#ifdef HAVE_SIGNBIT
#define mono_signbit signbit
#else
#define mono_signbit(x) (sizeof (x) == sizeof (float) ? mono_signbit_float (x) : mono_signbit_double (x))
#ifdef HAVE_SIGNBIT
#define mono_signbit signbit
#else
#define mono_signbit(x) (sizeof (x) == sizeof (float) ? mono_signbit_float (x) : mono_signbit_double (x))