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Sourcecode: desmume version File versions

thumb_instructions.c

/*  
      Copyright (C) 2006 yopyop
    yopyop156@ifrance.com
    yopyop156.ifrance.com

      Code added on 18/08/2006 by shash
            - Missing missaligned addresses correction
                  (reference in http://nocash.emubase.de/gbatek.htm#cpumemoryalignments)

    This file is part of DeSmuME 

    DeSmuME 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.

    DeSmuME 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 DeSmuME; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "bios.h"
#include "debug.h"
#include "MMU.h"

#define REG_NUM(i, n) (((i)>>n)&0x7)

extern BOOL execute;

static u32 FASTCALL OP_UND_THUMB(armcpu_t *cpu)
{
     execute = FALSE;
     return 1;
}

static u32 FASTCALL OP_LSL_0(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     cpu->R[REG_NUM(i, 0)] = cpu->R[REG_NUM(i, 3)];
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
        
     return 2;
}

static u32 FASTCALL OP_LSL(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 v = (i>>6) & 0x1F;
     cpu->CPSR.bits.C = BIT_N(cpu->R[REG_NUM(i, 3)], 32-v);
     cpu->R[REG_NUM(i, 0)] = (cpu->R[REG_NUM(i, 3)] << v);
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
        
     return 2;
}

static u32 FASTCALL OP_LSR_0(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
        // cpu->CPSR.bits.C = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.C = BIT31(cpu->R[REG_NUM(i, 3)]);
     cpu->R[REG_NUM(i, 0)] = 0;
     cpu->CPSR.bits.N = 0;
     cpu->CPSR.bits.Z = 1;
        
     return 2;
}

static u32 FASTCALL OP_LSR(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 v = (i>>6) & 0x1F;
     cpu->CPSR.bits.C = BIT_N(cpu->R[REG_NUM(i, 0)], v-1);
     cpu->R[REG_NUM(i, 0)] = (cpu->R[REG_NUM(i, 3)] >> v);
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
     
     return 2;
}

static u32 FASTCALL OP_ASR_0(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     cpu->CPSR.bits.C = BIT31(cpu->R[REG_NUM(i, 3)]);
     cpu->R[REG_NUM(i, 0)] = BIT31(cpu->R[REG_NUM(i, 3)])*0xFFFFFFFF;
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
     
     return 2;
}

static u32 FASTCALL OP_ASR(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 v = (i>>6) & 0x1F;
     cpu->CPSR.bits.C = BIT_N(cpu->R[REG_NUM(i, 3)], v-1);
     cpu->R[REG_NUM(i, 0)] = (((s32)cpu->R[REG_NUM(i, 3)]) >> v);
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
     
     return 2;
}

static u32 FASTCALL OP_ADD_REG(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 a = cpu->R[REG_NUM(i, 3)];
     u32 b = cpu->R[REG_NUM(i, 6)];
     cpu->R[REG_NUM(i, 0)] = a + b;
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
     cpu->CPSR.bits.C = UNSIGNED_OVERFLOW(a, b, cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.V = SIGNED_OVERFLOW(a, b, cpu->R[REG_NUM(i, 0)]);
     
     return 3;
}

static u32 FASTCALL OP_SUB_REG(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 a = cpu->R[REG_NUM(i, 3)];
     u32 b = cpu->R[REG_NUM(i, 6)];
     cpu->R[REG_NUM(i, 0)] = a - b;
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
     cpu->CPSR.bits.C = !UNSIGNED_UNDERFLOW(a, b, cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.V = SIGNED_UNDERFLOW(a, b, cpu->R[REG_NUM(i, 0)]);
     
     return 3;
}

static u32 FASTCALL OP_ADD_IMM3(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 a = cpu->R[REG_NUM(i, 3)];
     cpu->R[REG_NUM(i, 0)] = a + REG_NUM(i, 6);
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
     cpu->CPSR.bits.C = UNSIGNED_OVERFLOW(a, REG_NUM(i, 6), cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.V = SIGNED_OVERFLOW(a, REG_NUM(i, 6), cpu->R[REG_NUM(i, 0)]);
     
