NAME

scalbln, scalblnf, scalblnl, scalbn, scalbnf, scalbnl — adjust exponent

LIBRARY

Math Library (libm, -lm)

SYNOPSIS

#include <math.h>

double
scalbln(double x, long n);

float
scalblnf(float x, long n);

long double
scalblnl(long double x, long n);

double
scalbn(double x, int n);

float
scalbnf(float x, int n);

long double
scalbnl(long double x, int n);

DESCRIPTION

These routines return x∗(2**n) computed by exponent manipulation.

SEE ALSO

ieee(3), math(3)

STANDARDS

These routines conform to ISO/IEC 9899:1999 (“ISO C99”), and they implement the Scalb function recommended by IEEE Std 754-1985.

HISTORY

The scalbn() and scalbnf() functions appeared in 4.3BSD and FreeBSD 2.0, respectively. The scalbln() and scalblnf() functions first appeared in FreeBSD 5.3, and scalblnl() and scalbln() in FreeBSD 6.0.