IVGCVSW-3609 Fix decoding and encoding of INT32 tensors

* Added Int32Decoder and Int32Encoder to decode INT32 tensors
* Changed MakeDecoder to return ScaledInt32Decoder only
  if the scale is different from 0, i.e. for quantized bias
  tensors

Signed-off-by: Aron Virginas-Tar <Aron.Virginas-Tar@arm.com>
Change-Id: I278061d445d1c549c7ace11f51aa172ce7c691ae

1 files changed, 4 insertions, 0 deletions

diff --git a/src/backends/reference/workloads/Encoders.hpp b/src/backends/reference/workloads/Encoders.hpp
index ed92393cdb..f0e40d224b 100644
--- a/src/backends/reference/workloads/Encoders.hpp
+++ b/src/backends/reference/workloads/Encoders.hpp
@@ -34,6 +34,10 @@ inline std::unique_ptr<Encoder<float>> MakeEncoder(const TensorInfo& info, void*
                 info.GetQuantizationScale(),
                 info.GetQuantizationOffset());
         }
+        case armnn::DataType::Signed32:
+        {
+            return std::make_unique<Int32Encoder>(static_cast<int32_t*>(data));
+        }
         case armnn::DataType::Float32:
         {
             return std::make_unique<FloatEncoder>(static_cast<float*>(data));