1 /* CpuArch.h 2 2009-03-22 : Igor Pavlov : Public domain */ 3 4 #ifndef __CPU_ARCH_H 5 #define __CPU_ARCH_H 6 7 #ifdef __cplusplus 8 extern "C" { 9 #endif 10 11 /* 12 LITTLE_ENDIAN_UNALIGN means: 13 1) CPU is LITTLE_ENDIAN 14 2) it's allowed to make unaligned memory accesses 15 if LITTLE_ENDIAN_UNALIGN is not defined, it means that we don't know 16 about these properties of platform. 17 */ 18 19 #if defined(_M_IX86) || defined(_M_X64) || defined(_M_AMD64) || defined(__i386__) || defined(__x86_64__) 20 #define LITTLE_ENDIAN_UNALIGN 21 #endif 22 23 #ifdef LITTLE_ENDIAN_UNALIGN 24 25 #define GetUi16(p) (*(const UInt16 *)(p)) 26 #define GetUi32(p) (*(const UInt32 *)(p)) 27 #define GetUi64(p) (*(const UInt64 *)(p)) 28 #define SetUi16(p, d) *(UInt16 *)(p) = (d); 29 #define SetUi32(p, d) *(UInt32 *)(p) = (d); 30 31 #else 32 33 #define GetUi16(p) (((const Byte *)(p))[0] | ((UInt16)((const Byte *)(p))[1] << 8)) 34 35 #define GetUi32(p) ( \ 36 ((const Byte *)(p))[0] | \ 37 ((UInt32)((const Byte *)(p))[1] << 8) | \ 38 ((UInt32)((const Byte *)(p))[2] << 16) | \ 39 ((UInt32)((const Byte *)(p))[3] << 24)) 40 41 #define GetUi64(p) (GetUi32(p) | ((UInt64)GetUi32(((const Byte *)(p)) + 4) << 32)) 42 43 #define SetUi16(p, d) { UInt32 _x_ = (d); \ 44 ((Byte *)(p))[0] = (Byte)_x_; \ 45 ((Byte *)(p))[1] = (Byte)(_x_ >> 8); } 46 47 #define SetUi32(p, d) { UInt32 _x_ = (d); \ 48 ((Byte *)(p))[0] = (Byte)_x_; \ 49 ((Byte *)(p))[1] = (Byte)(_x_ >> 8); \ 50 ((Byte *)(p))[2] = (Byte)(_x_ >> 16); \ 51 ((Byte *)(p))[3] = (Byte)(_x_ >> 24); } 52 53 #endif 54 55 #if defined(LITTLE_ENDIAN_UNALIGN) && defined(_WIN64) && (_MSC_VER >= 1300) 56 57 #pragma intrinsic(_byteswap_ulong) 58 #pragma intrinsic(_byteswap_uint64) 59 #define GetBe32(p) _byteswap_ulong(*(const UInt32 *)(const Byte *)(p)) 60 #define GetBe64(p) _byteswap_uint64(*(const UInt64 *)(const Byte *)(p)) 61 62 #else 63 64 #define GetBe32(p) ( \ 65 ((UInt32)((const Byte *)(p))[0] << 24) | \ 66 ((UInt32)((const Byte *)(p))[1] << 16) | \ 67 ((UInt32)((const Byte *)(p))[2] << 8) | \ 68 ((const Byte *)(p))[3] ) 69 70 #define GetBe64(p) (((UInt64)GetBe32(p) << 32) | GetBe32(((const Byte *)(p)) + 4)) 71 72 #endif 73 74 #define GetBe16(p) (((UInt16)((const Byte *)(p))[0] << 8) | ((const Byte *)(p))[1]) 75 76 #ifdef __cplusplus 77 } 78 #endif 79 80 #endif 81