GMP on Pentium 2

delta trinity deltatrinity at
Tue Oct 21 20:41:24 CEST 2003

Humm, probably yes.

Maybe something have been optimized in Athlon asm files and not done in P2 
asm files.  Like if when compiling for P2, a generic Pentium 1 file is used 
and when compiling for Athlin, it's using athlon-specific files.  Well, I 
can only guess... :)

>From: Carl Devore <devore at>
>To: delta trinity <deltatrinity at>
>CC: <gmp-discuss at>
>Subject: Re: GMP on Pentium 2
>Date: Tue, 21 Oct 2003 12:47:13 -0400 (EDT)
>On Tue, 21 Oct 2003, delta trinity wrote:
> > Well, this may be due to several things.  First, I assume that both
> > processors are running at the same speed
> >...
> > First, we would have to see how much cache is present in both systems.  
> > the P2 have less L1/L2 cache than the athlon
>I think the OP was saying that both tests were run on the **same** system.
>The only difference is that in one case he compiled the code **as if** it
>were on an Athlon, even though it was on a Pentium 2.  Thus, the OP
>wonders why optimizing for an Athlon actually works better on a Pentium 2
>than optimizing for a Pentium 2.

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