Incorrect benchmark for airy/MAX/eq?

[Qi-Zhan]

The NAN in double may cause the inconsistency in the benchmark:

#include <math.h>
#include <stdio.h>
double snippet1(double a, double b) {
  if (b < a)  // change
    return a; // change
  else
    return b; // change
}

double snippet2(double a, double b) {
  if (b > a)
    return b;
  else
    return a;
}

int main() {
  double a = 1.25 * 256;
  double b = NAN; // 0x7fc00000
  double x = snippet1(a, b);
  double y = snippet2(a, b);
  printf("%f, %f\n", x, y);
  return 0;
}

It turns out that x = nan, y = 320.000000.

I suggest change the type from double to int.