IVGCVSW-3696 Add NEON ArgMinMax workload and tests

 * Added layer tests and fixed WorkloadData validate.
 * Also enabled copy to/from NEON for Signed32.

Signed-off-by: James Conroy <james.conroy@arm.com>
Change-Id: I5e961f88434e18d5a8ebff956d20a1c2cf1b50bb
diff --git a/src/backends/neon/workloads/NeonArgMinMaxWorkload.hpp b/src/backends/neon/workloads/NeonArgMinMaxWorkload.hpp
new file mode 100644
index 0000000..6301b13
--- /dev/null
+++ b/src/backends/neon/workloads/NeonArgMinMaxWorkload.hpp
@@ -0,0 +1,29 @@
+//
+// Copyright © 2019 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include <backendsCommon/Workload.hpp>
+
+#include <arm_compute/core/Error.h>
+#include <arm_compute/runtime/NEON/functions/NEArgMinMaxLayer.h>
+namespace armnn
+{
+
+arm_compute::Status NeonArgMinMaxWorkloadValidate(const TensorInfo& input,
+                                                  const TensorInfo& output,
+                                                  const ArgMinMaxDescriptor& descriptor);
+
+class NeonArgMinMaxWorkload : public BaseWorkload<ArgMinMaxQueueDescriptor>
+{
+public:
+    NeonArgMinMaxWorkload(const ArgMinMaxQueueDescriptor& descriptor, const WorkloadInfo& info);
+    virtual void Execute() const override;
+
+private:
+    mutable arm_compute::NEArgMinMaxLayer m_ArgMinMaxLayer;
+};
+
+} //namespace armnn