sysdeps/unix/sysv/linux/powerpc/powerpc64/fpu/fe_nomask.c

   1 /* Procedure definition for FE_NOMASK_ENV for Linux/ppc64.
   2    Copyright (C) 2003, 2006, 2008 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <fenv_libc.h>
  21 #include <errno.h>
  22 #include <sysdep.h>
  23 #include <sys/syscall.h>
  24 #include <sys/prctl.h>
  25 #include <kernel-features.h>
  26
  27 const fenv_t *
  28 __fe_nomask_env (void)
  29 {
  30 #if defined PR_SET_FPEXC && defined PR_FP_EXC_PRECISE
  31   int result;
  32   INTERNAL_SYSCALL_DECL (err);
  33   result = INTERNAL_SYSCALL (prctl, err, 2, PR_SET_FPEXC, PR_FP_EXC_PRECISE);
  34 # ifndef __ASSUME_NEW_PRCTL_SYSCALL
  35   if (INTERNAL_SYSCALL_ERROR_P (result, err)
  36       && INTERNAL_SYSCALL_ERRNO (result, err) == EINVAL)
  37     __set_errno (ENOSYS);
  38 # endif
  39 #else
  40   __set_errno (ENOSYS);
  41 #endif
  42   return FE_ENABLED_ENV;
  43 }
  44 libm_hidden_def (__fe_nomask_env)