A.MOV AX,[SI] B.MOV AX,[DI] C.MOV AX,[SI+DI] D.MOV AX,[SI-10]
A.TEST AL,BL B.CMP AL,BL C.AND AL,BL D.XOR AL,BL
A.JNC NEXT B.CMP AX,BX C.SHL AX,1 D.OR AL,AL