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/md5.h> 36 37 extern "C" { 38 void md5_block_x86(MD5_CTX *ctx, unsigned char *buffer,int num); 39 } 40 41 void main(int argc,char *argv[]) 42 { 43 unsigned char buffer[64*256]; 44 MD5_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 md5_block_x86(&ctx,buffer,numm); 66 GetTSC(s1); 67 md5_block_x86(&ctx,buffer,numm); 68 GetTSC(e1); 69 GetTSC(s2); 70 md5_block_x86(&ctx,buffer,num); 71 GetTSC(e2); 72 md5_block_x86(&ctx,buffer,num); 73 } 74 printf("md5 (%d bytes) %d %d (%.2f)\n",num, 75 e1-s1,e2-s2,(double)((e1-s1)-(e2-s2))/2); 76 } 77 } 78 79
