[FFmpeg-devel] [RFC] clobbers for XMM registers
Ronald S. Bultje
Tue Sep 28 03:15:24 CEST 2010
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.
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