1 /* Install given floating-point environment and raise exceptions.
2 Copyright (C) 2018-2025 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 <fpu_control.h>
20 #include "fenv_libc.h"
21 #include "fenv_private.h"
22 #include <stdio.h>
23
24 int
feupdateenv(const fenv_t * envp)25 feupdateenv (const fenv_t *envp)
26 {
27 int temp;
28
29 /* Save current exceptions. */
30 _FPU_GETFPSR (temp);
31 temp = (temp >> CAUSE_SHIFT) & FE_ALL_EXCEPT;
32 /* Install new environment. */
33 fesetenv (envp);
34
35 /* Raise the saved exception. Incidentally for us the implementation
36 defined format of the values in objects of type fexcept_t is the
37 same as the ones specified using the FE_* constants. */
38 feraiseexcept (temp);
39
40 /* Success. */
41 return 0;
42 }
43