// ----------------------------------------------------------------------------
// Unit test for the file core/math/BitTweak.h
// ----------------------------------------------------------------------------
#include "precompiled_unittests_core.h"

#include "core/math/BitTweak.h"

namespace ITF
{

TEST(BitTweak, test_countLeadingZero)
{
    EXPECT_EQ(2U, BitTweak::countLeadingZero(0x36A70D03));
    EXPECT_EQ(1U, BitTweak::countLeadingZero(0x5D430A16));
    EXPECT_EQ(4U, BitTweak::countLeadingZero(0x0C5A5D10));
    EXPECT_EQ(0U, BitTweak::countLeadingZero(0x848113FB));
    EXPECT_EQ(1U, BitTweak::countLeadingZero(0x63E19535));
    EXPECT_EQ(0U, BitTweak::countLeadingZero(0xC7F2527A));
    EXPECT_EQ(32U, BitTweak::countLeadingZero(0));
}


TEST(BitTweak, test_countBits)
{
    EXPECT_EQ(0U, BitTweak::countBits(0));
    EXPECT_EQ(4U, BitTweak::countBits<i8>(0x1D));
    EXPECT_EQ(16U, BitTweak::countBits<i16>(-1));
    EXPECT_EQ(9U, BitTweak::countBits<u16>(0x36A7));
    EXPECT_EQ(12U, BitTweak::countBits<i32>(0x2D430A16));
    EXPECT_EQ(16U, BitTweak::countBits<u32>(0x63E19535U));
    EXPECT_EQ(26U, BitTweak::countBits<u64>(0x848113FB0C5A5D10));
}

} // namespace ITF