IVGCVSW-7342 Add Slice support to TOSA Reference Backend

Signed-off-by: Cathal Corbett <cathal.corbett@arm.com>
Change-Id: I8be286b69bebd4cd36033e3145632bb043938d16

2 files changed, 84 insertions, 0 deletions

diff --git a/src/backends/tosaCommon/test/OneToOneMappingTests.cpp b/src/backends/tosaCommon/test/OneToOneMappingTests.cpp
index b1fa6847bc..07ffae41d1 100644
--- a/src/backends/tosaCommon/test/OneToOneMappingTests.cpp
+++ b/src/backends/tosaCommon/test/OneToOneMappingTests.cpp
@@ -375,6 +375,69 @@ TEST_CASE("GetTosaMappingFromLayer_ReshapeLayer")
                                         LayerType::Reshape);
 }
 
+TEST_CASE("GetTosaMapping_SliceLayer")
+{
+    TensorInfo inputInfo = TensorInfo({ 3, 2, 3 }, DataType::Float32);
+    TensorInfo outputInfo = TensorInfo({ 2, 1, 3 }, DataType::Float32);
+
+    std::vector<std::vector<int32_t>> inputShape  = {{ 3, 2, 3 }};
+    std::vector<std::vector<int32_t>> outputShape = {{ 2, 1, 3 }};
+
+    SliceDescriptor descriptor;
+    descriptor.m_Begin = { 3 };
+    descriptor.m_Size  = { 3 };
+
+    TosaSerializationBasicBlock* basicBlock =
+        GetTosaMapping(nullptr, LayerType::Slice, {&inputInfo}, {&outputInfo}, descriptor);
+    AssertTosaOneToOneMappingBasicBlock(basicBlock,
+                                        inputShape,
+                                        outputShape,
+                                        Op_SLICE,
+                                        Attribute_SliceAttribute,
+                                        descriptor,
+                                        LayerType::Slice);
+}
+
+TEST_CASE("GetTosaMappingFromLayer_SliceLayer")
+{
+    IRuntime::CreationOptions options;
+    IRuntimePtr runtime(IRuntime::Create(options));
+
+    // Builds up the structure of the network.
+    INetworkPtr net(INetwork::Create());
+
+    TensorInfo inputInfo = TensorInfo({ 3, 2, 3 }, DataType::Float32);
+    TensorInfo outputInfo = TensorInfo({ 2, 1, 3 }, DataType::Float32);
+
+    std::vector<std::vector<int32_t>> inputShape  = {{ 3, 2, 3 }};
+    std::vector<std::vector<int32_t>> outputShape = {{ 2, 1, 3 }};
+
+    SliceDescriptor descriptor;
+    descriptor.m_Begin = { 1, 0, 0 };
+    descriptor.m_Size  = { 2, 1, 3 };
+
+    IConnectableLayer* input  = net->AddInputLayer(0, "input");
+    IConnectableLayer* slice  = net->AddSliceLayer(descriptor, "slice");
+    IConnectableLayer* output = net->AddOutputLayer(0, "output");
+
+    input->GetOutputSlot(0).Connect(slice->GetInputSlot(0));
+    slice->GetOutputSlot(0).Connect(output->GetInputSlot(0));
+
+    input->GetOutputSlot(0).SetTensorInfo(inputInfo);
+    slice->GetOutputSlot(0).SetTensorInfo(outputInfo);
+
+    TosaSerializationBasicBlock* basicBlock =
+        GetTosaMappingFromLayer(PolymorphicDowncast<Layer*>(slice));
+    AssertTosaOneToOneMappingBasicBlock(basicBlock,
+                                        inputShape,
+                                        outputShape,
+                                        Op_SLICE,
+                                        Attribute_SliceAttribute,
+                                        descriptor,
+                                        LayerType::Slice);
+}
+
+
 TEST_CASE("GetTosaMapping_Unimplemented")
 {
     TosaSerializationBasicBlock* basicBlock =
diff --git a/src/backends/tosaCommon/test/TosaTestUtils.hpp b/src/backends/tosaCommon/test/TosaTestUtils.hpp
index 5c10a6d638..93b9e7d36f 100644
--- a/src/backends/tosaCommon/test/TosaTestUtils.hpp
+++ b/src/backends/tosaCommon/test/TosaTestUtils.hpp
@@ -122,6 +122,27 @@ inline void VerifyTosaAttribute(const BaseDescriptor& descriptor,
                                                              1,
                                                              std::multiplies<int32_t>());
             CHECK(numInputElements == numAttributeShapeElements);
+
+            break;
+        }
+        case LayerType::Slice:
+        {
+            auto sliceDesc = PolymorphicDowncast<const SliceDescriptor*>(&descriptor);
+            TosaSliceAttribute reshapeAttribute(attribute);
+
+            std::vector<int32_t> begin(sliceDesc->m_Begin.begin(), sliceDesc->m_Begin.end());
+            std::vector<int32_t> size(sliceDesc->m_Size.begin(), sliceDesc->m_Size.end());
+
+            CHECK(begin == reshapeAttribute.start());
+            CHECK(size == reshapeAttribute.size());
+
+            CHECK(begin.size() == inputShape.size());
+            CHECK(size.size() == inputShape.size());
+
+            CHECK(begin.size() == outputShape.size());
+            CHECK(size.size() == outputShape.size());
+
+            break;
         }
         default:
             break;