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_libc.h> 20 21 int feenableexcept(int excepts)22feenableexcept (int excepts) 23 { 24 unsigned long int new_exc, old_exc; 25 26 new_exc = __ieee_get_fp_control (); 27 28 old_exc = (new_exc & SWCR_ENABLE_MASK) << SWCR_ENABLE_SHIFT; 29 new_exc |= (excepts >> SWCR_ENABLE_SHIFT) & SWCR_ENABLE_MASK; 30 31 __ieee_set_fp_control (new_exc); 32 33 return old_exc; 34 } 35