//

// gettsc.inl

//

// gives access to the Pentium's (secret) cycle counter

//

// This software was written by Leonard Janke (janke@unixg.ubc.ca)

// in 1996-7 and is entered, by him, into the public domain.

#if defined(__WATCOMC__)

void GetTSC(unsigned long&);

#pragma aux GetTSC = 0x0f 0x31 "mov [edi], eax" parm [edi] modify [edx eax];

#elif defined(__GNUC__)

inline

void GetTSC(unsigned long& tsc)

{

  asm volatile(".byte 15, 49\n\t"

	       : "=eax" (tsc)

	       :

	       : "%edx", "%eax");

}

#elif defined(_MSC_VER)

inline

void GetTSC(unsigned long& tsc)

{

  unsigned long a;

  __asm _emit 0fh

  __asm _emit 31h

  __asm mov a, eax;

  tsc=a;

}

#endif      

#include <stdio.h>

#include <stdlib.h>

#include <openssl/des.h>

void main(int argc,char *argv[])

	{

	des_key_schedule key;

	unsigned long s1,s2,e1,e2;

	unsigned long data[2];

	int i,j;

	for (j=0; j<6; j++)

		{

		for (i=0; i<1000; i++) /**/

			{

			des_encrypt1(&data[0],key,1);

			GetTSC(s1);

			des_encrypt1(&data[0],key,1);

			des_encrypt1(&data[0],key,1);

			des_encrypt1(&data[0],key,1);

			GetTSC(e1);

			GetTSC(s2);

			des_encrypt1(&data[0],key,1);

			des_encrypt1(&data[0],key,1);

			des_encrypt1(&data[0],key,1);

			des_encrypt1(&data[0],key,1);

			GetTSC(e2);

			des_encrypt1(&data[0],key,1);

			}

		printf("des %d %d (%d)\n",

			e1-s1,e2-s2,((e2-s2)-(e1-s1)));

		}

	}