BaseTools/Source/C/LzmaCompress/Sdk/C/CpuArch.h

   1 /* CpuArch.h
   2 2008-08-05
   3 Igor Pavlov
   4 Public domain */
   5
   6 #ifndef __CPUARCH_H
   7 #define __CPUARCH_H
   8
   9 /*
  10 LITTLE_ENDIAN_UNALIGN means:
  11   1) CPU is LITTLE_ENDIAN
  12   2) it's allowed to make unaligned memory accesses
  13 if LITTLE_ENDIAN_UNALIGN is not defined, it means that we don't know
  14 about these properties of platform.
  15 */
  16
  17 #if defined(_M_IX86) || defined(_M_X64) || defined(_M_AMD64) || defined(__i386__) || defined(__x86_64__)
  18 #define LITTLE_ENDIAN_UNALIGN
  19 #endif
  20
  21 #ifdef LITTLE_ENDIAN_UNALIGN
  22
  23 #define GetUi16(p) (*(const UInt16 *)(p))
  24 #define GetUi32(p) (*(const UInt32 *)(p))
  25 #define GetUi64(p) (*(const UInt64 *)(p))
  26 #define SetUi32(p, d) *(UInt32 *)(p) = (d);
  27
  28 #else
  29
  30 #define GetUi16(p) (((const Byte *)(p))[0] | ((UInt16)((const Byte *)(p))[1] << 8))
  31
  32 #define GetUi32(p) ( \
  33              ((const Byte *)(p))[0]        | \
  34     ((UInt32)((const Byte *)(p))[1] <<  8) | \
  35     ((UInt32)((const Byte *)(p))[2] << 16) | \
  36     ((UInt32)((const Byte *)(p))[3] << 24))
  37
  38 #define GetUi64(p) (GetUi32(p) | ((UInt64)GetUi32(((const Byte *)(p)) + 4) << 32))
  39
  40 #define SetUi32(p, d) { UInt32 _x_ = (d); \
  41     ((Byte *)(p))[0] = (Byte)_x_; \
  42     ((Byte *)(p))[1] = (Byte)(_x_ >> 8); \
  43     ((Byte *)(p))[2] = (Byte)(_x_ >> 16); \
  44     ((Byte *)(p))[3] = (Byte)(_x_ >> 24); }
  45
  46 #endif
  47
  48 #if defined(LITTLE_ENDIAN_UNALIGN) && defined(_WIN64) && (_MSC_VER >= 1300)
  49
  50 #pragma intrinsic(_byteswap_ulong)
  51 #pragma intrinsic(_byteswap_uint64)
  52 #define GetBe32(p) _byteswap_ulong(*(const UInt32 *)(const Byte *)(p))
  53 #define GetBe64(p) _byteswap_uint64(*(const UInt64 *)(const Byte *)(p))
  54
  55 #else
  56
  57 #define GetBe32(p) ( \
  58     ((UInt32)((const Byte *)(p))[0] << 24) | \
  59     ((UInt32)((const Byte *)(p))[1] << 16) | \
  60     ((UInt32)((const Byte *)(p))[2] <<  8) | \
  61              ((const Byte *)(p))[3] )
  62
  63 #define GetBe64(p) (((UInt64)GetBe32(p) << 32) | GetBe32(((const Byte *)(p)) + 4))
  64
  65 #endif
  66
  67 #define GetBe16(p) (((UInt16)((const Byte *)(p))[0] << 8) | ((const Byte *)(p))[1])
  68
  69 #endif