| /* Clear floating-point exceptions for atomic compound assignment. |
| 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 <stdlib.h> |
| #include <sysdep.h> |
| #include <sys/prctl.h> |
| |
| void |
| __atomic_feclearexcept (void) |
| { |
| unsigned int fpescr, old_fpescr; |
| |
| /* Get the current state. */ |
| old_fpescr = fpescr = fegetenv_register (); |
| |
| /* Clear the relevant bits. */ |
| fpescr &= ~SPEFSCR_ALL_EXCEPT; |
| |
| /* Put the new state in effect. */ |
| fesetenv_register (fpescr); |
| |
| /* Let the kernel know if the "invalid" or "underflow" bit was |
| cleared. */ |
| if (old_fpescr & (SPEFSCR_FINVS | SPEFSCR_FUNFS)) |
| { |
| int pflags __attribute__ ((__unused__)), r; |
| INTERNAL_SYSCALL_DECL (err); |
| |
| r = INTERNAL_SYSCALL (prctl, err, 2, PR_GET_FPEXC, &pflags); |
| if (INTERNAL_SYSCALL_ERROR_P (r, err)) |
| abort (); |
| } |
| } |
