// // 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/des.h> void main(int argc,char *argv[]) { des_key_schedule key; unsigned long s1,s2,e1,e2; unsigned long data[2]; int i,j; for (j=0; j<6; j++) { for (i=0; i<1000; i++) /**/ { des_encrypt(&data[0],key,1); GetTSC(s1); des_encrypt(&data[0],key,1); des_encrypt(&data[0],key,1); des_encrypt(&data[0],key,1); GetTSC(e1); GetTSC(s2); des_encrypt(&data[0],key,1); des_encrypt(&data[0],key,1); des_encrypt(&data[0],key,1); des_encrypt(&data[0],key,1); GetTSC(e2); des_encrypt(&data[0],key,1); } printf("des %d %d (%d)\n", e1-s1,e2-s2,((e2-s2)-(e1-s1))); } }