libm/w_atanhl.c

   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
  22 #if !defined __NO_LONG_DOUBLE_MATH
  23 /* wrapper atanhl */
  24 long double
  25 atanhl (long double x)
  26 {
  27 # if __UCLIBC_HAS_FENV__
  28   if (__builtin_expect (isgreaterequal (fabsl (x), 1.0L), 0)
  29       && _LIB_VERSION != _IEEE_)
  30     return __kernel_standard_l (x, x,
  31                                 fabsl (x) > 1.0L
  32                                 ? 230           /* atanh(|x|>1) */
  33                                 : 231);         /* atanh(|x|==1) */
  34
  35 # endif /* __UCLIBC_HAS_FENV__ */
  36   return (long double) __ieee754_atanh ((double) x);
  37 }
  38 #endif /* __NO_LONG_DOUBLE_MATH */