Date: Fri, 6 Sep 2002 18:57:25 -0700 From: Kris Kennaway <kris@obsecurity.org> To: Kenneth Culver <culverk@yumyumyum.org> Cc: Kris Kennaway <kris@obsecurity.org>, Maxime Henrion <mux@FreeBSD.ORG>, cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, current@FreeBSD.ORG Subject: Re: HEADS UP: SSE instructions (Re: cvs commit: src/share/mk bsd.cpu.mk) Message-ID: <20020907015725.GA85652@xor.obsecurity.org> In-Reply-To: <20020906214850.J46717-100000@alpha.yumyumyum.org> References: <20020907014136.GB85013@xor.obsecurity.org> <20020906214850.J46717-100000@alpha.yumyumyum.org>
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--7JfCtLOvnd9MIVvH Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Sep 06, 2002 at 09:49:41PM -0400, Kenneth Culver wrote: > > I assume the compiler is not stupid enough to try and use both when that > > is impossible. Don't forget this is all just passing a CPU name to gcc > > which actually decides what instructions to use. >=20 > That's not what I mean... What I mean is that if one application is using > SSE, and the other wants to use 3dnow, this will incur a performance > penalty (although I'm not sure how much or how noticable it is), so some > people may not want to have SSE enabled. Don't set CPUTYPE then, if you know better than the compiler how to optimize your system. Kris --7JfCtLOvnd9MIVvH Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.7 (FreeBSD) iD8DBQE9eV0EWry0BWjoQKURAusWAKD0OfkvGpC1LWsznlhEXfRQbdot8gCfUfah YYxWx3UjL0jVusejQFnRTlc= =PHW+ -----END PGP SIGNATURE----- --7JfCtLOvnd9MIVvH-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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