add integer minus

rework plus to make that easy

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

@@ -13,7 +13,7 @@ module Risc
           two = compiler.use_reg :fixnum , 2
           compiler.add_load_data( source , 2 , two )
           compiler.add_code Risc.op( source , :>> , me , two)
-          compiler.add_new_int(me , two)
+          compiler.add_new_int(source,me , two)
           compiler.add_reg_to_slot( source , two , :message , :return_value)
           compiler.add_mom( Mom::ReturnSequence.new)
           return compiler.method
@@ -23,16 +23,20 @@ module Risc
           compiler.add_mom( Mom::ReturnSequence.new)
           return compiler.method
         end
-
         def +( context )
-          source = "plus"
-          compiler = compiler_for(:Integer,:+ ,{other: :Integer})
-          me , other = compiler.self_and_int_arg(source + "1")
-          compiler.reduce_int( source + "2", me )
-          compiler.reduce_int( source + "3", other )
-          compiler.add_code Risc.op( source + "4", :+ , me , other)
-          compiler.add_new_int(me , other)
-          compiler.add_reg_to_slot( source + "5" , other , :message , :return_value)
+          operator_method( "plus" , :+)
+        end
+        def -( context )
+          operator_method( "minus" , :-)
+        end
+        def operator_method(op_name , op_sym )
+          compiler = compiler_for(:Integer, op_sym ,{other: :Integer})
+          me , other = compiler.self_and_int_arg(op_name + "load receiver and arg")
+          compiler.reduce_int( op_name + " fix me", me )
+          compiler.reduce_int( op_name + " fix arg", other )
+          compiler.add_code Risc.op( op_name + " operator", op_sym , me , other)
+          compiler.add_new_int(op_name + " new int", me , other)
+          compiler.add_reg_to_slot( op_name + "save ret" , other , :message , :return_value)
           compiler.add_mom( Mom::ReturnSequence.new)
           return compiler.method
         end
@@ -92,7 +96,7 @@ module Risc
           # return q + tmp
           compiler.add_code Risc.op( s , :+ , q , tmp )
 
-          compiler.add_new_int(q , tmp)
+          compiler.add_new_int(s,q , tmp)
           compiler.add_reg_to_slot( s , tmp , :message , :return_value)
 
           compiler.add_mom( Mom::ReturnSequence.new)

lib/risc/method_compiler.rb

@@ -134,8 +134,8 @@ module Risc
 
     # move a machine int from register "from" to a Parfait::Integer in register "to"
     # have to grab an integer from space and stick it in the "to" register first.
-    def add_new_int( from, to )
-      source = "add_new_int "
+    def add_new_int( source , from, to )
+      source += "add_new_int "
       space = use_reg(:Space)
       int = use_reg(:Integer)
       space_i = Risc.resolve_to_index(:Space, :next_integer)

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 4, int.instance_type.method_names.get_length
+    assert_equal 5, int.instance_type.method_names.get_length
   end
 
   def test_classes_class

test/risc/interpreter/test_minus.rb

@@ -0,0 +1,55 @@
+require_relative "helper"
+
+module Risc
+  class InterpreterMinusTest < MiniTest::Test
+    include Ticker
+
+    def setup
+      @string_input = as_main("return 6 - 5")
+      super
+    end
+
+    def test_minus
+      #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 1 , get_return.value
+    end
+    def test_load_5
+      lod = ticks( 46 )
+      assert_equal LoadConstant , lod.class
+      assert_equal Parfait::Integer , lod.constant.class
+      assert_equal 5 , lod.constant.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 5 , @interpreter.get_register(:r2)
+      assert_equal 1 , @interpreter.get_register(:r1)
+    end
+    def test_sys
+      sys = ticks(88)
+      assert_equal Syscall ,  sys.class
+      assert_equal :exit ,  sys.name
+    end
+  end
+end