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 a.Must stall on the...

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

a.Must stall on the addi results

b.Can avoid stalls using only forwarding

c.Can execute without stalling or forwarding

d.None of the above

2-What is true about the following code sequence:

ld x9, 64(x22) 

add x9, x21, x9

a.Must stall on the ld result

b.Can avoid stalls using only forwarding

c.Can execute without stalling or forwarding

d.None of the above