global _start
_start:
%macro disp 2
mov rax,1
mov rdi,1
mov rsi,%1
mov rdx,%2
syscall
%endm

%macro accept 2
mov rax,0
mov rdi,0
mov rsi,%1
mov rdx,%2
syscall
%endm
disp msg1,len1
accept num,length1
call convert
mov [num1],al
disp msg2,len2
accept num,length1
call convert
mov [num2],al
mov ax,[num1]
mov bx,[num2]
mov cx,0000h
a2:
shr bx,01
jnc a1
add [res],ax
a1:
shl ax,01
cmp ax,00h
jz a3
cmp bx,00h
jnz a2
a3:
disp msg3,len3
mov ax,[res]
call display
mov rax,60
mov rdi,0
syscall

convert:
mov rsi,num
mov al,[rsi]
cmp al,39h
jbe l1
sub al,07h
l1:
sub al,30h
rol al,04
mov bl,al
inc rsi
mov al,[rsi]
cmp al,39h
jbe l2
sub al,07h
l2:
sub al,30h
add al,bl
ret

display:
mov rsi,disparr+3;
mov rcx,04;
q2:
mov rdx,0;
mov rbx,10h;
div rbx;
cmp dl,09h;
jbe q1;
add dl,07h;
q1:
add dl,30h;
mov [rsi],dl;
dec rsi
dec rcx;
jnz q2

mov rax,1;
mov rdi,1;
mov rsi,disparr;
mov rdx,04
syscall

ret

section .data
msg1 db "Enter first number"
len1 equ $-msg1
msg2 db "Enter second number"
len2 equ $-msg2
msg3 db "result:"
len3 equ $-msg3
msg4 db " "
len4 equ $-msg4

section .bss
num1 resb 10
num resb 10
num2 resb 10
res resb 10
length1 resb 02
disparr resb 32