sysdeps/powerpc/nofpu/sim-full.c

   1 /* Software floating-point exception handling emulation.
   2    Copyright (C) 2002-2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library.  If not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <signal.h>
  20 #include "soft-fp.h"
  21 #include "soft-supp.h"
  22
  23 /* Thread-local to store sticky exceptions.  */
  24 __thread int __sim_exceptions_thread;
  25 libc_hidden_tls_def (__sim_exceptions_thread);
  26
  27 /* By default, no exceptions should trap.  */
  28 __thread int __sim_disabled_exceptions_thread = 0xffffffff;
  29 libc_hidden_tls_def (__sim_disabled_exceptions_thread);
  30
  31 __thread int __sim_round_mode_thread;
  32 libc_hidden_tls_def (__sim_round_mode_thread);
  33
  34 #if SIM_GLOBAL_COMPAT
  35 int __sim_exceptions_global;
  36 libc_hidden_data_def (__sim_exceptions_global);
  37 SIM_COMPAT_SYMBOL (__sim_exceptions_global, __sim_exceptions);
  38
  39 int __sim_disabled_exceptions_global = 0xffffffff;
  40 libc_hidden_data_def (__sim_disabled_exceptions_global);
  41 SIM_COMPAT_SYMBOL (__sim_disabled_exceptions_global,
  42                    __sim_disabled_exceptions);
  43
  44 int __sim_round_mode_global;
  45 libc_hidden_data_def (__sim_round_mode_global);
  46 SIM_COMPAT_SYMBOL (__sim_round_mode_global, __sim_round_mode);
  47 #endif
  48
  49 void
  50 __simulate_exceptions (int x)
  51 {
  52   __sim_exceptions_thread |= x;
  53   SIM_SET_GLOBAL (__sim_exceptions_global, __sim_exceptions_thread);
  54   if (x & ~__sim_disabled_exceptions_thread)
  55     raise (SIGFPE);
  56 }