quiz11-scratchwork

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North Carolina State University *

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463

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Electrical Engineering

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Dec 6, 2023

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Quiz 11 “scratch work” NC State University Department of Electrical and Computer Engineering ECE 463/563 (Rotenberg) NCSU Honor Pledge: "I have neither given nor received unauthorized aid on this quiz." Student’s electronic signature: _______________________ (sign by typing your name)
Key add <dest. reg.>, <source reg. 1>, <source reg. 2> // 1 cycle in EX mult <dest. reg.>, <source reg. 1>, <source reg. 2> // 5 cycles in EX
Problem Setup Consider a scalar OOO pipeline with a 3-entry IQ and 32-entry ROB. The pipeline is comprised of 9 stages as considered in class: FE, DE, RN, RR, DI, IS, EX, WB, RT.
Question 1a 1a. Fill in the schedule for the following 6-instruction sequence. (i1 is fetched in cycle 1. i6 is fetched in cycle 10 due to an L1 I$ miss.) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 i1: mul r3, r1, r2 FE i2: add r3, r3, r4 i3: add r6, r5, r3 i4: add r3, r1, r4 i5: add r2, r3, r7 i6: add r3, r2, r3 (i6 missed in L1 I$, hence delayed fetch of i6) FE
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