1 /* Clear given exceptions in current floating-point environment.
2 Copyright (C) 1997-2025 Free Software Foundation, Inc.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library. If not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #include <fenv.h>
19
20 int
feclearexcept(int excepts)21 feclearexcept (int excepts)
22 {
23 fexcept_t fpsr;
24
25 /* Mask out unsupported bits/exceptions. */
26 excepts &= FE_ALL_EXCEPT;
27
28 /* Fetch the fpu status register. */
29 __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (fpsr));
30
31 /* Clear the relevant bits. */
32 fpsr &= ~excepts;
33
34 /* Put the new data in effect. */
35 __asm__ __volatile__ ("fmove%.l %0,%/fpsr" : : "dm" (fpsr));
36
37 /* Success. */
38 return 0;
39 }
40