lab4ass1.asm

#Laboratory Exercise 4, Sample Code 1
.text
	li 	$s1, 10
	li	$s2, 12

start:
	li	$t0,0		# No overflow is set as default status
	addu	$s3,$s1,$s2	# s3 = s1 + s2
	xor	$t1,$s1,$s2	# Check if $s1 and $s2 have the same                
				# sign?
	bltz	$t1,EXIT	# If not, exit
	slt	$t2,$s3,$s1
	bltz	$s1,NEGATIVE	# Check if $s1and $s2 is negative?
	beq	$t2,$zero,EXIT	# s1 and$s2are positive
				# If$s3>$s1then the result doesnot 
				# overflow
	j	OVERFLOW
NEGATIVE:
	bne	$t2,$zero,EXIT	# s1 and $s2 are negative
				# If $s3 < $s1 then the result 
				# does not overflow
OVERFLOW:
	li	$t0,1		#The result overflows
EXIT: