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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2013 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/test.h>
#include <grub/dl.h>
#include <grub/misc.h>
GRUB_MOD_LICENSE ("GPLv3+");
/* ull version is not used on i386 other than in this test.
Avoid requiring extra function.
*/
#if defined (__i386__)
#define SKIP_ULL 1
#endif
static grub_uint64_t vectors[] = {
0xffffffffffffffffULL, 1, 2, 0, 0x0102030405060708ULL
};
static void
test_ui (unsigned int a)
{
int i;
a |= 1;
for (i = 0; i < (int) (8 * sizeof (a)); i++)
{
grub_test_assert (__builtin_ctz(a << i) == i,
"ctz mismatch: ctz(0x%llx) != 0x%x",
(long long) (a << i), __builtin_ctz(a << i));
}
}
static void
test_ul (unsigned long a)
{
int i;
a |= 1;
for (i = 0; i < (int) (8 * sizeof (a)); i++)
{
grub_test_assert (__builtin_ctzl(a << i) == i,
"ctzl mismatch: ctzl(0x%llx) != 0x%x",
(long long) (a << i), __builtin_ctz(a << i));
}
}
#ifndef SKIP_ULL
static void
test_ull (unsigned long long a)
{
int i;
a |= 1;
for (i = 0; i < (int) (8 * sizeof (a)); i++)
{
grub_test_assert (__builtin_ctzll(a << i) == i,
"ctzll mismatch: ctzll(0x%llx) != 0x%x",
(long long) (a << i), __builtin_ctz(a << i));
}
}
#endif
static void
test_all(grub_uint64_t a)
{
test_ui (a);
test_ul (a);
#ifndef SKIP_ULL
test_ull (a);
#endif
}
static void
ctz_test (void)
{
grub_uint64_t a = 404, b = 7;
grub_size_t i;
for (i = 0; i < ARRAY_SIZE (vectors); i++)
{
test_all (vectors[i]);
}
for (i = 0; i < 40000; i++)
{
a = 17 * a + 13 * b;
b = 23 * a + 29 * b;
if (b == 0)
b = 1;
if (a == 0)
a = 1;
test_all (a);
test_all (b);
}
}
/* Register example_test method as a functional test. */
GRUB_FUNCTIONAL_TEST (ctz_test, ctz_test);
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