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pinsrw instruction allows reading 2 bytes directly into an xmm register.

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Saving a gpr register allows the register to not be pushed for now, and in future it can be used to point to color conversion matrix or alpha channel.

R=harryjin@google.com
BUG=libyuv:488

Review URL: https://webrtc-codereview.appspot.com/52789004.
This commit is contained in:
Frank Barchard 2015-08-28 17:03:54 -07:00
parent be11f500f0
commit 0735245c52
1 changed files with 5 additions and 7 deletions
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12
source/row_win.cc
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@ -2378,14 +2378,12 @@ void I422ToABGRRow_AVX2(const uint8* y_buf,
// Read 2 UV from 411, upsample to 8 UV.
#define READYUV411 __asm { \
__asm movzx ebx, word ptr [esi] /* U */ /* NOLINT */ \
__asm movd xmm0, ebx \
__asm movzx ebx, word ptr [esi + edi] /* V */ /* NOLINT */ \
__asm movd xmm1, ebx \
__asm pinsrw xmm0, [esi], 0 /* U */ \
__asm pinsrw xmm1, [esi + edi], 0 /* V */ \
__asm lea esi, [esi + 2] \
__asm punpcklbw xmm0, xmm1 /* UV */ \
__asm punpcklwd xmm0, xmm0 /* UVUV (upsample) */ \
__asm punpckldq xmm0, xmm0 /* UVUVUVUV (upsample) */ \
__asm punpcklbw xmm0, xmm1 /* UV */ \
__asm punpcklwd xmm0, xmm0 /* UVUV (upsample) */ \
__asm punpckldq xmm0, xmm0 /* UVUVUVUV (upsample) */ \
}
// Read 4 UV from NV12, upsample to 8 UV.