Merge pull request #184 from CNugteren/im_to_col

im2col

7 files changed, 432 insertions, 0 deletions

diff --git a/src/clblast.cpp b/src/clblast.cpp
index ca401066..9089b17c 100644
--- a/src/clblast.cpp
+++ b/src/clblast.cpp
@@ -72,6 +72,7 @@
 
 // Level-x includes (non-BLAS)
 #include "routines/levelx/xomatcopy.hpp"
+#include "routines/levelx/xim2col.hpp"
 #include "routines/levelx/xaxpybatched.hpp"
 #include "routines/levelx/xgemmbatched.hpp"
 
@@ -2212,6 +2213,42 @@ template StatusCode PUBLIC_API Omatcopy<half>(const Layout, const Transpose,
                                               cl_mem, const size_t, const size_t,
                                               cl_command_queue*, cl_event*);
 
+// Im2col function (non-BLAS function): SIM2COL/DIM2COL/CIM2COL/ZIM2COL/HIM2COL
+template <typename T>
+StatusCode Im2col(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 cl_mem im_buffer, const size_t im_offset,
+                  cl_mem col_buffer, const size_t col_offset,
+                  cl_command_queue* queue, cl_event* event) {
+  try {
+    auto queue_cpp = Queue(*queue);
+    auto routine = Xim2col<T>(queue_cpp, event);
+    routine.DoIm2col(channels, height, width, kernel_h, kernel_w, pad_h, pad_w, stride_h, stride_w, dilation_h, dilation_w,
+                     Buffer<T>(im_buffer), im_offset,
+                     Buffer<T>(col_buffer), col_offset);
+    return StatusCode::kSuccess;
+  } catch (...) { return DispatchException(); }
+}
+template StatusCode PUBLIC_API Im2col<float>(const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t,
+                                             const cl_mem, const size_t,
+                                             cl_mem, const size_t,
+                                             cl_command_queue*, cl_event*);
+template StatusCode PUBLIC_API Im2col<double>(const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t,
+                                              const cl_mem, const size_t,
+                                              cl_mem, const size_t,
+                                              cl_command_queue*, cl_event*);
+template StatusCode PUBLIC_API Im2col<float2>(const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t,
+                                              const cl_mem, const size_t,
+                                              cl_mem, const size_t,
+                                              cl_command_queue*, cl_event*);
+template StatusCode PUBLIC_API Im2col<double2>(const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t,
+                                               const cl_mem, const size_t,
+                                               cl_mem, const size_t,
+                                               cl_command_queue*, cl_event*);
+template StatusCode PUBLIC_API Im2col<half>(const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t, const size_t,
+                                            const cl_mem, const size_t,
+                                            cl_mem, const size_t,
+                                            cl_command_queue*, cl_event*);
+
 // Batched version of AXPY: SAXPYBATCHED/DAXPYBATCHED/CAXPYBATCHED/ZAXPYBATCHED/HAXPYBATCHED
 template <typename T>
 StatusCode AxpyBatched(const size_t n,
diff --git a/src/clblast_c.cpp b/src/clblast_c.cpp
index d2656274..24697779 100644
--- a/src/clblast_c.cpp
+++ b/src/clblast_c.cpp
@@ -3515,6 +3515,73 @@ CLBlastStatusCode CLBlastHomatcopy(const CLBlastLayout layout, const CLBlastTran
   } catch (...) { return static_cast<CLBlastStatusCode>(clblast::DispatchExceptionForC()); }
 }
 
