From: "Eli Zaretskii" <eliz@elta.co.il>
Cc: emacs-devel@gnu.org
Subject: Re: (elisp)Numbers
Date: Tue, 21 Oct 2003 07:38:56 +0200 [thread overview]
Message-ID: <2719-Tue21Oct2003073855+0200-eliz@elta.co.il> (raw)
In-Reply-To: <200310210229.h9L2TGl12085@raven.dms.auburn.edu> (message from Luc Teirlinck on Mon, 20 Oct 2003 21:29:16 -0500 (CDT))
> Date: Mon, 20 Oct 2003 21:29:16 -0500 (CDT)
> From: Luc Teirlinck <teirllm@dms.auburn.edu>
>
> 1. In (elisp)Numeric Conversions, is it worth pointing out that not
> only `floor', but also `truncate', `ceiling' and `round' take an
> optional DIVISOR argument?
IMHO, yes.
> 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. Is this machine dependent?
Yes, see the commentary at the beginning of src/floatfns.c, in
particular the HAVE_MATHERR and the various FLOAT_CHECK_* macros. The
bottom line is that the details depend on the specific implementation
of handling abnormal arguments by the system libraries. (Btw, I
expect the bahavior we see today to change over the next years, as C9x
propagates with its new requirements about FP exceptions.)
next prev parent reply other threads:[~2003-10-21 5:38 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 ` Eli Zaretskii [this message]
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 ` (elisp)Numbers Andreas Schwab
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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