/* CpuArch.h -- CPU specific code
2015-12-01: Igor Pavlov : Public domain */

#ifndef __CPU_ARCH_H
#define __CPU_ARCH_H

#include "7zTypes.h"

EXTERN_C_BEGIN

/*
MY_CPU_LE means that CPU is LITTLE ENDIAN.
MY_CPU_BE means that CPU is BIG ENDIAN.
If MY_CPU_LE and MY_CPU_BE are not defined, we don't know about ENDIANNESS of platform.

MY_CPU_LE_UNALIGN means that CPU is LITTLE ENDIAN and CPU supports unaligned memory accesses.
*/

#if defined(_M_X64) \
   || defined(_M_AMD64) \
   || defined(__x86_64__) \
   || defined(__AMD64__) \
   || defined(__amd64__)
  #define MY_CPU_AMD64
#endif

#if defined(MY_CPU_AMD64) \
    || defined(_M_IA64) \
    || defined(__AARCH64EL__) \
    || defined(__AARCH64EB__)
  #define MY_CPU_64BIT
#endif

#if defined(_M_IX86) || defined(__i386__)
#define MY_CPU_X86
#endif

#if defined(MY_CPU_X86) || defined(MY_CPU_AMD64)
#define MY_CPU_X86_OR_AMD64
#endif

#if defined(MY_CPU_X86) \
    || defined(_M_ARM) \
    || defined(__ARMEL__) \
    || defined(__THUMBEL__) \
    || defined(__ARMEB__) \
    || defined(__THUMBEB__)
  #define MY_CPU_32BIT
#endif

#if defined(_WIN32) && defined(_M_ARM)
#define MY_CPU_ARM_LE
#endif

#if defined(_WIN32) && defined(_M_IA64)
#define MY_CPU_IA64_LE
#endif

#if defined(MY_CPU_X86_OR_AMD64) \
    || defined(MY_CPU_ARM_LE) \
    || defined(MY_CPU_IA64_LE) \
    || defined(__LITTLE_ENDIAN__) \
    || defined(__ARMEL__) \
    || defined(__THUMBEL__) \
    || defined(__AARCH64EL__) \
    || defined(__MIPSEL__) \
    || defined(__MIPSEL) \
    || defined(_MIPSEL) \
    || (defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__))
  #define MY_CPU_LE
#endif

#if defined(__BIG_ENDIAN__) \
    || defined(__ARMEB__) \
    || defined(__THUMBEB__) \
    || defined(__AARCH64EB__) \
    || defined(__MIPSEB__) \
    || defined(__MIPSEB) \
    || defined(_MIPSEB) \
    || defined(__m68k__) \
    || defined(__s390__) \
    || defined(__s390x__) \
    || defined(__zarch__) \
    || (defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__))
  #define MY_CPU_BE
#endif

#if defined(MY_CPU_LE) && defined(MY_CPU_BE)
Stop_Compiling_Bad_Endian
#endif


#ifdef MY_CPU_LE
  #if defined(MY_CPU_X86_OR_AMD64) \
      /* || defined(__AARCH64EL__) */
    #define MY_CPU_LE_UNALIGN
  #endif
#endif


#ifdef MY_CPU_LE_UNALIGN

#define GetUi16(p) (*(const UInt16 *)(const void *)(p))
#define GetUi32(p) (*(const UInt32 *)(const void *)(p))
#define GetUi64(p) (*(const UInt64 *)(const void *)(p))

#define SetUi16(p, v) { *(UInt16 *)(p) = (v); }
#define SetUi32(p, v) { *(UInt32 *)(p) = (v); }
#define SetUi64(p, v) { *(UInt64 *)(p) = (v); }

#else

#define GetUi16(p) ( (UInt16) ( \
             ((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 SetUi16(p, v) { Byte *_ppp_ = (Byte *)(p); UInt32 _vvv_ = (v); \
    _ppp_[0] = (Byte)_vvv_; \
    _ppp_[1] = (Byte)(_vvv_ >> 8); }

#define SetUi32(p, v) { Byte *_ppp_ = (Byte *)(p); UInt32 _vvv_ = (v); \
    _ppp_[0] = (Byte)_vvv_; \
    _ppp_[1] = (Byte)(_vvv_ >> 8); \
    _ppp_[2] = (Byte)(_vvv_ >> 16); \
    _ppp_[3] = (Byte)(_vvv_ >> 24); }

#define SetUi64(p, v) { Byte *_ppp2_ = (Byte *)(p); UInt64 _vvv2_ = (v); \
    SetUi32(_ppp2_    , (UInt32)_vvv2_); \
    SetUi32(_ppp2_ + 4, (UInt32)(_vvv2_ >> 32)); }

#endif


#if defined(MY_CPU_LE_UNALIGN) && /* defined(_WIN64) && */ (_MSC_VER >= 1300)

/* Note: we use bswap instruction, that is unsupported in 386 cpu */

#include <stdlib.h>

#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))

#define SetBe32(p, v) (*(UInt32 *)(void *)(p)) = _byteswap_ulong(v)

#elif defined(MY_CPU_LE_UNALIGN) && defined (__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))

#define GetBe32(p) __builtin_bswap32(*(const UInt32 *)(const Byte *)(p))
#define GetBe64(p) __builtin_bswap64(*(const UInt64 *)(const Byte *)(p))

#define SetBe32(p, v) (*(UInt32 *)(void *)(p)) = __builtin_bswap32(v)

#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))

#define SetBe32(p, v) { Byte *_ppp_ = (Byte *)(p); UInt32 _vvv_ = (v); \
    _ppp_[0] = (Byte)(_vvv_ >> 24); \
    _ppp_[1] = (Byte)(_vvv_ >> 16); \
    _ppp_[2] = (Byte)(_vvv_ >> 8); \
    _ppp_[3] = (Byte)_vvv_; }

#endif


#define GetBe16(p) ( (UInt16) ( \
    ((UInt16)((const Byte *)(p))[0] << 8) | \
             ((const Byte *)(p))[1] ))


#ifdef MY_CPU_X86_OR_AMD64

typedef struct
{
  UInt32 maxFunc;
  UInt32 vendor[3];
  UInt32 ver;
  UInt32 b;
  UInt32 c;
  UInt32 d;
} Cx86cpuid;

enum
{
  CPU_FIRM_INTEL,
  CPU_FIRM_AMD,
  CPU_FIRM_VIA
};

void MyCPUID(UInt32 function, UInt32 *a, UInt32 *b, UInt32 *c, UInt32 *d);

Bool x86cpuid_CheckAndRead(Cx86cpuid *p);
int x86cpuid_GetFirm(const Cx86cpuid *p);

#define x86cpuid_GetFamily(ver) (((ver >> 16) & 0xFF0) | ((ver >> 8) & 0xF))
#define x86cpuid_GetModel(ver)  (((ver >> 12) &  0xF0) | ((ver >> 4) & 0xF))
#define x86cpuid_GetStepping(ver) (ver & 0xF)

Bool CPU_Is_InOrder();
Bool CPU_Is_Aes_Supported();

#endif

EXTERN_C_END

#endif