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

[Michael Niedermayer]

On Mon, Sep 27, 2010 at 09:15:24PM -0400, Ronald S. Bultje wrote:
> Hi,
> 
> 2010/9/27 M?ns Rullg?rd <mans at mansr.com>:
> > Michael Niedermayer <michaelni at gmx.at> writes:
> >> On Tue, Sep 28, 2010 at 01:51:33AM +0200, Michael Niedermayer wrote:
> >>> On Sat, May 29, 2010 at 08:27:58PM +0200, Reimar D?ffinger wrote:
> >>> > Hello,
> >>> > this is not suitable by far (among other things, ugly parts, split asm code
> >>> > where a clobber is likely to introduce bugs, only tested to compile,
> >>>
> >>> > did not find a nice "dummy" clobber constraint - particularly important since
> >>>
> >>> try "%esp" ;)
> >>>
> >>>
> >>> > I suspect older gccs won't accept %xmm clobbers, ...).
> >>>
> >>> the oldest i have here is 3.3 and it supports it
> >>
> >> has someone tested xmm clobbers on fate alraedy?
> >> if not i think we should commit one and see what fails
> >> then we can decide if we need a macro wraping them at all
> >
> > We tested. ?It failed.
> 
> See r24931 and r24934 in vp3dsp_sse2.c.
> 
> http://archives.free.net.ph/message/20100825.195706.b4de9543.en.html
> http://archives.free.net.ph/message/20100825.203635.00f52a36.en.html

do you happen to remember the error messages and which compiler version
was affected?

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I do not agree with what you have to say, but I'll defend to the death your
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