From owner-freebsd-hackers Fri May 7 15: 8:56 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from m4.c2.telstra-mm.net.au (m4.c2.telstra-mm.net.au [24.192.3.19]) by hub.freebsd.org (Postfix) with ESMTP id 4C3FD14C35 for ; Fri, 7 May 1999 15:08:46 -0700 (PDT) (envelope-from andrew@lake.com.au) Received: from m5.c2.telstra-mm.net.au (m5.c2.telstra-mm.net.au [24.192.3.20]) by m4.c2.telstra-mm.net.au (8.8.6 (PHNE_14041)/8.8.6) with ESMTP id IAA25584 for ; Sat, 8 May 1999 08:08:43 +1000 (EST) X-BPC-Relay-Envelope-From: andrew@lake.com.au X-BPC-Relay-Envelope-To: X-BPC-Relay-Sender-Host: m5.c2.telstra-mm.net.au [24.192.3.20] X-BPC-Relay-Info: Message delivered directly. Received: from areilly.bpc-users.org (CPE-24-192-51-95.nsw.bigpond.net.au [24.192.51.95]) by m5.c2.telstra-mm.net.au (8.8.6 (PHNE_14041)/8.8.6) with SMTP id IAA27762 for ; Sat, 8 May 1999 08:08:42 +1000 (EST) Received: (qmail 11528 invoked by uid 1000); 7 May 1999 22:08:42 -0000 From: "Andrew Reilly" Date: Sat, 8 May 1999 08:08:42 +1000 To: Zach Brown Cc: Matthew Dillon , Andrew Reilly , freebsd-hackers@FreeBSD.ORG Subject: Re: Pentium-III and FreeBSD? Message-ID: <19990508080842.A11385@gurney.reilly.home> References: <199905070056.RAA39946@apollo.backplane.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.95.4i In-Reply-To: ; from Zach Brown on Fri, May 07, 1999 at 11:15:53AM -0400 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Fri, May 07, 1999 at 11:15:53AM -0400, Zach Brown wrote: > > In regards to FP: The best place for extreme FP optimization is in > > a high level FP library, not in native compiler-produced code. The > > yes. That's pretty much all I really want to do, but the catch with the P-III is that the new SIMD registers do _not_ map over the fp registers, the way MMX did. They are new processor state. So we need OS support to save and restore them on context switches. Intel supplies a "patch" for NT that does this, appently. Should be an interesting introduction to the bottom levels of the kernel. -- Andrew To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message