1 /* Copyright (C) 2011-2022 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
19 /*
20 * wrapper exp10(x)
21 */
22
23 #include <math.h>
24 #include <math_private.h>
25 #include <math-svid-compat.h>
26 #include <libm-alias-double.h>
27
28 #if LIBM_SVID_COMPAT
29 double
__exp10(double x)30 __exp10 (double x)
31 {
32 double z = __ieee754_exp10 (x);
33 if (__builtin_expect (!isfinite (z) || z == 0, 0)
34 && isfinite (x) && _LIB_VERSION != _IEEE_)
35 /* exp10 overflow (46) if x > 0, underflow (47) if x < 0. */
36 return __kernel_standard (x, x, 46 + !!signbit (x));
37
38 return z;
39 }
40 libm_alias_double (__exp10, exp10)
41 # if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_27)
42 strong_alias (__exp10, __pow10)
43 compat_symbol (libm, __pow10, pow10, GLIBC_2_1);
44 # endif
45 # ifdef NO_LONG_DOUBLE
46 # if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_27)
47 strong_alias (__exp10l, __pow10l)
48 compat_symbol (libm, __pow10l, pow10l, GLIBC_2_1);
49 # endif
50 # endif
51 #endif
52