sysdeps/alpha/fpu/fegetround.c

   1 /* Return current rounding direction.
   2    Copyright (C) 1997, 2000 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Richard Henderson <rth@tamu.edu>, 1997
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Library General Public License as
   8    published by the Free Software Foundation; either version 2 of the
   9    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    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include <fenv_libc.h>
  22
  23 int
  24 fegetround (void)
  25 {
  26   unsigned long fpcr;
  27
  28   __asm__ __volatile__("excb; mf_fpcr %0" : "=f"(fpcr));
  29
  30   return (fpcr >> FPCR_ROUND_SHIFT) & 3;
  31 }