Arm/swap

Write a function that will swap two array elements. Your function will be passed three parameters: The first is a pointer to the beginning of the array. The second and third parameters are indexes to specify which pair of elements of the array should be swapped.

int swap (int *pointer, int index1, int index2);

Expected solution length: Around 7 lines.

Sample Input

r0=Data, r1=0, r2=2

Sample Output

[Two array elements swapped]

Data: .word 0x123, 0x124, 0x125
.global _start
_start:
    ldr r0, =Data
    ldr r1, =0
    ldr r2, =2
    bl swap
    1: b 1b    // Done

// Swap two array elements
swap:

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Arm/swap

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