1 /* Disable 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 fedisableexcept(int excepts)22fedisableexcept (int excepts) 23 { 24 fenv_union_t fe, curr; 25 int result, new; 26 27 /* Get current exception mask to return. */ 28 fe.fenv = curr.fenv = fegetenv_control (); 29 result = fenv_reg_to_exceptions (fe.l); 30 31 if ((excepts & FE_ALL_INVALID) == FE_ALL_INVALID) 32 excepts = (excepts | FE_INVALID) & ~ FE_ALL_INVALID; 33 34 new = fenv_exceptions_to_reg (excepts); 35 36 if (fenv_reg_to_exceptions (new) != excepts) 37 return -1; 38 39 /* Sets the new exception mask. */ 40 fe.l &= ~new; 41 42 if (fe.l != curr.l) 43 fesetenv_control (fe.fenv); 44 45 __TEST_AND_ENTER_NON_STOP (-1ULL, fe.l); 46 47 return result; 48 } 49