diff --git a/Gemfile.lock b/Gemfile.lock
index 441d03e6..eb8c4d43 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,6 +1,6 @@
 GIT
   remote: git://github.com/salama/salama-arm.git
-  revision: b0eba7529c37fb5f90e73c1e8e44cc60cb2c6519
+  revision: bf9ba364343acd4afbe053a18126b87d73f43e94
   specs:
     salama-arm (0.3.0)
 
diff --git a/lib/arm/translator.rb b/lib/arm/translator.rb
index 9e538845..6faef909 100644
--- a/lib/arm/translator.rb
+++ b/lib/arm/translator.rb
@@ -64,6 +64,26 @@ module Arm
       end
     end
 
+    def translate_OperatorInstruction code
+      left = code.left
+      right = code.right
+      case code.operator.to_s
+      when "+"
+        c = ArmMachine.add(left , left , right)
+      when "-"
+        c = ArmMachine.sub(left , left , right)
+      when "&"
+        c = ArmMachine.and(left , left , right)
+      when "|"
+        c = ArmMachine.orr(left , left , right)
+      when "*"
+        c = ArmMachine.mul(left , right , left) #arm rule about left not being result, lukily commutative
+      else
+        raise "unimplemented  '#{code.operator}' #{code}"
+      end
+      c
+    end
+
     # This implements branch logic, which is simply assembler branch
     #
     # The only target for a call is a Block, so we just need to get the address for the code
diff --git a/test/parfait/test_integer.rb b/test/parfait/test_integer.rb
index 09ea6423..0bc44159 100644
--- a/test/parfait/test_integer.rb
+++ b/test/parfait/test_integer.rb
@@ -3,22 +3,26 @@ require_relative 'helper'
 class TestPutiRT < MiniTest::Test
   include RuntimeTests
 
-  def test_mod
-    @string_input = "return 5.mod(3)"
-    check_return 2
+  def test_mod4
+    [2,3,4,5,10,12].each do |m|
+      @string_input = "return #{m}.mod4()"
+      check_return m % 4
+    end
   end
-  def test_mod2
-    @string_input = "return 2.mod(4)"
-    check_return 2
+  def test_mod10
+    [2,3,4,5,10,12,55].each do |m|
+      @string_input = "return #{m}.mod10()"
+      check_return m % 10
+    end
   end
-  def test_mod3
-    @string_input = "return 2.mod(4)"
-    check_return 2
-  end
-  def test_div
-    @string_input = "return 5.div(4)"
-    check_return 1
+
+  def test_div10
+    [2,5,10,12 , 55 ].each do |m|
+      @string_input = "return #{m}.div10()"
+      check_return m / 10
+    end
   end
+  
   def test_as_char1
     @string_input = "return 5.as_char()"
     check_return 53