Question

Write an ARM assembly language program to translate the following sequence of statements . Assume x and y are memory locations that store two unsigned integers. Use the following: x is in R1, y is in R2, and z in R3. Make sure that your program works for any value of x and y.

if (x > 15)

{

    x = 1;

    if (y > 15) {

         y = 2;

        }

else {

      y = y + 2;

     }

}

else {

     x = x + 1;

     }

z = x + y;

I have solution but not sure! and it is not completed yet! (the solution should be something like that)

.global main

.func main

.text

.data

X :      .word

Y :

Z :

Main :

         Ldr r1, =x

         Ldr r1, [r1]

         Ldr r2, = y

         Ldr r2, [r2]

         Ldr r3, =z

         Ldr r3, [r3]

         Cmp r1, #15

         Ble falseBlock

         Mov r1, #2

else:

         add r1, r1, #1

         b end

         add r3, r1, r2

end :

         bx lr

Answer 1

main:
; storing the values
   MOV   %rsp, %rbp
   SUB   $48, %rsp
   CALL   __main
   CMP   $15, -4(%rbp)
   J   Loop2
;moving the values
   MOV   $1, -4(%rbp)
   CMP   $15, -8(%rbp)
;checkgin the condition
   jle   Loop3
   MOV   $2, -8(%rbp)
   JMP   Loop4
Loop3:
;going for the annother condition
   ADD   $2, -8(%rbp)
   jmp   Loop4
Loop2:
;going for the else condition
   ADD   $1, -4(%rbp)
Loop4:
; ending the last loop by finalizing the result
   MOV   -4(%rbp), %edx
   MOV   -8(%rbp), %eax
   MOV   %edx, %eax
   MOV   %eax, -12(%rbp)
   MOV   $0, %eax
   ADD   $48, %rsp
ENDP
END