__fpclassifyf
extern int __fpclassifyf(float value);
(sizeof(value) == sizeof(float) ? __fpclassifyf(value) \
extern int __fpclassifyf(float value);
return __fpclassifyf(value) > FP_INFINITE;
return __fpclassifyf(value) == FP_NAN;
return __fpclassifyf(value) == FP_INFINITE;