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      1 //
      2 // gettsc.inl
      3 //
      4 // gives access to the Pentium's (secret) cycle counter
      5 //
      6 // This software was written by Leonard Janke (janke (at) unixg.ubc.ca)
      7 // in 1996-7 and is entered, by him, into the public domain.
      8 
      9 #if defined(__WATCOMC__)
     10 void GetTSC(unsigned long&);
     11 #pragma aux GetTSC = 0x0f 0x31 "mov [edi], eax" parm [edi] modify [edx eax];
     12 #elif defined(__GNUC__)
     13 inline
     14 void GetTSC(unsigned long& tsc)
     15 {
     16   asm volatile(".byte 15, 49\n\t"
     17 	       : "=eax" (tsc)
     18 	       :
     19 	       : "%edx", "%eax");
     20 }
     21 #elif defined(_MSC_VER)
     22 inline
     23 void GetTSC(unsigned long& tsc)
     24 {
     25   unsigned long a;
     26   __asm _emit 0fh
     27   __asm _emit 31h
     28   __asm mov a, eax;
     29   tsc=a;
     30 }
     31 #endif
     32 
     33 #include <stdio.h>
     34 #include <stdlib.h>
     35 #include <openssl/md4.h>
     36 
     37 extern "C" {
     38 void md4_block_x86(MD4_CTX *ctx, unsigned char *buffer,int num);
     39 }
     40 
     41 void main(int argc,char *argv[])
     42 	{
     43 	unsigned char buffer[64*256];
     44 	MD4_CTX ctx;
     45 	unsigned long s1,s2,e1,e2;
     46 	unsigned char k[16];
     47 	unsigned long data[2];
     48 	unsigned char iv[8];
     49 	int i,num=0,numm;
     50 	int j=0;
     51 
     52 	if (argc >= 2)
     53 		num=atoi(argv[1]);
     54 
     55 	if (num == 0) num=16;
     56 	if (num > 250) num=16;
     57 	numm=num+2;
     58 	num*=64;
     59 	numm*=64;
     60 
     61 	for (j=0; j<6; j++)
     62 		{
     63 		for (i=0; i<10; i++) /**/
     64 			{
     65 			md4_block_x86(&ctx,buffer,numm);
     66 			GetTSC(s1);
     67 			md4_block_x86(&ctx,buffer,numm);
     68 			GetTSC(e1);
     69 			GetTSC(s2);
     70 			md4_block_x86(&ctx,buffer,num);
     71 			GetTSC(e2);
     72 			md4_block_x86(&ctx,buffer,num);
     73 			}
     74 		printf("md4 (%d bytes) %d %d (%.2f)\n",num,
     75 			e1-s1,e2-s2,(double)((e1-s1)-(e2-s2))/2);
     76 		}
     77 	}
     78 
     79