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4a986c1a | 1 | /* Clear given exceptions in current floating-point environment. |
d614a753 | 2 | Copyright (C) 1998-2020 Free Software Foundation, Inc. |
4a986c1a | 3 | This file is part of the GNU C Library. |
17e74c26 | 4 | Contributed by Andreas Jaeger <aj@suse.de>, 1998. |
4a986c1a UD |
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. | |
4a986c1a 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 | |
3214b89b | 14 | Lesser General Public License for more details. |
4a986c1a | 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/>. */ |
4a986c1a UD |
19 | |
20 | #include <fenv.h> | |
f1cdba97 | 21 | #include <fenv_libc.h> |
4a986c1a UD |
22 | #include <fpu_control.h> |
23 | ||
24 | int | |
07526436 | 25 | feclearexcept (int excepts) |
4a986c1a UD |
26 | { |
27 | int cw; | |
28 | ||
29 | /* Mask out unsupported bits/exceptions. */ | |
30 | excepts &= FE_ALL_EXCEPT; | |
31 | ||
32 | /* Read the complete control word. */ | |
33 | _FPU_GETCW (cw); | |
34 | ||
f1cdba97 | 35 | /* Clear exception flag bits and cause bits. If the cause bit is not |
07526436 AJ |
36 | cleared, the next CTC instruction (just below) will re-generate the |
37 | exception. */ | |
f1cdba97 AJ |
38 | |
39 | cw &= ~(excepts | (excepts << CAUSE_SHIFT)); | |
4a986c1a UD |
40 | |
41 | /* Put the new data in effect. */ | |
42 | _FPU_SETCW (cw); | |
43 | ||
44 | /* Success. */ | |
45 | return 0; | |
46 | } | |
5b5b04d6 | 47 | libm_hidden_def (feclearexcept) |