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/des.h> 36 37 void main(int argc,char *argv[]) 38 { 39 des_key_schedule key; 40 unsigned long s1,s2,e1,e2; 41 unsigned long data[2]; 42 int i,j; 43 44 for (j=0; j<6; j++) 45 { 46 for (i=0; i<1000; i++) /**/ 47 { 48 des_encrypt1(&data[0],key,1); 49 GetTSC(s1); 50 des_encrypt1(&data[0],key,1); 51 des_encrypt1(&data[0],key,1); 52 des_encrypt1(&data[0],key,1); 53 GetTSC(e1); 54 GetTSC(s2); 55 des_encrypt1(&data[0],key,1); 56 des_encrypt1(&data[0],key,1); 57 des_encrypt1(&data[0],key,1); 58 des_encrypt1(&data[0],key,1); 59 GetTSC(e2); 60 des_encrypt1(&data[0],key,1); 61 } 62 63 printf("des %d %d (%d)\n", 64 e1-s1,e2-s2,((e2-s2)-(e1-s1))); 65 } 66 } 67 68
