quiz11-scratchwork
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North Carolina State University *
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463
Subject
Electrical Engineering
Date
Dec 6, 2023
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pptx
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9
Uploaded by ProfessorRabbitPerson939
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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1
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