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/Decoders.hpp b/src/backends/reference/workloads/Decoders.hpp
index 328a5eb0f7..dd2b28a50f 100644
--- a/src/backends/reference/workloads/Decoders.hpp
+++ b/src/backends/reference/workloads/Decoders.hpp
@@ -7,6 +7,7 @@
 
 #include "BaseIterator.hpp"
 #include "FloatingPointConverter.hpp"
+#include "TensorUtils.hpp"
 
 #include <boost/assert.hpp>
 
@@ -21,6 +22,14 @@ inline std::unique_ptr<Decoder<float>> MakeDecoder(const TensorInfo& info, const
 {
     switch(info.GetDataType())
     {
+        case armnn::DataType::QuantizedSymm8PerAxis:
+        {
+            std::pair<unsigned int, std::vector<float>> params = armnnUtils::GetPerAxisParams(info);
+            return std::make_unique<QSymm8PerAxisDecoder>(
+                static_cast<const int8_t*>(data),
+                params.second,
+                params.first);
+        }
         case DataType::QuantisedAsymm8:
         {
             return std::make_unique<QASymm8Decoder>(
@@ -55,7 +64,7 @@ inline std::unique_ptr<Decoder<float>> MakeDecoder(const TensorInfo& info, const
         }
         default:
         {
-            BOOST_ASSERT_MSG(false, "Not supported Data Type!");
+            BOOST_ASSERT_MSG(false, "Unsupported Data Type!");
             break;
         }
     }