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b168057a | 1 | /* Copyright (C) 2012-2015 Free Software Foundation, Inc. |
76da7265 AZ |
2 | This file is part of the GNU C Library. |
3 | Contributed by Adhemerval Zanella <azanella@linux.vnet.ibm.com>, 2011. | |
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 | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <math.h> | |
20 | #include <errno.h> | |
38de94a5 | 21 | #include <limits.h> |
76da7265 AZ |
22 | #include <math_private.h> |
23 | ||
24 | /* wrapper ilogbf */ | |
25 | int | |
26 | __ilogbf (float x) | |
27 | { | |
28 | int r = __ieee754_ilogbf (x); | |
29 | if (__builtin_expect (r == FP_ILOGB0, 0) | |
30 | || __builtin_expect (r == FP_ILOGBNAN, 0) | |
31 | || __builtin_expect (r == INT_MAX, 0)) | |
32 | { | |
33 | __set_errno (EDOM); | |
34 | feraiseexcept (FE_INVALID); | |
35 | } | |
36 | return r; | |
37 | } | |
76da7265 | 38 | weak_alias (__ilogbf, ilogbf) |