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_libc.h>
20
21 #undef feclearexcept
22 int
__feclearexcept(int excepts)23 __feclearexcept (int excepts)
24 {
25 fenv_union_t u, n;
26
27 /* Get the current state. */
28 u.fenv = fegetenv_register ();
29
30 /* Clear the relevant bits. */
31 n.l = u.l & ~((-(excepts >> (31 - FPSCR_VX) & 1) & FE_ALL_INVALID)
32 | (excepts & FPSCR_STICKY_BITS));
33
34 /* Put the new state in effect. */
35 if (u.l != n.l)
36 fesetenv_register (n.fenv);
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