Re: Altivec tools?
With assembly is the way you want to do it anyway. That is how they
did the MMX versions, and I would actually try and port as much of
that as possible. Many of the macroized functions can possibly be
implemented with altivec instructions or combinations instead of mmx
instructions. That way you get for free a lot of code above that
just works. It looks like someone has already started this for you:
idctaltivec.c and idctaltivec.h? They don't appear to be too
complete, however, more like just a framework start. Don't forget
the -m7400.
a
Daniel Jacobowitz wrote:
>
> On Thu, Aug 23, 2001 at 08:02:29AM +0200, Michel Lanners wrote:
> > Hi all,
> >
> > Anybody have a quick step guide to working with Altivec under
> > Debian for PPC? Any .debs (doubt it)?
> >
> > I'm trying to make use of vlc's Altivec-accelerated IDCT (which so far
> > is only meant for MacOS X and doesn't work), so I obviously need an
> > Altivec-enabled toolchain.
> >
> > I've had a look at altivec.org; their tools seem to be relatively old.
> > Is that still the best bet? Are the new gcc-3.0 tools Altivec-enabled?
> >
> > Any gotchas I should know about?
>
> I'm guessing it's in C with the Moto extensions, rather than assembly,
> then? The current assembler is perfectly happy with altivec (might
> need to pass -m7400). GCC does not support altivec in any way, won't
> for the forseeable future, and will almost certainly never support the
> (badly designed - no flames, please, not again...) Motorola extensions.
>
> You're pretty much out of luck. Someone could theoretically package
> the Altivec-ized GCC they put together - but there may be licensing
> issues (not sure) and there are definitely major bugs. I don't
> recommend it at all.
>
> --
> Daniel Jacobowitz Carnegie Mellon University
> MontaVista Software Debian GNU/Linux Developer
>
> --
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