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
  29 ieee754dp 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
  39 ieee754dp 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
  49 ieee754dp ieee754dp_trunc(ieee754dp x)
  50 {
  51         ieee754dp i;
  52
  53         (void) ieee754dp_modf(x, &i);
  54         return i;
  55 }