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[haraka-avx512.git] / timing.h

#ifndef TIMING_H
#define TIMING_H

#define NUM_TIMINGS 10000
#define ITERATIONS 1000

int compareDouble(const void *x, const void *y)
{
  double xx = *(double*)x, yy = *(double*)y;
  if (xx < yy) return -1;
  if (xx > yy) return  1;
  return 0;
}

unsigned long long int startTimer(void)
{
   unsigned a, d;

   __asm__ volatile("CPUID\n\t"
                    "RDTSC\n\t"
                    "mov %%edx, %0\n\t"
                    "mov %%eax, %1\n\t": "=r" (d),
                    "=r" (a):: "%rax", "%rbx", "%rcx", "%rdx");

   return ((unsigned long long)a) | (((unsigned long long)d) << 32);;
}

unsigned long long int endTimer(void)
{
   unsigned a, d;

   __asm__ volatile("RDTSCP\n\t"
                    "mov %%edx, %0\n\t"
                    "mov %%eax,%1\n\t"
                    "CPUID\n\t": "=r" (d), "=r" (a)::
                    "%rax", "%rbx", "%rcx", "%rdx");

   return ((unsigned long long)a) | (((unsigned long long)d) << 32);;
}

#endif