math/e_exp10f.c

   1 /* Copyright (C) 1998-2018 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
   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
  23 float
  24 __ieee754_exp10f (float arg)
  25 {
  26   /* The argument to exp needs to be calculated in enough precision
  27      that the fractional part has as much precision as float, in
  28      addition to the bits in the integer part; using double ensures
  29      this.  */
  30   return __ieee754_exp (M_LN10 * arg);
  31 }
  32 strong_alias (__ieee754_exp10f, __exp10f_finite)