[FFmpeg-devel] [PATCH v2] SH4 mpegaudio decoder optimizations

[Michael Niedermayer]

On Wed, Dec 15, 2010 at 01:26:20AM +0100, Guennadi Liakhovetski wrote:
> On Tue, 14 Dec 2010, Reimar D?ffinger wrote:
[...]
> > > +    : [hi] "+r" (u.u32[1]),                          \
> > > +      [lo] "+r" (u.u32[0]),                          \
> > > +      [wp] "+r" (wp),                                \
> > > +      [pp] "+r" (pp)                                 \
> > 
> > Do all compilers/compiler versions that are in use support
> > named asm arguments?
> 
> Do you know any ones, used for SH, where this is not supported? I don't.
> 
> > I also think as a paranoia measure these should be +&r
> > (but I admit I never understood that so 100%).
> 
> hm, don't remember seeing this - early clobber input-output? Does it make

ive seen it be needed once but its rare, i dont know if this was by gcc bug or
intended. Both are possible considering the unprecise docs

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

Those who are too smart to engage in politics are punished by being
governed by those who are dumber. -- Plato 
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