/usr/share/dpdk/x86_64-default-linuxapp-gcc/include/generic/rte_byteorder.h is in dpdk-dev 17.11.1-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 | /*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _RTE_BYTEORDER_H_
#define _RTE_BYTEORDER_H_
/**
* @file
*
* Byte Swap Operations
*
* This file defines a generic API for byte swap operations. Part of
* the implementation is architecture-specific.
*/
#include <stdint.h>
#ifdef RTE_EXEC_ENV_BSDAPP
#include <sys/endian.h>
#else
#include <endian.h>
#endif
#include <rte_common.h>
#include <rte_config.h>
/*
* Compile-time endianness detection
*/
#define RTE_BIG_ENDIAN 1
#define RTE_LITTLE_ENDIAN 2
#if defined __BYTE_ORDER__
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
#define RTE_BYTE_ORDER RTE_BIG_ENDIAN
#elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
#define RTE_BYTE_ORDER RTE_LITTLE_ENDIAN
#endif /* __BYTE_ORDER__ */
#elif defined __BYTE_ORDER
#if __BYTE_ORDER == __BIG_ENDIAN
#define RTE_BYTE_ORDER RTE_BIG_ENDIAN
#elif __BYTE_ORDER == __LITTLE_ENDIAN
#define RTE_BYTE_ORDER RTE_LITTLE_ENDIAN
#endif /* __BYTE_ORDER */
#elif defined __BIG_ENDIAN__
#define RTE_BYTE_ORDER RTE_BIG_ENDIAN
#elif defined __LITTLE_ENDIAN__
#define RTE_BYTE_ORDER RTE_LITTLE_ENDIAN
#endif
#if !defined(RTE_BYTE_ORDER)
#error Unknown endianness.
#endif
#define RTE_STATIC_BSWAP16(v) \
((((uint16_t)(v) & UINT16_C(0x00ff)) << 8) | \
(((uint16_t)(v) & UINT16_C(0xff00)) >> 8))
#define RTE_STATIC_BSWAP32(v) \
((((uint32_t)(v) & UINT32_C(0x000000ff)) << 24) | \
(((uint32_t)(v) & UINT32_C(0x0000ff00)) << 8) | \
(((uint32_t)(v) & UINT32_C(0x00ff0000)) >> 8) | \
(((uint32_t)(v) & UINT32_C(0xff000000)) >> 24))
#define RTE_STATIC_BSWAP64(v) \
((((uint64_t)(v) & UINT64_C(0x00000000000000ff)) << 56) | \
(((uint64_t)(v) & UINT64_C(0x000000000000ff00)) << 40) | \
(((uint64_t)(v) & UINT64_C(0x0000000000ff0000)) << 24) | \
(((uint64_t)(v) & UINT64_C(0x00000000ff000000)) << 8) | \
(((uint64_t)(v) & UINT64_C(0x000000ff00000000)) >> 8) | \
(((uint64_t)(v) & UINT64_C(0x0000ff0000000000)) >> 24) | \
(((uint64_t)(v) & UINT64_C(0x00ff000000000000)) >> 40) | \
(((uint64_t)(v) & UINT64_C(0xff00000000000000)) >> 56))
/*
* These macros are functionally similar to rte_cpu_to_(be|le)(16|32|64)(),
* they take values in host CPU order and return them converted to the
* intended endianness.
*
* They resolve at compilation time to integer constants which can safely be
* used with static initializers, since those cannot involve function calls.
*
* On the other hand, they are not as optimized as their rte_cpu_to_*()
* counterparts, therefore applications should refrain from using them on
* variable values, particularly inside performance-sensitive code.
*/
#if RTE_BYTE_ORDER == RTE_BIG_ENDIAN
#define RTE_BE16(v) (rte_be16_t)(v)
#define RTE_BE32(v) (rte_be32_t)(v)
#define RTE_BE64(v) (rte_be64_t)(v)
#define RTE_LE16(v) (rte_le16_t)(RTE_STATIC_BSWAP16(v))
#define RTE_LE32(v) (rte_le32_t)(RTE_STATIC_BSWAP32(v))
#define RTE_LE64(v) (rte_le64_t)(RTE_STATIC_BSWAP64(v))
#elif RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
#define RTE_BE16(v) (rte_be16_t)(RTE_STATIC_BSWAP16(v))
#define RTE_BE32(v) (rte_be32_t)(RTE_STATIC_BSWAP32(v))
#define RTE_BE64(v) (rte_be64_t)(RTE_STATIC_BSWAP64(v))
#define RTE_LE16(v) (rte_be16_t)(v)
#define RTE_LE32(v) (rte_be32_t)(v)
#define RTE_LE64(v) (rte_be64_t)(v)
#else
#error Unsupported endianness.
