ECE 313 Computer Organization Name FINAL EXAM December 14 ...

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ECE 313 Computer OrganizationNameFINAL EXAM December 14, 20045. Data and Control Hazards 20 PointsAssume that the following sequence of MIPS instructions (including the new l_incinstruction) is executing on the modified pipeline design from Problem 3, but that thedesign is altered to perform forwarding, stalls, and flushing as required to deal with data andcontrol hazards.L: l_inc $2, 200($1)bne $1, $5, Ladd $7, $1, $4sw $8, 0($7)sub $7, $8, $7(a) Circle any data dependencies which exist between these instructions.(b) Mark any of the above instructions that will be stalled due to data hazards.(c) Assuming that the branch is taken, fill in the multicycle diagram shown below to showthe execution of the instruction sequence during one iteration, including stalls,forwarding, and flushes (if any). Shade active stages.Page 6 of 8
ECE 313 Computer OrganizationNameFINAL EXAM December 14, 20046. Short Answers 10 PointsProvide a short answer for each of the following questions:(a) List three features of the Intel IA-32 (x86) Instruction Set Architecture that make itdifficult to implement.(b) List three different types of exceptions which can occur in a full implementation of theMIPS Instruction Set Architecture.(c) List two reasons why Virtual Memory is used in almost all modern computer systems.(d) How many levels of on-chip cache are common in current desktop computer systems?Page 7 of 8
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ECE 313 Computer Organization Name FINAL EXAM December 14 ...

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