text: /*******************************************************************************
  * Copyright 2016-2020 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.
  *******************************************************************************/
  
  #ifndef COMMON_REORDER_PD_HPP
  #define COMMON_REORDER_PD_HPP
  
  #include <assert.h>
  
  #include "c_types_map.hpp"
  #include "engine.hpp"
  #include "primitive.hpp"
  #include "primitive_attr.hpp"
  #include "primitive_desc.hpp"
  #include "type_helpers.hpp"
  #include "utils.hpp"
  
  namespace dnnl {
  namespace impl {
  
  struct reorder_primitive_desc_iface_t : public dnnl_primitive_desc {
      reorder_primitive_desc_iface_t(primitive_desc_t *pd, engine_t *engine,
              engine_t *src_engine, engine_t *dst_engine)
          : dnnl_primitive_desc(pd, engine)
          , src_engine_(src_engine)
          , dst_engine_(dst_engine)
          , scratchpad_engine_(nullptr) {}
  
      reorder_primitive_desc_iface_t(const std::shared_ptr<primitive_desc_t> &pd,
              engine_t *engine, engine_t *src_engine, engine_t *dst_engine)
          : dnnl_primitive_desc(pd, engine)
          , src_engine_(src_engine)
          , dst_engine_(dst_engine)
          , scratchpad_engine_(nullptr) {}
  
      dnnl::impl::engine_t *src_engine() const override { return src_engine_; }
      dnnl::impl::engine_t *dst_engine() const override { return dst_engine_; }
  
      dnnl::impl::engine_t *scratchpad_engine() const override {
          return scratchpad_engine_;
      }
  
      dnnl::impl::status_t query(
              dnnl::impl::query_t what, int idx, void *result) const override {
          auto status = dnnl::impl::status::success;
          switch (what) {
              case dnnl::impl::query::reorder_src_engine:
                  *(dnnl::impl::engine_t **)result = src_engine();
                  break;
              case dnnl::impl::query::reorder_dst_engine:
                  *(dnnl::impl::engine_t **)result = dst_engine();
                  break;
              default: status = dnnl_primitive_desc::query(what, idx, result);
          }
          return status;
      }
  
      status_t create_primitive_iface(
              std::pair<primitive_iface_t *, bool> &primitive_iface)
              const override {
          // Step 1: create impl::primitive_t or get it from primitive cache
          std::pair<std::shared_ptr<primitive_t>, bool> p;
          auto status = pd_->create_primitive(p, engine());
          if (status != status::success) return status;
          // Step 2: create primitive_iface_t, init and return it to user
          primitive_iface_t *p_iface = nullptr;
          CHECK(safe_ptr_assign(p_iface,
                  new primitive_iface_t(
                          p.first, engine(), src_engine_, dst_engine_)));
          status = p_iface->init();
          if (status != status::success) {
              p_iface->release();
              return status;
          }
          primitive_iface = std::make_pair(p_iface, p.second);
          return status::success;
      }
  
  private:
      dnnl::impl::engine_t *src_engine_;
      dnnl::impl::engine_t *dst_engine_;
      dnnl::impl::engine_t *scratchpad_engine_;
  };
  
  struct reorder_pd_t : public primitive_desc_t {
      reorder_pd_t(const primitive_attr_t *attr, engine_kind_t src_engine_kind,
              const memory_desc_t *src_md, engine_kind_t dst_engine_kind,
              const memory_desc_t *dst_md)
          : primitive_desc_t(attr, primitive_kind::reorder)
          , src_md_(*src_md)
          , dst_md_(*dst_md) {
  
          // Fill a desc that is intended for internal use only
          desc_ = reorder_desc_t();
          desc_.primitive_kind = primitive_kind::reorder;
          desc_.src_md = src_md_;
          desc_.dst_md = dst_md_;
          desc_.src_engine_kind = src_engine_kind;
          desc_.dst_engine_kind = dst_engine_kind;
      }
  
      const reorder_desc_t *desc() const { return &desc_; }
      const op_desc_t *op_desc() const override {
          return reinterpret_cast<const op_desc_t *>(this->desc());
      }
  
      arg_usage_t arg_usage(int arg) const override {
          if (arg == DNNL_ARG_FROM) return arg_usage_t::input;
  
          if (arg == DNNL_ARG_TO) return arg_usage_t::output;
  
          return primitive_desc_t::arg_usage(arg);
      }
  
      const memory_desc_t *arg_md(int arg) const override {
          switch (arg) {
              case DNNL_ARG_FROM: return src_md(0);
              case DNNL_ARG_TO: return dst_md(0);
              default: return primitive_desc_t::arg_md(arg);
          }
      }
  
      const memory_desc_t *src_md(int index = 0) const override {
          return index == 0 ? &src_md_ : &glob_zero_md;
      }
      const memory_desc_t *dst_md(int index = 0) const override {
          return index == 0 ? &dst_md_ : &glob_zero_md;
      }
  
      int n_inputs() const override { return 1; }
      int n_outputs() const override { return 1; }
  
      float alpha() const { return attr()->output_scales_.scales_[0]; }
      float beta() const {
          const int sum_idx = attr()->post_ops_.find(primitive_kind::sum);
          return sum_idx == -1 ? 0 : attr()->post_ops_.entry_[sum_idx].sum.scale;
      }
  
  protected:
      reorder_desc_t desc_;
      memory_desc_t src_md_;
      memory_desc_t dst_md_;
  };
  
  } // namespace impl
  } // namespace dnnl
  
  #endif
  
  // vim: et ts=4 sw=4 cindent cino+=l0,\:4,N-s
  