+// IM2COL
+CLBlastStatusCode CLBlastSim2col(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 cl_mem im_buffer, const size_t im_offset,
+                                 cl_mem col_buffer, const size_t col_offset,
+                                 cl_command_queue* queue, cl_event* event) {
+  try {
+    return static_cast<CLBlastStatusCode>(
+      clblast::Im2col<float>(channels, height, width, kernel_h, kernel_w, pad_h, pad_w, stride_h, stride_w, dilation_h, dilation_w,
+                             im_buffer, im_offset,
+                             col_buffer, col_offset,
+                             queue, event)
+    );
+  } catch (...) { return static_cast<CLBlastStatusCode>(clblast::DispatchExceptionForC()); }
+}
+CLBlastStatusCode CLBlastDim2col(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 cl_mem im_buffer, const size_t im_offset,
+                                 cl_mem col_buffer, const size_t col_offset,
+                                 cl_command_queue* queue, cl_event* event) {
+  try {
+    return static_cast<CLBlastStatusCode>(
+      clblast::Im2col<double>(channels, height, width, kernel_h, kernel_w, pad_h, pad_w, stride_h, stride_w, dilation_h, dilation_w,
+                              im_buffer, im_offset,
+                              col_buffer, col_offset,
+                              queue, event)
+    );
+  } catch (...) { return static_cast<CLBlastStatusCode>(clblast::DispatchExceptionForC()); }
+}
+CLBlastStatusCode CLBlastCim2col(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 cl_mem im_buffer, const size_t im_offset,
+                                 cl_mem col_buffer, const size_t col_offset,
+                                 cl_command_queue* queue, cl_event* event) {
+  try {
+    return static_cast<CLBlastStatusCode>(
+      clblast::Im2col<float2>(channels, height, width, kernel_h, kernel_w, pad_h, pad_w, stride_h, stride_w, dilation_h, dilation_w,
+                              im_buffer, im_offset,
+                              col_buffer, col_offset,
+                              queue, event)
+    );
+  } catch (...) { return static_cast<CLBlastStatusCode>(clblast::DispatchExceptionForC()); }
+}
+CLBlastStatusCode CLBlastZim2col(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 cl_mem im_buffer, const size_t im_offset,
+                                 cl_mem col_buffer, const size_t col_offset,
+                                 cl_command_queue* queue, cl_event* event) {
+  try {
+    return static_cast<CLBlastStatusCode>(
+      clblast::Im2col<double2>(channels, height, width, kernel_h, kernel_w, pad_h, pad_w, stride_h, stride_w, dilation_h, dilation_w,
+                               im_buffer, im_offset,
+                               col_buffer, col_offset,
+                               queue, event)
+    );
+  } catch (...) { return static_cast<CLBlastStatusCode>(clblast::DispatchExceptionForC()); }
+}
+CLBlastStatusCode CLBlastHim2col(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 cl_mem im_buffer, const size_t im_offset,
+                                 cl_mem col_buffer, const size_t col_offset,
+                                 cl_command_queue* queue, cl_event* event) {
+  try {
+    return static_cast<CLBlastStatusCode>(
+      clblast::Im2col<half>(channels, height, width, kernel_h, kernel_w, pad_h, pad_w, stride_h, stride_w, dilation_h, dilation_w,
+                            im_buffer, im_offset,
+                            col_buffer, col_offset,
+                            queue, event)
+    );
+  } catch (...) { return static_cast<CLBlastStatusCode>(clblast::DispatchExceptionForC()); }
+}
+
 // AXPY
 CLBlastStatusCode CLBlastSaxpyBatched(const size_t n,
                                       const float *alphas,
diff --git a/src/clblast_netlib_c.cpp b/src/clblast_netlib_c.cpp
index d3b9b5e6..7859dddf 100644
--- a/src/clblast_netlib_c.cpp
+++ b/src/clblast_netlib_c.cpp
@@ -4735,4 +4735,94 @@ void cblas_zomatcopy(const CLBlastLayout layout, const CLBlastTranspose a_transp
   b_buffer.Read(queue, b_size, reinterpret_cast<double2*>(b));
 }
 
