BYPASS TO MULTIPLE DESTINATIONS

ADD   R1, R2, R3      R1:=R2 + R3 

SW     25(R1), R1 		  Store[25+R1]:=R1

ADD R1,R2,R3

IF

ID

EX$_\searrow$

MEM

WB

SW 25(R1),R1

IF

ID

WB

$^\uparrow$R2+R3 used for address

$^\uparrow$R2+R3 sent to memory

• Notice here we have to bypass the register file to route a value direct from the ALU to the ALU as before - but also, we need to use bypassing to route data to the memory address register.

• In general, bypassing may be applied to any pair of functional units.