From 4df3893abd1b9f840f1d9a8c1859799ccbf941de Mon Sep 17 00:00:00 2001
From: Ronan Collobert <ronan@collobert.com>
Date: Wed, 25 Jan 2012 14:55:20 +0100
Subject: initial revamp of torch7 tree

---
 CDivTable.lua | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 CDivTable.lua

(limited to 'CDivTable.lua')

diff --git a/CDivTable.lua b/CDivTable.lua
new file mode 100644
index 0000000..f91d024
--- /dev/null
+++ b/CDivTable.lua
@@ -0,0 +1,21 @@
+
+local CDivTable, parent = torch.class('nn.CDivTable', 'nn.Module')
+
+function CDivTable:__init()
+   parent.__init(self)
+   self.gradInput = {}
+end
+
+function CDivTable:updateOutput(input)
+   self.output:resizeAs(input[1]):copy(input[1])
+   self.output:cdiv(input[2])
+   return self.output
+end
+
+function CDivTable:updateGradInput(input, gradOutput)
+   self.gradInput[1] = self.gradInput[1] or torch.Tensor()
+   self.gradInput[2] = self.gradInput[2] or torch.Tensor()
+   self.gradInput[1]:resizeAs(input[1]):copy(gradOutput):cdiv(input[2])
+   self.gradInput[2]:resizeAs(input[2]):zero():addcdiv(-1,self.gradInput[1],input[2]):cmul(input[1])
+   return self.gradInput
+end
-- 
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