We might want to mark the -p4 flag as 'deprecated'... This is for the now
VERY old (ca. 6 years) x86 chips (netburst)... However, a lot of people seem
to assume their core/core2/nehalam chips are Pentium 4's so would use the
-p4 flag when they really shouldn't.
> -----Original Message-----
> From: amber-developers-bounces.ambermd.org [mailto:amber-developers-
> bounces.ambermd.org] On Behalf Of Scott Brozell
> Sent: Tuesday, October 13, 2009 2:57 PM
> To: AMBER Developers Mailing List
> Subject: Re: [AMBER-Developers] -p4 intel switch of configure script
>
> Hi,
>
> Just committed this:
> Removed -pentium Options for Solaris Intel Pentium
> Changed -p4 Use optimizations specific for the Intel Pentium4
> processor
> to -sse Use optimizations for the SSE family of vector
> processors
> This still needs work esp for gnu and intel where there are many
> options.
>
> bbl,
> scott
>
> On Tue, Oct 13, 2009 at 12:03:36PM -0700, MengJuei Hsieh wrote:
> >
> > I'd also vote to retire '-p4', but we might need something like -
> sse2/3/3e
> > or -mmx/-3dnow/-enhanced3dnow that kind of stuff.
> >
> > Pentium 4, -mtune=pentium4 (or older switch of -march=pentium4) in
> gcc,
> > probably means MMX, SSE and SSE2 instruction set support. It's the
> default
> > in ifort if I remembered it right.
> >
> > > From: case <case.biomaps.rutgers.edu>
> > > On Mon, Oct 12, 2009, MengJuei Hsieh wrote:
> > >>
> > >> There is probably a place of switches in AMBER/AT configure script
> need to
> > >> be changed:
> > >> when -p4 and intel switches are used
> > >
> > > My recommendation is to deep-six the -p4 switch...is that needed
> anymore?
> > > I'm not even sure what "pentium 4" means -- doesn't that precede
> x86_64?
>
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Received on Tue Oct 13 2009 - 16:00:02 PDT
