trying to get function calls to work (but will have to rework regeister handling)

lib/arm/arm_machine.rb

@@ -31,6 +31,7 @@ module Arm
     end
     
     def word_load value , reg
+      raise "nnn " unless reg.class == Symbol
       mov( :left => reg , :right => value )
     end
     def string_load str_lit , reg