[Ffmpeg-devel] a little optim for a SSE version of H263_LOOP_FILTER

[skal]

  Hi everybody,

 in case, it seems to me a SSE version of
 H263_LOOP_FILTER is possible by replacing
       "psubusb %%mm4, %%mm2           \n\t"\
       "movq %%mm2, %%mm3              \n\t"\
       "psubusb %%mm4, %%mm3           \n\t"\
       "psubb %%mm3, %%mm2             \n\t"\
 at dsputil_mmx.c:587 (fresh cvs), by:
       "psubusb %%mm4, %%mm2           \n\t"\
       "pminub %%mm4, %%mm2           \n\t"\

 +maybe a little re-org of the loop (mm3 is gone).

 Well, this is just for the fun of it, since the speed-up
 (if any) might not be worth a special version...

  bye!

Skal

(gotta love these saturated instructions. All of h263's
UpDownRamp() with 2 instructions is quite fun)