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/* Test for ldbl-128ibm fmodl handling of equal values (bug 19602).
Copyright (C) 2016 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 <float.h>
#include <math.h>
#include <stdio.h>
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_fmodl (const char *s, long double x, long double y, long double expected)
{
volatile long double r;
r = fmodl (x, y);
if (r != expected || copysignl (1.0, r) != copysignl (1.0, expected))
{
printf ("FAIL: fmodl (%s)\n", s);
return 1;
}
else
{
printf ("PASS: fmodl (%s)\n", s);
return 0;
}
}
#define TEST_FMODL(a, b, e) test_fmodl (#a ", " #b, a, b, e)
static int
do_test (void)
{
int result = 0;
result |= TEST_FMODL (p1.ld, p1.ld, 0.0L);
result |= TEST_FMODL (p1.ld, p2.ld, 0.0L);
result |= TEST_FMODL (p1.ld, m1.ld, 0.0L);
result |= TEST_FMODL (p1.ld, m2.ld, 0.0L);
result |= TEST_FMODL (p2.ld, p1.ld, 0.0L);
result |= TEST_FMODL (p2.ld, p2.ld, 0.0L);
result |= TEST_FMODL (p2.ld, m1.ld, 0.0L);
result |= TEST_FMODL (p2.ld, m2.ld, 0.0L);
result |= TEST_FMODL (m1.ld, p1.ld, -0.0L);
result |= TEST_FMODL (m1.ld, p2.ld, -0.0L);
result |= TEST_FMODL (m1.ld, m1.ld, -0.0L);
result |= TEST_FMODL (m1.ld, m2.ld, -0.0L);
result |= TEST_FMODL (m2.ld, p1.ld, -0.0L);
result |= TEST_FMODL (m2.ld, p2.ld, -0.0L);
result |= TEST_FMODL (m2.ld, m1.ld, -0.0L);
result |= TEST_FMODL (m2.ld, m2.ld, -0.0L);
return result;
}
#define TEST_FUNCTION do_test ()
#include "../../../test-skeleton.c"
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