Question $2(8$points$)$: For the following scenarios, give an example of an instruction that

meets the given conditions. If no such instruction exists, write N$/$A instead.

Question $2-$a$)$ The following sequence of instructions is scheduled using register

scoreboarding. Assume that the hardware has $2$ add$/$sub units, $2$ load$/$store units, and $2$

multiplication units.

Give an example of I$4$ that cannot be issued immediately after I$3$ due to:

i$)$ Structural Hazard

I$4$:

ii$)$ WAW Hazard

I$4$:

Question $2-$b$)$ The following sequence of instructions is scheduled using Tomasulo

algorithm. Assume that the hardware has $2$ add$/$sub units, $2$ load$/$store units, and $2$

multiplication units.

I$1$: ADD R$3,$ R$5,$ R$2$

$I2\frac{\text{:}}{M}UL,R1,R2,R4$

I$3$: ADD R$5,$ R$2,$ R$4$

I$4$:

Give an example of I$4$ that cannot be issued immediately due to:

i$)$ Structural Hazard

I$4$:

ii$)$ WAW Hazard

I$4$: