Test rint impact for sNaN and qNaNs

test_snan_rint.cc

#include <cstdio>
#include <cmath>
#include <limits>
#include <ctime>
#define __STDC_WANT_IEC_60559_BFP_EXT__

using namespace std;

double qnan, snan, result;

int main(void) {
  // Keep it from being propagated
  if (clock() / CLOCKS_PER_SEC < 0xFFFFFF00) {
    qnan = numeric_limits<double>::quiet_NaN();
    snan = numeric_limits<double>::signaling_NaN();
  }
  result = rint(snan);
  printf("%lX %lX %lX\n", qnan, snan, result);
  printf("%d %d %d\n", issignaling(qnan), issignaling(snan), issignaling(result));
  return 0;
}