1 /* Set floating-point environment exception handling.
2 Copyright (C) 1997-2025 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 <math.h>
20
21 int
fesetexceptflag(const fexcept_t * flagp,int excepts)22 fesetexceptflag (const fexcept_t *flagp, int excepts)
23 {
24 fexcept_t fpsr;
25
26 /* Get the current status register. */
27 __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (fpsr));
28
29 /* Install the new exception bits in the Accrued Exception Byte. */
30 fpsr &= ~(excepts & FE_ALL_EXCEPT);
31 fpsr |= *flagp & excepts & FE_ALL_EXCEPT;
32
33 /* Store the new status register. */
34 __asm__ __volatile__ ("fmove%.l %0,%/fpsr" : : "dm" (fpsr));
35
36 /* Success. */
37 return 0;
38 }
39