1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- S Y S T E M . A D D R E S S _ O P E R A T I O N S --
9 -- Copyright (C) 2004-2009, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
18 -- As a special exception under Section 7 of GPL version 3, you are granted --
19 -- additional permissions described in the GCC Runtime Library Exception, --
20 -- version 3.1, as published by the Free Software Foundation. --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
30 ------------------------------------------------------------------------------
34 with Ada.Unchecked_Conversion;
36 package body System.Address_Operations is
38 type IA is mod 2 ** Address'Size;
39 -- The type used to provide the actual desired operations
41 function I is new Ada.Unchecked_Conversion (Address, IA);
42 function A is new Ada.Unchecked_Conversion (IA, Address);
43 -- The operations are implemented by unchecked conversion to type IA,
44 -- followed by doing the intrinsic operation on the IA values, followed
45 -- by converting the result back to type Address.
51 function AddA (Left, Right : Address) return Address is
53 return A (I (Left) + I (Right));
60 function AndA (Left, Right : Address) return Address is
62 return A (I (Left) and I (Right));
69 function DivA (Left, Right : Address) return Address is
71 return A (I (Left) / I (Right));
78 function ModA (Left, Right : Address) return Address is
80 return A (I (Left) mod I (Right));
87 function MulA (Left, Right : Address) return Address is
89 return A (I (Left) * I (Right));
96 function OrA (Left, Right : Address) return Address is
98 return A (I (Left) or I (Right));
105 function SubA (Left, Right : Address) return Address is
107 return A (I (Left) - I (Right));
110 end System.Address_Operations;