1/* Copyright (C) 2011-2020 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <math.h>
20#include <math_private.h>
21#include <math-svid-compat.h>
22#include <libm-alias-double.h>
23
24#if LIBM_SVID_COMPAT && (SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_29) \
25 || defined NO_LONG_DOUBLE \
26 || defined LONG_DOUBLE_COMPAT)
27/* wrapper exp */
28double
29__exp_compat (double x)
30{
31 double z = __ieee754_exp (x);
32 if (__builtin_expect (!isfinite (z) || z == 0, 0)
33 && isfinite (x) && _LIB_VERSION != _IEEE_)
34 return __kernel_standard (x, x, 6 + !!signbit (x));
35
36 return z;
37}
38# if SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_29)
39compat_symbol (libm, __exp_compat, exp, GLIBC_2_0);
40# endif
41# ifdef NO_LONG_DOUBLE
42weak_alias (__exp_compat, expl)
43# endif
44# ifdef LONG_DOUBLE_COMPAT
45/* Work around gas bug "multiple versions for symbol". */
46weak_alias (__exp_compat, __exp_compat_alias)
47
48LONG_DOUBLE_COMPAT_CHOOSE_libm_expl (
49 compat_symbol (libm, __exp_compat_alias, expl, FIRST_VERSION_libm_expl), );
50# endif
51#endif
52