/* Software floating-point exception handling emulation.

   Copyright (C) 2002-2018 Free Software Foundation, Inc.

   Contributed by Aldy Hernandez <aldyh@redhat.com>, 2002.

   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 <signal.h>

#include "soft-fp.h"

#include "soft-supp.h"

/* Thread-local to store sticky exceptions.  */

__thread int __sim_exceptions_thread __attribute__ ((nocommon));

libc_hidden_data_def (__sim_exceptions_thread);

/* By default, no exceptions should trap.  */

__thread int __sim_disabled_exceptions_thread = 0xffffffff;

libc_hidden_data_def (__sim_disabled_exceptions_thread);

__thread int __sim_round_mode_thread __attribute__ ((nocommon));

libc_hidden_data_def (__sim_round_mode_thread);

#if SIM_GLOBAL_COMPAT

int __sim_exceptions_global __attribute__ ((nocommon));

libc_hidden_data_def (__sim_exceptions_global);

SIM_COMPAT_SYMBOL (__sim_exceptions_global, __sim_exceptions);

int __sim_disabled_exceptions_global = 0xffffffff;

libc_hidden_data_def (__sim_disabled_exceptions_global);

SIM_COMPAT_SYMBOL (__sim_disabled_exceptions_global,

		   __sim_disabled_exceptions);

int __sim_round_mode_global __attribute__ ((nocommon));

libc_hidden_data_def (__sim_round_mode_global);

SIM_COMPAT_SYMBOL (__sim_round_mode_global, __sim_round_mode);

#endif

void

__simulate_exceptions (int x)

{

  __sim_exceptions_thread |= x;

  SIM_SET_GLOBAL (__sim_exceptions_global, __sim_exceptions_thread);

  if (x & ~__sim_disabled_exceptions_thread)

    raise (SIGFPE);

}