/*******************************************************************************
* Copyright 2021 Intel Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/

#include "graph/backend/dnnl/kernels/binary.hpp"
#include "graph/backend/dnnl/patterns/fusions.hpp"
#include "graph/backend/dnnl/patterns/pattern_matcher_pass.hpp"
#include "graph/backend/dnnl/patterns/utils.hpp"

#include "graph/utils/pm/pbuilder.hpp"

namespace dnnl {
namespace impl {
namespace graph {
namespace dnnl_impl {
namespace pattern {

namespace pm = graph::utils::pm;
using in_edges_t = pm::in_edges_t;
using pb_graph_t = pm::pb_graph_t;
using FCreatePattern = graph::pass::FCreatePattern;

DNNL_BACKEND_REGISTER_PATTERN_DEF_BEGIN(binary_fusion)

DNNL_BACKEND_REGISTER_PATTERN_MATCHER_PASS(dnnl, fp_reciprocal_multiply)
        .set_priority(8.2f)
        .set_kind(partition_kind_t::binary_post_ops)
        .set_attr<FCreatePattern>("FCreatePattern",
                [](const std::shared_ptr<pb_graph_t> &pgraph) -> void {
                    auto reciprocal
                            = pgraph->append_op(graph::op_kind::Reciprocal);
                    pgraph->append_op(graph::op_kind::Multiply,
                            in_edges_t {in_edge(0, reciprocal, 0)});
                })
        .set_attr<FCreateKernel>("FCreateKernel",
                []() -> kernel_ptr { return std::make_shared<binary_t>(); });

// TODO(zitian): wait for the implementation of comparison ops:
//      Gt, Ge, Le, Lt, Eq, Ne
DNNL_BACKEND_REGISTER_PATTERN_MATCHER_PASS(dnnl, fp_binary_post_ops)
        .set_priority(8.3f)
        .set_kind(partition_kind_t::binary_post_ops)
        .set_attr<FCreatePattern>("FCreatePattern",
                [](const std::shared_ptr<pb_graph_t> &pgraph) -> void {
                    auto binary_op
                            = pgraph->append_alternation(get_binary_ops());

                    auto post_subgraph = std::make_shared<pb_graph_t>();
                    auto alternative_post_op
                            = post_subgraph->append_alternation(
                                    get_unary_binary_ops());
                    alternative_post_op->allow_internal_inputs();
                    post_subgraph->create_input_port(0, alternative_post_op, 0);
                    post_subgraph->create_output_port(
                            0, alternative_post_op, 0);

                    pgraph->append_repetition(post_subgraph, {0, 0}, 1,
                            MAX_REPETITION, {in_edge(0, binary_op, 0)});
                })
        .set_attr<FCreateKernel>("FCreateKernel",
                []() -> kernel_ptr { return std::make_shared<binary_t>(); });

DNNL_BACKEND_REGISTER_PATTERN_DEF_END

} // namespace pattern
} // namespace dnnl_impl
} // namespace graph
} // namespace impl
} // namespace dnnl
