clean up obsolete files

13 files changed, 16 insertions, 874 deletions

diff --git a/nerv/Makefile b/nerv/Makefile
index ee4b9c0..c0db53a 100644
--- a/nerv/Makefile
+++ b/nerv/Makefile
@@ -7,7 +7,7 @@ INC_PATH := $(LUA_BINDIR)/../include/nerv
 LUA_DIR = $(INST_LUADIR)/nerv
 OBJ_DIR := $(BUILD_DIR)/objs
 ISUBDIR := io matrix luaT
-SUBDIR := matrix io layer examples nn lib/io lib/luaT lib/matrix tnn/layersT
+SUBDIR := matrix io layer examples nn tnn lib/io lib/luaT lib/matrix
 
 INC_SUBDIR := $(addprefix $(INC_PATH)/,$(ISUBDIR))
 OBJ_SUBDIR := $(addprefix $(OBJ_DIR)/,$(SUBDIR))
@@ -31,12 +31,11 @@ OBJS := $(CORE_OBJS) $(NERV_OBJS) $(LUAT_OBJS)
 LIBS := $(INST_LIBDIR)/libnerv.so $(LIB_PATH)/libnervcore.so $(LIB_PATH)/libluaT.so
 LUA_LIBS := matrix/init.lua io/init.lua init.lua \
 			layer/init.lua layer/affine.lua layer/sigmoid.lua layer/tanh.lua layer/softmax_ce.lua layer/softmax.lua \
-			layer/window.lua layer/bias.lua layer/combiner.lua layer/mse.lua layer/affine_recurrent.lua \
-			layer/elem_mul.lua layer/gate_fff.lua layer/lstm.lua layer/lstm_gate.lua layer/dropout.lua layer/gru.lua \
+			layer/window.lua layer/bias.lua layer/combiner.lua layer/mse.lua \
+			layer/elem_mul.lua layer/lstm.lua layer/lstm_gate.lua layer/dropout.lua layer/gru.lua \
 			nn/init.lua nn/layer_repo.lua nn/param_repo.lua nn/layer_dag.lua \
 			io/sgd_buffer.lua \
-			tnn/init.lua tnn/layer_dag_t.lua tnn/sutil.lua tnn/tnn.lua \
-			tnn/layersT/dropout_t.lua tnn/layersT/lstm_t.lua tnn/layersT/gru_t.lua tnn/layersT/softmax_ce_t.lua
+			tnn/init.lua tnn/sutil.lua tnn/tnn.lua
 
 INCLUDE := -I $(LUA_INCDIR) -DLUA_USE_APICHECK
 #CUDA_BASE := /usr/local/cuda-7.0
diff --git a/nerv/layer/affine_recurrent.lua b/nerv/examples/lmptb/lmptb/layer/affine_recurrent.lua
index fd6f38f..fd6f38f 100644
--- a/nerv/layer/affine_recurrent.lua
+++ b/nerv/examples/lmptb/lmptb/layer/affine_recurrent.lua
diff --git a/nerv/examples/lmptb/lmptb/layer/init.lua b/nerv/examples/lmptb/lmptb/layer/init.lua
index ceae009..e20e2dc 100644
--- a/nerv/examples/lmptb/lmptb/layer/init.lua
+++ b/nerv/examples/lmptb/lmptb/layer/init.lua
@@ -1,4 +1,5 @@
 require 'lmptb.layer.select_linear'
+require 'lmptb.layer.affine_recurrent'
 require 'lmptb.layer.affine_recurrent_plusvec'
 --require 'lmptb.layer.gru_t'
 require 'lmptb.layer.lm_affine_recurrent'
diff --git a/nerv/layer/gate_fff.lua b/nerv/layer/gate_fff.lua
deleted file mode 100644
index 6082e27..0000000
--- a/nerv/layer/gate_fff.lua
+++ /dev/null
@@ -1,73 +0,0 @@
-local GateFFFLayer = nerv.class('nerv.GateFLayer', 'nerv.Layer') --Full matrix gate
-
-function GateFFFLayer:__init(id, global_conf, layer_conf)
-    self.id = id
-    self.dim_in = layer_conf.dim_in
-    self.dim_out = layer_conf.dim_out
-    self.gconf = global_conf
-
-    for i = 1, #self.dim_in do
-        self["ltp" .. i] = self:find_param("ltp" .. i, layer_conf, global_conf, nerv.LinearTransParam, {self.dim_in[i], self.dim_out[1]}) --layer_conf.ltp
-    end
-    self.bp = self:find_param("bp", layer_conf, global_conf, nerv.BiasParam, {1, self.dim_out[1]})--layer_conf.bp
-  
-    self:check_dim_len(-1, 1) --accept multiple inputs
-end
-
-function GateFFFLayer:init(batch_size)
