gmwrite $lm0v $ly0; gbfn $lm0v $lr128v
gmwrite $lm8v $ly4; gbfn $lm8v $lr136v
gmread $ly0 $lr0v; gmwrite $lr128v $lx0
gbfn $mreadf $lr0v; gmread $ly4 $ls0v; gmwrite $lr136v $lx4
gbfn $mreadf $ls0v
gmmul $lx $lr0v $ln0v
gmmul $lx $ls0v $ln8v