slightly better return implementation

lib/register/return_implementation.rb

@@ -3,8 +3,12 @@ module Register
     def run block
       block.codes.dup.each do |code|
         next unless code.is_a? Virtual::MethodReturn
-#        call = RegisterMachine.instance.call( code.method )
-        block.replace(code , [] )
+        to = RegisterReference.new(:r0)
+        tmp = RegisterReference.new(:r5)
+        pc = RegisterReference.new(:pc)
+        move1 = RegisterMachine.instance.ldr( to , tmp , 3 ) #TODO 3 == return reg, needs constant / layout
+        move2 = RegisterMachine.instance.ldr( pc , tmp )
+        block.replace(code , [move1,move2] )
       end
     end
   end