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 3 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, see <http://www.gnu.org/licenses/>.
  17
  18     */
  19
  20 /* This must come before any other includes.  */
  21 #include "defs.h"
  22
  23 #include "sim-main.h"
  24 #include "m16_idecode.h"
  25 #include "m32_idecode.h"
  26 #include "bfd.h"
  27 #include "sim-engine.h"
  28
  29
  30 #define SD sd
  31 #define CPU cpu
  32
  33 void
  34 sim_engine_run (SIM_DESC sd,
  35                 int next_cpu_nr,
  36                 int nr_cpus, /* ignore */
  37                 int siggnal) /* ignore */
  38 {
  39   sim_cpu *cpu = STATE_CPU (sd, next_cpu_nr);
  40   address_word cia = CPU_PC_GET (cpu);
  41
  42   while (1)
  43     {
  44       address_word nia;
  45
  46 #if defined (ENGINE_ISSUE_PREFIX_HOOK)
  47       ENGINE_ISSUE_PREFIX_HOOK ();
  48 #endif
  49
  50       if ((cia & 1))
  51         {
  52           m16_instruction_word instruction_0 = IMEM16 (cia);
  53           nia = m16_idecode_issue (sd, instruction_0, cia);
  54         }
  55       else
  56         {
  57           m32_instruction_word instruction_0 = IMEM32 (cia);
  58           nia = m32_idecode_issue (sd, instruction_0, cia);
  59         }
  60
  61       /* Update the instruction address */
  62       cia = nia;
  63
  64       /* process any events */
  65       if (sim_events_tick (sd))
  66         {
  67           CPU_PC_SET (CPU, cia);
  68           sim_events_process (sd);
  69           cia = CPU_PC_GET (CPU);
  70         }
  71
  72     }
  73 }