release/src/router/dnscrypt/src/libnacl/cpucycles/amd64tscfreq.c

   1 #include <stdio.h>
   2 #include <sys/types.h>
   3
   4 long long cpucycles_amd64tscfreq(void)
   5 {
   6   unsigned long long result;
   7   asm volatile(".byte 15;.byte 49;shlq $32,%%rdx;orq %%rdx,%%rax"
   8     : "=a" (result) ::  "%rdx");
   9   return result;
  10 }
  11
  12 long long cpucycles_amd64tscfreq_persecond(void)
  13 {
  14   long result = 0;
  15   size_t resultlen = sizeof(long);
  16   sysctlbyname("machdep.tsc_freq",&result,&resultlen,0,0);
  17   return result;
  18 }