sysdeps/powerpc/nofpu/sim-full.c

   1 /* Software floating-point exception handling emulation.
   2    Copyright (C) 2002, 2004 Free Software Foundation, Inc.
   3    Contributed by Aldy Hernandez <aldyh@redhat.com>, 2002.
   4    This file is part of the GNU C Library.
   5
   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.
  10
  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.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <signal.h>
  22 #include "soft-fp.h"
  23 #include "soft-supp.h"
  24
  25 /* Global to store sticky exceptions.  */
  26 int __sim_exceptions __attribute__ ((nocommon));
  27 libc_hidden_data_def (__sim_exceptions);
  28
  29 /* By default, no exceptions should trap.  */
  30 int __sim_disabled_exceptions = 0xffffffff;
  31 libc_hidden_data_def (__sim_disabled_exceptions);
  32
  33 int __sim_round_mode __attribute__ ((nocommon));
  34 libc_hidden_data_def (__sim_round_mode);
  35
  36 void
  37 __simulate_exceptions (int x)
  38 {
  39   __sim_exceptions |= x;
  40   if (x == 0 || __sim_disabled_exceptions & x)
  41     /* Ignore exception.  */
  42     ;
  43   else
  44     raise (SIGFPE);
  45 }