fix interpreter overflow issue

flag set for bigness, result reduced
tests for + and *
fixed fibs tests

test/interpreter/helper.rb

@@ -21,6 +21,11 @@ module Ticker
     end
   end
 
+  def check_return val
+    assert_equal Parfait::Message , @interpreter.get_register(:r0).class
+    assert_equal val , @interpreter.get_register(:r0).return_value
+  end
+
   def ticks num
     last = nil
     num.times do

test/interpreter/test_all.rb

@@ -1,4 +1,5 @@
 require_relative "test_add"
 require_relative "test_if"
 require_relative "test_puts"
-require_relative "test_ops"
+require_relative "test_plus"
+require_relative "test_mult"

test/interpreter/test_if.rb

@@ -1,6 +1,6 @@
 require_relative "helper"
 
-class AddTest < MiniTest::Test
+class IfTest < MiniTest::Test
   include Ticker
 
   def setup

test/interpreter/test_mult.rb

@@ -1,6 +1,6 @@
 require_relative "helper"
 
-class AddTest < MiniTest::Test
+class MultTest < MiniTest::Test
   include Ticker
   include AST::Sexp
 
@@ -8,35 +8,29 @@ class AddTest < MiniTest::Test
     @string_input = <<HERE
 class Object
   int main()
-    return 5 + 10
+    return #{2**31} * #{2**31}
   end
 end
 HERE
     super
   end
 
-  def test_add
-    #show_ticks # get output of what is
-    check_chain ["Branch","Label","LoadConstant","GetSlot","SetSlot",
-     "LoadConstant","SetSlot","FunctionCall","Label","LoadConstant",
-     "LoadConstant","OperatorInstruction","SetSlot","Label","FunctionReturn",
-     "RegisterTransfer","Syscall","NilClass"]
-  end
-
   def test_mult
-    @string_input = <<HERE
-class Object
-  int main()
-    return 5 * 10
-  end
-end
-HERE
-    setup
     #show_ticks # get output of what is
     check_chain ["Branch","Label","LoadConstant","GetSlot","SetSlot",
      "LoadConstant","SetSlot","FunctionCall","Label","LoadConstant",
      "LoadConstant","OperatorInstruction","SetSlot","Label","FunctionReturn",
      "RegisterTransfer","Syscall","NilClass"]
+     check_return 0
+  end
+  def test_overflow
+    ticks( 12 )
+    assert @interpreter.flags[:overflow]
+  end
+
+  def test_zero
+    ticks( 12 )
+    assert @interpreter.flags[:zero]
   end
 
 end

test/interpreter/test_plus.rb

@@ -0,0 +1,35 @@
+require_relative "helper"
+
+class PlusTest < MiniTest::Test
+  include Ticker
+
+  def setup
+    @string_input = <<HERE
+class Object
+  int main()
+    return #{2**62 - 1} + 1
+  end
+end
+HERE
+    super
+  end
+
+  def test_add
+    #show_ticks # get output of what is
+    check_chain ["Branch","Label","LoadConstant","GetSlot","SetSlot",
+     "LoadConstant","SetSlot","FunctionCall","Label","LoadConstant",
+     "LoadConstant","OperatorInstruction","SetSlot","Label","FunctionReturn",
+     "RegisterTransfer","Syscall","NilClass"]
+    check_return 0
+  end
+
+  def test_overflow
+    ticks( 12 )
+    assert @interpreter.flags[:overflow]
+  end
+
+  def test_zero
+    ticks( 12 )
+    assert @interpreter.flags[:zero]
+  end
+end