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1 281 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                         GNAT COMPILER COMPONENTS                         --
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--                                                                          --
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--             S Y S T E M . A D D R E S S _ O P E R A T I O N S            --
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--                                                                          --
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--                                 B o d y                                  --
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--                                                                          --
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--          Copyright (C) 2004-2009, Free Software Foundation, Inc.         --
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--                                                                          --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- terms of the  GNU General Public License as published  by the Free Soft- --
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-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
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-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
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--                                                                          --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception,   --
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-- version 3.1, as published by the Free Software Foundation.               --
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--                                                                          --
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-- You should have received a copy of the GNU General Public License and    --
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-- a copy of the GCC Runtime Library Exception along with this program;     --
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-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
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-- <http://www.gnu.org/licenses/>.                                          --
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--                                                                          --
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-- GNAT was originally developed  by the GNAT team at  New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc.      --
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--                                                                          --
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------------------------------------------------------------------------------
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pragma Compiler_Unit;
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with Ada.Unchecked_Conversion;
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package body System.Address_Operations is
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   type IA is mod 2 ** Address'Size;
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   --  The type used to provide the actual desired operations
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   function I is new Ada.Unchecked_Conversion (Address, IA);
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   function A is new Ada.Unchecked_Conversion (IA, Address);
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   --  The operations are implemented by unchecked conversion to type IA,
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   --  followed by doing the intrinsic operation on the IA values, followed
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   --  by converting the result back to type Address.
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   ----------
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   -- AddA --
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   ----------
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   function AddA (Left, Right : Address) return Address is
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   begin
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      return A (I (Left) + I (Right));
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   end AddA;
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   ----------
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   -- AndA --
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   ----------
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   function AndA (Left, Right : Address) return Address is
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   begin
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      return A (I (Left) and I (Right));
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   end AndA;
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   ----------
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   -- DivA --
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   ----------
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   function DivA (Left, Right : Address) return Address is
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   begin
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      return A (I (Left) / I (Right));
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   end DivA;
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   ----------
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   -- ModA --
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   ----------
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   function ModA (Left, Right : Address) return Address is
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   begin
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      return A (I (Left) mod I (Right));
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   end ModA;
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   ---------
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   -- MulA --
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   ---------
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   function MulA (Left, Right : Address) return Address is
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   begin
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      return A (I (Left) * I (Right));
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   end MulA;
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   ---------
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   -- OrA --
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   ---------
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   function OrA (Left, Right : Address) return Address is
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   begin
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      return A (I (Left) or I (Right));
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   end OrA;
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   ----------
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   -- SubA --
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   ----------
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   function SubA (Left, Right : Address) return Address is
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   begin
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      return A (I (Left) - I (Right));
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   end SubA;
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end System.Address_Operations;

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