can anyone show me the work? Thank you so much! Assume that an instruction fetch

Question

can anyone show me the work? Thank you so much!

Assume that an instruction fetch, operand load, or storage of a result takes 10 ns to complete. Instruction decode, operation execution, and program counter update each take 1 ns to complete. How long does it take to execute the following code sequence? Assume that a CPU can perform a multiplication (*) operation in 10 ns. and a subtraction operation in Ins. How long will it take for the CPU to calculate the result

Explanation / Answer

sub D,E,F Instruction fetch = 1 ns ( fetch the entire instruction) decode the instruction = 10ns ( decode it) operand load = 10ns ( load the values of E and F) operation execution = 1ns ( perform E - F) storage of result = 10ns ( D -> E - F) program counter update = 1ns (update PC) Total = 33ns Similarly add H,G,D Instruction fetch = 1 ns ( fetch the entire instruction) decode the instruction = 10ns ( decode it) operand load = 10ns ( load the values of G and D) operation execution = 1ns ( perform G+D) storage of result = 10ns ( H -> G + D) program counter update = 1ns (update PC) Total = 33ns d = a*b - a*c instruction fetch = 1 ns ( fetch the entire instruction) decode the instruction = 10ns ( decode it) Load the operands ( a,b) = 10 ns Multiply a*b ( 10ns) Load a and c = 10ns Multiply a*c ( 10ns) operation execution = 1ns ( perform a*b - a*c) storage of result = 10ns ( d -> a*b - a*c) program counter update = 1ns (update PC) Total = 63 ns

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