/*******************************************************************************
 *
 * MIT License
 *
 * Copyright (c) 2017 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 *******************************************************************************/
#ifndef GUARD_MIOPEN_CONV_BN_ACTIV_INFER_DRIVER_HPP
#define GUARD_MIOPEN_CONV_BN_ACTIV_INFER_DRIVER_HPP

#include "InputFlags.hpp"
#include "driver.hpp"
#include "miopen_ConvBatchNormActivHost.hpp"
#include "mloNeuronHost.hpp"
#include "random.hpp"
#include "tensor_driver.hpp"
#include "timer.hpp"
#include "util_driver.hpp"
#include "conv_common.hpp"

#include "../test/verify.hpp"
#include "../test/cpu_conv.hpp"
#include "../test/cpu_bias.hpp"

#include <miopen/env.hpp>
#include <miopen/errors.hpp>
#include <miopen/handle.hpp>
#include <miopen/miopen.h>
#include <miopen/tensor.hpp>

#include <algorithm>
#include <cassert>
#include <cmath>
#include <cstdlib>
#include <float.h>
#include <memory>
#include <numeric>
#include <vector>

#define MIO_BN_DEBUG 0
#define MIO_BN_MAX_DEBUGLOOP 65536

#undef EPSILON
#define EPSILON 1e-6

#define CBA_DEBUG_VALUES 0

MIOPEN_DECLARE_ENV_VAR_BOOL(MIOPEN_DRIVER_PAD_BUFFERS_2M)

//"Fusion mode (cbna = 0, cna = 1, na = 2, cn = 3, cba = 4, ca = 5, cb = 6) (Default=cbna)",
typedef enum
{
    miopen_fusion_cbna = 0,
    miopen_fusion_cna  = 1,
    miopen_fusion_na   = 2,
    miopen_fusion_cn   = 3,
    miopen_fusion_cba  = 4,
    miopen_fusion_ca   = 5,
    miopen_fusion_cb   = 6,
} fusionMode_t;

template <typename Tgpu, typename Tref>
class CBAInferFusionDriver : public Driver
{
public:
    CBAInferFusionDriver() : Driver()
    {
        miopenCreateTensorDescriptor(&inputTensor);
        miopenCreateTensorDescriptor(&weightTensor);
        miopenCreateTensorDescriptor(&outputTensor);
        miopenCreateTensorDescriptor(&biasTensor);
        miopenCreateTensorDescriptor(&biasScaleTensor);
        miopenCreateConvolutionDescriptor(&convDesc);
        miopenCreateActivationDescriptor(&activDesc);
        miopenCreateOperatorArgs(&fusionArgs);

        workspace_fwd_dev = nullptr;

        InitDataType<Tgpu>();
        initTiming();
        iters = 0;
    }

    void ValidateLayoutInputParameters(std::string layout_type);
    int ChkLayout_ShortName();

    int AddCmdLineArgs() override;
    int ParseCmdLineArgs(int argc, char* argv[]) override;
    InputFlags& GetInputFlags() override { return inflags; }

    int GetandSetData() override;
    std::vector<int> GetInputTensorLengthsFromCmdLine();
    std::vector<int> GetOutputTensorLengths();
    std::vector<int> GetWeightTensorLengthsFromCmdLine();
    std::vector<int> GetModeFromCmdLine();

    int SetActivationDescriptorFromCmdLineArgs();
    int SetConvDescriptorFromCmdLineArgs();

    int SetBNParametersFromCmdLineArgs();

    int AllocateBuffersAndCopy() override;

    int RunForwardGPU() override;
    int RunForwardCPU();

    int RunBackwardGPU() override { return 0; };
    int RunBackwardCPU() { return 0; };

    void runGPUConvBatchNormActivInference();
    void runGPUConvActivInference();
    void runGPUBatchNormActivInference();

    void runGPUBNFwdInference();
    void runCPUBNFwdInference();

    void runGPUActivFwdInference();
    void runCPUActivFwdInference();

    void runCPUConvFwdInference();

    void runGPUConvBiasInference();
    void runGPUFusedConvBiasInference();
    void runCPUConvBiasInference();

    int VerifyBackward() override { return 0; };
    int VerifyForward() override;

    Timer t;
    double fulltime;
    float lowtime;
    float avgtime;
    float time;
    int iters;

    void initTiming()
    {
        fulltime = 0.;
        lowtime  = 100000000.0;
        avgtime  = 0.;
        time     = 0.0;
        return;
    }

    void startTiming()
    {
        START_TIME
        return;
    }

    void finishTiming(int i)
    {
        if(inflags.GetValueStr("time") == "1")
        {
            time = 0.0;
            miopenGetKernelTime(GetHandle(), &time);
            lowtime = (time < lowtime) ? time : lowtime;
            if(iters > 1 && i > 0)
                avgtime += time;
        }

        miopen::deref(GetHandle()).Finish();
        STOP_TIME

        if(WALL_CLOCK)
        {
            if(iters > 1 && i > 0)
                fulltime += t.gettime_ms();
            else if(iters == 1)
                fulltime = t.gettime_ms();
            // else do nothing, drop the first iteration
        }
        return;
    }

    ~CBAInferFusionDriver() override
    {
        miopenDestroyTensorDescriptor(outputTensor);
        miopenDestroyTensorDescriptor(inputTensor);
        miopenDestroyTensorDescriptor(weightTensor);
        miopenDestroyTensorDescriptor(biasTensor);
        miopenDestroyTensorDescriptor(biasScaleTensor);
        miopenDestroyActivationDescriptor(activDesc);
        miopenDestroyConvolutionDescriptor(convDesc);

        miopenDestroyFusionPlan(fusePlanDesc);
        miopenDestroyOperatorArgs(fusionArgs);
    }

private:
    miopenBatchNormMode_t bn_mode;
    int bias_mode   = 0;
    int fusion_mode = 0;
    int spatial_dim = 2;
    bool estimatedMeanVar;
    bool useBatchNorm = false;
    unsigned char back;

