Exercise 4 9 In this exercise we examine the operation of the single cycle datapath for a particular instruction Problems in this exercise refer to the following MIPS instruction Instruction a lw $1,40($6) b Label bne $1,$2,Label 4 9 1 10 4 4 What is the value of the instruction word 4 9 2 10 4 4 What is the register number supplied to the register fi les Read register 1 input Is this register actually read How about Read register 2 4 9 3 10 4 4 What is the register number supplied to the register fi les Write register input Is this register actually written Different instructions require different control signals to be asserted in the datapath The remaining problems in this exercise refer to the following two control signals from Figure 4 24 Control signal 1 Control signal 2 a RegDst MemRead b RegWrite MemRead 4 9 4 20 4 4 What is the value of these two signals for this instruction 4 9 5 20 4 4 For the datapath from Figure 4 24, draw the logic diagram for the part of the control unit that implements just the fi rst signal Assume that we only need to support lw, sw, beq, add, and j (jump) instructions 4 9 6 20 4 4 Repeat Exercise 4 9 5, but now implement both of these signals

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Exercise 4 9 In this exercise we examine the operation of the single cycle datapath for a particular instruction  Problems in this exercise refer to the following MIPS instruction  Instruction a  lw $1,40($6) b  Label  bne $1,$2,Label 4 9 1  10   4 4  What is the value of the instruction word  4 9 2  10   4 4  What is the register number supplied to the register fi les Read register 1 input  Is this register actually read  How about Read register 2  4 9 3  10   4 4  What is the register number supplied to the register fi les Write register input  Is this register actually written  Different instructions require different control signals to be asserted in the datapath  The remaining problems in this exercise refer to the following two control signals from Figure 4 24  Control signal 1 Control signal 2 a  RegDst MemRead b  RegWrite MemRead 4 9 4  20   4 4  What is the value of these two signals for this instruction  4 9 5  20   4 4  For the datapath from Figure 4 24, draw the logic diagram for the part of the control unit that implements just the fi rst signal  Assume that we only need to support lw, sw, beq, add, and j (jump) instructions  4 9 6  20   4 4  Repeat Exercise 4 9 5, but now implement both of these signals

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Question: Exercise 4.9 In this exercise we examine the operation of the single-cycle datapath for a particular instruction. Problems in this exercise refer to the following

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