1 /* Copyright (C) 2011-2016 Free Software Foundation, Inc.
2    This file is part of the GNU C Library.
3    Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
4 
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.
9 
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.
14 
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/>.  */
18 
19 #include <math.h>
20 #include "math_private.h"
21 #if defined(__UCLIBC_HAS_FENV__)
22 #include <fenv.h>
23 #endif
24 /* wrapper acosf */
25 float
acosf(float x)26 acosf (float x)
27 {
28 #if defined(__UCLIBC_HAS_FENV__)
29   if (__builtin_expect (isgreater (fabsf (x), 1.0f), 0)
30       && _LIB_VERSION != _IEEE_)
31     {
32       /* acos(|x|>1) */
33       feraiseexcept (FE_INVALID);
34       return __kernel_standard_f (x, x, 101);
35     }
36 #endif
37   return (float) __ieee754_acos ((float) x);
38 }
39