1 /* Enable floating-point exceptions. 2 Copyright (C) 2000-2022 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 <fenv.h> 20 #include <fenv_libc.h> 21 #include <fpu_control.h> 22 23 int feenableexcept(int excepts)24feenableexcept (int excepts) 25 { 26 unsigned int new_exc, old_exc; 27 28 /* Get the current control word. */ 29 _FPU_GETCW (new_exc); 30 31 old_exc = (new_exc & ENABLE_MASK) >> ENABLE_SHIFT; 32 33 excepts &= FE_ALL_EXCEPT; 34 35 new_exc |= excepts << ENABLE_SHIFT; 36 _FPU_SETCW (new_exc); 37 38 return old_exc; 39 } 40