IVGCVSW-3469 Add front end for Quantized LSTM layer

 * Added new layer QuantizedLstm (Android Q)
 * Made necessary changes to APIs
 * Added unit tests

Change-Id: I3b9f16b0e7e49f51932cf204c87cb7118798123a
Signed-off-by: James Conroy <james.conroy@arm.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/src/armnn/Network.cpp b/src/armnn/Network.cpp
index a43800827f..2195c71735 100644
--- a/src/armnn/Network.cpp
+++ b/src/armnn/Network.cpp
@@ -1458,6 +1458,44 @@ IConnectableLayer* Network::AddStackLayer(const StackDescriptor& stackDescriptor
     return m_Graph->AddLayer<StackLayer>(stackDescriptor, name);
 }
 
+IConnectableLayer* Network::AddQuantizedLstmLayer(const QuantizedLstmInputParams& params,
+                                                  const char* name)
+{
+    const auto layer = m_Graph->AddLayer<QuantizedLstmLayer>(name);
+
+    // InputToX weights
+    layer->m_QuantizedLstmParameters.m_InputToInputWeights =
+            std::make_unique<ScopedCpuTensorHandle>(params.get_InputToInputWeights());
+    layer->m_QuantizedLstmParameters.m_InputToForgetWeights =
+            std::make_unique<ScopedCpuTensorHandle>(params.get_InputToForgetWeights());
+    layer->m_QuantizedLstmParameters.m_InputToCellWeights =
+            std::make_unique<ScopedCpuTensorHandle>(params.get_InputToCellWeights());
+    layer->m_QuantizedLstmParameters.m_InputToOutputWeights =
+            std::make_unique<ScopedCpuTensorHandle>(params.get_InputToOutputWeights());
+
+    // RecurrentToX weights
+    layer->m_QuantizedLstmParameters.m_RecurrentToInputWeights =
+            std::make_unique<ScopedCpuTensorHandle>(params.get_RecurrentToInputWeights());
+    layer->m_QuantizedLstmParameters.m_RecurrentToForgetWeights =
+            std::make_unique<ScopedCpuTensorHandle>(params.get_RecurrentToForgetWeights());
+    layer->m_QuantizedLstmParameters.m_RecurrentToCellWeights =
+            std::make_unique<ScopedCpuTensorHandle>(params.get_RecurrentToCellWeights());
+    layer->m_QuantizedLstmParameters.m_RecurrentToOutputWeights =
+            std::make_unique<ScopedCpuTensorHandle>(params.get_RecurrentToOutputWeights());
+
+    // Bias
+    layer->m_QuantizedLstmParameters.m_InputGateBias =
+            std::make_unique<ScopedCpuTensorHandle>(params.get_InputGateBias());
+    layer->m_QuantizedLstmParameters.m_ForgetGateBias =
+            std::make_unique<ScopedCpuTensorHandle>(params.get_ForgetGateBias());
+    layer->m_QuantizedLstmParameters.m_CellBias =
+            std::make_unique<ScopedCpuTensorHandle>(params.get_CellBias());
+    layer->m_QuantizedLstmParameters.m_OutputGateBias =
+            std::make_unique<ScopedCpuTensorHandle>(params.get_OutputGateBias());
+
+    return layer;
+}
+
 void Network::Accept(ILayerVisitor& visitor) const
 {
     for (auto layer : GetGraph())