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688903eb | 1 | /* Copyright (C) 2011-2018 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 | |
0ac5ae23 UD |
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> |
9ac44708 | 23 | #include <libm-alias-double.h> |
f7eac6eb RM |
24 | |
25 | ||
f29b7c49 SN |
26 | #if LIBM_SVID_COMPAT && (SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_29) \ |
27 | || defined NO_LONG_DOUBLE \ | |
28 | || defined LONG_DOUBLE_COMPAT) | |
0ac5ae23 UD |
29 | /* wrapper log(x) */ |
30 | double | |
f29b7c49 | 31 | __log_compat (double x) |
f7eac6eb | 32 | { |
92221550 | 33 | if (__builtin_expect (islessequal (x, 0.0), 0) && _LIB_VERSION != _IEEE_) |
0ac5ae23 UD |
34 | { |
35 | if (x == 0.0) | |
36 | { | |
0747f818 | 37 | __feraiseexcept (FE_DIVBYZERO); |
0ac5ae23 UD |
38 | return __kernel_standard (x, x, 16); /* log(0) */ |
39 | } | |
40 | else | |
41 | { | |
0747f818 | 42 | __feraiseexcept (FE_INVALID); |
0ac5ae23 UD |
43 | return __kernel_standard (x, x, 17); /* log(x<0) */ |
44 | } | |
45 | } | |
46 | ||
47 | return __ieee754_log (x); | |
f7eac6eb | 48 | } |
f29b7c49 SN |
49 | # if SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_29) |
50 | compat_symbol (libm, __log_compat, log, GLIBC_2_0); | |
51 | # endif | |
52 | # ifdef NO_LONG_DOUBLE | |
53 | weak_alias (__log_compat, logl) | |
54 | # endif | |
55 | # ifdef LONG_DOUBLE_COMPAT | |
56 | /* Work around gas bug "multiple versions for symbol". */ | |
57 | weak_alias (__log_compat, __log_compat_alias) | |
58 | ||
59 | LONG_DOUBLE_COMPAT_CHOOSE_libm_logl ( | |
60 | compat_symbol (libm, __log_compat_alias, logl, FIRST_VERSION_libm_logl), ); | |
61 | # endif | |
cccda09f | 62 | #endif |