tests/test-rintf.c

   1 /* Test of rintf() function.
   2    Copyright (C) 2010-2024 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>, 2010.  */
  18
  19 #include <config.h>
  20
  21 #include <math.h>
  22
  23 #include "signature.h"
  24 SIGNATURE_CHECK (rintf, float, (float));
  25
  26 #include <float.h>
  27 #include <stdio.h>
  28
  29 #include "isnanf-nolibm.h"
  30 #include "minus-zero.h"
  31 #include "infinity.h"
  32 #include "nan.h"
  33 #include "macros.h"
  34
  35 #undef INFINITY
  36 #undef NAN
  37
  38 #define DOUBLE float
  39 #define ISNAN isnanf
  40 #define INFINITY Infinityf ()
  41 #define NAN NaNf ()
  42 #define L_(literal) literal##f
  43 #define RINT rintf
  44 #define RANDOM randomf
  45 #include "test-rint.h"
  46
  47 int
  48 main ()
  49 {
  50   /* Consider the current rounding mode, cf.
  51      <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/float.h.html>  */
  52   if (FLT_ROUNDS == 1)
  53     {
  54       /* The current rounding mode is round-to-nearest
  55          (the default in IEEE 754).  */
  56
  57       /* Zero.  */
  58       ASSERT (rintf (0.0f) == 0.0f);
  59       ASSERT (rintf (minus_zerof) == 0.0f);
  60       /* Positive numbers.  */
  61       ASSERT (rintf (0.3f) == 0.0f);
  62       ASSERT (rintf (0.5f) == 0.0f); /* unlike roundf() */
  63       ASSERT (rintf (0.7f) == 1.0f);
  64       ASSERT (rintf (1.0f) == 1.0f);
  65       ASSERT (rintf (1.5f) == 2.0f);
  66       ASSERT (rintf (1.999f) == 2.0f);
  67       ASSERT (rintf (2.0f) == 2.0f);
  68       ASSERT (rintf (2.1f) == 2.0f);
  69       ASSERT (rintf (2.5f) == 2.0f); /* unlike roundf() */
  70       ASSERT (rintf (2.7f) == 3.0f);
  71       ASSERT (rintf (65535.99f) == 65536.0f);
  72       ASSERT (rintf (65536.0f) == 65536.0f);
  73       ASSERT (rintf (65536.01f) == 65536.0f);
  74       ASSERT (rintf (2.341e31f) == 2.341e31f);
  75       /* Negative numbers.  */
  76       ASSERT (rintf (-0.3f) == 0.0f);
  77       ASSERT (rintf (-0.5f) == 0.0f); /* unlike roundf() */
  78       ASSERT (rintf (-0.7f) == -1.0f);
  79       ASSERT (rintf (-1.0f) == -1.0f);
  80       ASSERT (rintf (-1.5f) == -2.0f);
  81       ASSERT (rintf (-1.999f) == -2.0f);
  82       ASSERT (rintf (-2.0f) == -2.0f);
  83       ASSERT (rintf (-2.1f) == -2.0f);
  84       ASSERT (rintf (-2.5f) == -2.0f); /* unlike roundf() */
  85       ASSERT (rintf (-2.7f) == -3.0f);
  86       ASSERT (rintf (-65535.99f) == -65536.0f);
  87       ASSERT (rintf (-65536.0f) == -65536.0f);
  88       ASSERT (rintf (-65536.01f) == -65536.0f);
  89       ASSERT (rintf (-2.341e31f) == -2.341e31f);
  90
  91       test_function ();
  92
  93       return test_exit_status;
  94     }
  95   else
  96     {
  97       fputs ("Skipping test: non-standard rounding mode\n", stderr);
  98       return 77;
  99     }
 100 }