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1- What is true about the following code sequence: addi x18, x0, 1 addi x19, x0,...

1- What is true about the following code sequence:

addi x18, x0, 1
addi x19, x0, 2
addi x20, x0, 2
addi x21, x0, 4
addi x22, x0, 5

Must stall on the addi results

Can avoid stalls using only forwarding

Can execute without stalling or forwarding

None of the above


2- What is true about the following code sequence:

ld x9, 64(x22)
add x9, x21, x9

Must stall on the ld result

Can avoid stalls using only forwarding

Can execute without stalling or forwarding

None of the above

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Homework Answers

Answer #1

1)OPHON-A(Must stall on the addi results)

2)OPHON- (Can avoid stalls using only forwarding)

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