From owner-freebsd-questions Tue Nov 2 10:10:11 1999 Delivered-To: freebsd-questions@freebsd.org Received: from monsoon.mail.pipex.net (monsoon.mail.pipex.net [158.43.128.69]) by hub.freebsd.org (Postfix) with SMTP id DC6EA154A4 for ; Tue, 2 Nov 1999 10:10:03 -0800 (PST) (envelope-from mark@dogma.freebsd-uk.eu.org) Received: (qmail 16241 invoked from network); 2 Nov 1999 18:10:01 -0000 Received: from userbl27.uk.uudial.com (HELO marder-1.) (62.188.144.134) by smtp.dial.pipex.com with SMTP; 2 Nov 1999 18:10:01 -0000 Received: (from mark@localhost) by marder-1. (8.9.3/8.8.8) id SAA00863 for freebsd-questions@freebsd.org; Tue, 2 Nov 1999 18:10:00 GMT (envelope-from mark) Date: Tue, 2 Nov 1999 18:09:59 +0000 From: Mark Ovens To: freebsd-questions@freebsd.org Subject: Re: Athlons.. Message-ID: <19991102180959.B317@marder-1> References: <199911020128.CAA26722@dorifer.heim3.tu-clausthal.de> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Mailer: Mutt 1.0pre2i In-Reply-To: <199911020128.CAA26722@dorifer.heim3.tu-clausthal.de> Organization: Total lack of Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Tue, Nov 02, 1999 at 02:28:40AM +0100, Oliver Fromme wrote: > Stephen Roome wrote in list.freebsd-questions: > > Does anyone know if the following example, taken from AMD's documentation, > > would improve bcopy performance on the Athlon? (over the routine that would be > > defaulted to ?) > > This _might_ improve performance when copying very large > regions. However, the problem is, that movq (which is an > MMX instruction) clobbers the FPU registers, which is a > bad thing. > ISTR reading that this is an Intel-only problem and that AMD's 3D-Now! instructions don't clobber the FPU registers. Can't remember the reason though, dedicated registers? > Regards > Oliver > > -- > Oliver Fromme, Leibnizstr. 18/61, 38678 Clausthal, Germany > (Info: finger userinfo:olli@dorifer.heim3.tu-clausthal.de) > > "In jedem Stück Kohle wartet ein Diamant auf seine Geburt" > (Terry Pratchett) > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message -- STATE-OF-THE-ART: Any computer you can't afford. OBSOLETE: Any computer you own. ________________________________________________________________ FreeBSD - The Power To Serve http://www.freebsd.org My Webpage http://ukug.uk.freebsd.org/~mark/ mailto:mark@ukug.uk.freebsd.org http://www.radan.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message