text: /*******************************************************************************
  * Copyright 2019 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 LNORM_HPP
  #define LNORM_HPP
  
  #include <assert.h>
  #include <limits.h>
  #include <numeric>
  #include <stdint.h>
  
  #include <iostream>
  
  #include "common.hpp"
  #include "dnn_types.hpp"
  #include "dnnl_common.hpp"
  #include "dnnl_debug.hpp"
  #include "dnnl_memory.hpp"
  #include "perf_report.hpp"
  
  namespace lnorm {
  
  enum check_alg_t { ALG_0, ALG_1, ALG_AUTO };
  check_alg_t str2check_alg(const char *str);
  const char *check_alg2str(check_alg_t alg);
  
  using flags_t = unsigned;
  const flags_t GLOB_STATS = dnnl_use_global_stats;
  const flags_t USE_SCALESHIFT = dnnl_use_scaleshift;
  flags_t str2flags(const char *str);
  const char *flags2str(flags_t flags);
  
  struct prb_t {
      prb_t(const dims_t &dims, dnnl_format_tag_t tag, dnnl_format_tag_t stat_tag,
              dir_t dir, dnnl_data_type_t dt, flags_t flags, bool inplace,
              const attr_t &attr, check_alg_t check_alg)
          : check_alg(check_alg)
          , dims(dims)
          , tag(tag)
          , stat_tag(stat_tag)
          , dir(dir)
          , dt(dt)
          , flags(flags)
          , inplace(inplace)
          , attr(attr)
          , ops(0) {
          n = std::accumulate(
                  dims.begin(), dims.end() - 1, 1, std::multiplies<int64_t>());
          c = dims[dims.size() - 1];
          eps = 1.f / 16;
          count_ops();
      }
      ~prb_t() {}
  
      check_alg_t check_alg;
      int64_t n, c;
      dims_t dims;
      dnnl_format_tag_t tag, stat_tag;
      dir_t dir;
      dnnl_data_type_t dt;
      flags_t flags;
      bool inplace;
      attr_t attr;
      float eps;
      double ops;
  
      void count_ops() {
          if (ops > 0) return;
          bool use_scaleshift = flags & USE_SCALESHIFT;
          if (dir & FLAG_FWD) {
              ops = sizeof_dt(dt)
                      * ((2 - inplace) * n * c + 2 * n + use_scaleshift * 2 * c);
          } else {
              ops = sizeof_dt(dt)
                      * ((3 - inplace) * n * c + 2 * n + use_scaleshift * 2 * c
                              + 2 * c);
          }
      };
  };
  
  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);
      }
  
      virtual void dump_desc_csv(std::ostream &s) const override {
          s << p_->dims;
      }
  
      virtual void dump_flags(std::ostream &s) const override {
          s << flags2str(p_->flags);
      }
  
      virtual double ops() const override { return p_->ops; }
      virtual const attr_t *attr() const override { return &p_->attr; }
      virtual const dir_t *dir() const override { return &p_->dir; }
      virtual const dnnl_data_type_t *dt() const override { return &p_->dt; }
      virtual const dnnl_format_tag_t *tag() const override { return &p_->tag; }
      virtual const dnnl_format_tag_t *stat_tag() const override {
          return &p_->stat_tag;
      }
  
  private:
      const prb_t *p_ = NULL;
  };
  
  extern const char *skip_impl; /* NULL or "" means do not skip anything */
  
  void compute_ref_fwd(const prb_t *p, const dnn_mem_t &src, dnn_mem_t &mean,
          dnn_mem_t &var, const dnn_mem_t &ss, dnn_mem_t &dst);
  void compute_ref_bwd(const prb_t *p, const dnn_mem_t &src,
          const dnn_mem_t &mean, const dnn_mem_t &var, const dnn_mem_t &d_dst,
          const dnn_mem_t &ss, dnn_mem_t &d_src, dnn_mem_t &d_ss);
  
  int doit(const prb_t *p, res_t *res);
  int bench(int argc, char **argv);
  
  } // namespace lnorm
  
  #endif
  