protected override void _prepare_local(DeviceDType device_dtype,
Dictionary <DeviceDType, Dictionary <string, Tensor> > _apply_state)
{
base._prepare_local(device_dtype, _apply_state);
_apply_state[device_dtype]["momentum"] = array_ops.identity(
_get_hyper("momentum", device_dtype.DType));
}
protected override void _prepare_local(DeviceDType device_dtype, Dictionary <DeviceDType, Dictionary <string, Tensor> > _apply_state)
{
base._prepare_local(device_dtype, _apply_state);
var rho = array_ops.identity(_get_hyper("rho", device_dtype.DType));
_apply_state[device_dtype]["neg_lr_t"] = -_apply_state[device_dtype]["lr_t"];
_apply_state[device_dtype]["epsilon"] = ops.convert_to_tensor(args.Epsilon, dtype: device_dtype.DType);
_apply_state[device_dtype]["rho"] = rho;
_apply_state[device_dtype]["momentum"] = array_ops.identity(_get_hyper("momentum", device_dtype.DType));
_apply_state[device_dtype]["one_minus_rho"] = 1.0f - rho;
}
protected override void _prepare_local(DeviceDType device_dtype, Dictionary <DeviceDType, Dictionary <string, Tensor> > apply_state)
{
base._prepare_local(device_dtype, apply_state);
var var_dtype = device_dtype.DType;
var var_device = device_dtype.Device;
var local_step = math_ops.cast(iterations + 1, var_dtype);
var beta_1_t = array_ops.identity(_get_hyper("beta_1", var_dtype));
var beta_2_t = array_ops.identity(_get_hyper("beta_2", var_dtype));
var beta_1_power = math_ops.pow(beta_1_t, local_step);
var beta_2_power = math_ops.pow(beta_2_t, local_step);
var lr = apply_state[device_dtype]["lr_t"] * (math_ops.sqrt(1 - beta_2_power) / (1 - beta_1_power));
// update state
apply_state[device_dtype]["lr"] = lr;
apply_state[device_dtype]["epsilon"] = ops.convert_to_tensor(epsilon);
apply_state[device_dtype]["beta_1_t"] = beta_1_t;
apply_state[device_dtype]["beta_1_power"] = beta_1_power;
apply_state[device_dtype]["one_minus_beta_1_t"] = 1 - beta_1_t;
apply_state[device_dtype]["beta_2_t"] = beta_2_t;
apply_state[device_dtype]["beta_2_power"] = beta_2_power;
apply_state[device_dtype]["one_minus_beta_2_t"] = 1 - beta_2_t;
}