bring the blocks down to mom level

reusing message_setup, but adding yield specific instructions

lib/risc/builder.rb

@@ -55,6 +55,7 @@ module Risc
       name = :word if name == :name
       name = :message if name == :next_message
       name = :message if name == :caller
+      name = :named_list if name == :arguments
       sym = name.to_s.camelise.to_sym
       clazz = Parfait.object_space.get_class_by_name(sym)
       raise "Not implemented/found object #{name}:#{sym}" unless clazz

lib/risc/instructions/branch.rb

@@ -44,6 +44,14 @@ module Risc
     attr_reader :register
   end
 
+  # A Dynamic yield is very much like a DynamicJump, especially in it's idea
+  #
+  # The implentation differes slightly, as we use a chache entry in the DynamicJump
+  # but a block in the DynamicYield.
+  # Using means that we assume the register to be ready loaded with a Block
+  class DynamicYield < DynamicJump
+  end
+
   class IsZero < Branch
   end