[x265] [PATCH 4 of 9] asm:intra pred dc32 sse2

[chen]

At 2015-03-06 08:19:57,dtyx265 at gmail.com wrote:
># HG changeset patch
># User David T Yuen <dtyx265 at gmail.com>
># Date 1425594719 28800
># Node ID 912c42dcb4d9b399515e6c1ed6be70db3bf5f675
># Parent  c5fa433ffda0a95889e99f4df787f3edc5880d0f
>asm:intra pred dc32 sse2
>
>This replaces c code for systems using ssse3 to sse2 processors
>The code is backported from intrapred dc32 sse4
>
>64-bit
>
>./test/TestBench --testbench intrapred | grep intra_dc_32x32
>intra_dc_32x32[f=0]	4.53x 	 1650.00  	 7474.94
>
>32-bit
>
>./test/TestBench --testbench intrapred | grep intra_dc_32x32
>intra_dc_32x32[f=0]	7.79x 	 1749.94  	 13627.45
>
>diff -r c5fa433ffda0 -r 912c42dcb4d9 source/common/x86/asm-primitives.cpp
>--- a/source/common/x86/asm-primitives.cpp	Thu Mar 05 13:54:48 2015 -0800
>+++ b/source/common/x86/asm-primitives.cpp	Thu Mar 05 14:31:59 2015 -0800
>@@ -1213,6 +1213,7 @@
>         p.cu[BLOCK_4x4].intra_pred[DC_IDX] = x265_intra_pred_dc4_sse2;
>         p.cu[BLOCK_8x8].intra_pred[DC_IDX] = x265_intra_pred_dc8_sse2;
>         p.cu[BLOCK_16x16].intra_pred[DC_IDX] = x265_intra_pred_dc16_sse2;
>+        p.cu[BLOCK_32x32].intra_pred[DC_IDX] = x265_intra_pred_dc32_sse2;
> 
>         p.cu[BLOCK_4x4].intra_pred[PLANAR_IDX] = x265_intra_pred_planar4_sse2;
> 
>diff -r c5fa433ffda0 -r 912c42dcb4d9 source/common/x86/intrapred.h
>--- a/source/common/x86/intrapred.h	Thu Mar 05 13:54:48 2015 -0800
>+++ b/source/common/x86/intrapred.h	Thu Mar 05 14:31:59 2015 -0800
>@@ -29,6 +29,7 @@
> void x265_intra_pred_dc4_sse2(pixel* dst, intptr_t dstStride, const pixel*srcPix, int, int filter);
> void x265_intra_pred_dc8_sse2(pixel* dst, intptr_t dstStride, const pixel*srcPix, int, int filter);
> void x265_intra_pred_dc16_sse2(pixel* dst, intptr_t dstStride, const pixel*srcPix, int, int filter);
>+void x265_intra_pred_dc32_sse2(pixel* dst, intptr_t dstStride, const pixel*srcPix, int, int filter);
> void x265_intra_pred_dc4_sse4(pixel* dst, intptr_t dstStride, const pixel*srcPix, int, int filter);
> void x265_intra_pred_dc8_sse4(pixel* dst, intptr_t dstStride, const pixel* srcPix, int, int filter);
> void x265_intra_pred_dc16_sse4(pixel* dst, intptr_t dstStride, const pixel* srcPix, int, int filter);
>diff -r c5fa433ffda0 -r 912c42dcb4d9 source/common/x86/intrapred8.asm
>--- a/source/common/x86/intrapred8.asm	Thu Mar 05 13:54:48 2015 -0800
>+++ b/source/common/x86/intrapred8.asm	Thu Mar 05 14:31:59 2015 -0800
>@@ -495,6 +495,46 @@
> ;---------------------------------------------------------------------------------------------
> ; void intra_pred_dc(pixel* dst, intptr_t dstStride, pixel *srcPix, int dirMode, int bFilter)
> ;---------------------------------------------------------------------------------------------
>+INIT_XMM sse2
>+cglobal intra_pred_dc32, 3, 3, 5
>+    pxor            m0,            m0
>+    movu            m1,            [r2 + 1]
>+    movu            m2,            [r2 + 17]
>+    movu            m3,            [r2 + 65]
>+    movu            m4,            [r2 + 81]
>+    psadbw          m1,            m0
>+    psadbw          m2,            m0
>+    psadbw          m3,            m0
>+    psadbw          m4,            m0
>+    paddw           m1,            m2
>+    paddw           m3,            m4
>+    paddw           m1,            m3
>+    pshufd          m2,            m1, 2
>+    paddw           m1,            m2
>+
>+    paddw           m1,            [pw_32]
>+    psraw           m1,            6
>+    pmullw          m1,            [pw_257]
>+    pshuflw         m1,            m1, 0x00       ; m1 = byte [dc_val ...]
>+    pshufd          m1,            m1, 0x00
>+
>+%assign x 0
>+%rep 16
>+    ; store DC 16x16
>+    movu            [r0],               m1
>+    movu            [r0 + r1],          m1
>+    movu            [r0 + 16],          m1
>+    movu            [r0 + r1 + 16],     m1
>+%if x < 16
>+    lea             r0,            [r0 + 2 * r1]
>+%endif
we may buffer r1*3 to reduce count of LEA

>+%assign x x+1
>+%endrep
>+    RET
>+
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