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f10fa39c | 1 | /* Disable floating-point exceptions. |
2b778ceb | 2 | Copyright (C) 2000-2021 Free Software Foundation, Inc. |
f10fa39c AS |
3 | This file is part of the GNU C Library. |
4 | Contributed by Andreas Schwab <schwab@suse.de>, 2000. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
3214b89b 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. | |
f10fa39c AS |
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 | |
3214b89b | 14 | Lesser General Public License for more details. |
f10fa39c | 15 | |
3214b89b | 16 | You should have received a copy of the GNU Lesser General Public |
ab84e3ff | 17 | License along with the GNU C Library. If not, see |
5a82c748 | 18 | <https://www.gnu.org/licenses/>. */ |
f10fa39c AS |
19 | |
20 | #include <fenv.h> | |
21 | ||
22 | int | |
23 | fedisableexcept (int excepts) | |
24 | { | |
25 | unsigned int old_exc, new_exc; | |
26 | ||
27 | /* Get the current control register contents. */ | |
28 | __asm__ ("fmove%.l %!,%0" : "=dm" (new_exc)); | |
29 | ||
30 | old_exc = (new_exc >> 6) & FE_ALL_EXCEPT; | |
31 | ||
32 | excepts &= FE_ALL_EXCEPT; | |
33 | ||
34 | new_exc &= ~(excepts << 6); | |
35 | __asm__ ("fmove%.l %0,%!" : : "dm" (new_exc)); | |
36 | ||
37 | return old_exc; | |
38 | } |