tests/test-setpayloadf.c

   1 /* Test setpayloadf.
   2    Copyright 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 #include <config.h>
  18
  19 /* Specification.  */
  20 #include <math.h>
  21
  22 #include "signature.h"
  23 SIGNATURE_CHECK (setpayloadf, int, (float *, float));
  24
  25 #include "infinity.h"
  26 #include "isnanf-nolibm.h"
  27 #include "macros.h"
  28
  29 #define PAYLOAD_BITS (24 - 2) /* = (FLT_MANT_DIG - 2) */
  30
  31 int
  32 main ()
  33 {
  34   int i;
  35   float p;
  36
  37   {
  38     /* Test valid payloads.  */
  39     for (i = 0, p = 1.0f; i < PAYLOAD_BITS; i++, p *= 2.0f)
  40       {
  41         int ret;
  42         float x;
  43
  44         ret = setpayloadf (&x, p);
  45         ASSERT (ret == 0);
  46         ASSERT (isnanf (x));
  47       }
  48     /* Test out-of-range payload.  */
  49     int ret;
  50     float x;
  51
  52     ret = setpayloadf (&x, p);
  53     ASSERT (ret != 0);
  54     ASSERT (x == 0.0f);
  55   }
  56
  57   /* Test infinite payload.  */
  58   {
  59     int ret;
  60     float x;
  61
  62     ret = setpayloadf (&x, Infinityf ());
  63     ASSERT (ret != 0);
  64     ASSERT (x == 0.0f);
  65   }
  66
  67   /* Test negative payload.  */
  68   {
  69     int ret;
  70     float x;
  71
  72     ret = setpayloadf (&x, -1.0f);
  73     ASSERT (ret != 0);
  74     ASSERT (x == 0.0f);
  75   }
  76
  77   /* Test fractional payload.  */
  78   {
  79     int ret;
  80     float x;
  81
  82     ret = setpayloadf (&x, 1.4f);
  83     ASSERT (ret != 0);
  84     ASSERT (x == 0.0f);
  85   }
  86
  87   return test_exit_status;
  88 }