Consider a standard 5-stage MIPS pipeline of the type discussed
during the class sessions: IF-
ID-EX-M-WB.
Assume that forwarding is not implemented and only the hazard
detection and stall logic is
implemented so that all data dependencies are handled by having the
pipeline stall until the
register fetch will result in the correct data being fetched.
Furthermore, assume that the memory is written/updated in the first
half of the clock cycle
(i.e. on the rising edge of the clock) and is accessed for reading
in the second half (i.e. on the
falling edge of the clock)
(a) How many stalls will be inserted during the execution of
following sequence of instructions?
Justify your answer by providing a complete execution trace of
instructions using a figure
similar to the one given at page # 381 (fig 6.8) of your
book.
add r1, r2, r3
add r4, r1, r5
add r1, r2, r3
sw r1, 42(r8)
lw r1, 10(r7)
add r11, r1, r9
(b) Next assume that the register file has only one read port
and hence we need to modify the
pipeline by adding one additional stage IF-ID-REG2-EX-M-WB into it.
Description of various
pipeline stages is as follows
Making the same assumptions as given at the beginning of the
question repeat the part a for
this pipeline implementation
Homework Answers
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Step 2 :- (a)Let every stage takes 1 cycles in 5 stage pipeline
IF------------Instruction Fetch
ID------------Instruction Decode
EX-----------Execution
MA-----------Memory Access
WB----------Write Back
| IF | ID | EX | MA | WB | |
| I1 | 1cycle | 1cycle | 1cycle | 1cycle | 1cycle |
| I2 | 1cycle | 1cycle | 1cycle | 1cycle | 1cycle |
| I3 | 1cycle | 1cycle | 1cycle | 1cycle | 1cycle |
| I4 | 1cycle | 1cycle | 1cycle | 1cycle | 1cycle |
| I5 | 1cycle | 1cycle | 1cycle | 1cycle | 1cycle |
| I6 | 1cycle | 1cycle | 1cycle | 1cycle | 1cycle |
Step 4 :- (b) Let every stage takes 1 cycles in 6 stage pipeline
IF------------Instruction Fetch
ID------------Instruction Decode
REG2-------Additional Stage For 2nd operand
EX-----------Execution
MA-----------Memory Access
WB----------Write Back
| IF | ID | REG2 | EX | MA | WB | |
| I1 | 1cycle | 1cycle | 1cycle | 1cycle | 1cycle | 1cycle |
| I2 | 1cycle | 1cycle | 1cycle | 1cycle | 1cycle | 1cycle |
| I3 | 1cycle | 1cycle | 1cycle | 1cycle | 1cycle | 1cycle |
| I4 | 1cycle | 1cycle | 1cycle | 1cycle | 1cycle | 1cycle |
| I5 | 1cycle | 1cycle | 1cycle | 1cycle | 1cycle | 1cycle |
| I6 | 1cycle | 1cycle | 1cycle | 1cycle | 1cycle | 1cycle |
Add Answer to:
Consider a standard 5-stage MIPS pipeline of the type discussed
during the class sessions: IF-
ID-EX-M-WB....
c. The classic five-stage pipeline MIPS architecture is used to execute the code fragments. Assume the...
c. The classic five-stage pipeline MIPS architecture is used to execute the code fragments. Assume the followings: Register write is done in the first half of the clock cycle; register read is performed in the second half of the clock cycle, Branches are resolved in the second stage of the pipeline and the architecture does not utilize any branch prediction mechanism Forwarding is fully supported Clock Cycle à 1 2 3 4 5 6 7 8 9 10 11 12...
The datapath for 5-stage MIPS pipelined architecture is given below. IFAID ID/EX EX/MEM MEM/WB > Add...
