sysdeps/ieee754/ldbl-96/w_expl.c

   1 /* Copyright (C) 2011, 2012 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 static const long double
  23 o_threshold=  1.135652340629414394949193107797076489134e4,
  24   /* 0x400C, 0xB17217F7, 0xD1CF79AC */
  25 u_threshold= -1.140019167866942050398521670162263001513e4;
  26   /* 0x400C, 0xB220C447, 0x69C201E8 */
  27
  28
  29 /* wrapper expl */
  30 long double
  31 __expl (long double x)
  32 {
  33   if (__builtin_expect (isgreater (x, o_threshold), 0))
  34     {
  35       if (_LIB_VERSION != _IEEE_)
  36         return __kernel_standard (x, x, 206);
  37     }
  38   else if (__builtin_expect (isless (x, u_threshold), 0))
  39     {
  40       if (_LIB_VERSION != _IEEE_)
  41         return __kernel_standard (x, x, 207);
  42     }
  43
  44   return __ieee754_expl (x);
  45 }
  46 hidden_def (__expl)
  47 weak_alias (__expl, expl)