| /* Store current floating-point environment and clear exceptions. |
| Copyright (C) 2001, 2005, 2007 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <fenv.h> |
| |
| int |
| feholdexcept (fenv_t *envp) |
| { |
| unsigned int mxcsr; |
| fenv_t temp; |
| |
| /* Store the environment. */ |
| __asm__ ("fnstenv %0\n" |
| "stmxcsr %1" : "=m" (temp), "=m" (temp.__mxcsr)); |
| *envp = temp; |
| |
| /* Now set all exceptions to non-stop, first the x87 FPU. */ |
| temp.__control_word |= 0x3f; |
| |
| /* And clear all exceptions. */ |
| temp.__status_word &= ~0x3f; |
| |
| __asm__ ("fldenv %0" : : "m" (temp)); |
| |
| /* Set the SSE MXCSR register. */ |
| mxcsr = (envp->__mxcsr | 0x1f80) & ~0x3f; |
| __asm__ ("ldmxcsr %0" : : "m" (*&mxcsr)); |
| |
| return 0; |
| } |
| libm_hidden_def (feholdexcept) |
