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

[Ronald S. Bultje]

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

Ronald