1 /* fpclassify(). RISC-V version. 2 Copyright (C) 2017-2021 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 #include <fenv_private.h> 21 22 int __fpclassify(double x)23__fpclassify (double x) 24 { 25 int cls = _FCLASS (x); 26 if (__builtin_expect (cls & _FCLASS_NORM, _FCLASS_NORM)) 27 return FP_NORMAL; 28 if (__builtin_expect (cls & _FCLASS_ZERO, _FCLASS_ZERO)) 29 return FP_ZERO; 30 if (__builtin_expect (cls & _FCLASS_SUBNORM, _FCLASS_SUBNORM)) 31 return FP_SUBNORMAL; 32 if (__builtin_expect (cls & _FCLASS_INF, _FCLASS_INF)) 33 return FP_INFINITE; 34 return FP_NAN; 35 } 36 libm_hidden_def (__fpclassify) 37