diff options
Diffstat (limited to 'lib/tests/test_bits.c')
| -rw-r--r-- | lib/tests/test_bits.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/lib/tests/test_bits.c b/lib/tests/test_bits.c index c7b38d91e1f1..ab88e50d2edf 100644 --- a/lib/tests/test_bits.c +++ b/lib/tests/test_bits.c @@ -5,7 +5,44 @@ #include <kunit/test.h> #include <linux/bits.h> +#include <linux/types.h> +#define assert_type(t, x) _Generic(x, t: x, default: 0) + +static_assert(assert_type(u8, BIT_U8(0)) == 1u); +static_assert(assert_type(u16, BIT_U16(0)) == 1u); +static_assert(assert_type(u32, BIT_U32(0)) == 1u); +static_assert(assert_type(u64, BIT_U64(0)) == 1ull); + +static_assert(assert_type(u8, BIT_U8(7)) == 0x80u); +static_assert(assert_type(u16, BIT_U16(15)) == 0x8000u); +static_assert(assert_type(u32, BIT_U32(31)) == 0x80000000u); +static_assert(assert_type(u64, BIT_U64(63)) == 0x8000000000000000ull); + +static_assert(assert_type(unsigned long, GENMASK(31, 0)) == U32_MAX); +static_assert(assert_type(unsigned long long, GENMASK_ULL(63, 0)) == U64_MAX); +static_assert(assert_type(u8, GENMASK_U8(7, 0)) == U8_MAX); +static_assert(assert_type(u16, GENMASK_U16(15, 0)) == U16_MAX); +static_assert(assert_type(u32, GENMASK_U32(31, 0)) == U32_MAX); +static_assert(assert_type(u64, GENMASK_U64(63, 0)) == U64_MAX); + +/* FIXME: add a test case written in asm for GENMASK() and GENMASK_ULL() */ + +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)); +} + +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)); +} static void genmask_test(struct kunit *test) { @@ -14,11 +51,21 @@ static void genmask_test(struct kunit *test) KUNIT_EXPECT_EQ(test, 6ul, GENMASK(2, 1)); KUNIT_EXPECT_EQ(test, 0xFFFFFFFFul, GENMASK(31, 0)); + KUNIT_EXPECT_EQ(test, 1u, GENMASK_U8(0, 0)); + KUNIT_EXPECT_EQ(test, 3u, GENMASK_U16(1, 0)); + KUNIT_EXPECT_EQ(test, 0x10000, GENMASK_U32(16, 16)); + #ifdef TEST_GENMASK_FAILURES /* these should fail compilation */ GENMASK(0, 1); GENMASK(0, 10); GENMASK(9, 10); + + GENMASK_U32(0, 31); + GENMASK_U64(64, 0); + GENMASK_U32(32, 0); + GENMASK_U16(16, 0); + GENMASK_U8(8, 0); #endif @@ -93,6 +140,8 @@ static void genmask_input_check_test(struct kunit *test) static struct kunit_case bits_test_cases[] = { + KUNIT_CASE(__genmask_test), + KUNIT_CASE(__genmask_ull_test), KUNIT_CASE(genmask_test), KUNIT_CASE(genmask_ull_test), KUNIT_CASE(genmask_u128_test), |