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

[Måns Rullgård]

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.

-- 
M?ns Rullg?rd
mans at mansr.com