benchtests: Add exp10f benchmark

[thirdparty/glibc.git] / math / e_exp10f.c

/* Copyright (C) 1998-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#include <math.h>
#include <math_private.h>
#include <libm-alias-finite.h>

float
__ieee754_exp10f (float arg)
{
  /* The argument to exp needs to be calculated in enough precision
     that the fractional part has as much precision as float, in
     addition to the bits in the integer part; using double ensures
     this.  */
  return __ieee754_exp (M_LN10 * arg);
}
libm_alias_finite (__ieee754_exp10f, __exp10f)