| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Store current floating-point environment. |
| 2 | Copyright (C) 1997,1999,2000,2001,2003 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. |
| 5 | |
| 6 | The GNU C Library is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either |
| 9 | version 2.1 of the License, or (at your option) any later version. |
| 10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | Lesser General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, write to the Free |
| 18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 19 | 02111-1307 USA. */ |
| 20 | |
| 21 | #include <fenv.h> |
| 22 | |
| 23 | int |
| 24 | fegetenv (fenv_t *envp) |
| 25 | { |
| 26 | __asm__ ("fnstenv %0" : "=m" (*envp)); |
| 27 | /* And load it right back since the processor changes the mask. |
| 28 | Intel thought this opcode to be used in interrupt handlers which |
| 29 | would block all exceptions. */ |
| 30 | __asm__ ("fldenv %0" : : "m" (*envp)); |
| 31 | |
| 32 | /* Success. */ |
| 33 | return 0; |
| 34 | } |