# we need to change to use the stack

	.text
main:
main_prologue:
	begin
	push	$ra

	li	$v0, 4					
	la	$a0, main_msg1
	syscall						#printf("calling function f\n");
						
	
	li	$a0, 22
	jal	f					#f(22)
	move	$t1, $v0				#$t1 has return result

	li	$v0, 4					#printf("back from function f\n");
	la	$a0, main_msg2
	syscall

	li 	$v0, 1					#printf("%d", result);
	move	$a0, $t1
	syscall


	li	$v0, 0					#return 0
	
main_epilogue:
	pop	$ra					 
	end

	jr	$ra

f:
	# Make sure we do not overwrite our argument x
	# Arguments: x $a0 ->$t1
	move	$t1, $a0 
	li	$v0, 4
	la	$a0, f_msg1
	syscall						#printf("in function f\n");
	
	li 	$v0, 1					#printf("%d", x);
	move 	$a0, $t1
	syscall

	li 	$v0, 11
	li 	$a0, '\n'
	syscall						

	mul	$v0, $t1, 2				#return x * 2
							
	jr	$ra

	.data
main_msg1:
	.asciiz "calling function f\n"
main_msg2:
	.asciiz "back from function f\n"
f_msg1:
	.asciiz "in function f\n"