From owner-freebsd-stable Thu Aug 16 15: 3:45 2001 Delivered-To: freebsd-stable@freebsd.org Received: from vimfuego.saarinen.org (saarinen.org [203.79.82.14]) by hub.freebsd.org (Postfix) with ESMTP id 94E2637B401 for ; Thu, 16 Aug 2001 15:03:41 -0700 (PDT) (envelope-from juha@saarinen.org) Received: from [192.168.1.10] (helo=den2) by vimfuego.saarinen.org with esmtp (Exim 3.22 #1 (Red Hack)) id 15XVEq-0007cO-00; Fri, 17 Aug 2001 10:03:40 +1200 From: "Juha Saarinen" To: "'Kenneth W Cochran'" , "'Kris Kennaway'" Cc: Subject: RE: New kernel option CPU_ENABLE_SSE Date: Fri, 17 Aug 2001 10:03:41 +1200 Message-ID: <01ef01c1269f$4f5635b0$0a01a8c0@den2> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2627 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 In-Reply-To: <200108162200.SAA21031@world.std.com> Importance: Normal Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG 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