1 /* Store current floating-point environment and clear exceptions.
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
21 int
__feholdexcept(fenv_t * envp)22 __feholdexcept (fenv_t *envp)
23 {
24 fexcept_t fpcr, fpsr;
25
26 /* Store the environment. */
27 #ifdef __mcoldfire__
28 __asm__ ("fmove%.l %/fpcr,%0" : "=dm" (envp->__control_register));
29 __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (envp->__status_register));
30 __asm__ ("fmove%.l %/fpiar,%0" : "=dm" (envp->__instruction_address));
31 #else
32 __asm__ ("fmovem%.l %/fpcr/%/fpsr/%/fpiar,%0" : "=m" (*envp));
33 #endif
34
35 /* Now clear all exceptions. */
36 fpsr = envp->__status_register & ~FE_ALL_EXCEPT;
37 __asm__ __volatile__ ("fmove%.l %0,%/fpsr" : : "dm" (fpsr));
38 /* And set all exceptions to non-stop. */
39 fpcr = envp->__control_register & ~(FE_ALL_EXCEPT << 6);
40 __asm__ __volatile__ ("fmove%.l %0,%!" : : "dm" (fpcr));
41
42 return 0;
43 }
44 libm_hidden_def (__feholdexcept)
45 weak_alias (__feholdexcept, feholdexcept)
46 libm_hidden_weak (feholdexcept)
47