1  /* Copyright (C) 2011-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  
      19  /*
      20   * wrapper exp10(x)
      21   */
      22  
      23  #include <math.h>
      24  #include <math_private.h>
      25  #include <math-svid-compat.h>
      26  #include <libm-alias-double.h>
      27  
      28  #if LIBM_SVID_COMPAT
      29  double
      30  __exp10 (double x)
      31  {
      32    double z = __ieee754_exp10 (x);
      33    if (__builtin_expect (!isfinite (z) || z == 0, 0)
      34        && isfinite (x) && _LIB_VERSION != _IEEE_)
      35      /* exp10 overflow (46) if x > 0, underflow (47) if x < 0.  */
      36      return __kernel_standard (x, x, 46 + !!signbit (x));
      37  
      38    return z;
      39  }
      40  libm_alias_double (__exp10, exp10)
      41  # if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_27)
      42  strong_alias (__exp10, __pow10)
      43  compat_symbol (libm, __pow10, pow10, GLIBC_2_1);
      44  # endif
      45  # ifdef NO_LONG_DOUBLE
      46  #  if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_27)
      47  strong_alias (__exp10l, __pow10l)
      48  compat_symbol (libm, __pow10l, pow10l, GLIBC_2_1);
      49  #  endif
      50  # endif
      51  #endif