[FFmpeg-devel] [PATCH] Set -mfpmath=sse for cpus that support it
Thu Aug 27 16:46:20 CEST 2009
On Thu, Aug 27, 2009 at 04:01:53PM +0200, Vitor Sessak wrote:
> M?ns Rullg?rd wrote:
> > You can't use check_cflags there. Is there any reason to not attempt
> > using this flag with --cpu values? I imagine a simple check_cflags
> > line together with the other x86 stuff (ebx checks etc) should be
> > enough.
> I can't just call "check_cflags -mfpmath=sse" for every x86 CPU because
> GCC does not fail with "-march=386 -mfpmath=sse", it gives a warning and
> uses 387 (so check_cflags would always add it). But I moved it to the
> more relevant part of the source (new patch attached).
Huh? That reads to me like "check_cflags -mfpmath=sse" would do exactly
the same thing (well, except for some ugly warnings).
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