From owner-freebsd-current Fri Oct 22 8:10:26 1999 Delivered-To: freebsd-current@freebsd.org Received: from dan.emsphone.com (dan.emsphone.com [199.67.51.101]) by hub.freebsd.org (Postfix) with ESMTP id 0805B15023 for ; Fri, 22 Oct 1999 08:10:18 -0700 (PDT) (envelope-from dan@dan.emsphone.com) Received: (from dan@localhost) by dan.emsphone.com (8.9.3/8.9.3) id JAA16956; Fri, 22 Oct 1999 09:57:59 -0500 (CDT) (envelope-from dan) Date: Fri, 22 Oct 1999 09:57:59 -0500 From: Dan Nelson To: Stephen Roome Cc: Ville-Pertti Keinonen , current@FreeBSD.ORG Subject: Re: Anyone adding "support" for Athlons. Message-ID: <19991022095759.A16787@dan.emsphone.com> References: <86zoxd19yl.fsf@not.demophon.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0pre4i In-Reply-To: ; from steveroo@mothra.bri.hp.com on Fri, Oct 22, 1999 at 12:00:05PM +0100 X-OS: FreeBSD 4.0-CURRENT Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG In the last episode (Oct 22), Stephen Roome said: > The issues I was trying to raise were really about better > optimization for Athlons, and later generations of CPU's, as follows Optimization issues should be brought up on the egcs mailinglists, since that is the compiler we use. > 2) Alignment. By default if code is compiled without -m486 we end up > with different alignment strategies taken by gcc. Should the 386 > strategy still be the default ? (i.e. Should 386 still be considered > the expected hardware for FreeBSD) yes. Edit /etc/make.conf and add -march=i586 if you want to compile your machine with pentium-specific code. > 3) Use of SIMD instructions, (MMX and 3DNow!). Are these used by > anything ? Don't the MMX instructions stomp on the floating-point regs? -- Dan Nelson dnelson@emsphone.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message