math/w_expf_compat.c

   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