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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . B Y T E _ S W A P P I N G --
-- --
-- S p e c --
-- --
-- Copyright (C) 2006-2012, AdaCore --
-- --
-- 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 3, 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- Intrinsic routines for byte swapping. These are used by the expanded code
-- (supporting alternative byte ordering), and by the GNAT.Byte_Swapping run
-- time package which provides user level routines for byte swapping.
package System.Byte_Swapping is
pragma Pure;
type U16 is mod 2**16;
type U32 is mod 2**32;
type U64 is mod 2**64;
function Bswap_16 (X : U16) return U16;
pragma Import (Intrinsic, Bswap_16, "__builtin_bswap16");
function Bswap_32 (X : U32) return U32;
pragma Import (Intrinsic, Bswap_32, "__builtin_bswap32");
function Bswap_64 (X : U64) return U64;
pragma Import (Intrinsic, Bswap_64, "__builtin_bswap64");
end System.Byte_Swapping;
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