1/* Install given floating-point environment and raise exceptions.
2 Copyright (C) 1997-2023 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
21int
22__feupdateenv (const fenv_t *envp)
23{
24 fexcept_t temp;
25 unsigned int xtemp;
26
27 /* Save current exceptions. */
28 __asm__ ("fnstsw %0\n\tstmxcsr %1" : "=m" (*&temp), "=m" (xtemp));
29 temp = (temp | xtemp) & FE_ALL_EXCEPT;
30
31 /* Install new environment. */
32 __fesetenv (envp);
33
34 /* Raise the saved exception. Incidentally for us the implementation
35 defined format of the values in objects of type fexcept_t is the
36 same as the ones specified using the FE_* constants. */
37 __feraiseexcept ((int) temp);
38
39 /* Success. */
40 return 0;
41}
42
43#include <shlib-compat.h>
44#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
45strong_alias (__feupdateenv, __old_feupdateenv)
46compat_symbol (libm, __old_feupdateenv, feupdateenv, GLIBC_2_1);
47#endif
48
49libm_hidden_def (__feupdateenv)
50libm_hidden_ver (__feupdateenv, feupdateenv)
51versioned_symbol (libm, __feupdateenv, feupdateenv, GLIBC_2_2);
52