adds multiplication

without overflow testing, like the others

lib/risc/boot.rb

@@ -184,7 +184,7 @@ module Risc
       end
 
       obj = space.get_class_by_name(:Integer)
-      [ :putint, :mod4, :div10, :+ , :-].each do |f|   #mod4 is just a forward declaration
+      [ :putint, :mod4, :div10, :+ , :- , :*].each do |f|   #mod4 is just a forward declaration
         obj.instance_type.add_method Builtin::Integer.send(f , nil)
       end
     end

lib/risc/builtin/integer.rb

@@ -23,6 +23,9 @@ module Risc
           compiler.add_mom( Mom::ReturnSequence.new)
           return compiler.method
         end
+        def *( context )
+          operator_method( "mult" , :*)
+        end
         def +( context )
           operator_method( "plus" , :+)
         end

test/parfait/test_space.rb

@@ -34,7 +34,7 @@ class TestSpace < MiniTest::Test
 
   def test_integer
     int = Parfait.object_space.get_class_by_name :Integer
-    assert_equal 5, int.instance_type.method_names.get_length
+    assert_equal 6, int.instance_type.method_names.get_length
   end
 
   def test_classes_class

test/risc/interpreter/test_mult.rb

@@ -0,0 +1,52 @@
+require_relative "helper"
+
+module Risc
+  class InterpreterMultTest < MiniTest::Test
+    include Ticker
+
+    def setup
+      @string_input = as_main "return #{2**31} * #{2**31}"
+      super
+    end
+
+    def test_mult
+      #show_ticks # get output of what is
+      check_chain [Branch, Label, LoadConstant, SlotToReg, LoadConstant,
+             SlotToReg, SlotToReg, RegToSlot, LoadConstant, SlotToReg,
+             SlotToReg, SlotToReg, SlotToReg, RegToSlot, LoadConstant,
+             SlotToReg, SlotToReg, SlotToReg, SlotToReg, RegToSlot,
+             SlotToReg, RegToSlot, LoadConstant, RegToSlot, FunctionCall,
+             Label, LoadConstant, SlotToReg, SlotToReg, RegToSlot,
+             LoadConstant, SlotToReg, SlotToReg, SlotToReg, SlotToReg,
+             RegToSlot, LoadConstant, SlotToReg, SlotToReg, SlotToReg,
+             SlotToReg, RegToSlot, LoadConstant, SlotToReg, RegToSlot,
+             LoadConstant, SlotToReg, SlotToReg, RegToSlot, LoadConstant,
+             SlotToReg, RegToSlot, SlotToReg, LoadConstant, FunctionCall,
+             Label, SlotToReg, SlotToReg, SlotToReg, SlotToReg,
+             SlotToReg, OperatorInstruction, LoadConstant, SlotToReg, SlotToReg,
+             RegToSlot, RegToSlot, RegToSlot, SlotToReg, SlotToReg,
+             RegToSlot, SlotToReg, SlotToReg, FunctionReturn, SlotToReg,
+             SlotToReg, RegToSlot, SlotToReg, SlotToReg, RegToSlot,
+             SlotToReg, SlotToReg, RegToSlot, SlotToReg, SlotToReg,
+             FunctionReturn, Transfer, Syscall, NilClass]
+       assert_equal Parfait::Integer , get_return.class
+       assert_equal 0 , get_return.value
+    end
+    def test_op
+      op = ticks(62)
+      assert_equal OperatorInstruction , op.class
+      assert_equal :r1 , op.left.symbol
+      assert_equal :r2 , op.right.symbol
+      assert_equal 2**31 , @interpreter.get_register(:r2)
+      assert_equal 0 , @interpreter.get_register(:r1)
+    end
+    def test_overflow
+      ticks( 62 )
+      assert @interpreter.flags[:overflow]
+    end
+    def test_zero
+      ticks( 12 )
+      assert @interpreter.flags[:zero]
+    end
+  end
+end

test/risc/interpreter/wip/test_mult.rb

@@ -1,40 +0,0 @@
-require_relative "../helper"
-
-module Risc
-  class MultTest < MiniTest::Test
-    include Ticker
-    include AST::Sexp
-
-    def setup
-      @string_input = <<HERE
-  class Space
-    int main()
-      return #{2**31} * #{2**31}
-    end
-  end
-HERE
-      @input = s(:statements, s(:return, s(:operator_value, :*, s(:int, 2147483648), s(:int, 2147483648))))
-      super
-    end
-
-    def pest_mult
-      #show_ticks # get output of what is
-      check_chain [Branch, Label, LoadConstant, SlotToReg, RegToSlot,
-             LoadConstant, RegToSlot, FunctionCall, Label, LoadConstant,
-             LoadConstant, OperatorInstruction, RegToSlot, LoadConstant, SlotToReg,
-             RegToSlot, Label, FunctionReturn, Transfer, Syscall,
-             NilClass]
-       check_return 0
-    end
-    def pest_overflow
-      ticks( 12 )
-      assert @interpreter.flags[:overflow]
-    end
-
-    def pest_zero
-      ticks( 12 )
-      assert @interpreter.flags[:zero]
-    end
-
-  end
-end