1263382Smarcel/*- 2263382Smarcel * Copyright (c) 1987, 1991 Regents of the University of California. 3263382Smarcel * All rights reserved. 4263382Smarcel * 5263382Smarcel * Redistribution and use in source and binary forms, with or without 6263382Smarcel * modification, are permitted provided that the following conditions 7263382Smarcel * are met: 8263382Smarcel * 1. Redistributions of source code must retain the above copyright 9263382Smarcel * notice, this list of conditions and the following disclaimer. 10263382Smarcel * 2. Redistributions in binary form must reproduce the above copyright 11263382Smarcel * notice, this list of conditions and the following disclaimer in the 12263382Smarcel * documentation and/or other materials provided with the distribution. 13263382Smarcel * 4. Neither the name of the University nor the names of its contributors 14263382Smarcel * may be used to endorse or promote products derived from this software 15263382Smarcel * without specific prior written permission. 16263382Smarcel * 17263382Smarcel * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18263382Smarcel * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19263382Smarcel * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20263382Smarcel * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21263382Smarcel * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22263382Smarcel * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23263382Smarcel * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24263382Smarcel * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25263382Smarcel * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26263382Smarcel * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27263382Smarcel * SUCH DAMAGE. 28263382Smarcel * 29263382Smarcel * @(#)endian.h 7.8 (Berkeley) 4/3/91 30263382Smarcel * $FreeBSD$ 31263382Smarcel */ 32263442Smarcel 33263442Smarcel#ifndef _MACHINE_ENDIAN_H_ 34263382Smarcel#define _MACHINE_ENDIAN_H_ 35263382Smarcel 36263414Smarcel#include <sys/cdefs.h> 37263382Smarcel#ifndef __ASSEMBLER__ 38263382Smarcel#include <sys/_types.h> 39263382Smarcel#endif 40263382Smarcel 41263382Smarcel#ifdef __cplusplus 42263382Smarcelextern "C" { 43263382Smarcel#endif 44263461Smarcel 45263653Smarcel/* 46263653Smarcel * Definitions for byte order, according to byte significance from low 47263466Smarcel * address to high. 48263382Smarcel */ 49263382Smarcel#define _LITTLE_ENDIAN 1234 /* LSB first: i386, vax */ 50263382Smarcel#define _BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */ 51263382Smarcel#define _PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */ 52263382Smarcel 53268236Smarcel#ifdef __MIPSEB__ 54263831Smarcel#define _BYTE_ORDER _BIG_ENDIAN 55263831Smarcel#else 56263709Smarcel#define _BYTE_ORDER _LITTLE_ENDIAN 57263709Smarcel#endif /* __MIBSEB__ */ 58263709Smarcel 59263709Smarcel/* 60263709Smarcel * Deprecated variants that don't have enough underscores to be useful in more 61263653Smarcel * strict namespaces. 62263844Smarcel */ 63263844Smarcel#if __BSD_VISIBLE 64263844Smarcel#define LITTLE_ENDIAN _LITTLE_ENDIAN 65263844Smarcel#define BIG_ENDIAN _BIG_ENDIAN 66263844Smarcel#define PDP_ENDIAN _PDP_ENDIAN 67263844Smarcel#define BYTE_ORDER _BYTE_ORDER 68263844Smarcel#endif 69271881Smarcel 70271881Smarcel#ifndef __ASSEMBLER__ 71271881Smarcel#if defined(__GNUCLIKE_BUILTIN_CONSTANT_P) && defined(__OPTIMIZE__) 72271881Smarcel#define __is_constant(x) __builtin_constant_p(x) 73271881Smarcel#else 74271881Smarcel#define __is_constant(x) 0 75271881Smarcel#endif 76271881Smarcel 77271881Smarcel#define __bswap16_const(x) (((x) >> 8) | (((x) << 8) & 0xff00)) 78271881Smarcel#define __bswap32_const(x) (((x) >> 24) | (((x) >> 8) & 0xff00) | \ 79271881Smarcel (((x) << 8) & 0xff0000) | (((x) << 24) & 0xff000000)) 80271881Smarcel#define __bswap64_const(x) (((x) >> 56) | (((x) >> 40) & 0xff00) | \ 81271881Smarcel (((x) >> 24) & 0xff0000) | (((x) >> 8) & 0xff000000) | \ 82271881Smarcel (((x) << 8) & ((__uint64_t)0xff << 32)) | \ 83271881Smarcel (((x) << 24) & ((__uint64_t)0xff << 40)) | \ 84266176Smarcel (((x) << 40) & ((__uint64_t)0xff << 48)) | (((x) << 56))) 85266176Smarcel 86266176Smarcelstatic __inline __uint16_t 87266176Smarcel__bswap16_var(__uint16_t _x) 88266176Smarcel{ 89263653Smarcel 90272485Smarcel return ((_x >> 8) | ((_x << 8) & 0xff00)); 91272485Smarcel} 92268236Smarcel 93268236Smarcelstatic __inline __uint32_t 94268236Smarcel__bswap32_var(__uint32_t _x) 95263382Smarcel{ 96 97 return ((_x >> 24) | ((_x >> 8) & 0xff00) | ((_x << 8) & 0xff0000) | 98 ((_x << 24) & 0xff000000)); 99} 100 101static __inline __uint64_t 102__bswap64_var(__uint64_t _x) 103{ 104 105 return ((_x >> 56) | ((_x >> 40) & 0xff00) | ((_x >> 24) & 0xff0000) | 106 ((_x >> 8) & 0xff000000) | ((_x << 8) & ((__uint64_t)0xff << 32)) | 107 ((_x << 24) & ((__uint64_t)0xff << 40)) | 108 ((_x << 40) & ((__uint64_t)0xff << 48)) | ((_x << 56))); 109} 110 111#define __bswap16(x) ((__uint16_t)(__is_constant((x)) ? \ 112 __bswap16_const((__uint16_t)(x)) : __bswap16_var((__uint16_t)(x)))) 113#define __bswap32(x) ((__uint32_t)(__is_constant((x)) ? \ 114 __bswap32_const((__uint32_t)(x)) : __bswap32_var((__uint32_t)(x)))) 115#define __bswap64(x) ((__uint64_t)(__is_constant((x)) ? \ 116 __bswap64_const((__uint64_t)(x)) : __bswap64_var((__uint64_t)(x)))) 117 118#ifdef __MIPSEB__ 119#define __htonl(x) ((__uint32_t)(x)) 120#define __htons(x) ((__uint16_t)(x)) 121#define __ntohl(x) ((__uint32_t)(x)) 122#define __ntohs(x) ((__uint16_t)(x)) 123/* 124 * Define the order of 32-bit words in 64-bit words. 125 */ 126/* 127 * XXXMIPS: Additional parentheses to make gcc more happy. 128 */ 129#define _QUAD_HIGHWORD 0 130#define _QUAD_LOWWORD 1 131#else 132#define _QUAD_HIGHWORD 1 133#define _QUAD_LOWWORD 0 134#define __ntohl(x) (__bswap32((x))) 135#define __ntohs(x) (__bswap16((x))) 136#define __htonl(x) (__bswap32((x))) 137#define __htons(x) (__bswap16((x))) 138#endif /* _MIPSEB */ 139 140#endif /* _ASSEMBLER_ */ 141 142#ifdef __cplusplus 143} 144#endif 145 146#endif /* !_MACHINE_ENDIAN_H_ */ 147