__fpclassifyl
extern int __fpclassifyl(long double value);
: __fpclassifyl(value))
extern int __fpclassifyl(long double value);
return __fpclassifyl(value) > FP_INFINITE;
return __fpclassifyl(value) == FP_NAN;
return __fpclassifyl(value) == FP_INFINITE;