LXR linux/arch/mips/math-emu/ieee754m.c

   1/*
   2 * floor, trunc, ceil
   3 */
   4/*
   5 * MIPS floating point support
   6 * Copyright (C) 1994-2000 Algorithmics Ltd.
   7 *
   8 * ########################################################################
   9 *
  10 *  This program is free software; you can distribute it and/or modify it
  11 *  under the terms of the GNU General Public License (Version 2) as
  12 *  published by the Free Software Foundation.
  13 *
  14 *  This program is distributed in the hope it will be useful, but WITHOUT
  15 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 *  for more details.
  18 *
  19 *  You should have received a copy of the GNU General Public License along
  20 *  with this program; if not, write to the Free Software Foundation, Inc.,
  21 *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22 *
  23 * ########################################################################
  24 */
  25
  26
  27#include "ieee754.h"
  28
  29ieee754dp ieee754dp_floor(ieee754dp x)
  30{
  31        ieee754dp i;
  32
  33        if (ieee754dp_lt(ieee754dp_modf(x, &i), ieee754dp_zero(0)))
  34                return ieee754dp_sub(i, ieee754dp_one(0));
  35        else
  36                return i;
  37}
  38
  39ieee754dp ieee754dp_ceil(ieee754dp x)
  40{
  41        ieee754dp i;
  42
  43        if (ieee754dp_gt(ieee754dp_modf(x, &i), ieee754dp_zero(0)))
  44                return ieee754dp_add(i, ieee754dp_one(0));
  45        else
  46                return i;
  47}
  48
  49ieee754dp ieee754dp_trunc(ieee754dp x)
  50{
  51        ieee754dp i;
  52
  53        (void) ieee754dp_modf(x, &i);
  54        return i;
  55}
  56