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2 instructions less (same speed)

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Originally committed as revision 6888 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2006-11-03 15:40:57 +00:00
parent 9347118237
commit e80cf125a7
1 changed files with 13 additions and 6 deletions
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19
libavcodec/i386/h264dsp_mmx.c
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@ -317,6 +317,17 @@ static void ff_h264_idct8_dc_add_mmx2(uint8_t *dst, int16_t *block, int stride)
"por "#t", "#o" \n\t"\
"psubusb "#a", "#o" \n\t"
// out: o = |x-y|>a
// clobbers: t
#define DIFF_GT2_MMX(x,y,a,o,t)\
"movq "#y", "#t" \n\t"\
"movq "#x", "#o" \n\t"\
"psubusb "#x", "#t" \n\t"\
"psubusb "#y", "#o" \n\t"\
"psubusb "#a", "#t" \n\t"\
"psubusb "#a", "#o" \n\t"\
"pcmpeqb "#t", "#o" \n\t"\
// in: mm0=p1 mm1=p0 mm2=q0 mm3=q1
// out: mm5=beta-1, mm7=mask
// clobbers: mm4,mm6
@ -398,9 +409,7 @@ static inline void h264_loop_filter_luma_mmx2(uint8_t *pix, int stride, int alph
/* filter p1 */
"movq (%1), %%mm3 \n\t" //p2
DIFF_GT_MMX(%%mm1, %%mm3, %%mm5, %%mm6, %%mm4) // |p2-p0|>beta-1
"pandn %%mm7, %%mm6 \n\t"
"pcmpeqb %%mm7, %%mm6 \n\t"
DIFF_GT2_MMX(%%mm1, %%mm3, %%mm5, %%mm6, %%mm4) // |p2-p0|>beta-1
"pand %%mm7, %%mm6 \n\t" // mask & |p2-p0|<beta
"movq 8+%0, %%mm4 \n\t" // can be merged with the and below but is slower then
"pand %%mm7, %%mm4 \n\t" // mask & tc0
@ -411,9 +420,7 @@ static inline void h264_loop_filter_luma_mmx2(uint8_t *pix, int stride, int alph
/* filter q1 */
"movq (%2,%3,2), %%mm4 \n\t" //q2
DIFF_GT_MMX(%%mm2, %%mm4, %%mm5, %%mm6, %%mm3) // |q2-q0|>beta-1
"pandn %0, %%mm6 \n\t"
"pcmpeqb %0, %%mm6 \n\t"
DIFF_GT2_MMX(%%mm2, %%mm4, %%mm5, %%mm6, %%mm3) // |q2-q0|>beta-1
"pand %0, %%mm6 \n\t"
"movq 8+%0, %%mm5 \n\t" // can be merged with the and below but is slower then
"pand %%mm6, %%mm5 \n\t"