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 Message-ID: <20030226184315.F91528@alpha.siliconlandmark.com> In-Reply-To: <20030226215547.GA5510@gw.tex.bogus> References: <xzpy943xnhx.fsf@flood.ping.uio.no> <20030226113815.W5357@znfgre.tberna.bet> <20030226200635.GA1368@torment.storming.org> <20030226215547.GA5510@gw.tex.bogus>
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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/ > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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