# A live coding example done as a recap on functions.
# This has a simple function with 1 parameter and a return value

	.text
main:
		
main__prologue:
	begin
	push 	$ra
main__body:

	li	$t0, 10				# int max = 10
	move	$a0, $t0			# max is the argument of the function
	jal	sum_to				# int result = sum_to(max);
	move	$t0, $v0			# move the return value to $t0

	li	$v0, 4
	la	$a0, msg_sum1			# printf("Sum 1.. ");
	syscall

	li	$t1, 10				# int max = 10
	li	$v0, 1
	move	$a0, $t1			# printf("%d", max);
	syscall

	li	$v0, 11
	la	$a0, ' '
	syscall

	li	$v0, 11
	la	$a0, '='
	syscall

	li	$v0, 11
	la	$a0, ' '
	syscall

	li	$v0, 1
	move	$a0, $t0			# printf("%d", sum);
	syscall
 
    	li	$v0, 11				# putchar('\n');
	li	$a0, '\n'
	syscall
	
	li	$v0, 0				# return 0;
main__epilog:
	pop	$ra
	end
	jr 	$ra

################################################

sum_to:
	move	$t0, $a0			# move argument, max, to $t0
	li	$t1, 0				# int sum = 0;
	li	$t2, 1				# int i = 1;
sum_to_loop_cond:
	bgt	$t2, $t0, sum_to_loop_end	# if (i > n) {goto sum_to_loop_end;}
	add	$t1, $t1, $t2			# sum = sum + i;
	addi	$t2, 1				# i++;
	b	sum_to_loop_cond

sum_to_loop_end:
	move	$v0, $t1			# move sum into $v0, the return value	
	jr	$ra


	.data
msg_sum1:
	.asciiz "Sum 1.. "
msg_sum2:
	.asciiz " = "