__signbitl

Name

__signbitl -- test sign of floating point value

Synopsis

#include <math.h>

int __signbitl(long double arg);

Description

__signbitl() has the same specification as signbit() in POSIX 1003.1-2008 (ISO/IEC 9945-2009), except that the argument type for __signbitl() is known to be long double.

__signbitl() is not in the source standard; it is only in the binary standard.