uclibc-ng/libm/sparc/fesetround.c

/* Set current rounding direction.
   Copyright (C) 1997-2025 Free Software Foundation, Inc.

   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
   <https://www.gnu.org/licenses/>.  */

#include <fenv.h>
#include "fenv_private.h"

int
fesetround (int round)
{
  fenv_t tmp;

  if ((round & ~__FE_ROUND_MASK) != 0)
    /* ROUND is no valid rounding mode.  */
    return 1;

  __fenv_stfsr (tmp);
  tmp &= ~__FE_ROUND_MASK;
  tmp |= round;
  __fenv_ldfsr (tmp);

  return 0;
}