1 /* $OpenBSD: endian.h,v 1.7 2018/10/02 21:30:44 naddy Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 Niklas Hallqvist. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef _MACHINE_ENDIAN_H_ 28 #define _MACHINE_ENDIAN_H_ 29 30 #ifndef __FROM_SYS__ENDIAN 31 #include <sys/_types.h> 32 #endif 33 34 static __inline __uint16_t 35 __swap16md(__uint16_t _x) 36 { 37 __asm ("rorw $8, %w0" : "+r" (_x)); 38 return (_x); 39 } 40 41 static __inline __uint32_t 42 __swap32md(__uint32_t _x) 43 { 44 __asm ("bswap %0" : "+r" (_x)); 45 return (_x); 46 } 47 48 static __inline __uint64_t 49 __swap64md(__uint64_t _x) 50 { 51 __asm ("bswapq %0" : "+r" (_x)); 52 return (_x); 53 } 54 55 /* Tell sys/endian.h we have MD variants of the swap macros. */ 56 #define __HAVE_MD_SWAP 57 58 #define _BYTE_ORDER _LITTLE_ENDIAN 59 60 #ifndef __FROM_SYS__ENDIAN 61 #include <sys/endian.h> 62 #endif 63 64 #endif /* _MACHINE_ENDIAN_H_ */ 65