a creative moment, making up instructions

lib/register/instructions/function_return.rb

@@ -0,0 +1,13 @@
+module Register
+
+  # return from a function call
+  #register and index specify where the return address is stored
+
+  class FunctionReturn < Instruction
+    def initialize register , index
+      @register = register
+      @index = index
+    end
+    attr_reader :register , :index
+  end
+end

lib/register/instructions/register_transfer.rb

@@ -0,0 +1,12 @@
+module Register
+
+  #transfer the constents of one register to another. possibly called move in some cpus
+
+  class RegisterTransfer < Instruction
+    def initialize from , to
+      @from = from
+      @to = to
+    end
+    attr_reader :from, :to
+  end
+end

lib/register/instructions/save_return.rb

@@ -0,0 +1,13 @@
+module Register
+
+  # save the return address of a call
+  # register and index specify where the return address is stored
+
+  class SaveReturn < Instruction
+    def initialize register , index
+      @register = register
+      @index = index
+    end
+    attr_reader :register , :index
+  end
+end