public float Compute(FloatingPointRegisters floatRegs, IntegerRegisters intRegs, int index)
{
float jVal = 0, kVal = 0;
// Get Operands.
if (Vj[index].opType == Operand.OperandType.FloatReg)
{
jVal = floatRegs.Get((int)Vj[index].opVal).value;
}
else if (Vj[index].opType == Operand.OperandType.IntReg)
{
jVal = intRegs.Get((int)Vj[index].opVal).value;
}
else if (Vj[index].opType == Operand.OperandType.Num)
{
jVal = Vj[index].opVal;
}
if (Vk[index].opType == Operand.OperandType.FloatReg)
{
kVal = floatRegs.Get((int)Vk[index].opVal).value;
}
else if (Vk[index].opType == Operand.OperandType.IntReg)
{
kVal = intRegs.Get((int)Vk[index].opVal).value;
}
else if (Vk[index].opType == Operand.OperandType.Num)
{
kVal = Vk[index].opVal;
}
// Compute Result
switch (opCodes[index])
{
case Instruction.Opcodes.ADDD:
return(jVal + kVal);
case Instruction.Opcodes.SUBD:
return(jVal - kVal);
case Instruction.Opcodes.MULD:
return(jVal * kVal);
case Instruction.Opcodes.DIVD:
return(jVal / kVal);
default:
return(0);
}
}
public void BufferValue(int index, FloatingPointRegisters fRegs, IntegerRegisters iRegs)
{
switch (dest[index].opType)
{
case Operand.OperandType.FloatReg:
if (fRegs.Get((int)dest[index].opVal).waitState == WaitInfo.WaitState.Avail)
{
results[index] = fRegs.Get((int)dest[index].opVal).value;
isReady[index] = true;
}
break;
case Operand.OperandType.IntReg:
if (iRegs.Get((int)dest[index].opVal).waitState == WaitInfo.WaitState.Avail)
{
results[index] = iRegs.Get((int)dest[index].opVal).value;
isReady[index] = true;
}
break;
default:
break;
}
}
private void UpdateFPRegisterBox()
{
fpRegisters.Clear();
fpRegisters.View = View.Details;
fpRegisters.Columns.Add("");
for (int i = 0; i < floatRegs.GetNumRegs(); i++)
{
fpRegisters.Columns.Add("F" + i.ToString());
}
ListViewItem row = new ListViewItem("FU");
for (int i = 0; i < floatRegs.GetNumRegs(); i++)
{
switch (floatRegs.Get(i).waitState)
{
case WaitInfo.WaitState.AddStation:
row.SubItems.Add("Add" + (floatRegs.Get(i).value + 1).ToString());
break;
case WaitInfo.WaitState.Avail:
row.SubItems.Add(floatRegs.Get(i).value.ToString());
break;
case WaitInfo.WaitState.Compute:
row.SubItems.Add(floatRegs.Get(i).value.ToString());
break;
case WaitInfo.WaitState.LoadStation:
row.SubItems.Add("Load" + (floatRegs.Get(i).value + 1).ToString());
break;
case WaitInfo.WaitState.MultStation:
row.SubItems.Add("Mult" + (floatRegs.Get(i).value + 1).ToString());
break;
case WaitInfo.WaitState.StoreStation:
row.SubItems.Add("Store" + (floatRegs.Get(i).value + 1).ToString());
break;
}
}
fpRegisters.Items.Add(row);
}
public float DetermineBranch(FloatingPointRegisters floatRegs, IntegerRegisters intRegs, int index)
{
float jVal = 0, kVal = 0;
// Get Operands.
if (Vj[index].opType == Operand.OperandType.FloatReg)
{
jVal = floatRegs.Get((int)Vj[index].opVal).value;
}
else if (Vj[index].opType == Operand.OperandType.IntReg)
{
jVal = intRegs.Get((int)Vj[index].opVal).value;
}
else if (Vj[index].opType == Operand.OperandType.Num)
{
jVal = Vj[index].opVal;
}
if (Vk[index].opType == Operand.OperandType.FloatReg)
{
kVal = floatRegs.Get((int)Vk[index].opVal).value;
}
else if (Vk[index].opType == Operand.OperandType.IntReg)
{
kVal = intRegs.Get((int)Vk[index].opVal).value;
}
else if (Vk[index].opType == Operand.OperandType.Num)
{
kVal = Vk[index].opVal;
}
switch (opCodes[index])
{
case Instruction.Opcodes.BEQ:
if (jVal == kVal)
{
return(dest[index].opVal);
}
else
{
return(0);
}
case Instruction.Opcodes.BGEZ:
return(0);
case Instruction.Opcodes.BLEZ:
return(0);
case Instruction.Opcodes.BNE:
if (jVal != kVal)
{
return(dest[index].opVal);
}
else
{
return(0);
}
default:
return(0);
}
}