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