| 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 |
| 22 | fedisableexcept (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 (l: 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 (l: 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 |