Remove usage of predict buffer for decode

Instead of using the predict buffer, the decoder now writes
the predictor into the recon buffer.  For blocks with eob=0,
unnecessary idcts can be eliminated.  This gave a performance
boost of ~1.8% for the HD clips used.

Tero: Added needed changes to ARM side and scheduled some
      assembly code to prevent interlocks.

Patch Set 6:  Merged (I1bcdca7a95aacc3a181b9faa6b10e3a71ee24df3)
into this commit because of similarities in the idct
functions.
Patch Set 7: EC bug fix.

Change-Id: Ie31d90b5d3522e1108163f2ac491e455e3f955e6

1 files changed, 0 insertions, 281 deletions

diff --git a/vp8/common/arm/armv6/recon_v6.asm b/vp8/common/arm/armv6/recon_v6.asm
deleted file mode 100644
index 99c7bcf2d..000000000
--- a/vp8/common/arm/armv6/recon_v6.asm
+++ /dev/null
@@ -1,281 +0,0 @@
-;
-;  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.
-;
-
-
-    EXPORT  |vp8_recon_b_armv6|
-    EXPORT  |vp8_recon2b_armv6|
-    EXPORT  |vp8_recon4b_armv6|
-
-    AREA    |.text|, CODE, READONLY  ; name this block of code
-prd     RN  r0
-dif     RN  r1
-dst     RN  r2
-stride      RN  r3
-
-;void recon_b(unsigned char *pred_ptr, short *diff_ptr, unsigned char *dst_ptr, int stride)
-; R0 char* pred_ptr
-; R1 short * dif_ptr
-; R2 char * dst_ptr
-; R3 int stride
-
-; Description:
-; Loop through the block adding the Pred and Diff together.  Clamp and then
-; store back into the Dst.
-
-; Restrictions :
-; all buffers are expected to be 4 byte aligned coming in and
-; going out.
-;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
-;
-;
-;
-;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
-|vp8_recon_b_armv6| PROC
-    stmdb   sp!, {r4 - r9, lr}
-
-    ;0, 1, 2, 3
-    ldr     r4, [prd], #16          ; 3 | 2 | 1 | 0
-    ldr     r6, [dif, #0]           ;     1 |     0
-    ldr     r7, [dif, #4]           ;     3 |     2
-
-    pkhbt   r8, r6, r7, lsl #16     ;     2 |     0
-    pkhtb   r9, r7, r6, asr #16     ;     3 |     1
-
-    uxtab16 r8, r8, r4              ;     2 |     0  +  3 | 2 | 2 | 0
-    uxtab16 r9, r9, r4, ror #8      ;     3 |     1  +  0 | 3 | 2 | 1
-
-    usat16  r8, #8, r8
-    usat16  r9, #8, r9
-    add     dif, dif, #32
-    orr     r8, r8, r9, lsl #8
-
-    str     r8, [dst], stride
-
-    ;0, 1, 2, 3
-    ldr     r4, [prd], #16          ; 3 | 2 | 1 | 0
-;;  ldr     r6, [dif, #8]           ;     1 |     0
-;;  ldr     r7, [dif, #12]          ;     3 |     2
-    ldr     r6, [dif, #0]           ;     1 |     0
-    ldr     r7, [dif, #4]           ;     3 |     2
-
-    pkhbt   r8, r6, r7, lsl #16     ;     2 |     0
-    pkhtb   r9, r7, r6, asr #16     ;     3 |     1
-
-    uxtab16 r8, r8, r4              ;     2 |     0  +  3 | 2 | 2 | 0
-    uxtab16 r9, r9, r4, ror #8      ;     3 |     1  +  0 | 3 | 2 | 1
-
-    usat16  r8, #8, r8
-    usat16  r9, #8, r9
-    add     dif, dif, #32
-    orr     r8, r8, r9, lsl #8
-
-    str     r8, [dst], stride
-
-    ;0, 1, 2, 3
-    ldr     r4, [prd], #16          ; 3 | 2 | 1 | 0
-;;  ldr     r6, [dif, #16]          ;     1 |     0
-;;  ldr     r7, [dif, #20]          ;     3 |     2
-    ldr     r6, [dif, #0]           ;     1 |     0
-    ldr     r7, [dif, #4]           ;     3 |     2
-
-    pkhbt   r8, r6, r7, lsl #16     ;     2 |     0
-    pkhtb   r9, r7, r6, asr #16     ;     3 |     1
-
-    uxtab16 r8, r8, r4              ;     2 |     0  +  3 | 2 | 2 | 0
-    uxtab16 r9, r9, r4, ror #8      ;     3 |     1  +  0 | 3 | 2 | 1
-
-    usat16  r8, #8, r8
-    usat16  r9, #8, r9
-    add     dif, dif, #32
-    orr     r8, r8, r9, lsl #8
-
-    str     r8, [dst], stride
-
-    ;0, 1, 2, 3
-    ldr     r4, [prd], #16          ; 3 | 2 | 1 | 0
-;;  ldr     r6, [dif, #24]          ;     1 |     0
-;;  ldr     r7, [dif, #28]          ;     3 |     2
-    ldr     r6, [dif, #0]           ;     1 |     0
-    ldr     r7, [dif, #4]           ;     3 |     2