     return 2;
}

static u32 FASTCALL OP_SUB_IMM3(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 a = cpu->R[REG_NUM(i, 3)];
     cpu->R[REG_NUM(i, 0)] = a - REG_NUM(i, 6);
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
     cpu->CPSR.bits.C = !UNSIGNED_UNDERFLOW(a, REG_NUM(i, 6), cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.V = SIGNED_UNDERFLOW(a, REG_NUM(i, 6), cpu->R[REG_NUM(i, 0)]);
     
     return 2;
}

static u32 FASTCALL OP_MOV_IMM8(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     cpu->R[REG_NUM(i, 8)] = i & 0xFF;
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 8)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 8)] == 0;
     
     return 2;
}

static u32 FASTCALL OP_CMP_IMM8(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 tmp = cpu->R[REG_NUM(i, 8)] - (i & 0xFF);
     cpu->CPSR.bits.N = BIT31(tmp);
     cpu->CPSR.bits.Z = tmp == 0;
     cpu->CPSR.bits.C = !UNSIGNED_UNDERFLOW(cpu->R[REG_NUM(i, 8)], (i & 0xFF), tmp);
     cpu->CPSR.bits.V = SIGNED_UNDERFLOW(cpu->R[REG_NUM(i, 8)], (i & 0xFF), tmp);
     
     return 2;
}

static u32 FASTCALL OP_ADD_IMM8(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 tmp = cpu->R[REG_NUM(i, 8)] + (i & 0xFF);
     cpu->CPSR.bits.N = BIT31(tmp);
     cpu->CPSR.bits.Z = tmp == 0;
     cpu->CPSR.bits.C = UNSIGNED_OVERFLOW(cpu->R[REG_NUM(i, 8)], (i & 0xFF), tmp);
     cpu->CPSR.bits.V = SIGNED_OVERFLOW(cpu->R[REG_NUM(i, 8)], (i & 0xFF), tmp);
     cpu->R[REG_NUM(i, 8)] = tmp;
     
     return 2;
}

static u32 FASTCALL OP_SUB_IMM8(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 tmp = cpu->R[REG_NUM(i, 8)] - (i & 0xFF);
     cpu->CPSR.bits.N = BIT31(tmp);
     cpu->CPSR.bits.Z = tmp == 0;
     cpu->CPSR.bits.C = !UNSIGNED_UNDERFLOW(cpu->R[REG_NUM(i, 8)], (i & 0xFF), tmp);
     cpu->CPSR.bits.V = SIGNED_UNDERFLOW(cpu->R[REG_NUM(i, 8)], (i & 0xFF), tmp);
     cpu->R[REG_NUM(i, 8)] = tmp;
     
     return 2;
}

static u32 FASTCALL OP_AND(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     cpu->R[REG_NUM(i, 0)] &= cpu->R[REG_NUM(i, 3)];
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
     
     return 3;
}

static u32 FASTCALL OP_EOR(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     cpu->R[REG_NUM(i, 0)] ^= cpu->R[REG_NUM(i, 3)];
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
     
     return 3;
}

static u32 FASTCALL OP_LSL_REG(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 v = cpu->R[REG_NUM(i, 3)]&0xFF;
     
     if(!v)
     {
          cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
          cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
          return 3;
     }     
     if(v<32)
     {
          cpu->CPSR.bits.C = BIT_N(cpu->R[REG_NUM(i, 0)], 32-v);
          cpu->R[REG_NUM(i, 0)] <<= v;
          cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
          cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
          return 3;
     }
     if(v==32)
          cpu->CPSR.bits.C = BIT0(cpu->R[REG_NUM(i, 0)]);
     else
          cpu->CPSR.bits.C = 0;
     cpu->R[REG_NUM(i, 0)] = 0;
     cpu->CPSR.bits.N = 0;
     cpu->CPSR.bits.Z = 1;
     
