cavis/libnd4j/include/loops/reduce_float.h

/*******************************************************************************
 * Copyright (c) 2015-2018 Skymind, Inc.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Apache License, Version 2.0 which is available at
 * https://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.
 *
 * SPDX-License-Identifier: Apache-2.0
 ******************************************************************************/


#ifndef REDUCE_FLOAT_H
#define REDUCE_FLOAT_H
#include <system/dll.h>
//#include <string>
#include <stdio.h>
#include <helpers/shape.h>
#ifdef _OPENMP
#include <omp.h>
#endif
#include <math/templatemath.h>
#include <system/nd4jmalloc.h>
#include <system/pairwise_util.h>
#include <ops/ops.h>
#include <system/op_boilerplate.h>
#include <memory/Workspace.h>

#pragma once
#ifdef __CUDACC__
#include <cuda.h>
#include <cuda_runtime.h>
#endif


#include "legacy_ops.h"

//an op for the kernel
namespace functions {
    namespace reduce {

/**
 * A reduce function
 * reduces a vector down to
 * a subset of itself
 * via aggregating member
 * elements.
 */
        template<typename X, typename Z>
        class ReduceFloatFunction {

        public:

#ifdef __CUDACC__
            template<typename OpType>
            static __device__ void aggregatePartials(void *sPartials, Nd4jLong tid, Nd4jLong numItems, void *extraParams);

            template<typename OpType>
			static __device__ void execScalarCuda(const void *vx, const Nd4jLong *xShapeInfo, void *extraParams, void *vz, const Nd4jLong *zShapeInfo, void *reductionBuffer, const Nd4jLong *tadOnlyShapeInfo);

            template<typename OpType>
            static __device__ void transformCudaXD(const void *vx, const Nd4jLong *outerXTadShapeInfo, const Nd4jLong *innerXTadShapeInfo, void *extraParams, void *vreductionBuffer, void *vz, const Nd4jLong *zShapeInfo);

            template<typename OpType>
            static __host__ void intermediateScalar(dim3 launchDims, cudaStream_t *stream, const void *vx, const Nd4jLong *xShapeInfo, const Nd4jLong *hXShapeInfo, void *extraParams, void *vz, const Nd4jLong *zShapeInfo, const Nd4jLong *hZShapeInfo, int *dimension, int dimensionLength, void *reductionBuffer, const Nd4jLong *tadOnlyShapeInfo);

            template<typename OpType>
            static __host__ void intermediateXD(dim3 launchDims, cudaStream_t *stream, const void *vx, const Nd4jLong *dXShapeInfo, const Nd4jLong *hXShapeInfo, void *extraParams, void *vreductionBuffer, void *vz, const Nd4jLong *dZShapeInfo, const Nd4jLong *hZShapeInfo, const int* dims);

            static __host__ void execReduceScalar(dim3 launchDims, cudaStream_t *stream, int opNum, const void *vx, const Nd4jLong *xShapeInfo, const Nd4jLong *hXShapeInfo, void *extraParams, void *vz, const Nd4jLong *zShapeInfo, const Nd4jLong *hZShapeInfo, int *dimension, int dimensionLength, void *reductionBuffer, const Nd4jLong *tadOnlyShapeInfo);

            static __host__ void execReduceXD(dim3 launchDims, cudaStream_t *stream, int opNum, const void *vx, const Nd4jLong *dXShapeInfo, const Nd4jLong *hXShapeInfo, void *extraParams, void *vreductionBuffer, void *vz, const Nd4jLong *dZShapeInfo, const Nd4jLong *hZShapeInfo, const int *dims);
#else

            /**
             * Reduce down to 1 number
             * @param vx the input
             * @param xShapeInfo the shape information
             * for the input
             * @param extraParams the extra params
             * @return
             */
            template<typename OpType>
            static _CUDA_H Z execScalar(const void *vx, const Nd4jLong *xShapeInfo, void *extraParams);

            template<typename OpType>
            static _CUDA_H void execScalar(const void *vx, const Nd4jLong *xShapeInfo,
                                           void *extraParams,
                                           void *vz, const Nd4jLong *zShapeInfo);


            static Z execScalar(int opNum,
                                const void *vx, const Nd4jLong *xShapeInfo,
                                void *extraParams);

            static void execScalar(int opNum,
                                   const void *vx, const Nd4jLong *xShapeInfo,
                                   void *extraParams,
                                   void *vz, const Nd4jLong *zShapeInfo);

            static void exec(int opNum, sd::memory::Workspace* workspace,
                             const void *vx, const Nd4jLong *xShapeInfo,
                             void *vextraParams,
                             void *vz, const Nd4jLong *zShapeInfo,
                             const int *dims);

            /**
             * Execute on the cpu
             * @param vx the input data
             * @param xShapeInfo the shape information for vx
             * @param extraParams the extra parameters
             * @param vz the vz buffer
             * @param resultShapeInfoBuffer the shape information
             * @param dimension the dimension to perform
             * the reduce along long
             * @param dimensionLength the length of the dimension buffer
             */


            template<typename OpType>
            static void _CUDA_H exec(sd::memory::Workspace* workspace,
                                    const void *vx, const Nd4jLong *xShapeInfo,
                                    void *extraParams,
                                    void *vz, const Nd4jLong *zShapeInfo,
                                    const int* dims);

            /**
            * CPU implementation
            * @param vx the input data
            * @param xShapeInfo the shape information for
            * the input data
            * @param extraParams the extra parameters for the problem
            * @param vz the vz buffer
            * @param zShapeInfo the shape information
            */
            template<typename OpType>
            static void _CUDA_H exec(const void *vx, const Nd4jLong *xShapeInfo,
                             void *extraParams,
                             void *vz, const Nd4jLong *zShapeInfo);



            /**
            * Reduce down to 1 number
            * @param vx the input
            * @param xShapeInfo the shape information
            * for the input
            * @param extraParams the extra params
            * @return
            */
            template<typename OpType>
            static Z _CUDA_H execScalar(const void *vx, Nd4jLong xElementWiseStride, Nd4jLong length, void *extraParams);
#endif
        };


#ifdef __CUDACC__
        /**
    *
    * @param extraParams
    * @param sPartials
    * @param sMemSize
    */
        template<typename T>
        __device__ void initializeShared(T *extraParams, T **sPartials, int sMemSize);

#endif

    }

}

#endif