From: Andreas Schwab <schwab@suse.de>
Cc: emacs-devel@gnu.org
Subject: Re: sqrt with negative arg.
Date: Thu, 01 Jan 2004 18:22:22 +0100 [thread overview]
Message-ID: <m3n09737ox.fsf@whitebox.m5r.de> (raw)
In-Reply-To: <200312312136.hBVLaVd00009@raven.dms.auburn.edu> (Luc Teirlinck's message of "Wed, 31 Dec 2003 15:36:31 -0600 (CST)")
Luc Teirlinck <teirllm@dms.auburn.edu> writes:
> A few hours ago, the documentation of sqrt in numbers.texi was
> changed from saying that it returns a NaN to saying that it signals a
> domain-error. It definitely returns a NaN on my machine.
This is a bug either in sqrt or in matherr on your system. ISO C
requires that a domain error occurs when sqrt is called with a
negative argument, and Emacs depends on matherr (when it is supported)
to be called. Apparently, the availability of matherr is not enough
to guarantee this.
Andreas.
--
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux AG, Maxfeldstraße 5, 90409 Nürnberg, Germany
Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
next prev parent reply other threads:[~2004-01-01 17:22 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-31 21:36 sqrt with negative arg Luc Teirlinck
2004-01-01 6:24 ` Eli Zaretskii
2004-01-01 16:30 ` Richard Stallman
2004-01-01 16:42 ` Luc Teirlinck
2004-01-01 17:22 ` Andreas Schwab [this message]
2004-01-02 9:27 ` Eli Zaretskii
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