sum2:	pushl %esi              # registre callee-save	
        pushl %edi              # registre callee-save	
        pushl %ebx              # registre callee-save	
        mrmovl 16(%esp),%esi	# param n
	mrmovl 20(%esp),%edi	# param t
	irmovl 0,%ebx		# res = 0
loop2:	isubl 1,%esi		# n--
	jl end2			# fin si n < 0	
	mrmovl (%edi),%eax	# x=*t
	pushl %eax		# empiler x
	call square		# square(x)
	iaddl 4,%esp		# depiler x
	addl %eax,%ebx		# res += x^2
	iaddl 4,%edi		# t += 4
	jmp loop2
end2:	rrmovl %ebx,%eax
        popl %ebx               # registre callee-save	
        popl %edi               # registre callee-save	
        popl %esi               # registre callee-save	
	ret			# retour dans %eax