Fix/PowBackwardKernel

Context

Fixes Pow Backward Kernel

Fixes #22 (closed)

Modified files

• PowImpl_backward_kernels.hpp, PowImpl.hpp, PowImpl.cpp and Test_PowImpl.cpp, add Pow Backward kernel and unit tests;

TODO

• Fix Pow Backward kernel

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

+/********************************************************************************
+ * Copyright (c) 2023 CEA-List
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ ********************************************************************************/
+
+#ifndef AIDGE_CPU_OPERATOR_BITSHIFTIMPL_H_
+#define AIDGE_CPU_OPERATOR_BITSHIFTIMPL_H_
+
+#include "aidge/backend/cpu/operator/OperatorImpl.hpp"
+#include "aidge/operator/BitShift.hpp"
+#include "aidge/utils/Registrar.hpp"
+#include "aidge/utils/Types.h"
+#include "aidge/backend/cpu/data/GetCPUPtr.h"
+#include <memory>
+#include <vector>
+
+namespace Aidge {
+// Operator implementation entry point for the backend
+using BitShiftImpl_cpu = OperatorImpl_cpu<BitShift_Op,
+    void(const BitShift_Op::BitShiftDirection,
+    const std::vector<std::size_t>&, 
+    const std::vector<std::size_t>&, 
+    const std::vector<std::size_t>&, 
+    const void*, 
+    const void*,
+    void*)>;
+    
+    // Implementation entry point registration to Operator
+    REGISTRAR(BitShift_Op,"cpu",Aidge::BitShiftImpl_cpu::create);
+}  // namespace Aidge
+
+#endif /* AIDGE_CPU_OPERATOR_BITSHIFTIMPL_H_ */