IEEE_TEST(3) BSD Library Functions Manual IEEE_TEST(3)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 manipu‐
lation. If n is not an integer, ±∞, or an NaN, the result is unspeci‐
fied.
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 NaN.
SEE ALSOieee(3), math(3)STANDARDS
IEEE Std 754-1985
BSD November 6, 2005 BSD