The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/mips/include/endian.h

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1987, 1991 Regents of the University of California.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)endian.h    7.8 (Berkeley) 4/3/91
   32  * $FreeBSD$
   33  */
   34 
   35 #ifndef _MACHINE_ENDIAN_H_
   36 #define _MACHINE_ENDIAN_H_
   37 
   38 #include <sys/cdefs.h>
   39 #ifndef __ASSEMBLER__
   40 #include <sys/_types.h>
   41 #endif
   42 
   43 #ifdef __cplusplus
   44 extern "C" {
   45 #endif
   46 
   47 /*
   48  * Definitions for byte order, according to byte significance from low
   49  * address to high.
   50  */
   51 #define _LITTLE_ENDIAN  1234    /* LSB first: i386, vax */
   52 #define _BIG_ENDIAN     4321    /* MSB first: 68000, ibm, net */
   53 #define _PDP_ENDIAN     3412    /* LSB first in word, MSW first in long */
   54 
   55 #ifdef __MIPSEB__
   56 #define _BYTE_ORDER     _BIG_ENDIAN
   57 #else
   58 #define _BYTE_ORDER     _LITTLE_ENDIAN
   59 #endif /* __MIBSEB__ */
   60 
   61 /*
   62  * Deprecated variants that don't have enough underscores to be useful in more
   63  * strict namespaces.
   64  */
   65 #if __BSD_VISIBLE
   66 #define LITTLE_ENDIAN   _LITTLE_ENDIAN
   67 #define BIG_ENDIAN      _BIG_ENDIAN
   68 #define PDP_ENDIAN      _PDP_ENDIAN
   69 #define BYTE_ORDER      _BYTE_ORDER
   70 #endif
   71 
   72 #ifndef __ASSEMBLER__
   73 #if defined(__GNUCLIKE_BUILTIN_CONSTANT_P) && defined(__OPTIMIZE__)
   74 #define __is_constant(x)        __builtin_constant_p(x)
   75 #else
   76 #define __is_constant(x)        0
   77 #endif
   78 
   79 #define __bswap16_const(x)      (((x) >> 8) | (((x) << 8) & 0xff00))
   80 #define __bswap32_const(x)      (((x) >> 24) | (((x) >> 8) & 0xff00) |  \
   81         (((x) << 8) & 0xff0000) | (((x) << 24) & 0xff000000))
   82 #define __bswap64_const(x)      (((x) >> 56) | (((x) >> 40) & 0xff00) | \
   83         (((x) >> 24) & 0xff0000) | (((x) >> 8) & 0xff000000) |          \
   84         (((x) << 8) & ((__uint64_t)0xff << 32)) |                       \
   85         (((x) << 24) & ((__uint64_t)0xff << 40)) |                      \
   86         (((x) << 40) & ((__uint64_t)0xff << 48)) | (((x) << 56)))
   87 
   88 static __inline __uint16_t
   89 __bswap16_var(__uint16_t _x)
   90 {
   91 
   92         return ((_x >> 8) | ((_x << 8) & 0xff00));
   93 }
   94 
   95 static __inline __uint32_t
   96 __bswap32_var(__uint32_t _x)
   97 {
   98 
   99         return ((_x >> 24) | ((_x >> 8) & 0xff00) | ((_x << 8) & 0xff0000) |
  100             ((_x << 24) & 0xff000000));
  101 }
  102 
  103 static __inline __uint64_t
  104 __bswap64_var(__uint64_t _x)
  105 {
  106 
  107         return ((_x >> 56) | ((_x >> 40) & 0xff00) | ((_x >> 24) & 0xff0000) |
  108             ((_x >> 8) & 0xff000000) | ((_x << 8) & ((__uint64_t)0xff << 32)) |
  109             ((_x << 24) & ((__uint64_t)0xff << 40)) |
  110             ((_x << 40) & ((__uint64_t)0xff << 48)) | ((_x << 56)));
  111 }
  112 
  113 #define __bswap16(x)    ((__uint16_t)(__is_constant((x)) ?              \
  114         __bswap16_const((__uint16_t)(x)) :  __bswap16_var((__uint16_t)(x))))
  115 #define __bswap32(x)    ((__uint32_t)(__is_constant((x)) ?              \
  116         __bswap32_const((__uint32_t)(x)) :  __bswap32_var((__uint32_t)(x))))
  117 #define __bswap64(x)    ((__uint64_t)(__is_constant((x)) ?              \
  118         __bswap64_const((__uint64_t)(x)) :  __bswap64_var((__uint64_t)(x))))
  119 
  120 #ifdef __MIPSEB__
  121 #define __htonl(x)      ((__uint32_t)(x))
  122 #define __htons(x)      ((__uint16_t)(x))
  123 #define __ntohl(x)      ((__uint32_t)(x))
  124 #define __ntohs(x)      ((__uint16_t)(x))       
  125 /*
  126  * Define the order of 32-bit words in 64-bit words.
  127  */
  128 /*
  129  * XXXMIPS: Additional parentheses to make gcc more happy.
  130  */
  131 #define _QUAD_HIGHWORD 0
  132 #define _QUAD_LOWWORD 1
  133 #else
  134 #define _QUAD_HIGHWORD  1
  135 #define _QUAD_LOWWORD 0
  136 #define __ntohl(x)      (__bswap32((x)))
  137 #define __ntohs(x)      (__bswap16((x)))
  138 #define __htonl(x)      (__bswap32((x)))
  139 #define __htons(x)      (__bswap16((x)))
  140 #endif /* _MIPSEB */
  141 
  142 #endif /* _ASSEMBLER_ */
  143 
  144 #ifdef __cplusplus
  145 }
  146 #endif
  147 
  148 #endif /* !_MACHINE_ENDIAN_H_ */

Cache object: 2573089ed4b0e0466f117f573788d4da


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.