tensor_driver.hpp

/*******************************************************************************
 *
 * 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
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#ifndef GUARD_MIOPEN_TENSOR_DRIVER_HPP
#define GUARD_MIOPEN_TENSOR_DRIVER_HPP

#include <algorithm>
#include <miopen/miopen.h>
#include <miopen/tensor.hpp>
#include <miopen/tensor_extra.hpp>
#include <numeric>
#include <vector>

std::vector<int> GetTensorLengths(miopenTensorDescriptor_t& tensor)
{
    int n;
    int c;
    int h;
    int w;
    int d;

    int size = 0;
    miopenGetTensorDescriptorSize(tensor, &size);

    if(size == 5)
    {
        miopenGet5dTensorDescriptorLengths(tensor, &n, &c, &d, &h, &w);
        return std::vector<int>({n, c, d, h, w});
    }
    else if(size == 4)
    {
        miopenGet4dTensorDescriptorLengths(tensor, &n, &c, &h, &w);
        return std::vector<int>({n, c, h, w});
    }

    std::vector<int> tensor_len;
    tensor_len.resize(miopen::deref(tensor).GetSize());
    miopenGetTensorDescriptor(tensor, nullptr, tensor_len.data(), nullptr);

    return tensor_len;
}

std::vector<int> GetTensorStrides(miopenTensorDescriptor_t& tensor)
{
    int nstride;
    int cstride;
    int dstride;
    int hstride;
    int wstride;

    int size = 0;
    miopenGetTensorDescriptorSize(tensor, &size);

    if(size == 5)
    {
        miopenGet5dTensorDescriptorStrides(
            tensor, &nstride, &cstride, &dstride, &hstride, &wstride);
        return std::vector<int>({nstride, cstride, dstride, hstride, wstride});
    }
    else
    {
        miopenGet4dTensorDescriptorStrides(tensor, &nstride, &cstride, &hstride, &wstride);
        return std::vector<int>({nstride, cstride, hstride, wstride});
    }
}

int SetTensor4d(miopenTensorDescriptor_t t,
                std::vector<int>& len,
                miopenDataType_t data_type = miopenFloat)
{
    return miopenSet4dTensorDescriptor(t, data_type, UNPACK_VEC4(len));
}

int SetTensorNd(miopenTensorDescriptor_t t,
                std::vector<int>& len,
                miopenDataType_t data_type = miopenFloat)
{
    return miopenSetTensorDescriptor(t, data_type, len.size(), len.data(), nullptr);
}

size_t GetTensorSize(miopenTensorDescriptor_t& tensor)
{
    std::vector<int> len = GetTensorLengths(tensor);
    size_t sz            = std::accumulate(len.begin(), len.end(), 1, std::multiplies<int>());

    return sz;
}
#endif // GUARD_MIOPEN_TENSOR_DRIVER_HPP