1/* Return classification value corresponding to argument. 2 Copyright (C) 1997, 2000, 2002 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 26int 27__fpclassifyl (long double x) 28{ 29 u_int32_t ex, hx, lx; 30 int retval = FP_NORMAL; 31 32 GET_LDOUBLE_WORDS (ex, hx, lx, x); 33 ex &= 0x7fff; 34 if ((ex | lx | hx) == 0) 35 retval = FP_ZERO; 36 else if (ex == 0 && (hx & 0x80000000) == 0) 37 retval = FP_SUBNORMAL; 38 else if (ex == 0x7fff) 39 retval = ((hx & 0x7fffffff) | lx) != 0 ? FP_NAN : FP_INFINITE; 40 41 return retval; 42} 43libm_hidden_def (__fpclassifyl) 44