Add and Sub int8 and uint8 implementation

Context

Add And Sub int8 and uint8 implementation were required for quantized onnx models import.

See aidge_onnx issues: aidge_onnx#42

Modified files

• AddImpl_kernels.hpp and SubImpl_Kernels.hpp, added implementation for uint8 and int8;

include/aidge/backend/cpu/operator/AddImpl_kernels.hpp

@@ -48,6 +48,12 @@ REGISTRAR(AddImpl_cpu,
 REGISTRAR(AddImpl_cpu,
     {ImplSpec::IOSpec{DataType::Any}, ImplSpec::IOSpec{DataType::Float64}},
     {ProdConso::inPlaceModel, Aidge::AddImpl_cpu_forward_kernel<double, double>, nullptr});
+REGISTRAR(AddImpl_cpu,
+    {ImplSpec::IOSpec{DataType::Any}, ImplSpec::IOSpec{DataType::Int8}},
+    {ProdConso::inPlaceModel, Aidge::AddImpl_cpu_forward_kernel<std::int8_t, std::int8_t>, nullptr});
+REGISTRAR(AddImpl_cpu,
+    {ImplSpec::IOSpec{DataType::Any}, ImplSpec::IOSpec{DataType::UInt8}},
+    {ProdConso::inPlaceModel, Aidge::AddImpl_cpu_forward_kernel<std::uint8_t, std::uint8_t>, nullptr});
 REGISTRAR(AddImpl_cpu,
     {ImplSpec::IOSpec{DataType::Any}, ImplSpec::IOSpec{DataType::Int32}},
     {ProdConso::inPlaceModel, Aidge::AddImpl_cpu_forward_kernel<std::int32_t, std::int32_t>, nullptr});