Added very simple add and mul constant modules.

1 files changed, 21 insertions, 0 deletions

diff --git a/MulConstant.lua b/MulConstant.lua
new file mode 100644
index 0000000..982ab41
--- /dev/null
+++ b/MulConstant.lua
@@ -0,0 +1,21 @@
+local MulConstant, parent = torch.class('nn.MulConstant', 'nn.Module')
+
+function MulConstant:__init(constant_scalar)
+  parent.__init(self)
+  assert(type(constant_scalar) == 'number', 'input is not scalar!')
+  self.constant_scalar = constant_scalar
+end
+
+function MulConstant:updateOutput(input)
+  self.output:resizeAs(input)
+  self.output:copy(input)
+  self.output:mul(self.constant_scalar)
+  return self.output
+end 
+
+function MulConstant:updateGradInput(input, gradOutput)
+  self.gradInput:resizeAs(gradOutput)
+  self.gradInput:copy(gradOutput)
+  self.gradInput:mul(self.constant_scalar)
+  return self.gradInput
+end