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FreeBSD 11.0 - man page for ieee_test (freebsd section 3)

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 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
BSD
November 6, 2005 BSD

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