sum2:	mrmovl 4(%esp),%ecx	# param n
	mrmovl 8(%esp),%edx	# param t
	pushl %ebx		# registre callee-save	
	irmovl 0,%eax		# res = 0
loop2:	isubl 1,%ecx		# n--
	jl end2			# fin si n < 0	
	mrmovl (%edx),%ebx	# x=*t
	pushl %eax		# registre caller-save
	pushl %ecx		# registre caller-save
	pushl %edx		# registre caller-save	
	pushl %ebx		# empiler x
	call square		# square(x)
	iaddl 4,%esp		# depiler x
	rrmovl %eax,%ebx	# recuperation retour x^2
	popl %edx		# registre caller-save
	popl %ecx		# registre caller-save
	popl %eax		# registre caller-save	
	addl %ebx,%eax		# res += x^2
	iaddl 4,%edx		# t += 4
	jmp loop2
end2:	popl %ebx		# registre callee-save	
	ret			# retour dans %eax