From owner-freebsd-current  Wed Feb 26 15:48: 7 2003
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Date: Wed, 26 Feb 2003 18:47:57 -0500 (EST)
From: Andre Guibert de Bruet <andy@siliconlandmark.com>
To: Nuno Teixeira <nunotex@aeiou.pt>
Cc: current@FreeBSD.ORG
Subject: Re: -O2 considered harmful
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On Wed, 26 Feb 2003, Nuno Teixeira wrote:

> Does -march=k6-2 implies -m3dnow? Or -march=pentiumpro implies -mmmx?
>
> I always thought that when I use -march it will enable other
> porcessor specific optimizations like mmx and 3dnow (if available).

IIRC, 166 and 180 Mhz PPros don't support MMX.

I'm seeing differences in compiled code between simple -march=athlon-xp
and -march=athlon-xp -mmmx -m3dnow -msse.

Regards,

> Andre Guibert de Bruet | Enterprise Software Consultant >
> Silicon Landmark, LLC. | http://siliconlandmark.com/    >

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