[MPlayer-dev-eng] [PATCH] SSE detection fix for NetBSD/amd64
guillaume.poirier at etudiant.univ-rennes1.fr
Sun Jan 9 19:10:55 CET 2005
Le vendredi 07 janvier 2005 à 18:42 +0100, Aurelien Jacobs a écrit :
> I didn't found any way to test OS SSE support on x86-64.
> But AFAIK, there is no x86-64 OS which don't support SSE.
> I guess it's safe to assume SEE support on x86-64, whatever the OS is.
> So I propose the following patch, which should make everyone happy.
> Anyone against it ?
I'm not. This patch does work well, and allows some faster code to be
I posted a bench last Thursday on XviD mailling list to compare the
x86-64 version against IA-32.
Here are the new figures:
XviD Pure C | XviD Edouard SIMD | lavc + SIMD
Pass 1: 37fps | 78fps SSE: 90fps | 82fps SSE: 84fps
Pass 2: 11fps | 32fps SSE: 36fps | 30fps SSE: 30fps
Well, I'm quite puzzled why lavc doesn't get boosted by the activation
of SSE, but regarding XviD, when It's run with a SSE1|2-aware mencoder,
it gets a bonus 12%... not bad. Not bad at all!
So to sum it all: I'm all for it!
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