospi_5_64;
+  s4 = x4 * cospi_9_64  + x5 * cospi_23_64;
+  s5 = x4 * cospi_23_64 - x5 * cospi_9_64;
+  s6 = x6 * cospi_13_64 + x7 * cospi_19_64;
+  s7 = x6 * cospi_19_64 - x7 * cospi_13_64;
+  s8 = x8 * cospi_17_64 + x9 * cospi_15_64;
+  s9 = x8 * cospi_15_64 - x9 * cospi_17_64;
+  s10 = x10 * cospi_21_64 + x11 * cospi_11_64;
+  s11 = x10 * cospi_11_64 - x11 * cospi_21_64;
+  s12 = x12 * cospi_25_64 + x13 * cospi_7_64;
+  s13 = x12 * cospi_7_64  - x13 * cospi_25_64;
+  s14 = x14 * cospi_29_64 + x15 * cospi_3_64;
+  s15 = x14 * cospi_3_64  - x15 * cospi_29_64;
+
+  x0 = WRAPLOW(dct_const_round_shift(s0 + s8), 8);
+  x1 = WRAPLOW(dct_const_round_shift(s1 + s9), 8);
+  x2 = WRAPLOW(dct_const_round_shift(s2 + s10), 8);
+  x3 = WRAPLOW(dct_const_round_shift(s3 + s11), 8);
+  x4 = WRAPLOW(dct_const_round_shift(s4 + s12), 8);
+  x5 = WRAPLOW(dct_const_round_shift(s5 + s13), 8);
+  x6 = WRAPLOW(dct_const_round_shift(s6 + s14), 8);
+  x7 = WRAPLOW(dct_const_round_shift(s7 + s15), 8);
+  x8 = WRAPLOW(dct_const_round_shift(s0 - s8), 8);
+  x9 = WRAPLOW(dct_const_round_shift(s1 - s9), 8);
+  x10 = WRAPLOW(dct_const_round_shift(s2 - s10), 8);
+  x11 = WRAPLOW(dct_const_round_shift(s3 - s11), 8);
+  x12 = WRAPLOW(dct_const_round_shift(s4 - s12), 8);
+  x13 = WRAPLOW(dct_const_round_shift(s5 - s13), 8);
+  x14 = WRAPLOW(dct_const_round_shift(s6 - s14), 8);
+  x15 = WRAPLOW(dct_const_round_shift(s7 - s15), 8);
+
+  // stage 2
+  s0 = x0;
+  s1 = x1;
+  s2 = x2;
+  s3 = x3;
+  s4 = x4;
+  s5 = x5;
+  s6 = x6;
+  s7 = x7;
+  s8 =    x8 * cospi_4_64   + x9 * cospi_28_64;
+  s9 =    x8 * cospi_28_64  - x9 * cospi_4_64;
+  s10 =   x10 * cospi_20_64 + x11 * cospi_12_64;
+  s11 =   x10 * cospi_12_64 - x11 * cospi_20_64;
+  s12 = - x12 * cospi_28_64 + x13 * cospi_4_64;
+  s13 =   x12 * cospi_4_64  + x13 * cospi_28_64;
+  s14 = - x14 * cospi_12_64 + x15 * cospi_20_64;
+  s15 =   x14 * cospi_20_64 + x15 * cospi_12_64;
+
+  x0 = WRAPLOW(s0 + s4, 8);
+  x1 = WRAPLOW(s1 + s5, 8);
+  x2 = WRAPLOW(s2 + s6, 8);
+  x3 = WRAPLOW(s3 + s7, 8);
+  x4 = WRAPLOW(s0 - s4, 8);
+  x5 = WRAPLOW(s1 - s5, 8);
+  x6 = WRAPLOW(s2 - s6, 8);
+  x7 = WRAPLOW(s3 - s7, 8);
+  x8 = WRAPLOW(dct_const_round_shift(s8 + s12), 8);
+  x9 = WRAPLOW(dct_const_round_shift(s9 + s13), 8);
+  x10 = WRAPLOW(dct_const_round_shift(s10 + s14), 8);
+  x11 = WRAPLOW(dct_const_round_shift(s11 + s15), 8);
+  x12 = WRAPLOW(dct_const_round_shift(s8 - s12), 8);
+  x13 = WRAPLOW(dct_const_round_shift(s9 - s13), 8);
+  x14 = WRAPLOW(dct_const_round_shift(s10 - s14), 8);
+  x15 = WRAPLOW(dct_const_round_shift(s11 - s15), 8);
+
+  // stage 3
+  s0 = x0;
+  s1 = x1;
+  s2 = x2;
+  s3 = x3;
+  s4 = x4 * cospi_8_64  + x5 * cospi_24_64;
+  s5 = x4 * cospi_24_64 - x5 * cospi_8_64;
+  s6 = - x6 * cospi_24_64 + x7 * cospi_8_64;
+  s7 =   x6 * cospi_8_64  + x7 * cospi_24_64;
+  s8 = x8;
+  s9 = x9;
+  s10 = x10;
+  s11 = x11;
+  s12 = x12 * cospi_8_64  + x13 * cospi_24_64;
+  s13 = x12 * cospi_24_64 - x13 * cospi_8_64;
+  s14 = - x14 * cospi_24_64 + x15 * cospi_8_64;
+  s15 =   x14 * cospi_8_64  + x15 * cospi_24_64;
+
+  x0 = WRAPLOW(check_range(s0 + s2), 8);
+  x1 = WRAPLOW(check_range(s1 + s3), 8);
+  x2 = WRAPLOW(check_range(s0 - s2), 8);
+  x3 = WRAPLOW(check_range(s1 - s3), 8);
+  x4 = WRAPLOW(dct_const_round_shift(s4 + s6), 8);
+  x5 = WRAPLOW(dct_const_round_shift(s5 + s7), 8);
+  x6 = WRAPLOW(dct_const_round_shift(s4 - s6), 8);
+  x7 = WRAPLOW(dct_const_round_shift(s5 - s7), 8);
+  x8 = WRAPLOW(check_range(s8 + s10), 8);
+  x9 = WRAPLOW(check_range(s9 + s11), 8);
+  x10 = WRAPLOW(check_range(s8 - s10), 8);
+  x11 = WRAPLOW(check_range(s9 - s11), 8);
+  x12 = WRAPLOW(dct_const_round_shift(s12 + s14), 8);
+  x13 = WRAPLOW(dct_const_round_shift(s13 + s15), 8);
+  x14 = WRAPLOW(dct_const_round_shift(s12 - s14), 8);
+  x15 = WRAPLOW(dct_const_round_shift(s13 - s15), 8);
+
+  // stage 4
+  s2 = (- cospi_16_64) * (x2 + x3);
+  s3 = cospi_16_64 * (x2 - x3);
+  s6 = cospi_16_64 * (x6 + x7);
+  s7 = cospi_16_64 * (- x6 + x7);
+  s10 = cospi_16_64 * (x10 + x11);
+  s11 = cospi_16_64 * (- x10 + x11);
+  s14 = (- cospi_16_64) * (x14 + x15);
+  s15 = cospi_16_64 * (x14 - x15);
+
+  x2 = WRAPLOW(dct_const_round_shift(s2), 8);
+  x3 = WRAPLOW(dct_const_round_shift(s3), 8);
+  x6 = WRAPLOW(dct_const_round_shift(s6), 8);
+  x7 = WRAPLOW(dct_const_round_shift(s7), 8);
+  x10 = WRAPLOW(dct_const_round_shift(s10), 8);
+  x11 = WRAPLOW(dct_const_round_shift(s11), 8);
+  x14 = WRAPLOW(dct_const_round_shift(s14), 8);
+  x15 = WRAPLOW(dct_const_round_shift(s15), 8);
+
+  output[0] = WRAPLOW(x0, 8);
+  output[1] = WRAPLOW(-x8, 8);
+  output[2] = WRAPLOW(x12, 8);
+  output[3] = WRAPLOW(-x4, 8);
+  output[4] = WRAPLOW(x6, 8);
+  output[5] = WRAPLOW(x14, 8);
+  output[6] = WRAPLOW(x10, 8);
+  output[7] = WRAPLOW(x2, 8);
+  output[8] = WRAPLOW(x3, 8);
+  output[9] = WRAPLOW(x11, 8);
+  output[10] = WRAPLOW(x15, 8);
+  output[11] = WRAPLOW(x7, 8);
+  output[12] = WRAPLOW(x5, 8);
+  output[13] = WRAPLOW(-x13, 8);
+  output[14] = WRAPLOW(x9, 8);
+  output[15] = WRAPLOW(-x1, 8);
+}
+
+void vp9_idct16x16_10_add_c(const tran_low_t *input, uint8_t *dest,
+                            int stride) {
+  tran_low_t out[16 * 16] = { 0 };
+  tran_low_t *outptr = out;
+  int i, j;
+  tran_low_t temp_in[16], temp_out[16];
+
+  // First transform rows. Since all non-zero dct coefficients are in
+  // upper-left 4x4 area, we only need to calculate first 4 rows here.
+  for (i = 0; i < 4; ++i) {
+    idct16_c(input, outptr);
+    input += 16;
+    outptr += 16;
+  }
+
+  // Then transform columns
+  for (i = 0; i < 16; ++i) {
+    for (j = 0; j < 16; ++j)
+      temp_in[j] = out[j*16 + i];
+    idct16_c(temp_in, temp_out);
+    for (j = 0; j < 16; ++j) {
+      dest[j * stride + i] = clip_pixel_add(dest[j * stride + i],
+                                            ROUND_POWER_OF_TWO(temp_out[j], 6));
+    }
+  }
+}
+
+void vp9_idct16x16_1_add_c(const tran_low_t *input, uint8_t *dest, int stride) {
+  int i, j;
+  tran_high_t a1;
+  tran_low_t out = WRAPLOW(dct_const_round_shift(input[0] * cospi_16_64), 8);
+  out = WRAPLOW(dct_const_round_shift(out * cospi_16_64), 8);
+  a1 = ROUND_POWER_OF_TWO(out, 6);
+  for (j = 0; j < 16; ++j) {
+    for (i = 0; i < 16; ++i)
+      dest[i] = clip_pixel_add(dest[i], a1);
+    dest += stride;
+  }
+}
+
+void idct32_c(const tran_low_t *input, tran_low_t *output) {
+  tran_low_t step1[32], step2[32];
+  tran_high_t temp1, temp2;
+
+  // stage 1
+  step1[0] = input[0];
+  step1[1] = input[16];
+  step1[2] = input[8];
+  step1[3] = input[24];
+  step1[4] = input[4];
+  step1[5] = input[20];
+  step1[6] = input[12];
+  step1[7] = input[28];
+  step1[8] = input[2];
+  step1[9] = input[18];
+  step1[10] = input[10];
+  step1[11] = input[26];
+  step1[12] = input[6];
+  step1[13] = input[22];
+  step1[14] = input[14];
+  step1[15] = input[30];
+
+  temp1 = input[1] * cospi_31_64 - input[31] * cospi_1_64;
+  temp2 = input[1] * cospi_1_64 + input[31] * cospi_31_64;
+  step1[16] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[31] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  temp1 = input[17] * cospi_15_64 - input[15] * cospi_17_64;
+  temp2 = input[17] * cospi_17_64 + input[15] * cospi_15_64;
+  step1[17] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[30] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  temp1 = input[9] * cospi_23_64 - input[23] * cospi_9_64;
+  temp2 = input[9] * cospi_9_64 + input[23] * cospi_23_64;
+  step1[18] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[29] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  temp1 = input[25] * cospi_7_64 - input[7] * cospi_25_64;
+  temp2 = input[25] * cospi_25_64 + input[7] * cospi_7_64;
+  step1[19] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[28] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  temp1 = input[5] * cospi_27_64 - input[27] * cospi_5_64;
+  temp2 = input[5] * cospi_5_64 + input[27] * cospi_27_64;
+  step1[20] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[27] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  temp1 = input[21] * cospi_11_64 - input[11] * cospi_21_64;
+  temp2 = input[21] * cospi_21_64 + input[11] * cospi_11_64;
+  step1[21] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[26] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  temp1 = input[13] * cospi_19_64 - input[19] * cospi_13_64;
+  temp2 = input[13] * cospi_13_64 + input[19] * cospi_19_64;
+  step1[22] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[25] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  temp1 = input[29] * cospi_3_64 - input[3] * cospi_29_64;
+  temp2 = input[29] * cospi_29_64 + input[3] * cospi_3_64;
+  step1[23] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[24] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  // stage 2
+  step2[0] = step1[0];
+  step2[1] = step1[1];
+  step2[2] = step1[2];
+  step2[3] = step1[3];
+  step2[4] = step1[4];
+  step2[5] = step1[5];
+  step2[6] = step1[6];
+  step2[7] = step1[7];
+
+  temp1 = step1[8] * cospi_30_64 - step1[15] * cospi_2_64;
+  temp2 = step1[8] * cospi_2_64 + step1[15] * cospi_30_64;
+  step2[8] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[15] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  temp1 = step1[9] * cospi_14_64 - step1[14] * cospi_18_64;
+  temp2 = step1[9] * cospi_18_64 + step1[14] * cospi_14_64;
+  step2[9] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[14] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  temp1 = step1[10] * cospi_22_64 - step1[13] * cospi_10_64;
+  temp2 = step1[10] * cospi_10_64 + step1[13] * cospi_22_64;
+  step2[10] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[13] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  temp1 = step1[11] * cospi_6_64 - step1[12] * cospi_26_64;
+  temp2 = step1[11] * cospi_26_64 + step1[12] * cospi_6_64;
+  step2[11] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[12] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  step2[16] = WRAPLOW(step1[16] + step1[17], 8);
+  step2[17] = WRAPLOW(step1[16] - step1[17], 8);
+  step2[18] = WRAPLOW(-step1[18] + step1[19], 8);
+  step2[19] = WRAPLOW(step1[18] + step1[19], 8);
+  step2[20] = WRAPLOW(step1[20] + step1[21], 8);
+  step2[21] = WRAPLOW(step1[20] - step1[21], 8);
+  step2[22] = WRAPLOW(-step1[22] + step1[23], 8);
+  step2[23] = WRAPLOW(step1[22] + step1[23], 8);
+  step2[24] = WRAPLOW(step1[24] + step1[25], 8);
+  step2[25] = WRAPLOW(step1[24] - step1[25], 8);
+  step2[26] = WRAPLOW(-step1[26] + step1[27], 8);
+  step2[27] = WRAPLOW(step1[26] + step1[27], 8);
+  step2[28] = WRAPLOW(step1[28] + step1[29], 8);
+  step2[29] = WRAPLOW(step1[28] - step1[29], 8);
+  step2[30] = WRAPLOW(-step1[30] + step1[31], 8);
+  step2[31] = WRAPLOW(step1[30] + step1[31], 8);
+
+  // stage 3
+  step1[0] = step2[0];
+  step1[1] = step2[1];
+  step1[2] = step2[2];
+  step1[3] = step2[3];
+
+  temp1 = step2[4] * cospi_28_64 - step2[7] * cospi_4_64;
+  temp2 = step2[4] * cospi_4_64 + step2[7] * cospi_28_64;
+  step1[4] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[7] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  temp1 = step2[5] * cospi_12_64 - step2[6] * cospi_20_64;
+  temp2 = step2[5] * cospi_20_64 + step2[6] * cospi_12_64;
+  step1[5] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[6] = WRAPLOW(dct_const_round_shift(temp2), 8);
+
+  step1[8] = WRAPLOW(step2[8] + step2[9], 8);
+  step1[9] = WRAPLOW(step2[8] - step2[9], 8);
+  step1[10] = WRAPLOW(-step2[10] + step2[11], 8);
+  step1[11] = WRAPLOW(step2[10] + step2[11], 8);
+  step1[12] = WRAPLOW(step2[12] + step2[13], 8);
+  step1[13] = WRAPLOW(step2[12] - step2[13], 8);
+  step1[14] = WRAPLOW(-step2[14] + step2[15], 8);
+  step1[15] = WRAPLOW(step2[14] + step2[15], 8);
+
+  step1[16] = step2[16];
+  step1[31] = step2[31];
+  temp1 = -step2[17] * cospi_4_64 + step2[30] * cospi_28_64;
+  temp2 = step2[17] * cospi_28_64 + step2[30] * cospi_4_64;
+  step1[17] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[30] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  temp1 = -step2[18] * cospi_28_64 - step2[29] * cospi_4_64;
+  temp2 = -step2[18] * cospi_4_64 + step2[29] * cospi_28_64;
+  step1[18] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[29] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  step1[19] = step2[19];
+  step1[20] = step2[20];
+  temp1 = -step2[21] * cospi_20_64 + step2[26] * cospi_12_64;
+  temp2 = step2[21] * cospi_12_64 + step2[26] * cospi_20_64;
+  step1[21] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[26] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  temp1 = -step2[22] * cospi_12_64 - step2[25] * cospi_20_64;
+  temp2 = -step2[22] * cospi_20_64 + step2[25] * cospi_12_64;
+  step1[22] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[25] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  step1[23] = step2[23];
+  step1[24] = step2[24];
+  step1[27] = step2[27];
+  step1[28] = step2[28];
+
+  // stage 4
+  temp1 = (step1[0] + step1[1]) * cospi_16_64;
+  temp2 = (step1[0] - step1[1]) * cospi_16_64;
+  step2[0] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[1] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  temp1 = step1[2] * cospi_24_64 - step1[3] * cospi_8_64;
+  temp2 = step1[2] * cospi_8_64 + step1[3] * cospi_24_64;
+  step2[2] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[3] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  step2[4] = WRAPLOW(step1[4] + step1[5], 8);
+  step2[5] = WRAPLOW(step1[4] - step1[5], 8);
+  step2[6] = WRAPLOW(-step1[6] + step1[7], 8);
+  step2[7] = WRAPLOW(step1[6] + step1[7], 8);
+
+  step2[8] = step1[8];
+  step2[15] = step1[15];
+  temp1 = -step1[9] * cospi_8_64 + step1[14] * cospi_24_64;
+  temp2 = step1[9] * cospi_24_64 + step1[14] * cospi_8_64;
+  step2[9] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[14] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  temp1 = -step1[10] * cospi_24_64 - step1[13] * cospi_8_64;
+  temp2 = -step1[10] * cospi_8_64 + step1[13] * cospi_24_64;
+  step2[10] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[13] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  step2[11] = step1[11];
+  step2[12] = step1[12];
+
+  step2[16] = WRAPLOW(step1[16] + step1[19], 8);
+  step2[17] = WRAPLOW(step1[17] + step1[18], 8);
+  step2[18] = WRAPLOW(step1[17] - step1[18], 8);
+  step2[19] = WRAPLOW(step1[16] - step1[19], 8);
+  step2[20] = WRAPLOW(-step1[20] + step1[23], 8);
+  step2[21] = WRAPLOW(-step1[21] + step1[22], 8);
+  step2[22] = WRAPLOW(step1[21] + step1[22], 8);
+  step2[23] = WRAPLOW(step1[20] + step1[23], 8);
+
+  step2[24] = WRAPLOW(step1[24] + step1[27], 8);
+  step2[25] = WRAPLOW(step1[25] + step1[26], 8);
+  step2[26] = WRAPLOW(step1[25] - step1[26], 8);
+  step2[27] = WRAPLOW(step1[24] - step1[27], 8);
+  step2[28] = WRAPLOW(-step1[28] + step1[31], 8);
+  step2[29] = WRAPLOW(-step1[29] + step1[30], 8);
+  step2[30] = WRAPLOW(step1[29] + step1[30], 8);
+  step2[31] = WRAPLOW(step1[28] + step1[31], 8);
+
+  // stage 5
+  step1[0] = WRAPLOW(step2[0] + step2[3], 8);
+  step1[1] = WRAPLOW(step2[1] + step2[2], 8);
+  step1[2] = WRAPLOW(step2[1] - step2[2], 8);
+  step1[3] = WRAPLOW(step2[0] - step2[3], 8);
+  step1[4] = step2[4];
+  temp1 = (step2[6] - step2[5]) * cospi_16_64;
+  temp2 = (step2[5] + step2[6]) * cospi_16_64;
+  step1[5] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[6] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  step1[7] = step2[7];
+
+  step1[8] = WRAPLOW(step2[8] + step2[11], 8);
+  step1[9] = WRAPLOW(step2[9] + step2[10], 8);
+  step1[10] = WRAPLOW(step2[9] - step2[10], 8);
+  step1[11] = WRAPLOW(step2[8] - step2[11], 8);
+  step1[12] = WRAPLOW(-step2[12] + step2[15], 8);
+  step1[13] = WRAPLOW(-step2[13] + step2[14], 8);
+  step1[14] = WRAPLOW(step2[13] + step2[14], 8);
+  step1[15] = WRAPLOW(step2[12] + step2[15], 8);
+
+  step1[16] = step2[16];
+  step1[17] = step2[17];
+  temp1 = -step2[18] * cospi_8_64 + step2[29] * cospi_24_64;
+  temp2 = step2[18] * cospi_24_64 + step2[29] * cospi_8_64;
+  step1[18] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[29] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  temp1 = -step2[19] * cospi_8_64 + step2[28] * cospi_24_64;
+  temp2 = step2[19] * cospi_24_64 + step2[28] * cospi_8_64;
+  step1[19] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[28] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  temp1 = -step2[20] * cospi_24_64 - step2[27] * cospi_8_64;
+  temp2 = -step2[20] * cospi_8_64 + step2[27] * cospi_24_64;
+  step1[20] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[27] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  temp1 = -step2[21] * cospi_24_64 - step2[26] * cospi_8_64;
+  temp2 = -step2[21] * cospi_8_64 + step2[26] * cospi_24_64;
+  step1[21] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[26] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  step1[22] = step2[22];
+  step1[23] = step2[23];
+  step1[24] = step2[24];
+  step1[25] = step2[25];
+  step1[30] = step2[30];
+  step1[31] = step2[31];
+
+  // stage 6
+  step2[0] = WRAPLOW(step1[0] + step1[7], 8);
+  step2[1] = WRAPLOW(step1[1] + step1[6], 8);
+  step2[2] = WRAPLOW(step1[2] + step1[5], 8);
+  step2[3] = WRAPLOW(step1[3] + step1[4], 8);
+  step2[4] = WRAPLOW(step1[3] - step1[4], 8);
+  step2[5] = WRAPLOW(step1[2] - step1[5], 8);
+  step2[6] = WRAPLOW(step1[1] - step1[6], 8);
+  step2[7] = WRAPLOW(step1[0] - step1[7], 8);
+  step2[8] = step1[8];
+  step2[9] = step1[9];
+  temp1 = (-step1[10] + step1[13]) * cospi_16_64;
+  temp2 = (step1[10] + step1[13]) * cospi_16_64;
+  step2[10] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[13] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  temp1 = (-step1[11] + step1[12]) * cospi_16_64;
+  temp2 = (step1[11] + step1[12]) * cospi_16_64;
+  step2[11] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step2[12] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  step2[14] = step1[14];
+  step2[15] = step1[15];
+
+  step2[16] = WRAPLOW(step1[16] + step1[23], 8);
+  step2[17] = WRAPLOW(step1[17] + step1[22], 8);
+  step2[18] = WRAPLOW(step1[18] + step1[21], 8);
+  step2[19] = WRAPLOW(step1[19] + step1[20], 8);
+  step2[20] = WRAPLOW(step1[19] - step1[20], 8);
+  step2[21] = WRAPLOW(step1[18] - step1[21], 8);
+  step2[22] = WRAPLOW(step1[17] - step1[22], 8);
+  step2[23] = WRAPLOW(step1[16] - step1[23], 8);
+
+  step2[24] = WRAPLOW(-step1[24] + step1[31], 8);
+  step2[25] = WRAPLOW(-step1[25] + step1[30], 8);
+  step2[26] = WRAPLOW(-step1[26] + step1[29], 8);
+  step2[27] = WRAPLOW(-step1[27] + step1[28], 8);
+  step2[28] = WRAPLOW(step1[27] + step1[28], 8);
+  step2[29] = WRAPLOW(step1[26] + step1[29], 8);
+  step2[30] = WRAPLOW(step1[25] + step1[30], 8);
+  step2[31] = WRAPLOW(step1[24] + step1[31], 8);
+
+  // stage 7
+  step1[0] = WRAPLOW(step2[0] + step2[15], 8);
+  step1[1] = WRAPLOW(step2[1] + step2[14], 8);
+  step1[2] = WRAPLOW(step2[2] + step2[13], 8);
+  step1[3] = WRAPLOW(step2[3] + step2[12], 8);
+  step1[4] = WRAPLOW(step2[4] + step2[11], 8);
+  step1[5] = WRAPLOW(step2[5] + step2[10], 8);
+  step1[6] = WRAPLOW(step2[6] + step2[9], 8);
+  step1[7] = WRAPLOW(step2[7] + step2[8], 8);
+  step1[8] = WRAPLOW(step2[7] - step2[8], 8);
+  step1[9] = WRAPLOW(step2[6] - step2[9], 8);
+  step1[10] = WRAPLOW(step2[5] - step2[10], 8);
+  step1[11] = WRAPLOW(step2[4] - step2[11], 8);
+  step1[12] = WRAPLOW(step2[3] - step2[12], 8);
+  step1[13] = WRAPLOW(step2[2] - step2[13], 8);
+  step1[14] = WRAPLOW(step2[1] - step2[14], 8);
+  step1[15] = WRAPLOW(step2[0] - step2[15], 8);
+
+  step1[16] = step2[16];
+  step1[17] = step2[17];
+  step1[18] = step2[18];
+  step1[19] = step2[19];
+  temp1 = (-step2[20] + step2[27]) * cospi_16_64;
+  temp2 = (step2[20] + step2[27]) * cospi_16_64;
+  step1[20] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[27] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  temp1 = (-step2[21] + step2[26]) * cospi_16_64;
+  temp2 = (step2[21] + step2[26]) * cospi_16_64;
+  step1[21] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[26] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  temp1 = (-step2[22] + step2[25]) * cospi_16_64;
+  temp2 = (step2[22] + step2[25]) * cospi_16_64;
+  step1[22] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[25] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  temp1 = (-step2[23] + step2[24]) * cospi_16_64;
+  temp2 = (step2[23] + step2[24]) * cospi_16_64;
+  step1[23] = WRAPLOW(dct_const_round_shift(temp1), 8);
+  step1[24] = WRAPLOW(dct_const_round_shift(temp2), 8);
+  step1[28] = step2[28];
+  step1[29] = step2[29];
+  step1[30] = step2[30];
+  step1[31] = step2[31];
+
+  // final stage
+  output[0] = WRAPLOW(step1[0] + step1[31], 8);
+  output[1] = WRAPLOW(step1[1] + step1[30], 8);
+  output[2] = WRAPLOW(step1[2] + step1[29], 8);
+  output[3] = WRAPLOW(step1[3] + step1[28], 8);
+  output[4] = WRAPLOW(step1[4] + step1[27], 8);
+  output[5] = WRAPLOW(step1[5] + step1[26], 8);
+  output[6] = WRAPLOW(step1[6] + step1[25], 8);
+  output[7] = WRAPLOW(step1[7] + step1[24], 8);
+  output[8] = WRAPLOW(step1[8] + step1[23], 8);
+  output[9] = WRAPLOW(step1[9] + step1[22], 8);
+  output[10] = WRAPLOW(step1[10] + step1[21], 8);
+  output[11] = WRAPLOW(step1[11] + step1[20], 8);
+  output[12] = WRAPLOW(step1[12] + step1[19], 8);
+  output[13] = WRAPLOW(step1[13] + step1[18], 8);
+  output[14] = WRAPLOW(step1[14] + step1[17], 8);
+  output[15] = WRAPLOW(step1[15] + step1[16], 8);
+  output[16] = WRAPLOW(step1[15] - step1[16], 8);
+  output[17] = WRAPLOW(step1[14] - step1[17], 8);
+  output[18] = WRAPLOW(step1[13] - step1[18], 8);
+  output[19] = WRAPLOW(step1[12] - step1[19], 8);
+  output[20] = WRAPLOW(step1[11] - step1[20], 8);
+  output[21] = WRAPLOW(step1[10] - step1[21], 8);
+  output[22] = WRAPLOW(step1[9] - step1[22], 8);
+  output[23] = WRAPLOW(step1[8] - step1[23], 8);
+  output[24] = WRAPLOW(step1[7] - step1[24], 8);
+  output[25] = WRAPLOW(step1[6] - step1[25], 8);
+  output[26] = WRAPLOW(step1[5] - step1[26], 8);
+  output[27] = WRAPLOW(step1[4] - step1[27], 8);
+  output[28] = WRAPLOW(step1[3] - step1[28], 8);
+  output[29] = WRAPLOW(step1[2] - step1[29], 8);
+  output[30] = WRAPLOW(step1[1] - step1[30], 8);
+  output[31] = WRAPLOW(step1[0] - step1[31], 8);
+}
+
+void vp9_idct32x32_1024_add_c(const tran_low_t *input, uint8_t *dest,
+                              int stride) {
+  tran_low_t out[32 * 32];
+  tran_low_t *outptr = out;
+  int i, j;
+  tran_low_t temp_in[32], temp_out[32];
+
+  // Rows
+  for (i = 0; i < 32; ++i) {
+    int16_t zero_coeff[16];
+    for (j = 0; j < 16; ++j)
+      zero_coeff[j] = input[2 * j] | input[2 * j + 1];
+    for (j = 0; j < 8; ++j)
+      zero_coeff[j] = zero_coeff[2 * j] | zero_coeff[2 * j + 1];
+    for (j = 0; j < 4; ++j)
+      zero_coeff[j] = zero_coeff[2 * j] | zero_coeff[2 * j + 1];
+    for (j = 0; j < 2; ++j)
+      zero_coeff[j] = zero_coeff[2 * j] | zero_coeff[2 * j + 1];
+
+    if (zero_coeff[0] | zero_coeff[1])
+      idct32_c(input, outptr);
+    else
+      memset(outptr, 0, sizeof(tran_low_t) * 32);
+    input += 32;
+    outptr += 32;
+  }
+
+  // Columns
+  for (i = 0; i < 32; ++i) {
+    for (j = 0; j < 32; ++j)
+      temp_in[j] = out[j * 32 + i];
+    idct32_c(temp_in, temp_out);
+    for (j = 0; j < 32; ++j) {
+      dest[j * stride + i] = clip_pixel_add(dest[j * stride + i],
+                                            ROUND_POWER_OF_TWO(temp_out[j], 6));
+    }
+  }
+}
+
+void vp9_idct32x32_34_add_c(const tran_low_t *input, uint8_t *dest,
+                            int stride) {
+  tran_low_t out[32 * 32] = {0};
+  tran_low_t *outptr = out;
+  int i, j;
+  tran_low_t temp_in[32], temp_out[32];
+
+  // Rows
+  // only upper-left 8x8 has non-zero coeff
+  for (i = 0; i < 8; ++i) {
+    idct32_c(input, outptr);
+    input += 32;
+    outptr += 32;
+  }
+
+  // Columns
+  for (i = 0; i < 32; ++i) {
+    for (j = 0; j < 32; ++j)
+      temp_in[j] = out[j * 32 + i];
+    idct32_c(temp_in, temp_out);
+    for (j = 0; j < 32; ++j) {
+      dest[j * stride + i] = clip_pixel_add(dest[j * stride + i],
+                                            ROUND_POWER_OF_TWO(temp_out[j], 6));
+    }
+  }
+}
+
+void vp9_idct32x32_1_add_c(const tran_low_t *input, uint8_t *dest, int stride) {
+  int i, j;
+  tran_high_t a1;
+
+  tran_low_t out = WRAPLOW(dct_const_round_shift(input[0] * cospi_16_64), 8);
+  out = WRAPLOW(dct_const_round_shift(out * cospi_16_64), 8);
+  a1 = ROUND_POWER_OF_TWO(out, 6);
+
+  for (j = 0; j < 32; ++j) {
+    for (i = 0; i < 32; ++i)
+      dest[i] = clip_pixel_add(dest[i], a1);
+    dest += stride;
+  }
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void vp9_highbd_iwht4x4_16_add_c(const tran_low_t *input, uint8_t *dest8,
+                                 int stride, int bd) {
+  /* 4-point reversible, orthonormal inverse Walsh-Hadamard in 3.5 adds,
+     0.5 shifts per pixel. */
+  int i;
+  tran_low_t output[16];
+  tran_high_t a1, b1, c1, d1, e1;
+  const tran_low_t *ip = input;
+  tran_low_t *op = output;
+  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
+
+  for (i = 0; i < 4; i++) {
+    a1 = ip[0] >> UNIT_QUANT_SHIFT;
+    c1 = ip[1] >> UNIT_QUANT_SHIFT;
+    d1 = ip[2] >> UNIT_QUANT_SHIFT;
+    b1 = ip[3] >> UNIT_QUANT_SHIFT;
+    a1 += c1;
+    d1 -= b1;
+    e1 = (a1 - d1) >> 1;
+    b1 = e1 - b1;
+    c1 = e1 - c1;
+    a1 -= b1;
+    d1 += c1;
+    op[0] = WRAPLOW(a1, bd);
+    op[1] = WRAPLOW(b1, bd);
+    op[2] = WRAPLOW(c1, bd);
+    op[3] = WRAPLOW(d1, bd);
+    ip += 4;
+    op += 4;
+  }
+
+  ip = output;
+  for (i = 0; i < 4; i++) {
+    a1 = ip[4 * 0];
+    c1 = ip[4 * 1];
+    d1 = ip[4 * 2];
+    b1 = ip[4 * 3];
+    a1 += c1;
+    d1 -= b1;
+    e1 = (a1 - d1) >> 1;
+    b1 = e1 - b1;
+    c1 = e1 - c1;
+    a1 -= b1;
+    d1 += c1;
+    dest[stride * 0] = highbd_clip_pixel_add(dest[stride * 0], a1, bd);
+    dest[stride * 1] = highbd_clip_pixel_add(dest[stride * 1], b1, bd);
+    dest[stride * 2] = highbd_clip_pixel_add(dest[stride * 2], c1, bd);
+    dest[stride * 3] = highbd_clip_pixel_add(dest[stride * 3], d1, bd);
+
+    ip++;
+    dest++;
+  }
+}
+
+void vp9_highbd_iwht4x4_1_add_c(const tran_low_t *in, uint8_t *dest8,
+                                int dest_stride, int bd) {
+  int i;
+  tran_high_t a1, e1;
+  tran_low_t tmp[4];
+  const tran_low_t *ip = in;
+  tran_low_t *op = tmp;
+  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
+  (void) bd;
+
+  a1 = ip[0] >> UNIT_QUANT_SHIFT;
+  e1 = a1 >> 1;
+  a1 -= e1;
+  op[0] = WRAPLOW(a1, bd);
+  op[1] = op[2] = op[3] = WRAPLOW(e1, bd);
+
+  ip = tmp;
+  for (i = 0; i < 4; i++) {
+    e1 = ip[0] >> 1;
+    a1 = ip[0] - e1;
+    dest[dest_stride * 0] = highbd_clip_pixel_add(
+        dest[dest_stride * 0], a1, bd);
+    dest[dest_stride * 1] = highbd_clip_pixel_add(
+        dest[dest_stride * 1], e1, bd);
+    dest[dest_stride * 2] = highbd_clip_pixel_add(
+        dest[dest_stride * 2], e1, bd);
+    dest[dest_stride * 3] = highbd_clip_pixel_add(
+        dest[dest_stride * 3], e1, bd);
+    ip++;
+    dest++;
+  }
+}
+
+void vp9_highbd_idct4_c(const tran_low_t *input, tran_low_t *output, int bd) {
+  tran_low_t step[4];
+  tran_high_t temp1, temp2;
+  (void) bd;
+  // stage 1
+  temp1 = (input[0] + input[2]) * cospi_16_64;
+  temp2 = (input[0] - input[2]) * cospi_16_64;
+  step[0] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step[1] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  temp1 = input[1] * cospi_24_64 - input[3] * cospi_8_64;
+  temp2 = input[1] * cospi_8_64 + input[3] * cospi_24_64;
+  step[2] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step[3] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  // stage 2
+  output[0] = WRAPLOW(step[0] + step[3], bd);
+  output[1] = WRAPLOW(step[1] + step[2], bd);
+  output[2] = WRAPLOW(step[1] - step[2], bd);
+  output[3] = WRAPLOW(step[0] - step[3], bd);
+}
+
+void vp9_highbd_idct4x4_16_add_c(const tran_low_t *input, uint8_t *dest8,
+                                 int stride, int bd) {
+  tran_low_t out[4 * 4];
+  tran_low_t *outptr = out;
+  int i, j;
+  tran_low_t temp_in[4], temp_out[4];
+  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
+
+  // Rows
+  for (i = 0; i < 4; ++i) {
+    vp9_highbd_idct4_c(input, outptr, bd);
+    input += 4;
+    outptr += 4;
+  }
+
+  // Columns
+  for (i = 0; i < 4; ++i) {
+    for (j = 0; j < 4; ++j)
+      temp_in[j] = out[j * 4 + i];
+    vp9_highbd_idct4_c(temp_in, temp_out, bd);
+    for (j = 0; j < 4; ++j) {
+      dest[j * stride + i] = highbd_clip_pixel_add(
+          dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 4), bd);
+    }
+  }
+}
+
+void vp9_highbd_idct4x4_1_add_c(const tran_low_t *input, uint8_t *dest8,
+                                int dest_stride, int bd) {
+  int i;
+  tran_high_t a1;
+  tran_low_t out = WRAPLOW(
+      highbd_dct_const_round_shift(input[0] * cospi_16_64, bd), bd);
+  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
+
+  out = WRAPLOW(highbd_dct_const_round_shift(out * cospi_16_64, bd), bd);
+  a1 = ROUND_POWER_OF_TWO(out, 4);
+
+  for (i = 0; i < 4; i++) {
+    dest[0] = highbd_clip_pixel_add(dest[0], a1, bd);
+    dest[1] = highbd_clip_pixel_add(dest[1], a1, bd);
+    dest[2] = highbd_clip_pixel_add(dest[2], a1, bd);
+    dest[3] = highbd_clip_pixel_add(dest[3], a1, bd);
+    dest += dest_stride;
+  }
+}
+
+void vp9_highbd_idct8_c(const tran_low_t *input, tran_low_t *output, int bd) {
+  tran_low_t step1[8], step2[8];
+  tran_high_t temp1, temp2;
+  // stage 1
+  step1[0] = input[0];
+  step1[2] = input[4];
+  step1[1] = input[2];
+  step1[3] = input[6];
+  temp1 = input[1] * cospi_28_64 - input[7] * cospi_4_64;
+  temp2 = input[1] * cospi_4_64 + input[7] * cospi_28_64;
+  step1[4] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[7] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  temp1 = input[5] * cospi_12_64 - input[3] * cospi_20_64;
+  temp2 = input[5] * cospi_20_64 + input[3] * cospi_12_64;
+  step1[5] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[6] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  // stage 2 & stage 3 - even half
+  vp9_highbd_idct4_c(step1, step1, bd);
+
+  // stage 2 - odd half
+  step2[4] = WRAPLOW(step1[4] + step1[5], bd);
+  step2[5] = WRAPLOW(step1[4] - step1[5], bd);
+  step2[6] = WRAPLOW(-step1[6] + step1[7], bd);
+  step2[7] = WRAPLOW(step1[6] + step1[7], bd);
+
+  // stage 3 - odd half
+  step1[4] = step2[4];
+  temp1 = (step2[6] - step2[5]) * cospi_16_64;
+  temp2 = (step2[5] + step2[6]) * cospi_16_64;
+  step1[5] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[6] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  step1[7] = step2[7];
+
+  // stage 4
+  output[0] = WRAPLOW(step1[0] + step1[7], bd);
+  output[1] = WRAPLOW(step1[1] + step1[6], bd);
+  output[2] = WRAPLOW(step1[2] + step1[5], bd);
+  output[3] = WRAPLOW(step1[3] + step1[4], bd);
+  output[4] = WRAPLOW(step1[3] - step1[4], bd);
+  output[5] = WRAPLOW(step1[2] - step1[5], bd);
+  output[6] = WRAPLOW(step1[1] - step1[6], bd);
+  output[7] = WRAPLOW(step1[0] - step1[7], bd);
+}
+
+void vp9_highbd_idct8x8_64_add_c(const tran_low_t *input, uint8_t *dest8,
+                                 int stride, int bd) {
+  tran_low_t out[8 * 8];
+  tran_low_t *outptr = out;
+  int i, j;
+  tran_low_t temp_in[8], temp_out[8];
+  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
+
+  // First transform rows.
+  for (i = 0; i < 8; ++i) {
+    vp9_highbd_idct8_c(input, outptr, bd);
+    input += 8;
+    outptr += 8;
+  }
+
+  // Then transform columns.
+  for (i = 0; i < 8; ++i) {
+    for (j = 0; j < 8; ++j)
+      temp_in[j] = out[j * 8 + i];
+    vp9_highbd_idct8_c(temp_in, temp_out, bd);
+    for (j = 0; j < 8; ++j) {
+      dest[j * stride + i] = highbd_clip_pixel_add(
+          dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 5), bd);
+    }
+  }
+}
+
+void vp9_highbd_idct8x8_1_add_c(const tran_low_t *input, uint8_t *dest8,
+                                int stride, int bd) {
+  int i, j;
+  tran_high_t a1;
+  tran_low_t out = WRAPLOW(
+      highbd_dct_const_round_shift(input[0] * cospi_16_64, bd), bd);
+  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
+  out = WRAPLOW(highbd_dct_const_round_shift(out * cospi_16_64, bd), bd);
+  a1 = ROUND_POWER_OF_TWO(out, 5);
+  for (j = 0; j < 8; ++j) {
+    for (i = 0; i < 8; ++i)
+      dest[i] = highbd_clip_pixel_add(dest[i], a1, bd);
+    dest += stride;
+  }
+}
+
+void highbd_iadst4_c(const tran_low_t *input, tran_low_t *output, int bd) {
+  tran_high_t s0, s1, s2, s3, s4, s5, s6, s7;
+
+  tran_low_t x0 = input[0];
+  tran_low_t x1 = input[1];
+  tran_low_t x2 = input[2];
+  tran_low_t x3 = input[3];
+  (void) bd;
+
+  if (!(x0 | x1 | x2 | x3)) {
+    memset(output, 0, 4 * sizeof(*output));
+    return;
+  }
+
+  s0 = sinpi_1_9 * x0;
+  s1 = sinpi_2_9 * x0;
+  s2 = sinpi_3_9 * x1;
+  s3 = sinpi_4_9 * x2;
+  s4 = sinpi_1_9 * x2;
+  s5 = sinpi_2_9 * x3;
+  s6 = sinpi_4_9 * x3;
+  s7 = (tran_high_t)(x0 - x2 + x3);
+
+  s0 = s0 + s3 + s5;
+  s1 = s1 - s4 - s6;
+  s3 = s2;
+  s2 = sinpi_3_9 * s7;
+
+  // 1-D transform scaling factor is sqrt(2).
