def call(self, inputs, state, att_score=None):
"""Gated recurrent unit (GRU) with nunits cells."""
if self._gate_linear is None:
bias_ones = self._bias_initializer
if self._bias_initializer is None:
bias_ones = init_ops.constant_initializer(
1.0, dtype=inputs.dtype)
with vs.variable_scope("gates"): # Reset gate and update gate.
self._gate_linear = _Linear(
[inputs, state],
2 * self._num_units,
True,
bias_initializer=bias_ones,
kernel_initializer=self._kernel_initializer)
value = math_ops.sigmoid(self._gate_linear([inputs, state]))
r, u = array_ops.split(value=value, num_or_size_splits=2, axis=1)
r_state = r * state
if self._candidate_linear is None:
with vs.variable_scope("candidate"):
self._candidate_linear = _Linear(
[inputs, r_state],
self._num_units,
True,
bias_initializer=self._bias_initializer,
kernel_initializer=self._kernel_initializer)
c = self._activation(self._candidate_linear([inputs, r_state]))
u = (1.0 - att_score) * u
new_h = u * state + (1 - u) * c
return new_h, new_h
def call(self, inputs, state, att_score=None):
"""Gated recurrent unit (GRU) with nunits cells."""
if self._gate_linear is None:
bias_ones = self._bias_initializer
if self._bias_initializer is None:
bias_ones = init_ops.constant_initializer(1.0,
dtype=inputs.dtype)
with vs.variable_scope("gates"): # Reset gate and update gate.
self._gate_linear = _Linear(
[inputs, state],
2 * self._num_units,
True,
bias_initializer=bias_ones,
kernel_initializer=self._kernel_initializer)
value = math_ops.sigmoid(self._gate_linear([inputs, state]))
r, u = array_ops.split(value=value, num_or_size_splits=2, axis=1)
r_state = r * state
if self._candidate_linear is None:
with vs.variable_scope("candidate"):
self._candidate_linear = _Linear(
[inputs, r_state],
self._num_units,
True,
bias_initializer=self._bias_initializer,
kernel_initializer=self._kernel_initializer)
c = self._activation(self._candidate_linear([inputs, r_state]))
new_h = (1. - att_score) * state + att_score * c
return new_h, new_h
def call(self, inputs, state, att_score=None):
if self._gate_linear is None:
bias_ones = self._bias_initializer
if self._bias_initializer is None:
bias_ones = init_ops.constant_initializer(1.0,
dtype=inputs.dtype)
with vs.variable_scope("gates"):
self._gate_linear = _Linear(
[inputs, state],
2 * self._num_units,
True,
bias_initializer=bias_ones,
kernel_initializer=self._kernel_initializer)
value = math_ops.sigmoid(self._gate_linear([inputs, state]))
r, u = array_ops.split(value, num_or_size_splits=2, axis=1)
r_state = r * state
if self._candidate_linear is None:
with vs.variable_scope("candidate"):
self._candidate_linear = _Linear(
[inputs, r_state],
self._num_units,
True,
bias_initializer=self._bias_initializer,
kernel_initializer=self._kernel_initializer)
c = self._activation(self._candidate_linear([inputs, r_state]))
u = (1.0 - att_score) * u
new_h = u * state + (1 - u) * c
return new_h, new_h
def call(self, inputs, state):
def replace_w(x):
if x.op.name.endswith('kernel'):
return bit_utils.quantize_w(tf.tanh(x), bit=self._w_bit)
else:
return x
with bit_utils.replace_variable(replace_w):
