anchor.diff:  false [if]
  -Copyright (c) 2016-2017 stoyan shopov
  +Copyright (c) 2016-2017, 2019 Stoyan Shopov
   
   Permission is hereby granted, free of charge, to any person obtaining a copy
   of this software and associated documentation files (the "Software"), to deal
  
positive.code: 	
  : DW_OP_shl ( x y -- z)
  	lshift ;
  	
  : DW_OP_ne ( x y -- z)
  	<> ( normalize result)if 1 else 0 then ;
  	
  
negative.code: 
  : DW_OP_deref ( address -- value-at-target-address)
  	t@ ;
  
  : DW_OP_plus_uconst ( x y -- x + y)
  	+ ;
  	
  