Here is a fun program that not only shows how to get precise timings by using the time stamp counter, it also shows how to call main recursively. This is a C program. C++ will not allow calls to main.
#include "stdio.h"
#include "Windows.h" // Required for Sleep
#define CPUID __asm __emit 0fh __asm __emit 0a2h
#define RDTSC __asm __emit 0fh __asm __emit 031h //Not needed in latest Microsoft Visual Studio
unsigned __int64 getCycles(void);
unsigned __int64 TNEW, TOLD;
__declspec(naked)
unsigned __int64 __cdecl rdtsc(void) {
__asm
{
rdtsc
ret
}
}
int main(int Argc, char *Argv[], char *Arge[])
{
printf("Hi %d %s ", Argc, *Argv);
printf("%I64u %I64u ", getCycles(), rdtsc());
Sleep(10000);
TNEW = rdtsc();
printf("%I64u\n", TNEW - TOLD);
TOLD = TNEW;
if (Argc) main(--Argc, ++Argv, Arge);
else
while (*Arge) printf("%s ", *Arge++);
return 0;
}
unsigned __int64 getCycles()
{
__asm {
RDTSC
}
}
This member has not yet provided a Biography. Assume it's interesting and varied, and probably something to do with programming.