| /* Disable floating-point exceptions. e500 version. |
| Copyright (C) 2004-2014 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_libc.h> |
| #include <sysdep.h> |
| #include <sys/prctl.h> |
| |
| int |
| fedisableexcept (int excepts) |
| { |
| int result = 0, pflags, r; |
| INTERNAL_SYSCALL_DECL (err); |
| |
| r = INTERNAL_SYSCALL (prctl, err, 2, PR_GET_FPEXC, &pflags); |
| if (INTERNAL_SYSCALL_ERROR_P (r, err)) |
| return -1; |
| |
| /* Save old enable bits. */ |
| result = __fexcepts_from_prctl (pflags); |
| |
| pflags &= ~__fexcepts_to_prctl (excepts); |
| r = INTERNAL_SYSCALL (prctl, err, 2, PR_SET_FPEXC, |
| pflags | PR_FP_EXC_SW_ENABLE); |
| if (INTERNAL_SYSCALL_ERROR_P (r, err)) |
| return -1; |
| |
| /* If disabling signals for "inexact", also disable trapping to the |
| kernel. */ |
| if ((excepts & FE_INEXACT) != 0) |
| { |
| unsigned long fpescr; |
| |
| fpescr = fegetenv_register (); |
| fpescr &= ~SPEFSCR_FINXE; |
| fesetenv_register (fpescr); |
| } |
| |
| return result; |
| } |
