@@ -3,6 +3,7 @@
3{-# LANGUAGE DataKinds #-}
3{-# LANGUAGE DataKinds #-}
4{-# LANGUAGE GADTs #-}
4{-# LANGUAGE GADTs #-}
5{-# LANGUAGE RankNTypes #-}
5{-# LANGUAGE RankNTypes #-}
6+{-# LANGUAGE RecordWildCards #-}
6{-# LANGUAGE TypeOperators #-}
7{-# LANGUAGE TypeOperators #-}
7{-# LANGUAGE TypeFamilies #-}
8{-# LANGUAGE TypeFamilies #-}
8{-# LANGUAGE MultiParamTypeClasses #-}
9{-# LANGUAGE MultiParamTypeClasses #-}
@@ -21,7 +22,11 @@ import Control.Monad.Random ( MonadRandom, getRandom )
21-- import Data.List ( foldl1' )
22-- import Data.List ( foldl1' )
22import Data.Proxy
23import Data.Proxy
23import Data.Serialize
24import Data.Serialize
25+import Data.Singletons.TypeLits
27+#if MIN_VERSION_base(4,9,0)
24import Data.Kind (Type)
28import Data.Kind (Type)
26import qualified Numeric.LinearAlgebra as LA
31import qualified Numeric.LinearAlgebra as LA
27import Numeric.LinearAlgebra.Static
32import Numeric.LinearAlgebra.Static
@@ -29,7 +34,6 @@ import Numeric.LinearAlgebra.Static
29import Grenade.Core
34import Grenade.Core
30import Grenade.Recurrent.Core
35import Grenade.Recurrent.Core
31import Grenade.Layers.Internal.Update
36import Grenade.Layers.Internal.Update
35-- | Long Short Term Memory Recurrent unit
39-- | Long Short Term Memory Recurrent unit
@@ -71,7 +75,7 @@ instance (KnownNat i, KnownNat o) => UpdateLayer (LSTM i o) where
72 -- Run the update function for each group matrix/vector of weights, momentums and gradients.
76 -- Run the update function for each group matrix/vector of weights, momentums and gradients.
73 -- Hmm, maybe the function should be used instead of passing in the learning parameters.
77 -- Hmm, maybe the function should be used instead of passing in the learning parameters.
74− runUpdate lp (LSTM w m) g =
78+ runUpdate LearningParameters {..} (LSTM w m) g =
75 let (wf, wf') = u lstmWf w m g
79 let (wf, wf') = u lstmWf w m g
76 (uf, uf') = u lstmUf w m g
80 (uf, uf') = u lstmUf w m g
77 (bf, bf') = v lstmBf w m g
81 (bf, bf') = v lstmBf w m g
@@ -88,11 +92,11 @@ instance (KnownNat i, KnownNat o) => UpdateLayer (LSTM i o) where
88 -- Utility function for updating with the momentum, gradients, and weights.
92 -- Utility function for updating with the momentum, gradients, and weights.
89 u :: forall x ix out. (KnownNat ix, KnownNat out) => (x -> (L out ix)) -> x -> x -> x -> ((L out ix), (L out ix))
93 u :: forall x ix out. (KnownNat ix, KnownNat out) => (x -> (L out ix)) -> x -> x -> x -> ((L out ix), (L out ix))
90 u e (e -> weights) (e -> momentum) (e -> gradient) =
94 u e (e -> weights) (e -> momentum) (e -> gradient) =
91− descendMatrix (learningRate lp) (learningMomentum lp) (learningRegulariser lp) weights gradient momentum
95+ descendMatrix learningRate learningMomentum learningRegulariser weights gradient momentum
93 v :: forall x ix. (KnownNat ix) => (x -> (R ix)) -> x -> x -> x -> ((R ix), (R ix))
97 v :: forall x ix. (KnownNat ix) => (x -> (R ix)) -> x -> x -> x -> ((R ix), (R ix))
94 v e (e -> weights) (e -> momentum) (e -> gradient) =
98 v e (e -> weights) (e -> momentum) (e -> gradient) =
95− descendVector (learningRate lp) (learningMomentum lp) (learningRegulariser lp) weights gradient momentum
99+ descendVector learningRate learningMomentum learningRegulariser weights gradient momentum
97 -- There's a lot of updates here, so to try and minimise the number of data copies
101 -- There's a lot of updates here, so to try and minimise the number of data copies
98 -- we'll create a mutable bucket for each.
