1 /* Set floating-point environment exception handling.
2 Copyright (C) 1998-2025 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 #include <fpu_control.h>
20
21 int
fesetexceptflag(const fexcept_t * flagp,int excepts)22 fesetexceptflag (const fexcept_t *flagp, int excepts)
23 {
24 fpu_control_t temp;
25
26 /* Get the current exceptions. */
27 _FPU_GETCW (temp);
28
29 /* Make sure the flags we want restored are legal. */
30 excepts &= FE_ALL_EXCEPT;
31
32 /* Now clear the bits called for, and copy them in from flagp. Note that
33 we ignore all non-flag bits from *flagp, so they don't matter. */
34 temp = (temp & ~excepts) | (*flagp & excepts);
35
36 _FPU_SETCW (temp);
37
38 /* Success. */
39 return 0;
40 }
41