small refactor and rename

lib/register/instructions/reg_to_byte.rb

@@ -13,7 +13,7 @@ module Register
   # but index is left as is.
   # def self.reg_to_byte source , from , to , index
   #   from = resolve_to_register from
-  #   index = resolve_index( to , index)
+  #   index = resolve_to_index( to , index)
   #   to = resolve_to_register to
   #   RegToByte.new( source, from , to , index)
   # end

lib/register/instructions/reg_to_slot.rb

@@ -15,10 +15,10 @@ module Register
 
   # Produce a RegToSlot instruction.
   # From and to are registers or symbols that can be transformed to a register by resolve_to_register
-  # index resolves with resolve_index.
+  # index resolves with resolve_to_index.
   def self.reg_to_slot source , from , to , index
     from = resolve_to_register from
-    index = resolve_index( to , index)
+    index = resolve_to_index( to , index)
     to = resolve_to_register to
     RegToSlot.new( source, from , to , index)
   end

lib/register/instructions/slot_to_reg.rb

@@ -15,11 +15,11 @@ module Register
 
   # Produce a SlotToReg instruction.
   # Array and to are registers or symbols that can be transformed to a register by resolve_to_register
-  # index resolves with resolve_index.
+  # index resolves with resolve_to_index.
   def self.slot_to_reg source , array , index , to
-    index = resolve_index( array , index)
-    array = resolve_to_register array
-    to = resolve_to_register to
+    index = resolve_to_index( array , index)
+    array = resolve_to_register( array )
+    to = resolve_to_register( to )
     SlotToReg.new( source , array , index , to)
   end
 end