+  // The overall dynamic range is 14b (input) + 14b (multiplication scaling)
+  // + 1b (addition) = 29b.
+  // Hence the output bit depth is 15b.
+  output[0] = WRAPLOW(highbd_dct_const_round_shift(s0 + s3, bd), bd);
+  output[1] = WRAPLOW(highbd_dct_const_round_shift(s1 + s3, bd), bd);
+  output[2] = WRAPLOW(highbd_dct_const_round_shift(s2, bd), bd);
+  output[3] = WRAPLOW(highbd_dct_const_round_shift(s0 + s1 - s3, bd), bd);
+}
+
+void highbd_iadst8_c(const tran_low_t *input, tran_low_t *output, int bd) {
+  tran_high_t s0, s1, s2, s3, s4, s5, s6, s7;
+
+  tran_low_t x0 = input[7];
+  tran_low_t x1 = input[0];
+  tran_low_t x2 = input[5];
+  tran_low_t x3 = input[2];
+  tran_low_t x4 = input[3];
+  tran_low_t x5 = input[4];
+  tran_low_t x6 = input[1];
+  tran_low_t x7 = input[6];
+  (void) bd;
+
+  if (!(x0 | x1 | x2 | x3 | x4 | x5 | x6 | x7)) {
+    memset(output, 0, 8 * sizeof(*output));
+    return;
+  }
+
+  // stage 1
+  s0 = cospi_2_64  * x0 + cospi_30_64 * x1;
+  s1 = cospi_30_64 * x0 - cospi_2_64  * x1;
+  s2 = cospi_10_64 * x2 + cospi_22_64 * x3;
+  s3 = cospi_22_64 * x2 - cospi_10_64 * x3;
+  s4 = cospi_18_64 * x4 + cospi_14_64 * x5;
+  s5 = cospi_14_64 * x4 - cospi_18_64 * x5;
+  s6 = cospi_26_64 * x6 + cospi_6_64  * x7;
+  s7 = cospi_6_64  * x6 - cospi_26_64 * x7;
+
+  x0 = WRAPLOW(highbd_dct_const_round_shift(s0 + s4, bd), bd);
+  x1 = WRAPLOW(highbd_dct_const_round_shift(s1 + s5, bd), bd);
+  x2 = WRAPLOW(highbd_dct_const_round_shift(s2 + s6, bd), bd);
+  x3 = WRAPLOW(highbd_dct_const_round_shift(s3 + s7, bd), bd);
+  x4 = WRAPLOW(highbd_dct_const_round_shift(s0 - s4, bd), bd);
+  x5 = WRAPLOW(highbd_dct_const_round_shift(s1 - s5, bd), bd);
+  x6 = WRAPLOW(highbd_dct_const_round_shift(s2 - s6, bd), bd);
+  x7 = WRAPLOW(highbd_dct_const_round_shift(s3 - s7, bd), bd);
+
+  // stage 2
+  s0 = x0;
+  s1 = x1;
+  s2 = x2;
+  s3 = x3;
+  s4 =  cospi_8_64  * x4 + cospi_24_64 * x5;
+  s5 =  cospi_24_64 * x4 - cospi_8_64  * x5;
+  s6 = -cospi_24_64 * x6 + cospi_8_64  * x7;
+  s7 =  cospi_8_64  * x6 + cospi_24_64 * x7;
+
+  x0 = WRAPLOW(s0 + s2, bd);
+  x1 = WRAPLOW(s1 + s3, bd);
+  x2 = WRAPLOW(s0 - s2, bd);
+  x3 = WRAPLOW(s1 - s3, bd);
+  x4 = WRAPLOW(highbd_dct_const_round_shift(s4 + s6, bd), bd);
+  x5 = WRAPLOW(highbd_dct_const_round_shift(s5 + s7, bd), bd);
+  x6 = WRAPLOW(highbd_dct_const_round_shift(s4 - s6, bd), bd);
+  x7 = WRAPLOW(highbd_dct_const_round_shift(s5 - s7, bd), bd);
+
+  // stage 3
+  s2 = cospi_16_64 * (x2 + x3);
+  s3 = cospi_16_64 * (x2 - x3);
+  s6 = cospi_16_64 * (x6 + x7);
+  s7 = cospi_16_64 * (x6 - x7);
+
+  x2 = WRAPLOW(highbd_dct_const_round_shift(s2, bd), bd);
+  x3 = WRAPLOW(highbd_dct_const_round_shift(s3, bd), bd);
+  x6 = WRAPLOW(highbd_dct_const_round_shift(s6, bd), bd);
+  x7 = WRAPLOW(highbd_dct_const_round_shift(s7, bd), bd);
+
+  output[0] = WRAPLOW(x0, bd);
+  output[1] = WRAPLOW(-x4, bd);
+  output[2] = WRAPLOW(x6, bd);
+  output[3] = WRAPLOW(-x2, bd);
+  output[4] = WRAPLOW(x3, bd);
+  output[5] = WRAPLOW(-x7, bd);
+  output[6] = WRAPLOW(x5, bd);
+  output[7] = WRAPLOW(-x1, bd);
+}
+
+void vp9_highbd_idct8x8_10_add_c(const tran_low_t *input, uint8_t *dest8,
+                                 int stride, int bd) {
+  tran_low_t out[8 * 8] = { 0 };
+  tran_low_t *outptr = out;
+  int i, j;
+  tran_low_t temp_in[8], temp_out[8];
+  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
+
+  // First transform rows.
+  // Only first 4 row has non-zero coefs.
+  for (i = 0; i < 4; ++i) {
+    vp9_highbd_idct8_c(input, outptr, bd);
+    input += 8;
+    outptr += 8;
+  }
+  // Then transform columns.
+  for (i = 0; i < 8; ++i) {
+    for (j = 0; j < 8; ++j)
+      temp_in[j] = out[j * 8 + i];
+    vp9_highbd_idct8_c(temp_in, temp_out, bd);
+    for (j = 0; j < 8; ++j) {
+      dest[j * stride + i] = highbd_clip_pixel_add(
+          dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 5), bd);
+    }
+  }
+}
+
+void vp9_highbd_idct16_c(const tran_low_t *input, tran_low_t *output, int bd) {
+  tran_low_t step1[16], step2[16];
+  tran_high_t temp1, temp2;
+  (void) bd;
+
+  // stage 1
+  step1[0] = input[0/2];
+  step1[1] = input[16/2];
+  step1[2] = input[8/2];
+  step1[3] = input[24/2];
+  step1[4] = input[4/2];
+  step1[5] = input[20/2];
+  step1[6] = input[12/2];
+  step1[7] = input[28/2];
+  step1[8] = input[2/2];
+  step1[9] = input[18/2];
+  step1[10] = input[10/2];
+  step1[11] = input[26/2];
+  step1[12] = input[6/2];
+  step1[13] = input[22/2];
+  step1[14] = input[14/2];
+  step1[15] = input[30/2];
+
+  // stage 2
+  step2[0] = step1[0];
+  step2[1] = step1[1];
+  step2[2] = step1[2];
+  step2[3] = step1[3];
+  step2[4] = step1[4];
+  step2[5] = step1[5];
+  step2[6] = step1[6];
+  step2[7] = step1[7];
+
+  temp1 = step1[8] * cospi_30_64 - step1[15] * cospi_2_64;
+  temp2 = step1[8] * cospi_2_64 + step1[15] * cospi_30_64;
+  step2[8] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[15] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  temp1 = step1[9] * cospi_14_64 - step1[14] * cospi_18_64;
+  temp2 = step1[9] * cospi_18_64 + step1[14] * cospi_14_64;
+  step2[9] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[14] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  temp1 = step1[10] * cospi_22_64 - step1[13] * cospi_10_64;
+  temp2 = step1[10] * cospi_10_64 + step1[13] * cospi_22_64;
+  step2[10] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[13] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  temp1 = step1[11] * cospi_6_64 - step1[12] * cospi_26_64;
+  temp2 = step1[11] * cospi_26_64 + step1[12] * cospi_6_64;
+  step2[11] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[12] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  // stage 3
+  step1[0] = step2[0];
+  step1[1] = step2[1];
+  step1[2] = step2[2];
+  step1[3] = step2[3];
+
+  temp1 = step2[4] * cospi_28_64 - step2[7] * cospi_4_64;
+  temp2 = step2[4] * cospi_4_64 + step2[7] * cospi_28_64;
+  step1[4] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[7] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  temp1 = step2[5] * cospi_12_64 - step2[6] * cospi_20_64;
+  temp2 = step2[5] * cospi_20_64 + step2[6] * cospi_12_64;
+  step1[5] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[6] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  step1[8] = WRAPLOW(step2[8] + step2[9], bd);
+  step1[9] = WRAPLOW(step2[8] - step2[9], bd);
+  step1[10] = WRAPLOW(-step2[10] + step2[11], bd);
+  step1[11] = WRAPLOW(step2[10] + step2[11], bd);
+  step1[12] = WRAPLOW(step2[12] + step2[13], bd);
+  step1[13] = WRAPLOW(step2[12] - step2[13], bd);
+  step1[14] = WRAPLOW(-step2[14] + step2[15], bd);
+  step1[15] = WRAPLOW(step2[14] + step2[15], bd);
+
+  // stage 4
+  temp1 = (step1[0] + step1[1]) * cospi_16_64;
+  temp2 = (step1[0] - step1[1]) * cospi_16_64;
+  step2[0] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[1] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  temp1 = step1[2] * cospi_24_64 - step1[3] * cospi_8_64;
+  temp2 = step1[2] * cospi_8_64 + step1[3] * cospi_24_64;
+  step2[2] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[3] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  step2[4] = WRAPLOW(step1[4] + step1[5], bd);
+  step2[5] = WRAPLOW(step1[4] - step1[5], bd);
+  step2[6] = WRAPLOW(-step1[6] + step1[7], bd);
+  step2[7] = WRAPLOW(step1[6] + step1[7], bd);
+
+  step2[8] = step1[8];
+  step2[15] = step1[15];
+  temp1 = -step1[9] * cospi_8_64 + step1[14] * cospi_24_64;
+  temp2 = step1[9] * cospi_24_64 + step1[14] * cospi_8_64;
+  step2[9] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[14] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  temp1 = -step1[10] * cospi_24_64 - step1[13] * cospi_8_64;
+  temp2 = -step1[10] * cospi_8_64 + step1[13] * cospi_24_64;
+  step2[10] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[13] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  step2[11] = step1[11];
+  step2[12] = step1[12];
+
+  // stage 5
+  step1[0] = WRAPLOW(step2[0] + step2[3], bd);
+  step1[1] = WRAPLOW(step2[1] + step2[2], bd);
+  step1[2] = WRAPLOW(step2[1] - step2[2], bd);
+  step1[3] = WRAPLOW(step2[0] - step2[3], bd);
+  step1[4] = step2[4];
+  temp1 = (step2[6] - step2[5]) * cospi_16_64;
+  temp2 = (step2[5] + step2[6]) * cospi_16_64;
+  step1[5] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[6] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  step1[7] = step2[7];
+
+  step1[8] = WRAPLOW(step2[8] + step2[11], bd);
+  step1[9] = WRAPLOW(step2[9] + step2[10], bd);
+  step1[10] = WRAPLOW(step2[9] - step2[10], bd);
+  step1[11] = WRAPLOW(step2[8] - step2[11], bd);
+  step1[12] = WRAPLOW(-step2[12] + step2[15], bd);
+  step1[13] = WRAPLOW(-step2[13] + step2[14], bd);
+  step1[14] = WRAPLOW(step2[13] + step2[14], bd);
+  step1[15] = WRAPLOW(step2[12] + step2[15], bd);
+
+  // stage 6
+  step2[0] = WRAPLOW(step1[0] + step1[7], bd);
+  step2[1] = WRAPLOW(step1[1] + step1[6], bd);
+  step2[2] = WRAPLOW(step1[2] + step1[5], bd);
+  step2[3] = WRAPLOW(step1[3] + step1[4], bd);
+  step2[4] = WRAPLOW(step1[3] - step1[4], bd);
+  step2[5] = WRAPLOW(step1[2] - step1[5], bd);
+  step2[6] = WRAPLOW(step1[1] - step1[6], bd);
+  step2[7] = WRAPLOW(step1[0] - step1[7], bd);
+  step2[8] = step1[8];
+  step2[9] = step1[9];
+  temp1 = (-step1[10] + step1[13]) * cospi_16_64;
+  temp2 = (step1[10] + step1[13]) * cospi_16_64;
+  step2[10] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[13] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  temp1 = (-step1[11] + step1[12]) * cospi_16_64;
+  temp2 = (step1[11] + step1[12]) * cospi_16_64;
+  step2[11] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[12] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  step2[14] = step1[14];
+  step2[15] = step1[15];
+
+  // stage 7
+  output[0] = WRAPLOW(step2[0] + step2[15], bd);
+  output[1] = WRAPLOW(step2[1] + step2[14], bd);
+  output[2] = WRAPLOW(step2[2] + step2[13], bd);
+  output[3] = WRAPLOW(step2[3] + step2[12], bd);
+  output[4] = WRAPLOW(step2[4] + step2[11], bd);
+  output[5] = WRAPLOW(step2[5] + step2[10], bd);
+  output[6] = WRAPLOW(step2[6] + step2[9], bd);
+  output[7] = WRAPLOW(step2[7] + step2[8], bd);
+  output[8] = WRAPLOW(step2[7] - step2[8], bd);
+  output[9] = WRAPLOW(step2[6] - step2[9], bd);
+  output[10] = WRAPLOW(step2[5] - step2[10], bd);
+  output[11] = WRAPLOW(step2[4] - step2[11], bd);
+  output[12] = WRAPLOW(step2[3] - step2[12], bd);
+  output[13] = WRAPLOW(step2[2] - step2[13], bd);
+  output[14] = WRAPLOW(step2[1] - step2[14], bd);
+  output[15] = WRAPLOW(step2[0] - step2[15], bd);
+}
+
+void vp9_highbd_idct16x16_256_add_c(const tran_low_t *input, uint8_t *dest8,
+                                    int stride, int bd) {
+  tran_low_t out[16 * 16];
+  tran_low_t *outptr = out;
+  int i, j;
+  tran_low_t temp_in[16], temp_out[16];
+  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
+
+  // First transform rows.
+  for (i = 0; i < 16; ++i) {
+    vp9_highbd_idct16_c(input, outptr, bd);
+    input += 16;
+    outptr += 16;
+  }
+
+  // Then transform columns.
+  for (i = 0; i < 16; ++i) {
+    for (j = 0; j < 16; ++j)
+      temp_in[j] = out[j * 16 + i];
+    vp9_highbd_idct16_c(temp_in, temp_out, bd);
+    for (j = 0; j < 16; ++j) {
+      dest[j * stride + i] = highbd_clip_pixel_add(
+          dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 6), bd);
+    }
+  }
+}
+
+void highbd_iadst16_c(const tran_low_t *input, tran_low_t *output, int bd) {
+  tran_high_t s0, s1, s2, s3, s4, s5, s6, s7, s8;
+  tran_high_t s9, s10, s11, s12, s13, s14, s15;
+
+  tran_low_t x0 = input[15];
+  tran_low_t x1 = input[0];
+  tran_low_t x2 = input[13];
+  tran_low_t x3 = input[2];
+  tran_low_t x4 = input[11];
+  tran_low_t x5 = input[4];
+  tran_low_t x6 = input[9];
+  tran_low_t x7 = input[6];
+  tran_low_t x8 = input[7];
+  tran_low_t x9 = input[8];
+  tran_low_t x10 = input[5];
+  tran_low_t x11 = input[10];
+  tran_low_t x12 = input[3];
+  tran_low_t x13 = input[12];
+  tran_low_t x14 = input[1];
+  tran_low_t x15 = input[14];
+  (void) bd;
+
+  if (!(x0 | x1 | x2 | x3 | x4 | x5 | x6 | x7 | x8
+           | x9 | x10 | x11 | x12 | x13 | x14 | x15)) {
+    memset(output, 0, 16 * sizeof(*output));
+    return;
+  }
+
+  // stage 1
+  s0 = x0 * cospi_1_64  + x1 * cospi_31_64;
+  s1 = x0 * cospi_31_64 - x1 * cospi_1_64;
+  s2 = x2 * cospi_5_64  + x3 * cospi_27_64;
+  s3 = x2 * cospi_27_64 - x3 * cospi_5_64;
+  s4 = x4 * cospi_9_64  + x5 * cospi_23_64;
+  s5 = x4 * cospi_23_64 - x5 * cospi_9_64;
+  s6 = x6 * cospi_13_64 + x7 * cospi_19_64;
+  s7 = x6 * cospi_19_64 - x7 * cospi_13_64;
+  s8 = x8 * cospi_17_64 + x9 * cospi_15_64;
+  s9 = x8 * cospi_15_64 - x9 * cospi_17_64;
+  s10 = x10 * cospi_21_64 + x11 * cospi_11_64;
+  s11 = x10 * cospi_11_64 - x11 * cospi_21_64;
+  s12 = x12 * cospi_25_64 + x13 * cospi_7_64;
+  s13 = x12 * cospi_7_64  - x13 * cospi_25_64;
+  s14 = x14 * cospi_29_64 + x15 * cospi_3_64;
+  s15 = x14 * cospi_3_64  - x15 * cospi_29_64;
+
+  x0 = WRAPLOW(highbd_dct_const_round_shift(s0 + s8, bd), bd);
+  x1 = WRAPLOW(highbd_dct_const_round_shift(s1 + s9, bd), bd);
+  x2 = WRAPLOW(highbd_dct_const_round_shift(s2 + s10, bd), bd);
+  x3 = WRAPLOW(highbd_dct_const_round_shift(s3 + s11, bd), bd);
+  x4 = WRAPLOW(highbd_dct_const_round_shift(s4 + s12, bd), bd);
+  x5 = WRAPLOW(highbd_dct_const_round_shift(s5 + s13, bd), bd);
+  x6 = WRAPLOW(highbd_dct_const_round_shift(s6 + s14, bd), bd);
+  x7 = WRAPLOW(highbd_dct_const_round_shift(s7 + s15, bd), bd);
+  x8  = WRAPLOW(highbd_dct_const_round_shift(s0 - s8, bd), bd);
+  x9  = WRAPLOW(highbd_dct_const_round_shift(s1 - s9, bd), bd);
+  x10 = WRAPLOW(highbd_dct_const_round_shift(s2 - s10, bd), bd);
+  x11 = WRAPLOW(highbd_dct_const_round_shift(s3 - s11, bd), bd);
+  x12 = WRAPLOW(highbd_dct_const_round_shift(s4 - s12, bd), bd);
+  x13 = WRAPLOW(highbd_dct_const_round_shift(s5 - s13, bd), bd);
+  x14 = WRAPLOW(highbd_dct_const_round_shift(s6 - s14, bd), bd);
+  x15 = WRAPLOW(highbd_dct_const_round_shift(s7 - s15, bd), bd);
+
+  // stage 2
+  s0 = x0;
+  s1 = x1;
+  s2 = x2;
+  s3 = x3;
+  s4 = x4;
+  s5 = x5;
+  s6 = x6;
+  s7 = x7;
+  s8 = x8 * cospi_4_64 + x9 * cospi_28_64;
+  s9 = x8 * cospi_28_64 - x9 * cospi_4_64;
+  s10 = x10 * cospi_20_64 + x11 * cospi_12_64;
+  s11 = x10 * cospi_12_64 - x11 * cospi_20_64;
+  s12 = -x12 * cospi_28_64 + x13 * cospi_4_64;
+  s13 = x12 * cospi_4_64 + x13 * cospi_28_64;
+  s14 = -x14 * cospi_12_64 + x15 * cospi_20_64;
+  s15 = x14 * cospi_20_64 + x15 * cospi_12_64;
+
+  x0 = WRAPLOW(s0 + s4, bd);
+  x1 = WRAPLOW(s1 + s5, bd);
+  x2 = WRAPLOW(s2 + s6, bd);
+  x3 = WRAPLOW(s3 + s7, bd);
+  x4 = WRAPLOW(s0 - s4, bd);
+  x5 = WRAPLOW(s1 - s5, bd);
+  x6 = WRAPLOW(s2 - s6, bd);
+  x7 = WRAPLOW(s3 - s7, bd);
+  x8 = WRAPLOW(highbd_dct_const_round_shift(s8 + s12, bd), bd);
+  x9 = WRAPLOW(highbd_dct_const_round_shift(s9 + s13, bd), bd);
+  x10 = WRAPLOW(highbd_dct_const_round_shift(s10 + s14, bd), bd);
+  x11 = WRAPLOW(highbd_dct_const_round_shift(s11 + s15, bd), bd);
+  x12 = WRAPLOW(highbd_dct_const_round_shift(s8 - s12, bd), bd);
+  x13 = WRAPLOW(highbd_dct_const_round_shift(s9 - s13, bd), bd);
+  x14 = WRAPLOW(highbd_dct_const_round_shift(s10 - s14, bd), bd);
+  x15 = WRAPLOW(highbd_dct_const_round_shift(s11 - s15, bd), bd);
+
+  // stage 3
+  s0 = x0;
+  s1 = x1;
+  s2 = x2;
+  s3 = x3;
+  s4 = x4 * cospi_8_64 + x5 * cospi_24_64;
+  s5 = x4 * cospi_24_64 - x5 * cospi_8_64;
+  s6 = -x6 * cospi_24_64 + x7 * cospi_8_64;
+  s7 = x6 * cospi_8_64 + x7 * cospi_24_64;
+  s8 = x8;
+  s9 = x9;
+  s10 = x10;
+  s11 = x11;
+  s12 = x12 * cospi_8_64 + x13 * cospi_24_64;
+  s13 = x12 * cospi_24_64 - x13 * cospi_8_64;
+  s14 = -x14 * cospi_24_64 + x15 * cospi_8_64;
+  s15 = x14 * cospi_8_64 + x15 * cospi_24_64;
+
+  x0 = WRAPLOW(s0 + s2, bd);
+  x1 = WRAPLOW(s1 + s3, bd);
+  x2 = WRAPLOW(s0 - s2, bd);
+  x3 = WRAPLOW(s1 - s3, bd);
+  x4 = WRAPLOW(highbd_dct_const_round_shift(s4 + s6, bd), bd);
+  x5 = WRAPLOW(highbd_dct_const_round_shift(s5 + s7, bd), bd);
+  x6 = WRAPLOW(highbd_dct_const_round_shift(s4 - s6, bd), bd);
+  x7 = WRAPLOW(highbd_dct_const_round_shift(s5 - s7, bd), bd);
+  x8 = WRAPLOW(s8 + s10, bd);
+  x9 = WRAPLOW(s9 + s11, bd);
+  x10 = WRAPLOW(s8 - s10, bd);
+  x11 = WRAPLOW(s9 - s11, bd);
+  x12 = WRAPLOW(highbd_dct_const_round_shift(s12 + s14, bd), bd);
+  x13 = WRAPLOW(highbd_dct_const_round_shift(s13 + s15, bd), bd);
+  x14 = WRAPLOW(highbd_dct_const_round_shift(s12 - s14, bd), bd);
+  x15 = WRAPLOW(highbd_dct_const_round_shift(s13 - s15, bd), bd);
+
+  // stage 4
+  s2 = (- cospi_16_64) * (x2 + x3);
+  s3 = cospi_16_64 * (x2 - x3);
+  s6 = cospi_16_64 * (x6 + x7);
+  s7 = cospi_16_64 * (-x6 + x7);
+  s10 = cospi_16_64 * (x10 + x11);
+  s11 = cospi_16_64 * (-x10 + x11);
+  s14 = (- cospi_16_64) * (x14 + x15);
+  s15 = cospi_16_64 * (x14 - x15);
+
+  x2 = WRAPLOW(highbd_dct_const_round_shift(s2, bd), bd);
+  x3 = WRAPLOW(highbd_dct_const_round_shift(s3, bd), bd);
+  x6 = WRAPLOW(highbd_dct_const_round_shift(s6, bd), bd);
+  x7 = WRAPLOW(highbd_dct_const_round_shift(s7, bd), bd);
+  x10 = WRAPLOW(highbd_dct_const_round_shift(s10, bd), bd);
+  x11 = WRAPLOW(highbd_dct_const_round_shift(s11, bd), bd);
+  x14 = WRAPLOW(highbd_dct_const_round_shift(s14, bd), bd);
+  x15 = WRAPLOW(highbd_dct_const_round_shift(s15, bd), bd);
+
+  output[0] = WRAPLOW(x0, bd);
+  output[1] = WRAPLOW(-x8, bd);
+  output[2] = WRAPLOW(x12, bd);
+  output[3] = WRAPLOW(-x4, bd);
+  output[4] = WRAPLOW(x6, bd);
+  output[5] = WRAPLOW(x14, bd);
+  output[6] = WRAPLOW(x10, bd);
+  output[7] = WRAPLOW(x2, bd);
+  output[8] = WRAPLOW(x3, bd);
+  output[9] = WRAPLOW(x11, bd);
+  output[10] = WRAPLOW(x15, bd);
+  output[11] = WRAPLOW(x7, bd);
+  output[12] = WRAPLOW(x5, bd);
+  output[13] = WRAPLOW(-x13, bd);
+  output[14] = WRAPLOW(x9, bd);
+  output[15] = WRAPLOW(-x1, bd);
+}
+
+void vp9_highbd_idct16x16_10_add_c(const tran_low_t *input, uint8_t *dest8,
+                                   int stride, int bd) {
+  tran_low_t out[16 * 16] = { 0 };
+  tran_low_t *outptr = out;
+  int i, j;
+  tran_low_t temp_in[16], temp_out[16];
+  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
+
+  // First transform rows. Since all non-zero dct coefficients are in
+  // upper-left 4x4 area, we only need to calculate first 4 rows here.
+  for (i = 0; i < 4; ++i) {
+    vp9_highbd_idct16_c(input, outptr, bd);
+    input += 16;
+    outptr += 16;
+  }
+
+  // Then transform columns.
+  for (i = 0; i < 16; ++i) {
+    for (j = 0; j < 16; ++j)
+      temp_in[j] = out[j*16 + i];
+    vp9_highbd_idct16_c(temp_in, temp_out, bd);
+    for (j = 0; j < 16; ++j) {
+      dest[j * stride + i] = highbd_clip_pixel_add(
+          dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 6), bd);
+    }
+  }
+}
+
+void vp9_highbd_idct16x16_1_add_c(const tran_low_t *input, uint8_t *dest8,
+                                  int stride, int bd) {
+  int i, j;
+  tran_high_t a1;
+  tran_low_t out = WRAPLOW(
+      highbd_dct_const_round_shift(input[0] * cospi_16_64, bd), bd);
+  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
+
+  out = WRAPLOW(highbd_dct_const_round_shift(out * cospi_16_64, bd), bd);
+  a1 = ROUND_POWER_OF_TWO(out, 6);
+  for (j = 0; j < 16; ++j) {
+    for (i = 0; i < 16; ++i)
+      dest[i] = highbd_clip_pixel_add(dest[i], a1, bd);
+    dest += stride;
+  }
+}
+
+void highbd_idct32_c(const tran_low_t *input, tran_low_t *output, int bd) {
+  tran_low_t step1[32], step2[32];
+  tran_high_t temp1, temp2;
+  (void) bd;
+
+  // stage 1
+  step1[0] = input[0];
+  step1[1] = input[16];
+  step1[2] = input[8];
+  step1[3] = input[24];
+  step1[4] = input[4];
+  step1[5] = input[20];
+  step1[6] = input[12];
+  step1[7] = input[28];
+  step1[8] = input[2];
+  step1[9] = input[18];
+  step1[10] = input[10];
+  step1[11] = input[26];
+  step1[12] = input[6];
+  step1[13] = input[22];
+  step1[14] = input[14];
+  step1[15] = input[30];
+
+  temp1 = input[1] * cospi_31_64 - input[31] * cospi_1_64;
+  temp2 = input[1] * cospi_1_64 + input[31] * cospi_31_64;
+  step1[16] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[31] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  temp1 = input[17] * cospi_15_64 - input[15] * cospi_17_64;
+  temp2 = input[17] * cospi_17_64 + input[15] * cospi_15_64;
+  step1[17] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[30] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  temp1 = input[9] * cospi_23_64 - input[23] * cospi_9_64;
+  temp2 = input[9] * cospi_9_64 + input[23] * cospi_23_64;
+  step1[18] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[29] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  temp1 = input[25] * cospi_7_64 - input[7] * cospi_25_64;
+  temp2 = input[25] * cospi_25_64 + input[7] * cospi_7_64;
+  step1[19] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[28] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  temp1 = input[5] * cospi_27_64 - input[27] * cospi_5_64;
+  temp2 = input[5] * cospi_5_64 + input[27] * cospi_27_64;
+  step1[20] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[27] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  temp1 = input[21] * cospi_11_64 - input[11] * cospi_21_64;
+  temp2 = input[21] * cospi_21_64 + input[11] * cospi_11_64;
+  step1[21] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[26] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  temp1 = input[13] * cospi_19_64 - input[19] * cospi_13_64;
+  temp2 = input[13] * cospi_13_64 + input[19] * cospi_19_64;
+  step1[22] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[25] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  temp1 = input[29] * cospi_3_64 - input[3] * cospi_29_64;
+  temp2 = input[29] * cospi_29_64 + input[3] * cospi_3_64;
+  step1[23] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[24] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  // stage 2
+  step2[0] = step1[0];
+  step2[1] = step1[1];
+  step2[2] = step1[2];
+  step2[3] = step1[3];
+  step2[4] = step1[4];
+  step2[5] = step1[5];
+  step2[6] = step1[6];
+  step2[7] = step1[7];
+
+  temp1 = step1[8] * cospi_30_64 - step1[15] * cospi_2_64;
+  temp2 = step1[8] * cospi_2_64 + step1[15] * cospi_30_64;
+  step2[8] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[15] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  temp1 = step1[9] * cospi_14_64 - step1[14] * cospi_18_64;
+  temp2 = step1[9] * cospi_18_64 + step1[14] * cospi_14_64;
+  step2[9] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[14] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  temp1 = step1[10] * cospi_22_64 - step1[13] * cospi_10_64;
+  temp2 = step1[10] * cospi_10_64 + step1[13] * cospi_22_64;
+  step2[10] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[13] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  temp1 = step1[11] * cospi_6_64 - step1[12] * cospi_26_64;
+  temp2 = step1[11] * cospi_26_64 + step1[12] * cospi_6_64;
+  step2[11] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[12] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  step2[16] = WRAPLOW(step1[16] + step1[17], bd);
+  step2[17] = WRAPLOW(step1[16] - step1[17], bd);
+  step2[18] = WRAPLOW(-step1[18] + step1[19], bd);
+  step2[19] = WRAPLOW(step1[18] + step1[19], bd);
+  step2[20] = WRAPLOW(step1[20] + step1[21], bd);
+  step2[21] = WRAPLOW(step1[20] - step1[21], bd);
+  step2[22] = WRAPLOW(-step1[22] + step1[23], bd);
+  step2[23] = WRAPLOW(step1[22] + step1[23], bd);
+  step2[24] = WRAPLOW(step1[24] + step1[25], bd);
+  step2[25] = WRAPLOW(step1[24] - step1[25], bd);
+  step2[26] = WRAPLOW(-step1[26] + step1[27], bd);
+  step2[27] = WRAPLOW(step1[26] + step1[27], bd);
+  step2[28] = WRAPLOW(step1[28] + step1[29], bd);
+  step2[29] = WRAPLOW(step1[28] - step1[29], bd);
+  step2[30] = WRAPLOW(-step1[30] + step1[31], bd);
+  step2[31] = WRAPLOW(step1[30] + step1[31], bd);
+
+  // stage 3
+  step1[0] = step2[0];
+  step1[1] = step2[1];
+  step1[2] = step2[2];
+  step1[3] = step2[3];
+
+  temp1 = step2[4] * cospi_28_64 - step2[7] * cospi_4_64;
+  temp2 = step2[4] * cospi_4_64 + step2[7] * cospi_28_64;
+  step1[4] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[7] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  temp1 = step2[5] * cospi_12_64 - step2[6] * cospi_20_64;
+  temp2 = step2[5] * cospi_20_64 + step2[6] * cospi_12_64;
+  step1[5] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[6] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+
+  step1[8] = WRAPLOW(step2[8] + step2[9], bd);
+  step1[9] = WRAPLOW(step2[8] - step2[9], bd);
+  step1[10] = WRAPLOW(-step2[10] + step2[11], bd);
+  step1[11] = WRAPLOW(step2[10] + step2[11], bd);
+  step1[12] = WRAPLOW(step2[12] + step2[13], bd);
+  step1[13] = WRAPLOW(step2[12] - step2[13], bd);
+  step1[14] = WRAPLOW(-step2[14] + step2[15], bd);
+  step1[15] = WRAPLOW(step2[14] + step2[15], bd);
+
+  step1[16] = step2[16];
+  step1[31] = step2[31];
+  temp1 = -step2[17] * cospi_4_64 + step2[30] * cospi_28_64;
+  temp2 = step2[17] * cospi_28_64 + step2[30] * cospi_4_64;
+  step1[17] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[30] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  temp1 = -step2[18] * cospi_28_64 - step2[29] * cospi_4_64;
+  temp2 = -step2[18] * cospi_4_64 + step2[29] * cospi_28_64;
+  step1[18] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[29] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  step1[19] = step2[19];
+  step1[20] = step2[20];
+  temp1 = -step2[21] * cospi_20_64 + step2[26] * cospi_12_64;
+  temp2 = step2[21] * cospi_12_64 + step2[26] * cospi_20_64;
+  step1[21] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[26] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  temp1 = -step2[22] * cospi_12_64 - step2[25] * cospi_20_64;
+  temp2 = -step2[22] * cospi_20_64 + step2[25] * cospi_12_64;
+  step1[22] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[25] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  step1[23] = step2[23];
+  step1[24] = step2[24];
+  step1[27] = step2[27];
+  step1[28] = step2[28];
+
+  // stage 4
+  temp1 = (step1[0] + step1[1]) * cospi_16_64;
+  temp2 = (step1[0] - step1[1]) * cospi_16_64;
+  step2[0] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[1] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  temp1 = step1[2] * cospi_24_64 - step1[3] * cospi_8_64;
+  temp2 = step1[2] * cospi_8_64 + step1[3] * cospi_24_64;
+  step2[2] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[3] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  step2[4] = WRAPLOW(step1[4] + step1[5], bd);
+  step2[5] = WRAPLOW(step1[4] - step1[5], bd);
+  step2[6] = WRAPLOW(-step1[6] + step1[7], bd);
+  step2[7] = WRAPLOW(step1[6] + step1[7], bd);
+
+  step2[8] = step1[8];
+  step2[15] = step1[15];
+  temp1 = -step1[9] * cospi_8_64 + step1[14] * cospi_24_64;
+  temp2 = step1[9] * cospi_24_64 + step1[14] * cospi_8_64;
+  step2[9] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[14] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  temp1 = -step1[10] * cospi_24_64 - step1[13] * cospi_8_64;
+  temp2 = -step1[10] * cospi_8_64 + step1[13] * cospi_24_64;
+  step2[10] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[13] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  step2[11] = step1[11];
+  step2[12] = step1[12];
+
+  step2[16] = WRAPLOW(step1[16] + step1[19], bd);
+  step2[17] = WRAPLOW(step1[17] + step1[18], bd);
+  step2[18] = WRAPLOW(step1[17] - step1[18], bd);
+  step2[19] = WRAPLOW(step1[16] - step1[19], bd);
+  step2[20] = WRAPLOW(-step1[20] + step1[23], bd);
+  step2[21] = WRAPLOW(-step1[21] + step1[22], bd);
+  step2[22] = WRAPLOW(step1[21] + step1[22], bd);
+  step2[23] = WRAPLOW(step1[20] + step1[23], bd);
+
+  step2[24] = WRAPLOW(step1[24] + step1[27], bd);
+  step2[25] = WRAPLOW(step1[25] + step1[26], bd);
+  step2[26] = WRAPLOW(step1[25] - step1[26], bd);
+  step2[27] = WRAPLOW(step1[24] - step1[27], bd);
+  step2[28] = WRAPLOW(-step1[28] + step1[31], bd);
+  step2[29] = WRAPLOW(-step1[29] + step1[30], bd);
+  step2[30] = WRAPLOW(step1[29] + step1[30], bd);
+  step2[31] = WRAPLOW(step1[28] + step1[31], bd);
+
+  // stage 5
+  step1[0] = WRAPLOW(step2[0] + step2[3], bd);
+  step1[1] = WRAPLOW(step2[1] + step2[2], bd);
+  step1[2] = WRAPLOW(step2[1] - step2[2], bd);
+  step1[3] = WRAPLOW(step2[0] - step2[3], bd);
+  step1[4] = step2[4];
+  temp1 = (step2[6] - step2[5]) * cospi_16_64;
+  temp2 = (step2[5] + step2[6]) * cospi_16_64;
+  step1[5] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[6] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  step1[7] = step2[7];
+
+  step1[8] = WRAPLOW(step2[8] + step2[11], bd);
+  step1[9] = WRAPLOW(step2[9] + step2[10], bd);
+  step1[10] = WRAPLOW(step2[9] - step2[10], bd);
+  step1[11] = WRAPLOW(step2[8] - step2[11], bd);
+  step1[12] = WRAPLOW(-step2[12] + step2[15], bd);
+  step1[13] = WRAPLOW(-step2[13] + step2[14], bd);
+  step1[14] = WRAPLOW(step2[13] + step2[14], bd);
+  step1[15] = WRAPLOW(step2[12] + step2[15], bd);
+
+  step1[16] = step2[16];
+  step1[17] = step2[17];
+  temp1 = -step2[18] * cospi_8_64 + step2[29] * cospi_24_64;
+  temp2 = step2[18] * cospi_24_64 + step2[29] * cospi_8_64;
+  step1[18] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[29] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  temp1 = -step2[19] * cospi_8_64 + step2[28] * cospi_24_64;
+  temp2 = step2[19] * cospi_24_64 + step2[28] * cospi_8_64;
+  step1[19] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[28] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  temp1 = -step2[20] * cospi_24_64 - step2[27] * cospi_8_64;
+  temp2 = -step2[20] * cospi_8_64 + step2[27] * cospi_24_64;
+  step1[20] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[27] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  temp1 = -step2[21] * cospi_24_64 - step2[26] * cospi_8_64;
+  temp2 = -step2[21] * cospi_8_64 + step2[26] * cospi_24_64;
+  step1[21] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[26] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  step1[22] = step2[22];
+  step1[23] = step2[23];
+  step1[24] = step2[24];
+  step1[25] = step2[25];
+  step1[30] = step2[30];
+  step1[31] = step2[31];
+
+  // stage 6
+  step2[0] = WRAPLOW(step1[0] + step1[7], bd);
+  step2[1] = WRAPLOW(step1[1] + step1[6], bd);
+  step2[2] = WRAPLOW(step1[2] + step1[5], bd);
+  step2[3] = WRAPLOW(step1[3] + step1[4], bd);
+  step2[4] = WRAPLOW(step1[3] - step1[4], bd);
+  step2[5] = WRAPLOW(step1[2] - step1[5], bd);
+  step2[6] = WRAPLOW(step1[1] - step1[6], bd);
+  step2[7] = WRAPLOW(step1[0] - step1[7], bd);
+  step2[8] = step1[8];
+  step2[9] = step1[9];
+  temp1 = (-step1[10] + step1[13]) * cospi_16_64;
+  temp2 = (step1[10] + step1[13]) * cospi_16_64;
+  step2[10] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[13] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  temp1 = (-step1[11] + step1[12]) * cospi_16_64;
+  temp2 = (step1[11] + step1[12]) * cospi_16_64;
+  step2[11] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step2[12] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  step2[14] = step1[14];
+  step2[15] = step1[15];
+
+  step2[16] = WRAPLOW(step1[16] + step1[23], bd);
+  step2[17] = WRAPLOW(step1[17] + step1[22], bd);
+  step2[18] = WRAPLOW(step1[18] + step1[21], bd);
+  step2[19] = WRAPLOW(step1[19] + step1[20], bd);
+  step2[20] = WRAPLOW(step1[19] - step1[20], bd);
+  step2[21] = WRAPLOW(step1[18] - step1[21], bd);
+  step2[22] = WRAPLOW(step1[17] - step1[22], bd);
+  step2[23] = WRAPLOW(step1[16] - step1[23], bd);
+
+  step2[24] = WRAPLOW(-step1[24] + step1[31], bd);
+  step2[25] = WRAPLOW(-step1[25] + step1[30], bd);
+  step2[26] = WRAPLOW(-step1[26] + step1[29], bd);
+  step2[27] = WRAPLOW(-step1[27] + step1[28], bd);
+  step2[28] = WRAPLOW(step1[27] + step1[28], bd);
+  step2[29] = WRAPLOW(step1[26] + step1[29], bd);
+  step2[30] = WRAPLOW(step1[25] + step1[30], bd);
+  step2[31] = WRAPLOW(step1[24] + step1[31], bd);
+
+  // stage 7
+  step1[0] = WRAPLOW(step2[0] + step2[15], bd);
+  step1[1] = WRAPLOW(step2[1] + step2[14], bd);
+  step1[2] = WRAPLOW(step2[2] + step2[13], bd);
+  step1[3] = WRAPLOW(step2[3] + step2[12], bd);
+  step1[4] = WRAPLOW(step2[4] + step2[11], bd);
+  step1[5] = WRAPLOW(step2[5] + step2[10], bd);
+  step1[6] = WRAPLOW(step2[6] + step2[9], bd);
+  step1[7] = WRAPLOW(step2[7] + step2[8], bd);
+  step1[8] = WRAPLOW(step2[7] - step2[8], bd);
+  step1[9] = WRAPLOW(step2[6] - step2[9], bd);
+  step1[10] = WRAPLOW(step2[5] - step2[10], bd);
+  step1[11] = WRAPLOW(step2[4] - step2[11], bd);
+  step1[12] = WRAPLOW(step2[3] - step2[12], bd);
+  step1[13] = WRAPLOW(step2[2] - step2[13], bd);
+  step1[14] = WRAPLOW(step2[1] - step2[14], bd);
+  step1[15] = WRAPLOW(step2[0] - step2[15], bd);
+
+  step1[16] = step2[16];
+  step1[17] = step2[17];
+  step1[18] = step2[18];
+  step1[19] = step2[19];
+  temp1 = (-step2[20] + step2[27]) * cospi_16_64;
+  temp2 = (step2[20] + step2[27]) * cospi_16_64;
+  step1[20] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[27] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  temp1 = (-step2[21] + step2[26]) * cospi_16_64;
+  temp2 = (step2[21] + step2[26]) * cospi_16_64;
+  step1[21] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[26] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  temp1 = (-step2[22] + step2[25]) * cospi_16_64;
+  temp2 = (step2[22] + step2[25]) * cospi_16_64;
+  step1[22] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[25] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  temp1 = (-step2[23] + step2[24]) * cospi_16_64;
+  temp2 = (step2[23] + step2[24]) * cospi_16_64;
+  step1[23] = WRAPLOW(highbd_dct_const_round_shift(temp1, bd), bd);
+  step1[24] = WRAPLOW(highbd_dct_const_round_shift(temp2, bd), bd);
+  step1[28] = step2[28];
+  step1[29] = step2[29];
+  step1[30] = step2[30];
+  step1[31] = step2[31];
+
+  // final stage
+  output[0] = WRAPLOW(step1[0] + step1[31], bd);
+  output[1] = WRAPLOW(step1[1] + step1[30], bd);
+  output[2] = WRAPLOW(step1[2] + step1[29], bd);
+  output[3] = WRAPLOW(step1[3] + step1[28], bd);
+  output[4] = WRAPLOW(step1[4] + step1[27], bd);
+  output[5] = WRAPLOW(step1[5] + step1[26], bd);
+  output[6] = WRAPLOW(step1[6] + step1[25], bd);
+  output[7] = WRAPLOW(step1[7] + step1[24], bd);
+  output[8] = WRAPLOW(step1[8] + step1[23], bd);
+  output[9] = WRAPLOW(step1[9] + step1[22], bd);
+  output[10] = WRAPLOW(step1[10] + step1[21], bd);
+  output[11] = WRAPLOW(step1[11] + step1[20], bd);
+  output[12] = WRAPLOW(step1[12] + step1[19], bd);
+  output[13] = WRAPLOW(step1[13] + step1[18], bd);
+  output[14] = WRAPLOW(step1[14] + step1[17], bd);
+  output[15] = WRAPLOW(step1[15] + step1[16], bd);
+  output[16] = WRAPLOW(step1[15] - step1[16], bd);
+  output[17] = WRAPLOW(step1[14] - step1[17], bd);
+  output[18] = WRAPLOW(step1[13] - step1[18], bd);
+  output[19] = WRAPLOW(step1[12] - step1[19], bd);
+  output[20] = WRAPLOW(step1[11] - step1[20], bd);
+  output[21] = WRAPLOW(step1[10] - step1[21], bd);
+  output[22] = WRAPLOW(step1[9] - step1[22], bd);
+  output[23] = WRAPLOW(step1[8] - step1[23], bd);
+  output[24] = WRAPLOW(step1[7] - step1[24], bd);
+  output[25] = WRAPLOW(step1[6] - step1[25], bd);
+  output[26] = WRAPLOW(step1[5] - step1[26], bd);
+  output[27] = WRAPLOW(step1[4] - step1[27], bd);
+  output[28] = WRAPLOW(step1[3] - step1[28], bd);
+  output[29] = WRAPLOW(step1[2] - step1[29], bd);
+  output[30] = WRAPLOW(step1[1] - step1[30], bd);
+  output[31] = WRAPLOW(step1[0] - step1[31], bd);
+}
+
+void vp9_highbd_idct32x32_1024_add_c(const tran_low_t *input, uint8_t *dest8,
+                                     int stride, int bd) {
+  tran_low_t out[32 * 32];
+  tran_low_t *outptr = out;
+  int i, j;
+  tran_low_t temp_in[32], temp_out[32];
+  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
+
+  // Rows
+  for (i = 0; i < 32; ++i) {
+    tran_low_t zero_coeff[16];
+    for (j = 0; j < 16; ++j)
+      zero_coeff[j] = input[2 * j] | input[2 * j + 1];
+    for (j = 0; j < 8; ++j)
+      zero_coeff[j] = zero_coeff[2 * j] | zero_coeff[2 * j + 1];
+    for (j = 0; j < 4; ++j)
+      zero_coeff[j] = zero_coeff[2 * j] | zero_coeff[2 * j + 1];
+    for (j = 0; j < 2; ++j)
+      zero_coeff[j] = zero_coeff[2 * j] | zero_coeff[2 * j + 1];
+
+    if (zero_coeff[0] | zero_coeff[1])
+      highbd_idct32_c(input, outptr, bd);
+    else
+      memset(outptr, 0, sizeof(tran_low_t) * 32);
+    input += 32;
+    outptr += 32;
+  }
+
+  // Columns
+  for (i = 0; i < 32; ++i) {
+    for (j = 0; j < 32; ++j)
+      temp_in[j] = out[j * 32 + i];
+    highbd_idct32_c(temp_in, temp_out, bd);
+    for (j = 0; j < 32; ++j) {
+      dest[j * stride + i] = highbd_clip_pixel_add(
+          dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 6), bd);
+    }
+  }
+}
+
+void vp9_highbd_idct32x32_34_add_c(const tran_low_t *input, uint8_t *dest8,
+                                   int stride, int bd) {
+  tran_low_t out[32 * 32] = {0};
+  tran_low_t *outptr = out;
+  int i, j;
+  tran_low_t temp_in[32], temp_out[32];
+  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
+
+  // Rows
+  // Only upper-left 8x8 has non-zero coeff.
