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glibc/ports/sysdeps/alpha/fpu/s_isnan.c
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/* Return 1 if argument is a NaN, else 0. | |
Copyright (C) 2007 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library. If not, see | |
<http://www.gnu.org/licenses/>. */ | |
/* Ugly kludge to avoid declarations. */ | |
#define __isnanf not___isnanf | |
#define isnanf not_isnanf | |
#define __GI___isnanf not__GI___isnanf | |
#include <math.h> | |
#include <math_ldbl_opt.h> | |
#undef __isnanf | |
#undef isnanf | |
#undef __GI___isnanf | |
/* The hidden_proto in include/math.h was obscured by the macro hackery. */ | |
__typeof (__isnan) __isnanf; | |
hidden_proto (__isnanf) | |
int | |
__isnan (double x) | |
{ | |
return isunordered (x, x); | |
} | |
hidden_def (__isnan) | |
weak_alias (__isnan, isnan) | |
/* It turns out that the 'double' version will also always work for | |
single-precision. */ | |
strong_alias (__isnan, __isnanf) | |
hidden_def (__isnanf) | |
weak_alias (__isnanf, isnanf) | |
#ifdef NO_LONG_DOUBLE | |
strong_alias (__isnan, __isnanl) | |
weak_alias (__isnan, isnanl) | |
#endif | |
#if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0) | |
compat_symbol (libc, __isnan, __isnanl, GLIBC_2_0); | |
compat_symbol (libc, isnan, isnanl, GLIBC_2_0); | |
#endif |