Date: Wed, 3 Mar 1999 20:44:55 +1100 (EDT) From: Andrew MacIntyre <andymac@bullseye.apana.org.au> To: cjclark@home.com Cc: FreeBSD Questions <freebsd-questions@FreeBSD.ORG> Subject: Re: FP Math Message-ID: <Pine.OS2.3.95.990303202655.289B-100000@CENTRAL> In-Reply-To: <199903021703.MAA02135@cc942873-a.ewndsr1.nj.home.com>
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On Tue, 2 Mar 1999, Crist J. Clark wrote:
> I have been having some trouble with floating point
> operations, namely the dreaded,
>
> Floating exception (core dumped)
>
> Having a look at 'man math' only really served to confuse me more. The
I recall a thread some time ago where a number of related issues were
canvassed.
Notwithstanding Greg Black's comments on what happens with "undefined"
parts of the C standard, I think the basis of your difficulty has to do
with the fact that FreeBSD's math library has traditionally operated with
all exceptions unmasked, whereas many other platforms have defaulted to
masking certain FP exceptions, at least in some circumstances.
I suggest you man fpsetmask for more info.
I also note from another message in this thread 2.2.8 behaves differently
than 2.2.7 and earlier - the default FP mask may have been changed to
match the default apparently used by other contemporary OSes.
--
Andrew I MacIntyre "These thoughts are mine alone..."
E-mail: andrew.macintyre@aba.gov.au (work) | Snail: PO Box 370
andymac@bullseye.apana.org.au (play) | Belconnen ACT 2616
Fido: Andrew MacIntyre, 3:620/243.18 | Australia
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