615 For the following data what is the average number of cyc

[6.15] For the following data, what is the average number of cycles per instruction?

Operation Frequency Cycles

Arithmetic/logical operations 45% 1

Register load operations 18% 5

Register store operations 10% 2

Unconditional branch instructions 7% 1

Conditional branch instructions 20% 6

A) 3.65

B)2.82

C)1.87

D)2.10

Solution

Average number of cycles= 0.45 *1 + 0.18 *5 + 0.1 *2 + 0.07*1 + 0.2*6

0.45+0.9+0.2+0.07+1.2

=2.82