NAME

scalb, scalbf, significand, significandf — IEEE test functions

LIBRARY

Math Library (libm, -lm)

SYNOPSIS

#include < math.h>

double
scalb( double x, double n);

float
scalbf( float x, float n);

double
significand( double x);

float
significandf( float x);

DESCRIPTION

These functions allow users to test conformance to IEEE Std 754-1985. Their use is not otherwise recommended.

scalb( x, n) and scalbf( x, n) return x∗(2** n) computed by exponent manipulation. If n is not an integer, ±infinity, or an NaN, the result is unspecified.

significand( x) and significandf( x) return sig, where x := sig ∗ 2** n with 1 ≤ sig < 2. significand( x) and significandf( x) are not defined when x is 0, ±infinity, or NaN.

SEE ALSO

ieee(3), math(3)

STANDARDS

IEEE Std 754-1985