How many cycles will it take to process all instructions
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
Related questions
Question
![Forwarding
In this exercise, we examine how data dependencies affect execution in the basic 5-stage pipeline
described in COD Section 4.5 (An overview of pipelining).
Problems in this exercise refer to the following sequence of instructions:
1) add St1, St2, St3
2) sub St2, St1, St4
3) add St1, $t1, $t2
Assume there is full forwarding in this pipelined processor.
a) Write the sequence of instructions and include NOP (no operation dummy instructions) to
eliminate any hazards.
b) How many cycles will it take to process all instructions
Hint: Remember that only RAW dependencies matter in a pipeline.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7c292060-2b40-4756-93b3-639a63b5f90d%2F9829e358-97f3-4a07-a9cc-0a533284aa73%2F22ro9t_processed.png&w=3840&q=75)
Transcribed Image Text:Forwarding
In this exercise, we examine how data dependencies affect execution in the basic 5-stage pipeline
described in COD Section 4.5 (An overview of pipelining).
Problems in this exercise refer to the following sequence of instructions:
1) add St1, St2, St3
2) sub St2, St1, St4
3) add St1, $t1, $t2
Assume there is full forwarding in this pipelined processor.
a) Write the sequence of instructions and include NOP (no operation dummy instructions) to
eliminate any hazards.
b) How many cycles will it take to process all instructions
Hint: Remember that only RAW dependencies matter in a pipeline.
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