1 /* Raise given exceptions.
2 Copyright (C) 2000-2025 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 "fenv_libc.h"
20 #include <fpu_control.h>
21
22 int
feraiseexcept(int excepts)23 feraiseexcept (int excepts)
24 {
25 fpu_control_t cw;
26
27 /* Get current state. */
28 _FPU_GETCW (cw);
29
30 /* Set flag bits (which are accumulative), and *also* set the
31 cause bits. The setting of the cause bits is what actually causes
32 the hardware to generate the exception, if the corresponding enable
33 bit is set as well. */
34
35 excepts &= FE_ALL_EXCEPT;
36 cw |= excepts | (excepts << CAUSE_SHIFT);
37
38 /* Set new state. */
39 _FPU_SETCW (cw);
40
41 return 0;
42 }
43