-    for i = 1, #self.dim_in do
-        if self["ltp" .. i].trans:ncol() ~= self.bp.trans:ncol() then
-            nerv.error("mismatching dimensions of linear transform and bias paramter")
-        end
-        if self.dim_in[i] ~= self["ltp" .. i].trans:nrow() then
-            nerv.error("mismatching dimensions of linear transform parameter and input")
-        end
-        self["ltp"..i]:train_init()
-    end
-    
-    if self.dim_out[1] ~= self.ltp1.trans:ncol() then
-        nerv.error("mismatching dimensions of linear transform parameter and output")
-    end
-    self.bp:train_init()
-    self.err_bakm = self.gconf.cumat_type(batch_size, self.dim_out[1])
-end
-
-function GateFFFLayer:batch_resize(batch_size)
-    if self.err_m:nrow() ~= batch_size then
-        self.err_bakm = self.gconf.cumat_type(batch_size, self.dim_out[1])
-    end
-end
-
-function GateFFFLayer:propagate(input, output)
-    -- apply linear transform
-    output[1]:mul(input[1], self.ltp1.trans, 1.0, 0.0, 'N', 'N')
-    for i = 2, #self.dim_in do
-        output[1]:mul(input[i], self["ltp" .. i].trans, 1.0, 1.0, 'N', 'N')
-    end
-    -- add bias
-    output[1]:add_row(self.bp.trans, 1.0)
-    output[1]:sigmoid(output[1])
-end
-
-function GateFFFLayer:back_propagate(bp_err, next_bp_err, input, output)
-    self.err_bakm:sigmoid_grad(bp_err[1], output[1])
-    for i = 1, #self.dim_in do
-        next_bp_err[i]:mul(self.err_bakm, self["ltp" .. i].trans, 1.0, 0.0, 'N', 'T')
-    end
-end
-
-function GateFFFLayer:update(bp_err, input, output)
-    self.err_bakm:sigmoid_grad(bp_err[1], output[1])
-    for i = 1, #self.dim_in do
-        self["ltp" .. i]:update_by_err_input(self.err_bakm, input[i])
-    end
-    self.bp:update_by_gradient(self.err_bakm:colsum())
-end
-
-function GateFFFLayer:get_params()
-    local pr = nerv.ParamRepo({self.bp})
-    for i = 1, #self.dim_in do
-        pr:add(self["ltp" .. i].id, self["ltp" .. i])
-    end 
-    return pr
-end
diff --git a/nerv/layer/gru.lua b/nerv/layer/gru.lua
index 2162e28..e81d21a 100644
--- a/nerv/layer/gru.lua
+++ b/nerv/layer/gru.lua
@@ -48,7 +48,7 @@ function GRULayer:__init(id, global_conf, layer_conf)
         ["nerv.TanhLayer"] = {
             [ap("mainTanhL")] = {{}, {dim_in = {dout1}, dim_out = {dout1}}},
         },
-        ["nerv.GateFLayer"] = {
+        ["nerv.LSTMGateLayer"] = {
             [ap("resetGateL")] = {{}, {dim_in = {din1, din2},
                                        dim_out = {din2},
                                        pr = pr}},
diff --git a/nerv/layer/init.lua b/nerv/layer/init.lua
index 6b7a1d7..54f33ae 100644
--- a/nerv/layer/init.lua
+++ b/nerv/layer/init.lua
@@ -109,11 +109,16 @@ nerv.include('bias.lua')
 nerv.include('window.lua')
 nerv.include('mse.lua')
 nerv.include('combiner.lua')
-nerv.include('affine_recurrent.lua')
 nerv.include('softmax.lua')
 nerv.include('elem_mul.lua')
-nerv.include('gate_fff.lua')
 nerv.include('lstm.lua')
 nerv.include('lstm_gate.lua')
 nerv.include('dropout.lua')
 nerv.include('gru.lua')
+
+-- The following lines are for backward compatibility, and will be removed in
+-- the future. The use of these names are deprecated.
