IVGCVSW-3694 Add ArgMinMax implementation for Ref

 * Add ArgMinMax implementation
 * Add utility function to get number of elements between axis
 * Add utility function to get unsigned axis
 * Unit tests for ArgMinMax function

Signed-off-by: Narumol Prangnawarat <narumol.prangnawarat@arm.com>
Change-Id: I7bc3d610dda9526190187eb87394a8ed7a4b5cdd

1 files changed, 58 insertions, 0 deletions

diff --git a/src/backends/reference/test/ArgMinMaxTests.cpp b/src/backends/reference/test/ArgMinMaxTests.cpp
new file mode 100644
index 0000000000..201a2c0c2e
--- /dev/null
+++ b/src/backends/reference/test/ArgMinMaxTests.cpp
@@ -0,0 +1,58 @@
+//
+// Copyright © 2019 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include <reference/workloads/ArgMinMax.hpp>
+
+#include <boost/test/unit_test.hpp>
+
+BOOST_AUTO_TEST_SUITE(RefArgMinMax)
+
+BOOST_AUTO_TEST_CASE(ArgMinTest)
+{
+    const armnn::TensorInfo inputInfo({ 1, 2, 3 } , armnn::DataType::Float32);
+    const armnn::TensorInfo outputInfo({ 1, 3 }, armnn::DataType::Float32);
+
+    std::vector<float> inputValues({ 1.0f, 5.0f, 3.0f, 4.0f, 2.0f, 6.0f});
+    std::vector<int32_t> outputValues(outputInfo.GetNumElements());
+    std::vector<int32_t> expectedValues({ 0, 1, 0 });
+
+    ArgMinMax(*armnn::MakeDecoder<float>(inputInfo, inputValues.data()),
+               outputValues.data(),
+               inputInfo,
+               outputInfo,
+               armnn::ArgMinMaxFunction::Min,
+               -2);
+
+    BOOST_CHECK_EQUAL_COLLECTIONS(outputValues.begin(),
+                                  outputValues.end(),
+                                  expectedValues.begin(),
+                                  expectedValues.end());
+
+}
+
+BOOST_AUTO_TEST_CASE(ArgMaxTest)
+{
+    const armnn::TensorInfo inputInfo({ 1, 2, 3 } , armnn::DataType::Float32);
+    const armnn::TensorInfo outputInfo({ 1, 3 }, armnn::DataType::Float32);
+
+    std::vector<float> inputValues({ 1.0f, 5.0f, 3.0f, 4.0f, 2.0f, 6.0f });
+    std::vector<int32_t> outputValues(outputInfo.GetNumElements());
+    std::vector<int32_t> expectedValues({ 1, 0, 1 });
+
+    ArgMinMax(*armnn::MakeDecoder<float>(inputInfo, inputValues.data()),
+               outputValues.data(),
+               inputInfo,
+               outputInfo,
+               armnn::ArgMinMaxFunction::Max,
+               -2);
+
+    BOOST_CHECK_EQUAL_COLLECTIONS(outputValues.begin(),
+                                  outputValues.end(),
+                                  expectedValues.begin(),
+                                  expectedValues.end());
+
+}
+
+BOOST_AUTO_TEST_SUITE_END()
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