a basic interpret command for cli

part of the benchmark effort
determine amount of objects

lib/rubyx/rubyxc.rb

@@ -1,5 +1,6 @@
 require "thor"
 require "rubyx"
+require "risc/interpreter"
 
 class RubyXC < Thor
   desc "compile FILE" , "Compile given FILE to binary"
@@ -27,7 +28,44 @@ class RubyXC < Thor
 
     outfile = file.split("/").last.gsub(".rb" , ".o")
     writer.save outfile
+  end
+
+  desc "interpret FILE" , "Interpret given FILE "
+  long_desc <<-LONGDESC
+      Compiles the given file to an intermediate RISC format, and runs the
+      Interpreter.
+
+      RISC is the last abstract layer inside the compiler. It is in nature
+      very close to arm (without quirks and much smaller).
+
+      An interpreter was originally developed for the RISC layer for debugging purposes.
+      Running the interpreter is about 50k slower than binary, but it can be used
+      to veryfy simple programs.
+
+      No output file will be generated, the only output is generated by the
+      given program.
+
+      The program must define a main method on the Space class, which will be invoked.
+    LONGDESC
+
+  def interpret(file)
+    begin
+      ruby = File.read(file)
+    rescue
+      fail MalformattedArgumentError , "No such file #{file}"
+    end
+    options = {
+       parfait:  { factory: 3*1024, },
+       load_parfait: false ,
+     }
+    compiler = RubyX::RubyXCompiler.new(options)
+    linker = compiler.ruby_to_binary(ruby, :interpreter)
+
+    puts "interpreting #{file}"
+
+    interpreter = Risc::Interpreter.new(linker , STDOUT )
+    interpreter.start_program
+    interpreter.tick while(interpreter.instruction)
 
-    return outfile
   end
 end