cpuid.hpp

Go to the documentation of this file.

#pragma once
 
#include <cstdint>
#include "attributes/common.hpp"
 
using namespace std;
 
namespace ein {
 
struct ein_nodiscard cpuid_t {
  int32_t eax, ebx, ecx, edx;
};
 
ein_pure extern cpuid_t cpuid(int32_t eax, int32_t ecx) noexcept;
 
enum class ein_nodiscard cpu_vendor : uint8_t {
  intel=0,  
  amd=1,    
  unknown=2 
};
 
extern const enum cpu_vendor cpu_vendor;
 
} // end namespace ein
 
#if defined(EIN_TESTING) || defined(EIN_TESTING_CPUID)
TEST_CASE("cpuid","[cpuid]") {
  using namespace ein;
 
  SECTION("CPU vendor enum correctly identifies CPU") {
    CHECK((cpu_vendor == cpu_vendor::intel || cpu_vendor == cpu_vendor::amd));
  }
 
  SECTION("CPUID function retrieves processor info and feature bits") {
    cpuid_t result = cpuid(1, 0);
    bool sse2_supported = result.edx & (1 << 26);
    CHECK(sse2_supported);
  }
}
#endif