I\'m having trouble with this homework assignment. It is coded in ARM Assembly,

Question

I'm having trouble with this homework assignment. It is coded in ARM Assembly, and I would appreciate it if you could leave comments explaining what is happening for each line of code. If not, I understand. Thank you!

An array contains 100 integers. The array is stored in the data section of the MSP432 memory. Array_ptr is a pointer that points to the first element in this array. It is defined in the .data section of MSP432. Write a snippet of code in ARM assembly that will check every element in the array, and count the total number of even integers. Store the even numbers on another stack pointed to by array_ptr2. Assume there is enough ram space available for both arrays.

Explanation / Answer

mov   bx,28            ; bx indexes row 2
    xor   si,si            ; si will index columns
    mov   cx,7             ; # elements in a row

clear:

    mov   [bx + si + A],0 ; clear A[2,j]
    add   si,2             ; go to next column
    loop clear            ; loop until done

mov   si,6            &n bsp; ; si indexes column 3
        xor   bx,bx             ; bx will index rows
        mov   cx,5            &n bsp; ; #elements in a column
clear:
        mov   [bx + si + A],0   ; clear A[i,3]
        add   bx,14             ; go to next row
        loop clear             ; loop until done

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