102 -- we'll create a mutable bucket for each.
@@ -133,18 +137,18 @@ instance (KnownNat i, KnownNat o) => RecurrentLayer (LSTM i o) ('D1 i) ('D1 o) w
133 type RecTape (LSTM i o) ('D1 i) ('D1 o) = (R o, R i, R o, R o, R o, R o, R o, R o, R o, R o, R o)
137 type RecTape (LSTM i o) ('D1 i) ('D1 o) = (R o, R i, R o, R o, R o, R o, R o, R o, R o, R o, R o)
134 -- Forward propagation for the LSTM layer.
138 -- Forward propagation for the LSTM layer.
135 -- The size of the cell state is also the size of the output.
139 -- The size of the cell state is also the size of the output.
136− runRecurrentForwards (LSTM lw _) (S1D cell) (S1D input) =
140+ runRecurrentForwards (LSTM (LSTMWeights {..}) _) (S1D cell) (S1D input) =
137 let -- Forget state vector
141 let -- Forget state vector
138− f_s = lstmBf lw + lstmWf lw #> input + lstmUf lw #> cell
142+ f_s = lstmBf + lstmWf #> input + lstmUf #> cell
139 f_t = sigmoid f_s
143 f_t = sigmoid f_s
140 -- Input state vector
144 -- Input state vector
141− i_s = lstmBi lw + lstmWi lw #> input + lstmUi lw #> cell
145+ i_s = lstmBi + lstmWi #> input + lstmUi #> cell
142 i_t = sigmoid i_s
146 i_t = sigmoid i_s
143 -- Output state vector
147 -- Output state vector
144− o_s = lstmBo lw + lstmWo lw #> input + lstmUo lw #> cell
148+ o_s = lstmBo + lstmWo #> input + lstmUo #> cell
145 o_t = sigmoid o_s
149 o_t = sigmoid o_s
146 -- Cell input state vector
150 -- Cell input state vector
147− c_s = lstmBc lw + lstmWc lw #> input
151+ c_s = lstmBc + lstmWc #> input
148 c_x = tanh c_s
152 c_x = tanh c_s
149 -- Cell state
153 -- Cell state
150 c_t = f_t * cell + i_t * c_x
154 c_t = f_t * cell + i_t * c_x
@@ -158,7 +162,7 @@ instance (KnownNat i, KnownNat o) => RecurrentLayer (LSTM i o) ('D1 i) ('D1 o) w
159 -- There's a test version using the AD library without hmatrix in the test
163 -- There's a test version using the AD library without hmatrix in the test
160 -- suite. These should match always.
164 -- suite. These should match always.
