uclibc-ng/libm/arm/fegetround.c

/* Return current rounding direction.
   Copyright (C) 2004-2025 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 "arm-features.h"
#include <fenv.h>
#include <fpu_control.h>

/* Return the floating-point rounding mode.  */

static inline int
get_rounding_mode (void)
{
  fpu_control_t fpscr;

  /* FE_TONEAREST is the only supported rounding mode
     if a VFP unit isn't present.  */
  if (!ARM_HAVE_VFP)
    return FE_TONEAREST;

  _FPU_GETCW (fpscr);
  return fpscr & _FPU_MASK_RM;
}

int
fegetround (void)
{
  return get_rounding_mode ();
}