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d7bcc37436
This adds GENMASK_U128() tests although currently only 64 bit wide masks are being tested. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: linux-kernel@vger.kernel.org Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Signed-off-by: Yury Norov <yury.norov@gmail.com>
111 lines
3.4 KiB
C
111 lines
3.4 KiB
C
// 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_u128_test(struct kunit *test)
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{
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#ifdef CONFIG_ARCH_SUPPORTS_INT128
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/* Below 64 bit masks */
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KUNIT_EXPECT_EQ(test, 0x0000000000000001ull, GENMASK_U128(0, 0));
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KUNIT_EXPECT_EQ(test, 0x0000000000000003ull, GENMASK_U128(1, 0));
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KUNIT_EXPECT_EQ(test, 0x0000000000000006ull, GENMASK_U128(2, 1));
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KUNIT_EXPECT_EQ(test, 0x00000000ffffffffull, GENMASK_U128(31, 0));
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KUNIT_EXPECT_EQ(test, 0x000000ffffe00000ull, GENMASK_U128(39, 21));
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KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_U128(63, 0));
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/* Above 64 bit masks - only 64 bit portion can be validated once */
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KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_U128(64, 0) >> 1);
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KUNIT_EXPECT_EQ(test, 0x00000000ffffffffull, GENMASK_U128(81, 50) >> 50);
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KUNIT_EXPECT_EQ(test, 0x0000000000ffffffull, GENMASK_U128(87, 64) >> 64);
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KUNIT_EXPECT_EQ(test, 0x0000000000ff0000ull, GENMASK_U128(87, 80) >> 64);
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KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_U128(127, 0) >> 64);
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KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, (u64)GENMASK_U128(127, 0));
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KUNIT_EXPECT_EQ(test, 0x0000000000000003ull, GENMASK_U128(127, 126) >> 126);
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KUNIT_EXPECT_EQ(test, 0x0000000000000001ull, GENMASK_U128(127, 127) >> 127);
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#ifdef TEST_GENMASK_FAILURES
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/* these should fail compilation */
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GENMASK_U128(0, 1);
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GENMASK_U128(0, 10);
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GENMASK_U128(9, 10);
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#endif /* TEST_GENMASK_FAILURES */
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#endif /* CONFIG_ARCH_SUPPORTS_INT128 */
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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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KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(100, 80));
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KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(110, 65));
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KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(127, 0));
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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_u128_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_DESCRIPTION("Test cases for functions and macros in bits.h");
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MODULE_LICENSE("GPL");
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