    InputFlags inflags;

    miopenTensorDescriptor_t inputTensor;
    miopenTensorDescriptor_t weightTensor;
    miopenTensorDescriptor_t biasScaleTensor;
    miopenTensorDescriptor_t biasTensor;
    miopenTensorDescriptor_t outputTensor;

    miopenActivationDescriptor_t activDesc;
    miopenConvolutionDescriptor_t convDesc;

    std::unique_ptr<GPUMem> in_dev;
    std::unique_ptr<GPUMem> conv_res_dev;
    std::unique_ptr<GPUMem> bn_res_dev;
    std::unique_ptr<GPUMem> wei_dev;
    std::unique_ptr<GPUMem> out_dev;
    std::unique_ptr<GPUMem> scale_dev;
    std::unique_ptr<GPUMem> bias_dev;
    std::unique_ptr<GPUMem> workspace_fwd_dev;
    std::unique_ptr<GPUMem> runningMean_dev;
    std::unique_ptr<GPUMem> runningVariance_dev;
    std::unique_ptr<GPUMem> saveMean_dev;
    std::unique_ptr<GPUMem> saveInvVariance_dev;
    std::unique_ptr<GPUMem> b_dev;
    std::vector<Tgpu> b;

    std::vector<Tgpu> in;
    std::vector<Tgpu> out;
    std::vector<Tgpu> wei;
    std::vector<Tgpu> conv_res;
    std::vector<Tgpu> bn_res;
    std::vector<Tref> in_host;
    std::vector<Tref> wei_host;
    std::vector<Tref> conv_res_host;
    std::vector<Tref> bn_res_host;
    std::vector<Tref> out_host;
    std::vector<float> scale;
    std::vector<float> bias;
    std::vector<Tref> bias_host;
    std::vector<float> runningMean;
    std::vector<float> runningVariance;
    int createSaveBuffers();
    int createRunningBuffers();

    miopenStatus_t miopenError;
    miopenFusionPlanDescriptor_t fusePlanDesc;
    miopenFusionOpDescriptor_t bNormOp;
    miopenFusionOpDescriptor_t convoOp;
    miopenFusionOpDescriptor_t biasOp;
    miopenFusionOpDescriptor_t activOp;
    miopenOperatorArgs_t fusionArgs;
};

template <typename Tgpu, typename Tref>
int CBAInferFusionDriver<Tgpu, Tref>::ChkLayout_ShortName()
{
    // check for short name of layout type
    if((inflags.FindShortName("in_layout") == 'I') &&
       (inflags.FindShortName("out_layout") == 'O') && (inflags.FindShortName("fil_layout") == 'f'))
    {
        // do noting
        // found valid short names
        return 0;
    }
    else
    {
        MIOPEN_THROW(miopenStatusBadParm, "Invalid Short Name!");
    }
}

template <typename Tgpu, typename Tref>
void CBAInferFusionDriver<Tgpu, Tref>::ValidateLayoutInputParameters(std::string layout_value)
{
    if((ChkLayout_ShortName()))
    {
        MIOPEN_THROW(miopenStatusBadParm,
                     "Invalid Layout Short Name = " + std::to_string(ChkLayout_ShortName()));
    }
    else
    {
        if((layout_value.compare("NCHW") == 0) || (layout_value.compare("NHWC") == 0) ||
           (layout_value.compare("CHWN") == 0) || (layout_value.compare("NCDHW") == 0) ||
           (layout_value.compare("NDHWC") == 0))
        {
            // do nothing,Values are matching as defined in Lib.
        }
        else
        {
            MIOPEN_THROW(miopenStatusBadParm, "Invalid Layout Parameter Value - " + layout_value);
        }
    }
}

template <typename Tgpu, typename Tref>
int CBAInferFusionDriver<Tgpu, Tref>::ParseCmdLineArgs(int argc, char* argv[])
{
    inflags.Parse(argc, argv);

    spatial_dim = inflags.GetValueInt("spatial_dim") == 3 ? 3 : 2;

    const std::string default_layout = (spatial_dim == 2) ? "NCHW" : "NCDHW";

    if(inflags.GetValueStr("in_layout").empty())
    {
        inflags.SetValue("in_layout", default_layout);
    }
    else
    {
        std::string in_layoutValue = inflags.GetValueStr("in_layout");
        ValidateLayoutInputParameters(in_layoutValue);
        inflags.SetValue("in_layout", in_layoutValue);
    }
    // fil layout argument value check
    if(inflags.GetValueStr("fil_layout").empty())
    {
        inflags.SetValue("fil_layout", default_layout);
    }
    else
    {
        std::string fil_layoutValue = inflags.GetValueStr("fil_layout");
        ValidateLayoutInputParameters(fil_layoutValue);
        inflags.SetValue("fil_layout", fil_layoutValue);
    }
    // out layout argument check
    if(inflags.GetValueStr("out_layout").empty())
    {
        inflags.SetValue("out_layout", default_layout);
    }
    else
    {
        std::string out_layoutValue = inflags.GetValueStr("out_layout");
        ValidateLayoutInputParameters(out_layoutValue);
        inflags.SetValue("out_layout", out_layoutValue);
    }

    if(inflags.GetValueInt("time") == 1)
    {
        miopenEnableProfiling(GetHandle(), true);
    }

    fusion_mode = inflags.GetValueInt("fusion_mode");
    if(fusion_mode > 6 || fusion_mode < 0)
    {
        MIOPEN_THROW(miopenStatusBadParm, "Fusion mode out of range");
    }
    if(fusion_mode != miopen_fusion_cba && fusion_mode != miopen_fusion_ca &&
       fusion_mode != miopen_fusion_cb)
        useBatchNorm = true;
    else
        useBatchNorm = false;

    if(fusion_mode == miopen_fusion_cbna || fusion_mode == miopen_fusion_cba ||
       fusion_mode == miopen_fusion_cb)
        bias_mode = 1;
    else
        bias_mode = 0;

    return miopenStatusSuccess;
}

template <typename Tgpu, typename Tref>
int CBAInferFusionDriver<Tgpu, Tref>::SetActivationDescriptorFromCmdLineArgs()
{

    miopenActivationMode_t mode;
    double Alpha = inflags.GetValueDouble("alpha");
    double Beta  = inflags.GetValueDouble("beta");
    double Gamma = inflags.GetValueDouble("gamma");
    mode         = static_cast<miopenActivationMode_t>(inflags.GetValueInt("activMode"));

    return (miopenSetActivationDescriptor(activDesc, mode, Alpha, Beta, Gamma));
}

template <typename Tgpu, typename Tref>
std::vector<int> CBAInferFusionDriver<Tgpu, Tref>::GetWeightTensorLengthsFromCmdLine()
{
    int wei_n       = inflags.GetValueInt("out_channels");
    int group_count = std::max(inflags.GetValueInt("group_count"), 1);
    int wei_c       = inflags.GetValueInt("in_channels");
    int wei_h       = inflags.GetValueInt("fil_h");
    int wei_w       = inflags.GetValueInt("fil_w");

    if(group_count > 1)
    {
        if(wei_c % group_count != 0 || wei_n % group_count != 0 || group_count > wei_c ||
           group_count > wei_n)
        {
            MIOPEN_THROW("Invalid group number\n");
        }
    }

    wei_c /= group_count;

    if(spatial_dim == 3)
    {
        int wei_d = inflags.GetValueInt("fil_d");
        return std::vector<int>({wei_n, wei_c, wei_d, wei_h, wei_w});
    }
    return std::vector<int>({wei_n, wei_c, wei_h, wei_w});
}

template <typename Tgpu, typename Tref>
int CBAInferFusionDriver<Tgpu, Tref>::GetandSetData()
{

