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GATE | GATE-CS-2009 | Question 28
Consider a 4 stage pipeline processor. The number of cycles needed by the four instructions I1, I2, I3, I4 in stages S1, S2, S3, S4 is shown below:
What is the number of cycles needed to execute the following loop?
For (i=1 to 2) {I1; I2; I3; I4;}
|
S1 |
S2 |
S3 |
S4 |
|
|
I1 |
2 |
1 |
1 |
1 |
|
I2 |
1 |
3 |
2 |
2 |
|
I3 |
2 |
1 |
1 |
3 |
|
I4 |
1 |
2 |
2 |
2 |
(A)
16
(B)
23
(C)
28
(D)
30
Answer
Please comment below if you find anything wrong in the above post
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