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| 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__) | |
| 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 | |
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