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bfff8b1b | 1 | /* Copyright (C) 2011-2017 Free Software Foundation, Inc. |
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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. | |
f7eac6eb | 9 | |
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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 |
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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 | ||
4f3647e4 | 25 | #if LIBM_SVID_COMPAT |
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26 | /* wrapper logf(x) */ |
27 | float | |
28 | __logf (float x) | |
f7eac6eb | 29 | { |
92221550 | 30 | if (__builtin_expect (islessequal (x, 0.0f), 0) && _LIB_VERSION != _IEEE_) |
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31 | { |
32 | if (x == 0.0f) | |
33 | { | |
34 | feraiseexcept (FE_DIVBYZERO); | |
35 | return __kernel_standard_f (x, x, 116); /* log(0) */ | |
36 | } | |
37 | else | |
38 | { | |
39 | feraiseexcept (FE_INVALID); | |
40 | return __kernel_standard_f (x, x, 117); /* log(x<0) */ | |
41 | } | |
42 | } | |
43 | ||
44 | return __ieee754_logf (x); | |
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45 | } |
46 | weak_alias (__logf, logf) | |
4f3647e4 | 47 | #endif |