Dividing EX stage of a pipeline into EX1 and EX2 stages
This is multi-cycle processor, where each stage takes a single clock cycle. The text suggest that the new MEM stage should take 2 clock cycles. Then, it can be seen as splitting this 2-cycle stage into 2 separate 1-cycle stages which we can call MEM1 and MEM2 respectively.
There is no new input. You only need to make sure that the &quot;right&quot; input travels along the pipeline and reaches the right stage at every time.