     return 3;
}

static u32 FASTCALL OP_LSR_REG(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 v = cpu->R[REG_NUM(i, 3)]&0xFF;
     
     if(!v)
     {
          cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
          cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
          return 3;
     }     
     if(v<32)
     {
          cpu->CPSR.bits.C = BIT_N(cpu->R[REG_NUM(i, 0)], v-1);
          cpu->R[REG_NUM(i, 0)] >>= v;
          cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
          cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
          return 3;
     }
     if(v==32)
          cpu->CPSR.bits.C = BIT31(cpu->R[REG_NUM(i, 0)]);
     else
          cpu->CPSR.bits.C = 0;
     cpu->R[REG_NUM(i, 0)] = 0;
     cpu->CPSR.bits.N = 0;
     cpu->CPSR.bits.Z = 1;
     
     return 3;
}

static u32 FASTCALL OP_ASR_REG(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 v = cpu->R[REG_NUM(i, 3)]&0xFF;
     
     if(!v)
     {
          cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
          cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
          return 3;
     }     
     if(v<32)
     {
          cpu->CPSR.bits.C = BIT_N(cpu->R[REG_NUM(i, 0)], v-1);
          cpu->R[REG_NUM(i, 0)] = (u32)(((s32)cpu->R[REG_NUM(i, 0)]) >> v);
          cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
          cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
          return 3;
     }
     
     cpu->CPSR.bits.C = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->R[REG_NUM(i, 0)] = BIT31(cpu->R[REG_NUM(i, 0)])*0xFFFFFFFF;
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
     
     return 3;
}

static u32 FASTCALL OP_ADC_REG(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 a = cpu->R[REG_NUM(i, 0)];
     u32 b = cpu->R[REG_NUM(i, 3)];
     u32 tmp = b + cpu->CPSR.bits.C;
     u32 res = a + tmp;

     cpu->R[REG_NUM(i, 0)] = res;
     
     cpu->CPSR.bits.N = BIT31(res);
     cpu->CPSR.bits.Z = res == 0;
     
     cpu->CPSR.bits.C = UNSIGNED_OVERFLOW(b, cpu->CPSR.bits.C, tmp) | UNSIGNED_OVERFLOW(tmp, a, res);
     cpu->CPSR.bits.V = SIGNED_OVERFLOW(b, cpu->CPSR.bits.C, tmp) | SIGNED_OVERFLOW(tmp, a, res);
     
     return 3;
}

static u32 FASTCALL OP_SBC_REG(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 a = cpu->R[REG_NUM(i, 0)];
     u32 b = cpu->R[REG_NUM(i, 3)];
     u32 tmp = a - (!cpu->CPSR.bits.C);
     u32 res = tmp - b;
     cpu->R[REG_NUM(i, 0)] = res;
     
     cpu->CPSR.bits.N = BIT31(res);
     cpu->CPSR.bits.Z = res == 0;
     
     cpu->CPSR.bits.C = (!UNSIGNED_UNDERFLOW(a, !cpu->CPSR.bits.C, tmp)) & (!UNSIGNED_OVERFLOW(tmp, b, res));
     cpu->CPSR.bits.V = SIGNED_UNDERFLOW(a, !cpu->CPSR.bits.C, tmp) | SIGNED_OVERFLOW(tmp, b, res);
     
     return 3;
}

static u32 FASTCALL OP_ROR_REG(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 v = cpu->R[REG_NUM(i, 3)]&0xFF;
     
     if(v == 0)
     {
               cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
               cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
               return 3;
     }
     v &= 0xF;
     if(v == 0)
     {
               cpu->CPSR.bits.C = BIT31(cpu->R[REG_NUM(i, 0)]);
               cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
               cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
               return 3;
     }
     cpu->CPSR.bits.C = BIT_N(cpu->R[REG_NUM(i, 0)], v-1);
     cpu->R[REG_NUM(i, 0)] = ROR(cpu->R[REG_NUM(i, 0)], v);
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
     
