Integer Math Profiling

imath-profile.c

#include <stdio.h>
#include <math.h>
#include <time.h>

int ifloor(float x)
{
    const int i = (int)x;
    return (x < 0.0f && x != i ? i - 1 : i);
}

int iceil(float x)
{
    const int i = (int)x;
    return (x > 0.0f && x != i ? i + 1 : i);
}

int main(void) {
  float x = 123456.789f;
  clock_t s = clock();
  for (int i = 0; i < 1000000000; ++i) {
    int v = (int)floorf(x);
  }
  clock_t e = clock();
  printf("%f\n", (float)(e - s) / (float)CLOCKS_PER_SEC);

  clock_t s1 = clock();
  for (int i = 0; i < 1000000000; ++i) {
    int v = ifloor(x);
  }
  clock_t e1 = clock();
  printf("%f\n", (float)(e1 - s1) / (float)CLOCKS_PER_SEC);

  printf("%d\n", (int)ceilf(x));
  printf("%d\n", iceil(x));

}