1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef _AARCH64_ENDIAN_H_ 30 #define _AARCH64_ENDIAN_H_ 31 32 #include <sys/types.h> 33 #include <sys/endian.h> 34 35 #ifdef __GNUC__ 36 37 #define __swap16md(x) ({ \ 38 register u_int16_t _x = (x); \ 39 __asm volatile ("rev16 %0, %0" : "+r" (_x)); \ 40 _x; \ 41 }) 42 43 /* Use GCC builtins */ 44 #define __swap32md(x) __builtin_bswap32(x) 45 #define __swap64md(x) __builtin_bswap64(x) 46 47 /* Tell sys/endian.h we have MD variants of the swap macros. */ 48 #define MD_SWAP 49 50 #endif /* __GNUC__ */ 51 52 #if defined(__AARCH64EB__) 53 #define _BYTE_ORDER _BIG_ENDIAN 54 #else 55 #define _BYTE_ORDER _LITTLE_ENDIAN 56 #endif 57 58 #endif /* _AARCH64_ENDIAN_H_ */ 59
