math/s_significand_template.c

   1 /* Return the mantissa of a floating-point number.
   2    Copyright (C) 2018-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 /*
  20  * significand(x) computes just
  21  *      scalb(x, (FLOAT) - ilogb(x)),
  22  * for exercising the fraction-part(F) IEEE 754-1985 test vector.
  23  */
  24
  25 #include <math.h>
  26 #include <math_private.h>
  27
  28 FLOAT
  29 M_DECL_FUNC (__significand) (FLOAT x)
  30 {
  31   return M_SUF (__ieee754_scalb) (x,(FLOAT) - M_SUF (__ilogb) (x));
  32 }
  33 declare_mgen_alias (__significand, significand)