source: trunk/sys/libcrypto/others/md5/md5s.cpp @ 50

//
// 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/md5.h>

extern "C" {
void md5_block_x86(MD5_CTX *ctx, unsigned char *buffer,int num);
}

void main(int argc,char *argv[])
        {
        unsigned char buffer[64*256];
        MD5_CTX ctx;
        unsigned long s1,s2,e1,e2;
        unsigned char k[16];
        unsigned long data[2];
        unsigned char iv[8];
        int i,num=0,numm;
        int j=0;

        if (argc >= 2)
                num=atoi(argv[1]);

        if (num == 0) num=16;
        if (num > 250) num=16;
        numm=num+2;
        num*=64;
        numm*=64;

        for (j=0; j<6; j++)
                {
                for (i=0; i<10; i++) /**/
                        {
                        md5_block_x86(&ctx,buffer,numm);
                        GetTSC(s1);
                        md5_block_x86(&ctx,buffer,numm);
                        GetTSC(e1);
                        GetTSC(s2);
                        md5_block_x86(&ctx,buffer,num);
                        GetTSC(e2);
                        md5_block_x86(&ctx,buffer,num);
                        }
                printf("md5 (%d bytes) %d %d (%.2f)\n",num,
                        e1-s1,e2-s2,(double)((e1-s1)-(e2-s2))/2);
                }
        }