+nerv.DropoutLayerT = nerv.DropoutLayer
+nerv.GRULayerT = nerv.GRULayer
+nerv.LSTMLayerT = nerv.LSTMLayer
+nerv.SoftmaxCELayerT = nerv.SoftmaxCELayer
diff --git a/nerv/nn/layer_repo.lua b/nerv/nn/layer_repo.lua
index 2f8de08..3d3a79f 100644
--- a/nerv/nn/layer_repo.lua
+++ b/nerv/nn/layer_repo.lua
@@ -9,6 +9,9 @@ function LayerRepo:add_layers(layer_spec, param_repo, global_conf)
     local layers = self.layers
     for ltype, llist in pairs(layer_spec) do
         local layer_type = nerv.get_type(ltype)
+        if layer_type == nil then
+            nerv.error('layer type `%s` not found', ltype)
+        end
         for id, spec in pairs(llist) do
             if layers[id] ~= nil then
                 nerv.error("a layer with id %s already exists", id)
diff --git a/nerv/tnn/init.lua b/nerv/tnn/init.lua
index 7faca31..44ce26b 100644
--- a/nerv/tnn/init.lua
+++ b/nerv/tnn/init.lua
@@ -45,8 +45,3 @@ end
 
 nerv.include('sutil.lua')
 nerv.include('tnn.lua')
-nerv.include('layersT/softmax_ce_t.lua')
-nerv.include('layersT/lstm_t.lua')
-nerv.include('layersT/gru_t.lua')
-nerv.include('layersT/dropout_t.lua')
-nerv.include('layer_dag_t.lua')
diff --git a/nerv/tnn/layer_dag_t.lua b/nerv/tnn/layer_dag_t.lua
deleted file mode 100644
index b651f4e..0000000
--- a/nerv/tnn/layer_dag_t.lua
+++ /dev/null
@@ -1,386 +0,0 @@
-local DAGLayerT = nerv.class("nerv.DAGLayerT", "nerv.LayerT")
-
-local function parse_id(str)
-    local id, port, _
-    _, _, id, port = string.find(str, "([a-zA-Z0-9_.]+)%[([0-9]+)%]")
-    if id == nil or port == nil then
-        _, _, id, port = string.find(str, "(.+)%[([0-9]+)%]")
-        if not (id == "<input>" or id == "<output>") then
-            nerv.error("wrong format of connection id")
-        end
-    end
-    port = tonumber(port)
-    return id, port
-end
-
-local function discover(id, layers, layer_repo)
-    local ref = layers[id]
-    if id == "<input>" or id == "<output>" then
-        return nil
-    end
-    if ref == nil then
-        local layer = layer_repo:get_layer(id)
-        local dim_in, dim_out = layer:get_dim()
-        ref = {
-            id = layer.id, 
-            layer = layer,
-            inputs = {},
-            outputs = {},
-            err_inputs = {},
-            err_outputs = {},
-            next_layers = {},
-            input_len = #dim_in,
-            output_len = #dim_out,
-            in_deg = 0,
-            visited = false
-        }
-        layers[id] = ref
-    end
-    return ref
-end
-
-function DAGLayerT:__init(id, global_conf, layer_conf)
-    local layers = {}
-    local inputs = {}
-    local outputs = {}
-    local dim_in = layer_conf.dim_in
-    local dim_out = layer_conf.dim_out
-    local parsed_conn = {}
-    for from, to in pairs(layer_conf.connections) do
-        local id_from, port_from = parse_id(from)
-        local id_to, port_to = parse_id(to)
-        local ref_from = discover(id_from, layers, layer_conf.sub_layers)
-        local ref_to = discover(id_to, layers, layer_conf.sub_layers)
-        local input_dim, output_dim, _
-        if id_from == "<input>" then
-            input_dim, _ = ref_to.layer:get_dim()
-            if dim_in[port_from] ~= input_dim[port_to] then
-                nerv.error("mismatching data dimension between %s and %s", from, to)
-            end
-            inputs[port_from] = {ref_to, port_to}
-            if ref_to.inputs[1] == nil then
-               ref_to.inputs[1] = {}
-            end
-            if ref_to.inputs[1][port_to] ~= nil then
-                nerv.error("port(%d) for layer(%s) already attached", port_to, to)
-            end
-            ref_to.inputs[1][port_to] = inputs -- just a place holder
-        elseif id_to == "<output>" then
-            _, output_dim = ref_from.layer:get_dim()
-            if output_dim[port_from] ~= dim_out[port_to] then
-                nerv.error("mismatching data dimension between %s and %s", from, to)
-            end
-            outputs[port_to] = {ref_from, port_from}
-            if ref_from.outputs[1] == nil then
-                ref_from.outputs[1] = {}
-            end
-            if ref_from.outputs[1][port_from] ~= nil then
