mirror of https://git.ffmpeg.org/ffmpeg.git
2 instructions less (same speed)
Originally committed as revision 6888 to svn://svn.ffmpeg.org/ffmpeg/trunk
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@ -317,6 +317,17 @@ static void ff_h264_idct8_dc_add_mmx2(uint8_t *dst, int16_t *block, int stride)
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"por "#t", "#o" \n\t"\
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"psubusb "#a", "#o" \n\t"
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// out: o = |x-y|>a
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// clobbers: t
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#define DIFF_GT2_MMX(x,y,a,o,t)\
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"movq "#y", "#t" \n\t"\
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"movq "#x", "#o" \n\t"\
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"psubusb "#x", "#t" \n\t"\
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"psubusb "#y", "#o" \n\t"\
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"psubusb "#a", "#t" \n\t"\
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"psubusb "#a", "#o" \n\t"\
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"pcmpeqb "#t", "#o" \n\t"\
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// in: mm0=p1 mm1=p0 mm2=q0 mm3=q1
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// out: mm5=beta-1, mm7=mask
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// clobbers: mm4,mm6
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@ -398,9 +409,7 @@ static inline void h264_loop_filter_luma_mmx2(uint8_t *pix, int stride, int alph
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/* filter p1 */
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"movq (%1), %%mm3 \n\t" //p2
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DIFF_GT_MMX(%%mm1, %%mm3, %%mm5, %%mm6, %%mm4) // |p2-p0|>beta-1
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"pandn %%mm7, %%mm6 \n\t"
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"pcmpeqb %%mm7, %%mm6 \n\t"
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DIFF_GT2_MMX(%%mm1, %%mm3, %%mm5, %%mm6, %%mm4) // |p2-p0|>beta-1
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"pand %%mm7, %%mm6 \n\t" // mask & |p2-p0|<beta
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"movq 8+%0, %%mm4 \n\t" // can be merged with the and below but is slower then
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"pand %%mm7, %%mm4 \n\t" // mask & tc0
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@ -411,9 +420,7 @@ static inline void h264_loop_filter_luma_mmx2(uint8_t *pix, int stride, int alph
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/* filter q1 */
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"movq (%2,%3,2), %%mm4 \n\t" //q2
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DIFF_GT_MMX(%%mm2, %%mm4, %%mm5, %%mm6, %%mm3) // |q2-q0|>beta-1
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"pandn %0, %%mm6 \n\t"
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"pcmpeqb %0, %%mm6 \n\t"
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DIFF_GT2_MMX(%%mm2, %%mm4, %%mm5, %%mm6, %%mm3) // |q2-q0|>beta-1
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"pand %0, %%mm6 \n\t"
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"movq 8+%0, %%mm5 \n\t" // can be merged with the and below but is slower then
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"pand %%mm6, %%mm5 \n\t"
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