section .data
    msg db "Hello world!"
    N db 10

section .text
    global _start

_start:
    mov rbx,12
loop_start:

    cmp rbx, 0      ; rax と 0 を比較
    je loop_end
    
    mov rax, 1
    mov rdi, 1
    mov rsi, msg
    mov rdx, rbx
    syscall


    mov rax, 1
    mov rdi, 1
    mov rsi, N
    mov rdx, 1
    syscall
    
    sub rbx, 1     
    jmp loop_start 
loop_end:
    mov rax, 60
    mov rdi, 0
    syscall