[Solved]49 Exercise Examine Data Dependences Affect Execution Basic 5 Stage Pipeline Described Cod Q37121270
4.9 In this exercise, we examine how data dependences 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: or rl, r2, r3 or r2, ri, r4 or ri, ri, r2 Also, assume the following cycle times for each of the options related to forwarding With Full Forwarding With ALU-ALU Only 250ps 300ps 290ps 4.9.1 [10] <COD §4.5-indicate dependences and their type 4.9.2 [10] <COD §4.5> Assume there is no forwarding in this pipelined processor Indicate hazards and add nop instructions to eliminate them. 4.9.3 [10]<COD $4.5> Assume there is full forwarding. Indicate hazards and add NOP instructions to eliminate them. 4.9.4 10 <COD §4.5> What is the total execution time of this instruction sequence without forwarding and with ful forwarding? What is the speedup achieved by adding full forwarding to a pipeline that had no forwarding? 4.9.5 [10] <COD §45p Add nop instructions to this code to eliminate hazards if there is ALU-ALU forwarding only (no forwarding from the MEM to the EX stage) 4.9.6 [10] <COD §4E> What is the total execution time of this instruction sequence with only ALU-ALU forwarding? What is the speedup over a no-forwarding pipeline? Show transcribed image text 4.9 In this exercise, we examine how data dependences 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: or rl, r2, r3 or r2, ri, r4 or ri, ri, r2 Also, assume the following cycle times for each of the options related to forwarding With Full Forwarding With ALU-ALU Only 250ps 300ps 290ps 4.9.1 [10]
Expert Answer
Answer to 4.9 In this exercise, we examine how data dependences affect execution in the basic 5-stage pipeline described in COD Se… . . .
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