diff --git a/lib/risc/register_value.rb b/lib/risc/register_value.rb
index d03d2af9..41328757 100644
--- a/lib/risc/register_value.rb
+++ b/lib/risc/register_value.rb
@@ -65,10 +65,13 @@ module Risc
     end
 
     # reduce integer to fixnum and add instruction if compiler is used
+    # TODO: checck type of self, should be integer
+    # TODO: find a type for the result, maybe fixnum , or data ?
+    # TODO also check types on reg_to_slot
     def reduce_int
       reduce = Risc::SlotToReg.new( "int -> fix" , self , Parfait::Integer.integer_index , self)
       compiler.add_code(reduce) if compiler
-      reduce
+      reduce.register
     end
 
     # when following variables in resolve_and_add, get a new RegisterValue
diff --git a/lib/slot_machine/callable_compiler.rb b/lib/slot_machine/callable_compiler.rb
index f4dd42c7..5fb0e710 100644
--- a/lib/slot_machine/callable_compiler.rb
+++ b/lib/slot_machine/callable_compiler.rb
@@ -69,7 +69,6 @@ module SlotMachine
       while( instruction )
         raise "whats this a #{instruction}" unless instruction.is_a?(SlotMachine::Instruction)
         #puts "adding slot #{instruction.to_s}:#{instruction.next.to_s}"
-        risc_compiler.reset_regs
         instruction.to_risc( risc_compiler )
         #puts "adding risc #{risc.to_s}:#{risc.next.to_s}"
         instruction = instruction.next
diff --git a/lib/slot_machine/macro/comparison.rb b/lib/slot_machine/macro/comparison.rb
index 81dfdb2e..79e2bf33 100644
--- a/lib/slot_machine/macro/comparison.rb
+++ b/lib/slot_machine/macro/comparison.rb
@@ -3,26 +3,36 @@ module SlotMachine
     attr_reader :operator
     def initialize(name , operator)
       super(name)
+      #TODO check operator to be in valid range
       @operator = operator.value
     end
+
+    # basically use subtract to subtract left from right (or right from left)
+    # and load true_object in the true branch and false_object in the false
+    # for the case of =, as in <= or >= we also do not check for zero
     def to_risc(compiler)
       builder = compiler.builder(compiler.source)
       operator = @operator # make accessible in block
+      false_label = Risc.label("false" , "false")
+      merge_label = Risc.label("merge" , "merge")
+      result = Risc::RegisterValue.new(:result , :Object)
       builder.build do
-        integer! << message[:receiver]
-        integer.reduce_int
-        integer_reg! << message[:arg1] #"other"
-        integer_reg.reduce_int
-        swap_names(:integer , :integer_reg) if(operator.to_s.start_with?('<') )
-        integer.op :- , integer_reg
+        left = message[:receiver].to_reg.reduce_int
+        right = message[:arg1].to_reg.reduce_int
+
+        if(operator.to_s.start_with?('<') )
+          right.op :- , left
+        else
+          left.op :- , right
+        end
         if_minus false_label
         if_zero( false_label ) if operator.to_s.length == 1
-        object! << Parfait.object_space.true_object
+        add_code Risc::LoadConstant.new(to_s , Parfait.object_space.true_object, result)
         branch merge_label
         add_code false_label
-        object << Parfait.object_space.false_object
+        add_code Risc::LoadConstant.new(to_s , Parfait.object_space.false_object, result)
         add_code merge_label
-        message[:return_value] << object
+        message[:return_value] << result
       end
       return compiler
     end
diff --git a/test/risc/test_register_value1.rb b/test/risc/test_register_value1.rb
index 64ed4340..80415264 100644
--- a/test/risc/test_register_value1.rb
+++ b/test/risc/test_register_value1.rb
@@ -5,9 +5,9 @@ module Risc
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
-      @r0 = RegisterValue.new(:message , :Message)
-      @r1 = RegisterValue.new(:id_1234 , :Space)
       @compiler = Risc.test_compiler
+      @r0 = RegisterValue.new(:message , :Message).set_compiler(@compiler)
+      @r1 = RegisterValue.new(:id_1234 , :Space).set_compiler(@compiler)
     end
 
     def test_resolves_index_ok
@@ -18,8 +18,10 @@ module Risc
     end
     def test_reduce_int
       ins = @r0.reduce_int
-      assert_equal SlotToReg , ins.class
-      assert_equal Parfait::Integer.integer_index , ins.index
+      assert_equal RegisterValue , ins.class
+      assert_equal SlotToReg , @compiler.current.class
+      assert_equal Parfait::Integer.integer_index , @compiler.current.index
+      assert_equal :message , ins.symbol
     end
     def test_get_new_left_0
       assert_equal RegisterValue , @r0.get_new_left(:caller , @compiler).class
diff --git a/test/slot_machine/macro/test_comparison.rb b/test/slot_machine/macro/test_comparison.rb
index f590a3d2..b94361d7 100644
--- a/test/slot_machine/macro/test_comparison.rb
+++ b/test/slot_machine/macro/test_comparison.rb
@@ -14,22 +14,23 @@ module SlotMachine
         assert_equal Risc::MethodCompiler , @method.to_risc.class
       end
       def test_risc_length
-        assert_equal 26 , @method.to_risc.risc_instructions.length
+        assert_equal 25 , @method.to_risc.risc_instructions.length
       end
+      #TODO, check the actual instructions, at least by class
     end
     class TestIntComp2Risc < BootTest
       def setup
-        @method = get_compiler("Integer",:gt)
+        @method = get_compiler("Integer",:ge)
       end
       def test_slot_length
-        assert_equal :> , @method.callable.name
+        assert_equal :>= , @method.callable.name
         assert_equal 7 , @method.slot_instructions.length
       end
       def test_compile
         assert_equal Risc::MethodCompiler , @method.to_risc.class
       end
       def test_risc_length
-        assert_equal 26 , @method.to_risc.risc_instructions.length
+        assert_equal 24 , @method.to_risc.risc_instructions.length
       end
     end
   end