    SetBNParametersFromCmdLineArgs();
    SetConvDescriptorFromCmdLineArgs();
    SetActivationDescriptorFromCmdLineArgs();

    std::vector<int> in_len  = GetInputTensorLengthsFromCmdLine();
    std::vector<int> wei_len = GetWeightTensorLengthsFromCmdLine();

    SetTensorNdVector(
        inputTensor, in_len, StringToLayoutType(inflags.GetValueStr("in_layout")), data_type);

    miopenCreateFusionPlan(&fusePlanDesc, miopenVerticalFusion, inputTensor);

    SetTensorNdVector(
        weightTensor, wei_len, StringToLayoutType(inflags.GetValueStr("fil_layout")), data_type);

    std::vector<int> out_len{};
    if(fusion_mode != miopen_fusion_na)
    {
        out_len = GetOutputTensorLengths();
    }
    else
    {
        out_len = in_len;
    }
    SetTensorNdVector(
        outputTensor, out_len, StringToLayoutType(inflags.GetValueStr("out_layout")), data_type);

    if(bias_mode)
    {
        std::vector<int> b_len(2 + spatial_dim, 1);
        b_len[1] = out_len[1];

        SetTensorNd(biasTensor, b_len, data_type);
    }

    return miopenStatusSuccess;
}

template <typename Tgpu, typename Tref>
int CBAInferFusionDriver<Tgpu, Tref>::AddCmdLineArgs()
{
    inflags.AddInputFlag(
        "spatial_dim", '_', "2", "convolution spatial dimensions (Default=2)", "int");
    inflags.AddInputFlag("in_layout",
                         'I',
                         "",
                         "Input Layout (Default=NCHW for 2d conv, NCDHW for 3d conv)",
                         "string",
                         true);
    inflags.AddInputFlag("out_layout",
                         'O',
                         "",
                         "Output Layout (Default=NCHW for 2d conv, NCDHW for 3d conv)",
                         "string",
                         true);
    inflags.AddInputFlag("fil_layout",
                         'f',
                         "",
                         "Filter Layout (Default=NCHW for 2d conv, NCDHW for 3d conv)",
                         "string",
                         true);
    inflags.AddInputFlag("batchsize", 'n', "32", "Mini-batch size (Default=32)", "int");
    inflags.AddInputFlag("in_channels", 'c', "3", "Number of Input Channels (Default=3)", "int");
    inflags.AddInputFlag("in_d", '!', "1", "Input Depth (Default=1)", "int");
    inflags.AddInputFlag("in_h", 'H', "32", "Input Height (Default=32)", "int");
    inflags.AddInputFlag("in_w", 'W', "32", "Input Width (Default=32)", "int");
    inflags.AddInputFlag(
        "out_channels", 'k', "32", "Number of Output Channels (Default=32)", "int");
    inflags.AddInputFlag(
        "group_count", 'g', "1", "Number of groups in convolution (Default=1)", "int");
    inflags.AddInputFlag("fil_d", '@', "3", "Filter Depth (Default=3)", "int"); // should be 1?
    inflags.AddInputFlag("fil_h", 'y', "3", "Filter Height (Default=3)", "int");
    inflags.AddInputFlag("fil_w", 'x', "3", "Filter Width (Default=3)", "int");
    inflags.AddInputFlag("conv_stride_d", '#', "1", "Convolution Stride Depth (Default=1)", "int");
    inflags.AddInputFlag(
        "conv_stride_h", 'u', "1", "Convolution Stride Vertical (Default=1)", "int");
    inflags.AddInputFlag(
        "conv_stride_w", 'v', "1", "Convolution Stride Horizontal (Default=1)", "int");
    inflags.AddInputFlag("pad_d", '$', "0", "Zero Padding Depth (Default=0)", "int");
    inflags.AddInputFlag("pad_h", 'p', "0", "Zero Padding Height (Default=0)", "int");
    inflags.AddInputFlag("pad_w", 'q', "0", "Zero Padding Width (Default=0)", "int");
    inflags.AddInputFlag("pad_val", 'r', "0", "Padding Value (Default=0)", "int");
    inflags.AddInputFlag("alpha", 'A', "1.0", "Alpha (Default=1.0)", "float");
    inflags.AddInputFlag("beta", 'B', "0.", "Beta (Default=0.)", "float");
    inflags.AddInputFlag("gamma", 'G', "1", "Activation gamma (Default=1)", "double");
    inflags.AddInputFlag("iter", 'i', "1", "Number of Iterations (Default=1)", "int");
    inflags.AddInputFlag("verify", 'V', "1", "Verify Each Layer (Default=1)", "int");
    inflags.AddInputFlag("time", 't', "0", "Time Each Layer (Default=0)", "int");

    /*inflags.AddInputFlag("printconv", 'P', "1", "Print Convolution Dimensions (Default=1)",
     * "int");*/

    inflags.AddInputFlag(
        "activMode", 'm', "3", "Activation Mode (relu,..., see spec) (Default=3(relu))", "int");
    inflags.AddInputFlag("bnMode",
                         'M',
                         "0",
                         "Normalization Mode (per-activation (0) or spatial (1)) (Default=0)",
                         "int");
    inflags.AddInputFlag(
        "wall", 'w', "0", "Wall-clock Time Each Layer, Requires time == 1 (Default=0)", "int");
    inflags.AddInputFlag("dilation_d", '^', "1", "Dilation of Filter Depth (Default=1)", "int");
    inflags.AddInputFlag("dilation_h", 'l', "1", "Dilation of Filter Height (Default=1)", "int");
    inflags.AddInputFlag("dilation_w", 'j', "1", "Dilation of Filter Width (Default=1)", "int");

    /*inflags.AddInputFlag("search", 's', "0", "Search Kernel Config (Default=0)", "int");*/

    inflags.AddInputFlag(
        "pad_mode", 'z', "conv", "Padding Mode (same, valid, default) (Default=default)", "str");

    inflags.AddInputFlag(
        "fusion_mode",
        'J',
        "0",
        "Fusion mode (cbna = 0, cna = 1, na = 2, cn = 3, cba = 4, ca = 5, cb = 6) (Default=cbna)",
        "int");
    inflags.AddInputFlag("dot_graph",
                         'D',
                         "",
                         "Write out the fusion metadata graph for the specified operator",
                         "str");

    return miopenStatusSuccess;
}

template <typename Tgpu, typename Tref>
std::vector<int> CBAInferFusionDriver<Tgpu, Tref>::GetInputTensorLengthsFromCmdLine()
{
    int in_n = inflags.GetValueInt("batchsize");
    int in_c = inflags.GetValueInt("in_channels");
    int in_d = inflags.GetValueInt("in_d");
    int in_h = inflags.GetValueInt("in_h");
    int in_w = inflags.GetValueInt("in_w");

    if(spatial_dim == 3)
        return std::vector<int>({in_n, in_c, in_d, in_h, in_w});
    return std::vector<int>({in_n, in_c, in_h, in_w});
}

template <typename Tgpu, typename Tref>
int CBAInferFusionDriver<Tgpu, Tref>::SetBNParametersFromCmdLineArgs()
{

