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- //
- // gettsc.inl
- //
- // gives access to the Pentium's (secret) cycle counter
- //
- // This software was written by Leonard Janke (janke@unixg.ubc.ca)
- // in 1996-7 and is entered, by him, into the public domain.
- #if defined(__WATCOMC__)
- void GetTSC(unsigned long&);
- #pragma aux GetTSC = 0x0f 0x31 "mov [edi], eax" parm [edi] modify [edx eax];
- #elif defined(__GNUC__)
- inline
- void GetTSC(unsigned long& tsc)
- {
- asm volatile(".byte 15, 49\n\t"
- : "=eax" (tsc)
- :
- : "%edx", "%eax");
- }
- #elif defined(_MSC_VER)
- inline
- void GetTSC(unsigned long& tsc)
- {
- unsigned long a;
- __asm _emit 0fh
- __asm _emit 31h
- __asm mov a, eax;
- tsc=a;
- }
- #endif
- #include <stdio.h>
- #include <stdlib.h>
- #include <openssl/sha.h>
- #define sha1_block_x86 sha1_block_asm_data_order
- extern "C" {
- void sha1_block_x86(SHA_CTX *ctx, unsigned char *buffer,int num);
- }
- void main(int argc,char *argv[])
- {
- unsigned char buffer[64*256];
- SHA_CTX ctx;
- unsigned long s1,s2,e1,e2;
- unsigned char k[16];
- unsigned long data[2];
- unsigned char iv[8];
- int i,num=0,numm;
- int j=0;
- if (argc >= 2)
- num=atoi(argv[1]);
- if (num == 0) num=16;
- if (num > 250) num=16;
- numm=num+2;
- #if 0
- num*=64;
- numm*=64;
- #endif
- for (j=0; j<6; j++)
- {
- for (i=0; i<10; i++) /**/
- {
- sha1_block_x86(&ctx,buffer,numm);
- GetTSC(s1);
- sha1_block_x86(&ctx,buffer,numm);
- GetTSC(e1);
- GetTSC(s2);
- sha1_block_x86(&ctx,buffer,num);
- GetTSC(e2);
- sha1_block_x86(&ctx,buffer,num);
- }
- printf("sha1 (%d bytes) %d %d (%.2f)\n",num*64,
- e1-s1,e2-s2,(double)((e1-s1)-(e2-s2))/2);
- }
- }
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