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@unixg.ubc.ca) 7// in 1996-7 and is entered, by him, into the public domain. 8 9#if defined(__WATCOMC__) 10void GetTSC(unsigned long&); 11#pragma aux GetTSC = 0x0f 0x31 "mov [edi], eax" parm [edi] modify [edx eax]; 12#elif defined(__GNUC__) 13inline 14void 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) 22inline 23void 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/sha.h> 36 37extern "C" { 38void sha1_block_x86(SHA_CTX *ctx, unsigned char *buffer,int num); 39} 40 41void main(int argc,char *argv[]) 42 { 43 unsigned char buffer[64*256]; 44 SHA_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 sha1_block_x86(&ctx,buffer,numm); 66 GetTSC(s1); 67 sha1_block_x86(&ctx,buffer,numm); 68 GetTSC(e1); 69 GetTSC(s2); 70 sha1_block_x86(&ctx,buffer,num); 71 GetTSC(e2); 72 sha1_block_x86(&ctx,buffer,num); 73 } 74 75 printf("sha1 (%d bytes) %d %d (%.2f)\n",num, 76 e1-s1,e2-s2,(double)((e1-s1)-(e2-s2))/2); 77 } 78 } 79 80