Date: Sun, 23 Mar 2003 17:56:59 +0000 From: Bruce Cran <bruce@cran.org.uk> To: Michael Nottebrock <michaelnottebrock@gmx.net> Cc: current@freebsd.org Subject: Re: libm problem Message-ID: <20030323175659.GA2558@fourtytwo.brucec.backnet> In-Reply-To: <200303231843.16545.michaelnottebrock@gmx.net> References: <20030318173051.GA2322@f111.hadiko.de> <20030323070808.0d3f63c0.fearow@attbi.com> <20030323170244.GA1911@f111.hadiko.de> <200303231843.16545.michaelnottebrock@gmx.net>
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On Sun, Mar 23, 2003 at 06:43:16PM +0100, Michael Nottebrock wrote: > > Just out of curiousity, have you tried using -mfpmath=sse? I remember someone > on this list claiming that the SSE fpa-code works much better than the i387 > code which is used by default (even with -march=pentium4). > I don't know if SSE code runs faster, but it defitely seems to fix bad code generation when optimizing for athlon-xp architecture. For example, -O2 -march=athlon-xp produces broken code, whereas -O2 -march=athlon-xp -mfpmath=sse produces programs which work. Bruce Cran To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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