    // batch norm mode type
    if(inflags.GetValueInt("bnMode") == 0)
    {
        bn_mode = miopenBNPerActivation;
    }
    else if(inflags.GetValueInt("bnMode") == 1)
    {
        bn_mode = miopenBNSpatial;
    }
    else
    {
        MIOPEN_THROW(miopenStatusBadParm, "Incorrect Batch Normalization Mode");
    }

    return miopenStatusSuccess;
}

template <typename Tgpu, typename Tref>
int CBAInferFusionDriver<Tgpu, Tref>::SetConvDescriptorFromCmdLineArgs()
{

    miopenConvolutionMode_t mode;

    std::vector<int> in_spatial_lens(spatial_dim);
    std::vector<int> wei_spatial_lens(spatial_dim);
    std::vector<int> pads(spatial_dim);
    std::vector<int> strides(spatial_dim);
    std::vector<int> dilations(spatial_dim);
    std::vector<int> trans_output_pads(spatial_dim);

    if(spatial_dim == 2)
    {
        in_spatial_lens[0]  = inflags.GetValueInt("in_h");
        in_spatial_lens[1]  = inflags.GetValueInt("in_w");
        wei_spatial_lens[0] = inflags.GetValueInt("fil_h");
        wei_spatial_lens[1] = inflags.GetValueInt("fil_w");
        pads[0]             = inflags.GetValueInt("pad_h");
        pads[1]             = inflags.GetValueInt("pad_w");
        strides[0]          = inflags.GetValueInt("conv_stride_h");
        strides[1]          = inflags.GetValueInt("conv_stride_w");
        dilations[0]        = inflags.GetValueInt("dilation_h");
        dilations[1]        = inflags.GetValueInt("dilation_w");
    }
    else if(spatial_dim == 3)
    {
        in_spatial_lens[0]  = inflags.GetValueInt("in_d");
        in_spatial_lens[1]  = inflags.GetValueInt("in_h");
        in_spatial_lens[2]  = inflags.GetValueInt("in_w");
        wei_spatial_lens[0] = inflags.GetValueInt("fil_d");
        wei_spatial_lens[1] = inflags.GetValueInt("fil_h");
        wei_spatial_lens[2] = inflags.GetValueInt("fil_w");
        pads[0]             = inflags.GetValueInt("pad_d");
        pads[1]             = inflags.GetValueInt("pad_h");
        pads[2]             = inflags.GetValueInt("pad_w");
        strides[0]          = inflags.GetValueInt("conv_stride_d");
        strides[1]          = inflags.GetValueInt("conv_stride_h");
        strides[2]          = inflags.GetValueInt("conv_stride_w");
        dilations[0]        = inflags.GetValueInt("dilation_d");
        dilations[1]        = inflags.GetValueInt("dilation_h");
        dilations[2]        = inflags.GetValueInt("dilation_w");
    }

    int out_c       = inflags.GetValueInt("out_channels");
    int in_c        = inflags.GetValueInt("in_channels");
    int group_count = std::max(inflags.GetValueInt("group_count"), 1);

    if(group_count > 1)
    {
        if(in_c % group_count != 0 || out_c % group_count != 0 || group_count > in_c ||
           group_count > out_c)
        {
            MIOPEN_THROW(miopenStatusBadParm, "Invalid group number");
        }
    }

    mode = miopenConvolution;

    if(mode == miopenConvolution &&
       (miopen::all_of(dilations, [](auto v) { return v == 1; }) ||
        miopen::all_of(wei_spatial_lens, [](auto v) { return v == 1; })))
    {
        if((inflags.GetValueStr("pad_mode")) == "same")
        {
            for(int i = 0; i < spatial_dim; ++i)
            {
                pads[i] =
                    (in_spatial_lens[i] % strides[i] == 0)
                        ? (std::max((wei_spatial_lens[i] - strides[i]), 0))
                        : (std::max((wei_spatial_lens[i] - (in_spatial_lens[i] % strides[i])), 0));
                pads[i] /= 2;
            }
        }
        else if((inflags.GetValueStr("pad_mode")) == "valid")
        {
            for(int i = 0; i < spatial_dim; ++i)
            {
                pads[i] = 0;
            }
        }
    }

    miopenInitConvolutionNdDescriptor(
        convDesc, spatial_dim, pads.data(), strides.data(), dilations.data(), mode);

    miopenSetConvolutionGroupCount(convDesc, group_count);

    return miopenStatusSuccess;
}

template <typename Tgpu, typename Tref>
std::vector<int> CBAInferFusionDriver<Tgpu, Tref>::GetOutputTensorLengths()
{
    int ndim = miopen::deref(inputTensor).GetNumDims();

    std::vector<int> out_lens(ndim);

    miopenGetConvolutionNdForwardOutputDim(
        convDesc, inputTensor, weightTensor, &ndim, out_lens.data());

    return out_lens;
}

template <typename Tgpu, typename Tref>
int CBAInferFusionDriver<Tgpu, Tref>::createSaveBuffers()
{

    status_t status = STATUS_SUCCESS;

    if(status != STATUS_SUCCESS)
        printf("Error copying data to GPU\n");

    return miopenStatusSuccess;
}

template <typename Tgpu, typename Tref>
int CBAInferFusionDriver<Tgpu, Tref>::createRunningBuffers()
{

    status_t status = STATUS_SUCCESS;
    DEFINE_CONTEXT(ctx);

    if(useBatchNorm)
    {
        size_t sb_sz = GetTensorSize(biasScaleTensor);

        // GPU allocation
        runningMean_dev     = std::make_unique<GPUMem>(ctx, sb_sz, sizeof(float));
        runningVariance_dev = std::make_unique<GPUMem>(ctx, sb_sz, sizeof(float));

        // GPU host allocation
        runningMean     = std::vector<float>(sb_sz, 0.0f);
        runningVariance = std::vector<float>(sb_sz, 0.0f);

        // Populate
        for(int i = 0; i < sb_sz; i++)
        {
#if(CBA_DEBUG_VALUES == 1)
            runningMean[i]     = 0.;
            runningVariance[i] = 1.;
#else
            runningMean[i]     = prng::gen_canonical<float>();
            runningVariance[i] = prng::gen_canonical<float>();
#endif
        }

