| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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; |
