Consider the execution of the following code segments in the MIPS multicycle datapath we developed in class. Assume branches take 3 cycles to complete.

Label: lw $t2, 0($t4) lw $t3, 4($t4) add $t5, $t2, $t3 sw $t5, 0($t6) addi $t4, 8 addi $t6, 4 bne $t6, $s0, Label

a) In what cycle does the actual comparison of $t6 and $s0 take place?

b) What exactly is happening during the 17^th and 18^th cycles of execution? Work out the values of the control signals relevant to this operation during the 17^th and 18^th cycles.