text: /*******************************************************************************
  * Copyright 2019-2020 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 RESAMPLING_HPP
  #define RESAMPLING_HPP
  
  #include <assert.h>
  #include <limits.h>
  #include <stdint.h>
  
  #include <iostream>
  
  #include "common.hpp"
  #include "dnn_types.hpp"
  #include "dnnl_common.hpp"
  #include "dnnl_memory.hpp"
  #include "perf_report.hpp"
  
  namespace resampling {
  
  enum alg_t { nearest, linear };
  alg_t str2alg(const char *str);
  const char *alg2str(alg_t alg);
  dnnl_alg_kind_t alg2alg_kind(alg_t alg);
  
  struct desc_t {
      int64_t mb, ic;
      int64_t id, ih, iw;
      int64_t od, oh, ow;
      const char *name;
      int ndims;
  };
  
  int str2desc(desc_t *desc, const char *str);
  std::ostream &operator<<(std::ostream &s, const desc_t &d);
  
  struct settings_t {
      settings_t() = default;
  
      // ctor to save certain fields from resetting
      settings_t(const char *perf_template) : settings_t() {
          this->perf_template = perf_template;
      }
  
      desc_t desc {};
  
      std::vector<dir_t> dir {FWD_D};
      std::vector<dnnl_data_type_t> dt {dnnl_f32};
      std::vector<std::string> tag {tag::abx};
      std::vector<alg_t> alg {nearest};
      std::vector<int64_t> mb {0};
  
      const char *perf_template_csv
              = "perf,%engine%,%name%,%dir%,%dt%,%tag%,%alg%,%DESC%,%-time%,%"
                "0time%";
      const char *perf_template_def
              = "perf,%engine%,%name%,%prb%,%-time%,%0time%";
      const char *perf_template = perf_template_def;
  
      void reset() { *this = settings_t(perf_template); }
  };
  
  struct prb_t : public desc_t {
      prb_t(const desc_t &desc, dir_t dir, dnnl_data_type_t dt,
              const std::string &tag, alg_t alg, int64_t mb = 0)
          : desc_t(desc), dir(dir), dt(dt), tag(tag), alg(alg) {
          if (mb) this->mb = mb;
      }
      ~prb_t() {}
  
      dir_t dir;
      dnnl_data_type_t dt;
      std::string tag;
      alg_t alg;
  
      BENCHDNN_DISALLOW_COPY_AND_ASSIGN(prb_t);
  };
  std::ostream &operator<<(std::ostream &s, const prb_t &p);
  
  struct perf_report_t : public base_perf_report_t {
      using base_perf_report_t::base_perf_report_t;
  
      void report(const prb_t *p, const res_t *r, const char *prb_str) {
          p_ = p;
          base_report(r, prb_str);
      }
  
      void dump_alg(std::ostream &s) const override { s << alg2str(p_->alg); }
  
      void dump_desc(std::ostream &s) const override {
          s << static_cast<const desc_t &>(*p_);
      }
  
      void dump_desc_csv(std::ostream &s) const override {
          s << p_->mb << ','
  
            << p_->ic << ',' << p_->id << ',' << p_->ih << ',' << p_->iw << ','
  
            << p_->od << ',' << p_->oh << ',' << p_->ow;
      }
  
      const char *name() const override { return p_->name; }
      const dir_t *dir() const override { return &p_->dir; }
      const dnnl_data_type_t *dt() const override { return &p_->dt; }
      const std::string *tag() const override { return &p_->tag; }
  
  private:
      const prb_t *p_ = NULL;
  };
  
  inline int64_t src_off_f(const prb_t *p, int64_t mb, int64_t ic, int64_t id,
          int64_t ih, int64_t iw) {
      return (((mb * p->ic + ic) * p->id + id) * p->ih + ih) * p->iw + iw;
  }
  
  inline void inv_src_off_f(const prb_t *p, int64_t off, int64_t &mb, int64_t &ic,
          int64_t &id, int64_t &ih, int64_t &iw) {
      iw = off % p->iw;
      off /= p->iw;
      ih = off % p->ih;
      off /= p->ih;
      id = off % p->id;
      off /= p->id;
      ic = off % p->ic;
      off /= p->ic;
      mb = off % p->mb;
      off /= p->mb;
      assert(off == 0);
  }
  
  inline int64_t dst_off_f(const prb_t *p, int64_t mb, int64_t ic, int64_t od,
          int64_t oh, int64_t ow) {
      return (((mb * p->ic + ic) * p->od + od) * p->oh + oh) * p->ow + ow;
  }
  
  inline void inv_dst_off_f(const prb_t *p, int64_t off, int64_t &mb, int64_t &ic,
          int64_t &od, int64_t &oh, int64_t &ow) {
      ow = off % p->ow;
      off /= p->ow;
      oh = off % p->oh;
      off /= p->oh;
      od = off % p->od;
      off /= p->od;
      ic = off % p->ic;
      off /= p->ic;
      mb = off % p->mb;
      off /= p->mb;
      assert(off == 0);
  }
  
  void compute_ref_fwd(const prb_t *p, const dnn_mem_t &src, dnn_mem_t &dst);
  void compute_ref_bwd(
          const prb_t *p, dnn_mem_t &diff_src, const dnn_mem_t &diff_dst);
  
  int compare_src(const prb_t *p, dnn_mem_t &mem_dt, dnn_mem_t &mem_fp, res_t *r);
  int compare_dst(const prb_t *p, dnn_mem_t &mem_dt, dnn_mem_t &mem_fp, res_t *r);
  int fill_dat(const prb_t *p, dnn_mem_t &mem_dt, dnn_mem_t &mem_fp, res_t *r);
  
  int doit(const prb_t *p, res_t *res);
  int bench(int argc, char **argv);
  
  } // namespace resampling
  
  #endif
  