57 lines
2.1 KiB
C++
57 lines
2.1 KiB
C++
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/*
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* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*/
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#include "precompiled.hpp"
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#include "gc/z/zUtils.inline.hpp"
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#include "unittest.hpp"
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#include <limits>
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template <typename T>
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static T max_alignment() {
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T max = std::numeric_limits<T>::max();
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return max ^ (max >> 1);
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}
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TEST(ZUtilsTest, round_up_power_of_2) {
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EXPECT_EQ(ZUtils::round_up_power_of_2(1u), 1u);
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EXPECT_EQ(ZUtils::round_up_power_of_2(2u), 2u);
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EXPECT_EQ(ZUtils::round_up_power_of_2(3u), 4u);
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EXPECT_EQ(ZUtils::round_up_power_of_2(4u), 4u);
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EXPECT_EQ(ZUtils::round_up_power_of_2(5u), 8u);
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EXPECT_EQ(ZUtils::round_up_power_of_2(6u), 8u);
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EXPECT_EQ(ZUtils::round_up_power_of_2(7u), 8u);
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EXPECT_EQ(ZUtils::round_up_power_of_2(8u), 8u);
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EXPECT_EQ(ZUtils::round_up_power_of_2(9u), 16u);
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EXPECT_EQ(ZUtils::round_up_power_of_2(10u), 16u);
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EXPECT_EQ(ZUtils::round_up_power_of_2(1023u), 1024u);
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EXPECT_EQ(ZUtils::round_up_power_of_2(1024u), 1024u);
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EXPECT_EQ(ZUtils::round_up_power_of_2(1025u), 2048u);
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const size_t max = max_alignment<size_t>();
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EXPECT_EQ(ZUtils::round_up_power_of_2(max - 1), max);
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EXPECT_EQ(ZUtils::round_up_power_of_2(max), max);
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}
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TEST(ZUtilsTest, round_down_power_of_2) {
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EXPECT_EQ(ZUtils::round_down_power_of_2(1u), 1u);
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EXPECT_EQ(ZUtils::round_down_power_of_2(2u), 2u);
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EXPECT_EQ(ZUtils::round_down_power_of_2(3u), 2u);
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EXPECT_EQ(ZUtils::round_down_power_of_2(4u), 4u);
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EXPECT_EQ(ZUtils::round_down_power_of_2(5u), 4u);
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EXPECT_EQ(ZUtils::round_down_power_of_2(6u), 4u);
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EXPECT_EQ(ZUtils::round_down_power_of_2(7u), 4u);
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EXPECT_EQ(ZUtils::round_down_power_of_2(8u), 8u);
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EXPECT_EQ(ZUtils::round_down_power_of_2(9u), 8u);
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EXPECT_EQ(ZUtils::round_down_power_of_2(10u), 8u);
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EXPECT_EQ(ZUtils::round_down_power_of_2(1023u), 512u);
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EXPECT_EQ(ZUtils::round_down_power_of_2(1024u), 1024u);
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EXPECT_EQ(ZUtils::round_down_power_of_2(1025u), 1024u);
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const size_t max = max_alignment<size_t>();
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EXPECT_EQ(ZUtils::round_down_power_of_2(max), max);
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EXPECT_EQ(ZUtils::round_down_power_of_2(max - 1), max / 2);
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}
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