CWE-ou-minkata/Sources/Plasma/CoreLib/hsCpuID.cpp

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*==LICENSE==*/

#include "hsCompilerSpecific.h"

#if defined(HAVE_CPUID)
#  if defined(_MSC_VER) || ((defined(_WIN32) || defined(_WIN64)) && defined(__INTEL_COMPILER))
#    include <intrin.h>
#    define MSC_COMPATIBLE
#  elif defined(__GNUC__)
#    include <cpuid.h>
#    define GCC_COMPATIBLE
#  else
#    define SOFTWARE_ONLY
#  endif
#else
#  define SOFTWARE_ONLY
#endif

#include "hsCpuID.h"

hsCpuId::hsCpuId() {
    const unsigned int sse1_flag = 1<<25;
    const unsigned int sse2_flag = 1<<26;
    const unsigned int sse3_flag = 1<<0;
    const unsigned int ssse3_flag = 1<<9;
    const unsigned int sse41_flag = 1<<19;
    const unsigned int sse42_flag = 1<<20;
    const unsigned int avx_flag = 1<<28;

    unsigned int ax = 0, bx = 0, cx = 0, dx = 0;


    /**
     * Portable implementation of CPUID, successfully tested with:
     *   - Microsoft Visual Studio 2010,
     *   - GNU GCC 4.5,
     *   - Intel C++ Compiler 12.0
     *   - Sun Studio 12,
     *   - AMD x86 Open64 Compiler Suite.
     *
     * Ref: http://primesieve.googlecode.com/svn-history/r388/trunk/soe/cpuid.h
     */
    #if defined(MSC_COMPATIBLE)
      int CPUInfo[4] = {ax, bx, cx, dx};
      __cpuid(CPUInfo, 0);

      // check if the CPU supports the cpuid instruction.
      if (CPUInfo[0] != 0) {
        __cpuid(CPUInfo, 1);
        ax = CPUInfo[0];
        bx = CPUInfo[1];
        cx = CPUInfo[2];
        dx = CPUInfo[3];
      }
    #elif defined(GCC_COMPATIBLE)
      __get_cpuid(1, &ax, &bx, &cx, &dx);
    #endif


    has_sse1    = (dx & sse1_flag)  || false;
    has_sse2    = (dx & sse2_flag)  || false;
    has_sse3    = (cx & sse3_flag)  || false;
    has_ssse3   = (cx & ssse3_flag) || false;
    has_sse41   = (cx & sse41_flag) || false;
    has_sse42   = (cx & sse42_flag) || false;
    has_avx     = (cx & avx_flag)   || false;
}

const hsCpuId& hsCpuId::instance()
{
    static hsCpuId self;
    return self;
}