     return 3;
}

static u32 FASTCALL OP_TST(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 tmp = cpu->R[REG_NUM(i, 0)] & cpu->R[REG_NUM(i, 3)];
     cpu->CPSR.bits.N = BIT31(tmp);
     cpu->CPSR.bits.Z = tmp == 0;
     
     return 3;
}

static u32 FASTCALL OP_NEG(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 a = cpu->R[REG_NUM(i, 3)];
     cpu->R[REG_NUM(i, 0)] = -((signed int)a);
     
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
     cpu->CPSR.bits.C = !UNSIGNED_UNDERFLOW(0, a, cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.V = SIGNED_UNDERFLOW(0, a, cpu->R[REG_NUM(i, 0)]);
     
     return 3;
}

static u32 FASTCALL OP_CMP(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 tmp = cpu->R[REG_NUM(i, 0)] -cpu->R[REG_NUM(i, 3)];
     
     cpu->CPSR.bits.N = BIT31(tmp);
     cpu->CPSR.bits.Z = tmp == 0;
     cpu->CPSR.bits.C = !UNSIGNED_UNDERFLOW(cpu->R[REG_NUM(i, 0)], cpu->R[REG_NUM(i, 3)], tmp);
     cpu->CPSR.bits.V = SIGNED_UNDERFLOW(cpu->R[REG_NUM(i, 0)], cpu->R[REG_NUM(i, 3)], tmp);
     
     return 3;
}

static u32 FASTCALL OP_CMN(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 tmp = cpu->R[REG_NUM(i, 0)] + cpu->R[REG_NUM(i, 3)];
     
     //execute = FALSE;
     //log::ajouter("OP_CMN THUMB");
     cpu->CPSR.bits.N = BIT31(tmp);
     cpu->CPSR.bits.Z = tmp == 0;
     cpu->CPSR.bits.C = UNSIGNED_OVERFLOW(cpu->R[REG_NUM(i, 0)], cpu->R[REG_NUM(i, 3)], tmp);
     cpu->CPSR.bits.V = SIGNED_OVERFLOW(cpu->R[REG_NUM(i, 0)], cpu->R[REG_NUM(i, 3)], tmp);
     
     return 3;
}

static u32 FASTCALL OP_ORR(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     cpu->R[REG_NUM(i, 0)] |= cpu->R[REG_NUM(i, 3)];
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
     
     return 3;
}

static u32 FASTCALL OP_MUL_REG(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     cpu->R[REG_NUM(i, 0)] *= cpu->R[REG_NUM(i, 3)];
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
     
     return 3;
}

static u32 FASTCALL OP_BIC(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     cpu->R[REG_NUM(i, 0)] &= (~cpu->R[REG_NUM(i, 3)]);
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
     
     return 3;
}

static u32 FASTCALL OP_MVN(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     cpu->R[REG_NUM(i, 0)] = (~cpu->R[REG_NUM(i, 3)]);
     cpu->CPSR.bits.N = BIT31(cpu->R[REG_NUM(i, 0)]);
     cpu->CPSR.bits.Z = cpu->R[REG_NUM(i, 0)] == 0;
     
     return 3;
}

static u32 FASTCALL OP_ADD_SPE(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 Rd = (i&7) | ((i>>4)&8);
     cpu->R[Rd] += cpu->R[REG_POS(i, 3)];
     
     if(Rd==15)
          cpu->next_instruction = cpu->R[15];
          
     return 2;
}

static u32 FASTCALL OP_CMP_SPE(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 Rn = (i&7) | ((i>>4)&8);
     u32 tmp = cpu->R[Rn] -cpu->R[REG_POS(i, 3)];
     
