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, see 18 <http://www.gnu.org/licenses/>. */ 19 20 #include <math.h> 21 #include "math_private.h" 22 __fpclassifyf(float x)23int __fpclassifyf (float x) 24 { 25 u_int32_t wx; 26 int retval = FP_NORMAL; 27 28 GET_FLOAT_WORD (wx, x); 29 wx &= 0x7fffffff; 30 if (wx == 0) 31 retval = FP_ZERO; 32 else if (wx < 0x800000) 33 retval = FP_SUBNORMAL; 34 else if (wx >= 0x7f800000) 35 retval = wx > 0x7f800000 ? FP_NAN : FP_INFINITE; 36 37 return retval; 38 } 39 libm_hidden_def(__fpclassifyf) 40