significandl

SIGNIFICAND(3)             Linux Programmer's Manual            SIGNIFICAND(3)

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  at-
       tributes(7).

       +----------------+---------------+---------+
       |Interface       | Attribute     | Value   |
       +----------------+---------------+---------+
       |significand(),  | Thread safety | MT-Safe |
       |significandf(), |               |         |
       |significandl()  |               |         |
       +----------------+---------------+---------+

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

SEE ALSO
       ilogb(3), scalb(3)

COLOPHON
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       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/.

GNU                               2017-09-15                    SIGNIFICAND(3)