sysdeps/hppa/hppa1.1/s_signbit.c

   1 /* Return nonzero value if number is negative.
   2    Copyright (C) 1997, 2009 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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <math.h>
  22
  23 #include "math_private.h"
  24
  25 int
  26 __signbit (double x)
  27 {
  28   int32_t hx;
  29
  30   GET_HIGH_WORD (hx, x);
  31   return hx & 0x80000000;
  32 }
  33 #ifdef NO_LONG_DOUBLE
  34 strong_alias (__signbit, __signbitl)
  35 #endif