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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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