global ft_strcmp

ft_strcmp:
	xor rdx, rdx 
	xor rax, rax
.loop:
	mov al, [rsi + rdx]
	cmp byte [rdi + rdx], al 
	jne .done
	cmp byte [rdi + rdx], 0
	je .done
	inc rdx
	jmp .loop
.done:
	movsx rax, byte [rdi + rdx]
	movsx rbx, byte [rsi + rdx]
	sub rax, rbx
	ret