lib/lzo/lzodefs.h

   1 /*
   2  *  lzodefs.h -- architecture, OS and compiler specific defines
   3  *
   4  *  Copyright (C) 1996-2012 Markus F.X.J. Oberhumer <markus@oberhumer.com>
   5  *
   6  *  The full LZO package can be found at:
   7  *  http://www.oberhumer.com/opensource/lzo/
   8  *
   9  *  Changed for Linux kernel use by:
  10  *  Nitin Gupta <nitingupta910@gmail.com>
  11  *  Richard Purdie <rpurdie@openedhand.com>
  12  */
  13
  14
  15 #define COPY4(dst, src) \
  16                 put_unaligned(get_unaligned((const u32 *)(src)), (u32 *)(dst))
  17 #if defined(__x86_64__)
  18 #define COPY8(dst, src) \
  19                 put_unaligned(get_unaligned((const u64 *)(src)), (u64 *)(dst))
  20 #else
  21 #define COPY8(dst, src) \
  22                 COPY4(dst, src); COPY4((dst) + 4, (src) + 4)
  23 #endif
  24
  25 #if defined(__BIG_ENDIAN) && defined(__LITTLE_ENDIAN)
  26 #error "conflicting endian definitions"
  27 #elif defined(__x86_64__)
  28 #define LZO_USE_CTZ64   1
  29 #define LZO_USE_CTZ32   1
  30 #elif defined(__i386__) || defined(__powerpc__)
  31 #define LZO_USE_CTZ32   1
  32 #elif defined(__arm__) && (__LINUX_ARM_ARCH__ >= 5)
  33 #define LZO_USE_CTZ32   1
  34 #endif
  35
  36 #define M1_MAX_OFFSET   0x0400
  37 #define M2_MAX_OFFSET   0x0800
  38 #define M3_MAX_OFFSET   0x4000
  39 #define M4_MAX_OFFSET   0xbfff
  40
  41 #define M1_MIN_LEN      2
  42 #define M1_MAX_LEN      2
  43 #define M2_MIN_LEN      3
  44 #define M2_MAX_LEN      8
  45 #define M3_MIN_LEN      3
  46 #define M3_MAX_LEN      33
  47 #define M4_MIN_LEN      3
  48 #define M4_MAX_LEN      9
  49
  50 #define M1_MARKER       0
  51 #define M2_MARKER       64
  52 #define M3_MARKER       32
  53 #define M4_MARKER       16
  54
  55 #define lzo_dict_t      unsigned short
  56 #define D_BITS          13
  57 #define D_SIZE          (1u << D_BITS)
  58 #define D_MASK          (D_SIZE - 1)
  59 #define D_HIGH          ((D_MASK >> 1) + 1)