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

   1 /* Return nonzero value if number is negative.
   2    Copyright (C) 1997-2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <math.h>
  21 #include <math_private.h>
  22 #include <math_ldbl_opt.h>
  23
  24 int
  25 ___signbitl (long double x)
  26 {
  27   int64_t e;
  28   double xhi;
  29
  30   xhi = ldbl_high (x);
  31   EXTRACT_WORDS64 (e, xhi);
  32   return e < 0;
  33 }
  34 #ifdef IS_IN_libm
  35 long_double_symbol (libm, ___signbitl, __signbitl);
  36 #else
  37 long_double_symbol (libc, ___signbitl, __signbitl);
  38 #endif