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Merge pull request #6433 from hrydgard/optimize-uninitialize-xfb-memory 

SSE-optimize UninitializeXFBMemory
This commit is contained in:
Pierre Bourdon 2018-03-13 12:42:24 +01:00 committed by GitHub
parent 90ca62e416 6cbb716f60
commit 8a2cc14656
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 30 additions and 11 deletions
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41
Source/Core/VideoCommon/TextureCacheBase.cpp
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@ -8,6 +8,9 @@
#include <memory>
#include <string>
#include <utility>
#if defined(_M_X86) || defined(_M_X86_64)
#include <pmmintrin.h>
#endif
#include "Common/Align.h"
#include "Common/Assert.h"
@ -1783,24 +1786,40 @@ void TextureCacheBase::CopyRenderTargetToTexture(u32 dstAddr, EFBCopyFormat dstF
void TextureCacheBase::UninitializeXFBMemory(u8* dst, u32 stride, u32 bytes_per_row,
u32 num_blocks_y)
{
// Originally, we planned on using a 'key color'
// for alpha to address partial xfbs (Mario Strikers / Chicken Little).
// This work was removed since it was unfinished but there
// was still a desire to differentiate between the old and the new approach
// which is why we still set uninitialized xfb memory to fuchsia
// (Y=1,U=254,V=254) instead of dark green (Y=0,U=0,V=0) in YUV
// like is done in the EFB path.
// Originally, we planned on using a 'key color'
// for alpha to address partial xfbs (Mario Strikers / Chicken Little).
// This work was removed since it was unfinished but there
// was still a desire to differentiate between the old and the new approach
// which is why we still set uninitialized xfb memory to fuchsia
// (Y=1,U=254,V=254) instead of dark green (Y=0,U=0,V=0) in YUV
// like is done in the EFB path.
// This comment is indented wrong because of the silly linter, btw.
#if defined(_M_X86) || defined(_M_X86_64)
__m128i sixteenBytes = _mm_set1_epi16((s16)(u16)0xFE01);
#endif
for (u32 i = 0; i < num_blocks_y; i++)
{
for (u32 offset = 0; offset < bytes_per_row; offset++)
u32 size = bytes_per_row;
u8* rowdst = dst;
#if defined(_M_X86) || defined(_M_X86_64)
while (size >= 16)
{
if (offset % 2)
_mm_storeu_si128((__m128i*)rowdst, sixteenBytes);
size -= 16;
rowdst += 16;
}
#endif
for (u32 offset = 0; offset < size; offset++)
{
if (offset & 1)
{
dst[offset] = 254;
rowdst[offset] = 254;
}
else
{
dst[offset] = 1;
rowdst[offset] = 1;
}
}
dst += stride;