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This exercise explores how exception handling affects pipeline design. The first

ID: 3714729 • Letter: T

Question

This exercise explores how exception handling affects pipeline design. The first three problems in this exercise refer to the instructions above.

4.17.1: Which exceptions can each of these instructions trigger? For each of these exceptions, specify the pipeline stage in which it is detected.

4.17.2: If there is a separate handler address for each exception, show how the pipeline organization must be changed to be able to handle this exception. You can assume that the addresses if these handlers are known when the processor is designed.

Instruction 1 BNE R1, R2, Label Instruction 2 LW R1,0(R1)

Explanation / Answer

Solution:

4.17.1

As a consequence the pipepline stages will be distinguished as

Instruction 1=> Invalid Target address (EX)

Instruction 2=> Invalid data address (MEM)

4.17.2)

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