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) 2004-2006 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 2, 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. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 with 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 Unchecked_Conversion (Address, IA);
42 function A is new 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;