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// =================================================================================================
// This file is part of the CLBlast project. The project is licensed under Apache Version 2.0. This
// project loosely follows the Google C++ styleguide and uses a tab-size of two spaces and a max-
// width of 100 characters per line.
//
// Author(s):
// Cedric Nugteren <www.cedricnugteren.nl>
//
// This file implements the Xim2col class (see the header for information about the class).
//
// =================================================================================================
#include "routines/levelx/xim2col.hpp"
#include <string>
#include <vector>
namespace clblast {
// =================================================================================================
// Constructor: forwards to base class constructor
template <typename T>
Xim2col<T>::Xim2col(Queue &queue, EventPointer event, const std::string &name):
Routine(queue, event, name, {"Copy"}, PrecisionValue<T>(), {}, {
#include "../../kernels/levelx/im2col.opencl"
}) {
}
// =================================================================================================
// The main routine
template <typename T>
void Xim2col<T>::DoIm2col(const size_t channels, const size_t height, const size_t width,
const size_t kernel_h, const size_t kernel_w, const size_t pad_h,
const size_t pad_w, const size_t stride_h, const size_t stride_w,
const size_t dilation_h, const size_t dilation_w,
const Buffer<T> &im_buffer, const size_t im_offset,
const Buffer<T> &col_buffer, const size_t col_offset) {
// Makes sure all dimensions are larger than zero
if ((channels == 0) || (height == 0) || (width == 0)) { throw BLASError(StatusCode::kInvalidDimension); }
// Sets the output height and width
const auto size_h = height + 2 * pad_h;
const auto padding_h = dilation_h * (kernel_h - 1) + 1;
const auto output_h = (size_h >= padding_h) ? (size_h - padding_h) / stride_h + 1 : 1;
const auto size_w = width + 2 * pad_w;
const auto padding_w = dilation_w * (kernel_w - 1) + 1;
const auto output_w = (size_w >= padding_w) ? (size_w - padding_w) / stride_w + 1 : 1;
// Retrieves the Xcopy kernel from the compiled binary
auto kernel = Kernel(program_, "im2col");
// Sets the kernel arguments
kernel.SetArgument(0, static_cast<int>(height));
kernel.SetArgument(1, static_cast<int>(width));
kernel.SetArgument(2, static_cast<int>(output_h));
kernel.SetArgument(3, static_cast<int>(output_w));
kernel.SetArgument(4, static_cast<int>(kernel_h));
kernel.SetArgument(5, static_cast<int>(kernel_w));
kernel.SetArgument(6, static_cast<int>(pad_h));
kernel.SetArgument(7, static_cast<int>(pad_w));
kernel.SetArgument(8, static_cast<int>(stride_h));
kernel.SetArgument(9, static_cast<int>(stride_w));
kernel.SetArgument(10, static_cast<int>(dilation_h));
kernel.SetArgument(11, static_cast<int>(dilation_w));
kernel.SetArgument(12, im_buffer());
kernel.SetArgument(13, static_cast<int>(im_offset));
kernel.SetArgument(14, col_buffer());
kernel.SetArgument(15, static_cast<int>(col_offset));
// Launches the kernel
const auto w_ceiled = Ceil(output_w, db_["COPY_DIMY"]);
const auto h_ceiled = Ceil(output_h, db_["COPY_DIMX"]);
const auto global = std::vector<size_t>{w_ceiled, h_ceiled, channels};
const auto local = std::vector<size_t>{db_["COPY_DIMX"], db_["COPY_DIMY"], 1};
RunKernel(kernel, queue_, device_, global, local, event_);
}
// =================================================================================================
// Compiles the templated class
template class Xim2col<half>;
template class Xim2col<float>;
template class Xim2col<double>;
template class Xim2col<float2>;
template class Xim2col<double2>;
// =================================================================================================
} // namespace clblast
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