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/* Store current floating-point environment and clear exceptions.
Copyright (C) 2004, 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Aldy Hernandez <aldyh@redhat.com>, 2004.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include "fenv_libc.h"
#include <syscall.h>
#include <sys/prctl.h>
int
feholdexcept (fenv_t *envp)
{
fenv_union_t u;
INTERNAL_SYSCALL_DECL (err);
/* Get the current state. */
INTERNAL_SYSCALL (prctl, err, 2, PR_GET_FPEXC, &u.l[0]);
u.l[1] = fegetenv_register ();
*envp = u.fenv;
/* Clear everything except for the rounding mode. */
u.l[1] &= 3;
/* Put the new state in effect. */
fesetenv_register (u.l[1]);
return 0;
}
libm_hidden_def (feholdexcept)
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