From owner-cvs-all Fri Sep 6 18:41:47 2002 Delivered-To: cvs-all@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id DE24D37B400; Fri, 6 Sep 2002 18:41:38 -0700 (PDT) Received: from obsecurity.dyndns.org (adsl-64-165-226-88.dsl.lsan03.pacbell.net [64.165.226.88]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5C67043E6E; Fri, 6 Sep 2002 18:41:37 -0700 (PDT) (envelope-from kris@obsecurity.org) Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id B3DA966C4E; Fri, 6 Sep 2002 18:41:36 -0700 (PDT) Date: Fri, 6 Sep 2002 18:41:36 -0700 From: Kris Kennaway To: Kenneth Culver Cc: Kris Kennaway , Maxime Henrion , 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> References: <20020907012324.GA84837@xor.obsecurity.org> <20020906212438.J46717-100000@alpha.yumyumyum.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="l76fUT7nc3MelDdI" Content-Disposition: inline In-Reply-To: <20020906212438.J46717-100000@alpha.yumyumyum.org> User-Agent: Mutt/1.4i Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG --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