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Re: [Bug-gnubg] Optimization For Athlon Chip?


From: Jim Segrave
Subject: Re: [Bug-gnubg] Optimization For Athlon Chip?
Date: Sun, 16 Feb 2003 16:06:21 +0100
User-agent: Mutt/1.2.5.1i

On Sun 16 Feb 2003 (13:38 +0100), Achim Mueller wrote:
> Ouch!
> 
> I just made a quick test.
> 
> mHPMARiwu4UDIA, 36 Rollouts (default)
> 
> CFLAGS=" "  ---> 1 min. 5 sec.
> CFLAGS="-O3 -march=athlon-xp -mcpu=athlon-xp -mfpmath=sse" ---> 34 sec.
> 
> Whew!

More relevant wouldbe CFLAGS="-O" and CFLAGS="-O2". -O and -O2 are
generally considered safe optimisations - they will do things like
constant folding, strength reduction, restructuring tail recursion and
other optimisations at higher levels. They don't (as far as I know)
generally turn on any of the more architecture specific features.

-- 
Jim Segrave           address@hidden





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