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tweak mmx2 sad.

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6% faster on core2 and k8, no change on p4.

Originally committed as revision 8984 to svn://svn.ffmpeg.org/ffmpeg/trunk
pull/126/head
Loren Merritt 18 years ago
parent b3a257af27
commit eca3810e31
1 changed files with 21 additions and 33 deletions
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  1. 54
      libavcodec/i386/motion_est_mmx.c

54
libavcodec/i386/motion_est_mmx.c
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@ -75,13 +75,11 @@ static inline void sad8_1_mmx2(uint8_t *blk1, uint8_t *blk2, int stride, int h)
ASMALIGN(4)
"1: \n\t"
"movq (%1, %%"REG_a"), %%mm0 \n\t"
"movq (%2, %%"REG_a"), %%mm2 \n\t"
"psadbw %%mm2, %%mm0 \n\t"
"psadbw (%2, %%"REG_a"), %%mm0 \n\t"
"add %3, %%"REG_a" \n\t"
"movq (%1, %%"REG_a"), %%mm1 \n\t"
"movq (%2, %%"REG_a"), %%mm3 \n\t"
"psadbw %%mm1, %%mm3 \n\t"
"paddw %%mm3, %%mm0 \n\t"
"psadbw (%2, %%"REG_a"), %%mm1 \n\t"
"paddw %%mm1, %%mm0 \n\t"
"paddw %%mm0, %%mm6 \n\t"
"add %3, %%"REG_a" \n\t"
" js 1b \n\t"
@ -97,17 +95,13 @@ static inline void sad8_2_mmx2(uint8_t *blk1a, uint8_t *blk1b, uint8_t *blk2, in
ASMALIGN(4)
"1: \n\t"
"movq (%1, %%"REG_a"), %%mm0 \n\t"
"movq (%2, %%"REG_a"), %%mm2 \n\t"
"pavgb %%mm2, %%mm0 \n\t"
"movq (%3, %%"REG_a"), %%mm2 \n\t"
"psadbw %%mm2, %%mm0 \n\t"
"pavgb (%2, %%"REG_a"), %%mm0 \n\t"
"psadbw (%3, %%"REG_a"), %%mm0 \n\t"
"add %4, %%"REG_a" \n\t"
"movq (%1, %%"REG_a"), %%mm1 \n\t"
"movq (%2, %%"REG_a"), %%mm3 \n\t"
"pavgb %%mm1, %%mm3 \n\t"
"movq (%3, %%"REG_a"), %%mm1 \n\t"
"psadbw %%mm1, %%mm3 \n\t"
"paddw %%mm3, %%mm0 \n\t"
"pavgb (%2, %%"REG_a"), %%mm1 \n\t"
"psadbw (%3, %%"REG_a"), %%mm1 \n\t"
"paddw %%mm1, %%mm0 \n\t"
"paddw %%mm0, %%mm6 \n\t"
"add %4, %%"REG_a" \n\t"
" js 1b \n\t"
@ -120,30 +114,24 @@ static inline void sad8_4_mmx2(uint8_t *blk1, uint8_t *blk2, int stride, int h)
{ //FIXME reuse src
long len= -(stride*h);
asm volatile(
ASMALIGN(4)
"movq "MANGLE(bone)", %%mm5 \n\t"
ASMALIGN(4)
"1: \n\t"
"movq (%1, %%"REG_a"), %%mm0 \n\t"
"movq (%2, %%"REG_a"), %%mm2 \n\t"
"movq 1(%1, %%"REG_a"), %%mm1 \n\t"
"movq 1(%2, %%"REG_a"), %%mm3 \n\t"
"pavgb %%mm2, %%mm0 \n\t"
"pavgb %%mm1, %%mm3 \n\t"
"psubusb %%mm5, %%mm3 \n\t"
"pavgb %%mm3, %%mm0 \n\t"
"movq (%3, %%"REG_a"), %%mm2 \n\t"
"psadbw %%mm2, %%mm0 \n\t"
"pavgb (%2, %%"REG_a"), %%mm0 \n\t"
"pavgb 1(%2, %%"REG_a"), %%mm1 \n\t"
"psubusb %%mm5, %%mm1 \n\t"
"pavgb %%mm1, %%mm0 \n\t"
"psadbw (%3, %%"REG_a"), %%mm0 \n\t"
"add %4, %%"REG_a" \n\t"
"movq (%1, %%"REG_a"), %%mm1 \n\t"
"movq (%2, %%"REG_a"), %%mm3 \n\t"
"movq 1(%1, %%"REG_a"), %%mm2 \n\t"
"movq 1(%2, %%"REG_a"), %%mm4 \n\t"
"pavgb %%mm3, %%mm1 \n\t"
"pavgb %%mm4, %%mm2 \n\t"
"psubusb %%mm5, %%mm2 \n\t"
"pavgb %%mm1, %%mm2 \n\t"
"movq (%3, %%"REG_a"), %%mm1 \n\t"
"psadbw %%mm1, %%mm2 \n\t"
"movq (%1, %%"REG_a"), %%mm2 \n\t"
"movq 1(%1, %%"REG_a"), %%mm3 \n\t"
"pavgb (%2, %%"REG_a"), %%mm2 \n\t"
"pavgb 1(%2, %%"REG_a"), %%mm3 \n\t"
"psubusb %%mm5, %%mm3 \n\t"
"pavgb %%mm3, %%mm2 \n\t"
"psadbw (%3, %%"REG_a"), %%mm2 \n\t"
"paddw %%mm2, %%mm0 \n\t"
"paddw %%mm0, %%mm6 \n\t"
"add %4, %%"REG_a" \n\t"

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