1 /* Install given floating-point environment and raise exceptions.
2 Copyright (C) 2004 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Aldy Hernandez <aldyh@redhat.com>, 2004.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
20 #include "fenv_libc.h"
22 #include <sys/prctl.h>
25 __feupdateenv (const fenv_t *envp)
27 unsigned long fpescr, old, new, pflags;
29 INTERNAL_SYSCALL_DECL (err);
31 /* Save the currently set exceptions. */
34 old = fegetenv_register ();
35 new |= (old & FE_ALL_EXCEPT);
37 INTERNAL_SYSCALL (prctl, err, 2, PR_GET_FPEXC, &pflags);
39 INTERNAL_SYSCALL (prctl, err, 2, PR_SET_FPEXC, pflags);
41 /* Enable and raise (if appropriate) exceptions set in `new'. */
42 fesetenv_register (new);
43 feraiseexcept (new & FE_ALL_EXCEPT);