Get CPU Clock using Assembly Require 50 Cycle to run

getCPUClock.cpp

//://stackoverflow.com/questions/275004/c-timer-function-to-provide-time-in-nano-seconds

#include <time.h>
#include <iostream>
#include <string>
using namespace std;

inline __int64 GetCpuClocks()
{
    // Counter
    struct { __int32 low, high; } counter;

    // Use RDTSC instruction to get clocks count
    __asm push EAX
    __asm push EDX
    __asm __emit 0fh __asm __emit 031h // RDTSC
    __asm mov counter.low, EAX
    __asm mov counter.high, EDX
    __asm pop EDX
    __asm pop EAX

    // Return result
    return *(__int64 *)(&counter);

}

int main()
{
	__int64 t;

	t = GetCpuClocks();
	t = GetCpuClocks() - t;
	cout << t << " CPU Clocks" << "\n\n";
	return 0;
}