Move builtin wholesale to Mom

Since Builtin generates risc, just like mom instructions, it was a design mistake to put builtin into risc in the first place. Now that borders are coming more into focus, it make much more sense to have the builtin in mom.
In fact the instructions should be moved out and a seperate invocation mechanism used , so functions can be parsed, not generated (wip)

test/mom/builtin/test_integer.rb

@@ -0,0 +1,105 @@
+require_relative "helper"
+
+module Mom
+  module Builtin
+    class TestIntDiv4 < BootTest
+      def setup
+        super
+        @method = get_compiler(:div4)
+      end
+      def test_has_get_internal
+        assert_equal Mom::MethodCompiler , @method.class
+      end
+      def test_mom_length
+        assert_equal 5 , @method.mom_instructions.length
+      end
+      def test_compile
+        assert_equal Risc::MethodCompiler , @method.to_risc.class
+      end
+      def test_risc_length
+        assert_equal 47 , @method.to_risc.risc_instructions.length
+      end
+    end
+    class TestIntDiv10 < BootTest
+      def setup
+        super
+        @method = get_compiler(:div10)
+      end
+      def test_has_get_internal
+        assert_equal Mom::MethodCompiler , @method.class
+      end
+      def test_mom_length
+        assert_equal 5 , @method.mom_instructions.length
+      end
+      def test_compile
+        assert_equal Risc::MethodCompiler , @method.to_risc.class
+      end
+      def test_risc_length
+        assert_equal 76 , @method.to_risc.risc_instructions.length
+      end
+    end
+    class TestIntComp1 < BootTest
+      def setup
+        super
+        @method = get_compiler(:<)
+      end
+      def test_has_get_internal
+        assert_equal Mom::MethodCompiler , @method.class
+      end
+      def test_mom_length
+        assert_equal 5 , @method.mom_instructions.length
+      end
+      def test_compile
+        assert_equal Risc::MethodCompiler , @method.to_risc.class
+      end
+      def test_risc_length
+        assert_equal 28 , @method.to_risc.risc_instructions.length
+      end
+    end
+    class TestIntComp2 < BootTest
+      def setup
+        super
+        @method = get_compiler(:>=)
+      end
+      def test_has_get_internal
+        assert_equal Mom::MethodCompiler , @method.class
+      end
+      def test_mom_length
+        assert_equal 5 , @method.mom_instructions.length
+      end
+      def test_compile
+        assert_equal Risc::MethodCompiler , @method.to_risc.class
+      end
+      def test_risc_length
+        assert_equal 27 , @method.to_risc.risc_instructions.length
+      end
+    end
+    class TestIntOperators < BootTest
+      def setup
+        super
+      end
+      def each_method &block
+        Risc.operators.each do |name|
+          method = get_compiler(name)
+          block.yield(method)
+        end
+      end
+      def test_has_get_internal
+        each_method do |method|
+          assert_equal Mom::MethodCompiler , method.class
+          assert_equal 5 , method.mom_instructions.length
+        end
+      end
+      def test_compile
+        each_method do |method|
+          assert_equal Risc::MethodCompiler , method.to_risc.class
+        end
+      end
+      def test_risc_length
+        each_method do |method|
+          assert_equal 49 , method.to_risc.risc_instructions.length
+        end
+      end
+    end
+  end
+end