+  for (i = 0; i < 8; ++i) {
+    highbd_idct32_c(input, outptr, bd);
+    input += 32;
+    outptr += 32;
+  }
+  // Columns
+  for (i = 0; i < 32; ++i) {
+    for (j = 0; j < 32; ++j)
+      temp_in[j] = out[j * 32 + i];
+    highbd_idct32_c(temp_in, temp_out, bd);
+    for (j = 0; j < 32; ++j) {
+      dest[j * stride + i] = highbd_clip_pixel_add(
+          dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 6), bd);
+    }
+  }
+}
+
+void vp9_highbd_idct32x32_1_add_c(const tran_low_t *input, uint8_t *dest8,
+                                  int stride, int bd) {
+  int i, j;
+  int a1;
+  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
+
+  tran_low_t out = WRAPLOW(
+      highbd_dct_const_round_shift(input[0] * cospi_16_64, bd), bd);
+  out = WRAPLOW(highbd_dct_const_round_shift(out * cospi_16_64, bd), bd);
+  a1 = ROUND_POWER_OF_TWO(out, 6);
+
+  for (j = 0; j < 32; ++j) {
+    for (i = 0; i < 32; ++i)
+      dest[i] = highbd_clip_pixel_add(dest[i], a1, bd);
+    dest += stride;
+  }
+}
+#endif  // CONFIG_VP9_HIGHBITDEPTH
diff --git a/vpx_dsp/inv_txfm.h b/vpx_dsp/inv_txfm.h
new file mode 100644
index 000000000..b11039ab8
--- /dev/null
+++ b/vpx_dsp/inv_txfm.h
@@ -0,0 +1,124 @@
+/*
+ *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef VPX_DSP_INV_TXFM_H_
+#define VPX_DSP_INV_TXFM_H_
+
+#include <assert.h>
+
+#include "./vpx_config.h"
+#include "vpx_dsp/txfm_common.h"
+#include "vpx_ports/mem.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+static INLINE tran_low_t check_range(tran_high_t input) {
+#if CONFIG_COEFFICIENT_RANGE_CHECKING
+  // For valid VP9 input streams, intermediate stage coefficients should always
+  // stay within the range of a signed 16 bit integer. Coefficients can go out
+  // of this range for invalid/corrupt VP9 streams. However, strictly checking
+  // this range for every intermediate coefficient can burdensome for a decoder,
+  // therefore the following assertion is only enabled when configured with
+  // --enable-coefficient-range-checking.
+  assert(INT16_MIN <= input);
+  assert(input <= INT16_MAX);
+#endif  // CONFIG_COEFFICIENT_RANGE_CHECKING
+  return (tran_low_t)input;
+}
+
+static INLINE tran_low_t dct_const_round_shift(tran_high_t input) {
+  tran_high_t rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS);
+  return check_range(rv);
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+static INLINE tran_low_t highbd_check_range(tran_high_t input,
+                                            int bd) {
+#if CONFIG_COEFFICIENT_RANGE_CHECKING
+  // For valid highbitdepth VP9 streams, intermediate stage coefficients will
+  // stay within the ranges:
+  // - 8 bit: signed 16 bit integer
+  // - 10 bit: signed 18 bit integer
+  // - 12 bit: signed 20 bit integer
+  const int32_t int_max = (1 << (7 + bd)) - 1;
+  const int32_t int_min = -int_max - 1;
+  assert(int_min <= input);
+  assert(input <= int_max);
+  (void) int_min;
+#endif  // CONFIG_COEFFICIENT_RANGE_CHECKING
+  (void) bd;
+  return (tran_low_t)input;
+}
+
+static INLINE tran_low_t highbd_dct_const_round_shift(tran_high_t input,
+                                                      int bd) {
+  tran_high_t rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS);
+  return highbd_check_range(rv, bd);
+}
+#endif  // CONFIG_VP9_HIGHBITDEPTH
+
+#if CONFIG_EMULATE_HARDWARE
+// When CONFIG_EMULATE_HARDWARE is 1 the transform performs a
+// non-normative method to handle overflows. A stream that causes
+// overflows  in the inverse transform is considered invalid in VP9,
+// and a hardware implementer is free to choose any reasonable
+// method to handle overflows. However to aid in hardware
+// verification they can use a specific implementation of the
+// WRAPLOW() macro below that is identical to their intended
+// hardware implementation (and also use configure options to trigger
+// the C-implementation of the transform).
+//
+// The particular WRAPLOW implementation below performs strict
+// overflow wrapping to match common hardware implementations.
+// bd of 8 uses trans_low with 16bits, need to remove 16bits
+// bd of 10 uses trans_low with 18bits, need to remove 14bits
+// bd of 12 uses trans_low with 20bits, need to remove 12bits
+// bd of x uses trans_low with 8+x bits, need to remove 24-x bits
+#define WRAPLOW(x, bd) ((((int32_t)(x)) << (24 - bd)) >> (24 - bd))
+#else
+#define WRAPLOW(x, bd) ((int32_t)(x))
+#endif  // CONFIG_EMULATE_HARDWARE
+
+void idct4_c(const tran_low_t *input, tran_low_t *output);
+void idct8_c(const tran_low_t *input, tran_low_t *output);
+void idct16_c(const tran_low_t *input, tran_low_t *output);
+void idct32_c(const tran_low_t *input, tran_low_t *output);
+void iadst4_c(const tran_low_t *input, tran_low_t *output);
+void iadst8_c(const tran_low_t *input, tran_low_t *output);
+void iadst16_c(const tran_low_t *input, tran_low_t *output);
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void vp9_highbd_idct4_c(const tran_low_t *input, tran_low_t *output, int bd);
+void vp9_highbd_idct8_c(const tran_low_t *input, tran_low_t *output, int bd);
+void vp9_highbd_idct16_c(const tran_low_t *input, tran_low_t *output, int bd);
+void highbd_idct32_c(const tran_low_t *input, tran_low_t *output, int bd);
+
+void highbd_iadst4_c(const tran_low_t *input, tran_low_t *output, int bd);
+void highbd_iadst8_c(const tran_low_t *input, tran_low_t *output, int bd);
+void highbd_iadst16_c(const tran_low_t *input, tran_low_t *output, int bd);
+
+static INLINE uint16_t highbd_clip_pixel_add(uint16_t dest, tran_high_t trans,
+                                             int bd) {
+  trans = WRAPLOW(trans, bd);
+  return clip_pixel_highbd(WRAPLOW(dest + trans, bd), bd);
+}
+#endif
+
+static INLINE uint8_t clip_pixel_add(uint8_t dest, tran_high_t trans) {
+  trans = WRAPLOW(trans, 8);
+  return clip_pixel(WRAPLOW(dest + trans, 8));
+}
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // VPX_DSP_INV_TXFM_H_
diff --git a/vpx_dsp/vpx_dsp.mk b/vpx_dsp/vpx_dsp.mk
index 4c5545c1a..1416b98d4 100644
--- a/vpx_dsp/vpx_dsp.mk
+++ b/vpx_dsp/vpx_dsp.mk
@@ -169,6 +169,43 @@ DSP_SRCS-$(HAVE_MSA)    += mips/fwd_txfm_msa.c
 DSP_SRCS-$(HAVE_MSA)    += mips/fwd_dct32x32_msa.c
 endif  # CONFIG_VP9_ENCODER
 
+# inverse transform
+ifeq ($(CONFIG_VP9),yes)
+DSP_SRCS-yes            += inv_txfm.h
+DSP_SRCS-yes            += inv_txfm.c
+DSP_SRCS-$(HAVE_SSE2)   += x86/inv_txfm_sse2.h
+DSP_SRCS-$(HAVE_SSE2)   += x86/inv_txfm_sse2.c
+DSP_SRCS-$(HAVE_SSE2)   += x86/inv_txfm_sse2.asm
+ifeq ($(ARCH_X86_64),yes)
+ifeq ($(CONFIG_USE_X86INC),yes)
+DSP_SRCS-$(HAVE_SSSE3)  += x86/inv_txfm_ssse3_x86_64.asm
+endif  # CONFIG_USE_X86INC
+endif  # ARCH_X86_64
+
+ifeq ($(HAVE_NEON_ASM),yes)
+DSP_SRCS-yes  += arm/idct4x4_1_add_neon$(ASM)
+DSP_SRCS-yes  += arm/idct4x4_add_neon$(ASM)
+DSP_SRCS-yes  += arm/idct8x8_1_add_neon$(ASM)
+DSP_SRCS-yes  += arm/idct8x8_add_neon$(ASM)
+DSP_SRCS-yes  += arm/idct16x16_1_add_neon$(ASM)
+DSP_SRCS-yes  += arm/idct16x16_add_neon$(ASM)
+DSP_SRCS-yes  += arm/idct32x32_1_add_neon$(ASM)
+DSP_SRCS-yes  += arm/idct32x32_add_neon$(ASM)
+else
+ifeq ($(HAVE_NEON),yes)
+DSP_SRCS-yes  += arm/idct4x4_1_add_neon.c
+DSP_SRCS-yes  += arm/idct4x4_add_neon.c
+DSP_SRCS-yes  += arm/idct8x8_1_add_neon.c
+DSP_SRCS-yes  += arm/idct8x8_add_neon.c
+DSP_SRCS-yes  += arm/idct16x16_1_add_neon.c
+DSP_SRCS-yes  += arm/idct16x16_add_neon.c
+DSP_SRCS-yes  += arm/idct32x32_1_add_neon.c
+DSP_SRCS-yes  += arm/idct32x32_add_neon.c
+endif  # HAVE_NEON
+endif  # HAVE_NEON_ASM
+DSP_SRCS-$(HAVE_NEON)  += arm/idct16x16_neon.c
+endif  # CONFIG_VP9
+
 # quantization
 ifeq ($(CONFIG_VP9_ENCODER),yes)
 DSP_SRCS-yes            += quantize.c
diff --git a/vpx_dsp/vpx_dsp_rtcd_defs.pl b/vpx_dsp/vpx_dsp_rtcd_defs.pl
index 3b732b9f3..ca564bcf2 100644
--- a/vpx_dsp/vpx_dsp_rtcd_defs.pl
+++ b/vpx_dsp/vpx_dsp_rtcd_defs.pl
@@ -593,6 +593,193 @@ if (vpx_config("CONFIG_VP9_HIGHBITDEPTH") eq "yes") {
 }  # CONFIG_VP9_ENCODER
 
 #
+# Inverse transform
+if (vpx_config("CONFIG_VP9") eq "yes") {
+if (vpx_config("CONFIG_VP9_HIGHBITDEPTH") eq "yes") {
+  # Note as optimized versions of these functions are added we need to add a check to ensure
+  # that when CONFIG_EMULATE_HARDWARE is on, it defaults to the C versions only.
+  add_proto qw/void vp9_idct4x4_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+  specialize qw/vp9_idct4x4_1_add/;
+
+  add_proto qw/void vp9_idct4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+  specialize qw/vp9_idct4x4_16_add/;
+
+  add_proto qw/void vp9_idct8x8_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+  specialize qw/vp9_idct8x8_1_add/;
+
+  add_proto qw/void vp9_idct8x8_64_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+  specialize qw/vp9_idct8x8_64_add/;
+
+  add_proto qw/void vp9_idct8x8_12_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+  specialize qw/vp9_idct8x8_12_add/;
+
+  add_proto qw/void vp9_idct16x16_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+  specialize qw/vp9_idct16x16_1_add/;
+
+  add_proto qw/void vp9_idct16x16_256_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+  specialize qw/vp9_idct16x16_256_add/;
+
+  add_proto qw/void vp9_idct16x16_10_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+  specialize qw/vp9_idct16x16_10_add/;
+
+  add_proto qw/void vp9_idct32x32_1024_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+  specialize qw/vp9_idct32x32_1024_add/;
+
+  add_proto qw/void vp9_idct32x32_34_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+  specialize qw/vp9_idct32x32_34_add/;
+
+  add_proto qw/void vp9_idct32x32_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+  specialize qw/vp9_idct32x32_1_add/;
+
+  add_proto qw/void vp9_iwht4x4_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+  specialize qw/vp9_iwht4x4_1_add/;
+
+  add_proto qw/void vp9_iwht4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+  specialize qw/vp9_iwht4x4_16_add/;
+
+  add_proto qw/void vp9_highbd_idct4x4_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
+  specialize qw/vp9_highbd_idct4x4_1_add/;
+
+  add_proto qw/void vp9_highbd_idct8x8_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
+  specialize qw/vp9_highbd_idct8x8_1_add/;
+
+  add_proto qw/void vp9_highbd_idct16x16_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
+  specialize qw/vp9_highbd_idct16x16_1_add/;
+
+  add_proto qw/void vp9_highbd_idct32x32_1024_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
+  specialize qw/vp9_highbd_idct32x32_1024_add/;
+
+  add_proto qw/void vp9_highbd_idct32x32_34_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
+  specialize qw/vp9_highbd_idct32x32_34_add/;
+
+  add_proto qw/void vp9_highbd_idct32x32_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
+  specialize qw/vp9_highbd_idct32x32_1_add/;
+
+  add_proto qw/void vp9_highbd_iwht4x4_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
+  specialize qw/vp9_highbd_iwht4x4_1_add/;
+
+  add_proto qw/void vp9_highbd_iwht4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
+  specialize qw/vp9_highbd_iwht4x4_16_add/;
+
+  # Force C versions if CONFIG_EMULATE_HARDWARE is 1
+  if (vpx_config("CONFIG_EMULATE_HARDWARE") eq "yes") {
+    add_proto qw/void vp9_highbd_idct4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
+    specialize qw/vp9_highbd_idct4x4_16_add/;
+
+    add_proto qw/void vp9_highbd_idct8x8_64_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
+    specialize qw/vp9_highbd_idct8x8_64_add/;
+
+    add_proto qw/void vp9_highbd_idct8x8_10_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
+    specialize qw/vp9_highbd_idct8x8_10_add/;
+
+    add_proto qw/void vp9_highbd_idct16x16_256_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
+    specialize qw/vp9_highbd_idct16x16_256_add/;
+
+    add_proto qw/void vp9_highbd_idct16x16_10_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
+    specialize qw/vp9_highbd_idct16x16_10_add/;
+  } else {
+    add_proto qw/void vp9_highbd_idct4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
+    specialize qw/vp9_highbd_idct4x4_16_add sse2/;
+
+    add_proto qw/void vp9_highbd_idct8x8_64_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
+    specialize qw/vp9_highbd_idct8x8_64_add sse2/;
+
+    add_proto qw/void vp9_highbd_idct8x8_10_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
+    specialize qw/vp9_highbd_idct8x8_10_add sse2/;
+
+    add_proto qw/void vp9_highbd_idct16x16_256_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
+    specialize qw/vp9_highbd_idct16x16_256_add sse2/;
+
+    add_proto qw/void vp9_highbd_idct16x16_10_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride, int bd";
+    specialize qw/vp9_highbd_idct16x16_10_add sse2/;
+  }  # CONFIG_EMULATE_HARDWARE
+} else {
+  # Force C versions if CONFIG_EMULATE_HARDWARE is 1
+  if (vpx_config("CONFIG_EMULATE_HARDWARE") eq "yes") {
+    add_proto qw/void vp9_idct4x4_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct4x4_1_add/;
+
+    add_proto qw/void vp9_idct4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct4x4_16_add/;
+
+    add_proto qw/void vp9_idct8x8_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct8x8_1_add/;
+
+    add_proto qw/void vp9_idct8x8_64_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct8x8_64_add/;
+
+    add_proto qw/void vp9_idct8x8_12_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct8x8_12_add/;
+
+    add_proto qw/void vp9_idct16x16_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct16x16_1_add/;
+
+    add_proto qw/void vp9_idct16x16_256_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct16x16_256_add/;
+
+    add_proto qw/void vp9_idct16x16_10_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct16x16_10_add/;
+
+    add_proto qw/void vp9_idct32x32_1024_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct32x32_1024_add/;
+
+    add_proto qw/void vp9_idct32x32_34_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct32x32_34_add/;
+
+    add_proto qw/void vp9_idct32x32_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct32x32_1_add/;
+
+    add_proto qw/void vp9_iwht4x4_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_iwht4x4_1_add/;
+
+    add_proto qw/void vp9_iwht4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_iwht4x4_16_add/;
+  } else {
+    add_proto qw/void vp9_idct4x4_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct4x4_1_add sse2 neon dspr2 msa/;
+
+    add_proto qw/void vp9_idct4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct4x4_16_add sse2 neon dspr2 msa/;
+
+    add_proto qw/void vp9_idct8x8_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct8x8_1_add sse2 neon dspr2 msa/;
+
+    add_proto qw/void vp9_idct8x8_64_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct8x8_64_add sse2 neon dspr2 msa/, "$ssse3_x86_64_x86inc";
+
+    add_proto qw/void vp9_idct8x8_12_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct8x8_12_add sse2 neon dspr2 msa/, "$ssse3_x86_64_x86inc";
+
+    add_proto qw/void vp9_idct16x16_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct16x16_1_add sse2 neon dspr2 msa/;
+
+    add_proto qw/void vp9_idct16x16_256_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct16x16_256_add sse2 neon dspr2 msa/;
+
+    add_proto qw/void vp9_idct16x16_10_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct16x16_10_add sse2 neon dspr2 msa/;
+
+    add_proto qw/void vp9_idct32x32_1024_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct32x32_1024_add sse2 neon dspr2 msa/;
+
+    add_proto qw/void vp9_idct32x32_34_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct32x32_34_add sse2 neon_asm dspr2 msa/;
+    # Need to add 34 eob idct32x32 neon implementation.
+    $vp9_idct32x32_34_add_neon_asm=vp9_idct32x32_1024_add_neon;
+
+    add_proto qw/void vp9_idct32x32_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_idct32x32_1_add sse2 neon dspr2 msa/;
+
+    add_proto qw/void vp9_iwht4x4_1_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_iwht4x4_1_add msa/;
+
+    add_proto qw/void vp9_iwht4x4_16_add/, "const tran_low_t *input, uint8_t *dest, int dest_stride";
+    specialize qw/vp9_iwht4x4_16_add msa/, "$sse2_x86inc";
+  }  # CONFIG_EMULATE_HARDWARE
+}  # CONFIG_VP9_HIGHBITDEPTH
+}  # CONFIG_VP9
+
+#
 # Quantization
 #
 if (vpx_config("CONFIG_VP9_ENCODER") eq "yes") {
diff --git a/vp9/common/x86/vp9_idct_sse2.asm b/vpx_dsp/x86/inv_txfm_sse2.asm
index 69b68e6d8..69b68e6d8 100644
--- a/vp9/common/x86/vp9_idct_sse2.asm
+++ b/vpx_dsp/x86/inv_txfm_sse2.asm
diff --git a/vpx_dsp/x86/inv_txfm_sse2.c b/vpx_dsp/x86/inv_txfm_sse2.c
new file mode 100644
index 000000000..f894ee678
--- /dev/null
+++ b/vpx_dsp/x86/inv_txfm_sse2.c
@@ -0,0 +1,4053 @@
+/*
+ *  Copyright (c) 2015 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "vpx_dsp/x86/inv_txfm_sse2.h"
+#include "vpx_dsp/x86/txfm_common_sse2.h"
+
+#define RECON_AND_STORE4X4(dest, in_x) \
+{                                                     \
+  __m128i d0 = _mm_cvtsi32_si128(*(const int *)(dest)); \
+  d0 = _mm_unpacklo_epi8(d0, zero); \
+  d0 = _mm_add_epi16(in_x, d0); \
+  d0 = _mm_packus_epi16(d0, d0); \
+  *(int *)(dest) = _mm_cvtsi128_si32(d0); \
+}
+
+void vp9_idct4x4_16_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
+  const __m128i zero = _mm_setzero_si128();
+  const __m128i eight = _mm_set1_epi16(8);
+  const __m128i cst = _mm_setr_epi16(
+      (int16_t)cospi_16_64, (int16_t)cospi_16_64, (int16_t)cospi_16_64,
+      (int16_t)-cospi_16_64, (int16_t)cospi_24_64, (int16_t)-cospi_8_64,
+      (int16_t)cospi_8_64, (int16_t)cospi_24_64);
+  const __m128i rounding = _mm_set1_epi32(DCT_CONST_ROUNDING);
+  __m128i input0, input1, input2, input3;
+
+  // Rows
+  input0 = _mm_load_si128((const __m128i *)input);
+  input2 = _mm_load_si128((const __m128i *)(input + 8));
+
+  // Construct i3, i1, i3, i1, i2, i0, i2, i0
+  input0 = _mm_shufflelo_epi16(input0, 0xd8);
+  input0 = _mm_shufflehi_epi16(input0, 0xd8);
+  input2 = _mm_shufflelo_epi16(input2, 0xd8);
+  input2 = _mm_shufflehi_epi16(input2, 0xd8);
+
+  input1 = _mm_unpackhi_epi32(input0, input0);
+  input0 = _mm_unpacklo_epi32(input0, input0);
+  input3 = _mm_unpackhi_epi32(input2, input2);
+  input2 = _mm_unpacklo_epi32(input2, input2);
+
+  // Stage 1
+  input0 = _mm_madd_epi16(input0, cst);
+  input1 = _mm_madd_epi16(input1, cst);
+  input2 = _mm_madd_epi16(input2, cst);
+  input3 = _mm_madd_epi16(input3, cst);
+
+  input0 = _mm_add_epi32(input0, rounding);
+  input1 = _mm_add_epi32(input1, rounding);
+  input2 = _mm_add_epi32(input2, rounding);
+  input3 = _mm_add_epi32(input3, rounding);
+
+  input0 = _mm_srai_epi32(input0, DCT_CONST_BITS);
+  input1 = _mm_srai_epi32(input1, DCT_CONST_BITS);
+  input2 = _mm_srai_epi32(input2, DCT_CONST_BITS);
+  input3 = _mm_srai_epi32(input3, DCT_CONST_BITS);
+
+  // Stage 2
+  input0 = _mm_packs_epi32(input0, input1);
+  input1 = _mm_packs_epi32(input2, input3);
+
+  // Transpose
+  input2 = _mm_unpacklo_epi16(input0, input1);
+  input3 = _mm_unpackhi_epi16(input0, input1);
+  input0 = _mm_unpacklo_epi32(input2, input3);
+  input1 = _mm_unpackhi_epi32(input2, input3);
+
+  // Switch column2, column 3, and then, we got:
+  // input2: column1, column 0;  input3: column2, column 3.
+  input1 = _mm_shuffle_epi32(input1, 0x4e);
+  input2 = _mm_add_epi16(input0, input1);
+  input3 = _mm_sub_epi16(input0, input1);
+
+  // Columns
+  // Construct i3, i1, i3, i1, i2, i0, i2, i0
+  input0 = _mm_unpacklo_epi32(input2, input2);
+  input1 = _mm_unpackhi_epi32(input2, input2);
+  input2 = _mm_unpackhi_epi32(input3, input3);
+  input3 = _mm_unpacklo_epi32(input3, input3);
+
+  // Stage 1
+  input0 = _mm_madd_epi16(input0, cst);
+  input1 = _mm_madd_epi16(input1, cst);
+  input2 = _mm_madd_epi16(input2, cst);
+  input3 = _mm_madd_epi16(input3, cst);
+
+  input0 = _mm_add_epi32(input0, rounding);
+  input1 = _mm_add_epi32(input1, rounding);
+  input2 = _mm_add_epi32(input2, rounding);
+  input3 = _mm_add_epi32(input3, rounding);
+
+  input0 = _mm_srai_epi32(input0, DCT_CONST_BITS);
+  input1 = _mm_srai_epi32(input1, DCT_CONST_BITS);
+  input2 = _mm_srai_epi32(input2, DCT_CONST_BITS);
+  input3 = _mm_srai_epi32(input3, DCT_CONST_BITS);
+
+  // Stage 2
+  input0 = _mm_packs_epi32(input0, input2);
+  input1 = _mm_packs_epi32(input1, input3);
+
+  // Transpose
+  input2 = _mm_unpacklo_epi16(input0, input1);
+  input3 = _mm_unpackhi_epi16(input0, input1);
+  input0 = _mm_unpacklo_epi32(input2, input3);
+  input1 = _mm_unpackhi_epi32(input2, input3);
+
+  // Switch column2, column 3, and then, we got:
+  // input2: column1, column 0;  input3: column2, column 3.
+  input1 = _mm_shuffle_epi32(input1, 0x4e);
+  input2 = _mm_add_epi16(input0, input1);
+  input3 = _mm_sub_epi16(input0, input1);
+
+  // Final round and shift
+  input2 = _mm_add_epi16(input2, eight);
+  input3 = _mm_add_epi16(input3, eight);
+
+  input2 = _mm_srai_epi16(input2, 4);
+  input3 = _mm_srai_epi16(input3, 4);
+
+  // Reconstruction and Store
+  {
+    __m128i d0 = _mm_cvtsi32_si128(*(const int *)(dest));
+    __m128i d2 = _mm_cvtsi32_si128(*(const int *)(dest + stride * 2));
+    d0 = _mm_unpacklo_epi32(d0,
+                            _mm_cvtsi32_si128(*(const int *)(dest + stride)));
+    d2 = _mm_unpacklo_epi32(
+        _mm_cvtsi32_si128(*(const int *)(dest + stride * 3)), d2);
+    d0 = _mm_unpacklo_epi8(d0, zero);
+    d2 = _mm_unpacklo_epi8(d2, zero);
+    d0 = _mm_add_epi16(d0, input2);
+    d2 = _mm_add_epi16(d2, input3);
+    d0 = _mm_packus_epi16(d0, d2);
+    // store input0
+    *(int *)dest = _mm_cvtsi128_si32(d0);
+    // store input1
+    d0 = _mm_srli_si128(d0, 4);
+    *(int *)(dest + stride) = _mm_cvtsi128_si32(d0);
+    // store input2
+    d0 = _mm_srli_si128(d0, 4);
+    *(int *)(dest + stride * 3) = _mm_cvtsi128_si32(d0);
+    // store input3
+    d0 = _mm_srli_si128(d0, 4);
+    *(int *)(dest + stride * 2) = _mm_cvtsi128_si32(d0);
+  }
+}
+
+void vp9_idct4x4_1_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
+  __m128i dc_value;
+  const __m128i zero = _mm_setzero_si128();
+  int a;
+
+  a = dct_const_round_shift(input[0] * cospi_16_64);
+  a = dct_const_round_shift(a * cospi_16_64);
+  a = ROUND_POWER_OF_TWO(a, 4);
+
+  dc_value = _mm_set1_epi16(a);
+
+  RECON_AND_STORE4X4(dest + 0 * stride, dc_value);
+  RECON_AND_STORE4X4(dest + 1 * stride, dc_value);
+  RECON_AND_STORE4X4(dest + 2 * stride, dc_value);
+  RECON_AND_STORE4X4(dest + 3 * stride, dc_value);
+}
+
+static INLINE void transpose_4x4(__m128i *res) {
+  const __m128i tr0_0 = _mm_unpacklo_epi16(res[0], res[1]);
+  const __m128i tr0_1 = _mm_unpackhi_epi16(res[0], res[1]);
+
+  res[0] = _mm_unpacklo_epi16(tr0_0, tr0_1);
+  res[1] = _mm_unpackhi_epi16(tr0_0, tr0_1);
+}
+
+void idct4_sse2(__m128i *in) {
+  const __m128i k__cospi_p16_p16 = pair_set_epi16(cospi_16_64, cospi_16_64);
+  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);
+  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);
+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
+  __m128i u[8], v[8];
+
+  transpose_4x4(in);
+  // stage 1
+  u[0] = _mm_unpacklo_epi16(in[0], in[1]);
+  u[1] = _mm_unpackhi_epi16(in[0], in[1]);
+  v[0] = _mm_madd_epi16(u[0], k__cospi_p16_p16);
+  v[1] = _mm_madd_epi16(u[0], k__cospi_p16_m16);
+  v[2] = _mm_madd_epi16(u[1], k__cospi_p24_m08);
+  v[3] = _mm_madd_epi16(u[1], k__cospi_p08_p24);
+
+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
+
+  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
+  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
+  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
+  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
+
+  u[0] = _mm_packs_epi32(v[0], v[1]);
+  u[1] = _mm_packs_epi32(v[3], v[2]);
+
+  // stage 2
+  in[0] = _mm_add_epi16(u[0], u[1]);
+  in[1] = _mm_sub_epi16(u[0], u[1]);
+  in[1] = _mm_shuffle_epi32(in[1], 0x4E);
+}
+
+void iadst4_sse2(__m128i *in) {
+  const __m128i k__sinpi_p01_p04 = pair_set_epi16(sinpi_1_9, sinpi_4_9);
+  const __m128i k__sinpi_p03_p02 = pair_set_epi16(sinpi_3_9, sinpi_2_9);
+  const __m128i k__sinpi_p02_m01 = pair_set_epi16(sinpi_2_9, -sinpi_1_9);
+  const __m128i k__sinpi_p03_m04 = pair_set_epi16(sinpi_3_9, -sinpi_4_9);
+  const __m128i k__sinpi_p03_p03 = _mm_set1_epi16((int16_t)sinpi_3_9);
+  const __m128i kZero = _mm_set1_epi16(0);
+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
+  __m128i u[8], v[8], in7;
+
+  transpose_4x4(in);
+  in7 = _mm_srli_si128(in[1], 8);
+  in7 = _mm_add_epi16(in7, in[0]);
+  in7 = _mm_sub_epi16(in7, in[1]);
+
+  u[0] = _mm_unpacklo_epi16(in[0], in[1]);
+  u[1] = _mm_unpackhi_epi16(in[0], in[1]);
+  u[2] = _mm_unpacklo_epi16(in7, kZero);
+  u[3] = _mm_unpackhi_epi16(in[0], kZero);
+
+  v[0] = _mm_madd_epi16(u[0], k__sinpi_p01_p04);  // s0 + s3
+  v[1] = _mm_madd_epi16(u[1], k__sinpi_p03_p02);  // s2 + s5
+  v[2] = _mm_madd_epi16(u[2], k__sinpi_p03_p03);  // x2
+  v[3] = _mm_madd_epi16(u[0], k__sinpi_p02_m01);  // s1 - s4
+  v[4] = _mm_madd_epi16(u[1], k__sinpi_p03_m04);  // s2 - s6
+  v[5] = _mm_madd_epi16(u[3], k__sinpi_p03_p03);  // s2
+
+  u[0] = _mm_add_epi32(v[0], v[1]);
+  u[1] = _mm_add_epi32(v[3], v[4]);
+  u[2] = v[2];
+  u[3] = _mm_add_epi32(u[0], u[1]);
+  u[4] = _mm_slli_epi32(v[5], 2);
+  u[5] = _mm_add_epi32(u[3], v[5]);
+  u[6] = _mm_sub_epi32(u[5], u[4]);
+
+  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);
+  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);
+  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);
+  v[3] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);
+
+  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);
+  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);
+  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);
+  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);
+
+  in[0] = _mm_packs_epi32(u[0], u[1]);
+  in[1] = _mm_packs_epi32(u[2], u[3]);
+}
+
+#define TRANSPOSE_8X8(in0, in1, in2, in3, in4, in5, in6, in7, \
+                      out0, out1, out2, out3, out4, out5, out6, out7) \
+  {                                                     \
+    const __m128i tr0_0 = _mm_unpacklo_epi16(in0, in1); \
+    const __m128i tr0_1 = _mm_unpacklo_epi16(in2, in3); \
+    const __m128i tr0_2 = _mm_unpackhi_epi16(in0, in1); \
+    const __m128i tr0_3 = _mm_unpackhi_epi16(in2, in3); \
+    const __m128i tr0_4 = _mm_unpacklo_epi16(in4, in5); \
+    const __m128i tr0_5 = _mm_unpacklo_epi16(in6, in7); \
+    const __m128i tr0_6 = _mm_unpackhi_epi16(in4, in5); \
+    const __m128i tr0_7 = _mm_unpackhi_epi16(in6, in7); \
+                                                        \
+    const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1); \
+    const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_2, tr0_3); \
+    const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1); \
+    const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_2, tr0_3); \
+    const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5); \
+    const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7); \
+    const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5); \
+    const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7); \
+                                                            \
+    out0 = _mm_unpacklo_epi64(tr1_0, tr1_4); \
+    out1 = _mm_unpackhi_epi64(tr1_0, tr1_4); \
+    out2 = _mm_unpacklo_epi64(tr1_2, tr1_6); \
+    out3 = _mm_unpackhi_epi64(tr1_2, tr1_6); \
+    out4 = _mm_unpacklo_epi64(tr1_1, tr1_5); \
+    out5 = _mm_unpackhi_epi64(tr1_1, tr1_5); \
+    out6 = _mm_unpacklo_epi64(tr1_3, tr1_7); \
+    out7 = _mm_unpackhi_epi64(tr1_3, tr1_7); \
+  }
+
+#define TRANSPOSE_4X8_10(tmp0, tmp1, tmp2, tmp3, \
+                         out0, out1, out2, out3) \
+  {                                              \
+    const __m128i tr0_0 = _mm_unpackhi_epi16(tmp0, tmp1); \
+    const __m128i tr0_1 = _mm_unpacklo_epi16(tmp1, tmp0); \
+    const __m128i tr0_4 = _mm_unpacklo_epi16(tmp2, tmp3); \
+    const __m128i tr0_5 = _mm_unpackhi_epi16(tmp3, tmp2); \
+    \
+    const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1); \
+    const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1); \
+    const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5); \
+    const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5); \
+    \
+    out0 = _mm_unpacklo_epi64(tr1_0, tr1_4); \
+    out1 = _mm_unpackhi_epi64(tr1_0, tr1_4); \
+    out2 = _mm_unpacklo_epi64(tr1_2, tr1_6); \
+    out3 = _mm_unpackhi_epi64(tr1_2, tr1_6); \
+  }
+
+#define TRANSPOSE_8X8_10(in0, in1, in2, in3, out0, out1) \
+  {                                            \
+    const __m128i tr0_0 = _mm_unpacklo_epi16(in0, in1); \
+    const __m128i tr0_1 = _mm_unpacklo_epi16(in2, in3); \
+    out0 = _mm_unpacklo_epi32(tr0_0, tr0_1); \
+    out1 = _mm_unpackhi_epi32(tr0_0, tr0_1); \
+  }
+
+// Define Macro for multiplying elements by constants and adding them together.
