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/* Clear floating-point exceptions for atomic compound assignment.
e500 version.
Copyright (C) 2004-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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 <stdlib.h>
#include <sysdep.h>
#include <sys/prctl.h>
void
__atomic_feclearexcept (void)
{
unsigned int fpescr, old_fpescr;
/* Get the current state. */
old_fpescr = fpescr = fegetenv_register ();
/* Clear the relevant bits. */
fpescr &= ~SPEFSCR_ALL_EXCEPT;
/* Put the new state in effect. */
fesetenv_register (fpescr);
/* Let the kernel know if the "invalid" or "underflow" bit was
cleared. */
if (old_fpescr & (SPEFSCR_FINVS | SPEFSCR_FUNFS))
{
int pflags __attribute__ ((__unused__)), r;
INTERNAL_SYSCALL_DECL (err);
r = INTERNAL_SYSCALL (prctl, err, 2, PR_GET_FPEXC, &pflags);
if (INTERNAL_SYSCALL_ERROR_P (r, err))
abort ();
}
}
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