        // GPU data transfer
        status |= runningMean_dev->ToGPU(q, runningMean.data());
        status |= runningVariance_dev->ToGPU(q, runningVariance.data());
        if(status != STATUS_SUCCESS)
        {
            MIOPEN_THROW(miopenStatusInternalError, "Error copying data to GPU");
        }
    }
    else
    {
        runningMean_dev     = nullptr;
        runningVariance_dev = nullptr;
    }
    return miopenStatusSuccess;
}

template <typename Tgpu, typename Tref>
int CBAInferFusionDriver<Tgpu, Tref>::AllocateBuffersAndCopy()
{

    status_t status = STATUS_SUCCESS;
    DEFINE_CONTEXT(ctx);

    size_t in_sz  = GetTensorSize(inputTensor);
    size_t wei_sz = GetTensorSize(weightTensor);
    size_t sb_sz  = 0;
    if(useBatchNorm)
    {
        miopenDeriveBNTensorDescriptor(biasScaleTensor, inputTensor, bn_mode);
        sb_sz = GetTensorSize(biasScaleTensor);
    }

    size_t out_sz = 0;
    if(fusion_mode != miopen_fusion_na)
        out_sz = GetTensorSize(outputTensor);
    else
        out_sz = in_sz; // This is for N+A so the output is the same as the input size

    if(env::enabled(MIOPEN_DRIVER_PAD_BUFFERS_2M))
    {
        PadBufferSize(wei_sz, sizeof(Tgpu));
    }

    const Tgpu Data_scale = static_cast<Tgpu>(0.01);

    if(bias_mode)
    {
        size_t b_sz = GetTensorSize(biasTensor);
        b_dev       = std::make_unique<GPUMem>(ctx, b_sz, sizeof(Tgpu));
        b           = std::vector<Tgpu>(b_sz, static_cast<Tgpu>(0));
        bias_host   = std::vector<Tref>(b_sz, static_cast<Tref>(0));
        for(int i = 0; i < b_sz; i++)
        {
            b[i]         = prng::gen_canonical<Tgpu>();
            bias_host[i] = static_cast<Tref>(b[i]);
        }
        status |= b_dev->ToGPU(q, b.data());
    }

    // GPU allocation
    in_dev       = std::make_unique<GPUMem>(ctx, in_sz, sizeof(Tgpu));
    conv_res_dev = std::make_unique<GPUMem>(ctx, out_sz, sizeof(Tgpu));
    wei_dev      = std::make_unique<GPUMem>(ctx, wei_sz, sizeof(Tgpu));
    out_dev      = std::make_unique<GPUMem>(ctx, out_sz, sizeof(Tgpu));

    if(useBatchNorm)
    {
        scale       = std::vector<float>(sb_sz, 0.0f);
        bias        = std::vector<float>(sb_sz, 0.0f);
        bn_res      = std::vector<Tgpu>(out_sz, static_cast<Tgpu>(0));
        bn_res_host = std::vector<Tref>(out_sz, static_cast<Tref>(0));

        bn_res_dev = std::make_unique<GPUMem>(ctx, out_sz, sizeof(Tgpu));
        scale_dev  = std::make_unique<GPUMem>(ctx, sb_sz, sizeof(float));
        bias_dev   = std::make_unique<GPUMem>(ctx, sb_sz, sizeof(float));
        // Using random beta and gamma
        for(int i = 0; i < sb_sz; i++)
        {
#if(CBA_DEBUG_VALUES == 1)
            scale[i] = 1.; // prng::gen_canonical<float>(); // 1.0;
            bias[i]  = 10.;
#else
            scale[i] = prng::gen_canonical<float>();
            bias[i]  = prng::gen_canonical<float>();
#endif
        }
        status |= scale_dev->ToGPU(q, scale.data());
        status |= bias_dev->ToGPU(q, bias.data());
    }

    // GPU host allocation
    in       = std::vector<Tgpu>(in_sz, static_cast<Tgpu>(0));
    out      = std::vector<Tgpu>(out_sz, static_cast<Tgpu>(0));
    conv_res = std::vector<Tgpu>(out_sz, static_cast<Tgpu>(0));

    // CPU allocation
    in_host       = std::vector<Tref>(in_sz, static_cast<Tref>(0));
    wei_host      = std::vector<Tref>(wei_sz, static_cast<Tref>(0));
    conv_res_host = std::vector<Tref>(out_sz, static_cast<Tref>(0));
    out_host      = std::vector<Tref>(out_sz, static_cast<Tref>(0));

    // Data initialization
    for(int i = 0; i < in_sz; i++)
    {
#if(CBA_DEBUG_VALUES == 1)
        auto rval  = 1.; // prng::gen_canonical<Tgpu>(); // 1.0;
        in_host[i] = static_cast<double>(rval);
        in[i]      = rval;
#else
        auto rval  = prng::gen_0_to_B(Data_scale);
        in_host[i] = static_cast<double>(rval);
        in[i]      = rval;
#endif
    }

    if(fusion_mode != miopen_fusion_na)
    {
        wei = std::vector<Tgpu>(wei_sz, static_cast<Tgpu>(0));
        for(int i = 0; i < wei_sz; i++)
        {
#if(CBA_DEBUG_VALUES == 1)
            auto rval   = 1.; // prng::gen_canonical<Tgpu>(); // 1.;
            wei[i]      = static_cast<double>(rval);
            wei_host[i] = rval;
#else
            auto rval   = Data_scale * conv::RanGenWeights<Tgpu>();
            wei_host[i] = static_cast<double>(rval);
            wei[i]      = rval;
#endif
        }
        status |= wei_dev->ToGPU(q, wei.data());
    }

    status |= in_dev->ToGPU(q, in.data());
    status |= createRunningBuffers();

    if(status != STATUS_SUCCESS)
        printf("Fatal: Error copying data to GPU\nExiting...\n\n");

    return miopenStatusSuccess;
}

template <typename Tgpu, typename Tref>
void CBAInferFusionDriver<Tgpu, Tref>::runGPUBatchNormActivInference()
{

    miopenError = miopenStatusSuccess;
    double activ_alpha, activ_beta, activ_gamma;
    miopenActivationMode_t activ_mode;
    miopenGetActivationDescriptor(activDesc, &activ_mode, &activ_alpha, &activ_beta, &activ_gamma);

    double epsilon = static_cast<double>(EPSILON);
    float alpha = static_cast<float>(1), beta = static_cast<float>(0);

    miopenCreateOpBatchNormInference(fusePlanDesc, &bNormOp, bn_mode, biasScaleTensor);

