1 /* Store current floating-point environment and clear exceptions.
2 Copyright (C) 1997-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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/>. */
22 __feholdexcept (fenv_t
*envp
)
26 /* Store the environment. */
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
));
32 __asm__ ("fmovem%.l %/fpcr/%/fpsr/%/fpiar,%0" : "=m" (*envp
));
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
));
44 libm_hidden_def (__feholdexcept
)
45 weak_alias (__feholdexcept
, feholdexcept
)
46 libm_hidden_weak (feholdexcept
)