7.11 Write an assembly program with the following specifications. a. In the main

Question

7.11 Write an assembly program with the following specifications. a. In the main block, you should have two registers R4 and R5. They should be checked in an infinite loop. If R4 is greater than R5, then the greater subroutine will be called. If R4 is less than R5, then the less subroutine will be called. If R4 equals R5, then no operations will be done. b. In the greater subroutine, your code will fill the decimal numbers 1, 2, 3, 4, 5 in hexadecimal form to five successive memory locations. After this operation, the value in R4 will be decreased by one. c. In the less subroutine, your code will fill the decimal numbers 10, 9, 8, 7, 6 in hexadecimal form to five successive memory locations. After this operation, the value in R4 will be decreased by one. T

his is an assembly code written as (mov.w #00, R4)please!!!

Explanation / Answer

Here in answer:

MY_TABLE is some memory location where we want to write.

START:

CMP R4,R5;

JG greater; // if R4 is greater than R5 jump to greater label

JL less; // if R4 is less than R5 jump to less label

JMP START; // jump to start infinite loop

greater :

MOV EBX, [MY_TABLE]; // move address to EBX

MOV [EBX], 1;

ADD EBX,4; // Suppose 4 bytes of each block

MOV [EBX], 2;

ADD EBX, 4;

MOV [EBX], 3;

ADD EBX, 4;

MOV [EBX], 4;

ADD EBX, 4;

MOV [EBX], 5;

DEC [R4];

ret

less :

MOV EBX, [MY_TABLE]; // move address to EBX

MOV [EBX], 10;

ADD EBX,4; // Suppose 4 bytes of each block

MOV [EBX], 9;

ADD EBX, 4;

MOV [EBX], 8;

ADD EBX, 4;

MOV [EBX], 7;

ADD EBX, 4;

MOV [EBX], 6;

DEC [R4];

ret

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