cpuid.cpp

Go to the documentation of this file.

 
#include <array>
#include <cstdint>
#include <string_view>
#include <cpuid.h>
#include "attributes/common.hpp"
#include "cpuid.hpp"
 
namespace ein {
 
ein_pure cpuid_t cpuid(int32_t eax, int32_t ecx) noexcept {
  cpuid_t result;
  __cpuid_count(eax, ecx, result.eax, result.ebx, result.ecx, result.edx);
  return result;
}
 
const enum cpu_vendor cpu_vendor = [] static noexcept {
  auto result = cpuid(0, 0);
  std::array<int32_t, 3> data = { result.ebx, result.edx, result.ecx };
  std::string_view vendor {reinterpret_cast<char const *>(begin(data)), 12};
  using enum cpu_vendor;
  if      (vendor == "GenuineIntel") return intel;
  else if (vendor == "AuthenticAMD") return amd;
  else                               return unknown;
}();
 
} // end namespace ein