Mercurial > vba-linux

     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
author	Robert McIntyre <rlm@mit.edu>
date	Sat, 03 Mar 2012 10:31:27 -0600
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