4.9 In this exercise, we examine how data dependences affect execution in thebasic 5-stage pipeline described in Section 4.5. Problems in this exercise refer to thefollowing sequence of instructions:or r1,r2,r3or r2,r1,r4or r1,r1,r2Also, assume the following cycle times for each of the options related to forwarding:Without ForwardingWith Full ForwardingWith ALU-ALU Forwarding Only250ps300ps290ps1.9.1 [10] <$4.5> Indicate dependences and their type.4.9.2 [10] <$4.5> Assume there is no forwarding in this pipelined processor.Indicate hazards and add nop instructions to eliminate them.4.9.3 [10] <$4.5> Assume there is full forwarding. Indicate hazards and add NOPinstructions to eliminate them.4.9.4 [10] <$4.5> What is the total execution time of this instruction sequencewithout forwarding and with full forwarding? What is the speedup achieved byadding full forwarding to a pipeline that had no forwarding?

4.9.1 INSTRUCTION SEQUENCE DEPENDENCES I1: or r1, r2, r3 RAW on R1 from I1 to I2 and I3 I2:…

Answered: 4.9 In this exercise, we examine how…

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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In the context of operating systems
Determine the respective summarized route of routers Rl and R2, to the Internet, with the longest possible network prefix.
Problem 1: (a) Draw pipeline diagram (FI, DI, FO, EI, WO) with one memory port for the following instructions: MOV [1234], 035 ADD [1234], AX SUB BX, CX XOR CX, BX PUSH CX (b) Write the code for the following. Rewrite the code to reduce hazards by instruction rescheduling: [a] = [c]-[e] [b] = [a] + [d] [c] = [f] + [e]
1A. Consider the following code: AREA ASCENDING, CODE, READONLY ENTRY MOV R8, #2 LOOPO LDR R1, [R2], #4 STR R1, [R3], #4 SUBS R8, R8, #1 CMP R8, #0 BNE LOOPO How many clock cycles are required to complete the execution of the above code on non- pipelined processor assuming each instruction will take 1 cycle to execute completely? Show calculations. How many clock cycles required to complete the execution of the above code on 3-staged pipelined processor? Draw the pipeline diagram for the same. Let one stage requires one clock cycle and assume all memory references hit in cache.
Consider the following assembly code: Instruction Description LOAD R1, M1 Read data from memory address M1 and store in R1. XOR R2, R1, R1 Logical Ex-OR between contents of R1 with R1 and store result in R2 BNEZ R2, Target1 Jump to Target if R2 is non-Zero ADD R7, R1, R5 Add contents of R1 and R5 and store to R7 AND R2, R7, R7 Logical Ex-OR between contents of R7 with R7 and store result in R2 Targetl: BEZ R2, Target2 Jump to Target if R2 is Zero LOAD R3, M2 LOAD R4, M3 ADD R10, R3, R4 Target2: ADD R10, R3, R4 STORE M4, R10 Save contents of R10 to memory address M4 END
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CORRECT AND DETAILED ANSWER Assume that the contents in AX and BX are signed numbers and the contents in CX and DX are unsigned numbers. Please use a comparison instruction and a conditional transfer instruction to accomplish the following tasks. If the content in BX is larger than that in AX, transfer to execute the instruction with a label of EXCEED. If the content in BX is larger than or equal to that in AX, transfer to execute the instruction with a label of EXCEED.
Q1 [8]. Translate this following C code into MIPS instructions. Your translation should be direct, without rearranging instructions to achieve better performance. for(i=0; il=j; i+=2) b[i]=a[i]+ a[i+1]; Assume that variables are kept in registers as follows, and that all registers except those indicated as Free are used to keep various variables, so they cannot be used for anything else. i b C Free R7 R2 R3 j R8 a R1 RO,R10,R11,R12
Explain the concept of multithreading in computer programming. How does it differ from multiprocessing?
CPI stands for clock cycles per instruction. Speedup from pipelining = (Number of pipeline stages) / (Achieved CPI ). Assume a 5-stage pipeline. Assume that CPI = 1 when there are no pipeline stalls (the ideal case). Now assume that every branch instruction causes a 3 clock cycle stall in the pipeline. Assume that for the program being executed 30% of executed instructions are branch instructions. What speedup from pipelining is achieved by this program?
Please help me to do this
In a hypothetical interrupt vector table, LDR R0,=IRQ_PROC_ADDR resides at address 0x20. Assume we are using a 5-stage pipeline. The offset in the last twelve bits of the LDR instruction is Ox64. The location of IRQ_PROC_ADDR in the literal pool is

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