+// IM2COL
+void cblas_sim2col(const int channels, const int height, const int width, const int kernel_h, const int kernel_w, const int pad_h, const int pad_w, const int stride_h, const int stride_w, const int dilation_h, const int dilation_w,
+                   const float* im,
+                   float* col) {
+  auto device = get_device();
+  auto context = clblast::Context(device);
+  auto queue = clblast::Queue(context, device);
+  const auto im_size = height * width * channels;
+  const auto col_size = height * width * channels;
+  auto im_buffer = clblast::Buffer<float>(context, im_size);
+  auto col_buffer = clblast::Buffer<float>(context, col_size);
+  im_buffer.Write(queue, im_size, reinterpret_cast<const float*>(im));
+  col_buffer.Write(queue, col_size, reinterpret_cast<float*>(col));
+  auto queue_cl = queue();
+  auto s = clblast::Im2col<float>(channels, height, width, kernel_h, kernel_w, pad_h, pad_w, stride_h, stride_w, dilation_h, dilation_w,
+                                  im_buffer(), 0,
+                                  col_buffer(), 0,
+                                  &queue_cl);
+  if (s != clblast::StatusCode::kSuccess) {
+    throw std::runtime_error("CLBlast returned with error code " + clblast::ToString(s));
+  }
+  col_buffer.Read(queue, col_size, reinterpret_cast<float*>(col));
+}
+void cblas_dim2col(const int channels, const int height, const int width, const int kernel_h, const int kernel_w, const int pad_h, const int pad_w, const int stride_h, const int stride_w, const int dilation_h, const int dilation_w,
+                   const double* im,
+                   double* col) {
+  auto device = get_device();
+  auto context = clblast::Context(device);
+  auto queue = clblast::Queue(context, device);
+  const auto im_size = height * width * channels;
+  const auto col_size = height * width * channels;
+  auto im_buffer = clblast::Buffer<double>(context, im_size);
+  auto col_buffer = clblast::Buffer<double>(context, col_size);
+  im_buffer.Write(queue, im_size, reinterpret_cast<const double*>(im));
+  col_buffer.Write(queue, col_size, reinterpret_cast<double*>(col));
+  auto queue_cl = queue();
+  auto s = clblast::Im2col<double>(channels, height, width, kernel_h, kernel_w, pad_h, pad_w, stride_h, stride_w, dilation_h, dilation_w,
+                                   im_buffer(), 0,
+                                   col_buffer(), 0,
+                                   &queue_cl);
+  if (s != clblast::StatusCode::kSuccess) {
+    throw std::runtime_error("CLBlast returned with error code " + clblast::ToString(s));
+  }
+  col_buffer.Read(queue, col_size, reinterpret_cast<double*>(col));
+}
+void cblas_cim2col(const int channels, const int height, const int width, const int kernel_h, const int kernel_w, const int pad_h, const int pad_w, const int stride_h, const int stride_w, const int dilation_h, const int dilation_w,
+                   const void* im,
+                   void* col) {
+  auto device = get_device();
+  auto context = clblast::Context(device);
+  auto queue = clblast::Queue(context, device);
+  const auto im_size = height * width * channels;
+  const auto col_size = height * width * channels;
+  auto im_buffer = clblast::Buffer<float2>(context, im_size);
+  auto col_buffer = clblast::Buffer<float2>(context, col_size);
+  im_buffer.Write(queue, im_size, reinterpret_cast<const float2*>(im));
+  col_buffer.Write(queue, col_size, reinterpret_cast<float2*>(col));
+  auto queue_cl = queue();
+  auto s = clblast::Im2col<float2>(channels, height, width, kernel_h, kernel_w, pad_h, pad_w, stride_h, stride_w, dilation_h, dilation_w,
+                                   im_buffer(), 0,
+                                   col_buffer(), 0,
+                                   &queue_cl);
+  if (s != clblast::StatusCode::kSuccess) {
+    throw std::runtime_error("CLBlast returned with error code " + clblast::ToString(s));
+  }
+  col_buffer.Read(queue, col_size, reinterpret_cast<float2*>(col));
+}
+void cblas_zim2col(const int channels, const int height, const int width, const int kernel_h, const int kernel_w, const int pad_h, const int pad_w, const int stride_h, const int stride_w, const int dilation_h, const int dilation_w,
+                   const void* im,
+                   void* col) {
+  auto device = get_device();
+  auto context = clblast::Context(device);
+  auto queue = clblast::Queue(context, device);
+  const auto im_size = height * width * channels;
+  const auto col_size = height * width * channels;
+  auto im_buffer = clblast::Buffer<double2>(context, im_size);
+  auto col_buffer = clblast::Buffer<double2>(context, col_size);
+  im_buffer.Write(queue, im_size, reinterpret_cast<const double2*>(im));
+  col_buffer.Write(queue, col_size, reinterpret_cast<double2*>(col));
+  auto queue_cl = queue();
+  auto s = clblast::Im2col<double2>(channels, height, width, kernel_h, kernel_w, pad_h, pad_w, stride_h, stride_w, dilation_h, dilation_w,
+                                    im_buffer(), 0,
+                                    col_buffer(), 0,
+                                    &queue_cl);
+  if (s != clblast::StatusCode::kSuccess) {
+    throw std::runtime_error("CLBlast returned with error code " + clblast::ToString(s));
+  }
+  col_buffer.Read(queue, col_size, reinterpret_cast<double2*>(col));
+}
+
 // =================================================================================================
diff --git a/src/kernels/levelx/im2col.opencl b/src/kernels/levelx/im2col.opencl
new file mode 100644
index 00000000..a141db41
--- /dev/null
+++ b/src/kernels/levelx/im2col.opencl
@@ -0,0 +1,78 @@
+
+// =================================================================================================
+// 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 contains the im2col kernel.
+//
+// =================================================================================================
+
+// Enables loading of this file using the C++ pre-processor's #include (C++11 standard raw string
+// literal). Comment-out this line for syntax-highlighting when developing.
+R"(
+
+// Work-group size parameters re-used from the 'copy' kernel
+#ifndef COPY_DIMX
+  #define COPY_DIMX 8      // Local workgroup size in the first dimension (x)
+#endif
+#ifndef COPY_DIMY
+  #define COPY_DIMY 8      // Local workgroup size in the second dimension (y)
+#endif
+
+// =================================================================================================
+
+__kernel __attribute__((reqd_work_group_size(COPY_DIMX, COPY_DIMY, 1)))
+void im2col(const int input_h, const int input_w,
+            const int output_h, const int output_w,
+            const int kernel_h, const int kernel_w,
+            const int pad_h, const int pad_w,
+            const int stride_h, const int stride_w,
+            const int dilation_h, const int dilation_w,
+            const __global real* restrict im_buffer, const int im_offset,
+            __global real* col_buffer, const int col_offset) {
+
+  // Thread IDs
+  const int w_id = get_global_id(0); // image width, max 'output_w'
+  const int h_id = get_global_id(1); // image height, max 'output_h'
+  const int c_id = get_global_id(2); // input channels
+  if (h_id < output_h && w_id < output_w) {
+
+    #pragma unroll
+    for (int kh_id = 0; kh_id < kernel_h; ++kh_id) { // kernel height
+      #pragma unroll
+      for (int kw_id = 0; kw_id < kernel_w; ++kw_id) { // kernel width
+
+        // Retrieves the input value
+        const int h_index = -pad_h + kh_id * dilation_h + stride_h * h_id;
+        const int w_index = -pad_w + kw_id * dilation_w + stride_w * w_id;
+        real val;
+        if (h_index >= 0 && h_index < input_h &&
+            w_index >= 0 && w_index < input_w) {
+          const int input_index = w_index + input_w * (h_index + input_h * c_id);
+          val = im_buffer[input_index + im_offset];
+        }
+        else {
+          SetToZero(val);
+        }
+
+        // Sets the output value
+        const int kernel_index = kw_id + kernel_w * kh_id;
+        const int patch_index = w_id + output_w * h_id;
+        const int output_index = patch_index + kernel_index * output_w * output_h +
+                                  c_id * output_w * output_h * kernel_h * kernel_w;
+        col_buffer[output_index + col_offset] = val;
+      }
+    }
+  }
+}
+
+// =================================================================================================
+
+// End of the C++11 raw string literal
+)"
+
+// =================================================================================================
diff --git a/src/routines/levelx/xim2col.cpp b/src/routines/levelx/xim2col.cpp
new file mode 100644
index 00000000..51171eb5
--- /dev/null
+++ b/src/routines/levelx/xim2col.cpp
@@ -0,0 +1,91 @@
+
+// =================================================================================================
+// 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
diff --git a/src/routines/levelx/xim2col.hpp b/src/routines/levelx/xim2col.hpp
new file mode 100644
index 00000000..4448b54e
--- /dev/null
+++ b/src/routines/levelx/xim2col.hpp
@@ -0,0 +1,44 @@
+
+// =================================================================================================
+// 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 routine. The precision is implemented using a template argument.
+//
+// =================================================================================================
+
+#ifndef CLBLAST_ROUTINES_XIM2COL_H_
+#define CLBLAST_ROUTINES_XIM2COL_H_
+
+#include "routine.hpp"
+
+namespace clblast {
+// =================================================================================================
+
+// See comment at top of file for a description of the class
+template <typename T>
+class Xim2col: public Routine {
+ public:
+
+  // Constructor
+  Xim2col(Queue &queue, EventPointer event, const std::string &name = "IM2COL");
+
+  // Templated-precision implementation of the routine
+  void 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);
+};
+
+// =================================================================================================
+} // namespace clblast
+
+// CLBLAST_ROUTINES_XIM2COL_H_
+#endif
diff --git a/src/utilities/utilities.hpp b/src/utilities/utilities.hpp
index a9c492f3..fae69b63 100644
--- a/src/utilities/utilities.hpp
+++ b/src/utilities/utilities.hpp
@@ -77,6 +77,19 @@ constexpr auto kArgAlpha = "alpha";
 constexpr auto kArgBeta = "beta";
 constexpr auto kArgBatchCount = "batch_num";
 
