# This file is:  testmain.s
#	It is a simple infinite loop that adds up a list of numbers,
#	over and over again.
#
# Assumption:
#	File "lab5.trap.handler.s" contains your modified
#	Exception/Interrupt handler, which includes at a minimum:
#
#	1.  A .ktext 0x80000080 segment
#	2.  A label "__start", defined in the usual way:
#			.text
#			.globl __start
#	3.  A call to global label "main", in the usual way.
#
# Run with:
#	spim -file testmain.s
#   or
#	cat lab5.trap.handler.s testmain.s > lab5.trap.s
#	spim -mapped_io -notrap -file lab5.trap.s


	.text			# Added Nov. 22/01 (user space)
	.globl main
main:
	li $v0, 4		# syscall 4 (print_str)
	la $a0, greeting
	syscall

startSum:
	li $t0,0		# Array Index
	li $t1,0		# Sum
sumTop:
	lw $t2,numbers($t0)
	add $t1,$t1,$t2
	beq $t2,$0,printSum	# Stop at zero number
	addi $t0,$t0,4		# Next

## Delay loop
	move $t3,$t1
	mul $t3,$t3,1000
delayTop:
	sub $t3,$t3,1
	bgtz $t3,delayTop


	b sumTop		# Add next number

printSum:
	li $v0,1		# syscall 1 (print_int)
        move $a0,$t1
	syscall

	li $v0, 4		# syscall 4 (print_str)
	la $a0, sumLabel
	syscall

	b startSum		# Infinite loop

#---------------------
#	Data Segment
#---------------------
	.data
	.align 2
numbers:
	.word	1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20
	.word	21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40
	.word	0

greeting:
	.asciiz	"Hello, I like to add up numbers.\n"

sumLabel:
	.asciiz	" is the sum I get.\n"