mupen64plus-oldsvn/r4300/cop0.c

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 *   Mupen64plus - cop0.h                                                  *
 *   Mupen64Plus homepage: http://code.google.com/p/mupen64plus/           *
 *   Copyright (C) 2002 Hacktarux                                          *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.          *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#include "r4300.h"
#include "macros.h"
#include "ops.h"
#include "interupt.h"

void MFC0(void)
{
   switch(PC->f.r.nrd)
     {
      case 1:
    printf("lecture de Random\n");
    stop=1;
      case 9:    // Count
    update_count();
      default:
    rrt32 = reg_cop0[PC->f.r.nrd];
    sign_extended(rrt);
     }
   PC++;
}

void MTC0(void)
{
   switch(PC->f.r.nrd)
     {
      case 0:    // Index
    Index = rrt & 0x8000003F;
    if ((Index & 0x3F) > 31) 
      {
         printf ("il y a plus de 32 TLB\n");
         stop=1;
      }
    break;
      case 1:    // Random
    break;
      case 2:    // EntryLo0
    EntryLo0 = rrt & 0x3FFFFFFF;
    break;
      case 3:    // EntryLo1
    EntryLo1 = rrt & 0x3FFFFFFF;
    break;
      case 4:    // Context
    Context = (rrt & 0xFF800000) | (Context & 0x007FFFF0);
    break;
      case 5:    // PageMask
    PageMask = rrt & 0x01FFE000;
    break;
      case 6:    // Wired
    Wired = rrt;
    Random = 31;
    break;
      case 8:    // BadVAddr
    break;
      case 9:    // Count
    update_count();
    //if (next_interupt <= Count) gen_interupt();
    debug_count += Count;
    translate_event_queue(rrt & 0xFFFFFFFF);
    Count = rrt & 0xFFFFFFFF;
    debug_count -= Count;
    break;
      case 10:   // EntryHi
    EntryHi = rrt & 0xFFFFE0FF;
    break;
      case 11:   // Compare
    update_count();
    remove_event(COMPARE_INT);
    add_interupt_event_count(COMPARE_INT, (unsigned int)rrt);
    Compare = rrt;
    Cause = Cause & 0xFFFF7FFF; //Timer interupt is clear
    break;
      case 12:   // Status
    if((rrt & 0x04000000) != (Status & 0x04000000))
      {
         if (rrt & 0x04000000)
           {
          int i;
          for (i=0; i<32; i++)
            {
               reg_cop1_double[i]=(double*)&reg_cop1_fgr_64[i];
               reg_cop1_simple[i]=(float*)&reg_cop1_fgr_64[i];
            }
           }
         else
           {
          int i;
          for (i=0; i<32; i++)
            {
               if(!(i&1))
             reg_cop1_double[i]=(double*)&reg_cop1_fgr_64[i>>1];
#ifndef _BIG_ENDIAN
               reg_cop1_simple[i]=(float*)&reg_cop1_fgr_64[i>>1]+(i&1);
#else
               reg_cop1_simple[i]=(float*)&reg_cop1_fgr_64[i>>1]+(1-(i&1));
#endif
            }
           }
      }
    Status = rrt;
    update_count();
    PC++;
    check_interupt();
    if (next_interupt <= Count) gen_interupt();
    PC--;
    break;
      case 13:   // Cause
    if (rrt!=0)
      {
         printf("<EFBFBD>criture dans Cause\n");
         stop = 1;
      }
    else Cause = rrt;
    break;
      case 14:   // EPC
    EPC = rrt;
    break;
      case 15:  // PRevID
    break;
      case 16:  // Config
    Config = rrt;
    break;
      case 18:  // WatchLo
    WatchLo = rrt & 0xFFFFFFFF;
    break;
      case 19:  // WatchHi
    WatchHi = rrt & 0xFFFFFFFF;
    break;
      case 27:  // CacheErr
    break;
      case 28:  // TagLo
    TagLo = rrt & 0x0FFFFFC0;
    break;
      case 29: // TagHi
    TagHi =0;
    break;
      default:
    printf("unknown mtc0 write : %d\n", PC->f.r.nrd);
    stop=1;
     }
   PC++;
}