[Mplayer-cvslog] CVS: main/libmpcodecs vf_ilpack.c,1.2,1.3

[D Richard Felker III]

On Mon, Dec 15, 2003 at 09:11:14AM +0100, Michael Niedermayer wrote:
> Hi
> 
> On Monday 15 December 2003 05:07, Richard Felker CVS wrote:
> > Update of /cvsroot/mplayer/main/libmpcodecs
> > In directory mail:/var/tmp.root/cvs-serv10112/libmpcodecs
> >
> > Modified Files:
> > 	vf_ilpack.c
> > Log Message:
> > mmx optimizations
> [...]
> > +		"punpcklbw %%mm0, %%mm1 \n\t"
> > +		"punpckhbw %%mm0, %%mm2 \n\t"
> [...]
> > +		"movq %%mm4, %%mm3 \n\t"
> > +		"movq %%mm6, %%mm5 \n\t"
> > +		"punpcklwd %%mm0, %%mm3 \n\t"
> > +		"punpckhwd %%mm0, %%mm4 \n\t"
> > +		"punpcklwd %%mm0, %%mm5 \n\t"
> > +		"punpckhwd %%mm0, %%mm6 \n\t"
> > +		"pslld $8, %%mm3 \n\t"
> > +		"pslld $8, %%mm4 \n\t"
> > +		"pslld $24, %%mm5 \n\t"
> > +		"pslld $24, %%mm6 \n\t"
> > +
> > +		"por %%mm3, %%mm1 \n\t"
> > +		"por %%mm4, %%mm2 \n\t"
> > +		"por %%mm5, %%mm1 \n\t"
> > +		"por %%mm6, %%mm2 \n\t"
> hmm, why not
> 
> packuswb %%mm4, %%mm4
> packuswb %%mm6, %%mm6
> punpcklbw %%mm6, %%mm4
> punpcklbw %%mm4, %%mm0
> punpckhbw %%mm4, %%mm1

Feel free to make it faster if you can. I'm no mmx god. I intended mm0
to stay all-zero for the entire loop so it doesn't have to be
reloaded, but reloading it with 0's probably takes less time than your
optims save.

Rich