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
  28
  29 #define SD sd
  30 #define CPU cpu
  31
  32 void
  33 sim_engine_run (SIM_DESC sd,
  34                 int next_cpu_nr,
  35                 int nr_cpus, /* ignore */
  36                 int siggnal) /* ignore */
  37 {
  38   sim_cpu *cpu = STATE_CPU (sd, next_cpu_nr);
  39   address_word cia = CPU_PC_GET (cpu);
  40
  41   while (1)
  42     {
  43       address_word nia;
  44
  45 #if defined (ENGINE_ISSUE_PREFIX_HOOK)
  46       ENGINE_ISSUE_PREFIX_HOOK ();
  47 #endif
  48
  49       if ((cia & 1))
  50         {
  51           m16_instruction_word instruction_0 = IMEM16 (cia);
  52           nia = m16_idecode_issue (sd, instruction_0, cia);
  53         }
  54       else
  55         {
  56           m32_instruction_word instruction_0 = IMEM32 (cia);
  57           nia = m32_idecode_issue (sd, instruction_0, cia);
  58         }
  59
  60 #if defined (ENGINE_ISSUE_POSTFIX_HOOK)
  61       ENGINE_ISSUE_POSTFIX_HOOK ();
  62 #endif
  63
  64       /* Update the instruction address */
  65       cia = nia;
  66
  67       /* process any events */
  68       if (sim_events_tick (sd))
  69         {
  70           CPU_PC_SET (CPU, cia);
  71           sim_events_process (sd);
  72           cia = CPU_PC_GET (CPU);
  73         }
  74
  75     }
  76 }