From owner-freebsd-questions Mon Nov 1 17:28:44 1999 Delivered-To: freebsd-questions@freebsd.org Received: from dorifer.heim3.tu-clausthal.de (dorifer.heim3.tu-clausthal.de [139.174.243.252]) by hub.freebsd.org (Postfix) with ESMTP id E351914C4A for ; Mon, 1 Nov 1999 17:28:41 -0800 (PST) (envelope-from olli@dorifer.heim3.tu-clausthal.de) Received: (from olli@localhost) by dorifer.heim3.tu-clausthal.de (8.8.8/8.8.8) id CAA26722 for freebsd-questions@FreeBSD.ORG; Tue, 2 Nov 1999 02:28:40 +0100 (CET) (envelope-from olli) Date: Tue, 2 Nov 1999 02:28:40 +0100 (CET) From: Oliver Fromme Message-Id: <199911020128.CAA26722@dorifer.heim3.tu-clausthal.de> To: freebsd-questions@FreeBSD.ORG Subject: Re: Athlons.. Organization: Administration Heim 3 Reply-To: freebsd-questions@FreeBSD.ORG MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Newsreader: TIN [version 1.2 RZTUC(3) PL2] Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG 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. 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