[Ffmpeg-devel] Re: [PATCH] SIMD accelected SNOW decoding

Reimar Döffinger Reimar.Doeffinger
Sat Dec 3 20:19:37 CET 2005

On Wed, Nov 30, 2005 at 11:24:52PM +0100, Guillaume POIRIER wrote:
> Please find in attachment the fixed files, which should be tested, if
> possible, on IA-32 and AMD64.

Works fine for me, but no speedup at all with my sample.

> Now I'm off to find a solution to fix 'inner_add_yblock_mmx' (which
> still segfault when it executes the instruction 'movdqa
> (%rdi),%xmm3').

Activating this again finally gives a speedup, around 10%, and no
crashes with my sample. Maybe you can make yours available?
If it doesn't crash either I suspect either compiler bug (I used gcc
4.0.0 from gentoo) or a missing/wrong clobber list.
Or did I miss anything else? I didn't have too close a look at it.

Reimar D?ffinger

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