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##  DESCRIPTION:
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##  AUTHOR:	C. Cérin <christophe.cerin@lipn.univ-paris13.fr>
##  DATE: 	February 3, 2006
##  VERSION:	1.0
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## Data Segment
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	.data
STR1:	.asciiz "Please enter a number (0 to stop): "
STR2:	.asciiz "Result is "
NL:	.asciiz ".\n"

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## Text Segment
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	.text
	.globl main
#-----------------------------------------------------------
# Main Start
#-----------------------------------------------------------
main:	addi	$s0, $zero, 0	# $s0 = 0
	addi	$s1, $zero, 0	# $s1 = 0
	addi	$s2, $zero, 0	# $s0 = 0
loop:	li	$v0, 4		# system call for print_str
	la	$a0, STR1	# address of string to print
	syscall			# print the string

	li	$v0, 5		# system call for read_int
	syscall			# read the integer

	## Check if $v0 == 0, if true goto exit
	beq	$v0, $zero, exit

	## Result from read_int is stored in $v0
	add	$s0, $s0, $v0	#
	blez    $v0, loop1
	add     $s2, $s2, $v0	#
	j	loop		# goto loop
loop1:	add	$s1, $s1, $v0	#
	j	loop

	## Here is $v0 == 0, print out sum at this point
exit:	li	$v0, 4		# system call code for print_str
	la	$a0, STR2	# address of string to print
	syscall			# print the string

	li	$v0, 1		# system call code for print_int
	add	$a0, $s0, $zero	# integer to print,
	syscall			# print the integer

	li	$v0, 4		# system call code for print_str
	la	$a0, NL		# address of string to print
	syscall			# print the string

	li	$v0, 4		# system call code for print_str
	la	$a0, STR2	# address of string to print
	syscall			# print the string

	li	$v0, 1		# system call code for print_int
	add	$a0, $s1, $zero	# integer to print,
	syscall			# print the integer

	li	$v0, 4		# system call code for print_str
	la	$a0, NL		# address of string to print
	syscall			# print the string

	li	$v0, 4		# system call code for print_str
	la	$a0, STR2	# address of string to print
	syscall			# print the string

	li	$v0, 1		# system call code for print_int
	add	$a0, $s2, $zero	# integer to print,
	syscall			# print the integer

	li	$v0, 4		# system call code for print_str
	la	$a0, NL		# address of string to print
	syscall			# print the string

	jr	$ra		# exit program
#-----------------------------------------------------------
# Main End
#-----------------------------------------------------------