     cpu->CPSR.bits.N = BIT31(tmp);
     cpu->CPSR.bits.Z = tmp == 0;
     cpu->CPSR.bits.C = !UNSIGNED_UNDERFLOW(cpu->R[Rn], cpu->R[REG_POS(i, 3)], tmp);
     cpu->CPSR.bits.V = SIGNED_UNDERFLOW(cpu->R[Rn], cpu->R[REG_POS(i, 3)], tmp);
     
     return 3;
}

static u32 FASTCALL OP_MOV_SPE(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 Rd = (i&7) | ((i>>4)&8);
     cpu->R[Rd] = cpu->R[REG_POS(i, 3)];
     
     if(Rd==15)
          cpu->next_instruction = cpu->R[15];
          
     return 2;
}

static u32 FASTCALL OP_BX_THUMB(armcpu_t *cpu)
{
     u32 Rm = cpu->R[REG_POS(cpu->instruction, 3)];
     
     cpu->CPSR.bits.T = BIT0(Rm);
     cpu->R[15] = (Rm & 0xFFFFFFFE);
     cpu->next_instruction = cpu->R[15];
     
     return 3;
}

static u32 FASTCALL OP_BLX_THUMB(armcpu_t *cpu)
{
     u32 Rm = cpu->R[REG_POS(cpu->instruction, 3)];
     
     cpu->CPSR.bits.T = BIT0(Rm);
     cpu->R[14] = cpu->next_instruction | 1;
     cpu->R[15] = (Rm & 0xFFFFFFFE);
     cpu->next_instruction = cpu->R[15];
     
     return 3;
}

static u32 FASTCALL OP_LDR_PCREL(armcpu_t *cpu)
{
      u32 adr = (cpu->R[15]&0xFFFFFFFC) + ((cpu->instruction&0xFF)<<2);
     
    cpu->R[REG_NUM(cpu->instruction, 8)] = MMU_readWord(cpu->proc_ID, adr);
               
    return 3 + MMU.MMU_WAIT32[cpu->proc_ID][(adr>>24)&0xF];
}

static u32 FASTCALL OP_STR_REG_OFF(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[REG_NUM(i, 6)] + cpu->R[REG_NUM(i, 3)];
     MMU_writeWord(cpu->proc_ID, adr, cpu->R[REG_NUM(i, 0)]);
               
     return 2 + MMU.MMU_WAIT32[cpu->proc_ID][(adr>>24)&0xF];
}

static u32 FASTCALL OP_STRH_REG_OFF(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[REG_NUM(i, 3)] + cpu->R[REG_NUM(i, 6)];
     MMU_writeHWord(cpu->proc_ID, adr, ((u16)cpu->R[REG_NUM(i, 0)]));
               
     return 2 + MMU.MMU_WAIT16[cpu->proc_ID][(adr>>24)&0xF];
}

static u32 FASTCALL OP_STRB_REG_OFF(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[REG_NUM(i, 3)] + cpu->R[REG_NUM(i, 6)];
     MMU_writeByte(cpu->proc_ID, adr, ((u8)cpu->R[REG_NUM(i, 0)]));
               
     return 2 + MMU.MMU_WAIT16[cpu->proc_ID][(adr>>24)&0xF];
}

static u32 FASTCALL OP_LDRSB_REG_OFF(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[REG_NUM(i, 3)] + cpu->R[REG_NUM(i, 6)];
     cpu->R[REG_NUM(i, 0)] = (s32)((s8)MMU_readByte(cpu->proc_ID, adr));
               
     return 3 + MMU.MMU_WAIT16[cpu->proc_ID][(adr>>24)&0xF];
}

static u32 FASTCALL OP_LDR_REG_OFF(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = (cpu->R[REG_NUM(i, 3)] + cpu->R[REG_NUM(i, 6)]);
       u32 tempValue = MMU_readWord(cpu->proc_ID, adr&0xFFFFFFFC);

       adr = (adr&3)*8;
       tempValue = (tempValue>>adr) | (tempValue<<(32-adr));
       cpu->R[REG_NUM(i, 0)] = tempValue;
               
