http://www.girmont.org/index.php?2021/05/02/5837-soupe-de-hannetons-soupe-de-printemps

"""
section .data
result dd 1
n dd 5
msg db "Factorial: ", 0
result_msg db 0, 0

section .bss
temp resd 1

section .text
global _start

_start:
mov eax, [n]
mov ecx, eax
mov ebx, 1

factorial_loop:
cmp ecx, 1
je end_factorial
mul ecx
dec ecx
jmp factorial_loop

end_factorial:
mov [result], eax

mov eax, 4
mov ebx, 1
mov ecx, msg
mov edx, 11
int 0x80

mov eax, 1
xor ebx, ebx
int 0x80
"""

mov ebx, 1

cmp eax, 1
jle 1
mul ebx
dec eax
jmp 2

1:
hlt