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Diffstat (limited to 'gcc-4.8.3/gcc/ada/s-bytswa.ads')
| -rw-r--r-- | gcc-4.8.3/gcc/ada/s-bytswa.ads | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/gcc-4.8.3/gcc/ada/s-bytswa.ads b/gcc-4.8.3/gcc/ada/s-bytswa.ads new file mode 100644 index 000000000..675e7d8ee --- /dev/null +++ b/gcc-4.8.3/gcc/ada/s-bytswa.ads @@ -0,0 +1,53 @@ +------------------------------------------------------------------------------ +-- -- +-- 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; |