tests/test-roundf1.c

   1 /* Test of rounding to nearest, breaking ties away from zero.
   2    Copyright (C) 2007-2011 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software Foundation,
  16    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  17
  18 /* Written by Ben Pfaff <blp@gnu.org>, 2007.
  19    Based heavily on Bruno Haible's test-truncf.c. */
  20
  21 #include <config.h>
  22
  23 #include <math.h>
  24
  25 #include "signature.h"
  26 SIGNATURE_CHECK (roundf, float, (float));
  27
  28 #include "isnanf-nolibm.h"
  29 #include "minus-zero.h"
  30 #include "nan.h"
  31 #include "macros.h"
  32
  33 int
  34 main ()
  35 {
  36   /* Zero.  */
  37   ASSERT (roundf (0.0f) == 0.0f);
  38   ASSERT (roundf (minus_zerof) == 0.0f);
  39   /* Positive numbers.  */
  40   ASSERT (roundf (0.3f) == 0.0f);
  41   ASSERT (roundf (0.5f) == 1.0f);
  42   ASSERT (roundf (0.7f) == 1.0f);
  43   ASSERT (roundf (1.0f) == 1.0f);
  44   ASSERT (roundf (1.5f) == 2.0f);
  45   ASSERT (roundf (2.5f) == 3.0f);
  46   ASSERT (roundf (1.999f) == 2.0f);
  47   ASSERT (roundf (2.0f) == 2.0f);
  48   ASSERT (roundf (65535.99f) == 65536.0f);
  49   ASSERT (roundf (65536.0f) == 65536.0f);
  50   ASSERT (roundf (65536.01f) == 65536.0f);
  51   ASSERT (roundf (2.341e31f) == 2.341e31f);
  52   /* Negative numbers.  */
  53   ASSERT (roundf (-0.3f) == 0.0f);
  54   ASSERT (roundf (-0.5f) == -1.0f);
  55   ASSERT (roundf (-0.7f) == -1.0f);
  56   ASSERT (roundf (-1.0f) == -1.0f);
  57   ASSERT (roundf (-1.5f) == -2.0f);
  58   ASSERT (roundf (-2.5f) == -3.0f);
  59   ASSERT (roundf (-1.999f) == -2.0f);
  60   ASSERT (roundf (-2.0f) == -2.0f);
  61   ASSERT (roundf (-65535.99f) == -65536.0f);
  62   ASSERT (roundf (-65536.0f) == -65536.0f);
  63   ASSERT (roundf (-65536.01f) == -65536.0f);
  64   ASSERT (roundf (-2.341e31f) == -2.341e31f);
  65   /* Infinite numbers.  */
  66   ASSERT (roundf (1.0 / 0.0f) == 1.0 / 0.0f);
  67   ASSERT (roundf (-1.0 / 0.0f) == -1.0 / 0.0f);
  68   /* NaNs.  */
  69   ASSERT (isnanf (roundf (NaNf ())));
  70
  71   return 0;
  72 }