Merge "vp9_quantize_fp_avx2()"

1 files changed, 140 insertions, 0 deletions

diff --git a/vp9/encoder/x86/vp9_quantize_avx2.c b/vp9/encoder/x86/vp9_quantize_avx2.c
new file mode 100644
index 000000000..4bebc34d6
--- /dev/null
+++ b/vp9/encoder/x86/vp9_quantize_avx2.c
@@ -0,0 +1,140 @@
+/*
+ *  Copyright (c) 2017 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 <assert.h>
+#include <immintrin.h>  // AVX2
+
+#include "./vp9_rtcd.h"
+#include "vpx/vpx_integer.h"
+#include "vpx_dsp/vpx_dsp_common.h"
+#include "vpx_dsp/x86/bitdepth_conversion_avx2.h"
+#include "vpx_dsp/x86/quantize_x86.h"
+
+// Zero fill 8 positions in the output buffer.
+static INLINE void store_zero_tran_low(tran_low_t *a) {
+  const __m256i zero = _mm256_setzero_si256();
+#if CONFIG_VP9_HIGHBITDEPTH
+  _mm256_storeu_si256((__m256i *)(a), zero);
+  _mm256_storeu_si256((__m256i *)(a + 8), zero);
+#else
+  _mm256_storeu_si256((__m256i *)(a), zero);
+#endif
+}
+
+static INLINE __m256i scan_eob_256(const __m256i *iscan_ptr,
+                                   __m256i *coeff256) {
+  const __m256i iscan = _mm256_loadu_si256(iscan_ptr);
+  const __m256i zero256 = _mm256_setzero_si256();
+#if CONFIG_VP9_HIGHBITDEPTH
+  // The _mm256_packs_epi32() in load_tran_low() packs the 64 bit coeff as
+  // B1 A1 B0 A0.  Shuffle to B1 B0 A1 A0 in order to scan eob correctly.
+  const __m256i _coeff256 = _mm256_permute4x64_epi64(*coeff256, 0xd8);
+  const __m256i zero_coeff0 = _mm256_cmpeq_epi16(_coeff256, zero256);
+#else
+  const __m256i zero_coeff0 = _mm256_cmpeq_epi16(*coeff256, zero256);
+#endif
+  const __m256i nzero_coeff0 = _mm256_cmpeq_epi16(zero_coeff0, zero256);
+  // Add one to convert from indices to counts
+  const __m256i iscan_plus_one = _mm256_sub_epi16(iscan, nzero_coeff0);
+  return _mm256_and_si256(iscan_plus_one, nzero_coeff0);
+}
+
+void vp9_quantize_fp_avx2(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
+                          int skip_block, const int16_t *round_ptr,
+                          const int16_t *quant_ptr, tran_low_t *qcoeff_ptr,
+                          tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr,
+                          uint16_t *eob_ptr, const int16_t *scan_ptr,
+                          const int16_t *iscan_ptr) {
+  __m128i eob;
+  __m256i round256, quant256, dequant256;
+  __m256i eob256, thr256;
+
+  (void)scan_ptr;
+  (void)skip_block;
+  assert(!skip_block);
+
+  coeff_ptr += n_coeffs;
+  iscan_ptr += n_coeffs;
+  qcoeff_ptr += n_coeffs;
+  dqcoeff_ptr += n_coeffs;
+  n_coeffs = -n_coeffs;
+
+  {
+    __m256i coeff256;
+
+    // Setup global values
+    {
+      const __m128i round = _mm_load_si128((const __m128i *)round_ptr);
+      const __m128i quant = _mm_load_si128((const __m128i *)quant_ptr);
+      const __m128i dequant = _mm_load_si128((const __m128i *)dequant_ptr);
+      round256 = _mm256_castsi128_si256(round);
+      round256 = _mm256_permute4x64_epi64(round256, 0x54);
+
+      quant256 = _mm256_castsi128_si256(quant);
+      quant256 = _mm256_permute4x64_epi64(quant256, 0x54);
+
+      dequant256 = _mm256_castsi128_si256(dequant);
+      dequant256 = _mm256_permute4x64_epi64(dequant256, 0x54);
+    }
+
+    {
+      __m256i qcoeff256;
+      __m256i qtmp256;
+      coeff256 = load_tran_low(coeff_ptr + n_coeffs);
+      qcoeff256 = _mm256_abs_epi16(coeff256);
+      qcoeff256 = _mm256_adds_epi16(qcoeff256, round256);
+      qtmp256 = _mm256_mulhi_epi16(qcoeff256, quant256);
+      qcoeff256 = _mm256_sign_epi16(qtmp256, coeff256);
+      store_tran_low(qcoeff256, qcoeff_ptr + n_coeffs);
+      coeff256 = _mm256_mullo_epi16(qcoeff256, dequant256);
+      store_tran_low(coeff256, dqcoeff_ptr + n_coeffs);
+    }
+
+    eob256 = scan_eob_256((const __m256i *)(iscan_ptr + n_coeffs), &coeff256);
+    n_coeffs += 8 * 2;
+  }
+
+  // remove dc constants
+  dequant256 = _mm256_permute2x128_si256(dequant256, dequant256, 0x31);
+  quant256 = _mm256_permute2x128_si256(quant256, quant256, 0x31);
+  round256 = _mm256_permute2x128_si256(round256, round256, 0x31);
+
+  thr256 = _mm256_srai_epi16(dequant256, 1);
+
+  // AC only loop
+  while (n_coeffs < 0) {
+    __m256i coeff256 = load_tran_low(coeff_ptr + n_coeffs);
+    __m256i qcoeff256 = _mm256_abs_epi16(coeff256);
+    int32_t nzflag =
+        _mm256_movemask_epi8(_mm256_cmpgt_epi16(qcoeff256, thr256));
+
+    if (nzflag) {
+      __m256i qtmp256;
+      qcoeff256 = _mm256_adds_epi16(qcoeff256, round256);
+      qtmp256 = _mm256_mulhi_epi16(qcoeff256, quant256);
+      qcoeff256 = _mm256_sign_epi16(qtmp256, coeff256);
+      store_tran_low(qcoeff256, qcoeff_ptr + n_coeffs);
+      coeff256 = _mm256_mullo_epi16(qcoeff256, dequant256);
+      store_tran_low(coeff256, dqcoeff_ptr + n_coeffs);
+      eob256 = _mm256_max_epi16(
+          eob256,
+          scan_eob_256((const __m256i *)(iscan_ptr + n_coeffs), &coeff256));
+    } else {
+      store_zero_tran_low(qcoeff_ptr + n_coeffs);
+      store_zero_tran_low(dqcoeff_ptr + n_coeffs);
+    }
+    n_coeffs += 8 * 2;
+  }
+
+  eob = _mm_max_epi16(_mm256_castsi256_si128(eob256),
+                      _mm256_extracti128_si256(eob256, 1));
+
+  *eob_ptr = accumulate_eob(eob);
+}