##########
# control.s for use in CSE351 Lec 9 on Condition Codes
#
# Use "print $eflags" to view condition flags in gdb
##########

	.text
	.globl	absdiff
	.type	absdiff, @function
absdiff:
	cmpq	%rsi, %rdi		# jump to .L2 if %rdi <= %rsi,
	jle	.L2			#    i.e. !(x>y)

	movq	%rdi, %rax		# return x - y
	subq	%rsi, %rax
	ret
.L2:
	movq	%rsi, %rax		# return y - x
	subq	%rdi, %rax
	ret
	.size	absdiff, .-absdiff
	.globl	compound
	.type	compound, @function
compound:
	cmpq	$3, %rdi	
	setl	%al
	cmpq	%rsi, %rdi
	sete	%bl
	testb	%al, %bl
	je	.L6
	movq	$1, %rax
	ret
.L6:
	movq	$2, %rax
	ret
	.size	compound, .-compound
	.globl	main
	.type	main, @function
main:
	movl	$4, %esi
	movl	$5, %edi
	call	absdiff			# absdiff(5,4) = 1
	movq	%rax, %rsi
	movl	$1, %edi
	call	compound		# compound(1,1) = 2
	rep ret
	.size	main, .-main