tests/test-frexp.c

   1 /* Test of splitting a double into fraction and mantissa.
   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 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 (frexp, double, (double, int *));
  25
  26 #include <float.h>
  27
  28 #include "isnand-nolibm.h"
  29 #include "minus-zero.h"
  30 #include "infinity.h"
  31 #include "nan.h"
  32 #include "macros.h"
  33
  34 /* Avoid some warnings from "gcc -Wshadow".
  35    This file doesn't use the exp() function.  */
  36 #undef exp
  37 #define exp exponent
  38
  39 #undef INFINITY
  40 #undef NAN
  41
  42 #define DOUBLE double
  43 /* The use of 'volatile' guarantees that excess precision bits are dropped
  44    when dealing with denormalized numbers.  It is necessary on x86 systems
  45    where double-floats are not IEEE compliant by default, to avoid that the
  46    results become platform and compiler option dependent.  'volatile' is a
  47    portable alternative to gcc's -ffloat-store option.  */
  48 #define VOLATILE volatile
  49 #define ISNAN isnand
  50 #define INFINITY Infinityd ()
  51 #define NAN NaNd ()
  52 #define L_(literal) literal
  53 #define MINUS_ZERO minus_zerod
  54 #define MAX_EXP DBL_MAX_EXP
  55 #define MIN_EXP DBL_MIN_EXP
  56 #define MIN_NORMAL_EXP DBL_MIN_EXP
  57 #define FREXP frexp
  58 #define RANDOM randomd
  59 #include "test-frexp.h"
  60
  61 int
  62 main ()
  63 {
  64   test_function ();
  65
  66   return test_exit_status;
  67 }