1 | /* Enable floating-point exceptions. |
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2 | Copyright (C) 2000-2024 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
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 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <fenv_libc.h> |
20 | |
21 | int |
22 | feenableexcept (int excepts) |
23 | { |
24 | fenv_union_t fe, curr; |
25 | int result, new; |
26 | |
27 | /* Get current exception mask to return. */ |
28 | fe.fenv = curr.fenv = fegetenv_control (); |
29 | result = fenv_reg_to_exceptions (l: fe.l); |
30 | |
31 | if ((excepts & FE_ALL_INVALID) == FE_ALL_INVALID) |
32 | excepts = (excepts | FE_INVALID) & ~ FE_ALL_INVALID; |
33 | |
34 | new = fenv_exceptions_to_reg (excepts); |
35 | |
36 | if (fenv_reg_to_exceptions (l: new) != excepts) |
37 | return -1; |
38 | |
39 | /* Sets the new exception mask. */ |
40 | fe.l |= new; |
41 | |
42 | if (fe.l != curr.l) |
43 | fesetenv_control (fe.fenv); |
44 | |
45 | __TEST_AND_EXIT_NON_STOP (0ULL, fe.l); |
46 | |
47 | return result; |
48 | } |
49 |