| /* Disable floating-point exceptions. |
| Copyright (C) 1999-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Andreas Jaeger <aj@suse.de>, 1999. |
| |
| 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> |
| #include <unistd.h> |
| #include <ldsodefs.h> |
| #include <dl-procinfo.h> |
| |
| int |
| fedisableexcept (int excepts) |
| { |
| unsigned short int new_exc, old_exc; |
| |
| /* Get the current control word. */ |
| __asm__ ("fstcw %0" : "=m" (*&new_exc)); |
| |
| old_exc = (~new_exc) & FE_ALL_EXCEPT; |
| |
| excepts &= FE_ALL_EXCEPT; |
| |
| new_exc |= excepts; |
| __asm__ ("fldcw %0" : : "m" (*&new_exc)); |
| |
| /* If the CPU supports SSE we set the MXCSR as well. */ |
| if ((GLRO(dl_hwcap) & HWCAP_I386_XMM) != 0) |
| { |
| unsigned int xnew_exc; |
| |
| /* Get the current control word. */ |
| __asm__ ("stmxcsr %0" : "=m" (*&xnew_exc)); |
| |
| xnew_exc |= excepts << 7; |
| |
| __asm__ ("ldmxcsr %0" : : "m" (*&xnew_exc)); |
| } |
| |
| return old_exc; |
| } |