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Re: 3dnow

Peter Soendergaard <soender@cs.utk.edu> writes:

> To the masses? I thought I was the only person still owning one!

:-)

By the way, have you or anyone else explored the 3dnow code in the
non-ieee compliance realm?  What happens when you would normally get
a nan or an inf?  Is there any clever way to know that your job never
hit these limits?

Take care,

> Seriously, this is actually a nice platform to test. It has some of the
> same weaknesses as the Athlon has with repect to code alignment, and since
> the 3dnow unit is a completely different unit than the floating point
> unit, I get 6 fold speedup using 3dnow. I go from 83 mflops with x87 code
> to 470 mflops using 3dnow! So this is perfect for testing the influence of
> cleanup code, since the cleanup code generated by Atlas will suck!
> compared to the 3dnow! code.
> 
> Cheers,
> 
> Peter
> On 26 Jun 2001, Camm Maguire wrote:
> 
> > Thanks Peter!  Nice to here your benching these on the k6 as well.
> > Numerical computing for the masses!
> >
> > Peter Soendergaard <soender@cs.utk.edu> writes:
> >
> > > Hi Camm,
> > >
> > > No it only uses 3dnow1 instructions, so you can run everything on a K6-2
> > > if you want to (I do). The only usefull thing from 3dnow2 that I have
> > > found is the SSE compliant prefetching.
> > >
> > > Cheers,
> > >
> > > Peter.
> > >
> > > On 25 Jun 2001, Camm Maguire wrote:
> > >
> > > >
> > > > Greetings!  Does the 3dnow in 3.2.1 use any 3dnow2 instructions, or is
> > > > it completely 3dnow1 compliant?
> > > >
> > > > Thanks!
> > > >
> > > >
> > > > --
> > > > Camm Maguire			     			camm@enhanced.com
> > > > ==========================================================================
> > > > "The earth is but one country, and mankind its citizens."  --  Baha'u'llah
> > > >
> > >
> > >
> > >
> >
> >
> 
> 
> 

-- 
Camm Maguire			     			camm@enhanced.com
==========================================================================
"The earth is but one country, and mankind its citizens."  --  Baha'u'llah