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 GPU_OCL_REF_LAYER_NORMALIZATION_HPP
  #define GPU_OCL_REF_LAYER_NORMALIZATION_HPP
  
  #include "common/c_types_map.hpp"
  #include "common/primitive.hpp"
  #include "common/type_helpers.hpp"
  #include "common/utils.hpp"
  #include "gpu/compute/compute.hpp"
  #include "gpu/gpu_layer_normalization_pd.hpp"
  #include "gpu/gpu_primitive.hpp"
  #include "gpu/gpu_resource.hpp"
  #include "gpu/primitive_conf.hpp"
  
  namespace dnnl {
  namespace impl {
  namespace gpu {
  namespace ocl {
  
  struct ref_layer_normalization_fwd_t : public gpu_primitive_t {
      struct pd_t : public gpu_layer_normalization_fwd_pd_t {
          using gpu_layer_normalization_fwd_pd_t::
                  gpu_layer_normalization_fwd_pd_t;
  
          DECLARE_COMMON_PD_T("lnorm_ref:any", ref_layer_normalization_fwd_t);
  
          status_t init(engine_t *engine) {
              using namespace data_type;
  
              auto src_data_t = src_md()->data_type;
              auto dst_data_t = dst_md()->data_type;
  
              bool ok = is_fwd()
                      && (utils::everyone_is(f16, src_data_t, dst_data_t)
                              || utils::everyone_is(bf16, src_data_t, dst_data_t)
                              || utils::everyone_is(f32, src_data_t, dst_data_t))
                      && stat_md()->data_type == f32
                      && check_scale_shift_data_type()
                      && attr()->has_default_values()
                      && set_default_formats_common();
              if (!ok) return status::unimplemented;
  
              return init_conf(engine);
          }
  
          status_t init_conf(engine_t *engine);
          status_t init_kernel_ctx(compute::kernel_ctx_t &kernel_ctx) const;
  
          lnorm_conf_t conf;
      };
  
      ref_layer_normalization_fwd_t(const pd_t *apd) : gpu_primitive_t(apd) {}
  
      status_t init(engine_t *engine) override {
          compute::kernel_ctx_t kernel_ctx;
  
          status_t status = pd()->init_kernel_ctx(kernel_ctx);
          CHECK(status);
  
          create_kernel(engine, &kernel_, "ref_lnorm_fwd", kernel_ctx);
          if (!kernel_) return status::runtime_error;
  
          return status::success;
      }
  
      status_t execute(const exec_ctx_t &ctx) const override {
          return execute_forward(ctx);
      }
  
  private:
      status_t execute_forward(const exec_ctx_t &ctx) const;
      const pd_t *pd() const { return (const pd_t *)primitive_t::pd().get(); }
  
      compute::kernel_t kernel_;
  };
  
  struct ref_layer_normalization_bwd_t : public gpu_primitive_t {
      struct pd_t : public gpu_layer_normalization_bwd_pd_t {
          using gpu_layer_normalization_bwd_pd_t::
                  gpu_layer_normalization_bwd_pd_t;
  
          DECLARE_COMMON_PD_T("lnorm_ref:any", ref_layer_normalization_bwd_t);
  
          status_t init(engine_t *engine) {
              using namespace data_type;
  
              auto src_data_t = src_md()->data_type;
              auto diff_dst_data_t = diff_dst_md()->data_type;
  
              bool ok = is_bwd()
                      && (utils::everyone_is(f32, src_data_t, diff_dst_data_t)
                              || utils::everyone_is(
                                      bf16, src_data_t, diff_dst_data_t))
                      && check_scale_shift_data_type()
                      && set_default_formats_common()
                      && attr()->has_default_values();
              if (!ok) return status::unimplemented;
  
              return init_conf(engine);
          }
  
          status_t init_conf(engine_t *engine);
          status_t init_kernel_ctx(compute::kernel_ctx_t &kernel_ctx) const;
  
          lnorm_conf_t conf;
      };
  
      ref_layer_normalization_bwd_t(const pd_t *apd) : gpu_primitive_t(apd) {}
  
      status_t init(engine_t *engine) override {
          compute::kernel_ctx_t kernel_ctx;
  
          status_t status = pd()->init_kernel_ctx(kernel_ctx);
          CHECK(status);
  
          create_kernel(engine, &kernel_, "ref_lnorm_bwd", kernel_ctx);
          if (pd()->conf.use_scaleshift) {
              create_kernel(engine, &kernel_scaleshift_,
                      "ref_lnorm_bwd_scaleshift", kernel_ctx);
              if (!kernel_scaleshift_) return status::runtime_error;
          }
          if (!kernel_) return status::runtime_error;
  
          return status::success;
      }
  
      status_t execute(const exec_ctx_t &ctx) const override {
          return execute_backward(ctx);
      }
  
  private:
      status_t execute_backward(const exec_ctx_t &ctx) const;
      const pd_t *pd() const { return (const pd_t *)primitive_t::pd().get(); }
  
      compute::kernel_t kernel_scaleshift_;
      compute::kernel_t kernel_;
  };
  
  } // namespace ocl
  } // namespace gpu
  } // namespace impl
  } // namespace dnnl
  
  #endif
  