Forwarding Unit: Alu Mux

inputs:

Rdst here is (Rdst Ex, Rdst Mem1, Rdst Mem2) Rdst == Rsrc1 or Rdst == Rsrc2 first enable
RegWrite is like second Enable

Decode Buffer: Rsrc1, Rsrc2
Execute Buffer: Rdst, RdstVal, RegWrite
Memory-1 Buffer: Rdst, RdstVal, MemRead, RegWrite
Memory-2 Buffer: Rdst, RdstVal, RegWrite

outputs:

Selector for ALU MUX
Data for ALU MUX

Hazard Detection Unit:

How to stall?
when to stall

PC:

Handle PC changes

Handle Reset:

reset pc to value in memory

Handle interrupt

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