1 /* Install given floating-point environment.
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
__fesetenv(const fenv_t * envp)22 __fesetenv (const fenv_t *envp)
23 {
24 fenv_t env;
25
26 /*
27 This stinks!
28 Magic encoding of default values: bit 62+63 set (which will never
29 happen for a user-space address) means it's not indirect.
30 */
31 if (((fenv_t) envp >> 62) == 0x03)
32 env = (fenv_t) envp & 0x3fffffffffffffff;
33 else
34 env = *envp;
35
36 __asm__ __volatile__ ("mov.m ar.fpsr=%0;;" :: "r" (env));
37
38 return 0;
39 }
40 libm_hidden_def (__fesetenv)
41 weak_alias (__fesetenv, fesetenv)
42 libm_hidden_weak (fesetenv)
43