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bfff8b1b | 1 | /* Copyright (C) 2011-2017 Free Software Foundation, Inc. |
0ac5ae23 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@gmail.com>, 2011. | |
f7eac6eb | 4 | |
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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. | |
f7eac6eb | 14 | |
0ac5ae23 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
f7eac6eb | 18 | |
0ac5ae23 | 19 | #include <fenv.h> |
9d13fb24 | 20 | #include <math.h> |
9277c064 | 21 | #include <math_private.h> |
813378e9 | 22 | #include <math-svid-compat.h> |
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23 | |
24 | ||
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25 | /* wrapper log10(x) */ |
26 | double | |
27 | __log10 (double x) | |
f7eac6eb | 28 | { |
92221550 | 29 | if (__builtin_expect (islessequal (x, 0.0), 0) && _LIB_VERSION != _IEEE_) |
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30 | { |
31 | if (x == 0.0) | |
32 | { | |
0747f818 | 33 | __feraiseexcept (FE_DIVBYZERO); |
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34 | return __kernel_standard (x, x, 18); /* log10(0) */ |
35 | } | |
36 | else | |
37 | { | |
0747f818 | 38 | __feraiseexcept (FE_INVALID); |
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39 | return __kernel_standard (x, x, 19); /* log10(x<0) */ |
40 | } | |
41 | } | |
42 | ||
43 | return __ieee754_log10 (x); | |
f7eac6eb RM |
44 | } |
45 | weak_alias (__log10, log10) | |
cccda09f UD |
46 | #ifdef NO_LONG_DOUBLE |
47 | strong_alias (__log10, __log10l) | |
1f64ac13 | 48 | weak_alias (__log10, log10l) |
cccda09f | 49 | #endif |