Consider a fairly standard 5-stage pipeline: Fetch; Decode; Execute; Memory; Writeback. Let the processor be a nice, simple RISC single-cycle machine. The instructions below are executed. The branch should be taken — however, this processor does no prediction and always assumes a fall-through. Draw a Gantt chart for this and determine the branch penalty. SUB R1, R1, #1 BEQ R1, R0, LoopDone LOAD R2, Memory(100) SUB R3, R2, R1 MUL R3, R3, R3 LOAD R4, Memory(200) ADD R5, R4, R3 STORE R5, Memory(204)
Consider a fairly standard 5-stage pipeline: Fetch; Decode; Execute; Memory; Writeback. Let the processor be a nice, simple RISC single-cycle machine. The instructions below are executed. The branch should be taken — however, this processor does no prediction and always assumes a fall-through. Draw a Gantt chart for this and determine the branch penalty. SUB R1, R1, #1 BEQ R1, R0, LoopDone LOAD R2, Memory(100) SUB R3, R2, R1 MUL R3, R3, R3 LOAD R4, Memory(200) ADD R5, R4, R3 STORE R5, Memory(204)
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Consider a fairly standard 5-stage pipeline: Fetch; Decode; Execute; Memory; Writeback. Let the processor be a nice, simple RISC single-cycle machine. The instructions below are executed. The branch should be taken — however, this processor does no prediction and always assumes a fall-through. Draw a Gantt chart for this and determine the branch penalty.
SUB R1, R1, #1
BEQ R1, R0, LoopDone
LOAD R2, Memory(100)
SUB R3, R2, R1
MUL R3, R3, R3
LOAD R4, Memory(200)
ADD R5, R4, R3
STORE R5, Memory(204)
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