} // operation object to perform operations
public Instruction()
{
Disassembly d = new Disassembly();
ops = new Operation();
disasm = d;
}
//--------------------------------------------------------------
// Purpose: Performs an multiply instruction according to data in <instr>
// Returns: nothing
//--------------------------------------------------------------
public void MUL(Data instr, bool generateDisasm)
{
Memory registers = Computer.GetCPU().registers;
instr.disasm.instruction = "mul";
uint value = registers.ReadWord((uint)(instr.RM * 4)) * registers.ReadWord((uint)(instr.RS * 4));
if (generateDisasm)
{
instr.disasm.value = Disassembly.DataMul(instr);
}
else
{
Computer.GetCPU().registers.WriteWord((uint)(instr.RD * 4), value);
}
}
//--------------------------------------------------------------
// Purpose: Creates disassembly for data processing instructions and sets it
// Returns: Nothing
//--------------------------------------------------------------
private static void SetDataDisassembly(Data instr, uint value, bool isMov)
{
op2Type op2 = Operation.CheckOperand2(instr);
shiftType shift = Operation.CheckShiftType(instr);
if (isMov)
{
switch (op2)
{
case op2Type.imm:
instr.disasm.value = Disassembly.ImmMov(instr, value);
break;
case op2Type.reg_imm:
instr.disasm.value = Disassembly.RegImmMov(instr);
break;
case op2Type.reg_reg:
instr.disasm.value = Disassembly.RegRegMov(instr);
break;
}
}
else
{
switch (op2)
{
case op2Type.imm:
instr.disasm.value = Disassembly.ImmData(instr, value);
break;
case op2Type.reg_imm:
instr.disasm.value = Disassembly.RegImmData(instr);
break;
case op2Type.reg_reg:
instr.disasm.value = Disassembly.RegRegData(instr);
break;
}
}
}
