| /* Clear given exceptions in current floating-point environment. |
| Copyright (C) 2001-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <fenv.h> |
| |
| int |
| feclearexcept (int excepts) |
| { |
| fenv_t temp; |
| unsigned int mxcsr; |
| |
| /* Mask out unsupported bits/exceptions. */ |
| excepts &= FE_ALL_EXCEPT; |
| |
| /* Bah, we have to clear selected exceptions. Since there is no |
| `fldsw' instruction we have to do it the hard way. */ |
| __asm__ ("fnstenv %0" : "=m" (*&temp)); |
| |
| /* Clear the relevant bits. */ |
| temp.__status_word &= excepts ^ FE_ALL_EXCEPT; |
| |
| /* Put the new data in effect. */ |
| __asm__ ("fldenv %0" : : "m" (*&temp)); |
| |
| /* And the same procedure for SSE. */ |
| __asm__ ("stmxcsr %0" : "=m" (*&mxcsr)); |
| |
| /* Clear the relevant bits. */ |
| mxcsr &= ~excepts; |
| |
| /* And put them into effect. */ |
| __asm__ ("ldmxcsr %0" : : "m" (*&mxcsr)); |
| |
| /* Success. */ |
| return 0; |
| } |
| libm_hidden_def (feclearexcept) |
