Convert to Assembly Language M3 Please use as CMP R1 R2 MOV

Convert to Assembly Language M3
(Please use as
CMP R1, R2
MOV R1, #3)
#include
#include
int main()
{
int r1 = 3;
int r2 = 15;
int r3 = 0;
if (r1 <= r2)
{ for (int n = r1; n <= r2; n++)
{ r3 += (50 - n - n + r1 + r2); } }
else
{ r3 = abs(r1) + abs(r2); }
return 0; }

Solution

Assembly Language M3 code for given program------->

main:
        push    {r7}
        sub     sp, sp, #20
        add     r7, sp, #0
        movs    r3, #3
        str     r3, [r7, #8]
        movs    r3, #15
        str     r3, [r7, #12]
        movs    r3, #0
        str     r3, [r7]
        ldr     r2, [r7, #8]
        ldr     r3, [r7, #12]
        cmp     r2, r3
        bgt     .L2
        ldr     r3, [r7, #8]
        str     r3, [r7, #4]
.L4:
        ldr     r2, [r7, #4]
        ldr     r3, [r7, #12]
        cmp     r2, r3
        bgt     .L5
        ldr     r3, [r7, #4]
        rsb     r2, r3, #50
        ldr     r3, [r7, #4]
        subs    r2, r2, r3
        ldr     r3, [r7, #8]
        add     r2, r2, r3
        ldr     r3, [r7, #12]
        add     r3, r3, r2
        ldr     r2, [r7]
        add     r3, r3, r2
        str     r3, [r7]
        ldr     r3, [r7, #4]
        adds    r3, r3, #1
        str     r3, [r7, #4]
        b       .L4
.L2:
        ldr     r3, [r7, #8]
        eor     r2, r3, r3, asr #31
        sub     r2, r2, r3, asr #31
        ldr     r3, [r7, #12]
        cmp     r3, #0
        it      lt
        rsblt   r3, r3, #0
        add     r3, r3, r2
        str     r3, [r7]
.L5:
        movs    r3, #0
        mov     r0, r3
        adds    r7, r7, #20
        mov     sp, r7
        ldr     r7, [sp], #4
        bx      lr