161− runRecurrentBackwards (LSTM lw _) (cell, input, f_s, f_t, i_s, i_t, o_s, o_t, c_s, c_x, c_t) (S1D cellGrad) (S1D h_t') =
165+ runRecurrentBackwards (LSTM (LSTMWeights {..}) _) (cell, input, f_s, f_t, i_s, i_t, o_s, o_t, c_s, c_x, c_t) (S1D cellGrad) (S1D h_t') =
162 let -- Reverse Mode AD Derivitives
166 let -- Reverse Mode AD Derivitives
163 c_t' = h_t' * o_t + cellGrad
167 c_t' = h_t' * o_t + cellGrad
@@ -175,8 +179,8 @@ instance (KnownNat i, KnownNat o) => RecurrentLayer (LSTM i o) ('D1 i) ('D1 o) w
175 c_s' = tanh' c_s * c_x'
179 c_s' = tanh' c_s * c_x'
177 -- The derivatives to pass sideways (recurrent) and downwards
181 -- The derivatives to pass sideways (recurrent) and downwards
178− cell' = tr (lstmUf lw) #> f_s' + tr (lstmUo lw) #> o_s' + tr (lstmUi lw) #> i_s' + c_t' * f_t
182+ cell' = tr lstmUf #> f_s' + tr lstmUo #> o_s' + tr lstmUi #> i_s' + c_t' * f_t
179− input' = tr (lstmWf lw) #> f_s' + tr (lstmWo lw) #> o_s' + tr (lstmWi lw) #> i_s' + tr (lstmWc lw) #> c_s'
183+ input' = tr lstmWf #> f_s' + tr lstmWo #> o_s' + tr lstmWi #> i_s' + tr lstmWc #> c_s'
181 -- Calculate the gradient Matricies for the input
185 -- Calculate the gradient Matricies for the input
182 lstmWf' = f_s' `outer` input
186 lstmWf' = f_s' `outer` input
@@ -235,34 +239,44 @@ tanh' :: (Floating a) => a -> a
235tanh' t = 1 - s ^ (2 :: Int) where s = tanh t
239tanh' t = 1 - s ^ (2 :: Int) where s = tanh t
237instance (KnownNat i, KnownNat o) => Serialize (LSTM i o) where
241instance (KnownNat i, KnownNat o) => Serialize (LSTM i o) where
238− put (LSTM lw _) = do
242+ put (LSTM LSTMWeights {..} _) = do
239− u (lstmWf lw)
243+ u lstmWf
240− u (lstmUf lw)
244+ u lstmUf
241− v (lstmBf lw)
245+ v lstmBf
242− u (lstmWi lw)
246+ u lstmWi
243− u (lstmUi lw)
247+ u lstmUi
244− v (lstmBi lw)
248+ v lstmBi
245− u (lstmWo lw)
249+ u lstmWo
246− u (lstmUo lw)
250+ u lstmUo
247− v (lstmBo lw)
251+ v lstmBo
248− u (lstmWc lw)
252+ u lstmWc
249− v (lstmBc lw)
253+ v lstmBc
251− u :: forall a b. (KnownNat a, KnownNat b) => Putter (L b a)
255+ u :: forall a b. (KnownNat a, KnownNat b) => Putter (L b a)
252− u = putListOf put . LA.toList . LA.flatten . extract
256+ u = putListOf put . LA.toList . LA.flatten . extract
253− v :: forall a. (KnownNat a) => Putter (R a)
257+ v :: forall a. (KnownNat a) => Putter (R a)
254− v = putListOf put . LA.toList . extract
258+ v = putListOf put . LA.toList . extract
257− w <- LSTMWeights <$> u <*> u <*> v <*> u <*> u <*> v <*> u <*> u <*> v <*> u <*> v
261+ lstmWf <- u
258− return $ LSTM w (LSTMWeights w0 u0 v0 w0 u0 v0 w0 u0 v0 w0 v0)
272+ return $ LSTM (LSTMWeights {..}) (LSTMWeights w0 u0 v0 w0 u0 v0 w0 u0 v0 w0 v0)
260− u :: forall a b. (KnownNat a, KnownNat b) => Get (L b a)
274+ u :: forall a b. (KnownNat a, KnownNat b) => Get (L b a)
261− u = let f = fromIntegral $ natVal (Proxy :: Proxy a)
275+ u = let f = fromIntegral $ natVal (Proxy :: Proxy a)
262− in maybe (fail "Vector of incorrect size") return . create . LA.reshape f . LA.fromList =<< getListOf get
276+ in maybe (fail "Vector of incorrect size") return . create . LA.reshape f . LA.fromList =<< getListOf get
263− v :: forall a. (KnownNat a) => Get (R a)
277+ v :: forall a. (KnownNat a) => Get (R a)
264− v = maybe (fail "Vector of incorrect size") return . create . LA.fromList =<< getListOf get
278+ v = maybe (fail "Vector of incorrect size") return . create . LA.fromList =<< getListOf get
266− w0 = konst 0
280+ w0 = konst 0
267− u0 = konst 0
281+ u0 = konst 0
268− v0 = konst 0
282+ v0 = konst 0