.globl main

main:
	push 	%rbp           	# keep stack aligned
	mov	$0, %r12	#r12 is sum; initialize
loop:
	# Print the prompt
	mov  	$0, %rax       	# clear AL (zero FP args in XMM registers)
	leaq 	prmpt(%rip), %rdi  	
				# load format string to proper register
	call    printf          # print it
	# Read int
	leaq 	f(%rip), %rdi  	# load format string
	leaq 	val(%rip), %rsi # set storage to address of x
	call 	scanf		
	# update the sum
	mov  	val(%rip), %rsi # load value from memory
	add	%rsi, %r12 	# Add value to the sum
	# Not efficient as we may add 0 to sum - See sumList2
	cmp	$0, %rsi	# Did they enter 0?
	jne	loop		# if not, back to get next value
	# Report result
	leaq 	res(%rip), %rdi # load format string
	mov  	%r12, %rsi 	# must load value from memory!!
	xor     %rax, %rax      # Another way to 0 out %rax; wish I knew why
	call    printf          #print it
	pop 	%rbp
	ret

.data
prmpt: 	.string "Enter an int. 0 Quits >"
				# Prompt
f:  	.string "%d"	     	# Format for input has only specifiers
res:	.string "Total:%d\n"
val:  	.long 0			# Variable (global) holding value read