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// Copyright 2014 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include <gtest/gtest.h>
#include "Common/MathUtil.h"
TEST(MathUtil, Clamp)
{
EXPECT_EQ(1, MathUtil::Clamp(1, 0, 2));
EXPECT_EQ(1.0, MathUtil::Clamp(1.0, 0.0, 2.0));
EXPECT_EQ(2, MathUtil::Clamp(4, 0, 2));
EXPECT_EQ(2.0, MathUtil::Clamp(4.0, 0.0, 2.0));
EXPECT_EQ(0, MathUtil::Clamp(-1, 0, 2));
EXPECT_EQ(0.0, MathUtil::Clamp(-1.0, 0.0, 2.0));
}
TEST(MathUtil, IntLog2)
{
EXPECT_EQ(0, IntLog2(1));
EXPECT_EQ(1, IntLog2(2));
EXPECT_EQ(2, IntLog2(4));
EXPECT_EQ(3, IntLog2(8));
EXPECT_EQ(63, IntLog2(0x8000000000000000ull));
// Rounding behavior.
EXPECT_EQ(3, IntLog2(15));
EXPECT_EQ(63, IntLog2(0xFFFFFFFFFFFFFFFFull));
}
TEST(MathUtil, NextPowerOf2)
{
EXPECT_EQ(4U, MathUtil::NextPowerOf2(3));
EXPECT_EQ(4U, MathUtil::NextPowerOf2(4));
EXPECT_EQ(8U, MathUtil::NextPowerOf2(6));
EXPECT_EQ(0x40000000U, MathUtil::NextPowerOf2(0x23456789));
}
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