IVGCVSW-3723 Adding reference workload support for ArgMinMax

Change-Id: I65209ecec4e3abf808163239748d6e830568c2e3
Signed-off-by: Nikhil Raj <nikhil.raj@arm.com>
diff --git a/src/backends/backendsCommon/WorkloadData.cpp b/src/backends/backendsCommon/WorkloadData.cpp
index 136c196..c8c4f9a 100644
--- a/src/backends/backendsCommon/WorkloadData.cpp
+++ b/src/backends/backendsCommon/WorkloadData.cpp
@@ -471,6 +471,11 @@
     const TensorInfo& inputTensorInfo  = workloadInfo.m_InputTensorInfos[0];
     const TensorInfo& outputTensorInfo = workloadInfo.m_OutputTensorInfos[0];
 
+    if (outputTensorInfo.GetDataType() != DataType::Signed32)
+    {
+        throw InvalidArgumentException(descriptorName + ": Output of ArgMinMax layer must be Int32.");
+    }
+
     std::vector<DataType> supportedTypes =
             {
                     DataType::Float16,
@@ -480,8 +485,6 @@
             };
 
     ValidateDataTypes(inputTensorInfo, supportedTypes, descriptorName);
-    ValidateTensorDataTypesMatch(inputTensorInfo, outputTensorInfo, descriptorName, "input", "output");
-    ValidateTensorShapesMatch(inputTensorInfo, outputTensorInfo, descriptorName, "input", "output");
 }
 
 void SoftmaxQueueDescriptor::Validate(const WorkloadInfo& workloadInfo) const