tests/test-floor1.c

   1 /* Test of rounding towards negative infinity.
   2    Copyright (C) 2007-2024 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 (floor, double, (double));
  25
  26 #include "isnand-nolibm.h"
  27 #include "minus-zero.h"
  28 #include "infinity.h"
  29 #include "nan.h"
  30 #include "macros.h"
  31
  32 int
  33 main (int argc, _GL_UNUSED char **argv)
  34 {
  35   /* Zero.  */
  36   ASSERT (floor (0.0) == 0.0);
  37   ASSERT (floor (minus_zerod) == 0.0);
  38   /* Positive numbers.  */
  39   ASSERT (floor (0.3) == 0.0);
  40   ASSERT (floor (0.7) == 0.0);
  41   ASSERT (floor (1.0) == 1.0);
  42   ASSERT (floor (1.5) == 1.0);
  43   ASSERT (floor (1.999) == 1.0);
  44   ASSERT (floor (2.0) == 2.0);
  45   ASSERT (floor (65535.999) == 65535.0);
  46   ASSERT (floor (65536.0) == 65536.0);
  47   ASSERT (floor (2.341e31) == 2.341e31);
  48   /* Negative numbers.  */
  49   ASSERT (floor (-0.3) == -1.0);
  50   ASSERT (floor (-0.7) == -1.0);
  51   ASSERT (floor (-1.0) == -1.0);
  52   ASSERT (floor (-1.001) == -2.0);
  53   ASSERT (floor (-1.5) == -2.0);
  54   ASSERT (floor (-1.999) == -2.0);
  55   ASSERT (floor (-2.0) == -2.0);
  56   ASSERT (floor (-65535.999) == -65536.0);
  57   ASSERT (floor (-65536.0) == -65536.0);
  58   ASSERT (floor (-2.341e31) == -2.341e31);
  59   /* Infinite numbers.  */
  60   ASSERT (floor (Infinityd ()) == Infinityd ());
  61   ASSERT (floor (- Infinityd ()) == - Infinityd ());
  62   /* NaNs.  */
  63   ASSERT (isnand (floor (NaNd ())));
  64
  65   return test_exit_status;
  66 }