In executing a MIPS instruction, the speedup factor or the ratio between the CPU time without...
In executing a MIPS instruction, the speedup factor or the ratio between the CPU time without pipeline and the CPU time with pipeline will be close to 5 for large number of MIPS instructions.
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In executing a MIPS instruction, the speedup factor or the ratio
between the CPU time without...
We’re executing the following instruction sequences on a 5-stage MIPS pipeline. Add R8, R9, R10 Lw...
We’re executing the following instruction sequences on a 5-stage MIPS pipeline. Add R8, R9, R10 Lw R14, 0x0020(R12) Or R16, R9, R10 Sw R12, 0x0020(R10) Addi R20, R21, 5 (1) At cycle 5, what action (add, sub, and, or) is ALU performing? (2) At cycle 5, what is the action (read, write, no action) of DM? (3) At cycle 5, which registers are being read out? (4) What is the speedup comparing with the unpipelined execution of the same instruction...
We’re executing the following instruction sequences on a 5-stage MIPS pipeline. Add R8, R9, R10 Lw...
We’re executing the following instruction sequences on a 5-stage MIPS pipeline. Add R8, R9, R10 Lw R14, 0x0020(R12) Or R16, R9, R10 Sw R12, 0x0020(R10) Addi R20, R21, 5 (1) At cycle 5, what action (add, sub, and, or) is ALU performing? (2) At cycle 5, what is the action (read, write, no action) of DM? (3) At cycle 5, which registers are being read out? (4) What is the speedup comparing with the unpipelined execution of the same instruction...
1. Consider the MIPS pipeline discussed in class, suppose the register between the Instruction Decode and...
1. Consider the MIPS pipeline discussed in class, suppose the register between the Instruction Decode and Execute stages were removed. a. How would this affect the clock cycle? b. What is the speedup of the five stage pipeline vs. this new four stage pipeline? Assume ideal CPI for both cases. c. If the CPl of the five stage pipeline was not ideal, calculate by how much the NOPs would have to be reduced to make the change in the design...
1. Given the following instruction sequence for the MIPS processor with the standard 5 stage pipeline $10, S0. 4 addi lw S2.0(S10) add sw S2,4(510) $2, $2, $2 Show the data dependences between th...
1. Given the following instruction sequence for the MIPS processor with the standard 5 stage pipeline $10, S0. 4 addi lw S2.0(S10) add sw S2,4(510) $2, $2, $2 Show the data dependences between the instructions above by drawing arrows between dependent instructions (only show true/data dependencies). a. Assuming forwarding support, in what cycle would the store instruction write back to memory? Show the cycle by cycle execution of the instructions as they execute in the pipeline. Also, show any stalls...
AziTech is considering the design of a new CPU for its new model of computer systems...
AziTech is considering the design of a new CPU for its new model of computer systems for 2021. It is considering choosing between two (2) CPU (CPUA and CPUB) implementations based on their performance. Both CPU are expected to have the same instruction set architecture. CPUA has a clock cycle time of 60 ns and CPUB has a clock cycle time of 75 ns. The same number of a particular instruction type is expected to be executed on both CPUs...
suppose that execution time for a program is directly proportional to instruction access time and that...
suppose that execution time for a program is directly proportional to instruction access time and that access to an instruction in the cache is 20 times faster than access to an instruction in the main memory. assume that there is 96% chance to find the requested instruction in the cache (probability to find the requested instruction in the cache is 0.96), and also assume that if an instruction is not found in the cache, it must be first fetched from...
We found that the instruction fetch and memory stages are the critical path of our 5-stage...
We found that the instruction fetch and memory stages are the
critical path of our 5-stage pipelined MIPS CPU. Therefore, we
changed the IF and MEM stages to take two cycles
while increasing the clock rate. You can assume that the register
file is written at the falling edge of the clock.
Assume that no pipelining optimizations have been made, and that
branch comparisons are made by the ALU. Here’s how our pipeline
looks when executing two add instructions:
Clock...
Assembly Language: Is it TRUE or FALSE: Reduced Instruction Set Computers (RISC) are characterized by: Relatively...
