[ARM] 입력받은 숫자의 합을 2진수로 출력하기

.text
_start: .global _start

    mov r0, #0
   mov r2, #1
   mov r7, #3
    ldr r1, #3
   mov r6, #0
   mov r8, #128
   mov r9, #7
   swi 0

ldrb r5, [r1]

LOOP:
CMP r5, #10
BEQ cal

CMP r5, #49
BLT LOOP2

CMP r5, #56
BGT LOOP2

SUB r5, r5, #48
ADD r6, r6, r5

LOOP2:
   mov r0, #0
   mov r2, #1
   mov r7, #3
   ldr r1, =buf
   swi 0

ldrb r5, [r1]
B LOOP

cal:
   AND r5, r6, r8
   lsr r5, r9
    lsr r8, #1

   mov r0, #1
   mov r2, #1
   mov r7, #4
   ADD r5, r5, #48
   str r5, [r1]
   swi 0

CMP r9, #0
BEQ exit

SUB r9, r9, #1

B cal

exit:
   mov r0, #0
   mov r7, #1
   swi 0

.data
.align

buf: .skip 4

.end

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