IVGCVSW-3835 Create Encoder and Decoder for QSymm8PerAxis

 * Add QuantizedSymm8PerAxis to armnn DataType (types.hpp) and
 * Add Quantize and Dequantize template for int8 in TypeUtils to be able to compute QSymm8 of the weight
 * Create PerAxisIterator for per-axis quantization
 * Create QSymm8PerAxisDecoder
 * Create QSymm8PerAxisEncoder

Signed-off-by: Keith Davis <keith.davis@arm.com>
Change-Id: Ibcfe0288a197b7ee50b543bdbd77b7edb8a547c2

1 files changed, 10 insertions, 1 deletions

diff --git a/src/backends/reference/workloads/Encoders.hpp b/src/backends/reference/workloads/Encoders.hpp
index 2b3a11af06..5c0cffa7ca 100644
--- a/src/backends/reference/workloads/Encoders.hpp
+++ b/src/backends/reference/workloads/Encoders.hpp
@@ -6,6 +6,7 @@
 #pragma once
 
 #include "BaseIterator.hpp"
+#include "TensorUtils.hpp"
 
 #include <boost/assert.hpp>
 
@@ -20,6 +21,14 @@ inline std::unique_ptr<Encoder<float>> MakeEncoder(const TensorInfo& info, void*
 {
     switch(info.GetDataType())
     {
+        case armnn::DataType::QuantizedSymm8PerAxis:
+        {
+            std::pair<unsigned int, std::vector<float>> params = armnnUtils::GetPerAxisParams(info);
+            return std::make_unique<QSymm8PerAxisEncoder>(
+                static_cast<int8_t*>(data),
+                params.second,
+                params.first);
+        }
         case armnn::DataType::QuantisedAsymm8:
         {
             return std::make_unique<QASymm8Encoder>(
@@ -48,7 +57,7 @@ inline std::unique_ptr<Encoder<float>> MakeEncoder(const TensorInfo& info, void*
         }
         default:
         {
-            BOOST_ASSERT_MSG(false, "Cannot encode from float. Not supported target Data Type!");
+            BOOST_ASSERT_MSG(false, "Unsupported target Data Type!");
             break;
         }
     }