1 /* Set floating-point environment exception handling.
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.h>
20 #include <math.h>
21
22 int
__fesetexceptflag(const fexcept_t * flagp,int excepts)23 __fesetexceptflag (const fexcept_t *flagp, int excepts)
24 {
25 fexcept_t fpsr;
26
27 /* Get the current status register. */
28 __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (fpsr));
29
30 /* Install the new exception bits in the Accrued Exception Byte. */
31 fpsr &= ~(excepts & FE_ALL_EXCEPT);
32 fpsr |= *flagp & excepts & FE_ALL_EXCEPT;
33
34 /* Store the new status register. */
35 __asm__ __volatile__ ("fmove%.l %0,%/fpsr" : : "dm" (fpsr));
36
37 /* Success. */
38 return 0;
39 }
40
41 #include <shlib-compat.h>
42 #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
43 strong_alias (__fesetexceptflag, __old_fesetexceptflag)
44 compat_symbol (libm, __old_fesetexceptflag, fesetexceptflag, GLIBC_2_1);
45 #endif
46
47 versioned_symbol (libm, __fesetexceptflag, fesetexceptflag, GLIBC_2_2);
48