Question: Consider the following 68000 program: (a) What does this program do? (b) How many 16-bit words are needed to store this program in the memory?

Consider the following 68000 program: MOVEA.L MEM1,A0 MOVEA.L MEM2,A2 ADDA.L AO,A1 MOVEA.L A0,A2 MOVE.B (A0)+,DO LOOP CMP.B

(a) What does this program do?

(b) How many 16-bit words are needed to store this program in the memory?

(c) Give an expression for the number of memory accesses required. The expression should be of the form T = a + bn + cm, where n is the number of times the loop is executed, m is the number of times the branch to NXT is not taken, and

a, b, and c are constants.

MOVEA.L MEM1,A0 MOVEA.L MEM2,A2 ADDA.L AO,A1 MOVEA.L A0,A2 MOVE.B (A0)+,DO LOOP CMP.B (AO) +,DO BLE NXT LEA -1(A0),A2 MOVE.B (A2),D0 NXT CMPA.L AO,A1 BGT LOOP MOVE.L A2,DESIRED

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