In Fig. C-1 the expression de —hwis used as an operand. This value is the difference of two labels. Might there be circumstances in which de + hwcould be used as a valid operand? Discuss your answer....

In Fig. C-1 the expression de —hwis used as an operand. This value is the difference of two labels. Might there be circumstances in which de + hwcould be used as a valid operand? Discuss your answer. Give the assembly code for computing the expression:

x= a + b + 2