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e5277ba2 | 1 | /* Wrapper to set errno for ilogb. |
2b778ceb | 2 | Copyright (C) 2012-2021 Free Software Foundation, Inc. |
76da7265 | 3 | This file is part of the GNU C Library. |
76da7265 AZ |
4 | |
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. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
76da7265 AZ |
18 | |
19 | #include <math.h> | |
20 | #include <errno.h> | |
c23c33b0 | 21 | #include <limits.h> |
76da7265 | 22 | #include <math_private.h> |
418d99e6 | 23 | #include <fenv.h> |
76da7265 AZ |
24 | |
25 | /* wrapper ilogb */ | |
26 | int | |
e5277ba2 | 27 | M_DECL_FUNC (__ilogb) (FLOAT x) |
76da7265 | 28 | { |
e5277ba2 | 29 | int r = M_SUF (__ieee754_ilogb) (x); |
76da7265 AZ |
30 | if (__builtin_expect (r == FP_ILOGB0, 0) |
31 | || __builtin_expect (r == FP_ILOGBNAN, 0) | |
32 | || __builtin_expect (r == INT_MAX, 0)) | |
33 | { | |
34 | __set_errno (EDOM); | |
0747f818 | 35 | __feraiseexcept (FE_INVALID); |
76da7265 AZ |
36 | } |
37 | return r; | |
38 | } | |
e5277ba2 | 39 | declare_mgen_alias (__ilogb, ilogb) |