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[common] rect/framebuffer: improve avx implementations

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This commit is contained in:
Geoffrey McRae 2023-11-19 15:45:15 +11:00
parent 0ce4c34c37
commit d3ee5bddde
3 changed files with 47 additions and 33 deletions
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3
common/include/common/rects.h
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@ -27,7 +27,8 @@
#include "common/framebuffer.h"
#include "common/types.h"
extern void (*rectCopyUnaligned)(uint8_t * dst, const uint8_t * src,
extern void (*rectCopyUnaligned)(
uint8_t *restrict dst, const uint8_t *restrict src,
int ystart, int yend, int dx, int dstPitch, int srcPitch, int width);
void rectsBufferToFramebuffer(FrameDamageRect * rects, int count, int bpp,

28
common/src/framebuffer.c
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@ -251,17 +251,15 @@ bool framebuffer_write_avx2(FrameBuffer * frame,
/* copy in chunks */
while (size > 127)
{
__m256i *_d = (__m256i *)d;
__m256i *_s = (__m256i *)s;
__m256i v1 = _mm256_stream_load_si256(_s + 0);
__m256i v2 = _mm256_stream_load_si256(_s + 1);
__m256i v3 = _mm256_stream_load_si256(_s + 2);
__m256i v4 = _mm256_stream_load_si256(_s + 3);
__m256i v1 = _mm256_stream_load_si256(s + 0);
__m256i v2 = _mm256_stream_load_si256(s + 1);
__m256i v3 = _mm256_stream_load_si256(s + 2);
__m256i v4 = _mm256_stream_load_si256(s + 3);
_mm256_stream_si256(_d + 0, v1);
_mm256_stream_si256(_d + 1, v2);
_mm256_stream_si256(_d + 2, v3);
_mm256_stream_si256(_d + 3, v4);
_mm256_stream_si256(d + 0, v1);
_mm256_stream_si256(d + 1, v2);
_mm256_stream_si256(d + 2, v3);
_mm256_stream_si256(d + 3, v4);
s += 4;
d += 4;
@ -274,13 +272,11 @@ bool framebuffer_write_avx2(FrameBuffer * frame,
if (size > 63)
{
__m256i *_d = (__m256i *)d;
__m256i *_s = (__m256i *)s;
__m256i v1 = _mm256_stream_load_si256(_s);
__m256i v2 = _mm256_stream_load_si256(_s + 1);
__m256i v1 = _mm256_stream_load_si256(s);
__m256i v2 = _mm256_stream_load_si256(s + 1);
_mm256_stream_si256(_d, v1);
_mm256_stream_si256(_d + 1, v2);
_mm256_stream_si256(d, v1);
_mm256_stream_si256(d + 1, v2);
s += 2;
d += 2;

35
common/src/rects.c
View File

@ -301,7 +301,8 @@ int rectsRejectContained(FrameDamageRect * rects, int count)
return removeRects(rects, count, removed);
}
static void rectCopyUnaligned_memcpy(uint8_t * dst, const uint8_t * src,
static void rectCopyUnaligned_memcpy(
uint8_t *restrict dst, const uint8_t *restrict src,
int ystart, int yend, int dx, int dstPitch, int srcPitch, int width)
{
src += ystart * srcPitch + dx;
@ -320,22 +321,37 @@ static void rectCopyUnaligned_memcpy(uint8_t * dst, const uint8_t * src,
#pragma GCC push_options
#pragma GCC target ("avx")
#endif
static void rectCopyUnaligned_avx(uint8_t * dst, const uint8_t * src,
static void rectCopyUnaligned_avx(
uint8_t *restrict dst, const uint8_t *restrict src,
int ystart, int yend, int dx, int dstPitch, int srcPitch, int width)
{
src += ystart * srcPitch + dx;
dst += ystart * dstPitch + dx;
const int nvec = width / sizeof(__m256i);
const int rem = width % sizeof(__m256i);
for (int i = ystart; i < yend; ++i)
{
int col;
for(col = 0; col <= width - 32; col += 32)
const __m256i *restrict s = (__m256i*)src;
__m256i *restrict d = (__m256i*)dst;
int vec;
for(vec = nvec; vec > 3; vec -= 4)
{
_mm_prefetch(src + col + 256, _MM_HINT_T0);
__m256i srcData = _mm256_loadu_si256((__m256i*)(src + col));
_mm256_storeu_si256((__m256i*)(dst + col), srcData);
_mm256_stream_si256(d + 0, _mm256_load_si256(s + 0));
_mm256_stream_si256(d + 1, _mm256_load_si256(s + 1));
_mm256_stream_si256(d + 2, _mm256_load_si256(s + 2));
_mm256_stream_si256(d + 3, _mm256_load_si256(s + 3));
s += 4;
d += 4;
}
for(; col < width; ++col)
for(; vec > 0; --vec, ++d, ++s)
_mm256_stream_si256(d, _mm256_load_si256(s));
for(int col = width - rem; col < width; ++col)
dst[col] = src[col];
src += srcPitch;
@ -348,7 +364,8 @@ static void rectCopyUnaligned_avx(uint8_t * dst, const uint8_t * src,
#pragma GCC pop_options
#endif
static void _rectCopyUnaligned(uint8_t * dst, const uint8_t * src,
static void _rectCopyUnaligned(
uint8_t *restrict dst, const uint8_t *restrict src,
int ystart, int yend, int dx, int dstPitch, int srcPitch, int width)
{
if (cpuInfo_getFeatures()->avx)