-                nerv.error("port(%d) for layer(%s) already attached", port_from, from)
-            end
-            ref_from.outputs[1] = {}
-            ref_from.outputs[1][port_from] = outputs -- just a place holder
-        else
-            _, output_dim = ref_from.layer:get_dim()
-            input_dim, _ = ref_to.layer:get_dim()
-            if output_dim[port_from] ~= input_dim[port_to] then
-                nerv.error("mismatching data dimension between %s and %s", from, to)
-            end
-
-            table.insert(parsed_conn,
-            {{ref_from, port_from}, {ref_to, port_to}})
-            table.insert(ref_from.next_layers, ref_to) -- add edge
-            ref_to.in_deg = ref_to.in_deg + 1          -- increase the in-degree of the target layer
-        end
-    end
-
-    -- topology sort
-    local queue = {}
-    local l = 1
-    local r = 1
-    for id, ref in pairs(layers) do
-        if ref.in_deg == 0 then
-            table.insert(queue, ref)
-            nerv.info("adding source layer: %s", id)
-            r = r + 1
-        end
-    end
-    if l == r then
-        nerv.error("loop detected")
-    end
-    while l < r do
-        local cur = queue[l]
-        cur.visited = true
-        l = l + 1
-        for _, nl in pairs(cur.next_layers) do
-            nl.in_deg = nl.in_deg - 1 
-            if nl.in_deg == 0 then
-                table.insert(queue, nl)
-                r = r + 1
-            end
-        end
-    end
-    for i = 1, #queue do
-        nerv.info("enqueued layer: %s %s", queue[i].layer, queue[i].layer.id)
-    end
-
-    for id, ref in pairs(layers) do
-        -- check wether the graph is connected
-        if ref.visited == false then
-            nerv.warning("layer %s is ignored", id)
-        end
-    end
-
-    self.layers = layers
-    self.inputs = inputs
-    self.outputs = outputs
-    self.id = id
-    self.dim_in = dim_in
-    self.dim_out = dim_out
-    self.parsed_conn = parsed_conn
-    self.queue = queue
-    self.gconf = global_conf
-end
-
-function DAGLayerT:init(batch_size, chunk_size)
-    nerv.info("initing DAGLayerT %s...", self.id)
-    if chunk_size == nil then
-        chunk_size = 1
-        nerv.info("(Initing DAGLayerT) chunk_size is nil, setting it to default 1\n")
-    end
-
-    self.chunk_size = chunk_size
-
-    for i, conn in ipairs(self.parsed_conn) do
-        local _, output_dim
-        local ref_from, port_from, ref_to, port_to
-        ref_from, port_from = unpack(conn[1])
-        ref_to, port_to = unpack(conn[2])
-        _, output_dim = ref_from.layer:get_dim()
-        local dim = 1
-        if output_dim[port_from] > 0 then
-            dim = output_dim[port_from]
-        end
-
-        for t = 1, chunk_size do
-            local mid = self.gconf.cumat_type(batch_size, dim)
-            local err_mid = mid:create()
-            
-            if ref_from.outputs[t] == nil then
-                ref_from.outputs[t] = {}
-            end
-            if ref_to.inputs[t] == nil then
-                ref_to.inputs[t] = {}
-            end
-            if ref_to.err_outputs[t] == nil then
-                ref_to.err_outputs[t] = {}
-            end
-            if ref_from.err_inputs[t] == nil then
-                ref_from.err_inputs[t] = {}
-            end
-            
-            ref_from.outputs[t][port_from] = mid
-            ref_to.inputs[t][port_to] = mid
-
-            ref_from.err_inputs[t][port_from] = err_mid
-            ref_to.err_outputs[t][port_to] = err_mid
-        end
-    end
-    for id, ref in pairs(self.layers) do
-        for i = 1, ref.input_len do
-            if ref.inputs[1][i] == nil then --peek at time 1
-                nerv.error("dangling input port %d of layer %s", i, id)
-            end
-        end
-        for i = 1, ref.output_len do
-            if ref.outputs[1][i] == nil then --peek at time 1
-                nerv.error("dangling output port %d of layer %s", i, id)
-            end
-        end
-        -- initialize sub layers
-        ref.layer:init(batch_size, chunk_size)
-    end
-    for i = 1, #self.dim_in do
-        if self.inputs[i] == nil then
-            nerv.error("dangling port %d of layer <input>", i)
-        end
