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 */
27double
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)
38compat_symbol (libm, __exp_compat, exp, GLIBC_2_0);
39# endif
40# ifdef NO_LONG_DOUBLE
41weak_alias (__exp_compat, expl)
42# endif
43# ifdef LONG_DOUBLE_COMPAT
44/* Work around gas bug "multiple versions for symbol". */
45weak_alias (__exp_compat, __exp_compat_alias)
46
47LONG_DOUBLE_COMPAT_CHOOSE_libm_expl (
48 compat_symbol (libm, __exp_compat_alias, expl, FIRST_VERSION_libm_expl), );
49# endif
50#endif
51