/* Set floating-point environment exception handling.

   Copyright (C) 1997-2018 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>

int

__fesetexceptflag (const fexcept_t *flagp, int excepts)

{

  fenv_union_t u, n;

  fexcept_t flag;

  /* Get the current state.  */

  u.fenv = fegetenv_register ();

  /* Ignore exceptions not listed in 'excepts'.  */

  flag = *flagp & excepts;

  /* Replace the exception status */

  int excepts_mask = FPSCR_STICKY_BITS & excepts;

  if ((excepts & FE_INVALID) != 0)

    excepts_mask |= FE_ALL_INVALID;

  n.l = ((u.l & ~excepts_mask)

	 | (flag & FPSCR_STICKY_BITS)

	 /* Turn FE_INVALID into FE_INVALID_SOFTWARE.  */

	 | (flag >> ((31 - FPSCR_VX) - (31 - FPSCR_VXSOFT))

	    & FE_INVALID_SOFTWARE));

  /* Store the new status word (along with the rest of the environment).

     This may cause floating-point exceptions if the restored state

     requests it.  */

  if (n.l != u.l)

    fesetenv_register (n.fenv);

  /* Deal with FE_INVALID_SOFTWARE not being implemented on some chips.  */

  if (flag & FE_INVALID)

    feraiseexcept(FE_INVALID);

  /* Success.  */

  return 0;

}

#include <shlib-compat.h>

#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)

strong_alias (__fesetexceptflag, __old_fesetexceptflag)

compat_symbol (libm, __old_fesetexceptflag, fesetexceptflag, GLIBC_2_1);

#endif

versioned_symbol (libm, __fesetexceptflag, fesetexceptflag, GLIBC_2_2);