1 files changed, 26 insertions, 0 deletions
diff --git a/CMulTable.lua b/CMulTable.lua
new file mode 100644
index 0000000..4c058b6
--- /dev/null
+++ b/CMulTable.lua
@@ -0,0 +1,26 @@
+
+local CMulTable, parent = torch.class('nn.CMulTable', 'nn.Module')
+
+function CMulTable:__init()
+   parent.__init(self)
+   self.gradInput = {}
+end
+
+function CMulTable:updateOutput(input)
+   self.output:resizeAs(input[1]):copy(input[1])
+   for i=2,#input do
+      self.output:cmul(input[i])
+   end
+   return self.output
+end
+
+function CMulTable:updateGradInput(input, gradOutput)
+   local tout = torch.Tensor():resizeAs(self.output)
+   for i=1,#input do
+      self.gradInput[i] = self.gradInput[i] or torch.Tensor()
+      self.gradInput[i]:resizeAs(input[i]):copy(gradOutput)
+      tout:copy(self.output):cdiv(input[i])
+      self.gradInput[i]:cmul(tout)
+   end
+   return self.gradInput
+end