| /* Disable floating-point exceptions. |
| Copyright (C) 2004 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Aldy Hernandez <aldyh@redhat.com>, 2004. |
| |
| 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_libc.h" |
| #include <syscall.h> |
| #include <sys/prctl.h> |
| |
| int |
| fedisableexcept (int excepts) |
| { |
| unsigned int result = 0, pflags, r; |
| INTERNAL_SYSCALL_DECL (err); |
| |
| INTERNAL_SYSCALL (prctl, err, 2, PR_GET_FPEXC, &pflags); |
| |
| /* Save old enable bits. */ |
| if (pflags & PR_FP_EXC_OVF) |
| result |= FE_OVERFLOW; |
| if (pflags & PR_FP_EXC_UND) |
| result |= FE_UNDERFLOW; |
| if (pflags & PR_FP_EXC_INV) |
| result |= FE_INVALID; |
| if (pflags & PR_FP_EXC_DIV) |
| result |= FE_DIVBYZERO; |
| if (pflags & PR_FP_EXC_RES) |
| result |= FE_INEXACT; |
| |
| if (excepts & FE_INEXACT) |
| pflags &= ~PR_FP_EXC_RES; |
| if (excepts & FE_DIVBYZERO) |
| pflags &= ~PR_FP_EXC_DIV; |
| if (excepts & FE_UNDERFLOW) |
| pflags &= ~PR_FP_EXC_UND; |
| if (excepts & FE_OVERFLOW) |
| pflags &= ~PR_FP_EXC_OVF; |
| if (excepts & FE_INVALID) |
| pflags &= ~PR_FP_EXC_INV; |
| r = INTERNAL_SYSCALL (prctl, err, 2, PR_SET_FPEXC, pflags); |
| if (INTERNAL_SYSCALL_ERROR_P (r, err)) |
| return -1; |
| |
| return result; |
| } |