[vlc-devel] [PATCH] add ARM/NEON version of simple channel mixer
jb at videolan.org
Thu Oct 4 22:09:17 CEST 2012
On Thu, Oct 04, 2012 at 11:06:42PM +0300, Rémi Denis-Courmont wrote :
> Le jeudi 4 octobre 2012 22:56:08, Jean-Baptiste Kempf a écrit :
> > On Thu, Oct 04, 2012 at 10:46:44PM +0300, Rémi Denis-Courmont wrote :
> > > This seems to lack any sort of unrolling, so the speed will be much worse
> > > than it could be. If we just want lame optimizations, I would argue for
> > > intrinsics rather than ASM.
> > >
> > > No hard objections though.
> > Can we commit with a warning about this unrolling, for now?
> > Or is it not good enough ?
> I don't know. Is it significantly faster than GCC code?
It seems, to me, that when I benchmarked the functions it was between 3x
and 8x depending on the mode. But maybe I mis-remember.
http://www.jbkempf.com/ - +33 672 704 734
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