+#define MULTIPLICATION_AND_ADD(lo_0, hi_0, lo_1, hi_1, \
+                               cst0, cst1, cst2, cst3, res0, res1, res2, res3) \
+  {   \
+      tmp0 = _mm_madd_epi16(lo_0, cst0); \
+      tmp1 = _mm_madd_epi16(hi_0, cst0); \
+      tmp2 = _mm_madd_epi16(lo_0, cst1); \
+      tmp3 = _mm_madd_epi16(hi_0, cst1); \
+      tmp4 = _mm_madd_epi16(lo_1, cst2); \
+      tmp5 = _mm_madd_epi16(hi_1, cst2); \
+      tmp6 = _mm_madd_epi16(lo_1, cst3); \
+      tmp7 = _mm_madd_epi16(hi_1, cst3); \
+      \
+      tmp0 = _mm_add_epi32(tmp0, rounding); \
+      tmp1 = _mm_add_epi32(tmp1, rounding); \
+      tmp2 = _mm_add_epi32(tmp2, rounding); \
+      tmp3 = _mm_add_epi32(tmp3, rounding); \
+      tmp4 = _mm_add_epi32(tmp4, rounding); \
+      tmp5 = _mm_add_epi32(tmp5, rounding); \
+      tmp6 = _mm_add_epi32(tmp6, rounding); \
+      tmp7 = _mm_add_epi32(tmp7, rounding); \
+      \
+      tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS); \
+      tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS); \
+      tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS); \
+      tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS); \
+      tmp4 = _mm_srai_epi32(tmp4, DCT_CONST_BITS); \
+      tmp5 = _mm_srai_epi32(tmp5, DCT_CONST_BITS); \
+      tmp6 = _mm_srai_epi32(tmp6, DCT_CONST_BITS); \
+      tmp7 = _mm_srai_epi32(tmp7, DCT_CONST_BITS); \
+      \
+      res0 = _mm_packs_epi32(tmp0, tmp1); \
+      res1 = _mm_packs_epi32(tmp2, tmp3); \
+      res2 = _mm_packs_epi32(tmp4, tmp5); \
+      res3 = _mm_packs_epi32(tmp6, tmp7); \
+  }
+
+#define MULTIPLICATION_AND_ADD_2(lo_0, hi_0, cst0, cst1, res0, res1) \
+  {   \
+      tmp0 = _mm_madd_epi16(lo_0, cst0); \
+      tmp1 = _mm_madd_epi16(hi_0, cst0); \
+      tmp2 = _mm_madd_epi16(lo_0, cst1); \
+      tmp3 = _mm_madd_epi16(hi_0, cst1); \
+      \
+      tmp0 = _mm_add_epi32(tmp0, rounding); \
+      tmp1 = _mm_add_epi32(tmp1, rounding); \
+      tmp2 = _mm_add_epi32(tmp2, rounding); \
+      tmp3 = _mm_add_epi32(tmp3, rounding); \
+      \
+      tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS); \
+      tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS); \
+      tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS); \
+      tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS); \
+      \
+      res0 = _mm_packs_epi32(tmp0, tmp1); \
+      res1 = _mm_packs_epi32(tmp2, tmp3); \
+  }
+
+#define IDCT8(in0, in1, in2, in3, in4, in5, in6, in7, \
+              out0, out1, out2, out3, out4, out5, out6, out7)  \
+  { \
+  /* Stage1 */      \
+  { \
+    const __m128i lo_17 = _mm_unpacklo_epi16(in1, in7); \
+    const __m128i hi_17 = _mm_unpackhi_epi16(in1, in7); \
+    const __m128i lo_35 = _mm_unpacklo_epi16(in3, in5); \
+    const __m128i hi_35 = _mm_unpackhi_epi16(in3, in5); \
+    \
+    MULTIPLICATION_AND_ADD(lo_17, hi_17, lo_35, hi_35, stg1_0, \
+                          stg1_1, stg1_2, stg1_3, stp1_4,      \
+                          stp1_7, stp1_5, stp1_6)              \
+  } \
+    \
+  /* Stage2 */ \
+  { \
+    const __m128i lo_04 = _mm_unpacklo_epi16(in0, in4); \
+    const __m128i hi_04 = _mm_unpackhi_epi16(in0, in4); \
+    const __m128i lo_26 = _mm_unpacklo_epi16(in2, in6); \
+    const __m128i hi_26 = _mm_unpackhi_epi16(in2, in6); \
+    \
+    MULTIPLICATION_AND_ADD(lo_04, hi_04, lo_26, hi_26, stg2_0, \
+                           stg2_1, stg2_2, stg2_3, stp2_0,     \
+                           stp2_1, stp2_2, stp2_3)             \
+    \
+    stp2_4 = _mm_adds_epi16(stp1_4, stp1_5); \
+    stp2_5 = _mm_subs_epi16(stp1_4, stp1_5); \
+    stp2_6 = _mm_subs_epi16(stp1_7, stp1_6); \
+    stp2_7 = _mm_adds_epi16(stp1_7, stp1_6); \
+  } \
+    \
+  /* Stage3 */ \
+  { \
+    const __m128i lo_56 = _mm_unpacklo_epi16(stp2_6, stp2_5); \
+    const __m128i hi_56 = _mm_unpackhi_epi16(stp2_6, stp2_5); \
+    \
+    stp1_0 = _mm_adds_epi16(stp2_0, stp2_3); \
+    stp1_1 = _mm_adds_epi16(stp2_1, stp2_2); \
+    stp1_2 = _mm_subs_epi16(stp2_1, stp2_2); \
+    stp1_3 = _mm_subs_epi16(stp2_0, stp2_3); \
+    \
+    tmp0 = _mm_madd_epi16(lo_56, stg2_1); \
+    tmp1 = _mm_madd_epi16(hi_56, stg2_1); \
+    tmp2 = _mm_madd_epi16(lo_56, stg2_0); \
+    tmp3 = _mm_madd_epi16(hi_56, stg2_0); \
+    \
+    tmp0 = _mm_add_epi32(tmp0, rounding); \
+    tmp1 = _mm_add_epi32(tmp1, rounding); \
+    tmp2 = _mm_add_epi32(tmp2, rounding); \
+    tmp3 = _mm_add_epi32(tmp3, rounding); \
+    \
+    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS); \
+    tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS); \
+    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS); \
+    tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS); \
+    \
+    stp1_5 = _mm_packs_epi32(tmp0, tmp1); \
+    stp1_6 = _mm_packs_epi32(tmp2, tmp3); \
+  } \
+  \
+  /* Stage4  */ \
+  out0 = _mm_adds_epi16(stp1_0, stp2_7); \
+  out1 = _mm_adds_epi16(stp1_1, stp1_6); \
+  out2 = _mm_adds_epi16(stp1_2, stp1_5); \
+  out3 = _mm_adds_epi16(stp1_3, stp2_4); \
+  out4 = _mm_subs_epi16(stp1_3, stp2_4); \
+  out5 = _mm_subs_epi16(stp1_2, stp1_5); \
+  out6 = _mm_subs_epi16(stp1_1, stp1_6); \
+  out7 = _mm_subs_epi16(stp1_0, stp2_7); \
+  }
+
+void vp9_idct8x8_64_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
+  const __m128i zero = _mm_setzero_si128();
+  const __m128i rounding = _mm_set1_epi32(DCT_CONST_ROUNDING);
+  const __m128i final_rounding = _mm_set1_epi16(1 << 4);
+  const __m128i stg1_0 = pair_set_epi16(cospi_28_64, -cospi_4_64);
+  const __m128i stg1_1 = pair_set_epi16(cospi_4_64, cospi_28_64);
+  const __m128i stg1_2 = pair_set_epi16(-cospi_20_64, cospi_12_64);
+  const __m128i stg1_3 = pair_set_epi16(cospi_12_64, cospi_20_64);
+  const __m128i stg2_0 = pair_set_epi16(cospi_16_64, cospi_16_64);
+  const __m128i stg2_1 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+  const __m128i stg2_2 = pair_set_epi16(cospi_24_64, -cospi_8_64);
+  const __m128i stg2_3 = pair_set_epi16(cospi_8_64, cospi_24_64);
+
+  __m128i in0, in1, in2, in3, in4, in5, in6, in7;
+  __m128i stp1_0, stp1_1, stp1_2, stp1_3, stp1_4, stp1_5, stp1_6, stp1_7;
+  __m128i stp2_0, stp2_1, stp2_2, stp2_3, stp2_4, stp2_5, stp2_6, stp2_7;
+  __m128i tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
+  int i;
+
+  // Load input data.
+  in0 = _mm_load_si128((const __m128i *)input);
+  in1 = _mm_load_si128((const __m128i *)(input + 8 * 1));
+  in2 = _mm_load_si128((const __m128i *)(input + 8 * 2));
+  in3 = _mm_load_si128((const __m128i *)(input + 8 * 3));
+  in4 = _mm_load_si128((const __m128i *)(input + 8 * 4));
+  in5 = _mm_load_si128((const __m128i *)(input + 8 * 5));
+  in6 = _mm_load_si128((const __m128i *)(input + 8 * 6));
+  in7 = _mm_load_si128((const __m128i *)(input + 8 * 7));
+
+  // 2-D
+  for (i = 0; i < 2; i++) {
+    // 8x8 Transpose is copied from vp9_fdct8x8_sse2()
+    TRANSPOSE_8X8(in0, in1, in2, in3, in4, in5, in6, in7,
+                  in0, in1, in2, in3, in4, in5, in6, in7);
+
+    // 4-stage 1D idct8x8
+    IDCT8(in0, in1, in2, in3, in4, in5, in6, in7,
+          in0, in1, in2, in3, in4, in5, in6, in7);
+  }
+
+  // Final rounding and shift
+  in0 = _mm_adds_epi16(in0, final_rounding);
+  in1 = _mm_adds_epi16(in1, final_rounding);
+  in2 = _mm_adds_epi16(in2, final_rounding);
+  in3 = _mm_adds_epi16(in3, final_rounding);
+  in4 = _mm_adds_epi16(in4, final_rounding);
+  in5 = _mm_adds_epi16(in5, final_rounding);
+  in6 = _mm_adds_epi16(in6, final_rounding);
+  in7 = _mm_adds_epi16(in7, final_rounding);
+
+  in0 = _mm_srai_epi16(in0, 5);
+  in1 = _mm_srai_epi16(in1, 5);
+  in2 = _mm_srai_epi16(in2, 5);
+  in3 = _mm_srai_epi16(in3, 5);
+  in4 = _mm_srai_epi16(in4, 5);
+  in5 = _mm_srai_epi16(in5, 5);
+  in6 = _mm_srai_epi16(in6, 5);
+  in7 = _mm_srai_epi16(in7, 5);
+
+  RECON_AND_STORE(dest + 0 * stride, in0);
+  RECON_AND_STORE(dest + 1 * stride, in1);
+  RECON_AND_STORE(dest + 2 * stride, in2);
+  RECON_AND_STORE(dest + 3 * stride, in3);
+  RECON_AND_STORE(dest + 4 * stride, in4);
+  RECON_AND_STORE(dest + 5 * stride, in5);
+  RECON_AND_STORE(dest + 6 * stride, in6);
+  RECON_AND_STORE(dest + 7 * stride, in7);
+}
+
+void vp9_idct8x8_1_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
+  __m128i dc_value;
+  const __m128i zero = _mm_setzero_si128();
+  int a;
+
+  a = dct_const_round_shift(input[0] * cospi_16_64);
+  a = dct_const_round_shift(a * cospi_16_64);
+  a = ROUND_POWER_OF_TWO(a, 5);
+
+  dc_value = _mm_set1_epi16(a);
+
+  RECON_AND_STORE(dest + 0 * stride, dc_value);
+  RECON_AND_STORE(dest + 1 * stride, dc_value);
+  RECON_AND_STORE(dest + 2 * stride, dc_value);
+  RECON_AND_STORE(dest + 3 * stride, dc_value);
+  RECON_AND_STORE(dest + 4 * stride, dc_value);
+  RECON_AND_STORE(dest + 5 * stride, dc_value);
+  RECON_AND_STORE(dest + 6 * stride, dc_value);
+  RECON_AND_STORE(dest + 7 * stride, dc_value);
+}
+
+void idct8_sse2(__m128i *in) {
+  const __m128i rounding = _mm_set1_epi32(DCT_CONST_ROUNDING);
+  const __m128i stg1_0 = pair_set_epi16(cospi_28_64, -cospi_4_64);
+  const __m128i stg1_1 = pair_set_epi16(cospi_4_64, cospi_28_64);
+  const __m128i stg1_2 = pair_set_epi16(-cospi_20_64, cospi_12_64);
+  const __m128i stg1_3 = pair_set_epi16(cospi_12_64, cospi_20_64);
+  const __m128i stg2_0 = pair_set_epi16(cospi_16_64, cospi_16_64);
+  const __m128i stg2_1 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+  const __m128i stg2_2 = pair_set_epi16(cospi_24_64, -cospi_8_64);
+  const __m128i stg2_3 = pair_set_epi16(cospi_8_64, cospi_24_64);
+
+  __m128i in0, in1, in2, in3, in4, in5, in6, in7;
+  __m128i stp1_0, stp1_1, stp1_2, stp1_3, stp1_4, stp1_5, stp1_6, stp1_7;
+  __m128i stp2_0, stp2_1, stp2_2, stp2_3, stp2_4, stp2_5, stp2_6, stp2_7;
+  __m128i tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
+
+  // 8x8 Transpose is copied from vp9_fdct8x8_sse2()
+  TRANSPOSE_8X8(in[0], in[1], in[2], in[3], in[4], in[5], in[6], in[7],
+                in0, in1, in2, in3, in4, in5, in6, in7);
+
+  // 4-stage 1D idct8x8
+  IDCT8(in0, in1, in2, in3, in4, in5, in6, in7,
+        in[0], in[1], in[2], in[3], in[4], in[5], in[6], in[7]);
+}
+
+void iadst8_sse2(__m128i *in) {
+  const __m128i k__cospi_p02_p30 = pair_set_epi16(cospi_2_64, cospi_30_64);
+  const __m128i k__cospi_p30_m02 = pair_set_epi16(cospi_30_64, -cospi_2_64);
+  const __m128i k__cospi_p10_p22 = pair_set_epi16(cospi_10_64, cospi_22_64);
+  const __m128i k__cospi_p22_m10 = pair_set_epi16(cospi_22_64, -cospi_10_64);
+  const __m128i k__cospi_p18_p14 = pair_set_epi16(cospi_18_64, cospi_14_64);
+  const __m128i k__cospi_p14_m18 = pair_set_epi16(cospi_14_64, -cospi_18_64);
+  const __m128i k__cospi_p26_p06 = pair_set_epi16(cospi_26_64, cospi_6_64);
+  const __m128i k__cospi_p06_m26 = pair_set_epi16(cospi_6_64, -cospi_26_64);
+  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);
+  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);
+  const __m128i k__cospi_m24_p08 = pair_set_epi16(-cospi_24_64, cospi_8_64);
+  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);
+  const __m128i k__const_0 = _mm_set1_epi16(0);
+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
+
+  __m128i u0, u1, u2, u3, u4, u5, u6, u7, u8, u9, u10, u11, u12, u13, u14, u15;
+  __m128i v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15;
+  __m128i w0, w1, w2, w3, w4, w5, w6, w7, w8, w9, w10, w11, w12, w13, w14, w15;
+  __m128i s0, s1, s2, s3, s4, s5, s6, s7;
+  __m128i in0, in1, in2, in3, in4, in5, in6, in7;
+
+  // transpose
+  array_transpose_8x8(in, in);
+
+  // properly aligned for butterfly input
+  in0 = in[7];
+  in1 = in[0];
+  in2 = in[5];
+  in3 = in[2];
+  in4 = in[3];
+  in5 = in[4];
+  in6 = in[1];
+  in7 = in[6];
+
+  // column transformation
+  // stage 1
+  // interleave and multiply/add into 32-bit integer
+  s0 = _mm_unpacklo_epi16(in0, in1);
+  s1 = _mm_unpackhi_epi16(in0, in1);
+  s2 = _mm_unpacklo_epi16(in2, in3);
+  s3 = _mm_unpackhi_epi16(in2, in3);
+  s4 = _mm_unpacklo_epi16(in4, in5);
+  s5 = _mm_unpackhi_epi16(in4, in5);
+  s6 = _mm_unpacklo_epi16(in6, in7);
+  s7 = _mm_unpackhi_epi16(in6, in7);
+
+  u0 = _mm_madd_epi16(s0, k__cospi_p02_p30);
+  u1 = _mm_madd_epi16(s1, k__cospi_p02_p30);
+  u2 = _mm_madd_epi16(s0, k__cospi_p30_m02);
+  u3 = _mm_madd_epi16(s1, k__cospi_p30_m02);
+  u4 = _mm_madd_epi16(s2, k__cospi_p10_p22);
+  u5 = _mm_madd_epi16(s3, k__cospi_p10_p22);
+  u6 = _mm_madd_epi16(s2, k__cospi_p22_m10);
+  u7 = _mm_madd_epi16(s3, k__cospi_p22_m10);
+  u8 = _mm_madd_epi16(s4, k__cospi_p18_p14);
+  u9 = _mm_madd_epi16(s5, k__cospi_p18_p14);
+  u10 = _mm_madd_epi16(s4, k__cospi_p14_m18);
+  u11 = _mm_madd_epi16(s5, k__cospi_p14_m18);
+  u12 = _mm_madd_epi16(s6, k__cospi_p26_p06);
+  u13 = _mm_madd_epi16(s7, k__cospi_p26_p06);
+  u14 = _mm_madd_epi16(s6, k__cospi_p06_m26);
+  u15 = _mm_madd_epi16(s7, k__cospi_p06_m26);
+
+  // addition
+  w0 = _mm_add_epi32(u0, u8);
+  w1 = _mm_add_epi32(u1, u9);
+  w2 = _mm_add_epi32(u2, u10);
+  w3 = _mm_add_epi32(u3, u11);
+  w4 = _mm_add_epi32(u4, u12);
+  w5 = _mm_add_epi32(u5, u13);
+  w6 = _mm_add_epi32(u6, u14);
+  w7 = _mm_add_epi32(u7, u15);
+  w8 = _mm_sub_epi32(u0, u8);
+  w9 = _mm_sub_epi32(u1, u9);
+  w10 = _mm_sub_epi32(u2, u10);
+  w11 = _mm_sub_epi32(u3, u11);
+  w12 = _mm_sub_epi32(u4, u12);
+  w13 = _mm_sub_epi32(u5, u13);
+  w14 = _mm_sub_epi32(u6, u14);
+  w15 = _mm_sub_epi32(u7, u15);
+
+  // shift and rounding
+  v0 = _mm_add_epi32(w0, k__DCT_CONST_ROUNDING);
+  v1 = _mm_add_epi32(w1, k__DCT_CONST_ROUNDING);
+  v2 = _mm_add_epi32(w2, k__DCT_CONST_ROUNDING);
+  v3 = _mm_add_epi32(w3, k__DCT_CONST_ROUNDING);
+  v4 = _mm_add_epi32(w4, k__DCT_CONST_ROUNDING);
+  v5 = _mm_add_epi32(w5, k__DCT_CONST_ROUNDING);
+  v6 = _mm_add_epi32(w6, k__DCT_CONST_ROUNDING);
+  v7 = _mm_add_epi32(w7, k__DCT_CONST_ROUNDING);
+  v8 = _mm_add_epi32(w8, k__DCT_CONST_ROUNDING);
+  v9 = _mm_add_epi32(w9, k__DCT_CONST_ROUNDING);
+  v10 = _mm_add_epi32(w10, k__DCT_CONST_ROUNDING);
+  v11 = _mm_add_epi32(w11, k__DCT_CONST_ROUNDING);
+  v12 = _mm_add_epi32(w12, k__DCT_CONST_ROUNDING);
+  v13 = _mm_add_epi32(w13, k__DCT_CONST_ROUNDING);
+  v14 = _mm_add_epi32(w14, k__DCT_CONST_ROUNDING);
+  v15 = _mm_add_epi32(w15, k__DCT_CONST_ROUNDING);
+
+  u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
+  u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
+  u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
+  u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
+  u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);
+  u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);
+  u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);
+  u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);
+  u8 = _mm_srai_epi32(v8, DCT_CONST_BITS);
+  u9 = _mm_srai_epi32(v9, DCT_CONST_BITS);
+  u10 = _mm_srai_epi32(v10, DCT_CONST_BITS);
+  u11 = _mm_srai_epi32(v11, DCT_CONST_BITS);
+  u12 = _mm_srai_epi32(v12, DCT_CONST_BITS);
+  u13 = _mm_srai_epi32(v13, DCT_CONST_BITS);
+  u14 = _mm_srai_epi32(v14, DCT_CONST_BITS);
+  u15 = _mm_srai_epi32(v15, DCT_CONST_BITS);
+
+  // back to 16-bit and pack 8 integers into __m128i
+  in[0] = _mm_packs_epi32(u0, u1);
+  in[1] = _mm_packs_epi32(u2, u3);
+  in[2] = _mm_packs_epi32(u4, u5);
+  in[3] = _mm_packs_epi32(u6, u7);
+  in[4] = _mm_packs_epi32(u8, u9);
+  in[5] = _mm_packs_epi32(u10, u11);
+  in[6] = _mm_packs_epi32(u12, u13);
+  in[7] = _mm_packs_epi32(u14, u15);
+
+  // stage 2
+  s0 = _mm_add_epi16(in[0], in[2]);
+  s1 = _mm_add_epi16(in[1], in[3]);
+  s2 = _mm_sub_epi16(in[0], in[2]);
+  s3 = _mm_sub_epi16(in[1], in[3]);
+  u0 = _mm_unpacklo_epi16(in[4], in[5]);
+  u1 = _mm_unpackhi_epi16(in[4], in[5]);
+  u2 = _mm_unpacklo_epi16(in[6], in[7]);
+  u3 = _mm_unpackhi_epi16(in[6], in[7]);
+
+  v0 = _mm_madd_epi16(u0, k__cospi_p08_p24);
+  v1 = _mm_madd_epi16(u1, k__cospi_p08_p24);
+  v2 = _mm_madd_epi16(u0, k__cospi_p24_m08);
+  v3 = _mm_madd_epi16(u1, k__cospi_p24_m08);
+  v4 = _mm_madd_epi16(u2, k__cospi_m24_p08);
+  v5 = _mm_madd_epi16(u3, k__cospi_m24_p08);
+  v6 = _mm_madd_epi16(u2, k__cospi_p08_p24);
+  v7 = _mm_madd_epi16(u3, k__cospi_p08_p24);
+
+  w0 = _mm_add_epi32(v0, v4);
+  w1 = _mm_add_epi32(v1, v5);
+  w2 = _mm_add_epi32(v2, v6);
+  w3 = _mm_add_epi32(v3, v7);
+  w4 = _mm_sub_epi32(v0, v4);
+  w5 = _mm_sub_epi32(v1, v5);
+  w6 = _mm_sub_epi32(v2, v6);
+  w7 = _mm_sub_epi32(v3, v7);
+
+  v0 = _mm_add_epi32(w0, k__DCT_CONST_ROUNDING);
+  v1 = _mm_add_epi32(w1, k__DCT_CONST_ROUNDING);
+  v2 = _mm_add_epi32(w2, k__DCT_CONST_ROUNDING);
+  v3 = _mm_add_epi32(w3, k__DCT_CONST_ROUNDING);
+  v4 = _mm_add_epi32(w4, k__DCT_CONST_ROUNDING);
+  v5 = _mm_add_epi32(w5, k__DCT_CONST_ROUNDING);
+  v6 = _mm_add_epi32(w6, k__DCT_CONST_ROUNDING);
+  v7 = _mm_add_epi32(w7, k__DCT_CONST_ROUNDING);
+
+  u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);
+  u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);
+  u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);
+  u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);
+  u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);
+  u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);
+  u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);
+  u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);
+
+  // back to 16-bit intergers
+  s4 = _mm_packs_epi32(u0, u1);
+  s5 = _mm_packs_epi32(u2, u3);
+  s6 = _mm_packs_epi32(u4, u5);
+  s7 = _mm_packs_epi32(u6, u7);
+
+  // stage 3
+  u0 = _mm_unpacklo_epi16(s2, s3);
+  u1 = _mm_unpackhi_epi16(s2, s3);
+  u2 = _mm_unpacklo_epi16(s6, s7);
+  u3 = _mm_unpackhi_epi16(s6, s7);
+
+  v0 = _mm_madd_epi16(u0, k__cospi_p16_p16);
+  v1 = _mm_madd_epi16(u1, k__cospi_p16_p16);
+  v2 = _mm_madd_epi16(u0, k__cospi_p16_m16);
+  v3 = _mm_madd_epi16(u1, k__cospi_p16_m16);
+  v4 = _mm_madd_epi16(u2, k__cospi_p16_p16);
+  v5 = _mm_madd_epi16(u3, k__cospi_p16_p16);
+  v6 = _mm_madd_epi16(u2, k__cospi_p16_m16);
+  v7 = _mm_madd_epi16(u3, k__cospi_p16_m16);
+
+  u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);
+  u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);
+  u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);
+  u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);
+  u4 = _mm_add_epi32(v4, k__DCT_CONST_ROUNDING);
+  u5 = _mm_add_epi32(v5, k__DCT_CONST_ROUNDING);
+  u6 = _mm_add_epi32(v6, k__DCT_CONST_ROUNDING);
+  u7 = _mm_add_epi32(v7, k__DCT_CONST_ROUNDING);
+
+  v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);
+  v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);
+  v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);
+  v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);
+  v4 = _mm_srai_epi32(u4, DCT_CONST_BITS);
+  v5 = _mm_srai_epi32(u5, DCT_CONST_BITS);
+  v6 = _mm_srai_epi32(u6, DCT_CONST_BITS);
+  v7 = _mm_srai_epi32(u7, DCT_CONST_BITS);
+
+  s2 = _mm_packs_epi32(v0, v1);
+  s3 = _mm_packs_epi32(v2, v3);
+  s6 = _mm_packs_epi32(v4, v5);
+  s7 = _mm_packs_epi32(v6, v7);
+
+  in[0] = s0;
+  in[1] = _mm_sub_epi16(k__const_0, s4);
+  in[2] = s6;
+  in[3] = _mm_sub_epi16(k__const_0, s2);
+  in[4] = s3;
+  in[5] = _mm_sub_epi16(k__const_0, s7);
+  in[6] = s5;
+  in[7] = _mm_sub_epi16(k__const_0, s1);
+}
+
+void vp9_idct8x8_12_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
+  const __m128i zero = _mm_setzero_si128();
+  const __m128i rounding = _mm_set1_epi32(DCT_CONST_ROUNDING);
+  const __m128i final_rounding = _mm_set1_epi16(1 << 4);
+  const __m128i stg1_0 = pair_set_epi16(cospi_28_64, -cospi_4_64);
+  const __m128i stg1_1 = pair_set_epi16(cospi_4_64, cospi_28_64);
+  const __m128i stg1_2 = pair_set_epi16(-cospi_20_64, cospi_12_64);
+  const __m128i stg1_3 = pair_set_epi16(cospi_12_64, cospi_20_64);
+  const __m128i stg2_0 = pair_set_epi16(cospi_16_64, cospi_16_64);
+  const __m128i stg2_1 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+  const __m128i stg2_2 = pair_set_epi16(cospi_24_64, -cospi_8_64);
+  const __m128i stg2_3 = pair_set_epi16(cospi_8_64, cospi_24_64);
+  const __m128i stg3_0 = pair_set_epi16(-cospi_16_64, cospi_16_64);
+
+  __m128i in0, in1, in2, in3, in4, in5, in6, in7;
+  __m128i stp1_0, stp1_1, stp1_2, stp1_3, stp1_4, stp1_5, stp1_6, stp1_7;
+  __m128i stp2_0, stp2_1, stp2_2, stp2_3, stp2_4, stp2_5, stp2_6, stp2_7;
+  __m128i tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
+
+  // Rows. Load 4-row input data.
+  in0 = _mm_load_si128((const __m128i *)input);
+  in1 = _mm_load_si128((const __m128i *)(input + 8 * 1));
+  in2 = _mm_load_si128((const __m128i *)(input + 8 * 2));
+  in3 = _mm_load_si128((const __m128i *)(input + 8 * 3));
+
+  // 8x4 Transpose
+  TRANSPOSE_8X8_10(in0, in1, in2, in3, in0, in1);
+  // Stage1
+  {
+    const __m128i lo_17 = _mm_unpackhi_epi16(in0, zero);
+    const __m128i lo_35 = _mm_unpackhi_epi16(in1, zero);
+
+    tmp0 = _mm_madd_epi16(lo_17, stg1_0);
+    tmp2 = _mm_madd_epi16(lo_17, stg1_1);
+    tmp4 = _mm_madd_epi16(lo_35, stg1_2);
+    tmp6 = _mm_madd_epi16(lo_35, stg1_3);
+
+    tmp0 = _mm_add_epi32(tmp0, rounding);
+    tmp2 = _mm_add_epi32(tmp2, rounding);
+    tmp4 = _mm_add_epi32(tmp4, rounding);
+    tmp6 = _mm_add_epi32(tmp6, rounding);
+    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS);
+    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS);
+    tmp4 = _mm_srai_epi32(tmp4, DCT_CONST_BITS);
+    tmp6 = _mm_srai_epi32(tmp6, DCT_CONST_BITS);
+
+    stp1_4 = _mm_packs_epi32(tmp0, tmp2);
+    stp1_5 = _mm_packs_epi32(tmp4, tmp6);
+  }
+
+  // Stage2
+  {
+    const __m128i lo_04 = _mm_unpacklo_epi16(in0, zero);
+    const __m128i lo_26 = _mm_unpacklo_epi16(in1, zero);
+
+    tmp0 = _mm_madd_epi16(lo_04, stg2_0);
+    tmp2 = _mm_madd_epi16(lo_04, stg2_1);
+    tmp4 = _mm_madd_epi16(lo_26, stg2_2);
+    tmp6 = _mm_madd_epi16(lo_26, stg2_3);
+
+    tmp0 = _mm_add_epi32(tmp0, rounding);
+    tmp2 = _mm_add_epi32(tmp2, rounding);
+    tmp4 = _mm_add_epi32(tmp4, rounding);
+    tmp6 = _mm_add_epi32(tmp6, rounding);
+    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS);
+    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS);
+    tmp4 = _mm_srai_epi32(tmp4, DCT_CONST_BITS);
+    tmp6 = _mm_srai_epi32(tmp6, DCT_CONST_BITS);
+
+    stp2_0 = _mm_packs_epi32(tmp0, tmp2);
+    stp2_2 = _mm_packs_epi32(tmp6, tmp4);
+
+    tmp0 = _mm_adds_epi16(stp1_4, stp1_5);
+    tmp1 = _mm_subs_epi16(stp1_4, stp1_5);
+
+    stp2_4 = tmp0;
+    stp2_5 = _mm_unpacklo_epi64(tmp1, zero);
+    stp2_6 = _mm_unpackhi_epi64(tmp1, zero);
+  }
+
+  // Stage3
+  {
+    const __m128i lo_56 = _mm_unpacklo_epi16(stp2_5, stp2_6);
+
+    tmp4 = _mm_adds_epi16(stp2_0, stp2_2);
+    tmp6 = _mm_subs_epi16(stp2_0, stp2_2);
+
+    stp1_2 = _mm_unpackhi_epi64(tmp6, tmp4);
+    stp1_3 = _mm_unpacklo_epi64(tmp6, tmp4);
+
+    tmp0 = _mm_madd_epi16(lo_56, stg3_0);
+    tmp2 = _mm_madd_epi16(lo_56, stg2_0);  // stg3_1 = stg2_0
+
+    tmp0 = _mm_add_epi32(tmp0, rounding);
+    tmp2 = _mm_add_epi32(tmp2, rounding);
+    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS);
+    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS);
+
+    stp1_5 = _mm_packs_epi32(tmp0, tmp2);
+  }
+
+  // Stage4
+  tmp0 = _mm_adds_epi16(stp1_3, stp2_4);
+  tmp1 = _mm_adds_epi16(stp1_2, stp1_5);
+  tmp2 = _mm_subs_epi16(stp1_3, stp2_4);
+  tmp3 = _mm_subs_epi16(stp1_2, stp1_5);
+
+  TRANSPOSE_4X8_10(tmp0, tmp1, tmp2, tmp3, in0, in1, in2, in3)
+
+  IDCT8(in0, in1, in2, in3, zero, zero, zero, zero,
+        in0, in1, in2, in3, in4, in5, in6, in7);
+  // Final rounding and shift
+  in0 = _mm_adds_epi16(in0, final_rounding);
+  in1 = _mm_adds_epi16(in1, final_rounding);
+  in2 = _mm_adds_epi16(in2, final_rounding);
+  in3 = _mm_adds_epi16(in3, final_rounding);
+  in4 = _mm_adds_epi16(in4, final_rounding);
+  in5 = _mm_adds_epi16(in5, final_rounding);
+  in6 = _mm_adds_epi16(in6, final_rounding);
+  in7 = _mm_adds_epi16(in7, final_rounding);
+
+  in0 = _mm_srai_epi16(in0, 5);
+  in1 = _mm_srai_epi16(in1, 5);
+  in2 = _mm_srai_epi16(in2, 5);
+  in3 = _mm_srai_epi16(in3, 5);
+  in4 = _mm_srai_epi16(in4, 5);
+  in5 = _mm_srai_epi16(in5, 5);
+  in6 = _mm_srai_epi16(in6, 5);
+  in7 = _mm_srai_epi16(in7, 5);
+
+  RECON_AND_STORE(dest + 0 * stride, in0);
+  RECON_AND_STORE(dest + 1 * stride, in1);
+  RECON_AND_STORE(dest + 2 * stride, in2);
+  RECON_AND_STORE(dest + 3 * stride, in3);
+  RECON_AND_STORE(dest + 4 * stride, in4);
+  RECON_AND_STORE(dest + 5 * stride, in5);
+  RECON_AND_STORE(dest + 6 * stride, in6);
+  RECON_AND_STORE(dest + 7 * stride, in7);
+}
+
+#define IDCT16 \
+  /* Stage2 */ \
+  { \
+    const __m128i lo_1_15 = _mm_unpacklo_epi16(in[1], in[15]); \
+    const __m128i hi_1_15 = _mm_unpackhi_epi16(in[1], in[15]); \
+    const __m128i lo_9_7 = _mm_unpacklo_epi16(in[9], in[7]);   \
+    const __m128i hi_9_7 = _mm_unpackhi_epi16(in[9], in[7]);   \
+    const __m128i lo_5_11 = _mm_unpacklo_epi16(in[5], in[11]); \
+    const __m128i hi_5_11 = _mm_unpackhi_epi16(in[5], in[11]); \
+    const __m128i lo_13_3 = _mm_unpacklo_epi16(in[13], in[3]); \
+    const __m128i hi_13_3 = _mm_unpackhi_epi16(in[13], in[3]); \
+    \
+    MULTIPLICATION_AND_ADD(lo_1_15, hi_1_15, lo_9_7, hi_9_7, \
+                           stg2_0, stg2_1, stg2_2, stg2_3, \
+                           stp2_8, stp2_15, stp2_9, stp2_14) \
+    \
+    MULTIPLICATION_AND_ADD(lo_5_11, hi_5_11, lo_13_3, hi_13_3, \
+                           stg2_4, stg2_5, stg2_6, stg2_7, \
+                           stp2_10, stp2_13, stp2_11, stp2_12) \
+  } \
+    \
+  /* Stage3 */ \
+  { \
+    const __m128i lo_2_14 = _mm_unpacklo_epi16(in[2], in[14]); \
+    const __m128i hi_2_14 = _mm_unpackhi_epi16(in[2], in[14]); \
+    const __m128i lo_10_6 = _mm_unpacklo_epi16(in[10], in[6]); \
+    const __m128i hi_10_6 = _mm_unpackhi_epi16(in[10], in[6]); \
+    \
+    MULTIPLICATION_AND_ADD(lo_2_14, hi_2_14, lo_10_6, hi_10_6, \
+                           stg3_0, stg3_1, stg3_2, stg3_3, \
+                           stp1_4, stp1_7, stp1_5, stp1_6) \
+    \
+    stp1_8_0 = _mm_add_epi16(stp2_8, stp2_9);  \
+    stp1_9 = _mm_sub_epi16(stp2_8, stp2_9);    \
+    stp1_10 = _mm_sub_epi16(stp2_11, stp2_10); \
+    stp1_11 = _mm_add_epi16(stp2_11, stp2_10); \
+    \
+    stp1_12_0 = _mm_add_epi16(stp2_12, stp2_13); \
+    stp1_13 = _mm_sub_epi16(stp2_12, stp2_13); \
+    stp1_14 = _mm_sub_epi16(stp2_15, stp2_14); \
+    stp1_15 = _mm_add_epi16(stp2_15, stp2_14); \
+  } \
+  \
+  /* Stage4 */ \
+  { \
+    const __m128i lo_0_8 = _mm_unpacklo_epi16(in[0], in[8]); \
+    const __m128i hi_0_8 = _mm_unpackhi_epi16(in[0], in[8]); \
+    const __m128i lo_4_12 = _mm_unpacklo_epi16(in[4], in[12]); \
+    const __m128i hi_4_12 = _mm_unpackhi_epi16(in[4], in[12]); \
+    \
+    const __m128i lo_9_14 = _mm_unpacklo_epi16(stp1_9, stp1_14); \
+    const __m128i hi_9_14 = _mm_unpackhi_epi16(stp1_9, stp1_14); \
+    const __m128i lo_10_13 = _mm_unpacklo_epi16(stp1_10, stp1_13); \
+    const __m128i hi_10_13 = _mm_unpackhi_epi16(stp1_10, stp1_13); \
+    \
+    MULTIPLICATION_AND_ADD(lo_0_8, hi_0_8, lo_4_12, hi_4_12, \
+                           stg4_0, stg4_1, stg4_2, stg4_3, \
+                           stp2_0, stp2_1, stp2_2, stp2_3) \
+    \
+    stp2_4 = _mm_add_epi16(stp1_4, stp1_5); \
+    stp2_5 = _mm_sub_epi16(stp1_4, stp1_5); \
+    stp2_6 = _mm_sub_epi16(stp1_7, stp1_6); \
+    stp2_7 = _mm_add_epi16(stp1_7, stp1_6); \
+    \
+    MULTIPLICATION_AND_ADD(lo_9_14, hi_9_14, lo_10_13, hi_10_13, \
+                           stg4_4, stg4_5, stg4_6, stg4_7, \
+                           stp2_9, stp2_14, stp2_10, stp2_13) \
+  } \
+    \
+  /* Stage5 */ \
+  { \
+    const __m128i lo_6_5 = _mm_unpacklo_epi16(stp2_6, stp2_5); \
+    const __m128i hi_6_5 = _mm_unpackhi_epi16(stp2_6, stp2_5); \
+    \
+    stp1_0 = _mm_add_epi16(stp2_0, stp2_3); \
+    stp1_1 = _mm_add_epi16(stp2_1, stp2_2); \
+    stp1_2 = _mm_sub_epi16(stp2_1, stp2_2); \
+    stp1_3 = _mm_sub_epi16(stp2_0, stp2_3); \
+    \
+    tmp0 = _mm_madd_epi16(lo_6_5, stg4_1); \
+    tmp1 = _mm_madd_epi16(hi_6_5, stg4_1); \
+    tmp2 = _mm_madd_epi16(lo_6_5, stg4_0); \
+    tmp3 = _mm_madd_epi16(hi_6_5, stg4_0); \
+    \
+    tmp0 = _mm_add_epi32(tmp0, rounding); \
+    tmp1 = _mm_add_epi32(tmp1, rounding); \
+    tmp2 = _mm_add_epi32(tmp2, rounding); \
+    tmp3 = _mm_add_epi32(tmp3, rounding); \
+    \
+    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS); \
+    tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS); \
+    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS); \
+    tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS); \
+    \
+    stp1_5 = _mm_packs_epi32(tmp0, tmp1); \
+    stp1_6 = _mm_packs_epi32(tmp2, tmp3); \
+    \
+    stp1_8 = _mm_add_epi16(stp1_8_0, stp1_11);  \
+    stp1_9 = _mm_add_epi16(stp2_9, stp2_10);    \
+    stp1_10 = _mm_sub_epi16(stp2_9, stp2_10);   \
+    stp1_11 = _mm_sub_epi16(stp1_8_0, stp1_11); \
+    \
+    stp1_12 = _mm_sub_epi16(stp1_15, stp1_12_0); \
+    stp1_13 = _mm_sub_epi16(stp2_14, stp2_13);   \
+    stp1_14 = _mm_add_epi16(stp2_14, stp2_13);   \
+    stp1_15 = _mm_add_epi16(stp1_15, stp1_12_0); \
+  } \
+    \
+  /* Stage6 */ \
+  { \
+    const __m128i lo_10_13 = _mm_unpacklo_epi16(stp1_10, stp1_13); \
+    const __m128i hi_10_13 = _mm_unpackhi_epi16(stp1_10, stp1_13); \
+    const __m128i lo_11_12 = _mm_unpacklo_epi16(stp1_11, stp1_12); \
+    const __m128i hi_11_12 = _mm_unpackhi_epi16(stp1_11, stp1_12); \
+    \
+    stp2_0 = _mm_add_epi16(stp1_0, stp2_7); \
+    stp2_1 = _mm_add_epi16(stp1_1, stp1_6); \
+    stp2_2 = _mm_add_epi16(stp1_2, stp1_5); \
+    stp2_3 = _mm_add_epi16(stp1_3, stp2_4); \
+    stp2_4 = _mm_sub_epi16(stp1_3, stp2_4); \
+    stp2_5 = _mm_sub_epi16(stp1_2, stp1_5); \
+    stp2_6 = _mm_sub_epi16(stp1_1, stp1_6); \
+    stp2_7 = _mm_sub_epi16(stp1_0, stp2_7); \
+    \
+    MULTIPLICATION_AND_ADD(lo_10_13, hi_10_13, lo_11_12, hi_11_12, \
+                           stg6_0, stg4_0, stg6_0, stg4_0, \
+                           stp2_10, stp2_13, stp2_11, stp2_12) \
+  }
+
+#define IDCT16_10 \
+    /* Stage2 */ \
+    { \
+      const __m128i lo_1_15 = _mm_unpacklo_epi16(in[1], zero); \
+      const __m128i hi_1_15 = _mm_unpackhi_epi16(in[1], zero); \
+      const __m128i lo_13_3 = _mm_unpacklo_epi16(zero, in[3]); \
+      const __m128i hi_13_3 = _mm_unpackhi_epi16(zero, in[3]); \
+      \
+      MULTIPLICATION_AND_ADD(lo_1_15, hi_1_15, lo_13_3, hi_13_3, \
+                             stg2_0, stg2_1, stg2_6, stg2_7, \
+                             stp1_8_0, stp1_15, stp1_11, stp1_12_0) \
+    } \
+      \
+    /* Stage3 */ \
+    { \
+      const __m128i lo_2_14 = _mm_unpacklo_epi16(in[2], zero); \
+      const __m128i hi_2_14 = _mm_unpackhi_epi16(in[2], zero); \
+      \
+      MULTIPLICATION_AND_ADD_2(lo_2_14, hi_2_14, \
+                               stg3_0, stg3_1,  \
+                               stp2_4, stp2_7) \
+      \
+      stp1_9  =  stp1_8_0; \
+      stp1_10 =  stp1_11;  \
+      \
+      stp1_13 = stp1_12_0; \
+      stp1_14 = stp1_15;   \
+    } \
+    \
+    /* Stage4 */ \
+    { \
+      const __m128i lo_0_8 = _mm_unpacklo_epi16(in[0], zero); \
+      const __m128i hi_0_8 = _mm_unpackhi_epi16(in[0], zero); \
+      \
+      const __m128i lo_9_14 = _mm_unpacklo_epi16(stp1_9, stp1_14); \
+      const __m128i hi_9_14 = _mm_unpackhi_epi16(stp1_9, stp1_14); \
+      const __m128i lo_10_13 = _mm_unpacklo_epi16(stp1_10, stp1_13); \
+      const __m128i hi_10_13 = _mm_unpackhi_epi16(stp1_10, stp1_13); \
+      \
+      MULTIPLICATION_AND_ADD_2(lo_0_8, hi_0_8, \
+                               stg4_0, stg4_1, \
+                               stp1_0, stp1_1) \
+      stp2_5 = stp2_4; \
+      stp2_6 = stp2_7; \
+      \
+      MULTIPLICATION_AND_ADD(lo_9_14, hi_9_14, lo_10_13, hi_10_13, \
+                             stg4_4, stg4_5, stg4_6, stg4_7, \
+                             stp2_9, stp2_14, stp2_10, stp2_13) \
+    } \
+      \
+    /* Stage5 */ \
+    { \
+      const __m128i lo_6_5 = _mm_unpacklo_epi16(stp2_6, stp2_5); \
+      const __m128i hi_6_5 = _mm_unpackhi_epi16(stp2_6, stp2_5); \
+      \
+      stp1_2 = stp1_1; \
+      stp1_3 = stp1_0; \
+      \
+      tmp0 = _mm_madd_epi16(lo_6_5, stg4_1); \
+      tmp1 = _mm_madd_epi16(hi_6_5, stg4_1); \
+      tmp2 = _mm_madd_epi16(lo_6_5, stg4_0); \
+      tmp3 = _mm_madd_epi16(hi_6_5, stg4_0); \
+      \
+      tmp0 = _mm_add_epi32(tmp0, rounding); \
+      tmp1 = _mm_add_epi32(tmp1, rounding); \
+      tmp2 = _mm_add_epi32(tmp2, rounding); \
+      tmp3 = _mm_add_epi32(tmp3, rounding); \
+      \
+      tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS); \
+      tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS); \
+      tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS); \
+      tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS); \
+      \
+      stp1_5 = _mm_packs_epi32(tmp0, tmp1); \
+      stp1_6 = _mm_packs_epi32(tmp2, tmp3); \
+      \
+      stp1_8 = _mm_add_epi16(stp1_8_0, stp1_11);  \
+      stp1_9 = _mm_add_epi16(stp2_9, stp2_10);    \
+      stp1_10 = _mm_sub_epi16(stp2_9, stp2_10);   \
+      stp1_11 = _mm_sub_epi16(stp1_8_0, stp1_11); \
+      \
+      stp1_12 = _mm_sub_epi16(stp1_15, stp1_12_0); \
+      stp1_13 = _mm_sub_epi16(stp2_14, stp2_13);   \
+      stp1_14 = _mm_add_epi16(stp2_14, stp2_13);   \
+      stp1_15 = _mm_add_epi16(stp1_15, stp1_12_0); \
+    } \
+      \
+    /* Stage6 */ \
+    { \
+      const __m128i lo_10_13 = _mm_unpacklo_epi16(stp1_10, stp1_13); \
+      const __m128i hi_10_13 = _mm_unpackhi_epi16(stp1_10, stp1_13); \
+      const __m128i lo_11_12 = _mm_unpacklo_epi16(stp1_11, stp1_12); \
+      const __m128i hi_11_12 = _mm_unpackhi_epi16(stp1_11, stp1_12); \
+      \
+      stp2_0 = _mm_add_epi16(stp1_0, stp2_7); \
+      stp2_1 = _mm_add_epi16(stp1_1, stp1_6); \
+      stp2_2 = _mm_add_epi16(stp1_2, stp1_5); \
+      stp2_3 = _mm_add_epi16(stp1_3, stp2_4); \
+      stp2_4 = _mm_sub_epi16(stp1_3, stp2_4); \
+      stp2_5 = _mm_sub_epi16(stp1_2, stp1_5); \
+      stp2_6 = _mm_sub_epi16(stp1_1, stp1_6); \
+      stp2_7 = _mm_sub_epi16(stp1_0, stp2_7); \
+      \
+      MULTIPLICATION_AND_ADD(lo_10_13, hi_10_13, lo_11_12, hi_11_12, \
+                             stg6_0, stg4_0, stg6_0, stg4_0, \
+                             stp2_10, stp2_13, stp2_11, stp2_12) \
+    }
+
+void vp9_idct16x16_256_add_sse2(const int16_t *input, uint8_t *dest,
+                                int stride) {
+  const __m128i rounding = _mm_set1_epi32(DCT_CONST_ROUNDING);
+  const __m128i final_rounding = _mm_set1_epi16(1 << 5);
+  const __m128i zero = _mm_setzero_si128();
+
+  const __m128i stg2_0 = pair_set_epi16(cospi_30_64, -cospi_2_64);
+  const __m128i stg2_1 = pair_set_epi16(cospi_2_64, cospi_30_64);
+  const __m128i stg2_2 = pair_set_epi16(cospi_14_64, -cospi_18_64);
+  const __m128i stg2_3 = pair_set_epi16(cospi_18_64, cospi_14_64);
+  const __m128i stg2_4 = pair_set_epi16(cospi_22_64, -cospi_10_64);
+  const __m128i stg2_5 = pair_set_epi16(cospi_10_64, cospi_22_64);
+  const __m128i stg2_6 = pair_set_epi16(cospi_6_64, -cospi_26_64);
+  const __m128i stg2_7 = pair_set_epi16(cospi_26_64, cospi_6_64);
+
+  const __m128i stg3_0 = pair_set_epi16(cospi_28_64, -cospi_4_64);
+  const __m128i stg3_1 = pair_set_epi16(cospi_4_64, cospi_28_64);
+  const __m128i stg3_2 = pair_set_epi16(cospi_12_64, -cospi_20_64);
+  const __m128i stg3_3 = pair_set_epi16(cospi_20_64, cospi_12_64);
+
+  const __m128i stg4_0 = pair_set_epi16(cospi_16_64, cospi_16_64);
+  const __m128i stg4_1 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+  const __m128i stg4_2 = pair_set_epi16(cospi_24_64, -cospi_8_64);
+  const __m128i stg4_3 = pair_set_epi16(cospi_8_64, cospi_24_64);
+  const __m128i stg4_4 = pair_set_epi16(-cospi_8_64, cospi_24_64);
+  const __m128i stg4_5 = pair_set_epi16(cospi_24_64, cospi_8_64);
+  const __m128i stg4_6 = pair_set_epi16(-cospi_24_64, -cospi_8_64);
+  const __m128i stg4_7 = pair_set_epi16(-cospi_8_64, cospi_24_64);
+
+  const __m128i stg6_0 = pair_set_epi16(-cospi_16_64, cospi_16_64);
+
+  __m128i in[16], l[16], r[16], *curr1;
+  __m128i stp1_0, stp1_1, stp1_2, stp1_3, stp1_4, stp1_5, stp1_6, stp1_7,
+          stp1_8, stp1_9, stp1_10, stp1_11, stp1_12, stp1_13, stp1_14, stp1_15,
+          stp1_8_0, stp1_12_0;
+  __m128i stp2_0, stp2_1, stp2_2, stp2_3, stp2_4, stp2_5, stp2_6, stp2_7,
+          stp2_8, stp2_9, stp2_10, stp2_11, stp2_12, stp2_13, stp2_14, stp2_15;
+  __m128i tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
+  int i;
+
+  curr1 = l;
+  for (i = 0; i < 2; i++) {
+    // 1-D idct
+
+    // Load input data.
