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A0 A

A1 X

A2

A3 A*X

A4 Y

A15

LDH .D *MemA, A0

LDH .D *MemX, A1

MPY .M A0, A1, A3

ADD .L A3, A4, A4

B .? loop

STH .D A4, *MemY

32-bits

Data Memory

.M

.L

Register File A

.D

.?

loop:

.

.

.

1

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Let’s implement step one, adding the branch instruction and label.

What functional unit would be used to implement the branch?