projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 6d511020 RF |
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 | ||
| 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 | ||
| 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 | ||
| 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"); |