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  #include <math.h>
      19  #include <math_private.h>
      20  #include <math-svid-compat.h>
      21  #include <libm-alias-double.h>
      22  
      23  #if LIBM_SVID_COMPAT && (SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_29) \
      24  			 || defined NO_LONG_DOUBLE \
      25  			 || defined LONG_DOUBLE_COMPAT)
      26  /* wrapper exp */
      27  double
      28  __exp_compat (double x)
      29  {
      30    double z = __ieee754_exp (x);
      31    if (__builtin_expect (!isfinite (z) || z == 0, 0)
      32        && isfinite (x) && _LIB_VERSION != _IEEE_)
      33      return __kernel_standard (x, x, 6 + !!signbit (x));
      34  
      35    return z;
      36  }
      37  # if SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_29)
      38  compat_symbol (libm, __exp_compat, exp, GLIBC_2_0);
      39  # endif
      40  # ifdef NO_LONG_DOUBLE
      41  weak_alias (__exp_compat, expl)
      42  # endif
      43  # ifdef LONG_DOUBLE_COMPAT
      44  /* Work around gas bug "multiple versions for symbol".  */
      45  weak_alias (__exp_compat, __exp_compat_alias)
      46  
      47  LONG_DOUBLE_COMPAT_CHOOSE_libm_expl (
      48    compat_symbol (libm, __exp_compat_alias, expl, FIRST_VERSION_libm_expl), );
      49  # endif
      50  #endif