sysdeps/s390/fpu/fesetround.c

   1 /* Set current rounding direction.
   2    Copyright (C) 2000-2019 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Denis Joseph Barrow (djbarrow@de.ibm.com).
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <fenv_libc.h>
  21 #include <fpu_control.h>
  22
  23 int
  24 __fesetround (int round)
  25 {
  26   if ((round|FPC_RM_MASK) != FPC_RM_MASK)
  27     {
  28       /* ROUND is not a valid rounding mode.  */
  29       return 1;
  30     }
  31   __asm__ __volatile__ ("srnm 0(%0)"
  32                         :
  33                         : "a" (round));
  34
  35   return 0;
  36 }
  37 libm_hidden_def (__fesetround)
  38 weak_alias (__fesetround, fesetround)
  39 libm_hidden_weak (fesetround)