Compute Factorial

.section .data

.section .text

.globl _start

.globl factorial

_start:

push $4
call factorial
add $4, %rsp
mov %rax, %rbx
mov $1, %rax
int $0x80

.type factorial, @function

factorial:
push %rbp
mov %rsp, %rbp
mov $1, %rax
mov 8(%rbp), %rcx
start_loop:
cmp $1, %rcx
je loop_exit
imul %rcx, %rax
dec %rcx
jmp start_loop
loop_exit:
mov %rbp, %rsp
pop %rbp
ret