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4c4b9518 | 1 | /* Enable floating-point exceptions. |
2b778ceb | 2 | Copyright (C) 2000-2021 Free Software Foundation, Inc. |
4c4b9518 UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Jakub Jelinek <jakub@redhat.com>, 2000. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
4c4b9518 UD |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
4c4b9518 | 15 | |
41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 17 | License along with the GNU C Library; if not, see |
5a82c748 | 18 | <https://www.gnu.org/licenses/>. */ |
4c4b9518 UD |
19 | |
20 | #include <fenv.h> | |
ec07242c | 21 | #include <fenv_private.h> |
4c4b9518 UD |
22 | |
23 | int | |
24 | feenableexcept (int excepts) | |
25 | { | |
26 | fenv_t new_exc, old_exc; | |
27 | ||
28 | __fenv_stfsr (new_exc); | |
29 | ||
30 | old_exc = (new_exc >> 18) & FE_ALL_EXCEPT; | |
31 | new_exc |= (((fenv_t)excepts & FE_ALL_EXCEPT) << 18); | |
32 | ||
33 | __fenv_ldfsr (new_exc); | |
34 | ||
35 | return old_exc; | |
36 | } |