1 | /* Clear given exceptions in current floating-point environment. |
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 | #include <fpu_control.h> |
21 | |
22 | int |
23 | feclearexcept (int excepts) |
24 | { |
25 | fexcept_t temp; |
26 | |
27 | /* Mask out unsupported bits/exceptions. */ |
28 | excepts &= FE_ALL_EXCEPT; |
29 | |
30 | _FPU_GETCW (temp); |
31 | /* Clear the relevant bits. */ |
32 | temp &= ~(excepts << FPC_FLAGS_SHIFT); |
33 | if ((temp & FPC_NOT_FPU_EXCEPTION) == 0) |
34 | /* Bits 6, 7 of dxc-byte are zero, |
35 | thus bits 0-5 of dxc-byte correspond to the flag-bits. |
36 | Clear the relevant bits in flags and dxc-field. */ |
37 | temp &= ~(excepts << FPC_DXC_SHIFT); |
38 | |
39 | /* Put the new data in effect. */ |
40 | _FPU_SETCW (temp); |
41 | |
42 | /* Success. */ |
43 | return 0; |
44 | } |
45 | libm_hidden_def (feclearexcept) |
46 | |