tools/elftosb/common/EndianUtilities.h

   1 /*
   2  * File:        EndianUtilities.h
   3  *
   4  * Copyright (c) Freescale Semiconductor, Inc. All rights reserved.
   5  * See included license file for license details.
   6  */
   7 #if !defined(_EndianUtilities_h_)
   8 #define _EndianUtilities_h_
   9
  10 //! \name Swap macros
  11 //! These macros always swap the data.
  12 //@{
  13
  14 //! Byte swap 16-bit value.
  15 #define _BYTESWAP16(value)                 \
  16         (((((uint16_t)value)<<8) & 0xFF00)   | \
  17          ((((uint16_t)value)>>8) & 0x00FF))
  18
  19 //! Byte swap 32-bit value.
  20 #define _BYTESWAP32(value)                     \
  21         (((((uint32_t)value)<<24) & 0xFF000000)  | \
  22          ((((uint32_t)value)<< 8) & 0x00FF0000)  | \
  23          ((((uint32_t)value)>> 8) & 0x0000FF00)  | \
  24          ((((uint32_t)value)>>24) & 0x000000FF))
  25
  26 //! Byte swap 64-bit value.
  27 #define _BYTESWAP64(value)                                \
  28                 (((((uint64_t)value)<<56) & 0xFF00000000000000ULL)  | \
  29                  ((((uint64_t)value)<<40) & 0x00FF000000000000ULL)  | \
  30                  ((((uint64_t)value)<<24) & 0x0000FF0000000000ULL)  | \
  31                  ((((uint64_t)value)<< 8) & 0x000000FF00000000ULL)  | \
  32                  ((((uint64_t)value)>> 8) & 0x00000000FF000000ULL)  | \
  33                  ((((uint64_t)value)>>24) & 0x0000000000FF0000ULL)  | \
  34                  ((((uint64_t)value)>>40) & 0x000000000000FF00ULL)  | \
  35                  ((((uint64_t)value)>>56) & 0x00000000000000FFULL))
  36
  37 //@}
  38
  39 //! \name Inline swap functions
  40 //@{
  41
  42 inline uint16_t _swap_u16(uint16_t value) { return _BYTESWAP16(value); }
  43 inline int16_t _swap_s16(int16_t value) { return (int16_t)_BYTESWAP16((uint16_t)value); }
  44
  45 inline uint32_t _swap_u32(uint32_t value) { return _BYTESWAP32(value); }
  46 inline int32_t _swap_s32(int32_t value) { return (int32_t)_BYTESWAP32((uint32_t)value); }
  47
  48 inline uint64_t _swap_u64(uint64_t value) { return _BYTESWAP64(value); }
  49 inline int64_t _swap_s64(int64_t value) { return (uint64_t)_BYTESWAP64((uint64_t)value); }
  50
  51 //@}
  52
  53 #if defined(__LITTLE_ENDIAN__)
  54
  55         /* little endian host */
  56
  57         #define ENDIAN_BIG_TO_HOST_U16(value) (_swap_u16(value))
  58         #define ENDIAN_HOST_TO_BIG_U16(value) (_swap_u16(value))
  59
  60         #define ENDIAN_BIG_TO_HOST_S16(value) (_swap_s16(value))
  61         #define ENDIAN_HOST_TO_BIG_S16(value) (_swap_s16(value))
  62
  63         #define ENDIAN_BIG_TO_HOST_U32(value) (_swap_u32(value))
  64         #define ENDIAN_HOST_TO_BIG_U32(value) (_swap_u32(value))
  65
  66         #define ENDIAN_BIG_TO_HOST_S32(value) (_swap_s32(value))
  67         #define ENDIAN_HOST_TO_BIG_S32(value) (_swap_s32(value))
  68
