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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S Y S T E M . A D D R E S S _ O P E R A T I O N S --
-- --
-- B o d y --
-- --
-- Copyright (C) 2004-2007, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
pragma Warnings (Off);
pragma Compiler_Unit;
pragma Warnings (On);
with Ada.Unchecked_Conversion;
package body System.Address_Operations is
type IA is mod 2 ** Address'Size;
-- The type used to provide the actual desired operations
function I is new Ada.Unchecked_Conversion (Address, IA);
function A is new Ada.Unchecked_Conversion (IA, Address);
-- The operations are implemented by unchecked conversion to type IA,
-- followed by doing the intrinsic operation on the IA values, followed
-- by converting the result back to type Address.
----------
-- AddA --
----------
function AddA (Left, Right : Address) return Address is
begin
return A (I (Left) + I (Right));
end AddA;
----------
-- AndA --
----------
function AndA (Left, Right : Address) return Address is
begin
return A (I (Left) and I (Right));
end AndA;
----------
-- DivA --
----------
function DivA (Left, Right : Address) return Address is
begin
return A (I (Left) / I (Right));
end DivA;
----------
-- ModA --
----------
function ModA (Left, Right : Address) return Address is
begin
return A (I (Left) mod I (Right));
end ModA;
---------
-- MulA --
---------
function MulA (Left, Right : Address) return Address is
begin
return A (I (Left) * I (Right));
end MulA;
---------
-- OrA --
---------
function OrA (Left, Right : Address) return Address is
begin
return A (I (Left) or I (Right));
end OrA;
----------
-- SubA --
----------
function SubA (Left, Right : Address) return Address is
begin
return A (I (Left) - I (Right));
end SubA;
end System.Address_Operations;
|
