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 Init()
{
clocks = 0;
originalInstructions = instructionUnit.GetCurrentInstructions();
issueClocks = new int[100];
executeClocks = new int[100];
writeClocks = new int[100];
for (int i = 0; i < 100; i++)
{
issueClocks[i] = -1;
executeClocks[i] = -1;
writeClocks[i] = -1;
}
loadStation = new ReservationStation(3, ReservationStation.RSType.Load);
storeStation = new ReservationStation(3, ReservationStation.RSType.Store);
addStation = new ReservationStation(3, ReservationStation.RSType.Add);
multiplyStation = new ReservationStation(2, ReservationStation.RSType.Multiply);
branchStation = new ReservationStation(5, ReservationStation.RSType.Multiply);
floatRegs = new FloatingPointRegisters(30);
for (int i = 0; i < 30; i++)
{
floatRegs.Set(WaitInfo.WaitState.Avail, i + 1, i);
}
intRegs = new IntegerRegisters(30);
memLocs = new FloatingPointMemoryArrary(64);
for (int i = 0; i < 64; i++)
{
memLocs.Set(i + 1, i);
}
UpdateInstructionQueueBox();
UpdateIssuedInstructionsBox();
UpdateReservationStationBoxes();
UpdateFPRegisterBox();
UpdateIntRegisterBox();
UpdateClockCountBox();
}
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;
}
}
public int ComputeAddress(IntegerRegisters regs, int index)
{
int jVal = 0, kVal = 0;
if (Vj[index].opType == Operand.OperandType.IntReg)
{
jVal = (int)regs.Get((int)Vj[index].opVal).value;
}
else if (Vj[index].opType == Operand.OperandType.Num)
{
jVal = (int)Vj[index].opVal;
}
if (Vk[index].opType == Operand.OperandType.IntReg)
{
kVal = (int)regs.Get((int)Vk[index].opVal).value;
}
else if (Vk[index].opType == Operand.OperandType.Num)
{
kVal = (int)Vk[index].opVal;
}
return(jVal + kVal);
}
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);
}
}