Date: Fri, 17 Aug 2001 10:03:41 +1200 From: "Juha Saarinen" <juha@saarinen.org> To: "'Kenneth W Cochran'" <kwc@world.std.com>, "'Kris Kennaway'" <kris@obsecurity.org> Cc: <freebsd-stable@freebsd.org> Subject: RE: New kernel option CPU_ENABLE_SSE Message-ID: <01ef01c1269f$4f5635b0$0a01a8c0@den2> In-Reply-To: <200108162200.SAA21031@world.std.com>
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Go to Intel's Web site? Pentium 4, for instance, comes with SSE2. Is there anything in the FreeBSD OS code that makes use of SSE? -- Juha :: -----Original Message----- :: From: owner-freebsd-stable@FreeBSD.ORG :: [mailto:owner-freebsd-stable@FreeBSD.ORG] On Behalf Of :: Kenneth W Cochran :: Sent: Friday, 17 August 2001 10:01 :: To: Kris Kennaway :: Cc: freebsd-stable@freebsd.org :: Subject: Re: New kernel option CPU_ENABLE_SSE :: :: :: Ok, so how can I tell if a given CPU supports that feature? :: :: 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...) :: :: 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? :: :: -kc :: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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