mirror of
https://github.com/ZDoom/qzdoom.git
synced 2024-11-24 13:01:47 +00:00
69 lines
2 KiB
C
69 lines
2 KiB
C
/* CpuArch.h
|
|
2008-08-05
|
|
Igor Pavlov
|
|
Public domain */
|
|
|
|
#ifndef __CPUARCH_H
|
|
#define __CPUARCH_H
|
|
|
|
/*
|
|
LITTLE_ENDIAN_UNALIGN means:
|
|
1) CPU is LITTLE_ENDIAN
|
|
2) it's allowed to make unaligned memory accesses
|
|
if LITTLE_ENDIAN_UNALIGN is not defined, it means that we don't know
|
|
about these properties of platform.
|
|
*/
|
|
|
|
#if defined(_M_IX86) || defined(_M_X64) || defined(_M_AMD64) || defined(__i386__) || defined(__x86_64__)
|
|
#define LITTLE_ENDIAN_UNALIGN
|
|
#endif
|
|
|
|
#ifdef LITTLE_ENDIAN_UNALIGN
|
|
|
|
#define GetUi16(p) (*(const UInt16 *)(p))
|
|
#define GetUi32(p) (*(const UInt32 *)(p))
|
|
#define GetUi64(p) (*(const UInt64 *)(p))
|
|
#define SetUi32(p, d) *(UInt32 *)(p) = (d);
|
|
|
|
#else
|
|
|
|
#define GetUi16(p) (((const Byte *)(p))[0] | ((UInt16)((const Byte *)(p))[1] << 8))
|
|
|
|
#define GetUi32(p) ( \
|
|
((const Byte *)(p))[0] | \
|
|
((UInt32)((const Byte *)(p))[1] << 8) | \
|
|
((UInt32)((const Byte *)(p))[2] << 16) | \
|
|
((UInt32)((const Byte *)(p))[3] << 24))
|
|
|
|
#define GetUi64(p) (GetUi32(p) | ((UInt64)GetUi32(((const Byte *)(p)) + 4) << 32))
|
|
|
|
#define SetUi32(p, d) { UInt32 _x_ = (d); \
|
|
((Byte *)(p))[0] = (Byte)_x_; \
|
|
((Byte *)(p))[1] = (Byte)(_x_ >> 8); \
|
|
((Byte *)(p))[2] = (Byte)(_x_ >> 16); \
|
|
((Byte *)(p))[3] = (Byte)(_x_ >> 24); }
|
|
|
|
#endif
|
|
|
|
#if defined(LITTLE_ENDIAN_UNALIGN) && defined(_WIN64) && (_MSC_VER >= 1300)
|
|
|
|
#pragma intrinsic(_byteswap_ulong)
|
|
#pragma intrinsic(_byteswap_uint64)
|
|
#define GetBe32(p) _byteswap_ulong(*(const UInt32 *)(const Byte *)(p))
|
|
#define GetBe64(p) _byteswap_uint64(*(const UInt64 *)(const Byte *)(p))
|
|
|
|
#else
|
|
|
|
#define GetBe32(p) ( \
|
|
((UInt32)((const Byte *)(p))[0] << 24) | \
|
|
((UInt32)((const Byte *)(p))[1] << 16) | \
|
|
((UInt32)((const Byte *)(p))[2] << 8) | \
|
|
((const Byte *)(p))[3] )
|
|
|
|
#define GetBe64(p) (((UInt64)GetBe32(p) << 32) | GetBe32(((const Byte *)(p)) + 4))
|
|
|
|
#endif
|
|
|
|
#define GetBe16(p) (((UInt16)((const Byte *)(p))[0] << 8) | ((const Byte *)(p))[1])
|
|
|
|
#endif
|