sl@0: //
sl@0: // gettsc.inl
sl@0: //
sl@0: // gives access to the Pentium's (secret) cycle counter
sl@0: //
sl@0: // This software was written by Leonard Janke (janke@unixg.ubc.ca)
sl@0: // in 1996-7 and is entered, by him, into the public domain.
sl@0: 
sl@0: #if defined(__WATCOMC__)
sl@0: void GetTSC(unsigned long&);
sl@0: #pragma aux GetTSC = 0x0f 0x31 "mov [edi], eax" parm [edi] modify [edx eax];
sl@0: #elif defined(__GNUC__)
sl@0: inline
sl@0: void GetTSC(unsigned long& tsc)
sl@0: {
sl@0:   asm volatile(".byte 15, 49\n\t"
sl@0: 	       : "=eax" (tsc)
sl@0: 	       :
sl@0: 	       : "%edx", "%eax");
sl@0: }
sl@0: #elif defined(_MSC_VER)
sl@0: inline
sl@0: void GetTSC(unsigned long& tsc)
sl@0: {
sl@0:   unsigned long a;
sl@0:   __asm _emit 0fh
sl@0:   __asm _emit 31h
sl@0:   __asm mov a, eax;
sl@0:   tsc=a;
sl@0: }
sl@0: #endif      
sl@0: 
sl@0: #include <stdio.h>
sl@0: #include <stdlib.h>
sl@0: #include <openssl/des.h>
sl@0: 
sl@0: void main(int argc,char *argv[])
sl@0: 	{
sl@0: 	des_key_schedule key;
sl@0: 	unsigned long s1,s2,e1,e2;
sl@0: 	unsigned long data[2];
sl@0: 	int i,j;
sl@0: 
sl@0: 	for (j=0; j<6; j++)
sl@0: 		{
sl@0: 		for (i=0; i<1000; i++) /**/
sl@0: 			{
sl@0: 			des_encrypt1(&data[0],key,1);
sl@0: 			GetTSC(s1);
sl@0: 			des_encrypt1(&data[0],key,1);
sl@0: 			des_encrypt1(&data[0],key,1);
sl@0: 			des_encrypt1(&data[0],key,1);
sl@0: 			GetTSC(e1);
sl@0: 			GetTSC(s2);
sl@0: 			des_encrypt1(&data[0],key,1);
sl@0: 			des_encrypt1(&data[0],key,1);
sl@0: 			des_encrypt1(&data[0],key,1);
sl@0: 			des_encrypt1(&data[0],key,1);
sl@0: 			GetTSC(e2);
sl@0: 			des_encrypt1(&data[0],key,1);
sl@0: 			}
sl@0: 
sl@0: 		printf("des %d %d (%d)\n",
sl@0: 			e1-s1,e2-s2,((e2-s2)-(e1-s1)));
sl@0: 		}
sl@0: 	}
sl@0: