LDEXP(3)                NetBSD Library Functions Manual               LDEXP(3)

NAME
     ldexp -- multiply floating-point number by integral power of 2

LIBRARY
     Math Library (libm, -lm)

SYNOPSIS
     #include <math.h>

     double
     ldexp(double x, int exp);

     float
     ldexpf(float x, int exp);

DESCRIPTION
     The ldexp() function multiplies a floating-point number by an integral
     power of 2.

RETURN VALUES
     The ldexp() function returns the value of x times 2 raised to the power
     exp.

     If the input x is a NaN, infinity, or 0.0, it is returned unchanged.

     If the result would cause an overflow, the global variable errno is set
     to ERANGE and infinity is returned, with the same sign as x.

     If the result would cause underflow to 0.0, the global variable errno is
     set to ERANGE and the value 0.0 is returned.

SEE ALSO
     frexp(3), math(3), modf(3)

STANDARDS
     The ldexp() function conforms to ANSI X3.159-1989 (``ANSI C89'').

NetBSD 5.0_STABLE               March 21, 2006               NetBSD 5.0_STABLE
