tests/test-truncl.c

   1 /* Test of rounding towards zero.
   2    Copyright (C) 2007-2021 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 (truncl, long double, (long double));
  25
  26 #include <float.h>
  27
  28 #include "fpucw.h"
  29 #include "isnanl-nolibm.h"
  30 #include "minus-zero.h"
  31 #include "infinity.h"
  32 #include "nan.h"
  33 #include "macros.h"
  34
  35 int
  36 main ()
  37 {
  38   DECL_LONG_DOUBLE_ROUNDING
  39
  40   BEGIN_LONG_DOUBLE_ROUNDING ();
  41
  42   /* Zero.  */
  43   ASSERT (truncl (0.0L) == 0.0L);
  44   ASSERT (truncl (minus_zerol) == 0.0L);
  45   /* Positive numbers.  */
  46   ASSERT (truncl (0.3L) == 0.0L);
  47   ASSERT (truncl (0.7L) == 0.0L);
  48   ASSERT (truncl (1.0L) == 1.0L);
  49   ASSERT (truncl (1.5L) == 1.0L);
  50   ASSERT (truncl (1.999L) == 1.0L);
  51   ASSERT (truncl (2.0L) == 2.0L);
  52   ASSERT (truncl (65535.999L) == 65535.0L);
  53   ASSERT (truncl (65536.0L) == 65536.0L);
  54   ASSERT (truncl (2.341e31L) == 2.341e31L);
  55   /* Negative numbers.  */
  56   ASSERT (truncl (-0.3L) == 0.0L);
  57   ASSERT (truncl (-0.7L) == 0.0L);
  58   ASSERT (truncl (-1.0L) == -1.0L);
  59   ASSERT (truncl (-1.5L) == -1.0L);
  60   ASSERT (truncl (-1.999L) == -1.0L);
  61   ASSERT (truncl (-2.0L) == -2.0L);
  62   ASSERT (truncl (-65535.999L) == -65535.0L);
  63   ASSERT (truncl (-65536.0L) == -65536.0L);
  64   ASSERT (truncl (-2.341e31L) == -2.341e31L);
  65   /* Infinite numbers.  */
  66   ASSERT (truncl (Infinityl ()) == Infinityl ());
  67   ASSERT (truncl (- Infinityl ()) == - Infinityl ());
  68   /* NaNs.  */
  69   ASSERT (isnanl (truncl (NaNl ())));
  70
  71   return 0;
  72 }