NAME
ldexp, ldexpf,
ldexpl —
multiply floating-point number by
integral power of 2
SYNOPSIS
#include
<math.h>
double
ldexp(double
x, int exp);
float
ldexpf(float
x, int exp);
long double
ldexpl(long
double x, int
exp);
DESCRIPTION
The
ldexp()
function multiplies a floating-point number by an integral power of 2. The
ldexpf()
function is a single precision version of ldexp().
The
ldexpl()
function is an extended precision version of
ldexp().
RETURN VALUES
The ldexp(),
ldexpf() and ldexpl()
functions return the value of x times 2 raised to the
power exp.
If the resultant value would cause an overflow, the global
variable errno is set to
ERANGE and the value HUGE is
returned.
SEE ALSO
STANDARDS
The ldexp() function conforms to
ANSI X3.159-1989
(“ANSI C89”).