fixed the SetImplementation with new register instructions

lib/register/instructions/get_slot.rb

@@ -0,0 +1,16 @@
+module Register
+  # offset memory get access
+  # so the value to be set must be given as the first register
+  # the second argument holds the base address
+  # and the third a possible (small) offset into the "object"
+  #
+  # if for example the value is pointed to by a register, a VariableGet (load) is needed first
+  class GetSlot < Instruction
+    def initialize value , reference , index = 0
+      @value = value
+      @reference = reference
+      @index = index
+    end
+    attr_accessor :value , :reference , :index
+  end
+end

lib/register/instructions/load_constant.rb

@@ -0,0 +1,14 @@
+module Register
+  # load a constant into a register
+  #
+  # first arguemnt is the register the constant is loaded into 
+  # second is the actual constant
+ 
+  class LoadConstant < Instruction
+    def initialize value , constant
+      @value = value
+      @constant = constant
+    end
+    attr_accessor :value , :constant 
+  end
+end

lib/register/instructions/set_slot.rb

@@ -0,0 +1,16 @@
+module Register
+  # offset memory set access
+  # so the value must be given as the first register
+  # the second argument holds the base address
+  # and the third a possible (small) offset into the "object"
+  #
+  # if for example the value is pointed to by a register, a VariableGet (load) is needed first
+  class SetSlot < Instruction
+    def initialize value , reference , index = 0
+      @value = value
+      @reference = reference
+      @index = index
+    end
+    attr_accessor :value , :reference , :index
+  end
+end