  69         #define ENDIAN_BIG_TO_HOST_U64(value) (_swap_u64(value))
  70         #define ENDIAN_HOST_TO_BIG_U64(value) (_swap_u64(value))
  71
  72         #define ENDIAN_BIG_TO_HOST_S64(value) (_swap_s64(value))
  73         #define ENDIAN_HOST_TO_BIG_S64(value) (_swap_s64(value))
  74
  75         /* no-ops */
  76
  77         #define ENDIAN_LITTLE_TO_HOST_U16(value) (value)
  78         #define ENDIAN_HOST_TO_LITTLE_U16(value) (value)
  79
  80         #define ENDIAN_LITTLE_TO_HOST_S16(value) (value)
  81         #define ENDIAN_HOST_TO_LITTLE_S16(value) (value)
  82
  83         #define ENDIAN_LITTLE_TO_HOST_U32(value) (value)
  84         #define ENDIAN_HOST_TO_LITTLE_U32(value) (value)
  85
  86         #define ENDIAN_LITTLE_TO_HOST_S32(value) (value)
  87         #define ENDIAN_HOST_TO_LITTLE_S32(value) (value)
  88
  89         #define ENDIAN_LITTLE_TO_HOST_U64(value) (value)
  90         #define ENDIAN_HOST_TO_LITTLE_U64(value) (value)
  91
  92         #define ENDIAN_LITTLE_TO_HOST_S64(value) (value)
  93         #define ENDIAN_HOST_TO_LITTLE_S64(value) (value)
  94
  95 #elif defined(__BIG_ENDIAN__)
  96
  97         /* big endian host */
  98
  99         #define ENDIAN_LITTLE_TO_HOST_U16(value) (_swap_u16(value))
 100         #define ENDIAN_HOST_TO_LITTLE_U16(value) (_swap_u16(value))
 101
 102         #define ENDIAN_LITTLE_TO_HOST_S16(value) (_swap_s16(value))
 103         #define ENDIAN_HOST_TO_LITTLE_S16(value) (_swap_s16(value))
 104
 105         #define ENDIAN_LITTLE_TO_HOST_U32(value) (_swap_u32(value))
 106         #define ENDIAN_HOST_TO_LITTLE_U32(value) (_swap_u32(value))
 107
 108         #define ENDIAN_LITTLE_TO_HOST_S32(value) (_swap_s32(value))
 109         #define ENDIAN_HOST_TO_LITTLE_S32(value) (_swap_s32(value))
 110
 111         #define ENDIAN_LITTLE_TO_HOST_U64(value) (_swap_u64(value))
 112         #define ENDIAN_HOST_TO_LITTLE_U64(value) (_swap_u64(value))
 113
 114         #define ENDIAN_LITTLE_TO_HOST_S64(value) (_swap_s64(value))
 115         #define ENDIAN_HOST_TO_LITTLE_S64(value) (_swap_s64(value))
 116
 117         /* no-ops */
 118
 119         #define ENDIAN_BIG_TO_HOST_U16(value) (value)
 120         #define ENDIAN_HOST_TO_BIG_U16(value) (value)
 121
 122         #define ENDIAN_BIG_TO_HOST_S16(value) (value)
 123         #define ENDIAN_HOST_TO_BIG_S16(value) (value)
 124
 125         #define ENDIAN_BIG_TO_HOST_U32(value) (value)
 126         #define ENDIAN_HOST_TO_BIG_U32(value) (value)
 127
 128         #define ENDIAN_BIG_TO_HOST_S32(value) (value)
 129         #define ENDIAN_HOST_TO_BIG_S32(value) (value)
 130
 131         #define ENDIAN_BIG_TO_HOST_U64(value) (value)
 132         #define ENDIAN_HOST_TO_BIG_U64(value) (value)
 133
 134         #define ENDIAN_BIG_TO_HOST_S64(value) (value)
 135         #define ENDIAN_HOST_TO_BIG_S64(value) (value)
 136
 137 #endif
 138
 139
 140
 141 #endif // _EndianUtilities_h_