Name: Box: Date:
HW22
(10 points) Describe the effect that a single stuck-at-0 fault (i.e. regardless of what it should be, the signal is always 0) would have for the signals shown below, in the single-cycle datapath in Figure 4.17, on page 265. Note that the ALUOp signal is two bits in size, LSB and MSB refer to the least-significant and most-significant respectively. Which instructions, if any, will not work correctly? Explain why.
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RegWrite = 0
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ALUOp (LSB) = 0
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ALUOp (MSB) = 0
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Branch = 0
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MemRead = 0
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MemWrite = 0
Datapath for reference:
