tests/test-truncf1.c

   1 /* Test of rounding towards zero.
   2    Copyright (C) 2007-2020 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 of the License, or
   7    (at your option) 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, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
  18
  19 #include <config.h>
  20
  21 #include <math.h>
  22
  23 #include "signature.h"
  24 SIGNATURE_CHECK (truncf, float, (float));
  25
  26 #include "isnanf-nolibm.h"
  27 #include "minus-zero.h"
  28 #include "infinity.h"
  29 #include "nan.h"
  30 #include "macros.h"
  31
  32 int
  33 main ()
  34 {
  35   /* Zero.  */
  36   ASSERT (truncf (0.0f) == 0.0f);
  37   ASSERT (truncf (minus_zerof) == 0.0f);
  38   /* Positive numbers.  */
  39   ASSERT (truncf (0.3f) == 0.0f);
  40   ASSERT (truncf (0.7f) == 0.0f);
  41   ASSERT (truncf (1.0f) == 1.0f);
  42   ASSERT (truncf (1.5f) == 1.0f);
  43   ASSERT (truncf (1.999f) == 1.0f);
  44   ASSERT (truncf (2.0f) == 2.0f);
  45   ASSERT (truncf (65535.99f) == 65535.0f);
  46   ASSERT (truncf (65536.0f) == 65536.0f);
  47   ASSERT (truncf (2.341e31f) == 2.341e31f);
  48   /* Negative numbers.  */
  49   ASSERT (truncf (-0.3f) == 0.0f);
  50   ASSERT (truncf (-0.7f) == 0.0f);
  51   ASSERT (truncf (-1.0f) == -1.0f);
  52   ASSERT (truncf (-1.5f) == -1.0f);
  53   ASSERT (truncf (-1.999f) == -1.0f);
  54   ASSERT (truncf (-2.0f) == -2.0f);
  55   ASSERT (truncf (-65535.99f) == -65535.0f);
  56   ASSERT (truncf (-65536.0f) == -65536.0f);
  57   ASSERT (truncf (-2.341e31f) == -2.341e31f);
  58   /* Infinite numbers.  */
  59   ASSERT (truncf (Infinityf ()) == Infinityf ());
  60   ASSERT (truncf (- Infinityf ()) == - Infinityf ());
  61   /* NaNs.  */
  62   ASSERT (isnanf (truncf (NaNf ())));
  63
  64   return 0;
  65 }