Arm/arraysum

Write a function that returns the sum of all elements of an array of 32-bit (signed) words.

The function has two parameters. The first parameter is a pointer to the start of the array. The second parameter is the length of the array (at least 1).

Sample Input

[1, 2, 3]

Sample Output

r0=6

// A test case to test your function with
Array: .word 1, 2, 3

.global _start
_start:
    ldr r0, =Array
    ldr r1, =3 
    bl arraysum
    b _start        // End of testing code

// Sum elements of array
arraysum:

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Arm/arraysum

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