-    end
-    for i = 1, #self.dim_out do
-        if self.outputs[i] == nil then
-            nerv.error("dangling port %d of layer <output>", i)
-        end
-    end
-end
-
-function DAGLayerT:batch_resize(batch_size, chunk_size)
-    if chunk_size == nil then
-        chunk_size = 1
-    end
-    if batch_size ~= self.gconf.batch_size 
-        or chunk_size ~= self.gconf.chunk_size then
-        nerv.printf("warn: in DAGLayerT:batch_resize, the batch_size ~= gconf.batch_size, or chunk_size ~= gconf.chunk_size")
-    end
-    self.gconf.batch_size = batch_size
-    self.gconf.chunk_size = chunk_size
-
-    for i, conn in ipairs(self.parsed_conn) do
-        local _, output_dim
-        local ref_from, port_from, ref_to, port_to
-        ref_from, port_from = unpack(conn[1])
-        ref_to, port_to = unpack(conn[2])
-        _, output_dim = ref_from.layer:get_dim()
-
-        for t = 1, chunk_size do
-            if ref_from.outputs[t] == nil then
-                ref_from.outputs[t] = {}
-            end
-            if ref_to.inputs[t] == nil then
-                ref_to.inputs[t] = {}
-            end
-            if ref_from.err_outputs[t] == nil then
-                ref_from.err_outputs[t] = {}
-            end
-            if ref_from.err_inputs[t] == nil then
-                ref_from.err_inputs[t] = {}
-            end
-            
-            local mid = self.gconf.cumat_type(batch_size, dim)
-            local err_mid = mid:create()
-            
-            ref_from.outputs[t][port_from] = mid
-            ref_to.inputs[t][port_to] = mid
-
-            ref_from.err_inputs[t][port_from] = err_mid
-            ref_to.err_outputs[t][port_to] = err_mid
-        end
-    end
-    for id, ref in pairs(self.layers) do
-        ref.layer:batch_resize(batch_size, chunk_size)
-    end
-    collectgarbage("collect")
-end
-
-function DAGLayerT:set_inputs(input, t)
-    for i = 1, #self.dim_in do
-        if input[i] == nil then
-            nerv.error("some input is not provided");
-        end
-        local layer = self.inputs[i][1]
-        local port = self.inputs[i][2]
-        if layer.inputs[t] == nil then
-            layer.inputs[t] = {}
-        end
-        layer.inputs[t][port] = input[i]
-    end
-end
-
-function DAGLayerT:set_outputs(output, t)
-    for i = 1, #self.dim_out do
-        if output[i] == nil then
-            nerv.error("some output is not provided");
-        end
-        local layer = self.outputs[i][1]
-        local port = self.outputs[i][2]
-        if layer.outputs[t] == nil then
-            layer.outputs[t] = {}
-        end
-        layer.outputs[t][port] = output[i]
-    end
-end
-
-function DAGLayerT:set_err_inputs(bp_err, t)
-    for i = 1, #self.dim_out do
-        local layer = self.outputs[i][1]
-        local port = self.outputs[i][2]
-        if layer.err_inputs[t] == nil then
-            layer.err_inputs[t] = {}
-        end
-        layer.err_inputs[t][port] = bp_err[i]
-    end
-end
-
-function DAGLayerT:set_err_outputs(next_bp_err, t)
-    for i = 1, #self.dim_in do
-        local layer = self.inputs[i][1]
-        local port = self.inputs[i][2]
-        if layer.err_outputs[t] == nil then
-            layer.err_outputs[t] = {}
-        end 
-        layer.err_outputs[t][port] = next_bp_err[i]
-    end
-end
-
-function DAGLayerT:update(bp_err, input, output, t)
-    if t == nil then
-        t = 1
-    end
-    self:set_err_inputs(bp_err, t)
-    self:set_inputs(input, t)
-    self:set_outputs(output, t)
-    for id, ref in pairs(self.queue) do
-        ref.layer:update(ref.err_inputs[t], ref.inputs[t], ref.outputs[t], t)
-    end
-end
-
-function DAGLayerT:propagate(input, output, t)
-    if t == nil then
-        t = 1
-    end
-    self:set_inputs(input, t)
-    self:set_outputs(output, t)
-    local ret = false
-    for i = 1, #self.queue do
-        local ref = self.queue[i]
-        --print("debug DAGLAyerT:propagate", ref.id, t)
-        ret = ref.layer:propagate(ref.inputs[t], ref.outputs[t], t)
-    end
-    return ret
-end
-
-function DAGLayerT:back_propagate(bp_err, next_bp_err, input, output, t)
-    if t == nil then
-        t = 1
-    end
-    self:set_err_outputs(next_bp_err, t)
