sysdeps/mips/fpu/fesetround.c

   1 /* Set current rounding direction.
   2    Copyright (C) 1998-2023 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 #include <fpu_control.h>
  21
  22 int
  23 __fesetround (int round)
  24 {
  25   fpu_control_t cw;
  26
  27   if ((round & ~_FPU_RC_MASK) != 0)
  28     /* ROUND is no valid rounding mode.  */
  29     return 1;
  30
  31   /* Get current state.  */
  32   _FPU_GETCW (cw);
  33
  34   /* Set rounding bits.  */
  35   cw &= ~_FPU_RC_MASK;
  36   cw |= round;
  37   /* Set new state.  */
  38   _FPU_SETCW (cw);
  39
  40   return 0;
  41 }
  42
  43 libm_hidden_def (__fesetround)
  44 weak_alias (__fesetround, fesetround)
  45 libm_hidden_weak (fesetround)