tests/test-ilogb.c

   1 /* Test of ilogb() function.
   2    Copyright (C) 2012-2024 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>, 2012.  */
  18
  19 #include <config.h>
  20
  21 #include <math.h>
  22
  23 #include "signature.h"
  24 SIGNATURE_CHECK (ilogb, int, (double));
  25
  26 #include <float.h>
  27 #include <limits.h>
  28
  29 #include "minus-zero.h"
  30 #include "infinity.h"
  31 #include "nan.h"
  32 #include "macros.h"
  33
  34 #undef INFINITY
  35 #undef NAN
  36
  37 #define DOUBLE double
  38 /* The use of 'volatile' guarantees that excess precision bits are dropped
  39    when dealing with denormalized numbers.  It is necessary on x86 systems
  40    where double-floats are not IEEE compliant by default, to avoid that the
  41    results become platform and compiler option dependent.  'volatile' is a
  42    portable alternative to gcc's -ffloat-store option.  */
  43 #define VOLATILE volatile
  44 #define INFINITY Infinityd ()
  45 #define NAN NaNd ()
  46 #define L_(literal) literal
  47 #define MINUS_ZERO minus_zerod
  48 #define MAX_EXP DBL_MAX_EXP
  49 #define MIN_EXP DBL_MIN_EXP
  50 #define MIN_NORMAL_EXP DBL_MIN_EXP
  51 #define ILOGB ilogb
  52 #define RANDOM randomd
  53 #include "test-ilogb.h"
  54
  55 int
  56 main ()
  57 {
  58   test_function ();
  59
  60   return test_exit_status;
  61 }