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git.ipfire.org Git - thirdparty/glibc.git/blob - sysdeps/alpha/fpu/s_isnan.c
1 /* Return 1 if argument is a NaN, else 0.
2 Copyright (C) 2007-2014 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library. If not, see
17 <http://www.gnu.org/licenses/>. */
19 /* Ugly kludge to avoid declarations. */
20 #define __isnanf not___isnanf
21 #define isnanf not_isnanf
22 #define __GI___isnanf not__GI___isnanf
25 #include <math_ldbl_opt.h>
35 EXTRACT_WORDS64 (ix
, x
);
36 return ix
* 2 > 0xffe0000000000000ul
;
40 weak_alias (__isnan
, isnan
)
42 /* It turns out that the 'double' version will also always work for
44 strong_alias (__isnan
, __isnanf
)
45 weak_alias (__isnan
, isnanf
)
47 /* ??? GCC 4.8 fails to look through chains of aliases with asm names
48 attached. Work around this for now. */
49 hidden_ver (__isnan
, __isnanf
)
52 strong_alias (__isnan
, __isnanl
)
53 weak_alias (__isnan
, isnanl
)
55 #if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
56 compat_symbol (libc
, __isnan
, __isnanl
, GLIBC_2_0
);
57 compat_symbol (libc
, isnan
, isnanl
, GLIBC_2_0
);