79 lines
1.5 KiB
C++
79 lines
1.5 KiB
C++
//
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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/sha.h>
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extern "C" {
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void sha1_block_x86(SHA_CTX *ctx, unsigned char *buffer,int num);
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}
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void main(int argc,char *argv[])
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{
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unsigned char buffer[64*256];
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SHA_CTX ctx;
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unsigned long s1,s2,e1,e2;
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unsigned char k[16];
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unsigned long data[2];
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unsigned char iv[8];
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int i,num=0,numm;
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int j=0;
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if (argc >= 2)
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num=atoi(argv[1]);
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if (num == 0) num=16;
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if (num > 250) num=16;
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numm=num+2;
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num*=64;
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numm*=64;
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for (j=0; j<6; j++)
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{
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for (i=0; i<10; i++) /**/
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{
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sha1_block_x86(&ctx,buffer,numm);
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GetTSC(s1);
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sha1_block_x86(&ctx,buffer,numm);
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GetTSC(e1);
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GetTSC(s2);
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sha1_block_x86(&ctx,buffer,num);
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GetTSC(e2);
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sha1_block_x86(&ctx,buffer,num);
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}
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printf("sha1 (%d bytes) %d %d (%.2f)\n",num,
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e1-s1,e2-s2,(double)((e1-s1)-(e2-s2))/2);
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}
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}
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