"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
/* 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
/* 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"