1 files changed, 44 insertions, 0 deletions
diff --git a/src/armnn/backends/RefWorkloads/Subtraction.cpp b/src/armnn/backends/RefWorkloads/Subtraction.cpp
new file mode 100644
index 0000000000..f25c8adb1c
--- /dev/null
+++ b/src/armnn/backends/RefWorkloads/Subtraction.cpp
@@ -0,0 +1,44 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include "Subtraction.hpp"
+#include "Broadcast.hpp"
+
+#include <functional>
+
+namespace
+{
+
+void ElementwiseSubtraction(unsigned int numElements, const float* inData0, const float* inData1, float* outData)
+{
+    for (unsigned int i = 0; i < numElements; ++i)
+    {
+        outData[i] = inData0[i] - inData1[i];
+    }
+}
+
+} // namespace
+
+namespace armnn
+{
+
+void Subtraction(const TensorShape& inShape0,
+                 const TensorShape& inShape1,
+                 const TensorShape& outShape,
+                 const float* inData0,
+                 const float* inData1,
+                 float* outData)
+{
+    if (inShape0 == inShape1)
+    {
+        ElementwiseSubtraction(inShape0.GetNumElements(), inData0, inData1, outData);
+    }
+    else
+    {
+        BroadcastLoop(inShape0, inShape1, outShape).Unroll(std::minus<float>(), 0, inData0, inData1, outData);
+    }
+}
+
+} //namespace armnn