| // |
| // 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_encrypt1(&data[0],key,1); |
| GetTSC(s1); |
| des_encrypt1(&data[0],key,1); |
| des_encrypt1(&data[0],key,1); |
| des_encrypt1(&data[0],key,1); |
| GetTSC(e1); |
| GetTSC(s2); |
| des_encrypt1(&data[0],key,1); |
| des_encrypt1(&data[0],key,1); |
| des_encrypt1(&data[0],key,1); |
| des_encrypt1(&data[0],key,1); |
| GetTSC(e2); |
| des_encrypt1(&data[0],key,1); |
| } |
| |
| printf("des %d %d (%d)\n", |
| e1-s1,e2-s2,((e2-s2)-(e1-s1))); |
| } |
| } |
| |