-
-    pkhbt   r8, r6, r7, lsl #16     ;     2 |     0
-    pkhtb   r9, r7, r6, asr #16     ;     3 |     1
-
-    uxtab16 r8, r8, r4              ;     2 |     0  +  3 | 2 | 2 | 0
-    uxtab16 r9, r9, r4, ror #8      ;     3 |     1  +  0 | 3 | 2 | 1
-
-    usat16  r8, #8, r8
-    usat16  r9, #8, r9
-    orr     r8, r8, r9, lsl #8
-
-    str     r8, [dst], stride
-
-    ldmia   sp!, {r4 - r9, pc}
-
-    ENDP    ; |recon_b|
-
-;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
-;
-;
-;
-;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
-; R0 char  *pred_ptr
-; R1 short *dif_ptr
-; R2 char  *dst_ptr
-; R3 int stride
-|vp8_recon4b_armv6| PROC
-    stmdb   sp!, {r4 - r9, lr}
-
-    mov     lr, #4
-
-recon4b_loop
-    ;0, 1, 2, 3
-    ldr     r4, [prd], #4           ; 3 | 2 | 1 | 0
-    ldr     r6, [dif, #0]           ;     1 |     0
-    ldr     r7, [dif, #4]           ;     3 |     2
-
-    pkhbt   r8, r6, r7, lsl #16     ;     2 |     0
-    pkhtb   r9, r7, r6, asr #16     ;     3 |     1
-
-    uxtab16 r8, r8, r4              ;     2 |     0  +  3 | 2 | 2 | 0
-    uxtab16 r9, r9, r4, ror #8      ;     3 |     1  +  0 | 3 | 2 | 1
-
-    usat16  r8, #8, r8
-    usat16  r9, #8, r9
-    orr     r8, r8, r9, lsl #8
-
-    str     r8, [dst]
-
-    ;4, 5, 6, 7
-    ldr     r4, [prd], #4
-;;  ldr     r6, [dif, #32]
-;;  ldr     r7, [dif, #36]
-    ldr     r6, [dif, #8]
-    ldr     r7, [dif, #12]
-
-    pkhbt   r8, r6, r7, lsl #16
-    pkhtb   r9, r7, r6, asr #16
-
-    uxtab16 r8, r8, r4
-    uxtab16 r9, r9, r4, ror #8
-    usat16  r8, #8, r8
-    usat16  r9, #8, r9
-    orr     r8, r8, r9, lsl #8
-
-    str     r8, [dst, #4]
-
-    ;8, 9, 10, 11
-    ldr     r4, [prd], #4
-;;  ldr     r6, [dif, #64]
-;;  ldr     r7, [dif, #68]
-    ldr     r6, [dif, #16]
-    ldr     r7, [dif, #20]
-
-    pkhbt   r8, r6, r7, lsl #16
-    pkhtb   r9, r7, r6, asr #16
-
-    uxtab16 r8, r8, r4
-    uxtab16 r9, r9, r4, ror #8
-    usat16  r8, #8, r8
-    usat16  r9, #8, r9
-    orr     r8, r8, r9, lsl #8
-
-    str     r8, [dst, #8]
-
-    ;12, 13, 14, 15
-    ldr     r4, [prd], #4
-;;  ldr     r6, [dif, #96]
-;;  ldr     r7, [dif, #100]
-    ldr     r6, [dif, #24]
-    ldr     r7, [dif, #28]
-
-    pkhbt   r8, r6, r7, lsl #16
-    pkhtb   r9, r7, r6, asr #16
-
-    uxtab16 r8, r8, r4
-    uxtab16 r9, r9, r4, ror #8
-    usat16  r8, #8, r8
-    usat16  r9, #8, r9
-    orr     r8, r8, r9, lsl #8
-
-    str     r8, [dst, #12]
-
-    add     dst, dst, stride
-;;  add     dif, dif, #8
-    add     dif, dif, #32
-
-    subs    lr, lr, #1
-    bne     recon4b_loop
-
-    ldmia   sp!, {r4 - r9, pc}
-
-    ENDP    ; |Recon4B|
-
-;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
-;
-;
-;
-;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
-; R0 char  *pred_ptr
-; R1 short *dif_ptr
-; R2 char  *dst_ptr
-; R3 int stride
-|vp8_recon2b_armv6| PROC
-    stmdb   sp!, {r4 - r9, lr}
-
-    mov     lr, #4
-
-recon2b_loop
-    ;0, 1, 2, 3
-    ldr     r4, [prd], #4
-    ldr     r6, [dif, #0]
-    ldr     r7, [dif, #4]
-
-    pkhbt   r8, r6, r7, lsl #16
-    pkhtb   r9, r7, r6, asr #16
-
-    uxtab16 r8, r8, r4
-    uxtab16 r9, r9, r4, ror #8
-    usat16  r8, #8, r8
-    usat16  r9, #8, r9
-    orr     r8, r8, r9, lsl #8
-
-    str     r8, [dst]
-
-    ;4, 5, 6, 7
-    ldr     r4, [prd], #4
-;;  ldr     r6, [dif, #32]
-;;  ldr     r7, [dif, #36]
-    ldr     r6, [dif, #8]
-    ldr     r7, [dif, #12]
-
-    pkhbt   r8, r6, r7, lsl #16
-    pkhtb   r9, r7, r6, asr #16
-
-    uxtab16 r8, r8, r4
-    uxtab16 r9, r9, r4, ror #8
-    usat16  r8, #8, r8
-    usat16  r9, #8, r9
-    orr     r8, r8, r9, lsl #8
-
-    str     r8, [dst, #4]
-
-    add     dst, dst, stride
-;;  add     dif, dif, #8
-    add     dif, dif, #16
-
-    subs    lr, lr, #1
-    bne     recon2b_loop
-
-    ldmia   sp!, {r4 - r9, pc}
-
-    ENDP    ; |Recon2B|
-
-    END