+    in[0] = _mm_load_si128((const __m128i *)input);
+    in[8] = _mm_load_si128((const __m128i *)(input + 8 * 1));
+    in[1] = _mm_load_si128((const __m128i *)(input + 8 * 2));
+    in[9] = _mm_load_si128((const __m128i *)(input + 8 * 3));
+    in[2] = _mm_load_si128((const __m128i *)(input + 8 * 4));
+    in[10] = _mm_load_si128((const __m128i *)(input + 8 * 5));
+    in[3] = _mm_load_si128((const __m128i *)(input + 8 * 6));
+    in[11] = _mm_load_si128((const __m128i *)(input + 8 * 7));
+    in[4] = _mm_load_si128((const __m128i *)(input + 8 * 8));
+    in[12] = _mm_load_si128((const __m128i *)(input + 8 * 9));
+    in[5] = _mm_load_si128((const __m128i *)(input + 8 * 10));
+    in[13] = _mm_load_si128((const __m128i *)(input + 8 * 11));
+    in[6] = _mm_load_si128((const __m128i *)(input + 8 * 12));
+    in[14] = _mm_load_si128((const __m128i *)(input + 8 * 13));
+    in[7] = _mm_load_si128((const __m128i *)(input + 8 * 14));
+    in[15] = _mm_load_si128((const __m128i *)(input + 8 * 15));
+
+    array_transpose_8x8(in, in);
+    array_transpose_8x8(in + 8, in + 8);
+
+    IDCT16
+
+    // Stage7
+    curr1[0] = _mm_add_epi16(stp2_0, stp1_15);
+    curr1[1] = _mm_add_epi16(stp2_1, stp1_14);
+    curr1[2] = _mm_add_epi16(stp2_2, stp2_13);
+    curr1[3] = _mm_add_epi16(stp2_3, stp2_12);
+    curr1[4] = _mm_add_epi16(stp2_4, stp2_11);
+    curr1[5] = _mm_add_epi16(stp2_5, stp2_10);
+    curr1[6] = _mm_add_epi16(stp2_6, stp1_9);
+    curr1[7] = _mm_add_epi16(stp2_7, stp1_8);
+    curr1[8] = _mm_sub_epi16(stp2_7, stp1_8);
+    curr1[9] = _mm_sub_epi16(stp2_6, stp1_9);
+    curr1[10] = _mm_sub_epi16(stp2_5, stp2_10);
+    curr1[11] = _mm_sub_epi16(stp2_4, stp2_11);
+    curr1[12] = _mm_sub_epi16(stp2_3, stp2_12);
+    curr1[13] = _mm_sub_epi16(stp2_2, stp2_13);
+    curr1[14] = _mm_sub_epi16(stp2_1, stp1_14);
+    curr1[15] = _mm_sub_epi16(stp2_0, stp1_15);
+
+    curr1 = r;
+    input += 128;
+  }
+  for (i = 0; i < 2; i++) {
+    int j;
+    // 1-D idct
+    array_transpose_8x8(l + i * 8, in);
+    array_transpose_8x8(r + i * 8, in + 8);
+
+    IDCT16
+
+    // 2-D
+    in[0] = _mm_add_epi16(stp2_0, stp1_15);
+    in[1] = _mm_add_epi16(stp2_1, stp1_14);
+    in[2] = _mm_add_epi16(stp2_2, stp2_13);
+    in[3] = _mm_add_epi16(stp2_3, stp2_12);
+    in[4] = _mm_add_epi16(stp2_4, stp2_11);
+    in[5] = _mm_add_epi16(stp2_5, stp2_10);
+    in[6] = _mm_add_epi16(stp2_6, stp1_9);
+    in[7] = _mm_add_epi16(stp2_7, stp1_8);
+    in[8] = _mm_sub_epi16(stp2_7, stp1_8);
+    in[9] = _mm_sub_epi16(stp2_6, stp1_9);
+    in[10] = _mm_sub_epi16(stp2_5, stp2_10);
+    in[11] = _mm_sub_epi16(stp2_4, stp2_11);
+    in[12] = _mm_sub_epi16(stp2_3, stp2_12);
+    in[13] = _mm_sub_epi16(stp2_2, stp2_13);
+    in[14] = _mm_sub_epi16(stp2_1, stp1_14);
+    in[15] = _mm_sub_epi16(stp2_0, stp1_15);
+
+    for (j = 0; j < 16; ++j) {
+      // Final rounding and shift
+      in[j] = _mm_adds_epi16(in[j], final_rounding);
+      in[j] = _mm_srai_epi16(in[j], 6);
+      RECON_AND_STORE(dest + j * stride, in[j]);
+    }
+
+    dest += 8;
+  }
+}
+
+void vp9_idct16x16_1_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
+  __m128i dc_value;
+  const __m128i zero = _mm_setzero_si128();
+  int a, i;
+
+  a = dct_const_round_shift(input[0] * cospi_16_64);
+  a = dct_const_round_shift(a * cospi_16_64);
+  a = ROUND_POWER_OF_TWO(a, 6);
+
+  dc_value = _mm_set1_epi16(a);
+
+  for (i = 0; i < 2; ++i) {
+    RECON_AND_STORE(dest +  0 * stride, dc_value);
+    RECON_AND_STORE(dest +  1 * stride, dc_value);
+    RECON_AND_STORE(dest +  2 * stride, dc_value);
+    RECON_AND_STORE(dest +  3 * stride, dc_value);
+    RECON_AND_STORE(dest +  4 * stride, dc_value);
+    RECON_AND_STORE(dest +  5 * stride, dc_value);
+    RECON_AND_STORE(dest +  6 * stride, dc_value);
+    RECON_AND_STORE(dest +  7 * stride, dc_value);
+    RECON_AND_STORE(dest +  8 * stride, dc_value);
+    RECON_AND_STORE(dest +  9 * stride, dc_value);
+    RECON_AND_STORE(dest + 10 * stride, dc_value);
+    RECON_AND_STORE(dest + 11 * stride, dc_value);
+    RECON_AND_STORE(dest + 12 * stride, dc_value);
+    RECON_AND_STORE(dest + 13 * stride, dc_value);
+    RECON_AND_STORE(dest + 14 * stride, dc_value);
+    RECON_AND_STORE(dest + 15 * stride, dc_value);
+    dest += 8;
+  }
+}
+
+static void iadst16_8col(__m128i *in) {
+  // perform 16x16 1-D ADST for 8 columns
+  __m128i s[16], x[16], u[32], v[32];
+  const __m128i k__cospi_p01_p31 = pair_set_epi16(cospi_1_64, cospi_31_64);
+  const __m128i k__cospi_p31_m01 = pair_set_epi16(cospi_31_64, -cospi_1_64);
+  const __m128i k__cospi_p05_p27 = pair_set_epi16(cospi_5_64, cospi_27_64);
+  const __m128i k__cospi_p27_m05 = pair_set_epi16(cospi_27_64, -cospi_5_64);
+  const __m128i k__cospi_p09_p23 = pair_set_epi16(cospi_9_64, cospi_23_64);
+  const __m128i k__cospi_p23_m09 = pair_set_epi16(cospi_23_64, -cospi_9_64);
+  const __m128i k__cospi_p13_p19 = pair_set_epi16(cospi_13_64, cospi_19_64);
+  const __m128i k__cospi_p19_m13 = pair_set_epi16(cospi_19_64, -cospi_13_64);
+  const __m128i k__cospi_p17_p15 = pair_set_epi16(cospi_17_64, cospi_15_64);
+  const __m128i k__cospi_p15_m17 = pair_set_epi16(cospi_15_64, -cospi_17_64);
+  const __m128i k__cospi_p21_p11 = pair_set_epi16(cospi_21_64, cospi_11_64);
+  const __m128i k__cospi_p11_m21 = pair_set_epi16(cospi_11_64, -cospi_21_64);
+  const __m128i k__cospi_p25_p07 = pair_set_epi16(cospi_25_64, cospi_7_64);
+  const __m128i k__cospi_p07_m25 = pair_set_epi16(cospi_7_64, -cospi_25_64);
+  const __m128i k__cospi_p29_p03 = pair_set_epi16(cospi_29_64, cospi_3_64);
+  const __m128i k__cospi_p03_m29 = pair_set_epi16(cospi_3_64, -cospi_29_64);
+  const __m128i k__cospi_p04_p28 = pair_set_epi16(cospi_4_64, cospi_28_64);
+  const __m128i k__cospi_p28_m04 = pair_set_epi16(cospi_28_64, -cospi_4_64);
+  const __m128i k__cospi_p20_p12 = pair_set_epi16(cospi_20_64, cospi_12_64);
+  const __m128i k__cospi_p12_m20 = pair_set_epi16(cospi_12_64, -cospi_20_64);
+  const __m128i k__cospi_m28_p04 = pair_set_epi16(-cospi_28_64, cospi_4_64);
+  const __m128i k__cospi_m12_p20 = pair_set_epi16(-cospi_12_64, cospi_20_64);
+  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);
+  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);
+  const __m128i k__cospi_m24_p08 = pair_set_epi16(-cospi_24_64, cospi_8_64);
+  const __m128i k__cospi_m16_m16 = _mm_set1_epi16((int16_t)-cospi_16_64);
+  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);
+  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+  const __m128i k__cospi_m16_p16 = pair_set_epi16(-cospi_16_64, cospi_16_64);
+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
+  const __m128i kZero = _mm_set1_epi16(0);
+
+  u[0] = _mm_unpacklo_epi16(in[15], in[0]);
+  u[1] = _mm_unpackhi_epi16(in[15], in[0]);
+  u[2] = _mm_unpacklo_epi16(in[13], in[2]);
+  u[3] = _mm_unpackhi_epi16(in[13], in[2]);
+  u[4] = _mm_unpacklo_epi16(in[11], in[4]);
+  u[5] = _mm_unpackhi_epi16(in[11], in[4]);
+  u[6] = _mm_unpacklo_epi16(in[9], in[6]);
+  u[7] = _mm_unpackhi_epi16(in[9], in[6]);
+  u[8] = _mm_unpacklo_epi16(in[7], in[8]);
+  u[9] = _mm_unpackhi_epi16(in[7], in[8]);
+  u[10] = _mm_unpacklo_epi16(in[5], in[10]);
+  u[11] = _mm_unpackhi_epi16(in[5], in[10]);
+  u[12] = _mm_unpacklo_epi16(in[3], in[12]);
+  u[13] = _mm_unpackhi_epi16(in[3], in[12]);
+  u[14] = _mm_unpacklo_epi16(in[1], in[14]);
+  u[15] = _mm_unpackhi_epi16(in[1], in[14]);
+
+  v[0] = _mm_madd_epi16(u[0], k__cospi_p01_p31);
+  v[1] = _mm_madd_epi16(u[1], k__cospi_p01_p31);
+  v[2] = _mm_madd_epi16(u[0], k__cospi_p31_m01);
+  v[3] = _mm_madd_epi16(u[1], k__cospi_p31_m01);
+  v[4] = _mm_madd_epi16(u[2], k__cospi_p05_p27);
+  v[5] = _mm_madd_epi16(u[3], k__cospi_p05_p27);
+  v[6] = _mm_madd_epi16(u[2], k__cospi_p27_m05);
+  v[7] = _mm_madd_epi16(u[3], k__cospi_p27_m05);
+  v[8] = _mm_madd_epi16(u[4], k__cospi_p09_p23);
+  v[9] = _mm_madd_epi16(u[5], k__cospi_p09_p23);
+  v[10] = _mm_madd_epi16(u[4], k__cospi_p23_m09);
+  v[11] = _mm_madd_epi16(u[5], k__cospi_p23_m09);
+  v[12] = _mm_madd_epi16(u[6], k__cospi_p13_p19);
+  v[13] = _mm_madd_epi16(u[7], k__cospi_p13_p19);
+  v[14] = _mm_madd_epi16(u[6], k__cospi_p19_m13);
+  v[15] = _mm_madd_epi16(u[7], k__cospi_p19_m13);
+  v[16] = _mm_madd_epi16(u[8], k__cospi_p17_p15);
+  v[17] = _mm_madd_epi16(u[9], k__cospi_p17_p15);
+  v[18] = _mm_madd_epi16(u[8], k__cospi_p15_m17);
+  v[19] = _mm_madd_epi16(u[9], k__cospi_p15_m17);
+  v[20] = _mm_madd_epi16(u[10], k__cospi_p21_p11);
+  v[21] = _mm_madd_epi16(u[11], k__cospi_p21_p11);
+  v[22] = _mm_madd_epi16(u[10], k__cospi_p11_m21);
+  v[23] = _mm_madd_epi16(u[11], k__cospi_p11_m21);
+  v[24] = _mm_madd_epi16(u[12], k__cospi_p25_p07);
+  v[25] = _mm_madd_epi16(u[13], k__cospi_p25_p07);
+  v[26] = _mm_madd_epi16(u[12], k__cospi_p07_m25);
+  v[27] = _mm_madd_epi16(u[13], k__cospi_p07_m25);
+  v[28] = _mm_madd_epi16(u[14], k__cospi_p29_p03);
+  v[29] = _mm_madd_epi16(u[15], k__cospi_p29_p03);
+  v[30] = _mm_madd_epi16(u[14], k__cospi_p03_m29);
+  v[31] = _mm_madd_epi16(u[15], k__cospi_p03_m29);
+
+  u[0] = _mm_add_epi32(v[0], v[16]);
+  u[1] = _mm_add_epi32(v[1], v[17]);
+  u[2] = _mm_add_epi32(v[2], v[18]);
+  u[3] = _mm_add_epi32(v[3], v[19]);
+  u[4] = _mm_add_epi32(v[4], v[20]);
+  u[5] = _mm_add_epi32(v[5], v[21]);
+  u[6] = _mm_add_epi32(v[6], v[22]);
+  u[7] = _mm_add_epi32(v[7], v[23]);
+  u[8] = _mm_add_epi32(v[8], v[24]);
+  u[9] = _mm_add_epi32(v[9], v[25]);
+  u[10] = _mm_add_epi32(v[10], v[26]);
+  u[11] = _mm_add_epi32(v[11], v[27]);
+  u[12] = _mm_add_epi32(v[12], v[28]);
+  u[13] = _mm_add_epi32(v[13], v[29]);
+  u[14] = _mm_add_epi32(v[14], v[30]);
+  u[15] = _mm_add_epi32(v[15], v[31]);
+  u[16] = _mm_sub_epi32(v[0], v[16]);
+  u[17] = _mm_sub_epi32(v[1], v[17]);
+  u[18] = _mm_sub_epi32(v[2], v[18]);
+  u[19] = _mm_sub_epi32(v[3], v[19]);
+  u[20] = _mm_sub_epi32(v[4], v[20]);
+  u[21] = _mm_sub_epi32(v[5], v[21]);
+  u[22] = _mm_sub_epi32(v[6], v[22]);
+  u[23] = _mm_sub_epi32(v[7], v[23]);
+  u[24] = _mm_sub_epi32(v[8], v[24]);
+  u[25] = _mm_sub_epi32(v[9], v[25]);
+  u[26] = _mm_sub_epi32(v[10], v[26]);
+  u[27] = _mm_sub_epi32(v[11], v[27]);
+  u[28] = _mm_sub_epi32(v[12], v[28]);
+  u[29] = _mm_sub_epi32(v[13], v[29]);
+  u[30] = _mm_sub_epi32(v[14], v[30]);
+  u[31] = _mm_sub_epi32(v[15], v[31]);
+
+  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);
+  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);
+  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);
+  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);
+  v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);
+  v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);
+  v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);
+  v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);
+  v[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);
+  v[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);
+  v[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);
+  v[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);
+  v[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);
+  v[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);
+  v[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);
+  v[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);
+  v[16] = _mm_add_epi32(u[16], k__DCT_CONST_ROUNDING);
+  v[17] = _mm_add_epi32(u[17], k__DCT_CONST_ROUNDING);
+  v[18] = _mm_add_epi32(u[18], k__DCT_CONST_ROUNDING);
+  v[19] = _mm_add_epi32(u[19], k__DCT_CONST_ROUNDING);
+  v[20] = _mm_add_epi32(u[20], k__DCT_CONST_ROUNDING);
+  v[21] = _mm_add_epi32(u[21], k__DCT_CONST_ROUNDING);
+  v[22] = _mm_add_epi32(u[22], k__DCT_CONST_ROUNDING);
+  v[23] = _mm_add_epi32(u[23], k__DCT_CONST_ROUNDING);
+  v[24] = _mm_add_epi32(u[24], k__DCT_CONST_ROUNDING);
+  v[25] = _mm_add_epi32(u[25], k__DCT_CONST_ROUNDING);
+  v[26] = _mm_add_epi32(u[26], k__DCT_CONST_ROUNDING);
+  v[27] = _mm_add_epi32(u[27], k__DCT_CONST_ROUNDING);
+  v[28] = _mm_add_epi32(u[28], k__DCT_CONST_ROUNDING);
+  v[29] = _mm_add_epi32(u[29], k__DCT_CONST_ROUNDING);
+  v[30] = _mm_add_epi32(u[30], k__DCT_CONST_ROUNDING);
+  v[31] = _mm_add_epi32(u[31], k__DCT_CONST_ROUNDING);
+
+  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);
+  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);
+  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);
+  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);
+  u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);
+  u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);
+  u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);
+  u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);
+  u[8] = _mm_srai_epi32(v[8], DCT_CONST_BITS);
+  u[9] = _mm_srai_epi32(v[9], DCT_CONST_BITS);
+  u[10] = _mm_srai_epi32(v[10], DCT_CONST_BITS);
+  u[11] = _mm_srai_epi32(v[11], DCT_CONST_BITS);
+  u[12] = _mm_srai_epi32(v[12], DCT_CONST_BITS);
+  u[13] = _mm_srai_epi32(v[13], DCT_CONST_BITS);
+  u[14] = _mm_srai_epi32(v[14], DCT_CONST_BITS);
+  u[15] = _mm_srai_epi32(v[15], DCT_CONST_BITS);
+  u[16] = _mm_srai_epi32(v[16], DCT_CONST_BITS);
+  u[17] = _mm_srai_epi32(v[17], DCT_CONST_BITS);
+  u[18] = _mm_srai_epi32(v[18], DCT_CONST_BITS);
+  u[19] = _mm_srai_epi32(v[19], DCT_CONST_BITS);
+  u[20] = _mm_srai_epi32(v[20], DCT_CONST_BITS);
+  u[21] = _mm_srai_epi32(v[21], DCT_CONST_BITS);
+  u[22] = _mm_srai_epi32(v[22], DCT_CONST_BITS);
+  u[23] = _mm_srai_epi32(v[23], DCT_CONST_BITS);
+  u[24] = _mm_srai_epi32(v[24], DCT_CONST_BITS);
+  u[25] = _mm_srai_epi32(v[25], DCT_CONST_BITS);
+  u[26] = _mm_srai_epi32(v[26], DCT_CONST_BITS);
+  u[27] = _mm_srai_epi32(v[27], DCT_CONST_BITS);
+  u[28] = _mm_srai_epi32(v[28], DCT_CONST_BITS);
+  u[29] = _mm_srai_epi32(v[29], DCT_CONST_BITS);
+  u[30] = _mm_srai_epi32(v[30], DCT_CONST_BITS);
+  u[31] = _mm_srai_epi32(v[31], DCT_CONST_BITS);
+
+  s[0] = _mm_packs_epi32(u[0], u[1]);
+  s[1] = _mm_packs_epi32(u[2], u[3]);
+  s[2] = _mm_packs_epi32(u[4], u[5]);
+  s[3] = _mm_packs_epi32(u[6], u[7]);
+  s[4] = _mm_packs_epi32(u[8], u[9]);
+  s[5] = _mm_packs_epi32(u[10], u[11]);
+  s[6] = _mm_packs_epi32(u[12], u[13]);
+  s[7] = _mm_packs_epi32(u[14], u[15]);
+  s[8] = _mm_packs_epi32(u[16], u[17]);
+  s[9] = _mm_packs_epi32(u[18], u[19]);
+  s[10] = _mm_packs_epi32(u[20], u[21]);
+  s[11] = _mm_packs_epi32(u[22], u[23]);
+  s[12] = _mm_packs_epi32(u[24], u[25]);
+  s[13] = _mm_packs_epi32(u[26], u[27]);
+  s[14] = _mm_packs_epi32(u[28], u[29]);
+  s[15] = _mm_packs_epi32(u[30], u[31]);
+
+  // stage 2
+  u[0] = _mm_unpacklo_epi16(s[8], s[9]);
+  u[1] = _mm_unpackhi_epi16(s[8], s[9]);
+  u[2] = _mm_unpacklo_epi16(s[10], s[11]);
+  u[3] = _mm_unpackhi_epi16(s[10], s[11]);
+  u[4] = _mm_unpacklo_epi16(s[12], s[13]);
+  u[5] = _mm_unpackhi_epi16(s[12], s[13]);
+  u[6] = _mm_unpacklo_epi16(s[14], s[15]);
+  u[7] = _mm_unpackhi_epi16(s[14], s[15]);
+
+  v[0] = _mm_madd_epi16(u[0], k__cospi_p04_p28);
+  v[1] = _mm_madd_epi16(u[1], k__cospi_p04_p28);
+  v[2] = _mm_madd_epi16(u[0], k__cospi_p28_m04);
+  v[3] = _mm_madd_epi16(u[1], k__cospi_p28_m04);
+  v[4] = _mm_madd_epi16(u[2], k__cospi_p20_p12);
+  v[5] = _mm_madd_epi16(u[3], k__cospi_p20_p12);
+  v[6] = _mm_madd_epi16(u[2], k__cospi_p12_m20);
+  v[7] = _mm_madd_epi16(u[3], k__cospi_p12_m20);
+  v[8] = _mm_madd_epi16(u[4], k__cospi_m28_p04);
+  v[9] = _mm_madd_epi16(u[5], k__cospi_m28_p04);
+  v[10] = _mm_madd_epi16(u[4], k__cospi_p04_p28);
+  v[11] = _mm_madd_epi16(u[5], k__cospi_p04_p28);
+  v[12] = _mm_madd_epi16(u[6], k__cospi_m12_p20);
+  v[13] = _mm_madd_epi16(u[7], k__cospi_m12_p20);
+  v[14] = _mm_madd_epi16(u[6], k__cospi_p20_p12);
+  v[15] = _mm_madd_epi16(u[7], k__cospi_p20_p12);
+
+  u[0] = _mm_add_epi32(v[0], v[8]);
+  u[1] = _mm_add_epi32(v[1], v[9]);
+  u[2] = _mm_add_epi32(v[2], v[10]);
+  u[3] = _mm_add_epi32(v[3], v[11]);
+  u[4] = _mm_add_epi32(v[4], v[12]);
+  u[5] = _mm_add_epi32(v[5], v[13]);
+  u[6] = _mm_add_epi32(v[6], v[14]);
+  u[7] = _mm_add_epi32(v[7], v[15]);
+  u[8] = _mm_sub_epi32(v[0], v[8]);
+  u[9] = _mm_sub_epi32(v[1], v[9]);
+  u[10] = _mm_sub_epi32(v[2], v[10]);
+  u[11] = _mm_sub_epi32(v[3], v[11]);
+  u[12] = _mm_sub_epi32(v[4], v[12]);
+  u[13] = _mm_sub_epi32(v[5], v[13]);
+  u[14] = _mm_sub_epi32(v[6], v[14]);
+  u[15] = _mm_sub_epi32(v[7], v[15]);
+
+  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);
+  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);
+  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);
+  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);
+  v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);
+  v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);
+  v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);
+  v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);
+  v[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);
+  v[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);
+  v[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);
+  v[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);
+  v[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);
+  v[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);
+  v[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);
+  v[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);
+
+  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);
+  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);
+  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);
+  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);
+  u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);
+  u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);
+  u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);
+  u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);
+  u[8] = _mm_srai_epi32(v[8], DCT_CONST_BITS);
+  u[9] = _mm_srai_epi32(v[9], DCT_CONST_BITS);
+  u[10] = _mm_srai_epi32(v[10], DCT_CONST_BITS);
+  u[11] = _mm_srai_epi32(v[11], DCT_CONST_BITS);
+  u[12] = _mm_srai_epi32(v[12], DCT_CONST_BITS);
+  u[13] = _mm_srai_epi32(v[13], DCT_CONST_BITS);
+  u[14] = _mm_srai_epi32(v[14], DCT_CONST_BITS);
+  u[15] = _mm_srai_epi32(v[15], DCT_CONST_BITS);
+
+  x[0] = _mm_add_epi16(s[0], s[4]);
+  x[1] = _mm_add_epi16(s[1], s[5]);
+  x[2] = _mm_add_epi16(s[2], s[6]);
+  x[3] = _mm_add_epi16(s[3], s[7]);
+  x[4] = _mm_sub_epi16(s[0], s[4]);
+  x[5] = _mm_sub_epi16(s[1], s[5]);
+  x[6] = _mm_sub_epi16(s[2], s[6]);
+  x[7] = _mm_sub_epi16(s[3], s[7]);
+  x[8] = _mm_packs_epi32(u[0], u[1]);
+  x[9] = _mm_packs_epi32(u[2], u[3]);
+  x[10] = _mm_packs_epi32(u[4], u[5]);
+  x[11] = _mm_packs_epi32(u[6], u[7]);
+  x[12] = _mm_packs_epi32(u[8], u[9]);
+  x[13] = _mm_packs_epi32(u[10], u[11]);
+  x[14] = _mm_packs_epi32(u[12], u[13]);
+  x[15] = _mm_packs_epi32(u[14], u[15]);
+
+  // stage 3
+  u[0] = _mm_unpacklo_epi16(x[4], x[5]);
+  u[1] = _mm_unpackhi_epi16(x[4], x[5]);
+  u[2] = _mm_unpacklo_epi16(x[6], x[7]);
+  u[3] = _mm_unpackhi_epi16(x[6], x[7]);
+  u[4] = _mm_unpacklo_epi16(x[12], x[13]);
+  u[5] = _mm_unpackhi_epi16(x[12], x[13]);
+  u[6] = _mm_unpacklo_epi16(x[14], x[15]);
+  u[7] = _mm_unpackhi_epi16(x[14], x[15]);
+
+  v[0] = _mm_madd_epi16(u[0], k__cospi_p08_p24);
+  v[1] = _mm_madd_epi16(u[1], k__cospi_p08_p24);
+  v[2] = _mm_madd_epi16(u[0], k__cospi_p24_m08);
+  v[3] = _mm_madd_epi16(u[1], k__cospi_p24_m08);
+  v[4] = _mm_madd_epi16(u[2], k__cospi_m24_p08);
+  v[5] = _mm_madd_epi16(u[3], k__cospi_m24_p08);
+  v[6] = _mm_madd_epi16(u[2], k__cospi_p08_p24);
+  v[7] = _mm_madd_epi16(u[3], k__cospi_p08_p24);
+  v[8] = _mm_madd_epi16(u[4], k__cospi_p08_p24);
+  v[9] = _mm_madd_epi16(u[5], k__cospi_p08_p24);
+  v[10] = _mm_madd_epi16(u[4], k__cospi_p24_m08);
+  v[11] = _mm_madd_epi16(u[5], k__cospi_p24_m08);
+  v[12] = _mm_madd_epi16(u[6], k__cospi_m24_p08);
+  v[13] = _mm_madd_epi16(u[7], k__cospi_m24_p08);
+  v[14] = _mm_madd_epi16(u[6], k__cospi_p08_p24);
+  v[15] = _mm_madd_epi16(u[7], k__cospi_p08_p24);
+
+  u[0] = _mm_add_epi32(v[0], v[4]);
+  u[1] = _mm_add_epi32(v[1], v[5]);
+  u[2] = _mm_add_epi32(v[2], v[6]);
+  u[3] = _mm_add_epi32(v[3], v[7]);
+  u[4] = _mm_sub_epi32(v[0], v[4]);
+  u[5] = _mm_sub_epi32(v[1], v[5]);
+  u[6] = _mm_sub_epi32(v[2], v[6]);
+  u[7] = _mm_sub_epi32(v[3], v[7]);
+  u[8] = _mm_add_epi32(v[8], v[12]);
+  u[9] = _mm_add_epi32(v[9], v[13]);
+  u[10] = _mm_add_epi32(v[10], v[14]);
+  u[11] = _mm_add_epi32(v[11], v[15]);
+  u[12] = _mm_sub_epi32(v[8], v[12]);
+  u[13] = _mm_sub_epi32(v[9], v[13]);
+  u[14] = _mm_sub_epi32(v[10], v[14]);
+  u[15] = _mm_sub_epi32(v[11], v[15]);
+
+  u[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);
+  u[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);
+  u[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);
+  u[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);
+  u[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);
+  u[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);
+  u[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);
+  u[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);
+  u[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);
+  u[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);
+  u[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);
+  u[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);
+  u[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);
+  u[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);
+  u[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);
+  u[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);
+
+  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
+  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
+  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
+  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
+  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);
+  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);
+  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);
+  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);
+  v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);
+  v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);
+  v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);
+  v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);
+  v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);
+  v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);
+  v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);
+  v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);
+
+  s[0] = _mm_add_epi16(x[0], x[2]);
+  s[1] = _mm_add_epi16(x[1], x[3]);
+  s[2] = _mm_sub_epi16(x[0], x[2]);
+  s[3] = _mm_sub_epi16(x[1], x[3]);
+  s[4] = _mm_packs_epi32(v[0], v[1]);
+  s[5] = _mm_packs_epi32(v[2], v[3]);
+  s[6] = _mm_packs_epi32(v[4], v[5]);
+  s[7] = _mm_packs_epi32(v[6], v[7]);
+  s[8] = _mm_add_epi16(x[8], x[10]);
+  s[9] = _mm_add_epi16(x[9], x[11]);
+  s[10] = _mm_sub_epi16(x[8], x[10]);
+  s[11] = _mm_sub_epi16(x[9], x[11]);
+  s[12] = _mm_packs_epi32(v[8], v[9]);
+  s[13] = _mm_packs_epi32(v[10], v[11]);
+  s[14] = _mm_packs_epi32(v[12], v[13]);
+  s[15] = _mm_packs_epi32(v[14], v[15]);
+
+  // stage 4
+  u[0] = _mm_unpacklo_epi16(s[2], s[3]);
+  u[1] = _mm_unpackhi_epi16(s[2], s[3]);
+  u[2] = _mm_unpacklo_epi16(s[6], s[7]);
+  u[3] = _mm_unpackhi_epi16(s[6], s[7]);
+  u[4] = _mm_unpacklo_epi16(s[10], s[11]);
+  u[5] = _mm_unpackhi_epi16(s[10], s[11]);
+  u[6] = _mm_unpacklo_epi16(s[14], s[15]);
+  u[7] = _mm_unpackhi_epi16(s[14], s[15]);
+
+  v[0] = _mm_madd_epi16(u[0], k__cospi_m16_m16);
+  v[1] = _mm_madd_epi16(u[1], k__cospi_m16_m16);
+  v[2] = _mm_madd_epi16(u[0], k__cospi_p16_m16);
+  v[3] = _mm_madd_epi16(u[1], k__cospi_p16_m16);
+  v[4] = _mm_madd_epi16(u[2], k__cospi_p16_p16);
+  v[5] = _mm_madd_epi16(u[3], k__cospi_p16_p16);
+  v[6] = _mm_madd_epi16(u[2], k__cospi_m16_p16);
+  v[7] = _mm_madd_epi16(u[3], k__cospi_m16_p16);
+  v[8] = _mm_madd_epi16(u[4], k__cospi_p16_p16);
+  v[9] = _mm_madd_epi16(u[5], k__cospi_p16_p16);
+  v[10] = _mm_madd_epi16(u[4], k__cospi_m16_p16);
+  v[11] = _mm_madd_epi16(u[5], k__cospi_m16_p16);
+  v[12] = _mm_madd_epi16(u[6], k__cospi_m16_m16);
+  v[13] = _mm_madd_epi16(u[7], k__cospi_m16_m16);
+  v[14] = _mm_madd_epi16(u[6], k__cospi_p16_m16);
+  v[15] = _mm_madd_epi16(u[7], k__cospi_p16_m16);
+
+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
+  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);
+  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);
+  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);
+  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);
+  u[8] = _mm_add_epi32(v[8], k__DCT_CONST_ROUNDING);
+  u[9] = _mm_add_epi32(v[9], k__DCT_CONST_ROUNDING);
+  u[10] = _mm_add_epi32(v[10], k__DCT_CONST_ROUNDING);
+  u[11] = _mm_add_epi32(v[11], k__DCT_CONST_ROUNDING);
+  u[12] = _mm_add_epi32(v[12], k__DCT_CONST_ROUNDING);
+  u[13] = _mm_add_epi32(v[13], k__DCT_CONST_ROUNDING);
+  u[14] = _mm_add_epi32(v[14], k__DCT_CONST_ROUNDING);
+  u[15] = _mm_add_epi32(v[15], k__DCT_CONST_ROUNDING);
+
+  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
+  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
+  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
+  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
+  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);
+  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);
+  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);
+  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);
+  v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);
+  v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);
+  v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);
+  v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);
+  v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);
+  v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);
+  v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);
+  v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);
+
+  in[0] = s[0];
+  in[1] = _mm_sub_epi16(kZero, s[8]);
+  in[2] = s[12];
+  in[3] = _mm_sub_epi16(kZero, s[4]);
+  in[4] = _mm_packs_epi32(v[4], v[5]);
+  in[5] = _mm_packs_epi32(v[12], v[13]);
+  in[6] = _mm_packs_epi32(v[8], v[9]);
+  in[7] = _mm_packs_epi32(v[0], v[1]);
+  in[8] = _mm_packs_epi32(v[2], v[3]);
+  in[9] = _mm_packs_epi32(v[10], v[11]);
+  in[10] = _mm_packs_epi32(v[14], v[15]);
+  in[11] = _mm_packs_epi32(v[6], v[7]);
+  in[12] = s[5];
+  in[13] = _mm_sub_epi16(kZero, s[13]);
+  in[14] = s[9];
+  in[15] = _mm_sub_epi16(kZero, s[1]);
+}
+
+static void idct16_8col(__m128i *in) {
+  const __m128i k__cospi_p30_m02 = pair_set_epi16(cospi_30_64, -cospi_2_64);
+  const __m128i k__cospi_p02_p30 = pair_set_epi16(cospi_2_64, cospi_30_64);
+  const __m128i k__cospi_p14_m18 = pair_set_epi16(cospi_14_64, -cospi_18_64);
+  const __m128i k__cospi_p18_p14 = pair_set_epi16(cospi_18_64, cospi_14_64);
+  const __m128i k__cospi_p22_m10 = pair_set_epi16(cospi_22_64, -cospi_10_64);
+  const __m128i k__cospi_p10_p22 = pair_set_epi16(cospi_10_64, cospi_22_64);
+  const __m128i k__cospi_p06_m26 = pair_set_epi16(cospi_6_64, -cospi_26_64);
+  const __m128i k__cospi_p26_p06 = pair_set_epi16(cospi_26_64, cospi_6_64);
+  const __m128i k__cospi_p28_m04 = pair_set_epi16(cospi_28_64, -cospi_4_64);
+  const __m128i k__cospi_p04_p28 = pair_set_epi16(cospi_4_64, cospi_28_64);
+  const __m128i k__cospi_p12_m20 = pair_set_epi16(cospi_12_64, -cospi_20_64);
+  const __m128i k__cospi_p20_p12 = pair_set_epi16(cospi_20_64, cospi_12_64);
+  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);
+  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);
+  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);
+  const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);
+  const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);
+  const __m128i k__cospi_m24_m08 = pair_set_epi16(-cospi_24_64, -cospi_8_64);
+  const __m128i k__cospi_m16_p16 = pair_set_epi16(-cospi_16_64, cospi_16_64);
+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);
+  __m128i v[16], u[16], s[16], t[16];
+
+  // stage 1
+  s[0] = in[0];
+  s[1] = in[8];
+  s[2] = in[4];
+  s[3] = in[12];
+  s[4] = in[2];
+  s[5] = in[10];
+  s[6] = in[6];
+  s[7] = in[14];
+  s[8] = in[1];
+  s[9] = in[9];
+  s[10] = in[5];
+  s[11] = in[13];
+  s[12] = in[3];
+  s[13] = in[11];
+  s[14] = in[7];
+  s[15] = in[15];
+
+  // stage 2
+  u[0] = _mm_unpacklo_epi16(s[8], s[15]);
+  u[1] = _mm_unpackhi_epi16(s[8], s[15]);
+  u[2] = _mm_unpacklo_epi16(s[9], s[14]);
+  u[3] = _mm_unpackhi_epi16(s[9], s[14]);
+  u[4] = _mm_unpacklo_epi16(s[10], s[13]);
+  u[5] = _mm_unpackhi_epi16(s[10], s[13]);
+  u[6] = _mm_unpacklo_epi16(s[11], s[12]);
+  u[7] = _mm_unpackhi_epi16(s[11], s[12]);
+
+  v[0] = _mm_madd_epi16(u[0], k__cospi_p30_m02);
+  v[1] = _mm_madd_epi16(u[1], k__cospi_p30_m02);
+  v[2] = _mm_madd_epi16(u[0], k__cospi_p02_p30);
