Back to index

glibc  2.9
sim-full.c
Go to the documentation of this file.
00001 /* Software floating-point exception handling emulation.
00002    Copyright (C) 2002, 2004 Free Software Foundation, Inc.
00003    Contributed by Aldy Hernandez <aldyh@redhat.com>, 2002.
00004    This file is part of the GNU C Library.
00005 
00006    The GNU C Library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Lesser General Public
00008    License as published by the Free Software Foundation; either
00009    version 2.1 of the License, or (at your option) any later version.
00010 
00011    The GNU C Library is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014    Lesser General Public License for more details.
00015 
00016    You should have received a copy of the GNU Lesser General Public
00017    License along with the GNU C Library; if not, write to the Free
00018    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00019    02111-1307 USA.  */
00020 
00021 #include <signal.h>
00022 #include "soft-fp.h"
00023 #include "soft-supp.h"
00024 
00025 /* Global to store sticky exceptions.  */
00026 int __sim_exceptions __attribute__ ((nocommon));
00027 libc_hidden_data_def (__sim_exceptions);
00028 
00029 /* By default, no exceptions should trap.  */
00030 int __sim_disabled_exceptions = 0xffffffff;
00031 libc_hidden_data_def (__sim_disabled_exceptions);
00032 
00033 int __sim_round_mode __attribute__ ((nocommon));
00034 libc_hidden_data_def (__sim_round_mode);
00035 
00036 void
00037 __simulate_exceptions (int x)
00038 {
00039   __sim_exceptions |= x;
00040   if (x & ~__sim_disabled_exceptions)
00041     raise (SIGFPE);
00042 }