| 1 | |
| 2 | #include <kunit/test.h>
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| 3 | #include <linux/int_log.h>
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| 4 |
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| 5 | struct test_case_params {
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| 6 | u32 value;
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| 7 | unsigned int expected_result;
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| 8 | const char *name;
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| 9 | };
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| 10 |
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| 11 |
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| 12 |
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| 13 | static const struct test_case_params intlog2_params[] = {
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| 14 | {0, 0, "Log base 2 of 0"},
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| 15 | {1, 0, "Log base 2 of 1"},
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| 16 | {2, 16777216, "Log base 2 of 2"},
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| 17 | {3, 26591232, "Log base 2 of 3"},
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| 18 | {4, 33554432, "Log base 2 of 4"},
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| 19 | {8, 50331648, "Log base 2 of 8"},
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| 20 | {16, 67108864, "Log base 2 of 16"},
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| 21 | {32, 83886080, "Log base 2 of 32"},
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| 22 | {U32_MAX, 536870911, "Log base 2 of MAX"},
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| 23 | };
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| 24 |
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| 25 | static const struct test_case_params intlog10_params[] = {
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| 26 | {0, 0, "Log base 10 of 0"},
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| 27 | {1, 0, "Log base 10 of 1"},
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| 28 | {6, 13055203, "Log base 10 of 6"},
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| 29 | {10, 16777225, "Log base 10 of 10"},
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| 30 | {100, 33554450, "Log base 10 of 100"},
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| 31 | {1000, 50331675, "Log base 10 of 1000"},
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| 32 | {10000, 67108862, "Log base 10 of 10000"},
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| 33 | {U32_MAX, 161614247, "Log base 10 of MAX"}
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| 34 | };
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| 35 |
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| 36 | static void get_desc(const struct test_case_params *tc, char *desc)
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| 37 | {
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| 38 | strscpy(desc, tc->name, KUNIT_PARAM_DESC_SIZE);
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| 39 | }
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| 40 |
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| 41 |
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| 42 | KUNIT_ARRAY_PARAM(intlog2, intlog2_params, get_desc);
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| 43 |
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| 44 | static void intlog2_test(struct kunit *test)
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| 45 | {
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| 46 | const struct test_case_params *tc = (const struct test_case_params *)test->param_value;
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| 47 |
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| 48 | KUNIT_EXPECT_EQ(test, tc->expected_result, intlog2(tc->value));
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| 49 | }
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| 50 |
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| 51 | KUNIT_ARRAY_PARAM(intlog10, intlog10_params, get_desc);
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| 52 |
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| 53 | static void intlog10_test(struct kunit *test)
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| 54 | {
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| 55 | const struct test_case_params *tc = (const struct test_case_params *)test->param_value;
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| 56 |
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| 57 | KUNIT_EXPECT_EQ(test, tc->expected_result, intlog10(tc->value));
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| 58 | }
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| 59 |
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| 60 | static struct kunit_case math_int_log_test_cases[] = {
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| 61 | KUNIT_CASE_PARAM(intlog2_test, intlog2_gen_params),
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| 62 | KUNIT_CASE_PARAM(intlog10_test, intlog10_gen_params),
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| 63 | {}
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| 64 | };
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| 65 |
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| 66 | static struct kunit_suite int_log_test_suite = {
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| 67 | .name = "math-int_log",
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| 68 | .test_cases = math_int_log_test_cases,
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| 69 | };
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| 70 |
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| 71 | kunit_test_suites(&int_log_test_suite);
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| 72 |
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| 73 | MODULE_DESCRIPTION("math.int_log KUnit test suite");
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| 74 | MODULE_LICENSE("GPL");
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