112 lines
2.4 KiB
C
112 lines
2.4 KiB
C
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2013 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/test.h>
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#include <grub/dl.h>
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#include <grub/misc.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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/* ull version is not used on i386 other than in this test.
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Avoid requiring extra function.
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*/
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#if defined (__i386__)
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#define SKIP_ULL 1
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#endif
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static grub_uint64_t vectors[] = {
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0xffffffffffffffffULL, 1, 2, 0, 0x0102030405060708ULL
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};
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static void
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test_ui (unsigned int a)
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{
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int i;
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a |= 1;
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for (i = 0; i < (int) (8 * sizeof (a)); i++)
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{
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grub_test_assert (__builtin_ctz(a << i) == i,
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"ctz mismatch: ctz(0x%llx) != 0x%x",
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(long long) (a << i), __builtin_ctz(a << i));
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}
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}
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static void
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test_ul (unsigned long a)
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{
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int i;
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a |= 1;
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for (i = 0; i < (int) (8 * sizeof (a)); i++)
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{
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grub_test_assert (__builtin_ctzl(a << i) == i,
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"ctzl mismatch: ctzl(0x%llx) != 0x%x",
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(long long) (a << i), __builtin_ctz(a << i));
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}
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}
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#ifndef SKIP_ULL
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static void
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test_ull (unsigned long long a)
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{
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int i;
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a |= 1;
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for (i = 0; i < (int) (8 * sizeof (a)); i++)
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{
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grub_test_assert (__builtin_ctzll(a << i) == i,
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"ctzll mismatch: ctzll(0x%llx) != 0x%x",
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(long long) (a << i), __builtin_ctz(a << i));
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}
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}
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#endif
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static void
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test_all(grub_uint64_t a)
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{
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test_ui (a);
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test_ul (a);
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#ifndef SKIP_ULL
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test_ull (a);
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#endif
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}
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static void
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ctz_test (void)
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{
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grub_uint64_t a = 404, b = 7;
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grub_size_t i;
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for (i = 0; i < ARRAY_SIZE (vectors); i++)
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{
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test_all (vectors[i]);
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}
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for (i = 0; i < 40000; i++)
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{
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a = 17 * a + 13 * b;
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b = 23 * a + 29 * b;
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if (b == 0)
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b = 1;
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if (a == 0)
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a = 1;
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test_all (a);
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test_all (b);
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}
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}
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/* Register example_test method as a functional test. */
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GRUB_FUNCTIONAL_TEST (ctz_test, ctz_test);
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