[FFmpeg-devel] [RFC] Alpha support

Michael Niedermayer michaelni
Mon Feb 2 23:30:52 CET 2009


On Mon, Feb 02, 2009 at 09:38:16PM +0100, C?dric Schieli wrote:
> 2009/2/2 Michael Niedermayer <michaelni at gmx.at>
> 
> > you should not place the TIMER code inside the innermost loop as this
> > likely
> > affects how the loop is compiled
> >
> 
> > anyway the speed difference appears negligible
> >
> 
> By placing the TIMER code around the loop, I obtain a 2.4% slow down in the
> table version, which seems less negligible.
> I'll stick with the original version, there is only 12 line of duplicated
> code.

ok

also, independant of the patch it might be worth investigating if the other
tables also maybe could be replaced by shifts to speed things up.

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Many that live deserve death. And some that die deserve life. Can you give
it to them? Then do not be too eager to deal out death in judgement. For
even the very wise cannot see all ends. -- Gandalf
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: Digital signature
URL: <http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/attachments/20090202/8a75ae4c/attachment.pgp>



More information about the ffmpeg-devel mailing list