man3/significand.3

   1 .\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
   2 .\" Distributed under GPL
   3 .\" based on glibc infopages
   4 .TH SIGNIFICAND 3 2002-08-10 "GNU" "Linux Programmer's Manual"
   5 .SH NAME
   6 significand, significandf, significandl \-
   7 get mantissa of floating point number
   8 .SH SYNOPSIS
   9 .B #include <math.h>
  10 .sp
  11 .BI "double significand(double " x );
  12 .br
  13 .BI "float significandf(float " x );
  14 .br
  15 .BI "long double significandl(long double " x );
  16 .sp
  17 Link with \-lm.
  18 .SH DESCRIPTION
  19 The
  20 .BR significand ()
  21 function returns the mantissa of
  22 .I x
  23 scaled to the range [1,2).
  24 It is equivalent to
  25 .sp
  26 .in +8
  27 scalb(x, (double) \-ilogb(x))
  28 .in -8
  29 .PP
  30 This function exists mainly for use in certain standardized tests
  31 for IEEE 754 conformance.
  32 .SH HISTORY
  33 This function came from BSD.
  34 .SH "SEE ALSO"
  35 .BR ilogb (3),
  36 .BR scalb (3)