+  v[3] = _mm_madd_epi16(u[1], k__cospi_p02_p30);
+  v[4] = _mm_madd_epi16(u[2], k__cospi_p14_m18);
+  v[5] = _mm_madd_epi16(u[3], k__cospi_p14_m18);
+  v[6] = _mm_madd_epi16(u[2], k__cospi_p18_p14);
+  v[7] = _mm_madd_epi16(u[3], k__cospi_p18_p14);
+  v[8] = _mm_madd_epi16(u[4], k__cospi_p22_m10);
+  v[9] = _mm_madd_epi16(u[5], k__cospi_p22_m10);
+  v[10] = _mm_madd_epi16(u[4], k__cospi_p10_p22);
+  v[11] = _mm_madd_epi16(u[5], k__cospi_p10_p22);
+  v[12] = _mm_madd_epi16(u[6], k__cospi_p06_m26);
+  v[13] = _mm_madd_epi16(u[7], k__cospi_p06_m26);
+  v[14] = _mm_madd_epi16(u[6], k__cospi_p26_p06);
+  v[15] = _mm_madd_epi16(u[7], k__cospi_p26_p06);
+
+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
+  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);
+  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);
+  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);
+  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);
+  u[8] = _mm_add_epi32(v[8], k__DCT_CONST_ROUNDING);
+  u[9] = _mm_add_epi32(v[9], k__DCT_CONST_ROUNDING);
+  u[10] = _mm_add_epi32(v[10], k__DCT_CONST_ROUNDING);
+  u[11] = _mm_add_epi32(v[11], k__DCT_CONST_ROUNDING);
+  u[12] = _mm_add_epi32(v[12], k__DCT_CONST_ROUNDING);
+  u[13] = _mm_add_epi32(v[13], k__DCT_CONST_ROUNDING);
+  u[14] = _mm_add_epi32(v[14], k__DCT_CONST_ROUNDING);
+  u[15] = _mm_add_epi32(v[15], k__DCT_CONST_ROUNDING);
+
+  u[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
+  u[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
+  u[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
+  u[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
+  u[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);
+  u[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);
+  u[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);
+  u[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);
+  u[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);
+  u[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);
+  u[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);
+  u[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);
+  u[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);
+  u[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);
+  u[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);
+  u[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);
+
+  s[8]  = _mm_packs_epi32(u[0], u[1]);
+  s[15] = _mm_packs_epi32(u[2], u[3]);
+  s[9]  = _mm_packs_epi32(u[4], u[5]);
+  s[14] = _mm_packs_epi32(u[6], u[7]);
+  s[10] = _mm_packs_epi32(u[8], u[9]);
+  s[13] = _mm_packs_epi32(u[10], u[11]);
+  s[11] = _mm_packs_epi32(u[12], u[13]);
+  s[12] = _mm_packs_epi32(u[14], u[15]);
+
+  // stage 3
+  t[0] = s[0];
+  t[1] = s[1];
+  t[2] = s[2];
+  t[3] = s[3];
+  u[0] = _mm_unpacklo_epi16(s[4], s[7]);
+  u[1] = _mm_unpackhi_epi16(s[4], s[7]);
+  u[2] = _mm_unpacklo_epi16(s[5], s[6]);
+  u[3] = _mm_unpackhi_epi16(s[5], s[6]);
+
+  v[0] = _mm_madd_epi16(u[0], k__cospi_p28_m04);
+  v[1] = _mm_madd_epi16(u[1], k__cospi_p28_m04);
+  v[2] = _mm_madd_epi16(u[0], k__cospi_p04_p28);
+  v[3] = _mm_madd_epi16(u[1], k__cospi_p04_p28);
+  v[4] = _mm_madd_epi16(u[2], k__cospi_p12_m20);
+  v[5] = _mm_madd_epi16(u[3], k__cospi_p12_m20);
+  v[6] = _mm_madd_epi16(u[2], k__cospi_p20_p12);
+  v[7] = _mm_madd_epi16(u[3], k__cospi_p20_p12);
+
+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
+  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);
+  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);
+  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);
+  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);
+
+  u[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
+  u[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
+  u[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
+  u[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
+  u[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);
+  u[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);
+  u[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);
+  u[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);
+
+  t[4] = _mm_packs_epi32(u[0], u[1]);
+  t[7] = _mm_packs_epi32(u[2], u[3]);
+  t[5] = _mm_packs_epi32(u[4], u[5]);
+  t[6] = _mm_packs_epi32(u[6], u[7]);
+  t[8] = _mm_add_epi16(s[8], s[9]);
+  t[9] = _mm_sub_epi16(s[8], s[9]);
+  t[10] = _mm_sub_epi16(s[11], s[10]);
+  t[11] = _mm_add_epi16(s[10], s[11]);
+  t[12] = _mm_add_epi16(s[12], s[13]);
+  t[13] = _mm_sub_epi16(s[12], s[13]);
+  t[14] = _mm_sub_epi16(s[15], s[14]);
+  t[15] = _mm_add_epi16(s[14], s[15]);
+
+  // stage 4
+  u[0] = _mm_unpacklo_epi16(t[0], t[1]);
+  u[1] = _mm_unpackhi_epi16(t[0], t[1]);
+  u[2] = _mm_unpacklo_epi16(t[2], t[3]);
+  u[3] = _mm_unpackhi_epi16(t[2], t[3]);
+  u[4] = _mm_unpacklo_epi16(t[9], t[14]);
+  u[5] = _mm_unpackhi_epi16(t[9], t[14]);
+  u[6] = _mm_unpacklo_epi16(t[10], t[13]);
+  u[7] = _mm_unpackhi_epi16(t[10], t[13]);
+
+  v[0] = _mm_madd_epi16(u[0], k__cospi_p16_p16);
+  v[1] = _mm_madd_epi16(u[1], k__cospi_p16_p16);
+  v[2] = _mm_madd_epi16(u[0], k__cospi_p16_m16);
+  v[3] = _mm_madd_epi16(u[1], k__cospi_p16_m16);
+  v[4] = _mm_madd_epi16(u[2], k__cospi_p24_m08);
+  v[5] = _mm_madd_epi16(u[3], k__cospi_p24_m08);
+  v[6] = _mm_madd_epi16(u[2], k__cospi_p08_p24);
+  v[7] = _mm_madd_epi16(u[3], k__cospi_p08_p24);
+  v[8] = _mm_madd_epi16(u[4], k__cospi_m08_p24);
+  v[9] = _mm_madd_epi16(u[5], k__cospi_m08_p24);
+  v[10] = _mm_madd_epi16(u[4], k__cospi_p24_p08);
+  v[11] = _mm_madd_epi16(u[5], k__cospi_p24_p08);
+  v[12] = _mm_madd_epi16(u[6], k__cospi_m24_m08);
+  v[13] = _mm_madd_epi16(u[7], k__cospi_m24_m08);
+  v[14] = _mm_madd_epi16(u[6], k__cospi_m08_p24);
+  v[15] = _mm_madd_epi16(u[7], k__cospi_m08_p24);
+
+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
+  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);
+  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);
+  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);
+  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);
+  u[8] = _mm_add_epi32(v[8], k__DCT_CONST_ROUNDING);
+  u[9] = _mm_add_epi32(v[9], k__DCT_CONST_ROUNDING);
+  u[10] = _mm_add_epi32(v[10], k__DCT_CONST_ROUNDING);
+  u[11] = _mm_add_epi32(v[11], k__DCT_CONST_ROUNDING);
+  u[12] = _mm_add_epi32(v[12], k__DCT_CONST_ROUNDING);
+  u[13] = _mm_add_epi32(v[13], k__DCT_CONST_ROUNDING);
+  u[14] = _mm_add_epi32(v[14], k__DCT_CONST_ROUNDING);
+  u[15] = _mm_add_epi32(v[15], k__DCT_CONST_ROUNDING);
+
+  u[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
+  u[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
+  u[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
+  u[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
+  u[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);
+  u[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);
+  u[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);
+  u[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);
+  u[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);
+  u[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);
+  u[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);
+  u[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);
+  u[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);
+  u[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);
+  u[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);
+  u[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);
+
+  s[0] = _mm_packs_epi32(u[0], u[1]);
+  s[1] = _mm_packs_epi32(u[2], u[3]);
+  s[2] = _mm_packs_epi32(u[4], u[5]);
+  s[3] = _mm_packs_epi32(u[6], u[7]);
+  s[4] = _mm_add_epi16(t[4], t[5]);
+  s[5] = _mm_sub_epi16(t[4], t[5]);
+  s[6] = _mm_sub_epi16(t[7], t[6]);
+  s[7] = _mm_add_epi16(t[6], t[7]);
+  s[8] = t[8];
+  s[15] = t[15];
+  s[9]  = _mm_packs_epi32(u[8], u[9]);
+  s[14] = _mm_packs_epi32(u[10], u[11]);
+  s[10] = _mm_packs_epi32(u[12], u[13]);
+  s[13] = _mm_packs_epi32(u[14], u[15]);
+  s[11] = t[11];
+  s[12] = t[12];
+
+  // stage 5
+  t[0] = _mm_add_epi16(s[0], s[3]);
+  t[1] = _mm_add_epi16(s[1], s[2]);
+  t[2] = _mm_sub_epi16(s[1], s[2]);
+  t[3] = _mm_sub_epi16(s[0], s[3]);
+  t[4] = s[4];
+  t[7] = s[7];
+
+  u[0] = _mm_unpacklo_epi16(s[5], s[6]);
+  u[1] = _mm_unpackhi_epi16(s[5], s[6]);
+  v[0] = _mm_madd_epi16(u[0], k__cospi_m16_p16);
+  v[1] = _mm_madd_epi16(u[1], k__cospi_m16_p16);
+  v[2] = _mm_madd_epi16(u[0], k__cospi_p16_p16);
+  v[3] = _mm_madd_epi16(u[1], k__cospi_p16_p16);
+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
+  u[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
+  u[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
+  u[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
+  u[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
+  t[5] = _mm_packs_epi32(u[0], u[1]);
+  t[6] = _mm_packs_epi32(u[2], u[3]);
+
+  t[8] = _mm_add_epi16(s[8], s[11]);
+  t[9] = _mm_add_epi16(s[9], s[10]);
+  t[10] = _mm_sub_epi16(s[9], s[10]);
+  t[11] = _mm_sub_epi16(s[8], s[11]);
+  t[12] = _mm_sub_epi16(s[15], s[12]);
+  t[13] = _mm_sub_epi16(s[14], s[13]);
+  t[14] = _mm_add_epi16(s[13], s[14]);
+  t[15] = _mm_add_epi16(s[12], s[15]);
+
+  // stage 6
+  s[0] = _mm_add_epi16(t[0], t[7]);
+  s[1] = _mm_add_epi16(t[1], t[6]);
+  s[2] = _mm_add_epi16(t[2], t[5]);
+  s[3] = _mm_add_epi16(t[3], t[4]);
+  s[4] = _mm_sub_epi16(t[3], t[4]);
+  s[5] = _mm_sub_epi16(t[2], t[5]);
+  s[6] = _mm_sub_epi16(t[1], t[6]);
+  s[7] = _mm_sub_epi16(t[0], t[7]);
+  s[8] = t[8];
+  s[9] = t[9];
+
+  u[0] = _mm_unpacklo_epi16(t[10], t[13]);
+  u[1] = _mm_unpackhi_epi16(t[10], t[13]);
+  u[2] = _mm_unpacklo_epi16(t[11], t[12]);
+  u[3] = _mm_unpackhi_epi16(t[11], t[12]);
+
+  v[0] = _mm_madd_epi16(u[0], k__cospi_m16_p16);
+  v[1] = _mm_madd_epi16(u[1], k__cospi_m16_p16);
+  v[2] = _mm_madd_epi16(u[0], k__cospi_p16_p16);
+  v[3] = _mm_madd_epi16(u[1], k__cospi_p16_p16);
+  v[4] = _mm_madd_epi16(u[2], k__cospi_m16_p16);
+  v[5] = _mm_madd_epi16(u[3], k__cospi_m16_p16);
+  v[6] = _mm_madd_epi16(u[2], k__cospi_p16_p16);
+  v[7] = _mm_madd_epi16(u[3], k__cospi_p16_p16);
+
+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);
+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);
+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);
+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);
+  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);
+  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);
+  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);
+  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);
+
+  u[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);
+  u[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);
+  u[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);
+  u[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);
+  u[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);
+  u[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);
+  u[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);
+  u[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);
+
+  s[10] = _mm_packs_epi32(u[0], u[1]);
+  s[13] = _mm_packs_epi32(u[2], u[3]);
+  s[11] = _mm_packs_epi32(u[4], u[5]);
+  s[12] = _mm_packs_epi32(u[6], u[7]);
+  s[14] = t[14];
+  s[15] = t[15];
+
+  // stage 7
+  in[0] = _mm_add_epi16(s[0], s[15]);
+  in[1] = _mm_add_epi16(s[1], s[14]);
+  in[2] = _mm_add_epi16(s[2], s[13]);
+  in[3] = _mm_add_epi16(s[3], s[12]);
+  in[4] = _mm_add_epi16(s[4], s[11]);
+  in[5] = _mm_add_epi16(s[5], s[10]);
+  in[6] = _mm_add_epi16(s[6], s[9]);
+  in[7] = _mm_add_epi16(s[7], s[8]);
+  in[8] = _mm_sub_epi16(s[7], s[8]);
+  in[9] = _mm_sub_epi16(s[6], s[9]);
+  in[10] = _mm_sub_epi16(s[5], s[10]);
+  in[11] = _mm_sub_epi16(s[4], s[11]);
+  in[12] = _mm_sub_epi16(s[3], s[12]);
+  in[13] = _mm_sub_epi16(s[2], s[13]);
+  in[14] = _mm_sub_epi16(s[1], s[14]);
+  in[15] = _mm_sub_epi16(s[0], s[15]);
+}
+
+void idct16_sse2(__m128i *in0, __m128i *in1) {
+  array_transpose_16x16(in0, in1);
+  idct16_8col(in0);
+  idct16_8col(in1);
+}
+
+void iadst16_sse2(__m128i *in0, __m128i *in1) {
+  array_transpose_16x16(in0, in1);
+  iadst16_8col(in0);
+  iadst16_8col(in1);
+}
+
+void vp9_idct16x16_10_add_sse2(const int16_t *input, uint8_t *dest,
+                               int stride) {
+  const __m128i rounding = _mm_set1_epi32(DCT_CONST_ROUNDING);
+  const __m128i final_rounding = _mm_set1_epi16(1 << 5);
+  const __m128i zero = _mm_setzero_si128();
+
+  const __m128i stg2_0 = pair_set_epi16(cospi_30_64, -cospi_2_64);
+  const __m128i stg2_1 = pair_set_epi16(cospi_2_64, cospi_30_64);
+  const __m128i stg2_6 = pair_set_epi16(cospi_6_64, -cospi_26_64);
+  const __m128i stg2_7 = pair_set_epi16(cospi_26_64, cospi_6_64);
+
+  const __m128i stg3_0 = pair_set_epi16(cospi_28_64, -cospi_4_64);
+  const __m128i stg3_1 = pair_set_epi16(cospi_4_64, cospi_28_64);
+
+  const __m128i stg4_0 = pair_set_epi16(cospi_16_64, cospi_16_64);
+  const __m128i stg4_1 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+  const __m128i stg4_4 = pair_set_epi16(-cospi_8_64, cospi_24_64);
+  const __m128i stg4_5 = pair_set_epi16(cospi_24_64, cospi_8_64);
+  const __m128i stg4_6 = pair_set_epi16(-cospi_24_64, -cospi_8_64);
+  const __m128i stg4_7 = pair_set_epi16(-cospi_8_64, cospi_24_64);
+
+  const __m128i stg6_0 = pair_set_epi16(-cospi_16_64, cospi_16_64);
+  __m128i in[16], l[16];
+  __m128i stp1_0, stp1_1, stp1_2, stp1_3, stp1_4, stp1_5, stp1_6,
+          stp1_8, stp1_9, stp1_10, stp1_11, stp1_12, stp1_13, stp1_14, stp1_15,
+          stp1_8_0, stp1_12_0;
+  __m128i stp2_0, stp2_1, stp2_2, stp2_3, stp2_4, stp2_5, stp2_6, stp2_7,
+          stp2_8, stp2_9, stp2_10, stp2_11, stp2_12, stp2_13, stp2_14;
+  __m128i tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
+  int i;
+  // First 1-D inverse DCT
+  // Load input data.
+  in[0] = _mm_load_si128((const __m128i *)input);
+  in[1] = _mm_load_si128((const __m128i *)(input + 8 * 2));
+  in[2] = _mm_load_si128((const __m128i *)(input + 8 * 4));
+  in[3] = _mm_load_si128((const __m128i *)(input + 8 * 6));
+
+  TRANSPOSE_8X4(in[0], in[1], in[2], in[3], in[0], in[1]);
+
+  // Stage2
+  {
+    const __m128i lo_1_15 = _mm_unpackhi_epi16(in[0], zero);
+    const __m128i lo_13_3 = _mm_unpackhi_epi16(zero, in[1]);
+
+    tmp0 = _mm_madd_epi16(lo_1_15, stg2_0);
+    tmp2 = _mm_madd_epi16(lo_1_15, stg2_1);
+    tmp5 = _mm_madd_epi16(lo_13_3, stg2_6);
+    tmp7 = _mm_madd_epi16(lo_13_3, stg2_7);
+
+    tmp0 = _mm_add_epi32(tmp0, rounding);
+    tmp2 = _mm_add_epi32(tmp2, rounding);
+    tmp5 = _mm_add_epi32(tmp5, rounding);
+    tmp7 = _mm_add_epi32(tmp7, rounding);
+
+    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS);
+    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS);
+    tmp5 = _mm_srai_epi32(tmp5, DCT_CONST_BITS);
+    tmp7 = _mm_srai_epi32(tmp7, DCT_CONST_BITS);
+
+    stp2_8  = _mm_packs_epi32(tmp0, tmp2);
+    stp2_11 = _mm_packs_epi32(tmp5, tmp7);
+  }
+
+  // Stage3
+  {
+    const __m128i lo_2_14 = _mm_unpacklo_epi16(in[1], zero);
+
+    tmp0 = _mm_madd_epi16(lo_2_14, stg3_0);
+    tmp2 = _mm_madd_epi16(lo_2_14, stg3_1);
+
+    tmp0 = _mm_add_epi32(tmp0, rounding);
+    tmp2 = _mm_add_epi32(tmp2, rounding);
+    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS);
+    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS);
+
+    stp1_13 = _mm_unpackhi_epi64(stp2_11, zero);
+    stp1_14 = _mm_unpackhi_epi64(stp2_8, zero);
+
+    stp1_4 = _mm_packs_epi32(tmp0, tmp2);
+  }
+
+  // Stage4
+  {
+    const __m128i lo_0_8 = _mm_unpacklo_epi16(in[0], zero);
+    const __m128i lo_9_14 = _mm_unpacklo_epi16(stp2_8, stp1_14);
+    const __m128i lo_10_13 = _mm_unpacklo_epi16(stp2_11, stp1_13);
+
+    tmp0 = _mm_madd_epi16(lo_0_8, stg4_0);
+    tmp2 = _mm_madd_epi16(lo_0_8, stg4_1);
+    tmp1 = _mm_madd_epi16(lo_9_14, stg4_4);
+    tmp3 = _mm_madd_epi16(lo_9_14, stg4_5);
+    tmp5 = _mm_madd_epi16(lo_10_13, stg4_6);
+    tmp7 = _mm_madd_epi16(lo_10_13, stg4_7);
+
+    tmp0 = _mm_add_epi32(tmp0, rounding);
+    tmp2 = _mm_add_epi32(tmp2, rounding);
+    tmp1 = _mm_add_epi32(tmp1, rounding);
+    tmp3 = _mm_add_epi32(tmp3, rounding);
+    tmp5 = _mm_add_epi32(tmp5, rounding);
+    tmp7 = _mm_add_epi32(tmp7, rounding);
+
+    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS);
+    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS);
+    tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS);
+    tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS);
+    tmp5 = _mm_srai_epi32(tmp5, DCT_CONST_BITS);
+    tmp7 = _mm_srai_epi32(tmp7, DCT_CONST_BITS);
+
+    stp1_0 = _mm_packs_epi32(tmp0, tmp0);
+    stp1_1 = _mm_packs_epi32(tmp2, tmp2);
+    stp2_9 = _mm_packs_epi32(tmp1, tmp3);
+    stp2_10 = _mm_packs_epi32(tmp5, tmp7);
+
+    stp2_6 = _mm_unpackhi_epi64(stp1_4, zero);
+  }
+
+  // Stage5 and Stage6
+  {
+    tmp0 = _mm_add_epi16(stp2_8, stp2_11);
+    tmp1 = _mm_sub_epi16(stp2_8, stp2_11);
+    tmp2 = _mm_add_epi16(stp2_9, stp2_10);
+    tmp3 = _mm_sub_epi16(stp2_9, stp2_10);
+
+    stp1_9  = _mm_unpacklo_epi64(tmp2, zero);
+    stp1_10 = _mm_unpacklo_epi64(tmp3, zero);
+    stp1_8  = _mm_unpacklo_epi64(tmp0, zero);
+    stp1_11 = _mm_unpacklo_epi64(tmp1, zero);
+
+    stp1_13 = _mm_unpackhi_epi64(tmp3, zero);
+    stp1_14 = _mm_unpackhi_epi64(tmp2, zero);
+    stp1_12 = _mm_unpackhi_epi64(tmp1, zero);
+    stp1_15 = _mm_unpackhi_epi64(tmp0, zero);
+  }
+
+  // Stage6
+  {
+    const __m128i lo_6_5 = _mm_unpacklo_epi16(stp2_6, stp1_4);
+    const __m128i lo_10_13 = _mm_unpacklo_epi16(stp1_10, stp1_13);
+    const __m128i lo_11_12 = _mm_unpacklo_epi16(stp1_11, stp1_12);
+
+    tmp1 = _mm_madd_epi16(lo_6_5, stg4_1);
+    tmp3 = _mm_madd_epi16(lo_6_5, stg4_0);
+    tmp0 = _mm_madd_epi16(lo_10_13, stg6_0);
+    tmp2 = _mm_madd_epi16(lo_10_13, stg4_0);
+    tmp4 = _mm_madd_epi16(lo_11_12, stg6_0);
+    tmp6 = _mm_madd_epi16(lo_11_12, stg4_0);
+
+    tmp1 = _mm_add_epi32(tmp1, rounding);
+    tmp3 = _mm_add_epi32(tmp3, rounding);
+    tmp0 = _mm_add_epi32(tmp0, rounding);
+    tmp2 = _mm_add_epi32(tmp2, rounding);
+    tmp4 = _mm_add_epi32(tmp4, rounding);
+    tmp6 = _mm_add_epi32(tmp6, rounding);
+
+    tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS);
+    tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS);
+    tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS);
+    tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS);
+    tmp4 = _mm_srai_epi32(tmp4, DCT_CONST_BITS);
+    tmp6 = _mm_srai_epi32(tmp6, DCT_CONST_BITS);
+
+    stp1_6 = _mm_packs_epi32(tmp3, tmp1);
+
+    stp2_10 = _mm_packs_epi32(tmp0, zero);
+    stp2_13 = _mm_packs_epi32(tmp2, zero);
+    stp2_11 = _mm_packs_epi32(tmp4, zero);
+    stp2_12 = _mm_packs_epi32(tmp6, zero);
+
+    tmp0 = _mm_add_epi16(stp1_0, stp1_4);
+    tmp1 = _mm_sub_epi16(stp1_0, stp1_4);
+    tmp2 = _mm_add_epi16(stp1_1, stp1_6);
+    tmp3 = _mm_sub_epi16(stp1_1, stp1_6);
+
+    stp2_0 = _mm_unpackhi_epi64(tmp0, zero);
+    stp2_1 = _mm_unpacklo_epi64(tmp2, zero);
+    stp2_2 = _mm_unpackhi_epi64(tmp2, zero);
+    stp2_3 = _mm_unpacklo_epi64(tmp0, zero);
+    stp2_4 = _mm_unpacklo_epi64(tmp1, zero);
+    stp2_5 = _mm_unpackhi_epi64(tmp3, zero);
+    stp2_6 = _mm_unpacklo_epi64(tmp3, zero);
+    stp2_7 = _mm_unpackhi_epi64(tmp1, zero);
+  }
+
+  // Stage7. Left 8x16 only.
+  l[0] = _mm_add_epi16(stp2_0, stp1_15);
+  l[1] = _mm_add_epi16(stp2_1, stp1_14);
+  l[2] = _mm_add_epi16(stp2_2, stp2_13);
+  l[3] = _mm_add_epi16(stp2_3, stp2_12);
+  l[4] = _mm_add_epi16(stp2_4, stp2_11);
+  l[5] = _mm_add_epi16(stp2_5, stp2_10);
+  l[6] = _mm_add_epi16(stp2_6, stp1_9);
+  l[7] = _mm_add_epi16(stp2_7, stp1_8);
+  l[8] = _mm_sub_epi16(stp2_7, stp1_8);
+  l[9] = _mm_sub_epi16(stp2_6, stp1_9);
+  l[10] = _mm_sub_epi16(stp2_5, stp2_10);
+  l[11] = _mm_sub_epi16(stp2_4, stp2_11);
+  l[12] = _mm_sub_epi16(stp2_3, stp2_12);
+  l[13] = _mm_sub_epi16(stp2_2, stp2_13);
+  l[14] = _mm_sub_epi16(stp2_1, stp1_14);
+  l[15] = _mm_sub_epi16(stp2_0, stp1_15);
+
+  // Second 1-D inverse transform, performed per 8x16 block
+  for (i = 0; i < 2; i++) {
+    int j;
+    array_transpose_4X8(l + 8 * i, in);
+
+    IDCT16_10
+
+    // Stage7
+    in[0] = _mm_add_epi16(stp2_0, stp1_15);
+    in[1] = _mm_add_epi16(stp2_1, stp1_14);
+    in[2] = _mm_add_epi16(stp2_2, stp2_13);
+    in[3] = _mm_add_epi16(stp2_3, stp2_12);
+    in[4] = _mm_add_epi16(stp2_4, stp2_11);
+    in[5] = _mm_add_epi16(stp2_5, stp2_10);
+    in[6] = _mm_add_epi16(stp2_6, stp1_9);
+    in[7] = _mm_add_epi16(stp2_7, stp1_8);
+    in[8] = _mm_sub_epi16(stp2_7, stp1_8);
+    in[9] = _mm_sub_epi16(stp2_6, stp1_9);
+    in[10] = _mm_sub_epi16(stp2_5, stp2_10);
+    in[11] = _mm_sub_epi16(stp2_4, stp2_11);
+    in[12] = _mm_sub_epi16(stp2_3, stp2_12);
+    in[13] = _mm_sub_epi16(stp2_2, stp2_13);
+    in[14] = _mm_sub_epi16(stp2_1, stp1_14);
+    in[15] = _mm_sub_epi16(stp2_0, stp1_15);
+
+    for (j = 0; j < 16; ++j) {
+      // Final rounding and shift
+      in[j] = _mm_adds_epi16(in[j], final_rounding);
+      in[j] = _mm_srai_epi16(in[j], 6);
+      RECON_AND_STORE(dest + j * stride, in[j]);
+    }
+
+    dest += 8;
+  }
+}
+
+#define LOAD_DQCOEFF(reg, input) \
+  {  \
+    reg = _mm_load_si128((const __m128i *) input); \
+    input += 8; \
+  }  \
+
+#define IDCT32_34 \
+/* Stage1 */ \
+{ \
+  const __m128i zero = _mm_setzero_si128();\
+  const __m128i lo_1_31 = _mm_unpacklo_epi16(in[1], zero); \
+  const __m128i hi_1_31 = _mm_unpackhi_epi16(in[1], zero); \
+  \
+  const __m128i lo_25_7= _mm_unpacklo_epi16(zero, in[7]); \
+  const __m128i hi_25_7 = _mm_unpackhi_epi16(zero, in[7]); \
+  \
+  const __m128i lo_5_27 = _mm_unpacklo_epi16(in[5], zero); \
+  const __m128i hi_5_27 = _mm_unpackhi_epi16(in[5], zero); \
+  \
+  const __m128i lo_29_3 = _mm_unpacklo_epi16(zero, in[3]); \
+  const __m128i hi_29_3 = _mm_unpackhi_epi16(zero, in[3]); \
+  \
+  MULTIPLICATION_AND_ADD_2(lo_1_31, hi_1_31, stg1_0, \
+                         stg1_1, stp1_16, stp1_31); \
+  MULTIPLICATION_AND_ADD_2(lo_25_7, hi_25_7, stg1_6, \
+                         stg1_7, stp1_19, stp1_28); \
+  MULTIPLICATION_AND_ADD_2(lo_5_27, hi_5_27, stg1_8, \
+                         stg1_9, stp1_20, stp1_27); \
+  MULTIPLICATION_AND_ADD_2(lo_29_3, hi_29_3, stg1_14, \
+                         stg1_15, stp1_23, stp1_24); \
+} \
+\
+/* Stage2 */ \
+{ \
+  const __m128i zero = _mm_setzero_si128();\
+  const __m128i lo_2_30 = _mm_unpacklo_epi16(in[2], zero); \
+  const __m128i hi_2_30 = _mm_unpackhi_epi16(in[2], zero); \
+  \
+  const __m128i lo_26_6 = _mm_unpacklo_epi16(zero, in[6]); \
+  const __m128i hi_26_6 = _mm_unpackhi_epi16(zero, in[6]); \
+  \
+  MULTIPLICATION_AND_ADD_2(lo_2_30, hi_2_30, stg2_0, \
+                         stg2_1, stp2_8, stp2_15); \
+  MULTIPLICATION_AND_ADD_2(lo_26_6, hi_26_6, stg2_6, \
+                         stg2_7, stp2_11, stp2_12); \
+  \
+  stp2_16 = stp1_16; \
+  stp2_19 = stp1_19; \
+  \
+  stp2_20 = stp1_20; \
+  stp2_23 = stp1_23; \
+  \
+  stp2_24 = stp1_24; \
+  stp2_27 = stp1_27; \
+  \
+  stp2_28 = stp1_28; \
+  stp2_31 = stp1_31; \
+} \
+\
+/* Stage3 */ \
+{ \
+  const __m128i zero = _mm_setzero_si128();\
+  const __m128i lo_4_28 = _mm_unpacklo_epi16(in[4], zero); \
+  const __m128i hi_4_28 = _mm_unpackhi_epi16(in[4], zero); \
+  \
+  const __m128i lo_17_30 = _mm_unpacklo_epi16(stp1_16, stp1_31); \
+  const __m128i hi_17_30 = _mm_unpackhi_epi16(stp1_16, stp1_31); \
+  const __m128i lo_18_29 = _mm_unpacklo_epi16(stp1_19, stp1_28); \
+  const __m128i hi_18_29 = _mm_unpackhi_epi16(stp1_19, stp1_28); \
+  \
+  const __m128i lo_21_26 = _mm_unpacklo_epi16(stp1_20, stp1_27); \
+  const __m128i hi_21_26 = _mm_unpackhi_epi16(stp1_20, stp1_27); \
+  const __m128i lo_22_25 = _mm_unpacklo_epi16(stp1_23, stp1_24); \
+  const __m128i hi_22_25 = _mm_unpackhi_epi16(stp1_23, stp2_24); \
+  \
+  MULTIPLICATION_AND_ADD_2(lo_4_28, hi_4_28, stg3_0, \
+                         stg3_1, stp1_4, stp1_7); \
+  \
+  stp1_8 = stp2_8; \
+  stp1_11 = stp2_11; \
+  stp1_12 = stp2_12; \
+  stp1_15 = stp2_15; \
+  \
+  MULTIPLICATION_AND_ADD(lo_17_30, hi_17_30, lo_18_29, hi_18_29, stg3_4, \
+                         stg3_5, stg3_6, stg3_4, stp1_17, stp1_30, \
+                         stp1_18, stp1_29) \
+  MULTIPLICATION_AND_ADD(lo_21_26, hi_21_26, lo_22_25, hi_22_25, stg3_8, \
+                         stg3_9, stg3_10, stg3_8, stp1_21, stp1_26, \
+                         stp1_22, stp1_25) \
+  \
+  stp1_16 = stp2_16; \
+  stp1_31 = stp2_31; \
+  stp1_19 = stp2_19; \
+  stp1_20 = stp2_20; \
+  stp1_23 = stp2_23; \
+  stp1_24 = stp2_24; \
+  stp1_27 = stp2_27; \
+  stp1_28 = stp2_28; \
+} \
+\
+/* Stage4 */ \
+{ \
+  const __m128i zero = _mm_setzero_si128();\
+  const __m128i lo_0_16 = _mm_unpacklo_epi16(in[0], zero); \
+  const __m128i hi_0_16 = _mm_unpackhi_epi16(in[0], zero); \
+  \
+  const __m128i lo_9_14 = _mm_unpacklo_epi16(stp2_8, stp2_15); \
+  const __m128i hi_9_14 = _mm_unpackhi_epi16(stp2_8, stp2_15); \
+  const __m128i lo_10_13 = _mm_unpacklo_epi16(stp2_11, stp2_12); \
+  const __m128i hi_10_13 = _mm_unpackhi_epi16(stp2_11, stp2_12); \
+  \
+  MULTIPLICATION_AND_ADD_2(lo_0_16, hi_0_16, stg4_0, \
+                         stg4_1, stp2_0, stp2_1); \
+  \
+  stp2_4 = stp1_4; \
+  stp2_5 = stp1_4; \
+  stp2_6 = stp1_7; \
+  stp2_7 = stp1_7; \
+  \
+  MULTIPLICATION_AND_ADD(lo_9_14, hi_9_14, lo_10_13, hi_10_13, stg4_4, \
+                         stg4_5, stg4_6, stg4_4, stp2_9, stp2_14, \
+                         stp2_10, stp2_13) \
+  \
+  stp2_8 = stp1_8; \
+  stp2_15 = stp1_15; \
+  stp2_11 = stp1_11; \
+  stp2_12 = stp1_12; \
+  \
+  stp2_16 = _mm_add_epi16(stp1_16, stp1_19); \
+  stp2_17 = _mm_add_epi16(stp1_17, stp1_18); \
+  stp2_18 = _mm_sub_epi16(stp1_17, stp1_18); \
+  stp2_19 = _mm_sub_epi16(stp1_16, stp1_19); \
+  stp2_20 = _mm_sub_epi16(stp1_23, stp1_20); \
+  stp2_21 = _mm_sub_epi16(stp1_22, stp1_21); \
+  stp2_22 = _mm_add_epi16(stp1_22, stp1_21); \
+  stp2_23 = _mm_add_epi16(stp1_23, stp1_20); \
+  \
+  stp2_24 = _mm_add_epi16(stp1_24, stp1_27); \
+  stp2_25 = _mm_add_epi16(stp1_25, stp1_26); \
+  stp2_26 = _mm_sub_epi16(stp1_25, stp1_26); \
+  stp2_27 = _mm_sub_epi16(stp1_24, stp1_27); \
+  stp2_28 = _mm_sub_epi16(stp1_31, stp1_28); \
+  stp2_29 = _mm_sub_epi16(stp1_30, stp1_29); \
+  stp2_30 = _mm_add_epi16(stp1_29, stp1_30); \
+  stp2_31 = _mm_add_epi16(stp1_28, stp1_31); \
+} \
+\
+/* Stage5 */ \
+{ \
+  const __m128i lo_6_5 = _mm_unpacklo_epi16(stp2_6, stp2_5); \
+  const __m128i hi_6_5 = _mm_unpackhi_epi16(stp2_6, stp2_5); \
+  const __m128i lo_18_29 = _mm_unpacklo_epi16(stp2_18, stp2_29); \
+  const __m128i hi_18_29 = _mm_unpackhi_epi16(stp2_18, stp2_29); \
+  \
+  const __m128i lo_19_28 = _mm_unpacklo_epi16(stp2_19, stp2_28); \
+  const __m128i hi_19_28 = _mm_unpackhi_epi16(stp2_19, stp2_28); \
+  const __m128i lo_20_27 = _mm_unpacklo_epi16(stp2_20, stp2_27); \
+  const __m128i hi_20_27 = _mm_unpackhi_epi16(stp2_20, stp2_27); \
+  \
+  const __m128i lo_21_26 = _mm_unpacklo_epi16(stp2_21, stp2_26); \
+  const __m128i hi_21_26 = _mm_unpackhi_epi16(stp2_21, stp2_26); \
+  \
+  stp1_0 = stp2_0; \
+  stp1_1 = stp2_1; \
+  stp1_2 = stp2_1; \
+  stp1_3 = stp2_0; \
+  \
+  tmp0 = _mm_madd_epi16(lo_6_5, stg4_1); \
+  tmp1 = _mm_madd_epi16(hi_6_5, stg4_1); \
+  tmp2 = _mm_madd_epi16(lo_6_5, stg4_0); \
+  tmp3 = _mm_madd_epi16(hi_6_5, stg4_0); \
+  \
+  tmp0 = _mm_add_epi32(tmp0, rounding); \
+  tmp1 = _mm_add_epi32(tmp1, rounding); \
+  tmp2 = _mm_add_epi32(tmp2, rounding); \
+  tmp3 = _mm_add_epi32(tmp3, rounding); \
+  \
+  tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS); \
+  tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS); \
+  tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS); \
+  tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS); \
+  \
+  stp1_5 = _mm_packs_epi32(tmp0, tmp1); \
+  stp1_6 = _mm_packs_epi32(tmp2, tmp3); \
+  \
+  stp1_4 = stp2_4; \
+  stp1_7 = stp2_7; \
+  \
+  stp1_8 = _mm_add_epi16(stp2_8, stp2_11); \
+  stp1_9 = _mm_add_epi16(stp2_9, stp2_10); \
+  stp1_10 = _mm_sub_epi16(stp2_9, stp2_10); \
+  stp1_11 = _mm_sub_epi16(stp2_8, stp2_11); \
+  stp1_12 = _mm_sub_epi16(stp2_15, stp2_12); \
+  stp1_13 = _mm_sub_epi16(stp2_14, stp2_13); \
+  stp1_14 = _mm_add_epi16(stp2_14, stp2_13); \
+  stp1_15 = _mm_add_epi16(stp2_15, stp2_12); \
+  \
+  stp1_16 = stp2_16; \
+  stp1_17 = stp2_17; \
+  \
+  MULTIPLICATION_AND_ADD(lo_18_29, hi_18_29, lo_19_28, hi_19_28, stg4_4, \
+                         stg4_5, stg4_4, stg4_5, stp1_18, stp1_29, \
+                         stp1_19, stp1_28) \
+  MULTIPLICATION_AND_ADD(lo_20_27, hi_20_27, lo_21_26, hi_21_26, stg4_6, \
+                         stg4_4, stg4_6, stg4_4, stp1_20, stp1_27, \
+                         stp1_21, stp1_26) \
+  \
+  stp1_22 = stp2_22; \
+  stp1_23 = stp2_23; \
+  stp1_24 = stp2_24; \
+  stp1_25 = stp2_25; \
+  stp1_30 = stp2_30; \
