Question: 1 . Consider a pipeline with forwarding, hazard detection, and 1 delay slot for branches. The pipeline is the typical 5 - stage IF ,

1 .

Consider a pipeline with forwarding, hazard detection, and

1

delay slot for branches. The pipeline is the typical

5 -

stage IF

,

,

,

MEM, WB MIPS design. For the code below, complete the pipeline table below

(

instructions on the left, cycles on top

)

for the code. Insert the characters IF

,

,

,

MEM, WB for each instruction in the boxes. Label all data stalls

(

Draw an X in the box

) .

Label all data forwards that the forwarding unit detects

(

arrow between the stages handing off the data and the stages receiving the data

) . [

0

: ADD R

4 =

1 +

0

;; I

1

: SUB R

9 =

3 -

4

;; I

2

: ADD R

4 =

5 +

6

;; I

3

: LW R

2 =

MEM

[

3 + 100]

;; I

4

: LW R

2 =

MEM

[

2 + 0]

;; I

5

: SW MEM

[

4 + 100] =

2

;; I

6

: AND R

2 =

2

& R

1

;; I

7

: BEQ R

9 = =

1,

Target;; I

8

: AND R

9 =

9

& R

1

;

]

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