+// Constants for im2col
+constexpr auto kArgChannels = "channels";
+constexpr auto kArgHeight = "height";
+constexpr auto kArgWidth = "width";
+constexpr auto kArgKernelH = "kernelh";
+constexpr auto kArgKernelW = "kernelw";
+constexpr auto kArgPadH = "padh";
+constexpr auto kArgPadW = "padw";
+constexpr auto kArgStrideH = "strideh";
+constexpr auto kArgStrideW = "stridew";
+constexpr auto kArgDilationH = "dilationh";
+constexpr auto kArgDilationW = "dilationw";
+
 // The tuner-specific arguments in string form
 constexpr auto kArgFraction = "fraction";
 constexpr auto kArgHeuristicSelection = "heuristic";
@@ -162,6 +175,18 @@ struct Arguments {
   size_t imax_offset = 0;
   T alpha = ConstantOne<T>();
   T beta = ConstantOne<T>();
+  // Arguments for im2col
+  size_t channels = 1;
+  size_t height = 1;
+  size_t width = 1;
+  size_t kernel_h = 3;
+  size_t kernel_w = 3;
+  size_t pad_h = 0;
+  size_t pad_w = 0;
+  size_t stride_h = 1;
+  size_t stride_w = 1;
+  size_t dilation_h = 1;
+  size_t dilation_w = 1;
   // Batch-specific arguments
   size_t batch_count = 1;
   std::vector<size_t> x_offsets; // = {0};