cpu.h

#ifndef CRYPTOPP_CPU_H
#define CRYPTOPP_CPU_H

#include "config.h"

#ifdef CRYPTOPP_MSVC6PP_OR_LATER
        #include <emmintrin.h>
#endif

NAMESPACE_BEGIN(CryptoPP)

#if defined(CRYPTOPP_X86_ASM_AVAILABLE) || (_MSC_VER >= 1400 && CRYPTOPP_BOOL_X64)

#define CRYPTOPP_CPUID_AVAILABLE

// these should not be used directly
extern CRYPTOPP_DLL bool g_x86DetectionDone;
extern CRYPTOPP_DLL bool g_hasSSE2;
extern CRYPTOPP_DLL bool g_hasMMX;
extern CRYPTOPP_DLL bool g_hasSSSE3;
extern CRYPTOPP_DLL bool g_isP4;
extern CRYPTOPP_DLL word32 g_cacheLineSize;
CRYPTOPP_DLL void DetectX86Features();

CRYPTOPP_DLL bool CpuId(word32 input, word32 *output);

#if CRYPTOPP_BOOL_X64
inline bool HasSSE2()   {return true;}
inline bool HasMMX()    {return true;}
#else

inline bool HasSSE2()
{
        if (!g_x86DetectionDone)
                DetectX86Features();
        return g_hasSSE2;
}

inline bool HasMMX()
{
        if (!g_x86DetectionDone)
                DetectX86Features();
        return g_hasMMX;
}

#endif

inline bool HasSSSE3()
{
        if (!g_x86DetectionDone)
                DetectX86Features();
        return g_hasSSSE3;
}

inline bool IsP4()
{
        if (!g_x86DetectionDone)
                DetectX86Features();
        return g_isP4;
}

inline int GetCacheLineSize()
{
        if (!g_x86DetectionDone)
                DetectX86Features();
        return g_cacheLineSize;
}

#else

inline int GetCacheLineSize()
{
        return CRYPTOPP_L1_CACHE_LINE_SIZE;
}

inline bool HasSSSE3()  {return false;}
inline bool IsP4()              {return false;}

// assume MMX and SSE2 if intrinsics are enabled
#if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE || CRYPTOPP_BOOL_X64
inline bool HasSSE2()   {return true;}
inline bool HasMMX()    {return true;}
#else
inline bool HasSSE2()   {return false;}
inline bool HasMMX()    {return false;}
#endif

#endif          // #ifdef CRYPTOPP_X86_ASM_AVAILABLE || _MSC_VER >= 1400

#if defined(__GNUC__)
        // define these in two steps to allow arguments to be expanded
        #define GNU_AS1(x) #x ";"
        #define GNU_AS2(x, y) #x ", " #y ";"
        #define GNU_AS3(x, y, z) #x ", " #y ", " #z ";"
        #define GNU_ASL(x) "\n" #x ":"
        #define GNU_ASJ(x, y, z) #x " " #y #z ";"
        #define AS1(x) GNU_AS1(x)
        #define AS2(x, y) GNU_AS2(x, y)
        #define AS3(x, y, z) GNU_AS3(x, y, z)
        #define ASS(x, y, a, b, c, d) #x ", " #y ", " #a "*64+" #b "*16+" #c "*4+" #d ";"
        #define ASL(x) GNU_ASL(x)
        #define ASJ(x, y, z) GNU_ASJ(x, y, z)
        #define ASC(x, y) #x " " #y ";"
        #define CRYPTOPP_NAKED
#else
        #define AS1(x) __asm {x}
        #define AS2(x, y) __asm {x, y}
        #define AS3(x, y, z) __asm {x, y, z}
        #define ASS(x, y, a, b, c, d) __asm {x, y, _MM_SHUFFLE(a, b, c, d)}
        #define ASL(x) __asm {label##x:}
        #define ASJ(x, y, z) __asm {x label##y}
        #define ASC(x, y) __asm {x label##y}
        #define CRYPTOPP_NAKED __declspec(naked)
#endif

// GNU assembler doesn't seem to have mod operator
#define ASM_MOD(x, y) ((x)-((x)/(y))*(y))

#if CRYPTOPP_BOOL_X86
        #define WORD_SZ 4
        #define WORD_REG(x)     e##x
        #define WORD_PTR DWORD PTR
        #define AS_PUSH(x) AS1(push e##x)
        #define AS_POP(x) AS1(pop e##x)
#elif CRYPTOPP_BOOL_X64
        #define WORD_SZ 8
        #define WORD_REG(x)     r##x
        #define WORD_PTR QWORD PTR
        #define AS_PUSH(x) AS1(pushq r##x)
        #define AS_POP(x) AS1(popq r##x)
#endif

NAMESPACE_END

#endif

---