    miopenCreateOpActivationForward(fusePlanDesc, &activOp, activ_mode);
    miopenSetOpArgsBatchNormInference(fusionArgs,
                                      bNormOp,
                                      &alpha,
                                      &beta,
                                      scale_dev->GetMem(),
                                      bias_dev->GetMem(),
                                      runningMean_dev->GetMem(),
                                      runningVariance_dev->GetMem(),
                                      epsilon);

    miopenSetOpArgsActivForward(
        fusionArgs, activOp, &alpha, &beta, activ_alpha, activ_beta, activ_gamma);

    miopenError = miopenCompileFusionPlan(GetHandle(), fusePlanDesc);
    if(miopenError != miopenStatusSuccess)
    {
        MIOPEN_THROW(miopenStatusNotImplemented, "BatchNormActivInference plan not supported");
    }

    size_t workspace_size = 0;
    miopenFusionPlanGetWorkSpaceSize(
        GetHandle(), fusePlanDesc, &workspace_size, miopenConvolutionFwdAlgoImplicitGEMM);

    if(workspace_size > 0)
    {
        DEFINE_CONTEXT(ctx);
        workspace_fwd_dev = std::make_unique<GPUMem>(ctx, workspace_size, sizeof(Tgpu));
    }

    for(int it = 0; it < iters; it++)
    {
        startTiming();
        miopenExecuteFusionPlan_v2(GetHandle(),
                                   fusePlanDesc,
                                   inputTensor,
                                   in_dev->GetMem(),
                                   outputTensor,
                                   out_dev->GetMem(),
                                   fusionArgs,
                                   (workspace_fwd_dev) ? workspace_fwd_dev->GetMem() : nullptr,
                                   workspace_size);
        finishTiming(it);
    }
}

template <typename Tgpu, typename Tref>
void CBAInferFusionDriver<Tgpu, Tref>::runGPUConvBatchNormActivInference()
{
    miopenError = miopenStatusSuccess;
    double activ_alpha, activ_beta, activ_gamma;
    miopenActivationMode_t activ_mode;
    miopenGetActivationDescriptor(activDesc, &activ_mode, &activ_alpha, &activ_beta, &activ_gamma);

    double epsilon = static_cast<double>(EPSILON);
    float alpha = static_cast<float>(1), beta = static_cast<float>(0);

    std::vector<int> pads(spatial_dim);
    std::vector<int> strides(spatial_dim);
    std::vector<int> dilations(spatial_dim);
    miopenConvolutionMode_t mode;

    miopenGetConvolutionNdDescriptor(
        convDesc, spatial_dim, &spatial_dim, pads.data(), strides.data(), dilations.data(), &mode);
    std::string plan_error_str;

    miopenCreateOpConvForward(fusePlanDesc, &convoOp, convDesc, weightTensor);
    plan_error_str += "Convolution";

    if(bias_mode)
    {
        miopenCreateOpBiasForward(fusePlanDesc, &biasOp, biasTensor);
        plan_error_str += "+Bias";
    }

    if(fusion_mode != miopen_fusion_cba)
    {
        miopenCreateOpBatchNormInference(fusePlanDesc, &bNormOp, bn_mode, biasScaleTensor);
        plan_error_str += "+BatchNorm";
    }

    if(fusion_mode != miopen_fusion_cn)
    {
        miopenCreateOpActivationForward(fusePlanDesc, &activOp, activ_mode);
        plan_error_str += "+Activation";
    }

    miopenSetOpArgsConvForward(fusionArgs, convoOp, &alpha, &beta, wei_dev->GetMem());

    if(bias_mode)
    {
        miopenSetOpArgsBiasForward(fusionArgs, biasOp, &alpha, &beta, b_dev->GetMem());
    }

    if(fusion_mode != miopen_fusion_cn)
    {
        miopenSetOpArgsActivForward(
            fusionArgs, activOp, &alpha, &beta, activ_alpha, activ_beta, activ_gamma);
    }

    if(fusion_mode != miopen_fusion_cba)
        miopenSetOpArgsBatchNormInference(fusionArgs,
                                          bNormOp,
                                          &alpha,
                                          &beta,
                                          scale_dev->GetMem(),
                                          bias_dev->GetMem(),
                                          runningMean_dev->GetMem(),
                                          runningVariance_dev->GetMem(),
                                          epsilon);
    miopenError = miopenCompileFusionPlan(GetHandle(), fusePlanDesc);
    if(miopenError != miopenStatusSuccess)
    {
        MIOPEN_THROW(miopenStatusNotImplemented, plan_error_str + " plan not supported");
    }

    size_t workspace_size = 0;
    miopenFusionPlanGetWorkSpaceSize(
        GetHandle(), fusePlanDesc, &workspace_size, miopenConvolutionFwdAlgoImplicitGEMM);

    if(workspace_size > 0)
    {
        DEFINE_CONTEXT(ctx);
        workspace_fwd_dev = std::make_unique<GPUMem>(ctx, workspace_size, sizeof(Tgpu));
    }

    for(int it = 0; it < iters; it++)
    {
        startTiming();
        miopenExecuteFusionPlan_v2(GetHandle(),
                                   fusePlanDesc,
                                   inputTensor,
                                   in_dev->GetMem(),
                                   outputTensor,
                                   out_dev->GetMem(),
                                   fusionArgs,
                                   (workspace_fwd_dev) ? workspace_fwd_dev->GetMem() : nullptr,
                                   workspace_size);
        finishTiming(it);
    }
}

template <typename Tgpu, typename Tref>
void CBAInferFusionDriver<Tgpu, Tref>::runGPUConvActivInference()
{
    // TODO: 3d
    miopenError = miopenStatusSuccess;
    double activ_alpha, activ_beta, activ_gamma;
    miopenActivationMode_t activ_mode;
    miopenGetActivationDescriptor(activDesc, &activ_mode, &activ_alpha, &activ_beta, &activ_gamma);
    float alpha = static_cast<float>(1), beta = static_cast<float>(0);

    miopenCreateOpConvForward(fusePlanDesc, &convoOp, convDesc, weightTensor);

    if(bias_mode)
    {
        miopenCreateOpBiasForward(fusePlanDesc, &biasOp, biasTensor);
    }

    miopenCreateOpActivationForward(fusePlanDesc, &activOp, activ_mode);

    miopenSetOpArgsConvForward(fusionArgs, convoOp, &alpha, &beta, wei_dev->GetMem());

    miopenSetOpArgsActivForward(
        fusionArgs, activOp, &alpha, &beta, activ_alpha, activ_beta, activ_gamma);

    if(bias_mode)
    {
        miopenSetOpArgsBiasForward(fusionArgs, biasOp, &alpha, &beta, b_dev->GetMem());
    }

