Haojian Zhuang | b15f31a | 2017-06-01 21:55:53 +0800 | [diff] [blame] | 1 | /*- |
| 2 | * Copyright (c) 2001 David E. O'Brien |
| 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 | * 1. Redistributions of source code must retain the above copyright |
| 8 | * notice, this list of conditions and the following disclaimer. |
| 9 | * 2. Redistributions in binary form must reproduce the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer in the |
| 11 | * documentation and/or other materials provided with the distribution. |
| 12 | * 3. Neither the name of the University nor the names of its contributors |
| 13 | * may be used to endorse or promote products derived from this software |
| 14 | * without specific prior written permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | * |
| 28 | * @(#)endian.h 8.1 (Berkeley) 6/10/93 |
| 29 | * $NetBSD: endian.h,v 1.7 1999/08/21 05:53:51 simonb Exp $ |
| 30 | * $FreeBSD$ |
| 31 | */ |
Haojian Zhuang | e6a993d | 2017-06-02 08:51:17 +0800 | [diff] [blame^] | 32 | /* |
| 33 | * Portions copyright (c) 2017, ARM Limited and Contributors. |
| 34 | * All rights reserved. |
| 35 | */ |
Haojian Zhuang | b15f31a | 2017-06-01 21:55:53 +0800 | [diff] [blame] | 36 | |
| 37 | #ifndef _MACHINE_ENDIAN_H_ |
| 38 | #define _MACHINE_ENDIAN_H_ |
| 39 | |
| 40 | #include <sys/_types.h> |
| 41 | |
| 42 | /* |
| 43 | * Definitions for byte order, according to byte significance from low |
| 44 | * address to high. |
| 45 | */ |
| 46 | #define _LITTLE_ENDIAN 1234 /* LSB first: i386, vax */ |
| 47 | #define _BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */ |
| 48 | #define _PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */ |
| 49 | |
| 50 | #define _BYTE_ORDER _LITTLE_ENDIAN |
| 51 | |
| 52 | #if __BSD_VISIBLE |
| 53 | #define LITTLE_ENDIAN _LITTLE_ENDIAN |
| 54 | #define BIG_ENDIAN _BIG_ENDIAN |
| 55 | #define PDP_ENDIAN _PDP_ENDIAN |
| 56 | #define BYTE_ORDER _BYTE_ORDER |
| 57 | #endif |
| 58 | |
| 59 | #define _QUAD_HIGHWORD 1 |
| 60 | #define _QUAD_LOWWORD 0 |
| 61 | #define __ntohl(x) (__bswap32(x)) |
| 62 | #define __ntohs(x) (__bswap16(x)) |
| 63 | #define __htonl(x) (__bswap32(x)) |
| 64 | #define __htons(x) (__bswap16(x)) |
| 65 | |
Haojian Zhuang | e6a993d | 2017-06-02 08:51:17 +0800 | [diff] [blame^] | 66 | #ifdef AARCH32 |
| 67 | static __inline __uint64_t |
| 68 | __bswap64(__uint64_t _x) |
| 69 | { |
| 70 | |
| 71 | return ((_x >> 56) | ((_x >> 40) & 0xff00) | ((_x >> 24) & 0xff0000) | |
| 72 | ((_x >> 8) & 0xff000000) | ((_x << 8) & ((__uint64_t)0xff << 32)) | |
| 73 | ((_x << 24) & ((__uint64_t)0xff << 40)) | |
| 74 | ((_x << 40) & ((__uint64_t)0xff << 48)) | ((_x << 56))); |
| 75 | } |
| 76 | |