+  stp1_31 = stp2_31; \
+} \
+\
+/* Stage6 */ \
+{ \
+  const __m128i lo_10_13 = _mm_unpacklo_epi16(stp1_10, stp1_13); \
+  const __m128i hi_10_13 = _mm_unpackhi_epi16(stp1_10, stp1_13); \
+  const __m128i lo_11_12 = _mm_unpacklo_epi16(stp1_11, stp1_12); \
+  const __m128i hi_11_12 = _mm_unpackhi_epi16(stp1_11, stp1_12); \
+  \
+  stp2_0 = _mm_add_epi16(stp1_0, stp1_7); \
+  stp2_1 = _mm_add_epi16(stp1_1, stp1_6); \
+  stp2_2 = _mm_add_epi16(stp1_2, stp1_5); \
+  stp2_3 = _mm_add_epi16(stp1_3, stp1_4); \
+  stp2_4 = _mm_sub_epi16(stp1_3, stp1_4); \
+  stp2_5 = _mm_sub_epi16(stp1_2, stp1_5); \
+  stp2_6 = _mm_sub_epi16(stp1_1, stp1_6); \
+  stp2_7 = _mm_sub_epi16(stp1_0, stp1_7); \
+  \
+  stp2_8 = stp1_8; \
+  stp2_9 = stp1_9; \
+  stp2_14 = stp1_14; \
+  stp2_15 = stp1_15; \
+  \
+  MULTIPLICATION_AND_ADD(lo_10_13, hi_10_13, lo_11_12, hi_11_12, \
+                         stg6_0, stg4_0, stg6_0, stg4_0, stp2_10, \
+                         stp2_13, stp2_11, stp2_12) \
+  \
+  stp2_16 = _mm_add_epi16(stp1_16, stp1_23); \
+  stp2_17 = _mm_add_epi16(stp1_17, stp1_22); \
+  stp2_18 = _mm_add_epi16(stp1_18, stp1_21); \
+  stp2_19 = _mm_add_epi16(stp1_19, stp1_20); \
+  stp2_20 = _mm_sub_epi16(stp1_19, stp1_20); \
+  stp2_21 = _mm_sub_epi16(stp1_18, stp1_21); \
+  stp2_22 = _mm_sub_epi16(stp1_17, stp1_22); \
+  stp2_23 = _mm_sub_epi16(stp1_16, stp1_23); \
+  \
+  stp2_24 = _mm_sub_epi16(stp1_31, stp1_24); \
+  stp2_25 = _mm_sub_epi16(stp1_30, stp1_25); \
+  stp2_26 = _mm_sub_epi16(stp1_29, stp1_26); \
+  stp2_27 = _mm_sub_epi16(stp1_28, stp1_27); \
+  stp2_28 = _mm_add_epi16(stp1_27, stp1_28); \
+  stp2_29 = _mm_add_epi16(stp1_26, stp1_29); \
+  stp2_30 = _mm_add_epi16(stp1_25, stp1_30); \
+  stp2_31 = _mm_add_epi16(stp1_24, stp1_31); \
+} \
+\
+/* Stage7 */ \
+{ \
+  const __m128i lo_20_27 = _mm_unpacklo_epi16(stp2_20, stp2_27); \
+  const __m128i hi_20_27 = _mm_unpackhi_epi16(stp2_20, stp2_27); \
+  const __m128i lo_21_26 = _mm_unpacklo_epi16(stp2_21, stp2_26); \
+  const __m128i hi_21_26 = _mm_unpackhi_epi16(stp2_21, stp2_26); \
+  \
+  const __m128i lo_22_25 = _mm_unpacklo_epi16(stp2_22, stp2_25); \
+  const __m128i hi_22_25 = _mm_unpackhi_epi16(stp2_22, stp2_25); \
+  const __m128i lo_23_24 = _mm_unpacklo_epi16(stp2_23, stp2_24); \
+  const __m128i hi_23_24 = _mm_unpackhi_epi16(stp2_23, stp2_24); \
+  \
+  stp1_0 = _mm_add_epi16(stp2_0, stp2_15); \
+  stp1_1 = _mm_add_epi16(stp2_1, stp2_14); \
+  stp1_2 = _mm_add_epi16(stp2_2, stp2_13); \
+  stp1_3 = _mm_add_epi16(stp2_3, stp2_12); \
+  stp1_4 = _mm_add_epi16(stp2_4, stp2_11); \
+  stp1_5 = _mm_add_epi16(stp2_5, stp2_10); \
+  stp1_6 = _mm_add_epi16(stp2_6, stp2_9); \
+  stp1_7 = _mm_add_epi16(stp2_7, stp2_8); \
+  stp1_8 = _mm_sub_epi16(stp2_7, stp2_8); \
+  stp1_9 = _mm_sub_epi16(stp2_6, stp2_9); \
+  stp1_10 = _mm_sub_epi16(stp2_5, stp2_10); \
+  stp1_11 = _mm_sub_epi16(stp2_4, stp2_11); \
+  stp1_12 = _mm_sub_epi16(stp2_3, stp2_12); \
+  stp1_13 = _mm_sub_epi16(stp2_2, stp2_13); \
+  stp1_14 = _mm_sub_epi16(stp2_1, stp2_14); \
+  stp1_15 = _mm_sub_epi16(stp2_0, stp2_15); \
+  \
+  stp1_16 = stp2_16; \
+  stp1_17 = stp2_17; \
+  stp1_18 = stp2_18; \
+  stp1_19 = stp2_19; \
+  \
+  MULTIPLICATION_AND_ADD(lo_20_27, hi_20_27, lo_21_26, hi_21_26, stg6_0, \
+                         stg4_0, stg6_0, stg4_0, stp1_20, stp1_27, \
+                         stp1_21, stp1_26) \
+  MULTIPLICATION_AND_ADD(lo_22_25, hi_22_25, lo_23_24, hi_23_24, stg6_0, \
+                         stg4_0, stg6_0, stg4_0, stp1_22, stp1_25, \
+                         stp1_23, stp1_24) \
+  \
+  stp1_28 = stp2_28; \
+  stp1_29 = stp2_29; \
+  stp1_30 = stp2_30; \
+  stp1_31 = stp2_31; \
+}
+
+
+#define IDCT32 \
+/* Stage1 */ \
+{ \
+  const __m128i lo_1_31 = _mm_unpacklo_epi16(in[1], in[31]); \
+  const __m128i hi_1_31 = _mm_unpackhi_epi16(in[1], in[31]); \
+  const __m128i lo_17_15 = _mm_unpacklo_epi16(in[17], in[15]); \
+  const __m128i hi_17_15 = _mm_unpackhi_epi16(in[17], in[15]); \
+  \
+  const __m128i lo_9_23 = _mm_unpacklo_epi16(in[9], in[23]); \
+  const __m128i hi_9_23 = _mm_unpackhi_epi16(in[9], in[23]); \
+  const __m128i lo_25_7= _mm_unpacklo_epi16(in[25], in[7]); \
+  const __m128i hi_25_7 = _mm_unpackhi_epi16(in[25], in[7]); \
+  \
+  const __m128i lo_5_27 = _mm_unpacklo_epi16(in[5], in[27]); \
+  const __m128i hi_5_27 = _mm_unpackhi_epi16(in[5], in[27]); \
+  const __m128i lo_21_11 = _mm_unpacklo_epi16(in[21], in[11]); \
+  const __m128i hi_21_11 = _mm_unpackhi_epi16(in[21], in[11]); \
+  \
+  const __m128i lo_13_19 = _mm_unpacklo_epi16(in[13], in[19]); \
+  const __m128i hi_13_19 = _mm_unpackhi_epi16(in[13], in[19]); \
+  const __m128i lo_29_3 = _mm_unpacklo_epi16(in[29], in[3]); \
+  const __m128i hi_29_3 = _mm_unpackhi_epi16(in[29], in[3]); \
+  \
+  MULTIPLICATION_AND_ADD(lo_1_31, hi_1_31, lo_17_15, hi_17_15, stg1_0, \
+                         stg1_1, stg1_2, stg1_3, stp1_16, stp1_31, \
+                         stp1_17, stp1_30) \
+  MULTIPLICATION_AND_ADD(lo_9_23, hi_9_23, lo_25_7, hi_25_7, stg1_4, \
+                         stg1_5, stg1_6, stg1_7, stp1_18, stp1_29, \
+                         stp1_19, stp1_28) \
+  MULTIPLICATION_AND_ADD(lo_5_27, hi_5_27, lo_21_11, hi_21_11, stg1_8, \
+                         stg1_9, stg1_10, stg1_11, stp1_20, stp1_27, \
+                         stp1_21, stp1_26) \
+  MULTIPLICATION_AND_ADD(lo_13_19, hi_13_19, lo_29_3, hi_29_3, stg1_12, \
+                         stg1_13, stg1_14, stg1_15, stp1_22, stp1_25, \
+                         stp1_23, stp1_24) \
+} \
+\
+/* Stage2 */ \
+{ \
+  const __m128i lo_2_30 = _mm_unpacklo_epi16(in[2], in[30]); \
+  const __m128i hi_2_30 = _mm_unpackhi_epi16(in[2], in[30]); \
+  const __m128i lo_18_14 = _mm_unpacklo_epi16(in[18], in[14]); \
+  const __m128i hi_18_14 = _mm_unpackhi_epi16(in[18], in[14]); \
+  \
+  const __m128i lo_10_22 = _mm_unpacklo_epi16(in[10], in[22]); \
+  const __m128i hi_10_22 = _mm_unpackhi_epi16(in[10], in[22]); \
+  const __m128i lo_26_6 = _mm_unpacklo_epi16(in[26], in[6]); \
+  const __m128i hi_26_6 = _mm_unpackhi_epi16(in[26], in[6]); \
+  \
+  MULTIPLICATION_AND_ADD(lo_2_30, hi_2_30, lo_18_14, hi_18_14, stg2_0, \
+                         stg2_1, stg2_2, stg2_3, stp2_8, stp2_15, stp2_9, \
+                         stp2_14) \
+  MULTIPLICATION_AND_ADD(lo_10_22, hi_10_22, lo_26_6, hi_26_6, stg2_4, \
+                         stg2_5, stg2_6, stg2_7, stp2_10, stp2_13, \
+                         stp2_11, stp2_12) \
+  \
+  stp2_16 = _mm_add_epi16(stp1_16, stp1_17); \
+  stp2_17 = _mm_sub_epi16(stp1_16, stp1_17); \
+  stp2_18 = _mm_sub_epi16(stp1_19, stp1_18); \
+  stp2_19 = _mm_add_epi16(stp1_19, stp1_18); \
+  \
+  stp2_20 = _mm_add_epi16(stp1_20, stp1_21); \
+  stp2_21 = _mm_sub_epi16(stp1_20, stp1_21); \
+  stp2_22 = _mm_sub_epi16(stp1_23, stp1_22); \
+  stp2_23 = _mm_add_epi16(stp1_23, stp1_22); \
+  \
+  stp2_24 = _mm_add_epi16(stp1_24, stp1_25); \
+  stp2_25 = _mm_sub_epi16(stp1_24, stp1_25); \
+  stp2_26 = _mm_sub_epi16(stp1_27, stp1_26); \
+  stp2_27 = _mm_add_epi16(stp1_27, stp1_26); \
+  \
+  stp2_28 = _mm_add_epi16(stp1_28, stp1_29); \
+  stp2_29 = _mm_sub_epi16(stp1_28, stp1_29); \
+  stp2_30 = _mm_sub_epi16(stp1_31, stp1_30); \
+  stp2_31 = _mm_add_epi16(stp1_31, stp1_30); \
+} \
+\
+/* Stage3 */ \
+{ \
+  const __m128i lo_4_28 = _mm_unpacklo_epi16(in[4], in[28]); \
+  const __m128i hi_4_28 = _mm_unpackhi_epi16(in[4], in[28]); \
+  const __m128i lo_20_12 = _mm_unpacklo_epi16(in[20], in[12]); \
+  const __m128i hi_20_12 = _mm_unpackhi_epi16(in[20], in[12]); \
+  \
+  const __m128i lo_17_30 = _mm_unpacklo_epi16(stp2_17, stp2_30); \
+  const __m128i hi_17_30 = _mm_unpackhi_epi16(stp2_17, stp2_30); \
+  const __m128i lo_18_29 = _mm_unpacklo_epi16(stp2_18, stp2_29); \
+  const __m128i hi_18_29 = _mm_unpackhi_epi16(stp2_18, stp2_29); \
+  \
+  const __m128i lo_21_26 = _mm_unpacklo_epi16(stp2_21, stp2_26); \
+  const __m128i hi_21_26 = _mm_unpackhi_epi16(stp2_21, stp2_26); \
+  const __m128i lo_22_25 = _mm_unpacklo_epi16(stp2_22, stp2_25); \
+  const __m128i hi_22_25 = _mm_unpackhi_epi16(stp2_22, stp2_25); \
+  \
+  MULTIPLICATION_AND_ADD(lo_4_28, hi_4_28, lo_20_12, hi_20_12, stg3_0, \
+                         stg3_1, stg3_2, stg3_3, stp1_4, stp1_7, stp1_5, \
+                         stp1_6) \
+  \
+  stp1_8 = _mm_add_epi16(stp2_8, stp2_9); \
+  stp1_9 = _mm_sub_epi16(stp2_8, stp2_9); \
+  stp1_10 = _mm_sub_epi16(stp2_11, stp2_10); \
+  stp1_11 = _mm_add_epi16(stp2_11, stp2_10); \
+  stp1_12 = _mm_add_epi16(stp2_12, stp2_13); \
+  stp1_13 = _mm_sub_epi16(stp2_12, stp2_13); \
+  stp1_14 = _mm_sub_epi16(stp2_15, stp2_14); \
+  stp1_15 = _mm_add_epi16(stp2_15, stp2_14); \
+  \
+  MULTIPLICATION_AND_ADD(lo_17_30, hi_17_30, lo_18_29, hi_18_29, stg3_4, \
+                         stg3_5, stg3_6, stg3_4, stp1_17, stp1_30, \
+                         stp1_18, stp1_29) \
+  MULTIPLICATION_AND_ADD(lo_21_26, hi_21_26, lo_22_25, hi_22_25, stg3_8, \
+                         stg3_9, stg3_10, stg3_8, stp1_21, stp1_26, \
+                         stp1_22, stp1_25) \
+  \
+  stp1_16 = stp2_16; \
+  stp1_31 = stp2_31; \
+  stp1_19 = stp2_19; \
+  stp1_20 = stp2_20; \
+  stp1_23 = stp2_23; \
+  stp1_24 = stp2_24; \
+  stp1_27 = stp2_27; \
+  stp1_28 = stp2_28; \
+} \
+\
+/* Stage4 */ \
+{ \
+  const __m128i lo_0_16 = _mm_unpacklo_epi16(in[0], in[16]); \
+  const __m128i hi_0_16 = _mm_unpackhi_epi16(in[0], in[16]); \
+  const __m128i lo_8_24 = _mm_unpacklo_epi16(in[8], in[24]); \
+  const __m128i hi_8_24 = _mm_unpackhi_epi16(in[8], in[24]); \
+  \
+  const __m128i lo_9_14 = _mm_unpacklo_epi16(stp1_9, stp1_14); \
+  const __m128i hi_9_14 = _mm_unpackhi_epi16(stp1_9, stp1_14); \
+  const __m128i lo_10_13 = _mm_unpacklo_epi16(stp1_10, stp1_13); \
+  const __m128i hi_10_13 = _mm_unpackhi_epi16(stp1_10, stp1_13); \
+  \
+  MULTIPLICATION_AND_ADD(lo_0_16, hi_0_16, lo_8_24, hi_8_24, stg4_0, \
+                         stg4_1, stg4_2, stg4_3, stp2_0, stp2_1, \
+                         stp2_2, stp2_3) \
+  \
+  stp2_4 = _mm_add_epi16(stp1_4, stp1_5); \
+  stp2_5 = _mm_sub_epi16(stp1_4, stp1_5); \
+  stp2_6 = _mm_sub_epi16(stp1_7, stp1_6); \
+  stp2_7 = _mm_add_epi16(stp1_7, stp1_6); \
+  \
+  MULTIPLICATION_AND_ADD(lo_9_14, hi_9_14, lo_10_13, hi_10_13, stg4_4, \
+                         stg4_5, stg4_6, stg4_4, stp2_9, stp2_14, \
+                         stp2_10, stp2_13) \
+  \
+  stp2_8 = stp1_8; \
+  stp2_15 = stp1_15; \
+  stp2_11 = stp1_11; \
+  stp2_12 = stp1_12; \
+  \
+  stp2_16 = _mm_add_epi16(stp1_16, stp1_19); \
+  stp2_17 = _mm_add_epi16(stp1_17, stp1_18); \
+  stp2_18 = _mm_sub_epi16(stp1_17, stp1_18); \
+  stp2_19 = _mm_sub_epi16(stp1_16, stp1_19); \
+  stp2_20 = _mm_sub_epi16(stp1_23, stp1_20); \
+  stp2_21 = _mm_sub_epi16(stp1_22, stp1_21); \
+  stp2_22 = _mm_add_epi16(stp1_22, stp1_21); \
+  stp2_23 = _mm_add_epi16(stp1_23, stp1_20); \
+  \
+  stp2_24 = _mm_add_epi16(stp1_24, stp1_27); \
+  stp2_25 = _mm_add_epi16(stp1_25, stp1_26); \
+  stp2_26 = _mm_sub_epi16(stp1_25, stp1_26); \
+  stp2_27 = _mm_sub_epi16(stp1_24, stp1_27); \
+  stp2_28 = _mm_sub_epi16(stp1_31, stp1_28); \
+  stp2_29 = _mm_sub_epi16(stp1_30, stp1_29); \
+  stp2_30 = _mm_add_epi16(stp1_29, stp1_30); \
+  stp2_31 = _mm_add_epi16(stp1_28, stp1_31); \
+} \
+\
+/* Stage5 */ \
+{ \
+  const __m128i lo_6_5 = _mm_unpacklo_epi16(stp2_6, stp2_5); \
+  const __m128i hi_6_5 = _mm_unpackhi_epi16(stp2_6, stp2_5); \
+  const __m128i lo_18_29 = _mm_unpacklo_epi16(stp2_18, stp2_29); \
+  const __m128i hi_18_29 = _mm_unpackhi_epi16(stp2_18, stp2_29); \
+  \
+  const __m128i lo_19_28 = _mm_unpacklo_epi16(stp2_19, stp2_28); \
+  const __m128i hi_19_28 = _mm_unpackhi_epi16(stp2_19, stp2_28); \
+  const __m128i lo_20_27 = _mm_unpacklo_epi16(stp2_20, stp2_27); \
+  const __m128i hi_20_27 = _mm_unpackhi_epi16(stp2_20, stp2_27); \
+  \
+  const __m128i lo_21_26 = _mm_unpacklo_epi16(stp2_21, stp2_26); \
+  const __m128i hi_21_26 = _mm_unpackhi_epi16(stp2_21, stp2_26); \
+  \
+  stp1_0 = _mm_add_epi16(stp2_0, stp2_3); \
+  stp1_1 = _mm_add_epi16(stp2_1, stp2_2); \
+  stp1_2 = _mm_sub_epi16(stp2_1, stp2_2); \
+  stp1_3 = _mm_sub_epi16(stp2_0, stp2_3); \
+  \
+  tmp0 = _mm_madd_epi16(lo_6_5, stg4_1); \
+  tmp1 = _mm_madd_epi16(hi_6_5, stg4_1); \
+  tmp2 = _mm_madd_epi16(lo_6_5, stg4_0); \
+  tmp3 = _mm_madd_epi16(hi_6_5, stg4_0); \
+  \
+  tmp0 = _mm_add_epi32(tmp0, rounding); \
+  tmp1 = _mm_add_epi32(tmp1, rounding); \
+  tmp2 = _mm_add_epi32(tmp2, rounding); \
+  tmp3 = _mm_add_epi32(tmp3, rounding); \
+  \
+  tmp0 = _mm_srai_epi32(tmp0, DCT_CONST_BITS); \
+  tmp1 = _mm_srai_epi32(tmp1, DCT_CONST_BITS); \
+  tmp2 = _mm_srai_epi32(tmp2, DCT_CONST_BITS); \
+  tmp3 = _mm_srai_epi32(tmp3, DCT_CONST_BITS); \
+  \
+  stp1_5 = _mm_packs_epi32(tmp0, tmp1); \
+  stp1_6 = _mm_packs_epi32(tmp2, tmp3); \
+  \
+  stp1_4 = stp2_4; \
+  stp1_7 = stp2_7; \
+  \
+  stp1_8 = _mm_add_epi16(stp2_8, stp2_11); \
+  stp1_9 = _mm_add_epi16(stp2_9, stp2_10); \
+  stp1_10 = _mm_sub_epi16(stp2_9, stp2_10); \
+  stp1_11 = _mm_sub_epi16(stp2_8, stp2_11); \
+  stp1_12 = _mm_sub_epi16(stp2_15, stp2_12); \
+  stp1_13 = _mm_sub_epi16(stp2_14, stp2_13); \
+  stp1_14 = _mm_add_epi16(stp2_14, stp2_13); \
+  stp1_15 = _mm_add_epi16(stp2_15, stp2_12); \
+  \
+  stp1_16 = stp2_16; \
+  stp1_17 = stp2_17; \
+  \
+  MULTIPLICATION_AND_ADD(lo_18_29, hi_18_29, lo_19_28, hi_19_28, stg4_4, \
+                         stg4_5, stg4_4, stg4_5, stp1_18, stp1_29, \
+                         stp1_19, stp1_28) \
+  MULTIPLICATION_AND_ADD(lo_20_27, hi_20_27, lo_21_26, hi_21_26, stg4_6, \
+                         stg4_4, stg4_6, stg4_4, stp1_20, stp1_27, \
+                         stp1_21, stp1_26) \
+  \
+  stp1_22 = stp2_22; \
+  stp1_23 = stp2_23; \
+  stp1_24 = stp2_24; \
+  stp1_25 = stp2_25; \
+  stp1_30 = stp2_30; \
+  stp1_31 = stp2_31; \
+} \
+\
+/* Stage6 */ \
+{ \
+  const __m128i lo_10_13 = _mm_unpacklo_epi16(stp1_10, stp1_13); \
+  const __m128i hi_10_13 = _mm_unpackhi_epi16(stp1_10, stp1_13); \
+  const __m128i lo_11_12 = _mm_unpacklo_epi16(stp1_11, stp1_12); \
+  const __m128i hi_11_12 = _mm_unpackhi_epi16(stp1_11, stp1_12); \
+  \
+  stp2_0 = _mm_add_epi16(stp1_0, stp1_7); \
+  stp2_1 = _mm_add_epi16(stp1_1, stp1_6); \
+  stp2_2 = _mm_add_epi16(stp1_2, stp1_5); \
+  stp2_3 = _mm_add_epi16(stp1_3, stp1_4); \
+  stp2_4 = _mm_sub_epi16(stp1_3, stp1_4); \
+  stp2_5 = _mm_sub_epi16(stp1_2, stp1_5); \
+  stp2_6 = _mm_sub_epi16(stp1_1, stp1_6); \
+  stp2_7 = _mm_sub_epi16(stp1_0, stp1_7); \
+  \
+  stp2_8 = stp1_8; \
+  stp2_9 = stp1_9; \
+  stp2_14 = stp1_14; \
+  stp2_15 = stp1_15; \
+  \
+  MULTIPLICATION_AND_ADD(lo_10_13, hi_10_13, lo_11_12, hi_11_12, \
+                         stg6_0, stg4_0, stg6_0, stg4_0, stp2_10, \
+                         stp2_13, stp2_11, stp2_12) \
+  \
+  stp2_16 = _mm_add_epi16(stp1_16, stp1_23); \
+  stp2_17 = _mm_add_epi16(stp1_17, stp1_22); \
+  stp2_18 = _mm_add_epi16(stp1_18, stp1_21); \
+  stp2_19 = _mm_add_epi16(stp1_19, stp1_20); \
+  stp2_20 = _mm_sub_epi16(stp1_19, stp1_20); \
+  stp2_21 = _mm_sub_epi16(stp1_18, stp1_21); \
+  stp2_22 = _mm_sub_epi16(stp1_17, stp1_22); \
+  stp2_23 = _mm_sub_epi16(stp1_16, stp1_23); \
+  \
+  stp2_24 = _mm_sub_epi16(stp1_31, stp1_24); \
+  stp2_25 = _mm_sub_epi16(stp1_30, stp1_25); \
+  stp2_26 = _mm_sub_epi16(stp1_29, stp1_26); \
+  stp2_27 = _mm_sub_epi16(stp1_28, stp1_27); \
+  stp2_28 = _mm_add_epi16(stp1_27, stp1_28); \
+  stp2_29 = _mm_add_epi16(stp1_26, stp1_29); \
+  stp2_30 = _mm_add_epi16(stp1_25, stp1_30); \
+  stp2_31 = _mm_add_epi16(stp1_24, stp1_31); \
+} \
+\
+/* Stage7 */ \
+{ \
+  const __m128i lo_20_27 = _mm_unpacklo_epi16(stp2_20, stp2_27); \
+  const __m128i hi_20_27 = _mm_unpackhi_epi16(stp2_20, stp2_27); \
+  const __m128i lo_21_26 = _mm_unpacklo_epi16(stp2_21, stp2_26); \
+  const __m128i hi_21_26 = _mm_unpackhi_epi16(stp2_21, stp2_26); \
+  \
+  const __m128i lo_22_25 = _mm_unpacklo_epi16(stp2_22, stp2_25); \
+  const __m128i hi_22_25 = _mm_unpackhi_epi16(stp2_22, stp2_25); \
+  const __m128i lo_23_24 = _mm_unpacklo_epi16(stp2_23, stp2_24); \
+  const __m128i hi_23_24 = _mm_unpackhi_epi16(stp2_23, stp2_24); \
+  \
+  stp1_0 = _mm_add_epi16(stp2_0, stp2_15); \
+  stp1_1 = _mm_add_epi16(stp2_1, stp2_14); \
+  stp1_2 = _mm_add_epi16(stp2_2, stp2_13); \
+  stp1_3 = _mm_add_epi16(stp2_3, stp2_12); \
+  stp1_4 = _mm_add_epi16(stp2_4, stp2_11); \
+  stp1_5 = _mm_add_epi16(stp2_5, stp2_10); \
+  stp1_6 = _mm_add_epi16(stp2_6, stp2_9); \
+  stp1_7 = _mm_add_epi16(stp2_7, stp2_8); \
+  stp1_8 = _mm_sub_epi16(stp2_7, stp2_8); \
+  stp1_9 = _mm_sub_epi16(stp2_6, stp2_9); \
+  stp1_10 = _mm_sub_epi16(stp2_5, stp2_10); \
+  stp1_11 = _mm_sub_epi16(stp2_4, stp2_11); \
+  stp1_12 = _mm_sub_epi16(stp2_3, stp2_12); \
+  stp1_13 = _mm_sub_epi16(stp2_2, stp2_13); \
+  stp1_14 = _mm_sub_epi16(stp2_1, stp2_14); \
+  stp1_15 = _mm_sub_epi16(stp2_0, stp2_15); \
+  \
+  stp1_16 = stp2_16; \
+  stp1_17 = stp2_17; \
+  stp1_18 = stp2_18; \
+  stp1_19 = stp2_19; \
+  \
+  MULTIPLICATION_AND_ADD(lo_20_27, hi_20_27, lo_21_26, hi_21_26, stg6_0, \
+                         stg4_0, stg6_0, stg4_0, stp1_20, stp1_27, \
+                         stp1_21, stp1_26) \
+  MULTIPLICATION_AND_ADD(lo_22_25, hi_22_25, lo_23_24, hi_23_24, stg6_0, \
+                         stg4_0, stg6_0, stg4_0, stp1_22, stp1_25, \
+                         stp1_23, stp1_24) \
+  \
+  stp1_28 = stp2_28; \
+  stp1_29 = stp2_29; \
+  stp1_30 = stp2_30; \
+  stp1_31 = stp2_31; \
+}
+
+// Only upper-left 8x8 has non-zero coeff
+void vp9_idct32x32_34_add_sse2(const int16_t *input, uint8_t *dest,
+                               int stride) {
+  const __m128i rounding = _mm_set1_epi32(DCT_CONST_ROUNDING);
+  const __m128i final_rounding = _mm_set1_epi16(1<<5);
+
+  // idct constants for each stage
+  const __m128i stg1_0 = pair_set_epi16(cospi_31_64, -cospi_1_64);
+  const __m128i stg1_1 = pair_set_epi16(cospi_1_64, cospi_31_64);
+  const __m128i stg1_6 = pair_set_epi16(cospi_7_64, -cospi_25_64);
+  const __m128i stg1_7 = pair_set_epi16(cospi_25_64, cospi_7_64);
+  const __m128i stg1_8 = pair_set_epi16(cospi_27_64, -cospi_5_64);
+  const __m128i stg1_9 = pair_set_epi16(cospi_5_64, cospi_27_64);
+  const __m128i stg1_14 = pair_set_epi16(cospi_3_64, -cospi_29_64);
+  const __m128i stg1_15 = pair_set_epi16(cospi_29_64, cospi_3_64);
+
+  const __m128i stg2_0 = pair_set_epi16(cospi_30_64, -cospi_2_64);
+  const __m128i stg2_1 = pair_set_epi16(cospi_2_64, cospi_30_64);
+  const __m128i stg2_6 = pair_set_epi16(cospi_6_64, -cospi_26_64);
+  const __m128i stg2_7 = pair_set_epi16(cospi_26_64, cospi_6_64);
+
+  const __m128i stg3_0 = pair_set_epi16(cospi_28_64, -cospi_4_64);
+  const __m128i stg3_1 = pair_set_epi16(cospi_4_64, cospi_28_64);
+  const __m128i stg3_4 = pair_set_epi16(-cospi_4_64, cospi_28_64);
+  const __m128i stg3_5 = pair_set_epi16(cospi_28_64, cospi_4_64);
+  const __m128i stg3_6 = pair_set_epi16(-cospi_28_64, -cospi_4_64);
+  const __m128i stg3_8 = pair_set_epi16(-cospi_20_64, cospi_12_64);
+  const __m128i stg3_9 = pair_set_epi16(cospi_12_64, cospi_20_64);
+  const __m128i stg3_10 = pair_set_epi16(-cospi_12_64, -cospi_20_64);
+
+  const __m128i stg4_0 = pair_set_epi16(cospi_16_64, cospi_16_64);
+  const __m128i stg4_1 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+  const __m128i stg4_4 = pair_set_epi16(-cospi_8_64, cospi_24_64);
+  const __m128i stg4_5 = pair_set_epi16(cospi_24_64, cospi_8_64);
+  const __m128i stg4_6 = pair_set_epi16(-cospi_24_64, -cospi_8_64);
+
+  const __m128i stg6_0 = pair_set_epi16(-cospi_16_64, cospi_16_64);
+
+  __m128i in[32], col[32];
+  __m128i stp1_0, stp1_1, stp1_2, stp1_3, stp1_4, stp1_5, stp1_6, stp1_7,
+          stp1_8, stp1_9, stp1_10, stp1_11, stp1_12, stp1_13, stp1_14, stp1_15,
+          stp1_16, stp1_17, stp1_18, stp1_19, stp1_20, stp1_21, stp1_22,
+          stp1_23, stp1_24, stp1_25, stp1_26, stp1_27, stp1_28, stp1_29,
+          stp1_30, stp1_31;
+  __m128i stp2_0, stp2_1, stp2_2, stp2_3, stp2_4, stp2_5, stp2_6, stp2_7,
+          stp2_8, stp2_9, stp2_10, stp2_11, stp2_12, stp2_13, stp2_14, stp2_15,
+          stp2_16, stp2_17, stp2_18, stp2_19, stp2_20, stp2_21, stp2_22,
+          stp2_23, stp2_24, stp2_25, stp2_26, stp2_27, stp2_28, stp2_29,
+          stp2_30, stp2_31;
+  __m128i tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
+  int i;
+
+  // Load input data. Only need to load the top left 8x8 block.
+  in[0] = _mm_load_si128((const __m128i *)input);
+  in[1] = _mm_load_si128((const __m128i *)(input + 32));
+  in[2] = _mm_load_si128((const __m128i *)(input + 64));
+  in[3] = _mm_load_si128((const __m128i *)(input + 96));
+  in[4] = _mm_load_si128((const __m128i *)(input + 128));
+  in[5] = _mm_load_si128((const __m128i *)(input + 160));
+  in[6] = _mm_load_si128((const __m128i *)(input + 192));
+  in[7] = _mm_load_si128((const __m128i *)(input + 224));
+
+  for (i = 8; i < 32; ++i) {
+    in[i] = _mm_setzero_si128();
+  }
+
+  array_transpose_8x8(in, in);
+  // TODO(hkuang): Following transposes are unnecessary. But remove them will
+  // lead to performance drop on some devices.
+  array_transpose_8x8(in + 8, in + 8);
+  array_transpose_8x8(in + 16, in + 16);
+  array_transpose_8x8(in + 24, in + 24);
+
+  IDCT32_34
+
+  // 1_D: Store 32 intermediate results for each 8x32 block.
+  col[0] = _mm_add_epi16(stp1_0, stp1_31);
+  col[1] = _mm_add_epi16(stp1_1, stp1_30);
+  col[2] = _mm_add_epi16(stp1_2, stp1_29);
+  col[3] = _mm_add_epi16(stp1_3, stp1_28);
+  col[4] = _mm_add_epi16(stp1_4, stp1_27);
+  col[5] = _mm_add_epi16(stp1_5, stp1_26);
+  col[6] = _mm_add_epi16(stp1_6, stp1_25);
+  col[7] = _mm_add_epi16(stp1_7, stp1_24);
+  col[8] = _mm_add_epi16(stp1_8, stp1_23);
+  col[9] = _mm_add_epi16(stp1_9, stp1_22);
+  col[10] = _mm_add_epi16(stp1_10, stp1_21);
+  col[11] = _mm_add_epi16(stp1_11, stp1_20);
+  col[12] = _mm_add_epi16(stp1_12, stp1_19);
+  col[13] = _mm_add_epi16(stp1_13, stp1_18);
+  col[14] = _mm_add_epi16(stp1_14, stp1_17);
+  col[15] = _mm_add_epi16(stp1_15, stp1_16);
+  col[16] = _mm_sub_epi16(stp1_15, stp1_16);
+  col[17] = _mm_sub_epi16(stp1_14, stp1_17);
+  col[18] = _mm_sub_epi16(stp1_13, stp1_18);
+  col[19] = _mm_sub_epi16(stp1_12, stp1_19);
+  col[20] = _mm_sub_epi16(stp1_11, stp1_20);
+  col[21] = _mm_sub_epi16(stp1_10, stp1_21);
+  col[22] = _mm_sub_epi16(stp1_9, stp1_22);
+  col[23] = _mm_sub_epi16(stp1_8, stp1_23);
+  col[24] = _mm_sub_epi16(stp1_7, stp1_24);
+  col[25] = _mm_sub_epi16(stp1_6, stp1_25);
+  col[26] = _mm_sub_epi16(stp1_5, stp1_26);
+  col[27] = _mm_sub_epi16(stp1_4, stp1_27);
+  col[28] = _mm_sub_epi16(stp1_3, stp1_28);
+  col[29] = _mm_sub_epi16(stp1_2, stp1_29);
+  col[30] = _mm_sub_epi16(stp1_1, stp1_30);
+  col[31] = _mm_sub_epi16(stp1_0, stp1_31);
+  for (i = 0; i < 4; i++) {
+    int j;
+    const __m128i zero = _mm_setzero_si128();
+    // Transpose 32x8 block to 8x32 block
+    array_transpose_8x8(col + i * 8, in);
+    IDCT32_34
+
+    // 2_D: Calculate the results and store them to destination.
+    in[0] = _mm_add_epi16(stp1_0, stp1_31);
+    in[1] = _mm_add_epi16(stp1_1, stp1_30);
+    in[2] = _mm_add_epi16(stp1_2, stp1_29);
+    in[3] = _mm_add_epi16(stp1_3, stp1_28);
+    in[4] = _mm_add_epi16(stp1_4, stp1_27);
+    in[5] = _mm_add_epi16(stp1_5, stp1_26);
+    in[6] = _mm_add_epi16(stp1_6, stp1_25);
+    in[7] = _mm_add_epi16(stp1_7, stp1_24);
+    in[8] = _mm_add_epi16(stp1_8, stp1_23);
+    in[9] = _mm_add_epi16(stp1_9, stp1_22);
+    in[10] = _mm_add_epi16(stp1_10, stp1_21);
+    in[11] = _mm_add_epi16(stp1_11, stp1_20);
+    in[12] = _mm_add_epi16(stp1_12, stp1_19);
+    in[13] = _mm_add_epi16(stp1_13, stp1_18);
+    in[14] = _mm_add_epi16(stp1_14, stp1_17);
+    in[15] = _mm_add_epi16(stp1_15, stp1_16);
+    in[16] = _mm_sub_epi16(stp1_15, stp1_16);
+    in[17] = _mm_sub_epi16(stp1_14, stp1_17);
+    in[18] = _mm_sub_epi16(stp1_13, stp1_18);
+    in[19] = _mm_sub_epi16(stp1_12, stp1_19);
+    in[20] = _mm_sub_epi16(stp1_11, stp1_20);
+    in[21] = _mm_sub_epi16(stp1_10, stp1_21);
+    in[22] = _mm_sub_epi16(stp1_9, stp1_22);
+    in[23] = _mm_sub_epi16(stp1_8, stp1_23);
+    in[24] = _mm_sub_epi16(stp1_7, stp1_24);
+    in[25] = _mm_sub_epi16(stp1_6, stp1_25);
+    in[26] = _mm_sub_epi16(stp1_5, stp1_26);
+    in[27] = _mm_sub_epi16(stp1_4, stp1_27);
+    in[28] = _mm_sub_epi16(stp1_3, stp1_28);
+    in[29] = _mm_sub_epi16(stp1_2, stp1_29);
+    in[30] = _mm_sub_epi16(stp1_1, stp1_30);
+    in[31] = _mm_sub_epi16(stp1_0, stp1_31);
+
+    for (j = 0; j < 32; ++j) {
+      // Final rounding and shift
+      in[j] = _mm_adds_epi16(in[j], final_rounding);
+      in[j] = _mm_srai_epi16(in[j], 6);
+      RECON_AND_STORE(dest + j * stride, in[j]);
+    }
+
+    dest += 8;
+  }
+}
+
+void vp9_idct32x32_1024_add_sse2(const int16_t *input, uint8_t *dest,
+                                 int stride) {
+  const __m128i rounding = _mm_set1_epi32(DCT_CONST_ROUNDING);
+  const __m128i final_rounding = _mm_set1_epi16(1 << 5);
+  const __m128i zero = _mm_setzero_si128();
+
+  // idct constants for each stage
+  const __m128i stg1_0 = pair_set_epi16(cospi_31_64, -cospi_1_64);
+  const __m128i stg1_1 = pair_set_epi16(cospi_1_64, cospi_31_64);
+  const __m128i stg1_2 = pair_set_epi16(cospi_15_64, -cospi_17_64);
+  const __m128i stg1_3 = pair_set_epi16(cospi_17_64, cospi_15_64);
+  const __m128i stg1_4 = pair_set_epi16(cospi_23_64, -cospi_9_64);
+  const __m128i stg1_5 = pair_set_epi16(cospi_9_64, cospi_23_64);
+  const __m128i stg1_6 = pair_set_epi16(cospi_7_64, -cospi_25_64);
+  const __m128i stg1_7 = pair_set_epi16(cospi_25_64, cospi_7_64);
+  const __m128i stg1_8 = pair_set_epi16(cospi_27_64, -cospi_5_64);
+  const __m128i stg1_9 = pair_set_epi16(cospi_5_64, cospi_27_64);
+  const __m128i stg1_10 = pair_set_epi16(cospi_11_64, -cospi_21_64);
+  const __m128i stg1_11 = pair_set_epi16(cospi_21_64, cospi_11_64);
+  const __m128i stg1_12 = pair_set_epi16(cospi_19_64, -cospi_13_64);
+  const __m128i stg1_13 = pair_set_epi16(cospi_13_64, cospi_19_64);
+  const __m128i stg1_14 = pair_set_epi16(cospi_3_64, -cospi_29_64);
+  const __m128i stg1_15 = pair_set_epi16(cospi_29_64, cospi_3_64);
+
+  const __m128i stg2_0 = pair_set_epi16(cospi_30_64, -cospi_2_64);
+  const __m128i stg2_1 = pair_set_epi16(cospi_2_64, cospi_30_64);
+  const __m128i stg2_2 = pair_set_epi16(cospi_14_64, -cospi_18_64);
+  const __m128i stg2_3 = pair_set_epi16(cospi_18_64, cospi_14_64);
+  const __m128i stg2_4 = pair_set_epi16(cospi_22_64, -cospi_10_64);
+  const __m128i stg2_5 = pair_set_epi16(cospi_10_64, cospi_22_64);
+  const __m128i stg2_6 = pair_set_epi16(cospi_6_64, -cospi_26_64);
+  const __m128i stg2_7 = pair_set_epi16(cospi_26_64, cospi_6_64);
+
+  const __m128i stg3_0 = pair_set_epi16(cospi_28_64, -cospi_4_64);
+  const __m128i stg3_1 = pair_set_epi16(cospi_4_64, cospi_28_64);
+  const __m128i stg3_2 = pair_set_epi16(cospi_12_64, -cospi_20_64);
+  const __m128i stg3_3 = pair_set_epi16(cospi_20_64, cospi_12_64);
+  const __m128i stg3_4 = pair_set_epi16(-cospi_4_64, cospi_28_64);
+  const __m128i stg3_5 = pair_set_epi16(cospi_28_64, cospi_4_64);
+  const __m128i stg3_6 = pair_set_epi16(-cospi_28_64, -cospi_4_64);
+  const __m128i stg3_8 = pair_set_epi16(-cospi_20_64, cospi_12_64);
+  const __m128i stg3_9 = pair_set_epi16(cospi_12_64, cospi_20_64);
+  const __m128i stg3_10 = pair_set_epi16(-cospi_12_64, -cospi_20_64);
+
+  const __m128i stg4_0 = pair_set_epi16(cospi_16_64, cospi_16_64);
+  const __m128i stg4_1 = pair_set_epi16(cospi_16_64, -cospi_16_64);
+  const __m128i stg4_2 = pair_set_epi16(cospi_24_64, -cospi_8_64);
+  const __m128i stg4_3 = pair_set_epi16(cospi_8_64, cospi_24_64);
+  const __m128i stg4_4 = pair_set_epi16(-cospi_8_64, cospi_24_64);
+  const __m128i stg4_5 = pair_set_epi16(cospi_24_64, cospi_8_64);
+  const __m128i stg4_6 = pair_set_epi16(-cospi_24_64, -cospi_8_64);
+
+  const __m128i stg6_0 = pair_set_epi16(-cospi_16_64, cospi_16_64);
+
+  __m128i in[32], col[128], zero_idx[16];
+  __m128i stp1_0, stp1_1, stp1_2, stp1_3, stp1_4, stp1_5, stp1_6, stp1_7,
+          stp1_8, stp1_9, stp1_10, stp1_11, stp1_12, stp1_13, stp1_14, stp1_15,
+          stp1_16, stp1_17, stp1_18, stp1_19, stp1_20, stp1_21, stp1_22,
+          stp1_23, stp1_24, stp1_25, stp1_26, stp1_27, stp1_28, stp1_29,
+          stp1_30, stp1_31;
+  __m128i stp2_0, stp2_1, stp2_2, stp2_3, stp2_4, stp2_5, stp2_6, stp2_7,
+          stp2_8, stp2_9, stp2_10, stp2_11, stp2_12, stp2_13, stp2_14, stp2_15,
+          stp2_16, stp2_17, stp2_18, stp2_19, stp2_20, stp2_21, stp2_22,
+          stp2_23, stp2_24, stp2_25, stp2_26, stp2_27, stp2_28, stp2_29,
+          stp2_30, stp2_31;
+  __m128i tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
+  int i, j, i32;
+
+  for (i = 0; i < 4; i++) {
+    i32 = (i << 5);
+    // First 1-D idct
+    // Load input data.