     return 3 + MMU.MMU_WAIT32[cpu->proc_ID][(adr>>24)&0xF];
}

static u32 FASTCALL OP_LDRH_REG_OFF(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[REG_NUM(i, 3)] + cpu->R[REG_NUM(i, 6)];
     cpu->R[REG_NUM(i, 0)] = (u32)MMU_readHWord(cpu->proc_ID, adr);
               
     return 3 + MMU.MMU_WAIT16[cpu->proc_ID][(adr>>24)&0xF];
}

static u32 FASTCALL OP_LDRB_REG_OFF(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[REG_NUM(i, 3)] + cpu->R[REG_NUM(i, 6)];
     cpu->R[REG_NUM(i, 0)] = (u32)MMU_readByte(cpu->proc_ID, adr);
               
     return 3 + MMU.MMU_WAIT16[cpu->proc_ID][(adr>>24)&0xF];
}

static u32 FASTCALL OP_LDRSH_REG_OFF(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[REG_NUM(i, 3)] + cpu->R[REG_NUM(i, 6)];
     cpu->R[REG_NUM(i, 0)] = (s32)((s16)MMU_readHWord(cpu->proc_ID, adr));
               
     return 3 + MMU.MMU_WAIT16[cpu->proc_ID][(adr>>24)&0xF];
}

static u32 FASTCALL OP_STR_IMM_OFF(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[REG_NUM(i, 3)] + ((i>>4)&0x7C);
     MMU_writeWord(cpu->proc_ID, adr, cpu->R[REG_NUM(i, 0)]);
               
     return 2 + MMU.MMU_WAIT32[cpu->proc_ID][(adr>>24)&0xF];
}

static u32 FASTCALL OP_LDR_IMM_OFF(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[REG_NUM(i, 3)] + ((i>>4)&0x7C);
     u32 tempValue = MMU_readWord(cpu->proc_ID, adr&0xFFFFFFFC);
       adr = (adr&3)*8;
       tempValue = (tempValue>>adr) | (tempValue<<(32-adr));
       cpu->R[REG_NUM(i, 0)] = tempValue;
               
     return 3 + MMU.MMU_WAIT32[cpu->proc_ID][(adr>>24)&0xF];
}

static u32 FASTCALL OP_STRB_IMM_OFF(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[REG_NUM(i, 3)] + ((i>>6)&0x1F);
     MMU_writeByte(cpu->proc_ID, adr, (u8)cpu->R[REG_NUM(i, 0)]);
               
     return 2 + MMU.MMU_WAIT16[cpu->proc_ID][(adr>>24)&0xF];
}

static u32 FASTCALL OP_LDRB_IMM_OFF(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[REG_NUM(i, 3)] + ((i>>6)&0x1F);
     cpu->R[REG_NUM(i, 0)] = MMU_readByte(cpu->proc_ID, adr);
               
     return 3 + MMU.MMU_WAIT16[cpu->proc_ID][(adr>>24)&0xF];
}

static u32 FASTCALL OP_STRH_IMM_OFF(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[REG_NUM(i, 3)] + ((i>>5)&0x3E);
     MMU_writeHWord(cpu->proc_ID, adr, (u16)cpu->R[REG_NUM(i, 0)]);
               
     return 2 + MMU.MMU_WAIT16[cpu->proc_ID][(adr>>24)&0xF];
}

static u32 FASTCALL OP_LDRH_IMM_OFF(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[REG_NUM(i, 3)] + ((i>>5)&0x3E);
     cpu->R[REG_NUM(i, 0)] = MMU_readHWord(cpu->proc_ID, adr);
               
     return 3 + MMU.MMU_WAIT16[cpu->proc_ID][(adr>>24)&0xF];
}

static u32 FASTCALL OP_STR_SPREL(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[13] + ((i&0xFF)<<2);
     MMU_writeWord(cpu->proc_ID, adr, cpu->R[REG_NUM(i, 8)]);
               