    miopenError = miopenCompileFusionPlan(GetHandle(), fusePlanDesc);
    if(miopenError != miopenStatusSuccess)
    {
        MIOPEN_THROW(miopenStatusNotImplemented,
                     bias_mode ? "ConvBiasActivInference plan not supported"
                               : "ConvActivInference plan not supported");
    }

    size_t workspace_size = 0;
    miopenFusionPlanGetWorkSpaceSize(
        GetHandle(), fusePlanDesc, &workspace_size, miopenConvolutionFwdAlgoImplicitGEMM);

    if(workspace_size > 0)
    {
        DEFINE_CONTEXT(ctx);
        workspace_fwd_dev = std::make_unique<GPUMem>(ctx, workspace_size, sizeof(Tgpu));
    }

    for(int it = 0; it < iters; it++)
    {
        startTiming();
        miopenExecuteFusionPlan_v2(GetHandle(),
                                   fusePlanDesc,
                                   inputTensor,
                                   in_dev->GetMem(),
                                   outputTensor,
                                   out_dev->GetMem(),
                                   fusionArgs,
                                   (workspace_fwd_dev) ? workspace_fwd_dev->GetMem() : nullptr,
                                   workspace_size);
        finishTiming(it);
    }
}

template <typename Tgpu, typename Tref>
void CBAInferFusionDriver<Tgpu, Tref>::runGPUBNFwdInference()
{
    double epsilon = static_cast<double>(EPSILON);
    float alpha = static_cast<float>(1), beta = static_cast<float>(0);

    miopenBatchNormalizationForwardInference(GetHandle(),
                                             bn_mode,
                                             &alpha,
                                             &beta,
                                             outputTensor,
                                             conv_res_dev->GetMem(),
                                             outputTensor,
                                             bn_res_dev->GetMem(),
                                             biasScaleTensor,
                                             scale_dev->GetMem(),
                                             bias_dev->GetMem(),
                                             runningMean_dev->GetMem(),
                                             runningVariance_dev->GetMem(),
                                             epsilon);

    // bn_res_dev->FromGPU(GetStream(), bn_res.data());

    return;
}

template <typename Tgpu, typename Tref>
void CBAInferFusionDriver<Tgpu, Tref>::runCPUActivFwdInference()
{
    double activ_alpha, activ_beta, activ_gamma;
    miopenActivationMode_t activ_mode;
    miopenGetActivationDescriptor(activDesc, &activ_mode, &activ_alpha, &activ_beta, &activ_gamma);
    miopenActivationFwdHost<Tgpu, Tref>(activ_mode,
                                        activ_gamma,
                                        activ_beta,
                                        activ_alpha,
                                        out.size(),
                                        (!useBatchNorm) ? conv_res_host.data() : bn_res_host.data(),
                                        out_host.data());

    return;
}

template <typename Tgpu, typename Tref>
void CBAInferFusionDriver<Tgpu, Tref>::runGPUActivFwdInference()
{
    float alpha = static_cast<float>(1), beta = static_cast<float>(0);

    miopenActivationForward(GetHandle(),
                            activDesc,
                            &alpha,
                            outputTensor,
                            bn_res_dev->GetMem(), // DLOWELL this might be a bug if not using BN
                            &beta,
                            outputTensor,
                            out_dev->GetMem());

    return;
}

template <typename Tgpu, typename Tref>
void CBAInferFusionDriver<Tgpu, Tref>::runGPUConvBiasInference()
{

    float alpha = static_cast<float>(1), beta = static_cast<float>(0);

    if(bias_mode)
    {
        miopenConvolutionForwardBias(GetHandle(),
                                     &alpha,
                                     biasTensor,
                                     b_dev->GetMem(),
                                     &beta,
                                     outputTensor,
                                     conv_res_dev->GetMem());
    }
}

template <typename Tgpu, typename Tref>
void CBAInferFusionDriver<Tgpu, Tref>::runGPUFusedConvBiasInference()
{

    miopenError = miopenStatusSuccess;
    float alpha = static_cast<float>(1), beta = static_cast<float>(0);
    int stride_h, stride_w, pad_h, pad_w, dilation_h, dilation_w;
    miopenConvolutionMode_t mode;
    miopenGetConvolutionDescriptor(
        convDesc, &mode, &pad_h, &pad_w, &stride_h, &stride_w, &dilation_h, &dilation_w);
    miopenCreateOpConvForward(fusePlanDesc, &convoOp, convDesc, weightTensor);
    miopenCreateOpBiasForward(fusePlanDesc, &biasOp, biasTensor);
    miopenSetOpArgsConvForward(fusionArgs, convoOp, &alpha, &beta, wei_dev->GetMem());
    miopenSetOpArgsBiasForward(fusionArgs, biasOp, &alpha, &beta, b_dev->GetMem());
    miopenError = miopenCompileFusionPlan(GetHandle(), fusePlanDesc);
    if(miopenError != miopenStatusSuccess)
    {
        std::cerr << "ConvBiasInference plan not supported." << std::endl;
    }

    size_t workspace_size = 0;
    miopenFusionPlanGetWorkSpaceSize(
        GetHandle(), fusePlanDesc, &workspace_size, miopenConvolutionFwdAlgoImplicitGEMM);

    if(workspace_size > 0)
    {
        DEFINE_CONTEXT(ctx);
        workspace_fwd_dev = std::make_unique<GPUMem>(ctx, workspace_size, sizeof(Tgpu));
    }

    for(int it = 0; it < iters; it++)
    {
        startTiming();
        miopenExecuteFusionPlan_v2(GetHandle(),
                                   fusePlanDesc,
                                   inputTensor,
                                   in_dev->GetMem(),
                                   outputTensor,
                                   out_dev->GetMem(),
                                   fusionArgs,
                                   (workspace_fwd_dev) ? workspace_fwd_dev->GetMem() : nullptr,
                                   workspace_size);
        finishTiming(it);
    }
}

template <typename Tgpu, typename Tref>
int CBAInferFusionDriver<Tgpu, Tref>::RunForwardGPU()
{
    //"Fusion mode (cbna = 0, cna = 1, na = 2, cn = 3, cba = 4, ca = 5, cb = 6) (Default=cbna)"
    assert(fusion_mode < 7 && fusion_mode >= 0);
    iters = inflags.GetValueInt("iter");
    std::cout << "Running fusion: ";
    switch(fusion_mode)
    {
    case 0: std::cout << "Convolution+Bias+BatchNorm+Activation" << std::endl; break;
    case 1: std::cout << "Convolution+BatchNorm+Activation" << std::endl; break;
    case 2: std::cout << "BatchNorm+Activation" << std::endl; break;
    case 3: std::cout << "Convolution+BatchNorm" << std::endl; break;
    case 4: std::cout << "Convolution+Bias+Activation" << std::endl; break;
    case 5: std::cout << "Convolution+Activation" << std::endl; break;
    case 6: std::cout << "Convolution+Bias" << std::endl; break;
    }
    initTiming();
    switch(fusion_mode)
    {
    case 0:
    case 1:
    case 3:
    case 4: runGPUConvBatchNormActivInference(); break;
    case 5: runGPUConvActivInference(); break;
    case 2: runGPUBatchNormActivInference(); break;
    case 6: runGPUFusedConvBiasInference(); break;
    }

