1 /* Copyright (C) 2011-2016 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 <http://www.gnu.org/licenses/>. */
18
19
20 /*
21 * wrapper exp10(x)
22 */
23
24 #include <math.h>
25 #include "math_private.h"
26
27 double
exp10(double x)28 exp10 (double x)
29 {
30 #if defined(__UCLIBC_HAS_FENV__)
31 double z = __ieee754_exp10 (x);
32 if (__builtin_expect (!isfinite (z) || z == 0, 0)
33 && isfinite (x) && _LIB_VERSION != _IEEE_)
34 /* exp10 overflow (46) if x > 0, underflow (47) if x < 0. */
35 return __kernel_standard (x, x, 46 + !!signbit (x));
36
37 return z;
38 #else
39 return __ieee754_exp10 (x);
40 #endif
41 }
42 libm_hidden_def(exp10)
43 strong_alias (exp10, pow10)
44