{
    static constexpr UInt8 __attribute__((__aligned__(16))) masks[] =
    {
        0,  1,  2,  1,  4,  1,  4,  2,  8,  7,  6,  5,  4,  3,  2,  1, 
        0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 
        0,  1,  0,  1,  0,  1,  0,  1,  0,  1,  0,  1,  0,  1,  0,  1,
        0,  1,  2,  0,  1,  2,  0,  1,  2,  0,  1,  2,  0,  1,  2,  0,
        0,  1,  2,  3,  0,  1,  2,  3,  0,  1,  2,  3,  0,  1,  2,  3,
        0,  1,  2,  3,  4,  0,  1,  2,  3,  4,  0,  1,  2,  3,  4,  0,
        0,  1,  2,  3,  4,  5,  0,  1,  2,  3,  4,  5,  0,  1,  2,  3,
        0,  1,  2,  3,  4,  5,  6,  0,  1,  2,  3,  4,  5,  6,  0,  1,
        0,  1,  2,  3,  4,  5,  6,  7,  0,  1,  2,  3,  4,  5,  6,  7,
        0,  1,  2,  3,  4,  5,  6,  7,  8,  0,  1,  2,  3,  4,  5,  6,
        0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  0,  1,  2,  3,  4,  5,
        0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10,  0,  1,  2,  3,  4,
        0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11,  0,  1,  2,  3,
        0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12,  0,  1,  2,
        0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13,  0,  1,
        0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14,  0,
    };
    unalignedStore<uint8x8_t>(op,
        vtbl2_u8(unalignedLoad<uint8x8x2_t>(match), unalignedLoad<uint8x8_t>(masks + 16 * offset)));
    unalignedStore<uint8x8_t>(op + 8,
        vtbl2_u8(unalignedLoad<uint8x8x2_t>(match), unalignedLoad<uint8x8_t>(masks + 16 * offset + 8)));
    match += masks[offset];
}
#endif
template <> void inline copy<16>(UInt8 * dst, const UInt8 * src) { copy16(dst, src); }