Re: [gentoo-user] march athlon-xp to athlon64

[Raymond Lewis Rebbeck]

Yes they are for different architectures, the main architectural difference 
being the addition of sse2 in athlon64 cpus. There may possibly be other 
differences in how gcc optimizes based on that -march setting, however i'm 
not 100% certain if this is the case, I suspect not.

On Wednesday, 31 May 2006 19:22, Ralph Slooten wrote:
> > AFAIK '-march=athlon-xp -msse2' is equivalent to '-march=athlon64'
>
> Interesting. Maybe someone else can clarify this? It might be the reason
> I had these flags to start off with, but again.... I'm not sure. The
> gentoo wiki implies they are for different architectures:  Athlon XP
> (AMD) <=>  Opteron/Athlon64 (AMD)

-- 
Raymond Lewis Rebbeck
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