in cuda/lltm.py [0:0]
def forward(ctx, input, weights, bias, old_h, old_cell):
outputs = lltm_cuda.forward(input, weights, bias, old_h, old_cell)
new_h, new_cell = outputs[:2]
variables = outputs[1:] + [weights]
ctx.save_for_backward(*variables)
return new_h, new_cell