[Ffmpeg-devel] [PATCH] SSE counterpart of ff_imdct_calc_3dn2

Guillaume POIRIER poirierg
Thu Aug 24 09:46:50 CEST 2006


On 8/24/06, Rich Felker <dalias at aerifal.cx> wrote:
> On Thu, Aug 24, 2006 at 09:53:05AM +0800, Zuxy Meng wrote:
> > Hi,
> >
> > 2006/8/23, Michael Niedermayer <michaelni at gmx.at>:
> > >Hi
> > >
> > >ive no objections to the patch (i didnt had any to the earlier patch
> > >either)
> > >i just still think the loops would be better in asm then for(){}
> >
> > I still insist that intrinsics help produce better code, at least on gcc4.
> And I still insist that this statement is fundamentally false. Better
> than what? Whatever code gcc generates with the intrinsics, you can
> always generate the same or better code if you just write it yourself.

Yes, you ca

> Intrinsics are also gcc4-specific and have the problem that
> performance is subject to the whims (and bugs) of gcc, whose record is
> very bad...

A thing is not necessarily true because a man dies for it.
-- Oscar Wilde

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