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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 key1,key2,key3; | |
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_encrypt3(&data[0],key1,key2,key3); | |
49 GetTSC(s1); | |
50 des_encrypt3(&data[0],key1,key2,key3); | |
51 des_encrypt3(&data[0],key1,key2,key3); | |
52 des_encrypt3(&data[0],key1,key2,key3); | |
53 GetTSC(e1); | |
54 GetTSC(s2); | |
55 des_encrypt3(&data[0],key1,key2,key3); | |
56 des_encrypt3(&data[0],key1,key2,key3); | |
57 des_encrypt3(&data[0],key1,key2,key3); | |
58 des_encrypt3(&data[0],key1,key2,key3); | |
59 GetTSC(e2); | |
60 des_encrypt3(&data[0],key1,key2,key3); | |
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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