IVGCVSW-3236 Extend Ref LSTM with layer normalization support

* Add descriptor values
* Update lstm queue descriptor validate function
* Update lstm workload
* Update isLstmSupported (Cl and Ref), LayerSupportBase, ILayerSupport
* Update lstm layer
* Add unit tests

Signed-off-by: Jan Eilers <jan.eilers@arm.com>
Change-Id: I932175d550facfb342325051eaa7bd2084ebdc18
Signed-off-by: Jan Eilers <jan.eilers@arm.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/backends/reference/workloads/RefLstmWorkload.hpp b/src/backends/reference/workloads/RefLstmWorkload.hpp
index 38e3fb956c..ce5a775269 100644
--- a/src/backends/reference/workloads/RefLstmWorkload.hpp
+++ b/src/backends/reference/workloads/RefLstmWorkload.hpp
@@ -38,6 +38,12 @@ private:
     std::unique_ptr<ScopedCpuTensorHandle> m_OutputGateBiasTensor;
     std::unique_ptr<ScopedCpuTensorHandle> m_ProjectionWeightsTensor;
     std::unique_ptr<ScopedCpuTensorHandle> m_ProjectionBiasTensor;
+    std::unique_ptr<ScopedCpuTensorHandle> m_InputLayerNormWeights;
+    std::unique_ptr<ScopedCpuTensorHandle> m_ForgetLayerNormWeights;
+    std::unique_ptr<ScopedCpuTensorHandle> m_CellLayerNormWeights;
+    std::unique_ptr<ScopedCpuTensorHandle> m_OutputLayerNormWeights;
+
+    float m_LayerNormEpsilon = static_cast<float>(1e-8);
 };
 
 } //namespace armnn