File content as of revision 2:968db132481b:

    AREA asm_func, CODE, READONLY
    EXPORT asm_sort
asm_sort
    PUSH    {R2, R3, R4, R5, LR} ; Some code goes here
outer_loop
    LDR R2, =0x0 ;first index
    LDR R3, =0x1 ;second index
    SUB R1, R1, #1 ;size of array intervaled minus one
    CMP R1, #1 ;make sure interval has at least two elements
    BLT done 
inner_loop
    CMP R3, R1 ;compare interval
    BGT loop_exit ;make sure to restart loop if at the end of first pass
    LDR R4, [R0, R2, LSL #2] ;numbers[first] into R4
    LDR R5, [R0, R3, LSL #2] ;number[second] into R5
    CMP R4, R5 ;compare numbers
    BGT asm_swap ;if out of order swap
    ADD R2, R2, #1 ;increment index R2
    ADD R3, R3, #1 ;increment index R3
    B inner_loop ; go back to keep swapping
asm_swap
    STR     R4, [R0, R3, LSL #2] ;swap numbers in the array
    STR     R5, [R0, R2, LSL #2]
    ADD R2, R2, #1 ;increment index
    ADD R3, R3, #1;increment index
    B inner_loop ;go back to keep swapping
loop_exit
    B outer_loop ;next iteration
done
    POP     {R2, R3, R4, R5, LR} ;free regs
    BX      LR
    ALIGN
    END