How many clock cycles would be required to execute the following sequence of instructions? add $t1,...

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How many clock cycles would be required to execute the following sequence of instructions? add $t1,...

How many clock cycles would be required to execute the following sequence of instructions? add $t1, $t2, $t3 #1 lw $t3, 0($t1) #2 add $t2, $t2, $t3 #3 add $t3, $t1, $t2 #4

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Answer 1

Answer #1

add $t1, $t2, $t3 #1

lw $t3, 0($t1) #2

add $t2, $t2, $t3 #3

add $t3, $t1, $t2 #4

1, 3 and 4 are R-type instructions which takes 4 cycles of execution.

#2 is load instruction which takes 5 cycles of execution.

Hence in total it takes 3*4 + 5 = 17 cycles.

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Answer 2

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