# Execution begins at address 0
	.pos 0
init:
	irmovl Stack, %esp  	# Set up Stack pointer
	irmovl Stack, %ebp  	# Set up base pointer
	
	irmovl $8,%eax			# parameter value for pow
	pushl %eax				# Push 8
	call Pow    			# Pow(8)
	halt


/* Subroutine Pow(x) computes 2 to the power x using the dbl instruction */

Pow:
	pushl %ebp
	rrmovl %esp,%ebp
	mrmovl 8(%ebp),%ecx 	# ecx = number of times to double
	
	irmovl $1,%eax			# eax starts off as 1
Ploop:
	andl %ecx,%ecx			# set CC from ecx
	je	Pend
	dbl %eax,%ebx			# double eax store result in ebx
	rrmovl %ebx,%eax		# put result back in eax
    irmovl $-1,%edx
	addl %edx,%ecx			# dec counter
# note: the above could be just dbl %eax,%eax
	jmp Ploop

Pend:	
	popl %ebp
	ret
	.pos 0x100
Stack:	# The stack goes here