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  
      22  #if LIBM_SVID_COMPAT && SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_27)
      23  /* wrapper expf */
      24  float
      25  __expf_compat (float x)
      26  {
      27    float z = __ieee754_expf (x);
      28    if (__builtin_expect (!isfinite (z) || z == 0, 0)
      29        && isfinite (x) && _LIB_VERSION != _IEEE_)
      30      return __kernel_standard_f (x, x, 106 + !!signbit (x));
      31  
      32    return z;
      33  }
      34  compat_symbol (libm, __expf_compat, expf, GLIBC_2_0);
      35  #endif