The following program supposed to determine whether a sequence of memory locatio

Question

The following program supposed to determine whether a sequence of memory locations contains a 5 or not. It stores a 1 in R0 if 5 was found, and it stores a 0 in R0, otherwise, but the program fails to do so. Identify the error and explain how to fix it?

                                .ORIG x3000

            AND   R0, R0, #0

            ADD   R0, R0, #1

            AND   R1, R1, #0

            ADD   R1, R1, #-5

            AND   R3, R3, #0

            ADD   R3, R3, #4

            LD    R4, PTR

            LDR   R2, R4, #0

      AGAIN ADD   R2, R2, R1

            BRz   FIN

            ADD   R4, R4, #1

            ADD   R3, R3, #-1

            LDR   R2, R4, #0

            BRp   AGAIN

            AND   R0, R0, #0

      FIN   HALT

      PTR   .FILL x3015

            .END

Explanation / Answer

it seems fine

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