sysdeps/ieee754/ldbl-128ibm/s_getpayloadl.c

   1 /* Get NaN payload.  ldbl-128ibm version.
   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 <fix-int-fp-convert-zero.h>
  20 #include <math.h>
  21 #include <math_private.h>
  22 #include <stdint.h>
  23
  24 long double
  25 __getpayloadl (const long double *x)
  26 {
  27   double xhi = ldbl_high (*x);
  28   uint64_t ix;
  29   EXTRACT_WORDS64 (ix, xhi);
  30   if ((ix & 0x7ff0000000000000ULL) != 0x7ff0000000000000ULL
  31       || (ix & 0xfffffffffffffULL) == 0)
  32     return -1;
  33   ix &= 0x7ffffffffffffULL;
  34   if (FIX_INT_FP_CONVERT_ZERO && ix == 0)
  35     return 0.0L;
  36   return (long double) ix;
  37 }
  38 weak_alias (__getpayloadl, getpayloadl)