rename register to risc

seems to fit the layer much better as we really have a very reduced
instruction set

lib/risc/builtin/object.rb

@@ -0,0 +1,40 @@
+require_relative "compile_helper"
+
+module Risc
+  module Builtin
+    class Object
+      module ClassMethods
+        include CompileHelper
+
+        # self[index] basically. Index is the first arg
+        # return is stored in return_value
+        # (this method returns a new method off course, like all builtin)
+        def get_internal_word context
+          compiler = compiler_for(:Object , :get_internal_word )
+          source = "get_internal_word"
+          me , index = self_and_int_arg(compiler,source)
+          # reduce me to me[index]
+          compiler.add_slot_to_reg( source , me , index , me)
+          # and put it back into the return value
+          compiler.add_reg_to_slot( source , me , :message , :return_value)
+          return compiler.method
+        end
+
+        # self[index] = val basically. Index is the first arg , value the second
+        # no return
+        def set_internal_word context
+          compiler = compiler_for(:Object , :set_internal_word , {:value => :Object} )
+          source = "set_internal_word"
+          me , index = self_and_int_arg(compiler,source)
+          value = load_int_arg_at(compiler,source , 2)
+
+          # do the set
+          compiler.add_reg_to_slot( source , value , me , index)
+          return compiler.method
+        end
+
+      end
+      extend ClassMethods
+    end
+  end
+end