| 77 | static __inline __uint32_t |
| 78 | __bswap32_var(__uint32_t v) |
| 79 | { |
| 80 | __uint32_t t1; |
| 81 | |
| 82 | __asm __volatile("eor %1, %0, %0, ror #16\n" |
| 83 | "bic %1, %1, #0x00ff0000\n" |
| 84 | "mov %0, %0, ror #8\n" |
| 85 | "eor %0, %0, %1, lsr #8\n" |
| 86 | : "+r" (v), "=r" (t1)); |
| 87 | |
| 88 | return (v); |
| 89 | } |
| 90 | |
| 91 | static __inline __uint16_t |
| 92 | __bswap16_var(__uint16_t v) |
| 93 | { |
| 94 | __uint32_t ret = v & 0xffff; |
| 95 | |
| 96 | __asm __volatile( |
| 97 | "mov %0, %0, ror #8\n" |
| 98 | "orr %0, %0, %0, lsr #16\n" |
| 99 | "bic %0, %0, %0, lsl #16" |
| 100 | : "+r" (ret)); |
| 101 | |
| 102 | return ((__uint16_t)ret); |
| 103 | } |
| 104 | #elif defined AARCH64 |
Haojian Zhuang | b15f31a | 2017-06-01 21:55:53 +0800 | [diff] [blame] | 105 | static __inline __uint64_t |
| 106 | __bswap64(__uint64_t x) |
| 107 | { |
| 108 | __uint64_t ret; |
| 109 | |
| 110 | __asm __volatile("rev %0, %1\n" |
| 111 | : "=&r" (ret), "+r" (x)); |
| 112 | |
| 113 | return (ret); |
| 114 | } |
| 115 | |
| 116 | static __inline __uint32_t |
| 117 | __bswap32_var(__uint32_t v) |
| 118 | { |
| 119 | __uint32_t ret; |
| 120 | |
| 121 | __asm __volatile("rev32 %x0, %x1\n" |
| 122 | : "=&r" (ret), "+r" (v)); |
| 123 | |
| 124 | return (ret); |
| 125 | } |
| 126 | |
| 127 | static __inline __uint16_t |
| 128 | __bswap16_var(__uint16_t v) |
| 129 | { |
| 130 | __uint32_t ret; |
| 131 | |
| 132 | __asm __volatile("rev16 %w0, %w1\n" |
| 133 | : "=&r" (ret), "+r" (v)); |
| 134 | |
| 135 | return ((__uint16_t)ret); |
| 136 | } |
Haojian Zhuang | e6a993d | 2017-06-02 08:51:17 +0800 | [diff] [blame^] | 137 | #else |
| 138 | #error "Only AArch32 or AArch64 supported" |
| 139 | #endif /* AARCH32 */ |
Haojian Zhuang | b15f31a | 2017-06-01 21:55:53 +0800 | [diff] [blame] | 140 | |
| 141 | #ifdef __OPTIMIZE__ |
| 142 | |
| 143 | #define __bswap32_constant(x) \ |
| 144 | ((((x) & 0xff000000U) >> 24) | \ |
| 145 | (((x) & 0x00ff0000U) >> 8) | \ |
| 146 | (((x) & 0x0000ff00U) << 8) | \ |
| 147 | (((x) & 0x000000ffU) << 24)) |
| 148 | |
| 149 | #define __bswap16_constant(x) \ |
| 150 | ((((x) & 0xff00) >> 8) | \ |
| 151 | (((x) & 0x00ff) << 8)) |
| 152 | |
| 153 | #define __bswap16(x) \ |
| 154 | ((__uint16_t)(__builtin_constant_p(x) ? \ |
| 155 | __bswap16_constant(x) : \ |
| 156 | __bswap16_var(x))) |
| 157 | |
| 158 | #define __bswap32(x) \ |
| 159 | ((__uint32_t)(__builtin_constant_p(x) ? \ |
| 160 | __bswap32_constant(x) : \ |
| 161 | __bswap32_var(x))) |
| 162 | |
| 163 | #else |
| 164 | #define __bswap16(x) __bswap16_var(x) |
| 165 | #define __bswap32(x) __bswap32_var(x) |
| 166 | |
| 167 | #endif /* __OPTIMIZE__ */ |
| 168 | #endif /* !_MACHINE_ENDIAN_H_ */ |