1 files changed, 25 insertions, 0 deletions
diff --git a/contrib/lua-torch/nn/HardShrink.lua b/contrib/lua-torch/nn/HardShrink.lua
new file mode 100644
index 000000000..85ff5909c
--- /dev/null
+++ b/contrib/lua-torch/nn/HardShrink.lua
@@ -0,0 +1,25 @@
+local HardShrink, parent = torch.class('nn.HardShrink', 'nn.Module')
+
+function HardShrink:__init(lam)
+   parent.__init(self)
+   self.lambda = lam or 0.5
+end
+
+function HardShrink:updateOutput(input)
+   input.THNN.HardShrink_updateOutput(
+      input:cdata(),
+      self.output:cdata(),
+      self.lambda
+   )
+   return self.output
+end
+
+function HardShrink:updateGradInput(input, gradOutput)
+   input.THNN.HardShrink_updateGradInput(
+      input:cdata(),
+      gradOutput:cdata(),
+      self.gradInput:cdata(),
+      self.lambda
+   )
+   return self.gradInput
+end