[FFmpeg-devel] [flamefest-start] A little something on MMX/SSE intrinsics

Michael Niedermayer michaelni
Wed Feb 27 19:20:35 CET 2008

On Wed, Feb 27, 2008 at 05:42:58PM +0200, Ivan Kalvachev wrote:
> On Wed, Feb 27, 2008 at 4:31 PM, Reimar D?ffinger
> <Reimar.Doeffinger at stud.uni-karlsruhe.de> wrote:
> > Hello,
> >  yet another case of someone relearning "intrinsics are still a mess and
> >  compilers still much too stupid" ;-) :
> >  http://www.virtualdub.org/blog/pivot/entry.php?id=188#body
> >
> >  Let's see if we can make today the flame-heaviest day in FFmpeg history
> >  :-)
> Nice read.
> I'd just like to add that there is already architecture in FFmpeg that
> is entirely optimized on intrinsics - AltiVect. There were few
> fundamental problems with it and I'm not sure if they have been
> successfully solved. These include things like generating code that
> picks up processor SIMD dialect at runtime.

You just found us a new SOC qualification task
rewrite intrinsics to proper asm()

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Let us carefully observe those good qualities wherein our enemies excel us
and endeavor to excel them, by avoiding what is faulty, and imitating what
is excellent in them. -- Plutarch
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