-    self:set_err_inputs(bp_err, t)
-    self:set_inputs(input, t)
-    self:set_outputs(output, t)
-    for i = #self.queue, 1, -1 do
-        local ref = self.queue[i]
-        ref.layer:back_propagate(ref.err_inputs[t], ref.err_outputs[t], ref.inputs[t], ref.outputs[t], t)
-    end
-end
-
-function DAGLayerT:get_params()
-    local param_repos = {}
-    for id, ref in pairs(self.queue) do
-        table.insert(param_repos, ref.layer:get_params())
-    end
-    return nerv.ParamRepo.merge(param_repos)
-end
-
-DAGLayerT.PORT_TYPES = {
-    INPUT = {},
-    OUTPUT = {},
-    ERR_INPUT = {},
-    ERR_OUTPUT = {}
-}
-
-function DAGLayerT:get_intermediate(id, port_type)
-    if id == "<input>" or id == "<output>" then
-        nerv.error("an actual real layer id is expected")
-    end
-    local layer = self.layers[id]
-    if layer == nil then
-        nerv.error("layer id %s not found", id)
-    end
-    if port_type == DAGLayerT.PORT_TYPES.INPUT then
-        return layer.inputs
-    elseif port_type == DAGLayerT.PORT_TYPES.OUTPUT then
-        return layer.outputs
-    elseif port_type == DAGLayerT.PORT_TYPES.ERR_INPUT then
-        return layer.err_inputs
-    elseif port_type == DAGLayerT.PORT_TYPES.ERR_OUTPUT then
-        return layer.err_outputs
-    end
-    nerv.error("unrecognized port type")
-end
diff --git a/nerv/tnn/layersT/dropout_t.lua b/nerv/tnn/layersT/dropout_t.lua
deleted file mode 100644
index 4351285..0000000
--- a/nerv/tnn/layersT/dropout_t.lua
+++ /dev/null
@@ -1,71 +0,0 @@
-local Dropout = nerv.class("nerv.DropoutLayerT", "nerv.LayerT")
-
-function Dropout:__init(id, global_conf, layer_conf)
-    self.id = id
-    self.gconf = global_conf
-    self.dim_in = layer_conf.dim_in
-    self.dim_out = layer_conf.dim_out
-    self:check_dim_len(1, 1) -- two inputs: nn output and label
-end
-
-function Dropout:init(batch_size, chunk_size)
-    if self.dim_in[1] ~= self.dim_out[1] then
-        nerv.error("mismatching dimensions of input and output")
-    end
-    if chunk_size == nil then
-        chunk_size = 1
-    end
-    self.mask_t = {}
-    for t = 1, chunk_size do
-        self.mask_t[t] = self.gconf.cumat_type(batch_size, self.dim_in[1])
-    end
-end
-
-function Dropout:batch_resize(batch_size, chunk_size)
-    if chunk_size == nil then
-        chunk_size = 1
-    end
-    for t = 1, chunk_size do
-        if self.mask_t[t] == nil or self.mask_t[t]:nrow() ~= batch_size then
-            self.mask_t[t] = self.gconf.cumat_type(batch_size, self.dim_in[1])
-        end
-    end
-end
-
-function Dropout:propagate(input, output, t)
-    if t == nil then
-        t = 1
-    end
-    if self.gconf.dropout_rate == nil then
-        nerv.info("DropoutLayerT:propagate warning, global_conf.dropout_rate is nil, setting it zero")
-        self.gconf.dropout_rate = 0
-    end
-    
-    if self.gconf.dropout_rate == 0 then
-        output[1]:copy_fromd(input[1])
-    else
-        self.mask_t[t]:rand_uniform()
-        --since we will lose a portion of the actvations, we multiply the activations by 1/(1-dr) to compensate
-        self.mask_t[t]:thres_mask(self.mask_t[t], self.gconf.dropout_rate, 0, 1 / (1.0 - self.gconf.dropout_rate))
-        output[1]:mul_elem(input[1], self.mask_t[t])
-    end
-end
-
-function Dropout:update(bp_err, input, output, t)
-    -- no params, therefore do nothing
-end
-
-function Dropout:back_propagate(bp_err, next_bp_err, input, output, t)
-    if t == nil then
-        t = 1
-    end
-    if self.gconf.dropout_rate == 0 then
-        next_bp_err[1]:copy_fromd(bp_err[1])
-    else
-        next_bp_err[1]:mul_elem(bp_err[1], self.mask_t[t])
-    end
-end
-
-function Dropout:get_params()
-    return nerv.ParamRepo({})
-end
diff --git a/nerv/tnn/layersT/gru_t.lua b/nerv/tnn/layersT/gru_t.lua
deleted file mode 100644
index 8f15cc8..0000000
--- a/nerv/tnn/layersT/gru_t.lua
+++ /dev/null
@@ -1,114 +0,0 @@
-local GRULayerT = nerv.class('nerv.GRULayerT', 'nerv.LayerT')
-
-function GRULayerT:__init(id, global_conf, layer_conf)
-    --input1:x input2:h input3:c(h^~)
-    self.id = id
-    self.dim_in = layer_conf.dim_in
-    self.dim_out = layer_conf.dim_out
-    self.gconf = global_conf
-
