From: Andreas Schwab <schwab@suse.de>
Cc: Luc Teirlinck <teirllm@dms.auburn.edu>, emacs-devel@gnu.org
Subject: Re: (elisp)Numbers
Date: Wed, 22 Oct 2003 13:36:59 +0200 [thread overview]
Message-ID: <jellrdpkpw.fsf@sykes.suse.de> (raw)
In-Reply-To: <E1ACFFJ-0004gJ-6Y@fencepost.gnu.org> (Richard Stallman's message of "Wed, 22 Oct 2003 05:25:37 -0400")
Richard Stallman <rms@gnu.org> writes:
> 2. In (elisp)Math Functions, it is said that asin, acos, log, log10
> and sqrt all return NaN values for out-of-range arguments, but, on
> my machine, only `sqrt' does. The others throw an error, see the
> IELM run below.
>
> I get the same results. I figured out why. I'm using an x86. Facos
> calls acos, but in Fsqrt the call to sqrt gets open-coded using the
> fsqrt instruction. fsqrt doesn't set errno as it is expected to.
> Perhaps that is a GCC bug.
GCC does not fully support C99 yet.
According to C99 a domain error results in an implementation-defined
value, and if math_errhandling & MATH_ERRNO is non-zero, errno is set
appropriately.
Andreas.
--
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux AG, Deutschherrnstr. 15-19, D-90429 Nürnberg
Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
next prev parent reply other threads:[~2003-10-22 11:36 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-21 2:29 (elisp)Numbers Luc Teirlinck
2003-10-21 5:38 ` (elisp)Numbers Eli Zaretskii
2003-10-22 9:26 ` (elisp)Numbers Richard Stallman
2003-10-22 15:51 ` (elisp)Numbers Eli Zaretskii
2003-10-22 9:25 ` (elisp)Numbers Richard Stallman
2003-10-22 11:36 ` Andreas Schwab [this message]
2003-10-22 15:42 ` (elisp)Numbers Eli Zaretskii
2003-10-23 18:38 ` (elisp)Numbers Richard Stallman
2003-10-24 8:43 ` (elisp)Numbers Andreas Schwab
2003-10-24 13:50 ` (elisp)Numbers Eli Zaretskii
2003-10-24 22:15 ` (elisp)Numbers Eli Zaretskii
2003-10-25 22:26 ` (elisp)Numbers Richard Stallman
2003-10-26 6:04 ` (elisp)Numbers Eli Zaretskii
2003-10-27 7:02 ` (elisp)Numbers Richard Stallman
2003-10-27 19:56 ` (elisp)Numbers Eli Zaretskii
2003-10-27 21:46 ` (elisp)Numbers Andreas Schwab
2003-10-28 5:48 ` (elisp)Numbers Eli Zaretskii
2003-10-28 6:40 ` (elisp)Numbers Lars Brinkhoff
2003-10-28 20:03 ` (elisp)Numbers Eli Zaretskii
2003-10-28 20:40 ` (elisp)Numbers Richard Stallman
2003-10-24 13:38 ` (elisp)Numbers Eli Zaretskii
2003-10-24 22:04 ` (elisp)Numbers Eli Zaretskii
-- strict thread matches above, loose matches on Subject: below --
2003-10-04 15:36 (elisp)Numbers Luc Teirlinck
2003-10-07 19:57 ` (elisp)Numbers Eli Zaretskii
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