1 /********************************************************************** 2 Copyright(c) 2011-2016 Intel Corporation All rights reserved. 3 4 Redistribution and use in source and binary forms, with or without 5 modification, are permitted provided that the following conditions 6 are met: 7 * Redistributions of source code must retain the above copyright 8 notice, this list of conditions and the following disclaimer. 9 * Redistributions in binary form must reproduce the above copyright 10 notice, this list of conditions and the following disclaimer in 11 the documentation and/or other materials provided with the 12 distribution. 13 * Neither the name of Intel Corporation nor the names of its 14 contributors may be used to endorse or promote products derived 15 from this software without specific prior written permission. 16 17 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 **********************************************************************/ 29 30 #ifndef _ENDIAN_HELPER_H_ 31 #define _ENDIAN_HELPER_H_ 32 33 /** 34 * @file endian_helper.h 35 * @brief Byte order helper routines 36 * 37 */ 38 39 #ifdef __cplusplus 40 extern "C" { 41 #endif 42 43 #if defined(__ICC) 44 #define byteswap32(x) _bswap(x) 45 #define byteswap64(x) _bswap64(x) 46 #elif defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) 47 #define byteswap32(x) __builtin_bswap32(x) 48 #define byteswap64(x) __builtin_bswap64(x) 49 #else 50 #define byteswap32(x) (((x) << 24) | (((x) & 0xff00) << 8) | (((x) & 0xff0000) >> 8) | ((x) >> 24)) 51 #define byteswap64(x) \ 52 ((((x) & (0xffull << 0)) << 56) | (((x) & (0xffull << 8)) << 40) | \ 53 (((x) & (0xffull << 16)) << 24) | (((x) & (0xffull << 24)) << 8) | \ 54 (((x) & (0xffull << 32)) >> 8) | (((x) & (0xffull << 40)) >> 24) | \ 55 (((x) & (0xffull << 48)) >> 40) | (((x) & (0xffull << 56)) >> 56)) 56 #endif 57 58 // This check works when using GCC (or LLVM). Assume little-endian 59 // if any other compiler is being used. 60 #if defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \ 61 __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 62 #define to_le32(x) byteswap32(x) 63 #define to_le64(x) byteswap64(x) 64 #define to_be32(x) (x) 65 #define to_be64(x) (x) 66 #else 67 #define to_le32(x) (x) 68 #define to_le64(x) (x) 69 #define to_be32(x) byteswap32(x) 70 #define to_be64(x) byteswap64(x) 71 #endif 72 73 #ifdef __cplusplus 74 } 75 #endif 76 77 #endif // _ISA_HELPER_H_ 78