testing fibo

lib/interpreter/interpreter.rb

@@ -192,6 +192,7 @@ module Interpreter
       else
         raise "unimplemented  '#{@instruction.operator}' #{@instruction}"
       end
+      ## result not over 2**62  => overflow 
       log.debug "#{@instruction} == #{result}   (#{left}|#{right})"
       right = set_register(@instruction.left , result)
       true