janwas
2624069993
test_bits: add tests for all routines in bits.h hpet: add safety check unit.h, bits.h, DOMEvent.h: change T(~0) to ~T(0) (required when T is 64-bit) This was SVN commit r6335.
139 lines
4.1 KiB
C++
139 lines
4.1 KiB
C++
#include "lib/self_test.h"
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#include "lib/bits.h"
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#define EQUALS(actual, expected) debug_assert((actual) == (expected))
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class TestBits : public CxxTest::TestSuite
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{
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public:
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void test_Bit()
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{
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EQUALS(Bit<unsigned>(0), 1);
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EQUALS(Bit<unsigned>(8), 0x100);
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EQUALS(Bit<u32>(31), u32(0x80000000ul));
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EQUALS(Bit<u64>(1), u64(2));
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EQUALS(Bit<u64>(32), u64(0x100000000ull));
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EQUALS(Bit<u64>(63), u64(0x8000000000000000ull));
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}
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void test_IsBitSet()
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{
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EQUALS(IsBitSet(0u, 1), false);
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EQUALS(IsBitSet(1u, 1), false);
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EQUALS(IsBitSet(2u, 1), true);
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EQUALS(IsBitSet<u32>(0xFFFFFFFFul, 0), true);
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EQUALS(IsBitSet<u32>(0xFFFFFFFFul, 31), true);
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EQUALS(IsBitSet<u64>(0xFFFFFFFFFFFFFFFFull, 0), true);
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EQUALS(IsBitSet<u64>(0xFFFFFFFFFFFFFFFFull, 31), true);
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EQUALS(IsBitSet<u64>(0xFFFFFFFFFFFFFFFFull, 32), true);
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EQUALS(IsBitSet<u64>(0xFFFFFFFFFFFFFFFFull, 63), true);
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}
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void test_bit_mask()
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{
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EQUALS(bit_mask<u16>(0), 0);
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EQUALS(bit_mask<u16>(2), 0x3);
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EQUALS(bit_mask<u16>(16), 0xFFFF);
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EQUALS(bit_mask<u32>(0), 0);
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EQUALS(bit_mask<u32>(2), 0x3);
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EQUALS(bit_mask<u32>(32), 0xFFFFFFFFul);
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EQUALS(bit_mask<u64>(0), 0);
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EQUALS(bit_mask<u64>(2), 0x3);
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EQUALS(bit_mask<u64>(32), 0xFFFFFFFFull);
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EQUALS(bit_mask<u64>(64), 0xFFFFFFFFFFFFFFFFull);
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}
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void test_bits()
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{
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EQUALS(bits<u16>(0xFFFF, 0, 15), 0xFFFF);
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EQUALS(bits<u16>(0xFFFF, 0, 7), 0xFF);
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EQUALS(bits<u16>(0xFFFF, 8, 15), 0xFF);
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EQUALS(bits<u16>(0xFFFF, 14, 15), 0x3);
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EQUALS(bits<u16>(0xAA55, 4, 11), 0xA5);
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EQUALS(bits<u16>(0xAA55, 14, 15), 0x2);
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EQUALS(bits<u32>(0ul, 0, 31), 0ul);
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EQUALS(bits<u32>(0xFFFFFFFFul, 0, 31), 0xFFFFFFFFul);
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EQUALS(bits<u64>(0ull, 0, 63), 0ull);
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EQUALS(bits<u64>(0xFFFFFFFFull, 0, 31), 0xFFFFFFFFull);
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EQUALS(bits<u64>(0x0000FFFFFFFF0000ull, 16, 47), 0xFFFFFFFFull);
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EQUALS(bits<u64>(0xFFFFFFFFFFFFFFFFull, 0, 63), 0xFFFFFFFFFFFFFFFFull);
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EQUALS(bits<u64>(0xA5A5A5A5A5A5A5A5ull, 32, 63), 0xA5A5A5A5ull);
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}
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void test_PopulationCount()
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{
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EQUALS(PopulationCount<u8>(0), 0);
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EQUALS(PopulationCount<u8>(4), 1);
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EQUALS(PopulationCount<u8>(0x28), 2);
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EQUALS(PopulationCount<u8>(0xFF), 8);
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EQUALS(PopulationCount<u32>(0x0ul), 0);
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EQUALS(PopulationCount<u32>(0x8ul), 1);
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EQUALS(PopulationCount<u32>(0xFFFFul), 16);
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EQUALS(PopulationCount<u32>(0xFFFFFFFFul), 32);
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EQUALS(PopulationCount<u64>(0x0ull), 0);
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EQUALS(PopulationCount<u64>(0x10ull), 1);
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EQUALS(PopulationCount<u64>(0xFFFFull), 16);
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EQUALS(PopulationCount<u64>(0xFFFFFFFFull), 32);
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EQUALS(PopulationCount<u64>(0xFFFFFFFFFFFFFFFEull), 63);
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EQUALS(PopulationCount<u64>(0xFFFFFFFFFFFFFFFFull), 64);
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}
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void test_is_pow2()
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{
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EQUALS(is_pow2(0u), false);
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EQUALS(is_pow2(~0u), false);
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EQUALS(is_pow2(0x80000001), false);
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EQUALS(is_pow2(1), true);
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EQUALS(is_pow2(1u << 31), true);
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}
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void test_ceil_log2()
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{
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EQUALS(ceil_log2(3u), 2u);
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EQUALS(ceil_log2(0xffffffffu), 32u);
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EQUALS(ceil_log2(1u), 0u);
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EQUALS(ceil_log2(256u), 8u);
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EQUALS(ceil_log2(0x80000000u), 31u);
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}
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void test_floor_log2()
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{
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EQUALS(floor_log2(1.f), 0);
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EQUALS(floor_log2(3.f), 1);
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EQUALS(floor_log2(256.f), 8);
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}
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void test_round_up_to_pow2()
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{
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EQUALS(round_up_to_pow2(0u), 1u);
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EQUALS(round_up_to_pow2(1u), 1u);
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EQUALS(round_up_to_pow2(127u), 128u);
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EQUALS(round_up_to_pow2(128u), 128u);
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EQUALS(round_up_to_pow2(129u), 256u);
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}
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void test_round_up()
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{
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EQUALS(round_up( 0u, 16u), 0u);
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EQUALS(round_up( 4u, 16u), 16u);
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EQUALS(round_up(15u, 16u), 16u);
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EQUALS(round_up(20u, 32u), 32u);
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EQUALS(round_up(29u, 32u), 32u);
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EQUALS(round_up(0x1000u, 0x1000u), 0x1000u);
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EQUALS(round_up(0x1001u, 0x1000u), 0x2000u);
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EQUALS(round_up(0x1900u, 0x1000u), 0x2000u);
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}
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void test_round_down()
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{
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EQUALS(round_down( 0u, 16u), 0u);
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EQUALS(round_down( 4u, 16u), 0u);
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EQUALS(round_down(15u, 16u), 0u);
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EQUALS(round_down(20u, 16u), 16u);
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EQUALS(round_down(29u, 16u), 16u);
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EQUALS(round_down(0x1900u, 0x1000u), 0x1000u);
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EQUALS(round_down(0x2001u, 0x2000u), 0x2000u);
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}
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};
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