# NOTE - THIS IS NOT A THOROUGH TEST.  YOURS SHOULD BE MORE THOROUGH THAN THIS.
# THE FACT THAT WE WERE ABLE TO CATCH ERRORS WITH THIS PROGRAM IMPLIES THAT
# MANY OF YOU DIDN'T TEST ENOUGH.
# It would be wise to have one partner think of crazy test cases if s/he
# is ever sitting idly while the other partner works.

#addu, addiu, subu
#sltiu, sltu
#ori, or
#lw, sw

	#load some constants first

main:	
	addiu $0, $1, 1		# Either nothing should be written to 0 or
	addiu $0, $0, -1	# it should go from 0x00000001 to 0xffffffff.
				# If it changes to 0x00000001 and then back
				# to 0, then you didn't hard code your 0
				# register.

	addiu $20, $0, 1	# Load some constants
	addiu $30, $0, -1	
	addiu $29, $0, 2
	addiu $28, $0, -2
	addiu $27, $0, 0xFF00
	addiu $26, $0, 0x00FF

	#add,sub
	addu  $1, $20, $29	#should get $1 = 3 (0x00000001 + 0x00000002)
	addiu $2, $27, 0xF0	#should get $2 = 0xFFFFFFF0
				#(0xffffff00 + 0x000000f0)
	subu  $3, $29, $20	#should get $3 = 1 (0x00000002 - 0x00000001)

	#slt
	sltu  $4, $0, $20	#should get $4 = 1 (0x00000000 < 0x00000001)
	sltiu $5, $26, 0xFFFF	#should get $5 = 1 (0x000000ff < 0xffffffff)
				#(unsigned)

	#or
	or    $6, $26, $27	#should get $6 = 0xFFFFFFFF
				#(0x000000ff | 0xffffff00)
	ori   $7, $26, 0xFF00   #$7 = 0x0000FFFF (no sign-extend)
				#(0x000000ff | 0x0000ff00)
	
	#sw, lw, offsets
	addiu $25, $0, 520
	addiu $24, $0, 524
	addiu $23, $0, 528
	sw    $26, 0($24)	#store 0xff
	lw    $8, 0($24)	#three loads, should all load 0xff
	lw    $9, 4($25)	#into $8, $9, $10
	lw    $10, -4($23)