Date: Thu, 16 Aug 2001 15:03:45 -0700 From: Kris Kennaway <kris@obsecurity.org> To: Kenneth W Cochran <kwc@world.std.com> Cc: Kris Kennaway <kris@obsecurity.org>, freebsd-stable@freebsd.org Subject: Re: New kernel option CPU_ENABLE_SSE Message-ID: <20010816150345.A79841@xor.obsecurity.org> In-Reply-To: <200108162200.SAA21031@world.std.com>; from kwc@world.std.com on Thu, Aug 16, 2001 at 06:00:40PM -0400 References: <200108162020.QAA14274@world.std.com> <200108162200.SAA21031@world.std.com>
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--1yeeQ81UyVL57Vl7 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Aug 16, 2001 at 06:00:40PM -0400, Kenneth W Cochran wrote: > Ok, so how can I tell if a given CPU supports that feature? >=20 > I see a "feature list" in the kernel startup, and in the > case of a Pentium-III, SSE is at the "end" of that list; is > that the Definitive Indicator? If so, what's to keep the > kernel from detecting and enabling it (per config-option, > for example)? (kernel complexity, for example...) Yeah, it could probably be done that way. > Am I correct in assuming that "older generation" 686 CPUs > (i.e. pre-Pentium-III) don't support SSE & that SSE is a > function/enhancement of "newer generation" CPUs? Yes. I think it came in with the Pentium III. Kris --1yeeQ81UyVL57Vl7 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (FreeBSD) Comment: For info see http://www.gnupg.org iD8DBQE7fENBWry0BWjoQKURAp1DAJ9eeZ6jwtZrz7rOQg+NdB+OkNltLgCgm8t2 rNdAED4BIrZNx9YRVTjvl6U= =iIg5 -----END PGP SIGNATURE----- --1yeeQ81UyVL57Vl7-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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