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 <fenv.h>
20#include <math.h>
21#include <math_private.h>
22
23
24/* wrapper acos */
25double
26__acos (double x)
27{
28 if (__builtin_expect (isgreater (fabs (x), 1.0), 0)
29 && _LIB_VERSION != _IEEE_)
30 {
31 /* acos(|x|>1) */
32 __feraiseexcept (FE_INVALID);
33 return __kernel_standard (x, x, 1);
34 }
35
36 return __ieee754_acos (x);
37}
38weak_alias (__acos, acos)
39#ifdef NO_LONG_DOUBLE
40strong_alias (__acos, __acosl)
41weak_alias (__acos, acosl)
42#endif
43