From f195f03e095a5c4dc6880be11af64cab83b5c94b Mon Sep 17 00:00:00 2001
From: David Beck <david.beck@arm.com>
Date: Thu, 6 Sep 2018 16:46:34 +0100
Subject: IVGCVSW-1803 : add Ref Subtraction layer

Change-Id: I4c019d626f9369245eca6d549bbe7a28e141f198
---
 src/armnn/backends/RefWorkloads/Subtraction.cpp | 44 +++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 src/armnn/backends/RefWorkloads/Subtraction.cpp

(limited to 'src/armnn/backends/RefWorkloads/Subtraction.cpp')

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
-- 
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