[FFmpeg-devel] [PATCH] Faster CABAC H.264 residual decoding

Guillaume POIRIER poirierg
Mon May 5 09:58:43 CEST 2008

On 5/5/08, Alexander Strange <astrange at ithinksw.com> wrote:
>  On May 4, 2008, at 3:11 PM, Guillaume POIRIER wrote:

>  > While trying to write an smart reply to your mail, I asked Google what
>  > it knew about PPC and predicates (I vaguely remembered that PPC had
>  > some support for writing assmebly with predicates).
>  > The best source I found was this piece: http://www.warthman.com/ex-CWG.htm
>  >
>  > I'm sorry to see that this time around both x86 and Itanium has a much
>  > more useful instructions to optimize the code snippets you pasted.
>  >
>  > :-(
>  >
>  > Guillaume
> I thought they'd added 'isel' (same as cmov) to PPCs newer than the
>  G5, but it doesn't seem to be in Cell. That's kind of weird.

Well, a quick Googling told me that "isel" has been added to Power ISA
v.2.04, while both Cell PPE and PPC970 comply to Power ISA v.2.03
More information here:

I don't measure a man's success by how high he climbs but how high he
bounces when he hits bottom.
 -- George S. Patton

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