Eccelerators.BitTwiddling

tests/permutation/BitPermutationTest.lvt

namespace Eccelerators.BitTwiddling.Tests.Permutation

using Eccelerators.BitTwiddling.Permutation

@Test
component BitPermutationTest
{
    @Test
    fn TestReverse32()
    {
        assert BitPermutation.Reverse32(0) == (0 as uint)
        assert BitPermutation.Reverse32(1) == (0x80000000 as uint)
        assert BitPermutation.Reverse32(0xAAAAAAAA) == (0x55555555 as uint)
        assert BitPermutation.Reverse32(0x01234567) == (0xE6A2C480 as uint)
        var reversed: uint = BitPermutation.Reverse32(0x12345678)
        assert BitPermutation.Reverse32(reversed) == (0x12345678 as uint)
    }

    @Test
    fn TestReverseByteAndByteSwap()
    {
        assert BitPermutation.ReverseByte(0x00) == 0x00
        assert BitPermutation.ReverseByte(0x01) == 0x80
        assert BitPermutation.ReverseByte(0x96) == 0x69
        assert BitPermutation.ByteSwap32(0x12345678) == (0x78563412 as uint)
        assert BitPermutation.ByteSwap32(0xAABBCCDD) == (0xDDCCBBAA as uint)
    }

    @Test
    fn TestRotations()
    {
        assert BitPermutation.RotateLeft32(0x80000001, 1) == (0x00000003 as uint)
        assert BitPermutation.RotateRight32(0x80000001, 1) == (0xC0000000 as uint)
        assert BitPermutation.RotateLeft32(0x12345678, 0) == (0x12345678 as uint)
        assert BitPermutation.RotateRight32(0x12345678, 32) == (0x12345678 as uint)
        assert BitPermutation.RotateLeft32(0x12345678, -1) == (0x12345678 as uint)
    }
}