/* Set current rounding direction.

   Copyright (C) 2000-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by David Huggins-Daines <dhd@debian.org>, 2000

   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.h>

int

__fesetround (int round)

{

  union { unsigned long long l; unsigned int sw[2]; } s;

  if (round & ~FE_DOWNWARD)

    /* round is not a valid rounding mode. */

    return 1;

  /* Get the current status word. */

  __asm__ ("fstd %%fr0,0(%1)" : "=m" (s.l) : "r" (&s.l) : "%r0");

  s.sw[0] &= ~FE_DOWNWARD;

  s.sw[0] |= round & FE_DOWNWARD;

  __asm__ ("fldd 0(%0),%%fr0" : : "r" (&s.l), "m" (s.l) : "%r0");

  return 0;

}

libm_hidden_def (__fesetround)

weak_alias (__fesetround, fesetround)

libm_hidden_weak (fesetround)