Function test_copy_tensor_gpu

dlib/test/dnn.cpp:2997–3046

    }
#ifdef DLIB_USE_CUDA
    void test_copy_tensor_gpu()
    {
        using namespace dlib::tt;
        print_spinner();
        resizable_tensor dest(10, 9, 7, 15);
        resizable_tensor src1(10, 3, 7, 15);
        resizable_tensor src2(10, 3, 7, 15);
        resizable_tensor src3(10, 9, 7, 15);
        tt::tensor_rand rnd;
        rnd.fill_gaussian(dest);
        rnd.fill_gaussian(src1);
        rnd.fill_gaussian(src2);
        rnd.fill_gaussian(src3);
        cuda::copy_tensor(false, dest, 0, src1, 0,  src1.k()); //full copy src1->dest
        cuda::copy_tensor(false, dest, src1.k(), src2, 0,  src2.k()); //full copy src2->dest with offset of src1
        cuda::copy_tensor(false, dest, src1.k() + src2.k(), src3, 3,  3); //partial copy src3 into the rest place of dest


        for (long i = 0; i < dest.num_samples(); ++i)
        {
            for (long k = 0; k < dest.k(); ++k)
            {
                for (long r = 0; r < dest.nr(); ++r)
                {
                    for (long c = 0; c < dest.nc(); ++c)
                    {
                        float dest_value = tensor_read_cpu(dest, i, k, r, c);
                        // first part is from src1
                        if (k < src1.k())
                        {
                            float src_value = tensor_read_cpu(src1, i, k, r, c);
                            DLIB_TEST(src_value == dest_value);
                        }
                            // second part is from src2
                        else if (k < src1.k() + src2.k())
                        {
                            float src_value = tensor_read_cpu(src2, i, k - src1.k(), r, c);
                            DLIB_TEST(src_value == dest_value);
                        }
                            // third part is from src3
                        else
                        {
                            float src_value = tensor_read_cpu(src3, i, k - src1.k() - src2.k() + 3, r, c);
                            DLIB_TEST(src_value == dest_value);
                        }
                    }
                }
            }
        }
    }
    void test_copy_tensor_add_to_gpu()
    {
        using namespace dlib::tt;