// SPDX-License-Identifier: GPL-2.0+ /* * Test cases for functions and macros in bits.h */ #include <kunit/test.h> #include <linux/bits.h> static void genmask_test(struct kunit *test) { KUNIT_EXPECT_EQ(test, 1ul, GENMASK(0, 0)); KUNIT_EXPECT_EQ(test, 3ul, GENMASK(1, 0)); KUNIT_EXPECT_EQ(test, 6ul, GENMASK(2, 1)); KUNIT_EXPECT_EQ(test, 0xFFFFFFFFul, GENMASK(31, 0)); #ifdef TEST_GENMASK_FAILURES /* these should fail compilation */ GENMASK(0, 1); GENMASK(0, 10); GENMASK(9, 10); #endif } static void genmask_ull_test(struct kunit *test) { KUNIT_EXPECT_EQ(test, 1ull, GENMASK_ULL(0, 0)); KUNIT_EXPECT_EQ(test, 3ull, GENMASK_ULL(1, 0)); KUNIT_EXPECT_EQ(test, 0x000000ffffe00000ull, GENMASK_ULL(39, 21)); KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_ULL(63, 0)); #ifdef TEST_GENMASK_FAILURES /* these should fail compilation */ GENMASK_ULL(0, 1); GENMASK_ULL(0, 10); GENMASK_ULL(9, 10); #endif } static void genmask_input_check_test(struct kunit *test) { unsigned int x, y; int z, w; /* Unknown input */ KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(x, 0)); KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(0, x)); KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(x, y)); KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(z, 0)); KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(0, z)); KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(z, w)); /* Valid input */ KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(1, 1)); KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(39, 21)); } static struct kunit_case bits_test_cases[] = { KUNIT_CASE(genmask_test), KUNIT_CASE(genmask_ull_test), KUNIT_CASE(genmask_input_check_test), {} }; static struct kunit_suite bits_test_suite = { .name = "bits-test", .test_cases = bits_test_cases, }; kunit_test_suite(bits_test_suite); MODULE_LICENSE("GPL");