1  /* Canonicalize floating-point representation.
       2     Copyright (C) 2016-2023 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  #include <math.h>
      20  
      21  int
      22  M_DECL_FUNC (__canonicalize) (FLOAT *cx, const FLOAT *x)
      23  {
      24    FLOAT val = *x;
      25    /* For all binary formats supported by glibc, iscanonical only fails
      26       if the representation is not a valid representation of the type,
      27       so the only work to do is for signaling NaNs.  */
      28    if (!iscanonical (val))
      29      return 1;
      30    if (issignaling (val))
      31      *cx = val + val;
      32    else
      33      *cx = val;
      34    return 0;
      35  }
      36  
      37  declare_mgen_alias (__canonicalize, canonicalize)