1  /* Set current rounding direction.
       2     Copyright (C) 1999-2023 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, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <fenv.h>
      20  
      21  int
      22  __fesetround (int round)
      23  {
      24    fenv_t fpsr;
      25  
      26    if (round & ~3)
      27      return 1;
      28  
      29    /* Get the current state.  */
      30    __asm__ __volatile__ ("mov.m %0=ar.fpsr" : "=r" (fpsr));
      31  
      32    /* Set the relevant bits.  */
      33    fpsr = (fpsr & ~(3UL << 10)) | ((fenv_t) round << 10);
      34  
      35    /* Put the new state in effect.  */
      36    __asm__ __volatile__ ("mov.m ar.fpsr=%0" :: "r" (fpsr) : "memory");
      37  
      38    return 0;
      39  }
      40  libm_hidden_def (__fesetround)
      41  weak_alias (__fesetround, fesetround)
      42  libm_hidden_weak (fesetround)