sigmoid = tf.sigmoid
# Parameters of gates are concatenated into one multiply for
# efficiency.
if self._state_is_tuple:
c, h = state
else:
c, h = tf.split(value=state, num_or_size_splits=2, axis=1)
if self._linear is None:
# self._linear = rnn_cell_impl._Linear(
self._linear = core_rnn_cell._Linear(
[inputs, h], 4 * self._num_units, True)
# i = input_gate, j = new_input, f = forget_gate, o = output_gate
i, j, f, o = tf.split(
value=self._linear([inputs, h]), num_or_size_splits=4, axis=1)
new_c = (
c * sigmoid(f + self._forget_bias) + sigmoid(i) * self._activation(j))
new_h = bit_utils.round_bit(self._activation(
new_c) * sigmoid(o), bit=self._f_bit)
if self._state_is_tuple:
new_state = tf.contrib.rnn.LSTMStateTuple(new_c, new_h)
else:
new_state = tf.concat([new_c, new_h], 1)
return new_h, new_state
def call(self, inputs, state):
def replace_w(x):
if x.op.name.endswith('kernel'):
return bit_utils.quantize_w(tf.tanh(x), bit=self._w_bit)
else:
return x
with bit_utils.replace_variable(replace_w):
if self._gate_linear is None:
bias_ones = self._bias_initializer
if self._bias_initializer is None:
bias_ones = tf.constant_initializer(
1.0, dtype=inputs.dtype)
with tf.variable_scope("gates"): # Reset gate and update gate.
# self._gate_linear = rnn_cell_impl._Linear(
self._gate_linear = core_rnn_cell._Linear(
[inputs, state],
2 * self._num_units,
True,
bias_initializer=bias_ones,
kernel_initializer=self._kernel_initializer)
value = tf.sigmoid(self._gate_linear([inputs, state]))
r, u = tf.split(value=value, num_or_size_splits=2, axis=1)
r_state = bit_utils.round_bit(r * state, bit=self._f_bit)
if self._candidate_linear is None:
with tf.variable_scope("candidate"):
# self._candidate_linear = rnn_cell_impl._Linear(
self._candidate_linear = core_rnn_cell._Linear(
[inputs, r_state],
self._num_units,
True,
bias_initializer=self._bias_initializer,
kernel_initializer=self._kernel_initializer)
c = self._activation(self._candidate_linear([inputs, r_state]))
c = bit_utils.round_bit(c, bit=self._f_bit)
new_h = bit_utils.round_bit(
u * state + (1 - u) * c, bit=self._f_bit)
return new_h, new_h
def __call__(self, inputs, state, scope=None):
num_proj = self._num_units if self._num_proj is None else self._num_proj
sigmoid = math_ops.sigmoid
if self._state_is_tuple:
(c_prev, m_prev) = state
else:
c_prev = array_ops.slice(state, [0, 0], [-1, self._num_units])
m_prev = array_ops.slice(state, [0, self._num_units],
[-1, num_proj])
dtype = inputs.dtype
input_size = inputs.get_shape().with_rank(2)[1]
if input_size.value is None:
raise ValueError(
"Could not infer input size from inputs.get_shape()[-1]")
if self._linear1 is None:
scope = vs.get_variable_scope()
with vs.variable_scope(
scope, initializer=self._initializer) as unit_scope:
if self._num_unit_shards is not None:
unit_scope.set_partitioner(
partitioned_variables.fixed_size_partitioner(
self._num_unit_shards))
self._linear1 = _Linear([inputs, m_prev], 5 * self._num_units,
True)
# i = input_gate, j = new_input, f = forget_gate, o = output_gate
lstm_matrix = self._linear1([inputs, m_prev])
i, j, f, o, g = array_ops.split(value=lstm_matrix,
num_or_size_splits=5,
axis=1)
with tf.variable_scope("highway"):
k = array_ops.split(value=_linear([inputs], self._num_units, True),
num_or_size_splits=1,
axis=1)
# Diagonal connections
if self._use_peepholes and not self._w_f_diag:
scope = vs.get_variable_scope()