     return 2 + MMU.MMU_WAIT16[cpu->proc_ID][(adr>>24)&0xF];
}

static u32 FASTCALL OP_LDR_SPREL(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[13] + ((i&0xFF)<<2);
       cpu->R[REG_NUM(i, 8)] = MMU_readWord(cpu->proc_ID, adr);
               
     return 3 + MMU.MMU_WAIT32[cpu->proc_ID][(adr>>24)&0xF];
}

static u32 FASTCALL OP_ADD_2PC(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     cpu->R[REG_NUM(i, 8)] = (cpu->R[15]&0xFFFFFFFC) + ((i&0xFF)<<2);
               
     return 5;
}

static u32 FASTCALL OP_ADD_2SP(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     cpu->R[REG_NUM(i, 8)] = cpu->R[13] + ((i&0xFF)<<2);
     
     return 2;
}

static u32 FASTCALL OP_ADJUST_P_SP(armcpu_t *cpu)
{
     cpu->R[13] += ((cpu->instruction&0x7F)<<2);
     
     return 1;
}

static u32 FASTCALL OP_ADJUST_M_SP(armcpu_t *cpu)
{
     cpu->R[13] -= ((cpu->instruction&0x7F)<<2);
     
     return 1;
}

static u32 FASTCALL OP_PUSH(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[13] - 4;
     u32 c = 0, j;
     
     for(j = 0; j<8; ++j)
          if(BIT_N(i, 7-j))
          {
               MMU_writeWord(cpu->proc_ID, adr, cpu->R[7-j]);
               c += MMU.MMU_WAIT32[cpu->proc_ID][(adr>>24)&0xF];
               adr -= 4;
          }
     cpu->R[13] = adr + 4;
     
     return c + 3;
}

static u32 FASTCALL OP_PUSH_LR(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[13] - 4;
     u32 c = 0, j;
     
     MMU_writeWord(cpu->proc_ID, adr, cpu->R[14]);
     c += MMU.MMU_WAIT32[cpu->proc_ID][(adr>>24)&0xF];
     adr -= 4;
          
     for(j = 0; j<8; ++j)
          if(BIT_N(i, 7-j))
          {
               MMU_writeWord(cpu->proc_ID, adr, cpu->R[7-j]);
               c += MMU.MMU_WAIT32[cpu->proc_ID][(adr>>24)&0xF];
               adr -= 4;
          }
     cpu->R[13] = adr + 4;
     
     return c + 4;
}

static u32 FASTCALL OP_POP(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[13];
     u32 c = 0, j;

     for(j = 0; j<8; ++j)
          if(BIT_N(i, j))
          {
               cpu->R[j] = MMU_readWord(cpu->proc_ID, adr);
               c += MMU.MMU_WAIT32[cpu->proc_ID][(adr>>24)&0xF];
               adr += 4;
          }
     cpu->R[13] = adr;       
     
     return c + 2;
}

static u32 FASTCALL OP_POP_PC(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[13];
     u32 c = 0, j;
     u32 v;

     for(j = 0; j<8; ++j)
          if(BIT_N(i, j))
          {
               cpu->R[j] = MMU_readWord(cpu->proc_ID, adr);
               c += MMU.MMU_WAIT32[cpu->proc_ID][(adr>>24)&0xF];
               adr += 4;
          }

     v = MMU_readWord(cpu->proc_ID, adr);
     c += MMU.MMU_WAIT32[cpu->proc_ID][(adr>>24)&0xF];
     cpu->R[15] = v & 0xFFFFFFFE;
     cpu->next_instruction = v & 0xFFFFFFFE;
     if(cpu->proc_ID==0)
          cpu->CPSR.bits.T = BIT0(v);
     adr += 4;

