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Consider the following code to be executed on a pipelined processor lw $s1, 40(Ss6) add $s6,...
The code chain below is executed on a data forwarding, 5-stage pipelined processor. Which of the...
The code chain below is executed on a data forwarding, 5-stage pipelined processor. Which of the following instructions will encounter a stall? Write the instruction number along with the number of stall cycles that instruction experiences. (Note the data forwarding) 1. add $4, $5, $6 2. add $7, $4, $5 3. sw $8, 0($7) 4. add $8, $8, $6 5. lw $6, 0($8) 6. add $10, $9, $8
Given the following sequence of instructions: lw $s2, 0($s1) //1 lw $s1, 40($s3) //2 sub $s3,...
Given the following sequence of instructions: lw $s2, 0($s1) //1 lw $s1, 40($s3) //2 sub $s3, $s1, $s2 //3 add $s3, $s2, $s2 //4 or $s4, $s3, $zero //5 sw $s3, 50($s1) //6 a. List the read after write (current instruction is reading certain registers which haven’t been written back yet) data dependencies. As an example , 3 on 1 ($s2) shows instruction 3 has data dependency on instruction 1 since it is reading register $s2. b. Assume the 5...
(60 points) The following instructions are executed on the 5-stage MIPS pipelined datapath. add r...
Computer architecture help:
(60 points) The following instructions are executed on the 5-stage MIPS pipelined datapath. add r5,r2, r1 lw r3, 4(r5) lw r2, 0(r2) or r3, r5, r3 sw r3, 0(r5) (a) (20 points) List the data hazards in the above code. For each data hazard identified, clearly mark the source and the destination. For example you can say, there is a data hazard from instruction X to instruction Y on register Z. (b) (20 points) Assume there is...
2 This exercise is intended to help you understand the relationship between forwarding hazard detection, and...
2 This exercise is intended to help you understand the relationship between forwarding hazard detection, and ISA design. Problems in this exercise refer to the following sequence of instructions, and assume that it is executed on a 5-stage pipelined datapath: lw r5,4(r5) add r5,r2,r5 Iw r3,0(r5) or r3,r5,r3 sw r4,0(r5) 2.1 If there is no forwarding or hazard detection, how many nops needed to be inserted to ensure correct execution, and how many cycles needed to execute the codes? 2.2...
The pipelined MIPS datapath executes the following code: lw $16, 12($4) lw $17, 16($4) beq $8, $9...
The pipelined MIPS datapath executes the following code: lw $16, 12($4) lw $17, 16($4) beq $8, $9, skip sw $18, 16($4) add $18, $16, $18 How many cycles does it take to execute the code if the branch is not taken?
2 This exercise is intended to help you understand the relationship between forwarding hazard detection, and...
2 This exercise is intended to help you understand the relationship between forwarding hazard detection, and ISA design. Problems in this exercise refer to the following sequence of instructions, and assume that it is executed on a 5-stage pipelined datapath: w r5,4(r5) add r5,r2,r5 w r3,0(r5) or r3,r5,r3 sw r4,0(r5) 2.1 If there is no forwarding or hazard detection, how many nops needed to be inserted to ensure correct execution, and how many cycles needed to execute the codes? 2.2...
Question 1: Problems in this exercise refer to the following sequence of instructions : LW $5,...
Question 1: Problems in this exercise refer to the following sequence of instructions : LW $5, -16($5) SW $5, -16($5) ADD $5, $5, $5 A) Indicate dependences and their type. (40 Points) B) Assume there is not forwarding in this pipeline processor, indicate hazards and add NOP instructions to eliminate them. C) Assume there is full forwarding, indicate hazards and add NOP instructions to eliminate unresolved cases. The remaining problem in this exercise assumes the following clock cycle times: Without...
In the class, we have shown how to maximize performance on our pipelined datapath with forwarding...
