zircon/third_party/ulib/musl/src/math/nearbyint.c

#include <fenv.h>
#include <math.h>

#include "libm.h"

/* nearbyint is the same as rint, but it must not raise the inexact exception */

double nearbyint(double x) {
#ifdef FE_INEXACT
  PRAGMA_STDC_FENV_ACCESS_ON
  int e;

  e = fetestexcept(FE_INEXACT);
#endif
  x = rint(x);
#ifdef FE_INEXACT
  if (!e)
    feclearexcept(FE_INEXACT);
#endif
  return x;
}