4 // gives access to the Pentium's (secret) cycle counter
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.
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__)
14 void GetTSC(unsigned long& tsc)
16 asm volatile(".byte 15, 49\n\t"
21 #elif defined(_MSC_VER)
23 void GetTSC(unsigned long& tsc)
37 void main(int argc,char *argv[])
40 unsigned long s1,s2,e1,e2;
41 unsigned long data[2];
46 for (i=0; i<1000; i++) /**/
48 CAST_encrypt(&data[0],&key);
50 CAST_encrypt(&data[0],&key);
51 CAST_encrypt(&data[0],&key);
52 CAST_encrypt(&data[0],&key);
55 CAST_encrypt(&data[0],&key);
56 CAST_encrypt(&data[0],&key);
57 CAST_encrypt(&data[0],&key);
58 CAST_encrypt(&data[0],&key);
60 CAST_encrypt(&data[0],&key);
63 printf("cast %d %d (%d)\n",
64 e1-s1,e2-s2,((e2-s2)-(e1-s1)));