#endif
/*
* The following types should be used when handling values according to a
* specific byte ordering, which may differ from that of the host CPU.
*
* Libraries, public APIs and applications are encouraged to use them for
* documentation purposes.
*/
typedef uint16_t rte_be16_t; /**< 16-bit big-endian value. */
typedef uint32_t rte_be32_t; /**< 32-bit big-endian value. */
typedef uint64_t rte_be64_t; /**< 64-bit big-endian value. */
typedef uint16_t rte_le16_t; /**< 16-bit little-endian value. */
typedef uint32_t rte_le32_t; /**< 32-bit little-endian value. */
typedef uint64_t rte_le64_t; /**< 64-bit little-endian value. */
/*
* An internal function to swap bytes in a 16-bit value.
*
* It is used by rte_bswap16() when the value is constant. Do not use
* this function directly; rte_bswap16() is preferred.
*/
static inline uint16_t
rte_constant_bswap16(uint16_t x)
{
return RTE_STATIC_BSWAP16(x);
}
/*
* An internal function to swap bytes in a 32-bit value.
*
* It is used by rte_bswap32() when the value is constant. Do not use
* this function directly; rte_bswap32() is preferred.
*/
static inline uint32_t
rte_constant_bswap32(uint32_t x)
{
return RTE_STATIC_BSWAP32(x);
}
/*
* An internal function to swap bytes of a 64-bit value.
*
* It is used by rte_bswap64() when the value is constant. Do not use
* this function directly; rte_bswap64() is preferred.
*/
static inline uint64_t
rte_constant_bswap64(uint64_t x)
{
return RTE_STATIC_BSWAP64(x);
}
#ifdef __DOXYGEN__
/**
* Swap bytes in a 16-bit value.
*/
static uint16_t rte_bswap16(uint16_t _x);
/**
* Swap bytes in a 32-bit value.
*/
static uint32_t rte_bswap32(uint32_t x);
/**
* Swap bytes in a 64-bit value.
*/
static uint64_t rte_bswap64(uint64_t x);
/**
* Convert a 16-bit value from CPU order to little endian.
*/
static rte_le16_t rte_cpu_to_le_16(uint16_t x);
/**
* Convert a 32-bit value from CPU order to little endian.
*/
static rte_le32_t rte_cpu_to_le_32(uint32_t x);
/**
* Convert a 64-bit value from CPU order to little endian.
*/
static rte_le64_t rte_cpu_to_le_64(uint64_t x);
/**
* Convert a 16-bit value from CPU order to big endian.
*/
static rte_be16_t rte_cpu_to_be_16(uint16_t x);
/**
* Convert a 32-bit value from CPU order to big endian.
*/
static rte_be32_t rte_cpu_to_be_32(uint32_t x);
/**
* Convert a 64-bit value from CPU order to big endian.
*/
static rte_be64_t rte_cpu_to_be_64(uint64_t x);
/**
* Convert a 16-bit value from little endian to CPU order.
*/
static uint16_t rte_le_to_cpu_16(rte_le16_t x);
/**
* Convert a 32-bit value from little endian to CPU order.
*/
static uint32_t rte_le_to_cpu_32(rte_le32_t x);
/**
* Convert a 64-bit value from little endian to CPU order.
*/
static uint64_t rte_le_to_cpu_64(rte_le64_t x);
/**
* Convert a 16-bit value from big endian to CPU order.
*/
static uint16_t rte_be_to_cpu_16(rte_be16_t x);
/**
* Convert a 32-bit value from big endian to CPU order.
*/
static uint32_t rte_be_to_cpu_32(rte_be32_t x);
/**
* Convert a 64-bit value from big endian to CPU order.
*/
static uint64_t rte_be_to_cpu_64(rte_be64_t x);
#endif /* __DOXYGEN__ */
#ifdef RTE_FORCE_INTRINSICS
#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)
#define rte_bswap16(x) __builtin_bswap16(x)
#endif
#define rte_bswap32(x) __builtin_bswap32(x)
#define rte_bswap64(x) __builtin_bswap64(x)
#endif
#endif /* _RTE_BYTEORDER_H_ */
|