From owner-freebsd-current Sat Oct 27 14:24:14 2001 Delivered-To: freebsd-current@freebsd.org Received: from femail37.sdc1.sfba.home.com (femail37.sdc1.sfba.home.com [24.254.60.31]) by hub.freebsd.org (Postfix) with ESMTP id F020C37B403; Sat, 27 Oct 2001 14:24:10 -0700 (PDT) Received: from ci989678-a.pop.uky.edu ([65.8.167.122]) by femail37.sdc1.sfba.home.com (InterMail vM.4.01.03.20 201-229-121-120-20010223) with ESMTP id <20011027212409.ITJX14145.femail37.sdc1.sfba.home.com@ci989678-a.pop.uky.edu>; Sat, 27 Oct 2001 14:24:09 -0700 Message-Id: <5.1.0.14.2.20011027170901.00a55c50@pop.uky.edu> X-Sender: gchil0@pop.uky.edu X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Sat, 27 Oct 2001 17:24:14 -0400 To: freebsd-stable , freebsd-current From: Greg Childers Subject: Re: adding athlon xp to bsd.cpu.mk In-Reply-To: <20011027204403.D6A8639F0@overcee.netplex.com.au> References: <20011027162313.A91463@nomad.thehutt.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG > > Shouldn't Athlons and AthlonXPs be able to use i686 (pentiumpro) > > instruction set optimizations? > >No. They are different cpu cores that have different optimization >strategies. Yes, all Athlons can use i686 code while the k6's can't. Further, without doing any scientific testing, I would think the Athlon would do better with ppro optimized code than k6 optimized code thanks to the available i686 instructions. When GCC 3.0 is used, tho, this won't be an issue since it supports optimizations for the Athlon. Greg To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message