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, , or an , 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, , or .
SEE ALSO
STANDARDS
IEEE Std 754-1985