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[common] add runtime detection and selection of AVX/AVX2 support

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This commit is contained in:
Geoffrey McRae
2023-11-19 02:52:11 +11:00
parent 5d4c1d348c
commit 3330f83af6
6 changed files with 245 additions and 14 deletions
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57
common/src/rects.c
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@@ -20,8 +20,10 @@
#include "common/rects.h"
#include "common/util.h"
#include "common/cpuinfo.h"
#include <stdlib.h>
#include <immintrin.h>
struct Corner
{
@@ -298,3 +300,58 @@ int rectsRejectContained(FrameDamageRect * rects, int count)
return removeRects(rects, count, removed);
}
static void rectCopyUnaligned_memcpy(uint8_t * dst, const uint8_t * src,
int ystart, int yend, int dx, int dstPitch, int srcPitch, int width)
{
src += ystart * srcPitch + dx;
dst += ystart * dstPitch + dx;
for (int i = ystart; i < yend; ++i)
{
memcpy(dst, src, width);
src += srcPitch;
dst += dstPitch;
}
}
#pragma GCC push_options
#pragma GCC target ("avx2")
static void rectCopyUnaligned_avx(uint8_t * dst, const uint8_t * src,
int ystart, int yend, int dx, int dstPitch, int srcPitch, int width)
{
src += ystart * srcPitch + dx;
dst += ystart * dstPitch + dx;
for (int i = ystart; i < yend; ++i)
{
int col;
for(col = 0; col <= width - 32; col += 32)
{
_mm_prefetch(src + col + 256, _MM_HINT_T0);
__m256i srcData = _mm256_loadu_si256((__m256i*)(src + col));
_mm256_storeu_si256((__m256i*)(dst + col), srcData);
}
for(; col < width; ++col)
dst[col] = src[col];
src += srcPitch;
dst += dstPitch;
}
}
#pragma GCC pop_options
static void _rectCopyUnaligned(uint8_t * dst, const uint8_t * src,
int ystart, int yend, int dx, int dstPitch, int srcPitch, int width)
{
if (cpuInfo_getFeatures()->avx)
rectCopyUnaligned = &rectCopyUnaligned_avx;
else
rectCopyUnaligned = &rectCopyUnaligned_memcpy;
return rectCopyUnaligned(
dst, src, ystart, yend, dx, dstPitch, srcPitch, width);
}
void (*rectCopyUnaligned)(uint8_t * dst, const uint8_t * src,
int ystart, int yend, int dx, int dstPitch, int srcPitch, int width) =
&_rectCopyUnaligned;