1  /* NaN payload handling for float.
       2     Copyright (C) 1997-2023 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  #define SET_NAN_PAYLOAD(flt, mant)		\
      20    do						\
      21      {						\
      22        union ieee754_float u;			\
      23        u.f = (flt);				\
      24        u.ieee_nan.mantissa = (mant);		\
      25        if (u.ieee.mantissa != 0)			\
      26  	(flt) = u.f;				\
      27      }						\
      28    while (0)