The datapath for 5-stage MIPS pipelined architecture is given below. IFAID ID/EX EX/MEM MEM/WB > Add Add Add result Shift left 2 Lo-o PC Address Read register 1 Read Read data Instruction memory register Registers Read SALU Zero ALU result Read Address data data 2 Write register Write data Data memory Write data 16 Sign- extend Choose all the components that generate a useful result during the execution of the following instruction: ADD R1, R2, R3 O 1. Program Counter...
The classic five-stage pipeline MIPS architecture is used to execute the code fragments in this problem....
The classic five-stage pipeline MIPS architecture is used to
execute the code fragments in this problem. Assume the
followings:
The architecture fully supports forwarding,
Register write is done in the first half of the clock cycle;
register read is performed in the second half of the clock
cycle,
Branches are resolved in the third stage of the pipeline and
the architecture does not utilize any branch prediction
mechanism,
Register R4 is initially 100.
L1: lw R1,
0(R4)
add R3, R1, R2
sw ...
The datapath for 5-stage MIPS pipelined architecture is given below. IF/D ID/EX EX/MEM MEM/WB >Add Add...
The datapath for 5-stage MIPS pipelined architecture is given below. IF/D ID/EX EX/MEM MEM/WB >Add Add Add result Shift left 2 Address Instruction memory Read Read register 1 data Read register "Registers Read Write data 2 register Write data SALU ALU result Address Read data Data memory Write data 16 Sign- 32 extend Choose all the components that generate a useful result during the execution of the following instruction: Choose all the components that generate a useful result during the...
The latencies of individual stages in five-stage MIPS (Microprocessor without Interlocked Pipeline Stages) Architecture are given...
The latencies of individual stages in five-stage MIPS (Microprocessor without Interlocked Pipeline Stages) Architecture are given below. Instruction Instruction Fetch Register Read Arithmetic Logic Unit (ALU) Memory Access Register Write Latency 200ps 100ps 200ps 300ps 100ps a. (10 pts) What is the clock cycle time in a pipelined and non-pipelined processor? Pipelined version : ______________ Non-pipelined version : ______________ b. The classic five-stage pipeline MIPS architecture is used to execute the code fragments. Assume the followings: Register write is done...
The classic five-stage pipeline MIPS architecture is used to execute the code fragments in this problem....
The classic five-stage pipeline MIPS architecture is used to execute the code fragments in this problem. Assume the followings: • The architecture fully supports forwarding, • Register write is done in the first half of the clock cycle; register read is performed in the second half of the clock cycle, • Branches are resolved in the third stage of the pipeline and the architecture does not utilize any branch prediction mechanism, • Register R4 is initially 200. L1: lw lw...
A 5-Stage pipeline is composed of the following stages Instruction Fetch (IF), Decode (DE), Execute (EX), Memory Access...
A 5-Stage pipeline is composed
of the following stages Instruction Fetch (IF), Decode (DE),
Execute (EX), Memory Access (ME) and Register Write-back (WB).
Assume the pipeline does not have a branch prediction unit, does
not have superscalar support and does not support out of order
execution. Assume that all memory accesses are in the L1 cache and
therefore do not introduce any stalls. Show a pipeline diagram that
shows the execution of each stage for the assembly code below. Also...
help Question 11 The classic five-stage pipeline MIPS architecture is used to execute the code fragments...
help
Question 11 The classic five-stage pipeline MIPS architecture is used to execute the code fragments in this problem. Assume the followings: • The architecture fully supports forwarding, • Register write is done in the first half of the clock cycle; register read is performed in the second half of the clock cycle, • Branches are resolved in the third stage of the pipeline and the architecture does not utilize any branch prediction mechanism, • Register R4 is initially 200....
The classic five-stage pipeline MIPS architecture is used to execute the code fragments in this problem....
