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2b778ceb | 1 | /* Copyright (C) 2011-2021 Free Software Foundation, Inc. |
0ac5ae23 | 2 | This file is part of the GNU C Library. |
f7eac6eb | 3 | |
0ac5ae23 UD |
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. | |
f7eac6eb | 13 | |
0ac5ae23 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
f7eac6eb | 17 | |
0ac5ae23 | 18 | #include <fenv.h> |
9d13fb24 | 19 | #include <math.h> |
9277c064 | 20 | #include <math_private.h> |
813378e9 | 21 | #include <math-svid-compat.h> |
9ac44708 | 22 | #include <libm-alias-double.h> |
f7eac6eb RM |
23 | |
24 | ||
f29b7c49 SN |
25 | #if LIBM_SVID_COMPAT && (SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_29) \ |
26 | || defined NO_LONG_DOUBLE \ | |
27 | || defined LONG_DOUBLE_COMPAT) | |
0ac5ae23 UD |
28 | /* wrapper log(x) */ |
29 | double | |
f29b7c49 | 30 | __log_compat (double x) |
f7eac6eb | 31 | { |
92221550 | 32 | if (__builtin_expect (islessequal (x, 0.0), 0) && _LIB_VERSION != _IEEE_) |
0ac5ae23 UD |
33 | { |
34 | if (x == 0.0) | |
35 | { | |
0747f818 | 36 | __feraiseexcept (FE_DIVBYZERO); |
0ac5ae23 UD |
37 | return __kernel_standard (x, x, 16); /* log(0) */ |
38 | } | |
39 | else | |
40 | { | |
0747f818 | 41 | __feraiseexcept (FE_INVALID); |
0ac5ae23 UD |
42 | return __kernel_standard (x, x, 17); /* log(x<0) */ |
43 | } | |
44 | } | |
45 | ||
46 | return __ieee754_log (x); | |
f7eac6eb | 47 | } |
f29b7c49 SN |
48 | # if SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_29) |
49 | compat_symbol (libm, __log_compat, log, GLIBC_2_0); | |
50 | # endif | |
51 | # ifdef NO_LONG_DOUBLE | |
52 | weak_alias (__log_compat, logl) | |
53 | # endif | |
54 | # ifdef LONG_DOUBLE_COMPAT | |
55 | /* Work around gas bug "multiple versions for symbol". */ | |
56 | weak_alias (__log_compat, __log_compat_alias) | |
57 | ||
58 | LONG_DOUBLE_COMPAT_CHOOSE_libm_logl ( | |
59 | compat_symbol (libm, __log_compat_alias, logl, FIRST_VERSION_libm_logl), ); | |
60 | # endif | |
cccda09f | 61 | #endif |