-    if self.dim_in[2] ~= self.dim_out[1] then
-        nerv.error("dim_in[2](%d) mismatch with dim_out[1](%d)", self.dim_in[2], self.dim_out[1])
-    end
-
-    --prepare a DAGLayerT to hold the lstm structure
-    local pr = layer_conf.pr
-    if pr == nil then
-        pr = nerv.ParamRepo()
-    end
-    
-    local function ap(str)
-        return self.id .. '.' .. str
-    end
-
-    local layers = {
-        ["nerv.CombinerLayer"] = {
-            [ap("inputXDup")] = {{}, {["dim_in"] = {self.dim_in[1]}, 
-                ["dim_out"] = {self.dim_in[1], self.dim_in[1], self.dim_in[1]}, ["lambda"] = {1}}},
-            [ap("inputHDup")] = {{}, {["dim_in"] = {self.dim_in[2]}, 
-                ["dim_out"] = {self.dim_in[2], self.dim_in[2], self.dim_in[2], self.dim_in[2], self.dim_in[2]}, ["lambda"] = {1}}},
-            [ap("updateGDup")] = {{}, {["dim_in"] = {self.dim_in[2]},
-                ["dim_out"] = {self.dim_in[2], self.dim_in[2]}, ["lambda"] = {1}}},
-            [ap("updateMergeL")] = {{}, {["dim_in"] = {self.dim_in[2], self.dim_in[2], self.dim_in[2]}, ["dim_out"] = {self.dim_out[1]},
-                ["lambda"] = {1, -1, 1}}},
-        },
-        ["nerv.AffineLayer"] = {
-            [ap("mainAffineL")] = {{}, {["dim_in"] = {self.dim_in[1], self.dim_in[2]}, ["dim_out"] = {self.dim_out[1]}, ["pr"] = pr}},
-        },
-        ["nerv.TanhLayer"] = {
-            [ap("mainTanhL")] = {{}, {["dim_in"] = {self.dim_out[1]}, ["dim_out"] = {self.dim_out[1]}}},
-        },
-        ["nerv.GateFLayer"] = {
-            [ap("resetGateL")] = {{}, {["dim_in"] = {self.dim_in[1], self.dim_in[2]}, 
-                ["dim_out"] = {self.dim_in[2]}, ["pr"] = pr}},
-            [ap("updateGateL")] = {{}, {["dim_in"] = {self.dim_in[1], self.dim_in[2]}, 
-                ["dim_out"] = {self.dim_in[2]}, ["pr"] = pr}},
-        },
-        ["nerv.ElemMulLayer"] = {
-            [ap("resetGMulL")] = {{}, {["dim_in"] = {self.dim_in[2], self.dim_in[2]}, ["dim_out"] = {self.dim_in[2]}}},
-            [ap("updateGMulCL")] = {{}, {["dim_in"] = {self.dim_in[2], self.dim_in[2]}, ["dim_out"] = {self.dim_in[2]}}},
-            [ap("updateGMulHL")] = {{}, {["dim_in"] = {self.dim_in[2], self.dim_in[2]}, ["dim_out"] = {self.dim_in[2]}}},
-        },
-    }
-    
-    local layerRepo = nerv.LayerRepo(layers, pr, global_conf)
-
-    local connections_t = {
-        ["<input>[1]"] = ap("inputXDup[1]"), 
-        ["<input>[2]"] = ap("inputHDup[1]"),
-
-        [ap("inputXDup[1]")] = ap("resetGateL[1]"),
-        [ap("inputHDup[1]")] = ap("resetGateL[2]"),
-        [ap("inputXDup[2]")] = ap("updateGateL[1]"),
-        [ap("inputHDup[2]")] = ap("updateGateL[2]"),
-        [ap("updateGateL[1]")] = ap("updateGDup[1]"),
-
-        [ap("resetGateL[1]")] = ap("resetGMulL[1]"),
-        [ap("inputHDup[3]")] = ap("resetGMulL[2]"),
-
-        [ap("inputXDup[3]")] = ap("mainAffineL[1]"),
-        [ap("resetGMulL[1]")] = ap("mainAffineL[2]"),
-        [ap("mainAffineL[1]")] = ap("mainTanhL[1]"),
-
-        [ap("updateGDup[1]")] = ap("updateGMulHL[1]"),
-        [ap("inputHDup[4]")] = ap("updateGMulHL[2]"),
-        [ap("updateGDup[2]")] = ap("updateGMulCL[1]"),
-        [ap("mainTanhL[1]")] = ap("updateGMulCL[2]"),
- 
-        [ap("inputHDup[5]")] = ap("updateMergeL[1]"),
-        [ap("updateGMulHL[1]")] = ap("updateMergeL[2]"),
-        [ap("updateGMulCL[1]")] = ap("updateMergeL[3]"),
-
-        [ap("updateMergeL[1]")] = "<output>[1]",
-    }
-
-    self.dagL = nerv.DAGLayerT(self.id, global_conf, 
-            {["dim_in"] = self.dim_in, ["dim_out"] = self.dim_out, ["sub_layers"] = layerRepo, 
-            ["connections"] = connections_t})
-    
-    self:check_dim_len(2, 1) -- x, h and h
-end
-
-function GRULayerT:init(batch_size, chunk_size)
-    self.dagL:init(batch_size, chunk_size)
-end
-
-function GRULayerT:batch_resize(batch_size, chunk_size)
-    self.dagL:batch_resize(batch_size, chunk_size)
-end
-
-function GRULayerT:update(bp_err, input, output, t)
-    self.dagL:update(bp_err, input, output, t)
-end
-
-function GRULayerT:propagate(input, output, t)
-    self.dagL:propagate(input, output, t)
-end
-
-function GRULayerT:back_propagate(bp_err, next_bp_err, input, output, t)
