1 /* Set floating-point environment exception handling.
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 <fpu_control.h>
21
22 int
fesetexceptflag(const fexcept_t * flagp,int excepts)23 fesetexceptflag (const fexcept_t *flagp, int excepts)
24 {
25 fpu_control_t temp;
26
27 /* Get the current exceptions. */
28 _FPU_GETCW (temp);
29
30 /* Make sure the flags we want restored are legal. */
31 excepts &= FE_ALL_EXCEPT;
32
33 /* Now clear the bits called for, and copy them in from flagp. Note that
34 we ignore all non-flag bits from *flagp, so they don't matter. */
35 temp = (temp & ~excepts) | (*flagp & excepts);
36
37 _FPU_SETCW (temp);
38
39 /* Success. */
40 return 0;
41 }
42