public void ReadFunction(uint RAMAddr, uint RAMtoROM, ref StructList <Instruction> instructions)
{
instructions.Clear();
Instruction cur;
ROM rom = ROM.Instance;
uint ROM_OFFSET = RAMAddr - RAMtoROM;
uint offset = ROM_OFFSET;
int end = 0x8000;
while (end > 0)
{
cur = parseInstruction(rom.readWordUnsigned(offset));
offset += 4;
end--;
if (cur.opCode == OPCODE.JR && cur.gp_1 == GP_REGISTER.RA)
{
end = 1;
}
instructions.Add(ref cur);
}
}
public void findJALsInFunction(uint RAMFunc, uint RAMtoROM, ref StructList <JAL_CALL> calls)
{
calls.Clear();
StructList <Instruction> inst_list = new StructList <Instruction>();
Instruction inst = default(Instruction);
ReadFunction(RAMFunc, RAMtoROM, ref inst_list);
JAL_CALL jal = default(JAL_CALL);
bool addNextTime = false;
while (inst_list.Dequeue(ref inst))
{
bool addJAL = addNextTime;
switch (inst.opCode)
{
case OPCODE.LUI:
if (inst.gp_dest == GP_REGISTER.A0)
{
jal.a0 = (uint)(inst.immediate << 16);
}
else if (inst.gp_dest == GP_REGISTER.A1)
{
jal.a1 = (uint)(inst.immediate << 16);
}
else if (inst.gp_dest == GP_REGISTER.A2)
{
jal.a2 = (uint)(inst.immediate << 16);
}
else if (inst.gp_dest == GP_REGISTER.A3)
{
jal.a3 = (uint)(inst.immediate << 16);
}
break;
case OPCODE.ADDIU:
if (inst.gp_dest == GP_REGISTER.A0 && inst.gp_1 == GP_REGISTER.A0)
{
jal.a0 += (uint)inst.immediate;
}
else if (inst.gp_dest == GP_REGISTER.A1 && inst.gp_1 == GP_REGISTER.A1)
{
jal.a1 += (uint)inst.immediate;
}
else if (inst.gp_dest == GP_REGISTER.A2 && inst.gp_1 == GP_REGISTER.A2)
{
jal.a2 += (uint)inst.immediate;
}
else if (inst.gp_dest == GP_REGISTER.A3 && inst.gp_1 == GP_REGISTER.A3)
{
jal.a3 += (uint)inst.immediate;
}
else if (inst.gp_dest == GP_REGISTER.A0 && inst.gp_1 == GP_REGISTER.R0)
{
jal.a0 = (uint)inst.immediate;
}
else if (inst.gp_dest == GP_REGISTER.A1 && inst.gp_1 == GP_REGISTER.R0)
{
jal.a1 = (uint)inst.immediate;
}
else if (inst.gp_dest == GP_REGISTER.A2 && inst.gp_1 == GP_REGISTER.R0)
{
jal.a2 = (uint)inst.immediate;
}
else if (inst.gp_dest == GP_REGISTER.A3 && inst.gp_1 == GP_REGISTER.R0)
{
jal.a3 = (uint)inst.immediate;
}
break;
case OPCODE.ORI:
if (inst.gp_dest == GP_REGISTER.A0 && inst.gp_1 == GP_REGISTER.A0)
{
jal.a0 |= (ushort)inst.immediate;
}
else if (inst.gp_dest == GP_REGISTER.A1 && inst.gp_1 == GP_REGISTER.A1)
{
jal.a1 |= (ushort)inst.immediate;
}
else if (inst.gp_dest == GP_REGISTER.A2 && inst.gp_1 == GP_REGISTER.A2)
{
jal.a2 |= (ushort)inst.immediate;
}
else if (inst.gp_dest == GP_REGISTER.A3 && inst.gp_1 == GP_REGISTER.A3)
{
jal.a3 |= (ushort)inst.immediate;
}
else if (inst.gp_dest == GP_REGISTER.A0 && inst.gp_1 == GP_REGISTER.R0)
{
jal.a0 = (uint)inst.immediate;
}
else if (inst.gp_dest == GP_REGISTER.A1 && inst.gp_1 == GP_REGISTER.R0)
{
jal.a1 = (uint)inst.immediate;
}
else if (inst.gp_dest == GP_REGISTER.A2 && inst.gp_1 == GP_REGISTER.R0)
{
jal.a2 = (uint)inst.immediate;
}
else if (inst.gp_dest == GP_REGISTER.A3 && inst.gp_1 == GP_REGISTER.R0)
{
jal.a3 = (uint)inst.immediate;
}
break;
case OPCODE.JAL:
jal.JAL_ADDRESS = inst.jump_to_func;
addNextTime = true;
break;
}
if (addJAL)
{
calls.Add(ref jal);
//Console.WriteLine(newCall.ToString());
addNextTime = false;
}
}
}