Date: Fri, 6 Sep 2002 18:41:36 -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: <20020907014136.GB85013@xor.obsecurity.org> In-Reply-To: <20020906212438.J46717-100000@alpha.yumyumyum.org> References: <20020907012324.GA84837@xor.obsecurity.org> <20020906212438.J46717-100000@alpha.yumyumyum.org>
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--l76fUT7nc3MelDdI Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Fri, Sep 06, 2002 at 09:28:28PM -0400, Kenneth Culver wrote: > Athlon XP processors support SSE instructions, but not at the same > time as 3dnow instructions. The processor has to switch modes or > something like that. What if a user wants to actually use the 3dnow > instructions? Does this mean that on an athlon XP which supports SSE > instructions, if you don't want to enable them you'll catch SIGILL > and die when using those "certain apps?" Just wondering. 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. Kris --l76fUT7nc3MelDdI Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.7 (FreeBSD) iD8DBQE9eVlPWry0BWjoQKURAqKPAJ9F0DmFuRtzartgTewi8QulF6J8BQCgnXqq CLjQxQQ5CbrlG8rSO95Pros= =X5SA -----END PGP SIGNATURE----- --l76fUT7nc3MelDdI-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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