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GNU
2017-09-15
Aliases: significandf(3), significandf(3), significandf(3), significandf(3), significandf(3), significandf(3), significandl(3), significandl(3), significandl(3), significandl(3), significandl(3), significandl(3)

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Manual pages about using GNU/Linux for development

man-pages

Linux kernel and C library user-space interface documentation

NAME

significand, significandf, significandl - get mantissa of floating-point number

SYNOPSIS

#include <math.h>
double significand(double x);
float significandf(float x);
long double significandl(long double x);
Link with -lm.
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
significand(), significandf(), significandl():
/* Since glibc 2.19: */ _DEFAULT_SOURCE
|| /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

DESCRIPTION

These functions return the mantissa of x scaled to the range [1,2). They are equivalent to
scalb(x, (double) -ilogb(x))
This function exists mainly for use in certain standardized tests for IEEE 754 conformance.

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).
Interface Attribute Value


Thread safety MT-Safe

CONFORMING TO

These functions are nonstandard; the double version is available on a number of other systems.

COLOPHON

This page is part of release 5.00 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

REFERENCED BY

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