     cpu->R[13] = adr;   
     return c + 5;    
}

static u32 FASTCALL OP_BKPT_THUMB(armcpu_t *cpu)
{
     return 1;
}

static u32 FASTCALL OP_STMIA_THUMB(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[REG_NUM(i, 8)];
     u32 c = 0, j;

     for(j = 0; j<8; ++j)
          if(BIT_N(i, j))
          {
               MMU_writeWord(cpu->proc_ID, adr, cpu->R[j]);
               c += MMU.MMU_WAIT32[cpu->proc_ID][(adr>>24)&0xF];
               adr += 4;
          }
     cpu->R[REG_NUM(i, 8)] = adr;
     return c + 2;
}

static u32 FASTCALL OP_LDMIA_THUMB(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     u32 adr = cpu->R[REG_NUM(i, 8)];
     u32 c = 0, j;

     for(j = 0; j<8; ++j)
          if(BIT_N(i, j))
          {
               cpu->R[j] = MMU_readWord(cpu->proc_ID, adr);
               c += MMU.MMU_WAIT32[cpu->proc_ID][(adr>>24)&0xF];
               adr += 4;
          }
     cpu->R[REG_NUM(i, 8)] = adr;
     return c + 3;
}

static u32 FASTCALL OP_B_COND(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     if(!TEST_COND((i>>8)&0xF, cpu->CPSR))
          return 1;
     
     cpu->R[15] += ((s32)((s8)(i&0xFF)))<<1;
     cpu->next_instruction = cpu->R[15];
     return 3;
}

static u32 FASTCALL OP_SWI_THUMB(armcpu_t *cpu)
{
     if (((cpu->intVector != 0) ^ (cpu->proc_ID == ARMCPU_ARM9)))
     {
        /* we use an irq thats not in the irq tab, as
        it was replaced duie to a changed intVector */
        Status_Reg tmp = cpu->CPSR;
        armcpu_switchMode(cpu, SVC);            /* enter svc mode */
        cpu->R[14] = cpu->R[15] - 4;            /* jump to swi Vector */
        cpu->SPSR = tmp;                        /* save old CPSR as new SPSR */
        cpu->CPSR.bits.T = 0;                   /* handle as ARM32 code */
        cpu->CPSR.bits.I = cpu->SPSR.bits.I;    /* keep int disable flag */
        cpu->R[15] = cpu->intVector + 0x08;
        cpu->next_instruction = cpu->R[15];
        return 3;
     }
     else
     {
        u32 swinum = cpu->instruction & 0xFF;
        return cpu->swi_tab[swinum](cpu) + 3;  
     }
     //return 3;
}

#define SIGNEEXT_IMM11(i)     (((i)&0x7FF) | (BIT10(i) * 0xFFFFF800))

static u32 FASTCALL OP_B_UNCOND(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     cpu->R[15] += (SIGNEEXT_IMM11(i)<<1);
     cpu->next_instruction = cpu->R[15];
     return 3;
}
 
static u32 FASTCALL OP_BLX(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     cpu->R[15] = (cpu->R[14] + ((i&0x7FF)<<1))&0xFFFFFFFC;
     cpu->R[14] = cpu->next_instruction | 1;
     cpu->next_instruction = cpu->R[15];
     cpu->CPSR.bits.T = 0;
     return 3;
}

static u32 FASTCALL OP_BL_10(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     cpu->R[14] = cpu->R[15] + (SIGNEEXT_IMM11(i)<<12);
     return 1;
}

static u32 FASTCALL OP_BL_THUMB(armcpu_t *cpu)
{
     u32 i = cpu->instruction;
     cpu->R[15] = (cpu->R[14] + ((i&0x7FF)<<1));
     cpu->R[14] = cpu->next_instruction | 1;
     cpu->next_instruction = cpu->R[15];
     return 3;
}

#define TYPE_RETOUR u32
#define CALLTYPE FASTCALL 
#define PARAMETRES  armcpu_t *cpu
#define NOM_THUMB_TAB     thumb_instructions_set

#include "thumb_tabdef.inc"

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