From owner-freebsd-alpha Tue Mar 18 12: 0: 9 2003 Delivered-To: freebsd-alpha@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 15E2C37B401 for ; Tue, 18 Mar 2003 12:00:08 -0800 (PST) Received: from alcanet.com.au (mail2.alcanet.com.au [203.62.196.17]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5681643F75 for ; Tue, 18 Mar 2003 12:00:06 -0800 (PST) (envelope-from peter.jeremy@alcatel.com.au) Received: from sydsmtp01.alcatel.com.au (IDENT:root@localhost.localdomain [127.0.0.1]) by alcanet.com.au (8.12.4/8.12.4/Alcanet1.3) with ESMTP id h2IJxqFx031146; Wed, 19 Mar 2003 06:59:53 +1100 Received: from gsmx07.alcatel.com.au ([139.188.20.247]) by sydsmtp01.alcatel.com.au (Lotus Domino Release 5.0.11) with ESMTP id 2003031906595139:270985 ; Wed, 19 Mar 2003 06:59:51 +1100 Received: from gsmx07.alcatel.com.au (localhost [127.0.0.1]) by gsmx07.alcatel.com.au (8.12.8/8.12.5) with ESMTP id h2IJxpui089813; Wed, 19 Mar 2003 06:59:51 +1100 (EST) (envelope-from peter.jeremy@alcatel.com.au) Received: (from jeremyp@localhost) by gsmx07.alcatel.com.au (8.12.8/8.12.5/Submit) id h2IJxkDP089812; Wed, 19 Mar 2003 06:59:46 +1100 (EST) (envelope-from peter.jeremy@alcatel.com.au) Date: Wed, 19 Mar 2003 06:59:46 +1100 From: Peter Jeremy To: John Polstra Cc: alpha@FreeBSD.ORG, gallatin@cs.duke.edu Subject: Re: HEADS UP: Don't upgrade your Alphas! Message-ID: <20030318195946.GZ90290@gsmx07.alcatel.com.au> Mail-Followup-To: John Polstra , alpha@FreeBSD.ORG, gallatin@cs.duke.edu References: <20030317161219.GA1429@sunbay.com> <3E76CE0F.8FAA6AE3@mindspring.com> <20030318080132.GB10867@HAL9000.homeunix.com> <15991.9122.826678.673067@grasshopper.cs.duke.edu> <200303181645.h2IGjcuG035185@vashon.polstra.com> Mime-Version: 1.0 In-Reply-To: <200303181645.h2IGjcuG035185@vashon.polstra.com> User-Agent: Mutt/1.4i X-MIMETrack: Itemize by SMTP Server on SYDSMTP01/AlcatelAustralia(Release 5.0.11 |July 24, 2002) at 19/03/2003 06:59:51 AM, Serialize by Router on SYDSMTP01/AlcatelAustralia(Release 5.0.11 |July 24, 2002) at 19/03/2003 06:59:53 AM, Serialize complete at 19/03/2003 06:59:53 AM Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On 2003-Mar-18 08:45:38 -0800, John Polstra wrote: >In article <15991.9122.826678.673067@grasshopper.cs.duke.edu>, >Andrew Gallatin wrote: >> >> FWIW, I think -mieee should be on by default. If anybody cared about >> speed, they'd use the compaq compiler or a P4. > >I agree! The lack of -mieee has nailed me on several occasions. >"Fast but broken" is a lousy default. The Compaq compiler also defaults to not generating IEEE code. For most FP work, the AXP partial IEEE support is "good enough". On older Alpha's, full IEEE compliance is fairly expensive because of the lack of exact FP exceptions. In any case, Seymour Cray made quite a good living pandering to people for whom speed was more important than accuracy :-). Peter To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message