decoder->SecondFieldHistory[0] and decoder->FirstFieldHistory[0] x
decoder->SecondFieldHistory[0] and decoder->FirstFieldHistory[1] x
decoder->SecondFieldHistory[0] and decoder->FirstFieldHistory[2] <

decoder->SecondFieldHistory[1] and decoder->FirstFieldHistory[0] x
decoder->SecondFieldHistory[1] and decoder->FirstFieldHistory[1] x
decoder->SecondFieldHistory[1] and decoder->FirstFieldHistory[2] <<

decoder->SecondFieldHistory[2] and decoder->FirstFieldHistory[0] x default
decoder->SecondFieldHistory[2] and decoder->FirstFieldHistory[1] x
decoder->SecondFieldHistory[2] and decoder->FirstFieldHistory[2] x