/********************************************************************************
 * 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
 *
 ********************************************************************************/

#include <cassert>

#include "aidge/operator/Reshape.hpp"
#include "aidge/utils/Types.h"

#include "aidge/backend/cpu/operator/ReshapeImpl.hpp"
#include "aidge/backend/cpu/operator/ReshapeImpl_forward_kernels.hpp"

Aidge::NbElts_t Aidge::ReshapeImpl_cpu::getNbRequiredProtected(const Aidge::IOIndex_t /*inputIdx*/) const {
    // this implementation can be in-place
    return 0;
}

void Aidge::ReshapeImpl_cpu::forward() {
    assert(std::static_pointer_cast<Tensor>(mOp.getRawInput(0))->size() == 
           std::static_pointer_cast<Tensor>(mOp.getRawOutput(0))->size()
            && "input must have the same overall size as shape");

    // Find the correct kernel type
    auto kernelFunc = Registrar<ReshapeImplForward_cpu>::create({
        std::static_pointer_cast<Tensor>(mOp.getRawInput(0))->dataType(),
        std::static_pointer_cast<Tensor>(mOp.getRawOutput(0))->dataType()});

    // Call kernel
    kernelFunc(std::static_pointer_cast<Tensor>(mOp.getRawInput(0))->size(),
               std::static_pointer_cast<Tensor>(mOp.getRawInput(0))->getImpl()->rawPtr(),
               std::static_pointer_cast<Tensor>(mOp.getRawOutput(0))->getImpl()->rawPtr());
}