Eric Lee / smarc-fsl-linux-kernel

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lib/test_bits.c 1.77 KB
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6d511020e   Rikard Falkeborn   lib/test_bits.c: ... 
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  // 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");