1 /* Clear given exceptions in current floating-point environment.
2 Copyright (C) 1997-2022 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
21 int
__feclearexcept(int excepts)22 __feclearexcept (int excepts)
23 {
24 fexcept_t fpsr;
25
26 /* Mask out unsupported bits/exceptions. */
27 excepts &= FE_ALL_EXCEPT;
28
29 /* Fetch the fpu status register. */
30 __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (fpsr));
31
32 /* Clear the relevant bits. */
33 fpsr &= ~excepts;
34
35 /* Put the new data in effect. */
36 __asm__ __volatile__ ("fmove%.l %0,%/fpsr" : : "dm" (fpsr));
37
38 /* Success. */
39 return 0;
40 }
41
42 #include <shlib-compat.h>
43 #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
44 strong_alias (__feclearexcept, __old_feclearexcept)
45 compat_symbol (libm, __old_feclearexcept, feclearexcept, GLIBC_2_1);
46 #endif
47
48 libm_hidden_ver (__feclearexcept, feclearexcept)
49 versioned_symbol (libm, __feclearexcept, feclearexcept, GLIBC_2_2);
50