tests/test-roundl.c

   1 /* Test of rounding to nearest, breaking ties away from zero.
   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, 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, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Ben Pfaff <blp@gnu.org>, 2007.
  18    Based heavily on Bruno Haible's test-truncl.c. */
  19
  20 #include <config.h>
  21
  22 #include <math.h>
  23
  24 #include "signature.h"
  25 SIGNATURE_CHECK (roundl, long double, (long double));
  26
  27 #include <float.h>
  28
  29 #include "fpucw.h"
  30 #include "isnanl-nolibm.h"
  31 #include "minus-zero.h"
  32 #include "infinity.h"
  33 #include "nan.h"
  34 #include "macros.h"
  35
  36 int
  37 main ()
  38 {
  39   DECL_LONG_DOUBLE_ROUNDING
  40
  41   BEGIN_LONG_DOUBLE_ROUNDING ();
  42
  43   /* Zero.  */
  44   ASSERT (roundl (0.0L) == 0.0L);
  45   ASSERT (roundl (minus_zerol) == 0.0L);
  46   /* Positive numbers.  */
  47   ASSERT (roundl (0.3L) == 0.0L);
  48   ASSERT (roundl (0.5L) == 1.0L);
  49   ASSERT (roundl (0.7L) == 1.0L);
  50   ASSERT (roundl (1.0L) == 1.0L);
  51   ASSERT (roundl (1.5L) == 2.0L);
  52   ASSERT (roundl (2.5L) == 3.0L);
  53   ASSERT (roundl (1.999L) == 2.0L);
  54   ASSERT (roundl (2.0L) == 2.0L);
  55   ASSERT (roundl (65535.999L) == 65536.0L);
  56   ASSERT (roundl (65536.0L) == 65536.0L);
  57   ASSERT (roundl (65536.001L) == 65536.0L);
  58   ASSERT (roundl (2.341e31L) == 2.341e31L);
  59   /* Negative numbers.  */
  60   ASSERT (roundl (-0.3L) == 0.0L);
  61   ASSERT (roundl (-0.5L) == -1.0L);
  62   ASSERT (roundl (-0.7L) == -1.0L);
  63   ASSERT (roundl (-1.0L) == -1.0L);
  64   ASSERT (roundl (-1.5L) == -2.0L);
  65   ASSERT (roundl (-2.5L) == -3.0L);
  66   ASSERT (roundl (-1.999L) == -2.0L);
  67   ASSERT (roundl (-2.0L) == -2.0L);
  68   ASSERT (roundl (-65535.999L) == -65536.0L);
  69   ASSERT (roundl (-65536.0L) == -65536.0L);
  70   ASSERT (roundl (-65536.001L) == -65536.0L);
  71   ASSERT (roundl (-2.341e31L) == -2.341e31L);
  72   /* Infinite numbers.  */
  73   ASSERT (roundl (Infinityl ()) == Infinityl ());
  74   ASSERT (roundl (- Infinityl ()) == - Infinityl ());
  75   /* NaNs.  */
  76   ASSERT (isnanl (roundl (NaNl ())));
  77
  78   return test_exit_status;
  79 }