    if(WALL_CLOCK)
    {
        printf("Wall-clock Time Elapsed: %f ms, for %d iterations.\n",
               (iters == 1) ? t.gettime_ms() : (fulltime / float(iters - 1)),
               (iters > 1) ? iters - 1 : 1);
    }

    if(inflags.GetValueStr("time") == "1")
    {
        printf("GPU Fused Kernel Min Time Elapsed: %f ms\n", lowtime);
        if(iters > 1)
            printf("GPU Fused Kernel Avg Time Elapsed: %f ms, for %d "
                   "iterations.\n",
                   avgtime / (iters - 1),
                   iters - 1);
    }

    out_dev->FromGPU(GetStream(), out.data());

    return miopenStatusSuccess;
}

template <typename Tgpu, typename Tref>
void CBAInferFusionDriver<Tgpu, Tref>::runCPUConvFwdInference()
{
    tensor<Tref> in_local_host;
    tensor<Tref> wei_local_host;
    tensor<Tref> outhost_local_host;

    in_local_host.desc      = miopen::deref(inputTensor);
    wei_local_host.desc     = miopen::deref(weightTensor);
    outhost_local_host.desc = miopen::deref(outputTensor);

    in_local_host.data  = in_host;
    wei_local_host.data = wei_host;
    outhost_local_host.data.resize(outhost_local_host.desc.GetElementSpace());
    cpu_convolution_forward(miopen::deref(convDesc).GetSpatialDimension(),
                            in_local_host,
                            wei_local_host,
                            outhost_local_host,
                            miopen::deref(convDesc).GetConvPads(),
                            miopen::deref(convDesc).GetConvStrides(),
                            miopen::deref(convDesc).GetConvDilations(),
                            miopen::deref(convDesc).GetGroupCount());

    if constexpr(!std::is_same_v<Tgpu, Tref>)
    {
        for(size_t i = 0; i < outhost_local_host.data.size(); ++i)
        {
            outhost_local_host.data[i] =
                static_cast<Tref>(static_cast<Tgpu>(outhost_local_host.data[i]));
        }
    }

    if(bias_mode)
    {
        tensor<Tref> bias_local_host(miopen::deref(biasTensor).GetLengths(),
                                     miopen::deref(biasTensor).GetStrides());
        bias_local_host.data = bias_host;
        cpu_bias_forward(outhost_local_host, bias_local_host);
    }

    if(fusion_mode != miopen_fusion_cb)
    {
        conv_res_host = outhost_local_host.data;
    }
    else
    {
        out_host = outhost_local_host.data;
    }

    return;
}

template <typename Tgpu, typename Tref>
void CBAInferFusionDriver<Tgpu, Tref>::runCPUBNFwdInference()
{
    double epsilon = static_cast<double>(EPSILON);

    if(bn_mode == miopenBNPerActivation)
    { // 1xCxHxW
        std::cout << "Running CPU per activation BN." << std::endl;
        miopenBNPerActivFwdInferHost(
            fusion_mode != miopen_fusion_na ? outputTensor
                                            : inputTensor, // DLOWELL use output for splice test
            fusion_mode != miopen_fusion_na
                ? conv_res_host.data()
                : in_host.data(), // conv_res_host.data(), //DLOWELL use conv for splice test
            bn_res_host.data(),
            scale.data(),
            bias.data(),
            epsilon,
            runningMean.data(),
            runningVariance.data());
    }
    else if(bn_mode == miopenBNSpatial)
    { // 1xCx1x1
        std::cout << "Running CPU spatial BN." << std::endl;
        miopenBNSpatialFwdInferHost(
            fusion_mode != miopen_fusion_na ? outputTensor
                                            : inputTensor, // DLOWELL use output for splice test
            fusion_mode != miopen_fusion_na
                ? conv_res_host.data()
                : in_host.data(), // conv_res_host.data(), //DLOWELL use conv for splice test
            bn_res_host.data(),
            scale.data(),
            bias.data(),
            epsilon,
            runningMean.data(),
            runningVariance.data());
    }
    else
    {
        MIOPEN_THROW(miopenStatusInternalError,
                     "Bad batch normalization mode in host kernel selection");
    }
    // C+N mode so we are done
    if(fusion_mode == miopen_fusion_cn)
        out_host = bn_res_host; // DLOWELL if we add C+B+N the is to be modified

    return;
}

template <typename Tgpu, typename Tref>
int CBAInferFusionDriver<Tgpu, Tref>::RunForwardCPU()
{
    //"Fusion mode (cbna = 0, cna = 1, na = 2, cn = 3, cba = 4, ca = 5, cb = 6) (Default=cbna)"
    MIOPEN_LOG_I("Fusion mode: " << fusion_mode);
    if(fusion_mode != miopen_fusion_na)
    {
        std::cout << "Running CPU fwd convolution and/or bias." << std::endl;
        runCPUConvFwdInference();
    }

    if(useBatchNorm)
    {
        std::cout << "Running CPU fwd batch normalization." << std::endl;
        runCPUBNFwdInference();
    }

    if(fusion_mode != miopen_fusion_cb && fusion_mode != miopen_fusion_cn)
    {
        std::cout << "Running CPU fwd activation." << std::endl;
        runCPUActivFwdInference();
    }

    if constexpr(!std::is_same_v<Tgpu, Tref>)
    {
        for(size_t i = 0; i < out_host.size(); ++i)
        {
            out_host[i] = static_cast<Tref>(static_cast<Tgpu>(out_host[i]));
        }
    }

    return miopenStatusSuccess;
}

template <typename Tgpu, typename Tref>
int CBAInferFusionDriver<Tgpu, Tref>::VerifyForward()
{
    RunForwardCPU();

    const auto error = miopen::rms_range(out_host, out);

    const double tolerance = std::numeric_limits<Tgpu>::epsilon() * 80;

    if(!std::isfinite(error) || error > tolerance)
    {
        std::cout << "Forward Activation FAILED: " << error << " > " << tolerance << std::endl;
        return EC_VerifyFwd;
    }

    std::cout << "Forward Activation Verifies on CPU and GPU (" << error << " < " << tolerance
              << ')' << std::endl;

    return miopenStatusSuccess;
}

#endif // GUARD_MIOPEN_BN_DRIVER_HPP