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Code Issues Releases Activity

get_pixels_sse2, ~+12% performance compared to mmx

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Originally committed as revision 15591 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2008-10-09 18:36:49 +00:00
parent 965530e156
commit f76543c9b9
1 changed files with 35 additions and 0 deletions
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35
libavcodec/i386/dsputilenc_mmx.c
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@ -56,6 +56,40 @@ static void get_pixels_mmx(DCTELEM *block, const uint8_t *pixels, int line_size)
); );
} }
static void get_pixels_sse2(DCTELEM *block, const uint8_t *pixels, int line_size)
{
asm volatile(
"pxor %%xmm7, %%xmm7 \n\t"
"movq (%0), %%xmm0 \n\t"
"movq (%0, %2), %%xmm1 \n\t"
"movq (%0, %2,2), %%xmm2 \n\t"
"movq (%0, %3), %%xmm3 \n\t"
"lea (%0,%2,4), %0 \n\t"
"punpcklbw %%xmm7, %%xmm0 \n\t"
"punpcklbw %%xmm7, %%xmm1 \n\t"
"punpcklbw %%xmm7, %%xmm2 \n\t"
"punpcklbw %%xmm7, %%xmm3 \n\t"
"movdqa %%xmm0, (%1) \n\t"
"movdqa %%xmm1, 16(%1) \n\t"
"movdqa %%xmm2, 32(%1) \n\t"
"movdqa %%xmm3, 48(%1) \n\t"
"movq (%0), %%xmm0 \n\t"
"movq (%0, %2), %%xmm1 \n\t"
"movq (%0, %2,2), %%xmm2 \n\t"
"movq (%0, %3), %%xmm3 \n\t"
"punpcklbw %%xmm7, %%xmm0 \n\t"
"punpcklbw %%xmm7, %%xmm1 \n\t"
"punpcklbw %%xmm7, %%xmm2 \n\t"
"punpcklbw %%xmm7, %%xmm3 \n\t"
"movdqa %%xmm0, 64(%1) \n\t"
"movdqa %%xmm1, 80(%1) \n\t"
"movdqa %%xmm2, 96(%1) \n\t"
"movdqa %%xmm3, 112(%1) \n\t"
: "+r" (pixels)
: "r" (block), "r" ((x86_reg)line_size), "r" ((x86_reg)line_size*3)
);
}
static inline void diff_pixels_mmx(DCTELEM *block, const uint8_t *s1, const uint8_t *s2, int stride) static inline void diff_pixels_mmx(DCTELEM *block, const uint8_t *s1, const uint8_t *s2, int stride)
{ {
asm volatile( asm volatile(
@ -1375,6 +1409,7 @@ void dsputilenc_init_mmx(DSPContext* c, AVCodecContext *avctx)
} }
if(mm_flags & MM_SSE2){ if(mm_flags & MM_SSE2){
c->get_pixels = get_pixels_sse2;
c->sum_abs_dctelem= sum_abs_dctelem_sse2; c->sum_abs_dctelem= sum_abs_dctelem_sse2;
c->hadamard8_diff[0]= hadamard8_diff16_sse2; c->hadamard8_diff[0]= hadamard8_diff16_sse2;
c->hadamard8_diff[1]= hadamard8_diff_sse2; c->hadamard8_diff[1]= hadamard8_diff_sse2;