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();
}
private void Issue()
{
// If empty.
if (instructionUnit.GetCurrentInstructions().Length == 0)
{
return;
}
int bufNum;
Instruction instruction = instructionUnit.PeekAtInstruction();
Operand jReg, kReg;
WaitInfo wsJ, wsK;
// Get Source Regs.
jReg = new Operand(instruction.j);
kReg = new Operand(instruction.k);
wsJ = FindRegister(instruction.j);
wsK = FindRegister(instruction.k);
switch (instruction.instType)
{
case Instruction.InstructionType.Add:
if ((bufNum = addStation.GetFreeBuffer()) != -1)
{
new Operand(instruction.j);
// Put in Reservation Station.
issuedInstructions.Add(instruction);
issueClocks[numIssued++] = clocks;
addStation.PutInBuffer(instructionUnit.GetInstruction(),
bufNum, jReg, kReg, wsJ, wsK);
addStation.instrNum[bufNum] = issuedInstructions.Count - 1;
// Set Dest Reg.
if (instruction.dest.Substring(0, 1) == "F")
{ // Float.
floatRegs.Set(WaitInfo.WaitState.AddStation, bufNum,
Int32.Parse(instruction.dest.Substring(1)));
}
else
{ // Int.
intRegs.Set(WaitInfo.WaitState.AddStation, bufNum,
Int32.Parse(instruction.dest.Substring(1)));
}
floatRegs.Set(WaitInfo.WaitState.AddStation, bufNum,
Int32.Parse(instruction.dest.Substring(1)));
}
else
{
Console.WriteLine("Stalling due to a structural hazard.");
}
break;
case Instruction.InstructionType.Multiply:
if ((bufNum = multiplyStation.GetFreeBuffer()) != -1)
{
// Issue.
issuedInstructions.Add(instruction);
issueClocks[numIssued++] = clocks;
multiplyStation.PutInBuffer(instructionUnit.GetInstruction(),
bufNum, jReg, kReg, wsJ, wsK);
multiplyStation.instrNum[bufNum] = issuedInstructions.Count - 1;
// Set Dest Reg.
if (instruction.dest.Substring(0, 1) == "F")
{
floatRegs.Set(WaitInfo.WaitState.MultStation, bufNum,
Int32.Parse(instruction.dest.Substring(1)));
}
else
{
intRegs.Set(WaitInfo.WaitState.MultStation, bufNum,
Int32.Parse(instruction.dest.Substring(1)));
}
}
else
{
Console.WriteLine("Stalling due to a structural hazard.");
}
break;
case Instruction.InstructionType.Load:
if ((bufNum = loadStation.GetFreeBuffer()) != -1)
{
// Issue.
issuedInstructions.Add(instruction);
issueClocks[numIssued++] = clocks;
loadStation.PutInBuffer(instructionUnit.GetInstruction(),
bufNum, jReg, kReg, wsJ, wsK);
loadStation.instrNum[bufNum] = issuedInstructions.Count - 1;
// Set Dest Reg.
if (instruction.dest.Substring(0, 1) == "F")
{
floatRegs.Set(WaitInfo.WaitState.LoadStation, bufNum,
Int32.Parse(instruction.dest.Substring(1)));
}
else
{
intRegs.Set(WaitInfo.WaitState.LoadStation, bufNum,
Int32.Parse(instruction.dest.Substring(1)));
}
}
else
{
Console.WriteLine("Stalling due to a structural hazard.");
}
break;
case Instruction.InstructionType.Store:
if ((bufNum = storeStation.GetFreeBuffer()) != -1)
{
// Issue.
issuedInstructions.Add(instruction);
issueClocks[numIssued++] = clocks;
storeStation.PutInBuffer(instructionUnit.GetInstruction(),
bufNum, jReg, kReg, wsJ, wsK);
storeStation.instrNum[bufNum] = issuedInstructions.Count - 1;
}
else
{
Console.WriteLine("Stalling due to a structural hazard.");
}
break;
case Instruction.InstructionType.Branch:
if ((bufNum = branchStation.GetFreeBuffer()) != -1)
{
// Issue.
issuedInstructions.Add(instruction);
issueClocks[numIssued++] = clocks;
branchStation.PutInBuffer(instructionUnit.GetInstruction(),
bufNum, jReg, kReg, wsJ, wsK);
branchStation.instrNum[bufNum] = issuedInstructions.Count - 1;
}
else
{
Console.WriteLine("Stalling due to a structural hazard.");
}
break;
}
}