Lots of preloading for tests

so many relied (implicitly( on some builtin function
after all can't do much in ruby without calling
Now all those dependencies are explicit
Small risc changes come because the macro version has a return label and unreachable label

test/risc/interpreter/calling/test_div10.rb

@@ -5,12 +5,13 @@ module Risc
     include Ticker
 
     def setup
+      @preload = "Integer.div10"
       @string_input = as_main("return 25.div10")
       super
     end
 
     def test_chain
-      # show_main_ticks # get output of what is
+      #show_main_ticks # get output of what is
       check_main_chain  [LoadConstant, SlotToReg, RegToSlot, LoadConstant, SlotToReg, #5
                  RegToSlot, LoadConstant, SlotToReg, RegToSlot, SlotToReg, #10
                  FunctionCall, LoadConstant, SlotToReg, LoadConstant, OperatorInstruction, #15
@@ -22,11 +23,11 @@ module Risc
                  LoadData, OperatorInstruction, LoadData, Transfer, OperatorInstruction, #45
                  OperatorInstruction, Transfer, LoadData, OperatorInstruction, LoadData, #50
                  OperatorInstruction, OperatorInstruction, RegToSlot, RegToSlot, SlotToReg, #55
-                 SlotToReg, RegToSlot, Branch, SlotToReg, SlotToReg, #60
-                 SlotToReg, FunctionReturn, SlotToReg, RegToSlot, Branch, #65
-                 SlotToReg, SlotToReg, RegToSlot, SlotToReg, SlotToReg, #70
-                 SlotToReg, FunctionReturn, Transfer, SlotToReg, SlotToReg, #75
-                 Syscall, NilClass,] #80
+                 RegToSlot, Branch, SlotToReg, SlotToReg, RegToSlot, #60
+                 SlotToReg, SlotToReg, SlotToReg, FunctionReturn, SlotToReg, #65
+                 RegToSlot, Branch, SlotToReg, SlotToReg, RegToSlot, #70
+                 SlotToReg, SlotToReg, SlotToReg, FunctionReturn, Transfer, #75
+                 SlotToReg, SlotToReg, Syscall, NilClass,] #80
        assert_equal 2 , get_return
     end
 
@@ -36,7 +37,7 @@ module Risc
       assert_equal 25 , @interpreter.get_register(load_ins.register).value
     end
     def test_return_class
-      ret = main_ticks(72)
+      ret = main_ticks(74)
       assert_equal FunctionReturn ,  ret.class
       link = @interpreter.get_register( ret.register )
       assert_equal ::Integer , link.class