1139735Simp/*- 270651Sobrien * Copyright (c) 2001 David E. O'Brien 370651Sobrien * 470651Sobrien * Redistribution and use in source and binary forms, with or without 570651Sobrien * modification, are permitted provided that the following conditions 670651Sobrien * are met: 770651Sobrien * 1. Redistributions of source code must retain the above copyright 870651Sobrien * notice, this list of conditions and the following disclaimer. 970651Sobrien * 2. Redistributions in binary form must reproduce the above copyright 1070651Sobrien * notice, this list of conditions and the following disclaimer in the 1170651Sobrien * documentation and/or other materials provided with the distribution. 1270651Sobrien * 3. Neither the name of the University nor the names of its contributors 1370651Sobrien * may be used to endorse or promote products derived from this software 1470651Sobrien * without specific prior written permission. 1570651Sobrien * 1670651Sobrien * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 1770651Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1870651Sobrien * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1970651Sobrien * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2070651Sobrien * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2170651Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2270651Sobrien * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2370651Sobrien * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2470651Sobrien * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2570651Sobrien * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2670651Sobrien * SUCH DAMAGE. 2770651Sobrien * 2870651Sobrien * @(#)endian.h 8.1 (Berkeley) 6/10/93 2970651Sobrien * $NetBSD: endian.h,v 1.7 1999/08/21 05:53:51 simonb Exp $ 3070651Sobrien * $FreeBSD$ 3170651Sobrien */ 3270651Sobrien 3370651Sobrien#ifndef _ENDIAN_H_ 3470651Sobrien#define _ENDIAN_H_ 3570651Sobrien 36128938Scognet#include <sys/_types.h> 3770651Sobrien 38128938Scognet/* 39128938Scognet * Definitions for byte order, according to byte significance from low 40128938Scognet * address to high. 41128938Scognet */ 42128938Scognet#define _LITTLE_ENDIAN 1234 /* LSB first: i386, vax */ 43128938Scognet#define _BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */ 44128938Scognet#define _PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */ 45128938Scognet 46140425Scognet#ifdef __ARMEB__ 47140425Scognet#define _BYTE_ORDER _BIG_ENDIAN 48140425Scognet#else 49128938Scognet#define _BYTE_ORDER _LITTLE_ENDIAN 50140425Scognet#endif /* __ARMEB__ */ 51128938Scognet 52128938Scognet#if __BSD_VISIBLE 53128938Scognet#define LITTLE_ENDIAN _LITTLE_ENDIAN 54128938Scognet#define BIG_ENDIAN _BIG_ENDIAN 55128938Scognet#define PDP_ENDIAN _PDP_ENDIAN 56128938Scognet#define BYTE_ORDER _BYTE_ORDER 57128938Scognet#endif 58128938Scognet 59140425Scognet#ifdef __ARMEB__ 60140425Scognet#define _QUAD_HIGHWORD 0 61140425Scognet#define _QUAD_LOWWORD 1 62140425Scognet#define __ntohl(x) ((__uint32_t)(x)) 63140425Scognet#define __ntohs(x) ((__uint16_t)(x)) 64140425Scognet#define __htonl(x) ((__uint32_t)(x)) 65140425Scognet#define __htons(x) ((__uint16_t)(x)) 66140425Scognet#else 67128938Scognet#define _QUAD_HIGHWORD 1 68128938Scognet#define _QUAD_LOWWORD 0 69128938Scognet#define __ntohl(x) (__bswap32(x)) 70128938Scognet#define __ntohs(x) (__bswap16(x)) 71133012Scognet#define __htonl(x) (__bswap32(x)) 72133012Scognet#define __htons(x) (__bswap16(x)) 73140425Scognet#endif /* __ARMEB__ */ 74128938Scognet 75128938Scognetstatic __inline __uint64_t 76128938Scognet__bswap64(__uint64_t _x) 77128938Scognet{ 78128938Scognet 79128938Scognet return ((_x >> 56) | ((_x >> 40) & 0xff00) | ((_x >> 24) & 0xff0000) | 80128938Scognet ((_x >> 8) & 0xff000000) | ((_x << 8) & ((__uint64_t)0xff << 32)) | 81236992Simp ((_x << 24) & ((__uint64_t)0xff << 40)) | 82128938Scognet ((_x << 40) & ((__uint64_t)0xff << 48)) | ((_x << 56))); 83128938Scognet} 84128938Scognet 85128938Scognetstatic __inline __uint32_t 86136033Scognet__bswap32_var(__uint32_t v) 87128938Scognet{ 88128938Scognet __uint32_t t1; 89128938Scognet 90146592Scognet __asm __volatile("eor %1, %0, %0, ror #16\n" 91146592Scognet "bic %1, %1, #0x00ff0000\n" 92146592Scognet "mov %0, %0, ror #8\n" 93146592Scognet "eor %0, %0, %1, lsr #8\n" 94146592Scognet : "+r" (v), "=r" (t1)); 95128938Scognet 96128938Scognet return (v); 97182086Simp} 98128938Scognet 99128938Scognetstatic __inline __uint16_t 100146592Scognet__bswap16_var(__uint16_t v) 101128938Scognet{ 102172104Scognet __uint32_t ret = v & 0xffff; 103172104Scognet 104128938Scognet __asm __volatile( 105148452Sjhb "mov %0, %0, ror #8\n" 106128938Scognet "orr %0, %0, %0, lsr #16\n" 107128938Scognet "bic %0, %0, %0, lsl #16" 108172104Scognet : "+r" (ret)); 109128938Scognet 110172104Scognet return ((__uint16_t)ret); 111128938Scognet} 112136033Scognet 113136033Scognet#ifdef __OPTIMIZE__ 114136033Scognet 115136033Scognet#define __bswap32_constant(x) \ 116136033Scognet ((((x) & 0xff000000U) >> 24) | \ 117136033Scognet (((x) & 0x00ff0000U) >> 8) | \ 118136033Scognet (((x) & 0x0000ff00U) << 8) | \ 119136033Scognet (((x) & 0x000000ffU) << 24)) 120136033Scognet 121136033Scognet#define __bswap16_constant(x) \ 122136033Scognet ((((x) & 0xff00) >> 8) | \ 123136033Scognet (((x) & 0x00ff) << 8)) 124136033Scognet 125136033Scognet#define __bswap16(x) \ 126137216Scognet ((__uint16_t)(__builtin_constant_p(x) ? \ 127137216Scognet __bswap16_constant(x) : \ 128137216Scognet __bswap16_var(x))) 129136033Scognet 130136033Scognet#define __bswap32(x) \ 131137216Scognet ((__uint32_t)(__builtin_constant_p(x) ? \ 132137216Scognet __bswap32_constant(x) : \ 133137216Scognet __bswap32_var(x))) 134136033Scognet 135136033Scognet#else 136136033Scognet#define __bswap16(x) __bswap16_var(x) 137136033Scognet#define __bswap32(x) __bswap32_var(x) 138136033Scognet 139136033Scognet#endif /* __OPTIMIZE__ */ 14070651Sobrien#endif /* !_ENDIAN_H_ */ 141