[FFmpeg-devel] [PATCH] Improve handling of cmov usage enablement

Diego Biurrun diego
Sat Nov 1 13:55:06 CET 2008

On Sat, Nov 01, 2008 at 01:52:02PM +0100, Dominik 'Rathann' Mierzejewski wrote:
> The attached patch enables CMOV by default on x86_64 arch, because
> all x86_64 CPUs have it. It doesn't enable fast_cmov, because x86_64
> includes some NetBurst-architecture CPUs from Intel, which are known
> to have a slow implementation of CMOV.
> The second part of the patch disables fast_cmov for the "i686" cpu
> target, because that target might include NetBurst-arch CPUs.
> OK to apply?

Looks OK to me, but I'm no CPU wizard..


More information about the ffmpeg-devel mailing list