math/w_asin.c

   1 /* Copyright (C) 2011 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 asin */
  25 double
  26 __asin (double x)
  27 {
  28   if (__builtin_expect (fabs (x) > 1.0, 0) && _LIB_VERSION != _IEEE_)
  29     {
  30       /* asin(|x|>1) */
  31       feraiseexcept (FE_INVALID);
  32       return __kernel_standard (x, x, 2);
  33     }
  34
  35   return __ieee754_asin (x);
  36 }
  37 weak_alias (__asin, asin)
  38 #ifdef NO_LONG_DOUBLE
  39 strong_alias (__asin, __asinl)
  40 weak_alias (__asin, asinl)
  41 #endif