In the class, we have shown how to maximize performance on our pipelined datapath with forwarding and stalls on a use following a load. Rewrite the following code to minimize performance on this datapath – that is, reorder the instructions so that this sequence takes the most clock cycles to execute while still obtaining the same result: lw $3, 0($5) lw $4, 4($5) add $7, $7, $3 add $8, $8, $4 add $10, $7, $8 sw $6, 0($5) beq $10,...
(10pts) (A) Identify hazards (including type of the hazard) in the following code. Write hazards next to each instruction. Write none if there is no hazard. Assume that each instruction could hav...
(10pts) (A) Identify hazards (including type of the hazard) in the following code. Write hazards next to each instruction. Write none if there is no hazard. Assume that each instruction could have more than one hazard and I5 does not create a control hazard, Type of Hazards Instructions I: LABEL:lw Ss2, 0(Ss0) none 12: 13: 14 15: 16: add Ss1, Ss6, $sl add Stl, Ss0, $s2 and St1, St, $s3 sw St1 0(Ss0) beq St1, St7, LABEL (B) How many...
Q.5. Show the space-time diagram of the following program using the pipelined processor. Assume t...
this could be the answer for the first part
Q.5. Show the space-time diagram of the following program using the pipelined processor. Assume that data hazards are detected at the ID stage and no forwarding hardware is used. Also, no structural hazard exists. Compute the total number of clock cycle:s needed to execute the program. lw l, 100(Ss1) sub St4, Stl, St:5 add St6, $t1, St?7 or St8, Stl, $t9 Q.6. Repeat Q.5 assuming complete forwarding is used. Cs2 ん5+1...
Computer architecture help:
(60 points) The following instructions are executed on the 5-stage MIPS pipelined datapath. add r5,r2, r1 lw r3, 4(r5) lw r2, 0(r2) or r3, r5, r3 sw r3, 0(r5) (a) (20 points) List the data hazards in the above code. For each data hazard identified, clearly mark the source and the destination. For example you can say, there is a data hazard from instruction X to instruction Y on register Z. (b) (20 points) Assume there is...
2 This exercise is intended to help you understand the relationship between forwarding hazard detection, and ISA design. Problems in this exercise refer to the following sequence of instructions, and assume that it is executed on a 5-stage pipelined datapath: lw r5,4(r5) add r5,r2,r5 Iw r3,0(r5) or r3,r5,r3 sw r4,0(r5) 2.1 If there is no forwarding or hazard detection, how many nops needed to be inserted to ensure correct execution, and how many cycles needed to execute the codes? 2.2...
2 This exercise is intended to help you understand the relationship between forwarding hazard detection, and ISA design. Problems in this exercise refer to the following sequence of instructions, and assume that it is executed on a 5-stage pipelined datapath: w r5,4(r5) add r5,r2,r5 w r3,0(r5) or r3,r5,r3 sw r4,0(r5) 2.1 If there is no forwarding or hazard detection, how many nops needed to be inserted to ensure correct execution, and how many cycles needed to execute the codes? 2.2...
(10pts) (A) Identify hazards (including type of the hazard) in the following code. Write hazards next to each instruction. Write none if there is no hazard. Assume that each instruction could have more than one hazard and I5 does not create a control hazard, Type of Hazards Instructions I: LABEL:lw Ss2, 0(Ss0) none 12: 13: 14 15: 16: add Ss1, Ss6, $sl add Stl, Ss0, $s2 and St1, St, $s3 sw St1 0(Ss0) beq St1, St7, LABEL (B) How many...
this could be the answer for the first part
Q.5. Show the space-time diagram of the following program using the pipelined processor. Assume that data hazards are detected at the ID stage and no forwarding hardware is used. Also, no structural hazard exists. Compute the total number of clock cycle:s needed to execute the program. lw l, 100(Ss1) sub St4, Stl, St:5 add St6, $t1, St?7 or St8, Stl, $t9 Q.6. Repeat Q.5 assuming complete forwarding is used. Cs2 ん5+1...
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