with vs.variable_scope(
scope, initializer=self._initializer) as unit_scope:
with vs.variable_scope(unit_scope):
self._w_f_diag = vs.get_variable("w_f_diag",
shape=[self._num_units],
dtype=dtype)
self._w_i_diag = vs.get_variable("w_i_diag",
shape=[self._num_units],
dtype=dtype)
self._w_o_diag = vs.get_variable("w_o_diag",
shape=[self._num_units],
dtype=dtype)
if self._use_peepholes:
c = (sigmoid(f + self._forget_bias + self._w_f_diag * c_prev) *
c_prev +
sigmoid(i + self._w_i_diag * c_prev) * self._activation(j))
else:
c = (sigmoid(f + self._forget_bias) * c_prev +
sigmoid(i) * self._activation(j))
if self._cell_clip is not None:
# pylint: disable=invalid-unary-operand-type
c = clip_ops.clip_by_value(c, -self._cell_clip, self._cell_clip)
# pylint: enable=invalid-unary-operand-type
if self._use_peepholes:
sigmoidg = sigmoid(g)
su = 1. - sigmoidg
m = sigmoidg * sigmoid(o + self._w_o_diag * c) * self._activation(
c) + tf.squeeze(su * k, axis=0)
else:
sigmoidg = sigmoid(g)
su = 1. - sigmoidg
m = sigmoidg * sigmoid(o) * self._activation(c) + tf.squeeze(
su * k, axis=0)
if self._num_proj is not None:
if self._linear2 is None:
scope = vs.get_variable_scope()
with vs.variable_scope(scope, initializer=self._initializer):
with vs.variable_scope("projection") as proj_scope:
if self._num_proj_shards is not None:
proj_scope.set_partitioner(
partitioned_variables.fixed_size_partitioner(
self._num_proj_shards))
self._linear2 = _Linear(m, self._num_proj, False)
m = self._linear2(m)
if self._proj_clip is not None:
# pylint: disable=invalid-unary-operand-type
m = clip_ops.clip_by_value(m, -self._proj_clip,
self._proj_clip)
# pylint: enable=invalid-unary-operand-type
new_state = (LSTMStateTuple(c, m)
if self._state_is_tuple else array_ops.concat([c, m], 1))
return m, new_state
def call(self, inputs, state, att_score=None):
time_now_score = tf.expand_dims(inputs[:,-1], -1)
time_last_score = tf.expand_dims(inputs[:,-2], -1)
inputs = inputs[:,:-2]
inputs = inputs * att_score
num_proj = self._num_units if self._num_proj is None else self._num_proj
sigmoid = math_ops.sigmoid
if self._state_is_tuple:
(c_prev, m_prev) = state
else:
c_prev = array_ops.slice(state, [0, 0], [-1, self._num_units])
m_prev = array_ops.slice(state, [0, self._num_units], [-1, num_proj])
dtype = inputs.dtype
input_size = inputs.get_shape().with_rank(2)[1]
if input_size.value is None:
raise ValueError("Could not infer input size from inputs.get_shape()[-1]")
if self._time_kernel_w1 is None:
scope = vs.get_variable_scope()
with vs.variable_scope(
scope, initializer=self._initializer) as unit_scope:
with vs.variable_scope(unit_scope):
self._time_input_w1 = vs.get_variable(
"_time_input_w1", shape=[self._num_units], dtype=dtype)
self._time_input_bias1 = vs.get_variable(
"_time_input_bias1", shape=[self._num_units], dtype=dtype)
self._time_input_w2 = vs.get_variable(
"_time_input_w2", shape=[self._num_units], dtype=dtype)
self._time_input_bias2 = vs.get_variable(
"_time_input_bias2", shape=[self._num_units], dtype=dtype)
self._time_kernel_w1 = vs.get_variable(
"_time_kernel_w1", shape=[input_size, self._num_units], dtype=dtype)
self._time_kernel_t1 = vs.get_variable(
"_time_kernel_t1", shape=[self._num_units, self._num_units], dtype=dtype)
self._time_bias1 = vs.get_variable(
"_time_bias1", shape=[self._num_units], dtype=dtype)
self._time_kernel_w2 = vs.get_variable(
