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1 files changed, 31 insertions, 0 deletions

diff --git a/nerv/layer/softmax.lua b/nerv/layer/softmax.lua
new file mode 100644
index 0000000..e979ebf
--- /dev/null
+++ b/nerv/layer/softmax.lua
@@ -0,0 +1,31 @@
+local SoftmaxLayer = nerv.class("nerv.SoftmaxLayer", "nerv.Layer")
+
+function SoftmaxLayer:__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 SoftmaxLayer:init(batch_size)
+    if self.dim_in[1] ~= self.dim_out[1] then
+        nerv.error("mismatching dimensions of input and output")
+    end
+end
+
+function SoftmaxLayer:update(bp_err, input, output)
+    -- no params, therefore do nothing
+end
+
+function SoftmaxLayer:propagate(input, output)
+    output[1]:softmax(input[1])
+end
+
+function SoftmaxLayer:back_propagate(bp_err, next_bp_err, input, output)
+    nerv.error_method_not_implemented()
+end
+
+function SoftmaxLayer:get_params()
+    return nerv.ParamRepo({})
+end