Question No: $02$

To perform the return from function call, implement jrrs instruction $($jump to register rs $)$ in the single$-$cycle datapath shown below. The format of jr instruction is shown below.

Show what changes are needed to support jr instruction. You should only add wires and muxes to the datapath; do not modify the main functional units themselves $($the memory, register file and ALU$).$ Your solution should not lengthen the clock cycle. Assume that the ALU, Memory and Register file all take $2$ ns $,$ and everything else is instantaneous.

Draw a similar diagram as shown below on your answer sheet and mark on the diagram the changes required for implementation of jr$.$ Also in the diagram write $($next to the signal's name$)$ values of all non$-0$ control signals required for the jr instruction. ALU$).$ Your solution should not lengthen the clock cycle. Assume that the ALU, Memory and Register file all take $2$ ns $,$ and everything else is instantaneous.

Draw a similar diagram as shown below on your answer sheet and mark on the diagram the changes required for implementation of j$.$ Also in the diagram write $($next to the signal's name$)$ values of all non$-0$ control signals required for the ir instruction.