private void WriteBack()
{
if (PipelineRegistersList.MEMWB.Count == 0)
{
foreach (DataGridViewRow row in PipelineRegistersDataGridView.Rows)
{
if (row.Cells["Register"].Value.ToString() != "MEM/WB")
{
continue;
}
PipelineRegistersDataGridView[1, row.Index].Value = "-";
return;
}
}
var opCode = PipelineRegistersList.MEMWB.Dequeue();
ControlUnit.SetAluControls(opCode.ToString());
Muxs.MemToRegMux = new uint[2];
Muxs.MemToRegMux[1] = uint.Parse(PipelineRegistersList.MEMWB.Dequeue().ToString());
Muxs.MemToRegMux[0] = uint.Parse(PipelineRegistersList.MEMWB.Dequeue().ToString());
RegisterFile.WriteData = Muxs.GetMemToRegMuxVal(ControlUnit.MemToReg);
RegisterFile.WriteRegister = uint.Parse(PipelineRegistersList.MEMWB.Dequeue().ToString());
if (ControlUnit.RegWrite != 1)
{
return;
}
{
RegisterFile.PerformRegisterWrite();
foreach (DataGridViewRow row in MipsRegistersDataGrid.Rows)
{
if (row.Cells["Register"].Value.ToString() != string.Concat("$", RegisterFile.WriteRegister.ToString()))
{
continue;
}
MipsRegistersDataGrid[1, row.Index].Value = RegisterFile.WriteData;
var dt = (DataTable)MipsRegistersDataGrid.DataSource;
MipsRegisters = GetDict(dt);
break;
}
}
}
private void Execute()
{
if (PipelineRegistersList.IDEX.Count == 0)
{
foreach (DataGridViewRow row in PipelineRegistersDataGridView.Rows)
{
if (row.Cells["Register"].Value.ToString() != "ID/EX")
{
continue;
}
PipelineRegistersDataGridView[1, row.Index].Value = "-";
return;
}
}
var opCode = PipelineRegistersList.IDEX.Dequeue();
ControlUnit.SetAluControls(opCode.ToString());
var readDataOne = PipelineRegistersList.IDEX.Dequeue();
var readDataTwo = PipelineRegistersList.IDEX.Dequeue();
var signExtension = PipelineRegistersList.IDEX.Dequeue();
var rt = PipelineRegistersList.IDEX.Dequeue();
var rd = PipelineRegistersList.IDEX.Dequeue();
Muxs.AluSrcMux = new uint[2];
Muxs.AluSrcMux[0] = uint.Parse(readDataTwo.ToString());
Muxs.AluSrcMux[1] = uint.Parse(signExtension.ToString());
var aluValueTwo = Muxs.GetAluSrcMuxVal(ControlUnit.AluSrc);
ALUControlBlock.ComputeOperation();
// Perform ALU Operation
ALU.ValueOne = (uint)readDataOne;
ALU.ValueTwo = aluValueTwo;
ALU.Operation = ALUControlBlock.Operation;
ALU.ComputeResult();
Muxs.RegDstMux = new uint[2];
Muxs.RegDstMux[0] = (uint)rt;
Muxs.RegDstMux[1] = (uint)rd;
// Enqueue in EX/MEM
PipelineRegistersList.EXMEM.Enqueue(opCode);
PipelineRegistersList.EXMEM.Enqueue(ALU.Result);
PipelineRegistersList.EXMEM.Enqueue(readDataTwo);
PipelineRegistersList.EXMEM.Enqueue(Muxs.GetRegDstMuxVal(ControlUnit.RegDst));
// Add to Pipeline DataGridView
foreach (DataGridViewRow row in PipelineRegistersDataGridView.Rows)
{
if (row.Cells["Register"].Value.ToString() != "EX/MEM")
{
continue;
}
PipelineRegistersDataGridView[1, row.Index].Value = string.Concat(
ALU.Result.ToString(), "\n",
readDataTwo.ToString(), "\n",
Muxs.GetRegDstMuxVal(ControlUnit.RegDst).ToString());
break;
}
}