1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Test cases for functions and macros in bits.h
4 */
5
6 #include <kunit/test.h>
7 #include <linux/bits.h>
8
9
genmask_test(struct kunit * test)10 static void genmask_test(struct kunit *test)
11 {
12 KUNIT_EXPECT_EQ(test, 1ul, GENMASK(0, 0));
13 KUNIT_EXPECT_EQ(test, 3ul, GENMASK(1, 0));
14 KUNIT_EXPECT_EQ(test, 6ul, GENMASK(2, 1));
15 KUNIT_EXPECT_EQ(test, 0xFFFFFFFFul, GENMASK(31, 0));
16
17 #ifdef TEST_GENMASK_FAILURES
18 /* these should fail compilation */
19 GENMASK(0, 1);
20 GENMASK(0, 10);
21 GENMASK(9, 10);
22 #endif
23
24
25 }
26
genmask_ull_test(struct kunit * test)27 static void genmask_ull_test(struct kunit *test)
28 {
29 KUNIT_EXPECT_EQ(test, 1ull, GENMASK_ULL(0, 0));
30 KUNIT_EXPECT_EQ(test, 3ull, GENMASK_ULL(1, 0));
31 KUNIT_EXPECT_EQ(test, 0x000000ffffe00000ull, GENMASK_ULL(39, 21));
32 KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_ULL(63, 0));
33
34 #ifdef TEST_GENMASK_FAILURES
35 /* these should fail compilation */
36 GENMASK_ULL(0, 1);
37 GENMASK_ULL(0, 10);
38 GENMASK_ULL(9, 10);
39 #endif
40 }
41
genmask_input_check_test(struct kunit * test)42 static void genmask_input_check_test(struct kunit *test)
43 {
44 unsigned int x, y;
45 int z, w;
46
47 /* Unknown input */
48 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(x, 0));
49 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(0, x));
50 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(x, y));
51
52 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(z, 0));
53 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(0, z));
54 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(z, w));
55
56 /* Valid input */
57 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(1, 1));
58 KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(39, 21));
59 }
60
61
62 static struct kunit_case bits_test_cases[] = {
63 KUNIT_CASE(genmask_test),
64 KUNIT_CASE(genmask_ull_test),
65 KUNIT_CASE(genmask_input_check_test),
66 {}
67 };
68
69 static struct kunit_suite bits_test_suite = {
70 .name = "bits-test",
71 .test_cases = bits_test_cases,
72 };
73 kunit_test_suite(bits_test_suite);
74
75 MODULE_LICENSE("GPL");
76
