Ej2 arqui ARM

.globl camp_squat

camp_squat:

	mov r3, #0

loop:
	cmp r1, #1
	bls end

	and r2, r1, #1
	cmp r2, #1

	addeq r3, r0
	subeq r1, #1

	lslne r0, #1
	lsrne r1, #1

	b loop

end:
	add r0, r3

	bx lr