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.
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.
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.
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/>. */
21 #include <math_private.h>
22 #include <math-svid-compat.h>
23 #include <libm-alias-double.h>
27 /* wrapper log10(x) */
31 if (__builtin_expect (islessequal (x, 0.0), 0) && _LIB_VERSION != _IEEE_)
35 __feraiseexcept (FE_DIVBYZERO);
36 return __kernel_standard (x, x, 18); /* log10(0) */
40 __feraiseexcept (FE_INVALID);
41 return __kernel_standard (x, x, 19); /* log10(x<0) */
45 return __ieee754_log10 (x);
47 libm_alias_double (__log10, log10)