1 /* Clear given exceptions in current floating-point environment.
2 Copyright (C) 1998-2022 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.h>
20 #include <fenv_libc.h>
21 #include <fpu_control.h>
22
23 int
feclearexcept(int excepts)24 feclearexcept (int excepts)
25 {
26 int cw;
27
28 /* Mask out unsupported bits/exceptions. */
29 excepts &= FE_ALL_EXCEPT;
30
31 /* Read the complete control word. */
32 _FPU_GETCW (cw);
33
34 /* Clear exception flag bits and cause bits. If the cause bit is not
35 cleared, the next CTC instruction (just below) will re-generate the
36 exception. */
37
38 cw &= ~(excepts | (excepts << CAUSE_SHIFT));
39
40 /* Put the new data in effect. */
41 _FPU_SETCW (cw);
42
43 /* Success. */
44 return 0;
45 }
46 libm_hidden_def (feclearexcept)
47