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67 lines
1.3 KiB
67 lines
1.3 KiB
// |
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// gettsc.inl |
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// |
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// gives access to the Pentium's (secret) cycle counter |
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// |
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// This software was written by Leonard Janke (janke@unixg.ubc.ca) |
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// in 1996-7 and is entered, by him, into the public domain. |
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#if defined(__WATCOMC__) |
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void GetTSC(unsigned long&); |
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#pragma aux GetTSC = 0x0f 0x31 "mov [edi], eax" parm [edi] modify [edx eax]; |
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#elif defined(__GNUC__) |
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inline |
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void GetTSC(unsigned long& tsc) |
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{ |
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asm volatile(".byte 15, 49\n\t" |
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: "=eax" (tsc) |
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: |
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: "%edx", "%eax"); |
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} |
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#elif defined(_MSC_VER) |
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inline |
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void GetTSC(unsigned long& tsc) |
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{ |
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unsigned long a; |
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__asm _emit 0fh |
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__asm _emit 31h |
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__asm mov a, eax; |
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tsc=a; |
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} |
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#endif |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <openssl/des.h> |
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void main(int argc,char *argv[]) |
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{ |
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des_key_schedule key; |
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unsigned long s1,s2,e1,e2; |
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unsigned long data[2]; |
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int i,j; |
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for (j=0; j<6; j++) |
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{ |
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for (i=0; i<1000; i++) /**/ |
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{ |
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des_encrypt(&data[0],key,1); |
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GetTSC(s1); |
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des_encrypt(&data[0],key,1); |
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des_encrypt(&data[0],key,1); |
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des_encrypt(&data[0],key,1); |
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GetTSC(e1); |
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GetTSC(s2); |
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des_encrypt(&data[0],key,1); |
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des_encrypt(&data[0],key,1); |
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des_encrypt(&data[0],key,1); |
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des_encrypt(&data[0],key,1); |
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GetTSC(e2); |
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des_encrypt(&data[0],key,1); |
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} |
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printf("des %d %d (%d)\n", |
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e1-s1,e2-s2,((e2-s2)-(e1-s1))); |
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} |
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} |
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