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| author | Bruno Haible <bruno@clisp.org> | 2008-01-26 15:45:42 +0100 |
|---|---|---|
| committer | Bruno Haible <bruno@clisp.org> | 2008-01-26 15:45:42 +0100 |
| commit | 814389d96bd728c18fa658ae2ebb2ac72edd587a (patch) | |
| tree | d58f080266e719fa528f8fc455c92b1c0d6117c1 /lib/isnanl.h | |
| parent | 3e4b5182b4adda8d229d96e307a44a75eda086d3 (diff) | |
| download | gnulib-814389d96bd728c18fa658ae2ebb2ac72edd587a.tar.gz | |
Use the GCC built-in __builtin_isnanl (if it works).
Diffstat (limited to 'lib/isnanl.h')
| -rw-r--r-- | lib/isnanl.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/isnanl.h b/lib/isnanl.h index a79b040d58..36a733f9d2 100644 --- a/lib/isnanl.h +++ b/lib/isnanl.h @@ -1,5 +1,5 @@ /* Test for NaN. - Copyright (C) 2007 Free Software Foundation, Inc. + Copyright (C) 2007-2008 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -17,7 +17,11 @@ #if HAVE_ISNANL /* Get declaration of isnan macro or (older) isnanl function. */ # include <math.h> -# ifdef isnan +# if __GNUC__ >= 4 + /* GCC 4.0 and newer provides three built-ins for isnan. */ +# undef isnanl +# define isnanl(x) __builtin_isnanl ((long double)(x)) +# elif defined isnan # undef isnanl # define isnanl(x) isnan ((long double)(x)) # endif |