1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0+
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Test cases for functions and macros in bits.h
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include <kunit/test.h>
7*4882a593Smuzhiyun #include <linux/bits.h>
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun
genmask_test(struct kunit * test)10*4882a593Smuzhiyun static void genmask_test(struct kunit *test)
11*4882a593Smuzhiyun {
12*4882a593Smuzhiyun KUNIT_EXPECT_EQ(test, 1ul, GENMASK(0, 0));
13*4882a593Smuzhiyun KUNIT_EXPECT_EQ(test, 3ul, GENMASK(1, 0));
14*4882a593Smuzhiyun KUNIT_EXPECT_EQ(test, 6ul, GENMASK(2, 1));
15*4882a593Smuzhiyun KUNIT_EXPECT_EQ(test, 0xFFFFFFFFul, GENMASK(31, 0));
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun #ifdef TEST_GENMASK_FAILURES
18*4882a593Smuzhiyun /* these should fail compilation */
19*4882a593Smuzhiyun GENMASK(0, 1);
20*4882a593Smuzhiyun GENMASK(0, 10);
21*4882a593Smuzhiyun GENMASK(9, 10);
22*4882a593Smuzhiyun #endif
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun }
26*4882a593Smuzhiyun
genmask_ull_test(struct kunit * test)27*4882a593Smuzhiyun static void genmask_ull_test(struct kunit *test)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun KUNIT_EXPECT_EQ(test, 1ull, GENMASK_ULL(0, 0));
30*4882a593Smuzhiyun KUNIT_EXPECT_EQ(test, 3ull, GENMASK_ULL(1, 0));
31*4882a593Smuzhiyun KUNIT_EXPECT_EQ(test, 0x000000ffffe00000ull, GENMASK_ULL(39, 21));
32*4882a593Smuzhiyun KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_ULL(63, 0));
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun #ifdef TEST_GENMASK_FAILURES
35*4882a593Smuzhiyun /* these should fail compilation */
36*4882a593Smuzhiyun GENMASK_ULL(0, 1);
37*4882a593Smuzhiyun GENMASK_ULL(0, 10);
38*4882a593Smuzhiyun GENMASK_ULL(9, 10);
39*4882a593Smuzhiyun #endif
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
genmask_input_check_test(struct kunit * test)42*4882a593Smuzhiyun static void genmask_input_check_test(struct kunit *test)
43*4882a593Smuzhiyun {
44*4882a593Smuzhiyun unsigned int x, y;
45*4882a593Smuzhiyun int z, w;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun /* Unknown input */
48*4882a593Smuzhiyun KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(x, 0));
49*4882a593Smuzhiyun KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(0, x));
50*4882a593Smuzhiyun KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(x, y));
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(z, 0));
53*4882a593Smuzhiyun KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(0, z));
54*4882a593Smuzhiyun KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(z, w));
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun /* Valid input */
57*4882a593Smuzhiyun KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(1, 1));
58*4882a593Smuzhiyun KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(39, 21));
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun static struct kunit_case bits_test_cases[] = {
63*4882a593Smuzhiyun KUNIT_CASE(genmask_test),
64*4882a593Smuzhiyun KUNIT_CASE(genmask_ull_test),
65*4882a593Smuzhiyun KUNIT_CASE(genmask_input_check_test),
66*4882a593Smuzhiyun {}
67*4882a593Smuzhiyun };
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun static struct kunit_suite bits_test_suite = {
70*4882a593Smuzhiyun .name = "bits-test",
71*4882a593Smuzhiyun .test_cases = bits_test_cases,
72*4882a593Smuzhiyun };
73*4882a593Smuzhiyun kunit_test_suite(bits_test_suite);
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun MODULE_LICENSE("GPL");
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