Date: Wed, 9 Mar 2005 04:43:42 -0500 From: Charles Swiger <cswiger@mac.com> To: Divacky Roman <xdivac02@stud.fit.vutbr.cz> Cc: current@freebsd.org Subject: Re: amd64 default CFLAGS Message-ID: <7b51c88b50f4f6b9244a901d05a5c284@mac.com> In-Reply-To: <20050309092749.GA72315@stud.fit.vutbr.cz> References: <20050309092749.GA72315@stud.fit.vutbr.cz>
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On Mar 9, 2005, at 4:27 AM, Divacky Roman wrote: > why is it necessary (if its at all) to have this: > -mfpmath=387 -mno-sse -mno-sse2 -mno-mmx -mno-3dnow in default CFLAGS > for amd64 > architecture? > > does it serve anypurpose? sse is used in amd64 code so I dont see why > we > disables gcc to use it.. gcc-3.4.x for AMD64 apparently has a number of code generation bugs and trying to do MMX or SSE on the AMD64 platform is not going to be entirely reliable until those issues get worked out. -- -Chuck
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