-    self.dagL:back_propagate(bp_err, next_bp_err, input, output, t)
-end
-
-function GRULayerT:get_params()
-    return self.dagL:get_params()
-end
diff --git a/nerv/tnn/layersT/lstm_t.lua b/nerv/tnn/layersT/lstm_t.lua
deleted file mode 100644
index 04d0600..0000000
--- a/nerv/tnn/layersT/lstm_t.lua
+++ /dev/null
@@ -1,124 +0,0 @@
-local LSTMLayerT = nerv.class('nerv.LSTMLayerT', 'nerv.LayerT')
-
-function LSTMLayerT:__init(id, global_conf, layer_conf)
-    --input1:x input2:h input3:c
-    self.id = id
-    self.dim_in = layer_conf.dim_in
-    self.dim_out = layer_conf.dim_out
-    self.gconf = global_conf
-
-    --prepare a DAGLayerT to hold the lstm structure
-    local pr = layer_conf.pr
-    if pr == nil then
-        pr = nerv.ParamRepo()
-    end
-    
-    local function ap(str)
-        return self.id .. '.' .. str
-    end
-
-    local layers = {
-        ["nerv.CombinerLayer"] = {
-            [ap("inputXDup")] = {{}, {["dim_in"] = {self.dim_in[1]}, 
-                ["dim_out"] = {self.dim_in[1], self.dim_in[1], self.dim_in[1], self.dim_in[1]}, ["lambda"] = {1}}},
-            [ap("inputHDup")] = {{}, {["dim_in"] = {self.dim_in[2]}, 
-                ["dim_out"] = {self.dim_in[2], self.dim_in[2], self.dim_in[2], self.dim_in[2]}, ["lambda"] = {1}}},
-            [ap("inputCDup")] = {{}, {["dim_in"] = {self.dim_in[3]}, 
-                ["dim_out"] = {self.dim_in[3], self.dim_in[3], self.dim_in[3]}, ["lambda"] = {1}}},
-            [ap("mainCDup")] = {{}, {["dim_in"] = {self.dim_in[3], self.dim_in[3]}, ["dim_out"] = {self.dim_in[3], self.dim_in[3], self.dim_in[3]},
-                ["lambda"] = {1, 1}}},
-        },
-        ["nerv.AffineLayer"] = {
-            [ap("mainAffineL")] = {{}, {["dim_in"] = {self.dim_in[1], self.dim_in[2]}, 
-                ["dim_out"] = {self.dim_out[1]}, ["pr"] = pr}},
-        },
-        ["nerv.TanhLayer"] = {
-            [ap("mainTanhL")] = {{}, {["dim_in"] = {self.dim_out[1]}, ["dim_out"] = {self.dim_out[1]}}},
-            [ap("outputTanhL")] = {{}, {["dim_in"] = {self.dim_out[1]}, ["dim_out"] = {self.dim_out[1]}}},
-        },
-        ["nerv.GateFLayer"] = {
-            [ap("forgetGateL")] = {{}, {["dim_in"] = {self.dim_in[1], self.dim_in[2], self.dim_in[3]}, 
-                ["dim_out"] = {self.dim_in[3]}, ["pr"] = pr}},
-            [ap("inputGateL")] = {{}, {["dim_in"] = {self.dim_in[1], self.dim_in[2], self.dim_in[3]}, 
-                ["dim_out"] = {self.dim_in[3]}, ["pr"] = pr}},
-            [ap("outputGateL")] = {{}, {["dim_in"] = {self.dim_in[1], self.dim_in[2], self.dim_in[3]}, 
-                ["dim_out"] = {self.dim_in[3]}, ["pr"] = pr}},
-
-        },
-        ["nerv.ElemMulLayer"] = {
-            [ap("inputGMulL")] = {{}, {["dim_in"] = {self.dim_in[3], self.dim_in[3]}, ["dim_out"] = {self.dim_in[3]}}},
-            [ap("forgetGMulL")] = {{}, {["dim_in"] = {self.dim_in[3], self.dim_in[3]}, ["dim_out"] = {self.dim_in[3]}}},
-            [ap("outputGMulL")] = {{}, {["dim_in"] = {self.dim_in[3], self.dim_in[3]}, ["dim_out"] = {self.dim_in[3]}}},
-        },
-    }
-    
-    local layerRepo = nerv.LayerRepo(layers, pr, global_conf)
-
-    local connections_t = {
-        ["<input>[1]"] = ap("inputXDup[1]"), 
-        ["<input>[2]"] = ap("inputHDup[1]"),
-        ["<input>[3]"] = ap("inputCDup[1]"),
-
-        [ap("inputXDup[1]")] = ap("mainAffineL[1]"),
-        [ap("inputHDup[1]")] = ap("mainAffineL[2]"),
-        [ap("mainAffineL[1]")] = ap("mainTanhL[1]"),
-
-        [ap("inputXDup[2]")] = ap("inputGateL[1]"),
-        [ap("inputHDup[2]")] = ap("inputGateL[2]"),
-        [ap("inputCDup[1]")] = ap("inputGateL[3]"),
-        
-        [ap("inputXDup[3]")] = ap("forgetGateL[1]"),
-        [ap("inputHDup[3]")] = ap("forgetGateL[2]"),
-        [ap("inputCDup[2]")] = ap("forgetGateL[3]"),
-
-        [ap("mainTanhL[1]")] = ap("inputGMulL[1]"),
-        [ap("inputGateL[1]")] = ap("inputGMulL[2]"),
-        
-        [ap("inputCDup[3]")] = ap("forgetGMulL[1]"),
-        [ap("forgetGateL[1]")] = ap("forgetGMulL[2]"),
-
-        [ap("inputGMulL[1]")] = ap("mainCDup[1]"),
-        [ap("forgetGMulL[1]")] = ap("mainCDup[2]"),
-
-        [ap("inputXDup[4]")] = ap("outputGat