1 /* Return classification value corresponding to argument. 2 Copyright (C) 1997-2021 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 <math.h> 20 21 #include <math_private.h> 22 23 24 int __fpclassifyf(float x)25__fpclassifyf (float x) 26 { 27 uint32_t wx; 28 int retval = FP_NORMAL; 29 30 GET_FLOAT_WORD (wx, x); 31 wx &= 0x7fffffff; 32 if (wx == 0) 33 retval = FP_ZERO; 34 else if (wx < 0x800000) 35 retval = FP_SUBNORMAL; 36 else if (wx >= 0x7f800000) 37 retval = wx > 0x7f800000 ? FP_NAN : FP_INFINITE; 38 39 return retval; 40 } 41 libm_hidden_def (__fpclassifyf) 42