math/w_exp10.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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20
  21 /*
  22  * wrapper exp10(x)
  23  */
  24
  25 #include <math.h>
  26 #include <math_private.h>
  27
  28 double
  29 __exp10 (double x)
  30 {
  31   double z = __ieee754_exp10 (x);
  32   if (__builtin_expect (!__finite (z), 0)
  33       && __finite (x) && _LIB_VERSION != _IEEE_)
  34     /* exp10 overflow (46) if x > 0, underflow (47) if x < 0.  */
  35     return __kernel_standard (x, x, 46 + !!__signbit (x));
  36
  37   return z;
  38 }
  39 weak_alias (__exp10, exp10)
  40 strong_alias (__exp10, __pow10)
  41 weak_alias (__pow10, pow10)
  42 #ifdef NO_LONG_DOUBLE
  43 strong_alias (__exp10, __exp10l)
  44 weak_alias (__exp10, exp10l)
  45 strong_alias (__exp10l, __pow10l)
  46 weak_alias (__pow10l, pow10l)
  47 #endif