[FFmpeg-devel] [RFC] clobbers for XMM registers

Michael Niedermayer michaelni
Tue Sep 28 16:30:11 CEST 2010

On Tue, Sep 28, 2010 at 03:22:15PM +0100, M?ns Rullg?rd wrote:
> Michael Niedermayer <michaelni at gmx.at> writes:
> > On Tue, Sep 28, 2010 at 09:36:40AM -0400, Ronald S. Bultje wrote:
> >> Hi,
> >> 
> >> On Tue, Sep 28, 2010 at 8:34 AM, Michael Niedermayer <michaelni at gmx.at> wrote:
> >> > you want to execute code from vp3dsp_sse2.c on a pre SSE cpu?
> >> 
> >> All _sse2 files are templates files that are included in dsputil_mmx.c
> >> or similar.
> >
> > we could add the flags to dsputil_mmx then
> That would allow the compiler to use SSE instructions in functions
> that should be MMX only.

the question is if it does in reality if not its a non issue.

> > or split the file.
> That would require either duplication or obfuscation.

eloborate, i dont see how either could result from a code split.

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Concerning the gods, I have no means of knowing whether they exist or not
or of what sort they may be, because of the obscurity of the subject, and
the brevity of human life -- Protagoras
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