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  1. /*
  2.  * Copyright (C) 2005 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #ifndef __mips_BYTEORDER_H__
  30. #define __mips_BYTEORDER_H__
  31.  
  32. #ifdef BIG_ENDIAN
  33. static inline __u64 u64_le2host(__u64 n)
  34. {
  35.     return ((n & 0xff) << 56) |
  36.         ((n & 0xff00) << 40) |
  37.         ((n & 0xff0000) << 24) |
  38.         ((n & 0xff000000LL) << 8) |
  39.         ((n & 0xff00000000LL) >>8) |
  40.         ((n & 0xff0000000000LL) >> 24) |
  41.         ((n & 0xff000000000000LL) >> 40) |
  42.         ((n & 0xff00000000000000LL) >> 56);
  43. }
  44.  
  45. static inline __native native_le2host(__native n)
  46. {
  47.     return ((n & 0xff) << 24) |
  48.         ((n & 0xff00) << 8) |
  49.         ((n & 0xff0000) >> 8) |
  50.         ((n & 0xff000000) >> 24);
  51. }
  52. #else
  53. #  define native_le2host(n)     (n)
  54. #  define u64_le2host(n)        (n)
  55. #endif
  56.  
  57. #endif
  58.