6.20 [20] <§§6.4, 6.5> Consider an instruction sequence used for a memory-tomemory

copy:

lw $2, 100($5)

sw $2, 200($6)

The elaboration starting on page 412 of the text discusses this situation and

states that additional forwarding hardware can improve its performance. Show

the necessary additions to the datapath of Figure 6.33 to allow code like this to run

without stalling. Include forwarding equations (such as the ones appearing on

pages 407–411) for all of the control signals for any new or modified multiplexors

in your datapath. Finally, rewrite the stall formula on page 413 so that this code

sequence won’t stall.