release/src-rt-6.x.4708/linux/linux-2.6.36/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  * http://www.algor.co.uk
   8  *
   9  * ########################################################################
  10  *
  11  *  This program is free software; you can distribute it and/or modify it
  12  *  under the terms of the GNU General Public License (Version 2) as
  13  *  published by the Free Software Foundation.
  14  *
  15  *  This program is distributed in the hope it will be useful, but WITHOUT
  16  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  17  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  18  *  for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License along
  21  *  with this program; if not, write to the Free Software Foundation, Inc.,
  22  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  23  *
  24  * ########################################################################
  25  */
  26
  27
  28 #include "ieee754.h"
  29
  30 ieee754dp ieee754dp_floor(ieee754dp x)
  31 {
  32         ieee754dp i;
  33
  34         if (ieee754dp_lt(ieee754dp_modf(x, &i), ieee754dp_zero(0)))
  35                 return ieee754dp_sub(i, ieee754dp_one(0));
  36         else
  37                 return i;
  38 }
  39
  40 ieee754dp ieee754dp_ceil(ieee754dp x)
  41 {
  42         ieee754dp i;
  43
  44         if (ieee754dp_gt(ieee754dp_modf(x, &i), ieee754dp_zero(0)))
  45                 return ieee754dp_add(i, ieee754dp_one(0));
  46         else
  47                 return i;
  48 }
  49
  50 ieee754dp ieee754dp_trunc(ieee754dp x)
  51 {
  52         ieee754dp i;
  53
  54         (void) ieee754dp_modf(x, &i);
  55         return i;
  56 }