IEEE_TEST(3) BSD Programmer's Manual IEEE_TEST(3)NAME
logb, logbf, scalb, scalbf, significand, significandf - IEEE test func-
tions
LIBRARY
libm
SYNOPSIS
#include <math.h>
double
logb(double x);
float
logbf(float x);
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.
logb(x) returns x's exponent n, a signed integer converted to
double-precision floating-point. logb(+-Infinity) = +Infinity; logb(0) =
-Infinity with a division by zero exception.
scalbn(x, n) returns x*(2**n) computed by exponent manipulation.
significand(x) returns sig, where x := sig * 2**n with 1 <= sig < 2.
significand(x) is not defined when x is 0, +-Infinity, or NaN.
SEE ALSOieee(3), math(3)STANDARDS
IEEE Std 754-1985
MirOS BSD #10-current March 10, 1994 1