Date: Wed, 19 Mar 2003 06:59:46 +1100 From: Peter Jeremy <peter.jeremy@alcatel.com.au> To: John Polstra <jdp@polstra.com> 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> In-Reply-To: <200303181645.h2IGjcuG035185@vashon.polstra.com> 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>
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On 2003-Mar-18 08:45:38 -0800, John Polstra <jdp@polstra.com> wrote: >In article <15991.9122.826678.673067@grasshopper.cs.duke.edu>, >Andrew Gallatin <gallatin@cs.duke.edu> 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
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