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 20 #include <math.h> 21 #include "math_private.h" 22 #if defined(__UCLIBC_HAS_FENV__) 23 #include <fenv.h> 24 #endif 25 26 #if !defined __NO_LONG_DOUBLE_MATH 27 /* wrapper acosl */ 28 long double acosl(long double x)29acosl (long double x) 30 { 31 #if defined(__UCLIBC_HAS_FENV__) 32 if (__builtin_expect (isgreater (fabsl (x), 1.0L), 0) 33 && _LIB_VERSION != _IEEE_) 34 { 35 /* acos(|x|>1) */ 36 feraiseexcept (FE_INVALID); 37 return __kernel_standard_l (x, x, 201); 38 } 39 #endif 40 return (long double) __ieee754_acos ((double) x); 41 } 42 #endif 43