sim/mips/m16run.c

   1 /*  This file is part of the program psim.
   2
   3     Copyright (C) 1998, Andrew Cagney <cagney@highland.com.au>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program 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
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19     */
  20
  21 #include "sim-main.h"
  22 #include "m16_idecode.h"
  23 #include "m32_idecode.h"
  24 #include "bfd.h"
  25
  26
  27 #define SD sd
  28 #define CPU cpu
  29
  30 void
  31 sim_engine_run (SIM_DESC sd,
  32                 int next_cpu_nr,
  33                 int nr_cpus, /* ignore */
  34                 int siggnal) /* ignore */
  35 {
  36   sim_cpu *cpu = STATE_CPU (sd, next_cpu_nr);
  37   address_word cia = CIA_GET (cpu);
  38
  39   while (1)
  40     {
  41       address_word nia;
  42
  43 #if defined (ENGINE_ISSUE_PREFIX_HOOK)
  44       ENGINE_ISSUE_PREFIX_HOOK ();
  45 #endif
  46
  47       if ((cia & 1))
  48         {
  49           m16_instruction_word instruction_0 = IMEM16 (cia);
  50           nia = m16_idecode_issue (sd, instruction_0, cia);
  51         }
  52       else
  53         {
  54           m32_instruction_word instruction_0 = IMEM32 (cia);
  55           nia = m32_idecode_issue (sd, instruction_0, cia);
  56         }
  57
  58 #if defined (ENGINE_ISSUE_POSTFIX_HOOK)
  59       ENGINE_ISSUE_POSTFIX_HOOK ();
  60 #endif
  61
  62       /* Update the instruction address */
  63       cia = nia;
  64
  65       /* process any events */
  66       if (sim_events_tick (sd))
  67         {
  68           CIA_SET (CPU, cia);
  69           sim_events_process (sd);
  70           cia = CIA_GET (CPU);
  71         }
  72
  73     }
  74 }