significand(3M)

NAME

significand(), significandf(), significandl(), significandw(), significandq() — normalized significand functions

SYNOPSIS

#include <math.h>

double significand(double x);

float significandf(float x);

long double significandl(long double x);

extended significandw(extended x);

quad significandq(quad x);

DESCRIPTION

The significand() functions compute the significand of a floating point value x, where:

x = significand * 2^exponent and 1 <= significand < 2

Thus, if x is subnormal, it is treated as though it were normalized before the significand is determined.

significandf() is a float version of significand(); it takes a float argument and returns a float result.

significandl() is a long double version of significand(); it takes a long double argument and returns a long double result.

significandw() is an extended version of significand(); it takes an extended argument and returns an extended result.

significandq() is equivalent to significandl() on HP-UX systems.

USAGE

To use these functions, compile either with the default -Ae option or with the -Aa and -D_HPUX_SOURCE options.

To use significandw() or significandq(), compile also with -fpwidetypes.

Make sure your program includes <math.h>. Link in the math library by specifying -lm on the compiler or linker command line. For more information, see the HP-UX floating-point guide for HP Integrity servers at the following site: http://www.hp.com/go/fp.

RETURN VALUE

Upon successful completion, significand() returns the normalized significand of x.

If x is zero, infinite, or NaN, significand() returns x.

ERRORS

No errors are defined.

STANDARDS CONFORMANCE

These functions are not specified by any standard.

significand(3M)

Technical documentation

» Table of Contents

» Index