+    LOAD_DQCOEFF(in[0], input);
+    LOAD_DQCOEFF(in[8], input);
+    LOAD_DQCOEFF(in[16], input);
+    LOAD_DQCOEFF(in[24], input);
+    LOAD_DQCOEFF(in[1], input);
+    LOAD_DQCOEFF(in[9], input);
+    LOAD_DQCOEFF(in[17], input);
+    LOAD_DQCOEFF(in[25], input);
+    LOAD_DQCOEFF(in[2], input);
+    LOAD_DQCOEFF(in[10], input);
+    LOAD_DQCOEFF(in[18], input);
+    LOAD_DQCOEFF(in[26], input);
+    LOAD_DQCOEFF(in[3], input);
+    LOAD_DQCOEFF(in[11], input);
+    LOAD_DQCOEFF(in[19], input);
+    LOAD_DQCOEFF(in[27], input);
+
+    LOAD_DQCOEFF(in[4], input);
+    LOAD_DQCOEFF(in[12], input);
+    LOAD_DQCOEFF(in[20], input);
+    LOAD_DQCOEFF(in[28], input);
+    LOAD_DQCOEFF(in[5], input);
+    LOAD_DQCOEFF(in[13], input);
+    LOAD_DQCOEFF(in[21], input);
+    LOAD_DQCOEFF(in[29], input);
+    LOAD_DQCOEFF(in[6], input);
+    LOAD_DQCOEFF(in[14], input);
+    LOAD_DQCOEFF(in[22], input);
+    LOAD_DQCOEFF(in[30], input);
+    LOAD_DQCOEFF(in[7], input);
+    LOAD_DQCOEFF(in[15], input);
+    LOAD_DQCOEFF(in[23], input);
+    LOAD_DQCOEFF(in[31], input);
+
+    // checking if all entries are zero
+    zero_idx[0] = _mm_or_si128(in[0], in[1]);
+    zero_idx[1] = _mm_or_si128(in[2], in[3]);
+    zero_idx[2] = _mm_or_si128(in[4], in[5]);
+    zero_idx[3] = _mm_or_si128(in[6], in[7]);
+    zero_idx[4] = _mm_or_si128(in[8], in[9]);
+    zero_idx[5] = _mm_or_si128(in[10], in[11]);
+    zero_idx[6] = _mm_or_si128(in[12], in[13]);
+    zero_idx[7] = _mm_or_si128(in[14], in[15]);
+    zero_idx[8] = _mm_or_si128(in[16], in[17]);
+    zero_idx[9] = _mm_or_si128(in[18], in[19]);
+    zero_idx[10] = _mm_or_si128(in[20], in[21]);
+    zero_idx[11] = _mm_or_si128(in[22], in[23]);
+    zero_idx[12] = _mm_or_si128(in[24], in[25]);
+    zero_idx[13] = _mm_or_si128(in[26], in[27]);
+    zero_idx[14] = _mm_or_si128(in[28], in[29]);
+    zero_idx[15] = _mm_or_si128(in[30], in[31]);
+
+    zero_idx[0] = _mm_or_si128(zero_idx[0], zero_idx[1]);
+    zero_idx[1] = _mm_or_si128(zero_idx[2], zero_idx[3]);
+    zero_idx[2] = _mm_or_si128(zero_idx[4], zero_idx[5]);
+    zero_idx[3] = _mm_or_si128(zero_idx[6], zero_idx[7]);
+    zero_idx[4] = _mm_or_si128(zero_idx[8], zero_idx[9]);
+    zero_idx[5] = _mm_or_si128(zero_idx[10], zero_idx[11]);
+    zero_idx[6] = _mm_or_si128(zero_idx[12], zero_idx[13]);
+    zero_idx[7] = _mm_or_si128(zero_idx[14], zero_idx[15]);
+
+    zero_idx[8] = _mm_or_si128(zero_idx[0], zero_idx[1]);
+    zero_idx[9] = _mm_or_si128(zero_idx[2], zero_idx[3]);
+    zero_idx[10] = _mm_or_si128(zero_idx[4], zero_idx[5]);
+    zero_idx[11] = _mm_or_si128(zero_idx[6], zero_idx[7]);
+    zero_idx[12] = _mm_or_si128(zero_idx[8], zero_idx[9]);
+    zero_idx[13] = _mm_or_si128(zero_idx[10], zero_idx[11]);
+    zero_idx[14] = _mm_or_si128(zero_idx[12], zero_idx[13]);
+
+    if (_mm_movemask_epi8(_mm_cmpeq_epi32(zero_idx[14], zero)) == 0xFFFF) {
+      col[i32 + 0] = _mm_setzero_si128();
+      col[i32 + 1] = _mm_setzero_si128();
+      col[i32 + 2] = _mm_setzero_si128();
+      col[i32 + 3] = _mm_setzero_si128();
+      col[i32 + 4] = _mm_setzero_si128();
+      col[i32 + 5] = _mm_setzero_si128();
+      col[i32 + 6] = _mm_setzero_si128();
+      col[i32 + 7] = _mm_setzero_si128();
+      col[i32 + 8] = _mm_setzero_si128();
+      col[i32 + 9] = _mm_setzero_si128();
+      col[i32 + 10] = _mm_setzero_si128();
+      col[i32 + 11] = _mm_setzero_si128();
+      col[i32 + 12] = _mm_setzero_si128();
+      col[i32 + 13] = _mm_setzero_si128();
+      col[i32 + 14] = _mm_setzero_si128();
+      col[i32 + 15] = _mm_setzero_si128();
+      col[i32 + 16] = _mm_setzero_si128();
+      col[i32 + 17] = _mm_setzero_si128();
+      col[i32 + 18] = _mm_setzero_si128();
+      col[i32 + 19] = _mm_setzero_si128();
+      col[i32 + 20] = _mm_setzero_si128();
+      col[i32 + 21] = _mm_setzero_si128();
+      col[i32 + 22] = _mm_setzero_si128();
+      col[i32 + 23] = _mm_setzero_si128();
+      col[i32 + 24] = _mm_setzero_si128();
+      col[i32 + 25] = _mm_setzero_si128();
+      col[i32 + 26] = _mm_setzero_si128();
+      col[i32 + 27] = _mm_setzero_si128();
+      col[i32 + 28] = _mm_setzero_si128();
+      col[i32 + 29] = _mm_setzero_si128();
+      col[i32 + 30] = _mm_setzero_si128();
+      col[i32 + 31] = _mm_setzero_si128();
+      continue;
+    }
+
+    // Transpose 32x8 block to 8x32 block
+    array_transpose_8x8(in, in);
+    array_transpose_8x8(in + 8, in + 8);
+    array_transpose_8x8(in + 16, in + 16);
+    array_transpose_8x8(in + 24, in + 24);
+
+    IDCT32
+
+    // 1_D: Store 32 intermediate results for each 8x32 block.
+    col[i32 + 0] = _mm_add_epi16(stp1_0, stp1_31);
+    col[i32 + 1] = _mm_add_epi16(stp1_1, stp1_30);
+    col[i32 + 2] = _mm_add_epi16(stp1_2, stp1_29);
+    col[i32 + 3] = _mm_add_epi16(stp1_3, stp1_28);
+    col[i32 + 4] = _mm_add_epi16(stp1_4, stp1_27);
+    col[i32 + 5] = _mm_add_epi16(stp1_5, stp1_26);
+    col[i32 + 6] = _mm_add_epi16(stp1_6, stp1_25);
+    col[i32 + 7] = _mm_add_epi16(stp1_7, stp1_24);
+    col[i32 + 8] = _mm_add_epi16(stp1_8, stp1_23);
+    col[i32 + 9] = _mm_add_epi16(stp1_9, stp1_22);
+    col[i32 + 10] = _mm_add_epi16(stp1_10, stp1_21);
+    col[i32 + 11] = _mm_add_epi16(stp1_11, stp1_20);
+    col[i32 + 12] = _mm_add_epi16(stp1_12, stp1_19);
+    col[i32 + 13] = _mm_add_epi16(stp1_13, stp1_18);
+    col[i32 + 14] = _mm_add_epi16(stp1_14, stp1_17);
+    col[i32 + 15] = _mm_add_epi16(stp1_15, stp1_16);
+    col[i32 + 16] = _mm_sub_epi16(stp1_15, stp1_16);
+    col[i32 + 17] = _mm_sub_epi16(stp1_14, stp1_17);
+    col[i32 + 18] = _mm_sub_epi16(stp1_13, stp1_18);
+    col[i32 + 19] = _mm_sub_epi16(stp1_12, stp1_19);
+    col[i32 + 20] = _mm_sub_epi16(stp1_11, stp1_20);
+    col[i32 + 21] = _mm_sub_epi16(stp1_10, stp1_21);
+    col[i32 + 22] = _mm_sub_epi16(stp1_9, stp1_22);
+    col[i32 + 23] = _mm_sub_epi16(stp1_8, stp1_23);
+    col[i32 + 24] = _mm_sub_epi16(stp1_7, stp1_24);
+    col[i32 + 25] = _mm_sub_epi16(stp1_6, stp1_25);
+    col[i32 + 26] = _mm_sub_epi16(stp1_5, stp1_26);
+    col[i32 + 27] = _mm_sub_epi16(stp1_4, stp1_27);
+    col[i32 + 28] = _mm_sub_epi16(stp1_3, stp1_28);
+    col[i32 + 29] = _mm_sub_epi16(stp1_2, stp1_29);
+    col[i32 + 30] = _mm_sub_epi16(stp1_1, stp1_30);
+    col[i32 + 31] = _mm_sub_epi16(stp1_0, stp1_31);
+  }
+  for (i = 0; i < 4; i++) {
+    // Second 1-D idct
+    j = i << 3;
+
+    // Transpose 32x8 block to 8x32 block
+    array_transpose_8x8(col + j, in);
+    array_transpose_8x8(col + j + 32, in + 8);
+    array_transpose_8x8(col + j + 64, in + 16);
+    array_transpose_8x8(col + j + 96, in + 24);
+
+    IDCT32
+
+    // 2_D: Calculate the results and store them to destination.
+    in[0] = _mm_add_epi16(stp1_0, stp1_31);
+    in[1] = _mm_add_epi16(stp1_1, stp1_30);
+    in[2] = _mm_add_epi16(stp1_2, stp1_29);
+    in[3] = _mm_add_epi16(stp1_3, stp1_28);
+    in[4] = _mm_add_epi16(stp1_4, stp1_27);
+    in[5] = _mm_add_epi16(stp1_5, stp1_26);
+    in[6] = _mm_add_epi16(stp1_6, stp1_25);
+    in[7] = _mm_add_epi16(stp1_7, stp1_24);
+    in[8] = _mm_add_epi16(stp1_8, stp1_23);
+    in[9] = _mm_add_epi16(stp1_9, stp1_22);
+    in[10] = _mm_add_epi16(stp1_10, stp1_21);
+    in[11] = _mm_add_epi16(stp1_11, stp1_20);
+    in[12] = _mm_add_epi16(stp1_12, stp1_19);
+    in[13] = _mm_add_epi16(stp1_13, stp1_18);
+    in[14] = _mm_add_epi16(stp1_14, stp1_17);
+    in[15] = _mm_add_epi16(stp1_15, stp1_16);
+    in[16] = _mm_sub_epi16(stp1_15, stp1_16);
+    in[17] = _mm_sub_epi16(stp1_14, stp1_17);
+    in[18] = _mm_sub_epi16(stp1_13, stp1_18);
+    in[19] = _mm_sub_epi16(stp1_12, stp1_19);
+    in[20] = _mm_sub_epi16(stp1_11, stp1_20);
+    in[21] = _mm_sub_epi16(stp1_10, stp1_21);
+    in[22] = _mm_sub_epi16(stp1_9, stp1_22);
+    in[23] = _mm_sub_epi16(stp1_8, stp1_23);
+    in[24] = _mm_sub_epi16(stp1_7, stp1_24);
+    in[25] = _mm_sub_epi16(stp1_6, stp1_25);
+    in[26] = _mm_sub_epi16(stp1_5, stp1_26);
+    in[27] = _mm_sub_epi16(stp1_4, stp1_27);
+    in[28] = _mm_sub_epi16(stp1_3, stp1_28);
+    in[29] = _mm_sub_epi16(stp1_2, stp1_29);
+    in[30] = _mm_sub_epi16(stp1_1, stp1_30);
+    in[31] = _mm_sub_epi16(stp1_0, stp1_31);
+
+    for (j = 0; j < 32; ++j) {
+      // Final rounding and shift
+      in[j] = _mm_adds_epi16(in[j], final_rounding);
+      in[j] = _mm_srai_epi16(in[j], 6);
+      RECON_AND_STORE(dest + j * stride, in[j]);
+    }
+
+    dest += 8;
+  }
+}
+
+void vp9_idct32x32_1_add_sse2(const int16_t *input, uint8_t *dest, int stride) {
+  __m128i dc_value;
+  const __m128i zero = _mm_setzero_si128();
+  int a, i;
+
+  a = dct_const_round_shift(input[0] * cospi_16_64);
+  a = dct_const_round_shift(a * cospi_16_64);
+  a = ROUND_POWER_OF_TWO(a, 6);
+
+  dc_value = _mm_set1_epi16(a);
+
+  for (i = 0; i < 4; ++i) {
+    int j;
+    for (j = 0; j < 32; ++j) {
+      RECON_AND_STORE(dest + j * stride, dc_value);
+    }
+    dest += 8;
+  }
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+static INLINE __m128i clamp_high_sse2(__m128i value, int bd) {
+  __m128i ubounded, retval;
+  const __m128i zero = _mm_set1_epi16(0);
+  const __m128i one = _mm_set1_epi16(1);
+  const __m128i max = _mm_subs_epi16(_mm_slli_epi16(one, bd), one);
+  ubounded = _mm_cmpgt_epi16(value, max);
+  retval = _mm_andnot_si128(ubounded, value);
+  ubounded = _mm_and_si128(ubounded, max);
+  retval = _mm_or_si128(retval, ubounded);
+  retval = _mm_and_si128(retval, _mm_cmpgt_epi16(retval, zero));
+  return retval;
+}
+
+void vp9_highbd_idct4x4_16_add_sse2(const tran_low_t *input, uint8_t *dest8,
+                                    int stride, int bd) {
+  tran_low_t out[4 * 4];
+  tran_low_t *outptr = out;
+  int i, j;
+  __m128i inptr[4];
+  __m128i sign_bits[2];
+  __m128i temp_mm, min_input, max_input;
+  int test;
+  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
+  int optimised_cols = 0;
+  const __m128i zero = _mm_set1_epi16(0);
+  const __m128i eight = _mm_set1_epi16(8);
+  const __m128i max = _mm_set1_epi16(12043);
+  const __m128i min = _mm_set1_epi16(-12043);
+  // Load input into __m128i
+  inptr[0] = _mm_loadu_si128((const __m128i *)input);
+  inptr[1] = _mm_loadu_si128((const __m128i *)(input + 4));
+  inptr[2] = _mm_loadu_si128((const __m128i *)(input + 8));
+  inptr[3] = _mm_loadu_si128((const __m128i *)(input + 12));
+
+  // Pack to 16 bits
+  inptr[0] = _mm_packs_epi32(inptr[0], inptr[1]);
+  inptr[1] = _mm_packs_epi32(inptr[2], inptr[3]);
+
+  max_input = _mm_max_epi16(inptr[0], inptr[1]);
+  min_input = _mm_min_epi16(inptr[0], inptr[1]);
+  max_input = _mm_cmpgt_epi16(max_input, max);
+  min_input = _mm_cmplt_epi16(min_input, min);
+  temp_mm = _mm_or_si128(max_input, min_input);
+  test = _mm_movemask_epi8(temp_mm);
+
+  if (!test) {
+    // Do the row transform
+    idct4_sse2(inptr);
+
+    // Check the min & max values
+    max_input = _mm_max_epi16(inptr[0], inptr[1]);
+    min_input = _mm_min_epi16(inptr[0], inptr[1]);
+    max_input = _mm_cmpgt_epi16(max_input, max);
+    min_input = _mm_cmplt_epi16(min_input, min);
+    temp_mm = _mm_or_si128(max_input, min_input);
+    test = _mm_movemask_epi8(temp_mm);
+
+    if (test) {
+      transpose_4x4(inptr);
+      sign_bits[0] = _mm_cmplt_epi16(inptr[0], zero);
+      sign_bits[1] = _mm_cmplt_epi16(inptr[1], zero);
+      inptr[3] = _mm_unpackhi_epi16(inptr[1], sign_bits[1]);
+      inptr[2] = _mm_unpacklo_epi16(inptr[1], sign_bits[1]);
+      inptr[1] = _mm_unpackhi_epi16(inptr[0], sign_bits[0]);
+      inptr[0] = _mm_unpacklo_epi16(inptr[0], sign_bits[0]);
+      _mm_storeu_si128((__m128i *)outptr, inptr[0]);
+      _mm_storeu_si128((__m128i *)(outptr + 4), inptr[1]);
+      _mm_storeu_si128((__m128i *)(outptr + 8), inptr[2]);
+      _mm_storeu_si128((__m128i *)(outptr + 12), inptr[3]);
+    } else {
+      // Set to use the optimised transform for the column
+      optimised_cols = 1;
+    }
+  } else {
+    // Run the un-optimised row transform
+    for (i = 0; i < 4; ++i) {
+      vp9_highbd_idct4_c(input, outptr, bd);
+      input += 4;
+      outptr += 4;
+    }
+  }
+
+  if (optimised_cols) {
+    idct4_sse2(inptr);
+
+    // Final round and shift
+    inptr[0] = _mm_add_epi16(inptr[0], eight);
+    inptr[1] = _mm_add_epi16(inptr[1], eight);
+
+    inptr[0] = _mm_srai_epi16(inptr[0], 4);
+    inptr[1] = _mm_srai_epi16(inptr[1], 4);
+
+    // Reconstruction and Store
+    {
+      __m128i d0 = _mm_loadl_epi64((const __m128i *)dest);
+      __m128i d2 = _mm_loadl_epi64((const __m128i *)(dest + stride * 2));
+      d0 = _mm_unpacklo_epi64(
+          d0, _mm_loadl_epi64((const __m128i *)(dest + stride)));
+      d2 = _mm_unpacklo_epi64(
+          d2, _mm_loadl_epi64((const __m128i *)(dest + stride * 3)));
+      d0 = clamp_high_sse2(_mm_adds_epi16(d0, inptr[0]), bd);
+      d2 = clamp_high_sse2(_mm_adds_epi16(d2, inptr[1]), bd);
+      // store input0
+      _mm_storel_epi64((__m128i *)dest, d0);
+      // store input1
+      d0 = _mm_srli_si128(d0, 8);
+      _mm_storel_epi64((__m128i *)(dest + stride), d0);
+      // store input2
+      _mm_storel_epi64((__m128i *)(dest + stride * 2), d2);
+      // store input3
+      d2 = _mm_srli_si128(d2, 8);
+      _mm_storel_epi64((__m128i *)(dest + stride * 3), d2);
+    }
+  } else {
+    // Run the un-optimised column transform
+    tran_low_t temp_in[4], temp_out[4];
+    // Columns
+    for (i = 0; i < 4; ++i) {
+      for (j = 0; j < 4; ++j)
+        temp_in[j] = out[j * 4 + i];
+      vp9_highbd_idct4_c(temp_in, temp_out, bd);
+      for (j = 0; j < 4; ++j) {
+        dest[j * stride + i] = highbd_clip_pixel_add(
+            dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 4), bd);
+      }
+    }
+  }
+}
+
+void vp9_highbd_idct8x8_64_add_sse2(const tran_low_t *input, uint8_t *dest8,
+                                    int stride, int bd) {
+  tran_low_t out[8 * 8];
+  tran_low_t *outptr = out;
+  int i, j, test;
+  __m128i inptr[8];
+  __m128i min_input, max_input, temp1, temp2, sign_bits;
+  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
+  const __m128i zero = _mm_set1_epi16(0);
+  const __m128i sixteen = _mm_set1_epi16(16);
+  const __m128i max = _mm_set1_epi16(6201);
+  const __m128i min = _mm_set1_epi16(-6201);
+  int optimised_cols = 0;
+
+  // Load input into __m128i & pack to 16 bits
+  for (i = 0; i < 8; i++) {
+    temp1 = _mm_loadu_si128((const __m128i *)(input + 8 * i));
+    temp2 = _mm_loadu_si128((const __m128i *)(input + 8 * i + 4));
+    inptr[i] = _mm_packs_epi32(temp1, temp2);
+  }
+
+  // Find the min & max for the row transform
+  max_input = _mm_max_epi16(inptr[0], inptr[1]);
+  min_input = _mm_min_epi16(inptr[0], inptr[1]);
+  for (i = 2; i < 8; i++) {
+    max_input = _mm_max_epi16(max_input, inptr[i]);
+    min_input = _mm_min_epi16(min_input, inptr[i]);
+  }
+  max_input = _mm_cmpgt_epi16(max_input, max);
+  min_input = _mm_cmplt_epi16(min_input, min);
+  temp1 = _mm_or_si128(max_input, min_input);
+  test = _mm_movemask_epi8(temp1);
+
+  if (!test) {
+    // Do the row transform
+    idct8_sse2(inptr);
+
+    // Find the min & max for the column transform
+    max_input = _mm_max_epi16(inptr[0], inptr[1]);
+    min_input = _mm_min_epi16(inptr[0], inptr[1]);
+    for (i = 2; i < 8; i++) {
+      max_input = _mm_max_epi16(max_input, inptr[i]);
+      min_input = _mm_min_epi16(min_input, inptr[i]);
+    }
+    max_input = _mm_cmpgt_epi16(max_input, max);
+    min_input = _mm_cmplt_epi16(min_input, min);
+    temp1 = _mm_or_si128(max_input, min_input);
+    test = _mm_movemask_epi8(temp1);
+
+    if (test) {
+      array_transpose_8x8(inptr, inptr);
+      for (i = 0; i < 8; i++) {
+        sign_bits = _mm_cmplt_epi16(inptr[i], zero);
+        temp1 = _mm_unpackhi_epi16(inptr[i], sign_bits);
+        temp2 = _mm_unpacklo_epi16(inptr[i], sign_bits);
+        _mm_storeu_si128((__m128i *)(outptr + 4 * (2 * i + 1)), temp1);
+        _mm_storeu_si128((__m128i *)(outptr + 4 * (2 * i)), temp2);
+      }
+    } else {
+      // Set to use the optimised transform for the column
+      optimised_cols = 1;
+    }
+  } else {
+    // Run the un-optimised row transform
+    for (i = 0; i < 8; ++i) {
+      vp9_highbd_idct8_c(input, outptr, bd);
+      input += 8;
+      outptr += 8;
+    }
+  }
+
+  if (optimised_cols) {
+    idct8_sse2(inptr);
+
+    // Final round & shift and Reconstruction and Store
+    {
+      __m128i d[8];
+      for (i = 0; i < 8; i++) {
+        inptr[i] = _mm_add_epi16(inptr[i], sixteen);
+        d[i] = _mm_loadu_si128((const __m128i *)(dest + stride*i));
+        inptr[i] = _mm_srai_epi16(inptr[i], 5);
+        d[i] = clamp_high_sse2(_mm_adds_epi16(d[i], inptr[i]), bd);
+        // Store
+        _mm_storeu_si128((__m128i *)(dest + stride*i), d[i]);
+      }
+    }
+  } else {
+    // Run the un-optimised column transform
+    tran_low_t temp_in[8], temp_out[8];
+    for (i = 0; i < 8; ++i) {
+      for (j = 0; j < 8; ++j)
+        temp_in[j] = out[j * 8 + i];
+      vp9_highbd_idct8_c(temp_in, temp_out, bd);
+      for (j = 0; j < 8; ++j) {
+        dest[j * stride + i] = highbd_clip_pixel_add(
+            dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 5), bd);
+      }
+    }
+  }
+}
+
+void vp9_highbd_idct8x8_10_add_sse2(const tran_low_t *input, uint8_t *dest8,
+                                    int stride, int bd) {
+  tran_low_t out[8 * 8] = { 0 };
+  tran_low_t *outptr = out;
+  int i, j, test;
+  __m128i inptr[8];
+  __m128i min_input, max_input, temp1, temp2, sign_bits;
+  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
+  const __m128i zero = _mm_set1_epi16(0);
+  const __m128i sixteen = _mm_set1_epi16(16);
+  const __m128i max = _mm_set1_epi16(6201);
+  const __m128i min = _mm_set1_epi16(-6201);
+  int optimised_cols = 0;
+
+  // Load input into __m128i & pack to 16 bits
+  for (i = 0; i < 8; i++) {
+    temp1 = _mm_loadu_si128((const __m128i *)(input + 8 * i));
+    temp2 = _mm_loadu_si128((const __m128i *)(input + 8 * i + 4));
+    inptr[i] = _mm_packs_epi32(temp1, temp2);
+  }
+
+  // Find the min & max for the row transform
+  // only first 4 row has non-zero coefs
+  max_input = _mm_max_epi16(inptr[0], inptr[1]);
+  min_input = _mm_min_epi16(inptr[0], inptr[1]);
+  for (i = 2; i < 4; i++) {
+    max_input = _mm_max_epi16(max_input, inptr[i]);
+    min_input = _mm_min_epi16(min_input, inptr[i]);
+  }
+  max_input = _mm_cmpgt_epi16(max_input, max);
+  min_input = _mm_cmplt_epi16(min_input, min);
+  temp1 = _mm_or_si128(max_input, min_input);
+  test = _mm_movemask_epi8(temp1);
+
+  if (!test) {
+    // Do the row transform
+    idct8_sse2(inptr);
+
+    // Find the min & max for the column transform
+    // N.B. Only first 4 cols contain non-zero coeffs
+    max_input = _mm_max_epi16(inptr[0], inptr[1]);
+    min_input = _mm_min_epi16(inptr[0], inptr[1]);
+    for (i = 2; i < 8; i++) {
+      max_input = _mm_max_epi16(max_input, inptr[i]);
+      min_input = _mm_min_epi16(min_input, inptr[i]);
+    }
+    max_input = _mm_cmpgt_epi16(max_input, max);
+    min_input = _mm_cmplt_epi16(min_input, min);
+    temp1 = _mm_or_si128(max_input, min_input);
+    test = _mm_movemask_epi8(temp1);
+
+    if (test) {
+      // Use fact only first 4 rows contain non-zero coeffs
+      array_transpose_4X8(inptr, inptr);
+      for (i = 0; i < 4; i++) {
+        sign_bits = _mm_cmplt_epi16(inptr[i], zero);
+        temp1 = _mm_unpackhi_epi16(inptr[i], sign_bits);
+        temp2 = _mm_unpacklo_epi16(inptr[i], sign_bits);
+        _mm_storeu_si128((__m128i *)(outptr + 4 * (2 * i + 1)), temp1);
+        _mm_storeu_si128((__m128i *)(outptr + 4 * (2 * i)), temp2);
+      }
+    } else {
+      // Set to use the optimised transform for the column
+      optimised_cols = 1;
+    }
+  } else {
+    // Run the un-optimised row transform
+    for (i = 0; i < 4; ++i) {
+      vp9_highbd_idct8_c(input, outptr, bd);
+      input += 8;
+      outptr += 8;
+    }
+  }
+
+  if (optimised_cols) {
+    idct8_sse2(inptr);
+
+    // Final round & shift and Reconstruction and Store
+    {
+      __m128i d[8];
+      for (i = 0; i < 8; i++) {
+        inptr[i] = _mm_add_epi16(inptr[i], sixteen);
+        d[i] = _mm_loadu_si128((const __m128i *)(dest + stride*i));
+        inptr[i] = _mm_srai_epi16(inptr[i], 5);
+        d[i] = clamp_high_sse2(_mm_adds_epi16(d[i], inptr[i]), bd);
+        // Store
+        _mm_storeu_si128((__m128i *)(dest + stride*i), d[i]);
+      }
+    }
+  } else {
+    // Run the un-optimised column transform
+    tran_low_t temp_in[8], temp_out[8];
+    for (i = 0; i < 8; ++i) {
+      for (j = 0; j < 8; ++j)
+        temp_in[j] = out[j * 8 + i];
+      vp9_highbd_idct8_c(temp_in, temp_out, bd);
+      for (j = 0; j < 8; ++j) {
+        dest[j * stride + i] = highbd_clip_pixel_add(
+            dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 5), bd);
+      }
+    }
+  }
+}
+
+void vp9_highbd_idct16x16_256_add_sse2(const tran_low_t *input, uint8_t *dest8,
+                                       int stride, int bd) {
+  tran_low_t out[16 * 16];
+  tran_low_t *outptr = out;
+  int i, j, test;
+  __m128i inptr[32];
+  __m128i min_input, max_input, temp1, temp2, sign_bits;
+  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
+  const __m128i zero = _mm_set1_epi16(0);
+  const __m128i rounding = _mm_set1_epi16(32);
+  const __m128i max = _mm_set1_epi16(3155);
+  const __m128i min = _mm_set1_epi16(-3155);
+  int optimised_cols = 0;
+
+  // Load input into __m128i & pack to 16 bits
+  for (i = 0; i < 16; i++) {
+    temp1 = _mm_loadu_si128((const __m128i *)(input + 16 * i));
+    temp2 = _mm_loadu_si128((const __m128i *)(input + 16 * i + 4));
+    inptr[i] = _mm_packs_epi32(temp1, temp2);
+    temp1 = _mm_loadu_si128((const __m128i *)(input + 16 * i + 8));
+    temp2 = _mm_loadu_si128((const __m128i *)(input + 16 * i + 12));
+    inptr[i + 16] = _mm_packs_epi32(temp1, temp2);
+  }
+
+  // Find the min & max for the row transform
+  max_input = _mm_max_epi16(inptr[0], inptr[1]);
+  min_input = _mm_min_epi16(inptr[0], inptr[1]);
+  for (i = 2; i < 32; i++) {
+    max_input = _mm_max_epi16(max_input, inptr[i]);
+    min_input = _mm_min_epi16(min_input, inptr[i]);
+  }
+  max_input = _mm_cmpgt_epi16(max_input, max);
+  min_input = _mm_cmplt_epi16(min_input, min);
+  temp1 = _mm_or_si128(max_input, min_input);
+  test = _mm_movemask_epi8(temp1);
+
+  if (!test) {
+    // Do the row transform
+    idct16_sse2(inptr, inptr + 16);
+
+    // Find the min & max for the column transform
+    max_input = _mm_max_epi16(inptr[0], inptr[1]);
+    min_input = _mm_min_epi16(inptr[0], inptr[1]);
+    for (i = 2; i < 32; i++) {
+      max_input = _mm_max_epi16(max_input, inptr[i]);
+      min_input = _mm_min_epi16(min_input, inptr[i]);
+    }
+    max_input = _mm_cmpgt_epi16(max_input, max);
+    min_input = _mm_cmplt_epi16(min_input, min);
+    temp1 = _mm_or_si128(max_input, min_input);
+    test = _mm_movemask_epi8(temp1);
+
+    if (test) {
+      array_transpose_16x16(inptr, inptr + 16);
+      for (i = 0; i < 16; i++) {
+        sign_bits = _mm_cmplt_epi16(inptr[i], zero);
+        temp1 = _mm_unpacklo_epi16(inptr[i], sign_bits);
+        temp2 = _mm_unpackhi_epi16(inptr[i], sign_bits);
+        _mm_storeu_si128((__m128i *)(outptr + 4 * (i * 4)), temp1);
+        _mm_storeu_si128((__m128i *)(outptr + 4 * (i * 4 + 1)), temp2);
+        sign_bits = _mm_cmplt_epi16(inptr[i + 16], zero);
+        temp1 = _mm_unpacklo_epi16(inptr[i + 16], sign_bits);
+        temp2 = _mm_unpackhi_epi16(inptr[i + 16], sign_bits);
+        _mm_storeu_si128((__m128i *)(outptr + 4 * (i * 4 + 2)), temp1);
+        _mm_storeu_si128((__m128i *)(outptr + 4 * (i * 4 + 3)), temp2);
+      }
+    } else {
+      // Set to use the optimised transform for the column
+      optimised_cols = 1;
+    }
+  } else {
+    // Run the un-optimised row transform
+    for (i = 0; i < 16; ++i) {
+      vp9_highbd_idct16_c(input, outptr, bd);
+      input += 16;
+      outptr += 16;
+    }
+  }
+
+  if (optimised_cols) {
+    idct16_sse2(inptr, inptr + 16);
+
+    // Final round & shift and Reconstruction and Store
+    {
+      __m128i d[2];
+      for (i = 0; i < 16; i++) {
+        inptr[i   ] = _mm_add_epi16(inptr[i   ], rounding);
+        inptr[i+16] = _mm_add_epi16(inptr[i+16], rounding);
+        d[0] = _mm_loadu_si128((const __m128i *)(dest + stride*i));
+        d[1] = _mm_loadu_si128((const __m128i *)(dest + stride*i + 8));
+        inptr[i   ] = _mm_srai_epi16(inptr[i   ], 6);
+        inptr[i+16] = _mm_srai_epi16(inptr[i+16], 6);
+        d[0] = clamp_high_sse2(_mm_add_epi16(d[0], inptr[i   ]), bd);
+        d[1] = clamp_high_sse2(_mm_add_epi16(d[1], inptr[i+16]), bd);
+        // Store
+        _mm_storeu_si128((__m128i *)(dest + stride*i), d[0]);
+        _mm_storeu_si128((__m128i *)(dest + stride*i + 8), d[1]);
+      }
+    }
+  } else {
+    // Run the un-optimised column transform
+    tran_low_t temp_in[16], temp_out[16];
+    for (i = 0; i < 16; ++i) {
+      for (j = 0; j < 16; ++j)
+        temp_in[j] = out[j * 16 + i];
+      vp9_highbd_idct16_c(temp_in, temp_out, bd);
+      for (j = 0; j < 16; ++j) {
+        dest[j * stride + i] = highbd_clip_pixel_add(
+            dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 6), bd);
+      }
+    }
+  }
+}
+
+void vp9_highbd_idct16x16_10_add_sse2(const tran_low_t *input, uint8_t *dest8,
+                                      int stride, int bd) {
+  tran_low_t out[16 * 16] = { 0 };
+  tran_low_t *outptr = out;
+  int i, j, test;
+  __m128i inptr[32];
+  __m128i min_input, max_input, temp1, temp2, sign_bits;
+  uint16_t *dest = CONVERT_TO_SHORTPTR(dest8);
+  const __m128i zero = _mm_set1_epi16(0);
+  const __m128i rounding = _mm_set1_epi16(32);
+  const __m128i max = _mm_set1_epi16(3155);
+  const __m128i min = _mm_set1_epi16(-3155);
+  int optimised_cols = 0;
+
+  // Load input into __m128i & pack to 16 bits
+  for (i = 0; i < 16; i++) {
+    temp1 = _mm_loadu_si128((const __m128i *)(input + 16 * i));
+    temp2 = _mm_loadu_si128((const __m128i *)(input + 16 * i + 4));
+    inptr[i] = _mm_packs_epi32(temp1, temp2);
+    temp1 = _mm_loadu_si128((const __m128i *)(input + 16 * i + 8));
+    temp2 = _mm_loadu_si128((const __m128i *)(input + 16 * i + 12));
+    inptr[i + 16] = _mm_packs_epi32(temp1, temp2);
+  }
+
+  // Find the min & max for the row transform
+  // Since all non-zero dct coefficients are in upper-left 4x4 area,
+  // we only need to consider first 4 rows here.
+  max_input = _mm_max_epi16(inptr[0], inptr[1]);
+  min_input = _mm_min_epi16(inptr[0], inptr[1]);
+  for (i = 2; i < 4; i++) {
+    max_input = _mm_max_epi16(max_input, inptr[i]);
+    min_input = _mm_min_epi16(min_input, inptr[i]);
+  }
+  max_input = _mm_cmpgt_epi16(max_input, max);
+  min_input = _mm_cmplt_epi16(min_input, min);
+  temp1 = _mm_or_si128(max_input, min_input);
+  test = _mm_movemask_epi8(temp1);
+
+  if (!test) {
+    // Do the row transform (N.B. This transposes inptr)
+    idct16_sse2(inptr, inptr + 16);
+
+    // Find the min & max for the column transform
+    // N.B. Only first 4 cols contain non-zero coeffs
+    max_input = _mm_max_epi16(inptr[0], inptr[1]);
+    min_input = _mm_min_epi16(inptr[0], inptr[1]);
+    for (i = 2; i < 16; i++) {
+      max_input = _mm_max_epi16(max_input, inptr[i]);
+      min_input = _mm_min_epi16(min_input, inptr[i]);
+    }
+    max_input = _mm_cmpgt_epi16(max_input, max);
+    min_input = _mm_cmplt_epi16(min_input, min);
+    temp1 = _mm_or_si128(max_input, min_input);
+    test = _mm_movemask_epi8(temp1);
+
+    if (test) {
+      // Use fact only first 4 rows contain non-zero coeffs
+      array_transpose_8x8(inptr, inptr);
+      array_transpose_8x8(inptr + 8, inptr + 16);
+      for (i = 0; i < 4; i++) {
+        sign_bits = _mm_cmplt_epi16(inptr[i], zero);
+        temp1 = _mm_unpacklo_epi16(inptr[i], sign_bits);
+        temp2 = _mm_unpackhi_epi16(inptr[i], sign_bits);
+        _mm_storeu_si128((__m128i *)(outptr + 4 * (i * 4)), temp1);
+        _mm_storeu_si128((__m128i *)(outptr + 4 * (i * 4 + 1)), temp2);
+        sign_bits = _mm_cmplt_epi16(inptr[i + 16], zero);
+        temp1 = _mm_unpacklo_epi16(inptr[i + 16], sign_bits);
+        temp2 = _mm_unpackhi_epi16(inptr[i + 16], sign_bits);
+        _mm_storeu_si128((__m128i *)(outptr + 4 * (i * 4 + 2)), temp1);
+        _mm_storeu_si128((__m128i *)(outptr + 4 * (i * 4 + 3)), temp2);
+      }
+    } else {
+      // Set to use the optimised transform for the column
+      optimised_cols = 1;
+    }
+  } else {
+    // Run the un-optimised row transform
+    for (i = 0; i < 4; ++i) {
+      vp9_highbd_idct16_c(input, outptr, bd);
+      input += 16;
+      outptr += 16;
+    }
+  }
+
+  if (optimised_cols) {
+    idct16_sse2(inptr, inptr + 16);
+
+    // Final round & shift and Reconstruction and Store
+    {
+      __m128i d[2];
+      for (i = 0; i < 16; i++) {
+        inptr[i   ] = _mm_add_epi16(inptr[i   ], rounding);
+        inptr[i+16] = _mm_add_epi16(inptr[i+16], rounding);
+        d[0] = _mm_loadu_si128((const __m128i *)(dest + stride*i));
+        d[1] = _mm_loadu_si128((const __m128i *)(dest + stride*i + 8));
+        inptr[i   ] = _mm_srai_epi16(inptr[i   ], 6);
+        inptr[i+16] = _mm_srai_epi16(inptr[i+16], 6);
+        d[0] = clamp_high_sse2(_mm_add_epi16(d[0], inptr[i   ]), bd);
+        d[1] = clamp_high_sse2(_mm_add_epi16(d[1], inptr[i+16]), bd);
+        // Store
+        _mm_storeu_si128((__m128i *)(dest + stride*i), d[0]);
+        _mm_storeu_si128((__m128i *)(dest + stride*i + 8), d[1]);
+      }
+    }
+  } else {
+    // Run the un-optimised column transform
+    tran_low_t temp_in[16], temp_out[16];
+    for (i = 0; i < 16; ++i) {
+      for (j = 0; j < 16; ++j)
+        temp_in[j] = out[j * 16 + i];
+      vp9_highbd_idct16_c(temp_in, temp_out, bd);
+      for (j = 0; j < 16; ++j) {
+        dest[j * stride + i] = highbd_clip_pixel_add(
+            dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 6), bd);
+      }
+    }
+  }
+}
+#endif  // CONFIG_VP9_HIGHBITDEPTH
diff --git a/vp9/common/x86/vp9_idct_intrin_sse2.h b/vpx_dsp/x86/inv_txfm_sse2.h
index 984363d40..658a91487 100644
--- a/vp9/common/x86/vp9_idct_intrin_sse2.h
+++ b/vpx_dsp/x86/inv_txfm_sse2.h
@@ -1,5 +1,5 @@
 /*
- *  Copyright (c) 2014 The WebM project authors. All Rights Reserved.
+ *  Copyright (c) 2015 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
@@ -8,12 +8,13 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include <assert.h>
+#ifndef VPX_DSP_X86_INV_TXFM_SSE2_H_
+#define VPX_DSP_X86_INV_TXFM_SSE2_H_
+
 #include <emmintrin.h>  // SSE2
 #include "./vpx_config.h"
 #include "vpx/vpx_integer.h"
-#include "vp9/common/vp9_common.h"
-#include "vp9/common/vp9_idct.h"
+#include "vpx_dsp/inv_txfm.h"
 
 // perform 8x8 transpose
 static INLINE void array_transpose_8x8(__m128i *in, __m128i *res) {
@@ -172,3 +173,12 @@ static INLINE void write_buffer_8x16(uint8_t *dest, __m128i *in, int stride) {
   RECON_AND_STORE(dest + 14 * stride, in[14]);
   RECON_AND_STORE(dest + 15 * stride, in[15]);
 }
+
+void idct4_sse2(__m128i *in);
+void idct8_sse2(__m128i *in);
+void idct16_sse2(__m128i *in0, __m128i *in1);
+void iadst4_sse2(__m128i *in);
+void iadst8_sse2(__m128i *in);
+void iadst16_sse2(__m128i *in0, __m128i *in1);
+
+#endif  // VPX_DSP_X86_INV_TXFM_SSE2_H_
diff --git a/vp9/common/x86/vp9_idct_ssse3_x86_64.asm b/vpx_dsp/x86/inv_txfm_ssse3_x86_64.asm
index 2c1060710..2c1060710 100644
--- a/vp9/common/x86/vp9_idct_ssse3_x86_64.asm
+++ b/vpx_dsp/x86/inv_txfm_ssse3_x86_64.asm