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