Assembly Language: Is it TRUE or FALSE: Reduced Instruction Set Computers (RISC) are characterized by: Relatively few instructions Relatively few addressing modes Memory access is limited to load and store instructions All operations are done within the registers of the CPU Fixed-length, easily decoded instruction format Relatively large number of registers in the processor A) True B) False
6) Given the MIPS five stage pipeline and the following instruction sets: [30 pts, 10 pts each] i...
Computer organization
6) Given the MIPS five stage pipeline and the following instruction sets: [30 pts, 10 pts each] instruction set #1 1w $1, 40 ($6) add $2, $3, $1 add $1, $6, $4 and $1, $1, $4 sw $2, 20 ($4) instruction set #2 add $1, $5, $3 sw$1, 0 ($2) lw $1, 4 ($2) add $5, $5, $1 sw$1, 8 ($2) a) If there is no forwarding or hazard detection, write the instructions (same order) and insert nop's...
Topics 1. MIPS instruction set architecture (ISA). 2. Performance. 3. MIPS datapath and control. Exercise 1...
Topics 1. MIPS instruction set architecture (ISA). 2. Performance. 3. MIPS datapath and control. Exercise 1 Consider the memory and register contents shown below. Registers Ox0100 FFF8 13 ($t 5) 14 ($t6) 0x0100 FFFC 0x0101 0000 Memory 0x0000 0000 0x0001 1100 0x0A00 со00 0x1234 4321 OxBAOO OOBB 15 OXAAAA 0000 0x1111 1010 0x7FFF FFFD 0x0100 FFFO 0x0101 0008 (St7) Ox0101 0004 16 ($80) 0x0101 0008 17 ($sl) Show what changes and give the new values in hexadecimal after the following...
1. Consider the MIPS pipeline discussed in class, suppose the register between the Instruction Decode and Execute stages were removed. a. How would this affect the clock cycle? b. What is the speedup of the five stage pipeline vs. this new four stage pipeline? Assume ideal CPI for both cases. c. If the CPl of the five stage pipeline was not ideal, calculate by how much the NOPs would have to be reduced to make the change in the design...
1. Given the following instruction sequence for the MIPS processor with the standard 5 stage pipeline $10, S0. 4 addi lw S2.0(S10) add sw S2,4(510) $2, $2, $2 Show the data dependences between the instructions above by drawing arrows between dependent instructions (only show true/data dependencies). a. Assuming forwarding support, in what cycle would the store instruction write back to memory? Show the cycle by cycle execution of the instructions as they execute in the pipeline. Also, show any stalls...
We found that the instruction fetch and memory stages are the
critical path of our 5-stage pipelined MIPS CPU. Therefore, we
changed the IF and MEM stages to take two cycles
while increasing the clock rate. You can assume that the register
file is written at the falling edge of the clock.
Assume that no pipelining optimizations have been made, and that
branch comparisons are made by the ALU. Here’s how our pipeline
looks when executing two add instructions:
Clock...
Computer organization
6) Given the MIPS five stage pipeline and the following instruction sets: [30 pts, 10 pts each] instruction set #1 1w $1, 40 ($6) add $2, $3, $1 add $1, $6, $4 and $1, $1, $4 sw $2, 20 ($4) instruction set #2 add $1, $5, $3 sw$1, 0 ($2) lw $1, 4 ($2) add $5, $5, $1 sw$1, 8 ($2) a) If there is no forwarding or hazard detection, write the instructions (same order) and insert nop's...
Topics 1. MIPS instruction set architecture (ISA). 2. Performance. 3. MIPS datapath and control. Exercise 1 Consider the memory and register contents shown below. Registers Ox0100 FFF8 13 ($t 5) 14 ($t6) 0x0100 FFFC 0x0101 0000 Memory 0x0000 0000 0x0001 1100 0x0A00 со00 0x1234 4321 OxBAOO OOBB 15 OXAAAA 0000 0x1111 1010 0x7FFF FFFD 0x0100 FFFO 0x0101 0008 (St7) Ox0101 0004 16 ($80) 0x0101 0008 17 ($sl) Show what changes and give the new values in hexadecimal after the following...
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