Fedora development switch to GCC 4.1.0-RH prerelease

[Arjan van de Ven]

On Thu, 2005-12-08 at 10:36 -0800, Jesse Barnes wrote:
> On Thursday, December 8, 2005 10:15 am, Arjan van de Ven wrote:
> > > Arjan mentioned the other day that the Fedora linker is capable of
> > > loading CPU specific libraries, depending on which ISA extensions
> > > are available.  Since gcc 4.1 has a much improved autovectorizer,
> > > maybe now is the time to start making use of it?  It seems like
> > > codec libraries are good candidates for autovectorization, maybe
> > > their spec files could build SSE2, SSE3, and 3dnow variants along
> > > with the regular, non-SIMD versions of the libraries?
> >
> > on x86-64 that's already there. on x86.. why ?
> 
> There are still lots of x86 machines out there, including the upcoming, 
> dual-core Yonah chip, so providing SIMD versions of the libraries for 
> x86 is worthwhile, IMO.
> 
> Which libraries have vectorized variants on x86-64?  I only saw one for 
> my x86 box...

on x86-64 all do.. SSE2 etc are "core" features there and don't need
special dirs, it's part of the normal ABI