"_time_kernel_w2", shape=[input_size, self._num_units], dtype=dtype)
self._time_kernel_t2 = vs.get_variable(
"_time_kernel_t2", shape=[self._num_units, self._num_units], dtype=dtype)
self._time_bias2 = vs.get_variable(
"_time_bias2", shape=[self._num_units], dtype=dtype)
self._o_kernel_t1 = vs.get_variable(
"_o_kernel_t1", shape=[self._num_units, self._num_units], dtype=dtype)
self._o_kernel_t2 = vs.get_variable(
"_o_kernel_t2", shape=[self._num_units, self._num_units], dtype=dtype)
time_now_input = tf.nn.tanh(time_now_score * self._time_input_w1 + self._time_input_bias1)
time_last_input = tf.nn.tanh(time_last_score * self._time_input_w2 + self._time_input_bias2)
time_now_state = math_ops.matmul(inputs, self._time_kernel_w1) + math_ops.matmul(time_now_input, self._time_kernel_t1) + self._time_bias1
time_last_state = math_ops.matmul(inputs, self._time_kernel_w2) + math_ops.matmul(time_last_input, self._time_kernel_t2) + self._time_bias2
if self._linear1 is None:
scope = vs.get_variable_scope()
with vs.variable_scope(
scope, initializer=self._initializer) as unit_scope:
if self._num_unit_shards is not None:
unit_scope.set_partitioner(
partitioned_variables.fixed_size_partitioner(
self._num_unit_shards))
self._linear1 = _Linear([inputs, m_prev], 4 * self._num_units, True)
# i = input_gate, j = new_input, f = forget_gate, o = output_gate
lstm_matrix = self._linear1([inputs, m_prev])
i, j, f, o = array_ops.split(
value=lstm_matrix, num_or_size_splits=4, axis=1)
o = o + math_ops.matmul(time_now_input, self._o_kernel_t1) + math_ops.matmul(time_last_input, self._o_kernel_t2)
# Diagonal connections
if self._use_peepholes and not self._w_f_diag:
scope = vs.get_variable_scope()
with vs.variable_scope(
scope, initializer=self._initializer) as unit_scope:
with vs.variable_scope(unit_scope):
self._w_f_diag = vs.get_variable(
"w_f_diag", shape=[self._num_units], dtype=dtype)
self._w_i_diag = vs.get_variable(
"w_i_diag", shape=[self._num_units], dtype=dtype)
self._w_o_diag = vs.get_variable(
"w_o_diag", shape=[self._num_units], dtype=dtype)
if self._use_peepholes:
c = (sigmoid(f + self._forget_bias + self._w_f_diag * c_prev) * sigmoid(time_last_state) * c_prev +
sigmoid(i + self._w_i_diag * c_prev) * sigmoid(time_now_state) * self._activation(j))
else:
c = (sigmoid(f + self._forget_bias) * sigmoid(time_last_state) * c_prev + sigmoid(i) * sigmoid(time_now_state) * self._activation(j))
if self._cell_clip is not None:
# pylint: disable=invalid-unary-operand-type
c = clip_ops.clip_by_value(c, -self._cell_clip, self._cell_clip)
# pylint: enable=invalid-unary-operand-type
if self._use_peepholes:
m = sigmoid(o + self._w_o_diag * c) * self._activation(c)
else:
m = sigmoid(o) * self._activation(c)
if self._num_proj is not None:
if self._linear2 is None:
scope = vs.get_variable_scope()
with vs.variable_scope(scope, initializer=self._initializer):
with vs.variable_scope("projection") as proj_scope:
if self._num_proj_shards is not None:
proj_scope.set_partitioner(
partitioned_variables.fixed_size_partitioner(
self._num_proj_shards))
self._linear2 = _Linear(m, self._num_proj, False)
m = self._linear2(m)
if self._proj_clip is not None:
# pylint: disable=invalid-unary-operand-type
m = clip_ops.clip_by_value(m, -self._proj_clip, self._proj_clip)
# pylint: enable=invalid-unary-operand-type
new_state = (LSTMStateTuple(c, m) if self._state_is_tuple else
array_ops.concat([c, m], 1))
return m, new_state
