1 /* Return 1 if argument is a NaN, else 0.
2 Copyright (C) 1997-2018 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 __Xisnanf
21 #define isnanf Xisnanf
22 #define __GI___isnanf __GI___Xisnanf
25 #include <math_ldbl_opt.h>
26 #include <fenv_libc.h>
33 /* The hidden_proto in include/math.h was obscured by the macro hackery. */
34 __typeof (__isnan
) __isnanf
;
35 hidden_proto (__isnanf
)
43 savedstate
= fegetenv_register ();
44 reset_fpscr_bit (FPSCR_VE
);
46 fesetenv_register (savedstate
);
50 weak_alias (__isnan
, isnan
)
53 /* It turns out that the 'double' version will also always work for
55 strong_alias (__isnan
, __isnanf
)
57 weak_alias (__isnanf
, isnanf
)
60 strong_alias (__isnan
, __isnanl
)
61 weak_alias (__isnan
, isnanl
)