/* Test for ldbl-128ibm fmodl etc. handling of equal values.

   Copyright (C) 2016-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <fenv.h>

#include <float.h>

#include <math.h>

#include <stdio.h>

/* FUNC is defined to be the name of the function to test.  */

#define STRX(x) #x

#define STR(x) STRX (x)

#define SFUNC STR (FUNC)

union u

{

  long double ld;

  double d[2];

};

volatile union u p1 = { .d = { DBL_MIN, 0.0 } };

volatile union u p2 = { .d = { DBL_MIN, -0.0 } };

volatile union u m1 = { .d = { -DBL_MIN, 0.0 } };

volatile union u m2 = { .d = { -DBL_MIN, -0.0 } };

static int

test_func (const char *s, long double x, long double y, long double expected)

{

  volatile long double r;

  r = FUNC (x, y);

  if (r != expected || copysignl (1.0, r) != copysignl (1.0, expected))

    {

      printf ("FAIL: " SFUNC " (%s)\n", s);

      return 1;

    }

  else

    {

      printf ("PASS: " SFUNC " (%s)\n", s);

      return 0;

    }

}

#define TEST_FUNC(a, b, e) test_func (#a ", " #b, a, b, e)

static int

do_test (void)

{

  int result = 0;

  SETUP;

  result |= TEST_FUNC (p1.ld, p1.ld, 0.0L);

  result |= TEST_FUNC (p1.ld, p2.ld, 0.0L);

  result |= TEST_FUNC (p1.ld, m1.ld, 0.0L);

  result |= TEST_FUNC (p1.ld, m2.ld, 0.0L);

  result |= TEST_FUNC (p2.ld, p1.ld, 0.0L);

  result |= TEST_FUNC (p2.ld, p2.ld, 0.0L);

  result |= TEST_FUNC (p2.ld, m1.ld, 0.0L);

  result |= TEST_FUNC (p2.ld, m2.ld, 0.0L);

  result |= TEST_FUNC (m1.ld, p1.ld, -0.0L);

  result |= TEST_FUNC (m1.ld, p2.ld, -0.0L);

  result |= TEST_FUNC (m1.ld, m1.ld, -0.0L);

  result |= TEST_FUNC (m1.ld, m2.ld, -0.0L);

  result |= TEST_FUNC (m2.ld, p1.ld, -0.0L);

  result |= TEST_FUNC (m2.ld, p2.ld, -0.0L);

  result |= TEST_FUNC (m2.ld, m1.ld, -0.0L);

  result |= TEST_FUNC (m2.ld, m2.ld, -0.0L);

  return result;

}

#define TEST_FUNCTION do_test ()

#include "../../../test-skeleton.c"