Date: Fri, 16 Jul 1999 09:45:35 +0100 (BST) From: Doug Rabson <dfr@nlsystems.com> To: John Polstra <jdp@polstra.com> Cc: alpha@freebsd.org, simokawa@sat.t.u-tokyo.ac.jp Subject: Re: alpha/12623: strtod(3) FPE on alphaev56 Message-ID: <Pine.BSF.4.10.9907160944230.58023-100000@salmon.nlsystems.com> In-Reply-To: <XFMail.990715215415.jdp@polstra.com>
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On Thu, 15 Jul 1999, John Polstra wrote: > Doug Rabson wrote: > > On Tue, 13 Jul 1999, John Polstra wrote: > > > >> Yes, or the equivalent "-mieee". In my opinion, all of the libraries > >> (if not the whole world) should be compiled that way. In fact, this > >> option should be the default. Users who wanted a little extra speed > >> and who knew what they are doing could turn it off. > > > > I agree (at least as far as the libraries go). Setting it as default would > > be easy but there are performance implications. On the other hand, the > > only applications whose performance is affected are ones using floating > > point.. > > Yes, I think "correct by default" would be more in keeping with the > FreeBSD tradition than "fast but possibly wrong by default". So I > still think -mieee should be used for everything. > > My only real concern about making it the compiler default is that it > causes us to deviate from standard egcs a little bit more. But the > deviation would be confined to "egcs/config/alpha/freebsd.h", which is > probably OK. I think we should add a "-mno-ieee" option to disable > it, too. That's not hard. I agree. As long as there is a -mno-ieee option for those programs which need to squeeze the last drop of performance then this is the right thing to do. -- Doug Rabson Mail: dfr@nlsystems.com Nonlinear Systems Ltd. Phone: +44 181 442 9037 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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