The classic five-stage pipeline MIPS architecture is used to execute the code fragments in this problem. Assume the followings: • The architecture fully supports forwarding, • Register write is done in the first half of the clock cycle; register read is performed in the second half of the clock cycle, • Branches are resolved in the third stage of the pipeline and the architecture does not utilize any branch prediction mechanism, • Register R4 is initially 100. L1: lw add...
he classic five-stage pipeline MIPS architecture is used to execute the code fragments in this problem....
he classic five-stage pipeline MIPS architecture is used to execute the code fragments in this problem. Assume the followings: The architecture fully supports forwarding, • Register write is done in the first half of the clock cycle; register read is performed in the second half of the clock cycle, • Branches are resolved in the third stage of the pipeline and the architecture does not utilize any branch prediction mechanism, • Register R4 is initially 100. Ll: lw add SW...
The datapath for 5-stage MIPS pipelined architecture is given below. IFAID ID/EX EX/MEM MEM/WB > Add Add Add result Shift left 2 Lo-o PC Address Read register 1 Read Read data Instruction memory register Registers Read SALU Zero ALU result Read Address data data 2 Write register Write data Data memory Write data 16 Sign- extend Choose all the components that generate a useful result during the execution of the following instruction: ADD R1, R2, R3 O 1. Program Counter...
The classic five-stage pipeline MIPS architecture is used to
execute the code fragments in this problem. Assume the
followings:
The architecture fully supports forwarding,
Register write is done in the first half of the clock cycle;
register read is performed in the second half of the clock
cycle,
Branches are resolved in the third stage of the pipeline and
the architecture does not utilize any branch prediction
mechanism,
Register R4 is initially 100.
L1: lw R1,
0(R4)
add R3, R1, R2
sw ...
The datapath for 5-stage MIPS pipelined architecture is given below. IF/D ID/EX EX/MEM MEM/WB >Add Add Add result Shift left 2 Address Instruction memory Read Read register 1 data Read register "Registers Read Write data 2 register Write data SALU ALU result Address Read data Data memory Write data 16 Sign- 32 extend Choose all the components that generate a useful result during the execution of the following instruction: Choose all the components that generate a useful result during the...
The classic five-stage pipeline MIPS architecture is used to execute the code fragments in this problem. Assume the followings: • The architecture fully supports forwarding, • Register write is done in the first half of the clock cycle; register read is performed in the second half of the clock cycle, • Branches are resolved in the third stage of the pipeline and the architecture does not utilize any branch prediction mechanism, • Register R4 is initially 200. L1: lw lw...
A 5-Stage pipeline is composed
of the following stages Instruction Fetch (IF), Decode (DE),
Execute (EX), Memory Access (ME) and Register Write-back (WB).
Assume the pipeline does not have a branch prediction unit, does
not have superscalar support and does not support out of order
execution. Assume that all memory accesses are in the L1 cache and
therefore do not introduce any stalls. Show a pipeline diagram that
shows the execution of each stage for the assembly code below. Also...
help
Question 11 The classic five-stage pipeline MIPS architecture is used to execute the code fragments in this problem. Assume the followings: • The architecture fully supports forwarding, • Register write is done in the first half of the clock cycle; register read is performed in the second half of the clock cycle, • Branches are resolved in the third stage of the pipeline and the architecture does not utilize any branch prediction mechanism, • Register R4 is initially 200....
The classic five-stage pipeline MIPS architecture is used to execute the code fragments in this problem. Assume the followings: • The architecture fully supports forwarding, • Register write is done in the first half of the clock cycle; register read is performed in the second half of the clock cycle, • Branches are resolved in the third stage of the pipeline and the architecture does not utilize any branch prediction mechanism, • Register R4 is initially 100. L1: lw add...
he classic five-stage pipeline MIPS architecture is used to execute the code fragments in this problem. Assume the followings: The architecture fully supports forwarding, • Register write is done in the first half of the clock cycle; register read is performed in the second half of the clock cycle, • Branches are resolved in the third stage of the pipeline and the architecture does not utilize any branch prediction mechanism, • Register R4 is initially 100. Ll: lw add SW...
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