Data Hazards: Solution - III

Solution III (hardware)



• Bypass paths.
  • Extra data paths and control logic which re-route data in problem cases.

ADD

CMP

MUL

ADD

CMP

ADD

CMP

MUL

ADD

CMP

MUL

i

i + 1

i + 3

i + 4

i + 5

i + 6

IF

RF

ALU

WB

SUB

SUB

SUB

ADD(r1, r2, r3)

CMPLEC(r3, 5, r0)

r1 + r2 computed

r3 written

r3 read

r3 compared to 5

i + 2

SUB

MUL

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