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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 contains all the interfaces to common kernels, such as copying, padding, and
+// transposing a matrix. These functions are templated and thus header-only. This file also contains
+// other common functions to routines, such as a function to launch a kernel.
+//
+// =================================================================================================
+
+#ifndef CLBLAST_ROUTINES_COMMON_H_
+#define CLBLAST_ROUTINES_COMMON_H_
+
+#include <string>
+#include <vector>
+
+#include "clblast.h"
+#include "clpp11.hpp"
+#include "database/database.hpp"
+
+namespace clblast {
+// =================================================================================================
+
+// Enqueues a kernel, waits for completion, and checks for errors
+StatusCode RunKernel(Kernel &kernel, Queue &queue, const Device &device,
+ std::vector<size_t> global, const std::vector<size_t> &local,
+ EventPointer event, std::vector<Event>& waitForEvents);
+
+// As above, but without an event waiting list
+StatusCode RunKernel(Kernel &kernel, Queue &queue, const Device &device,
+ std::vector<size_t> global, const std::vector<size_t> &local,
+ EventPointer event);
+
+// =================================================================================================
+
+// Copies or transposes a matrix and optionally pads/unpads it with zeros. This method is also able
+// to write to symmetric and triangular matrices through optional arguments.
+template <typename T>
+StatusCode PadCopyTransposeMatrix(Queue &queue, const Device &device, const Context &context,
+ const Database &db,
+ EventPointer event, std::vector<Event>& waitForEvents,
+ const size_t src_one, const size_t src_two,
+ const size_t src_ld, const size_t src_offset,
+ const Buffer<T> &src,
+ const size_t dest_one, const size_t dest_two,
+ const size_t dest_ld, const size_t dest_offset,
+ const Buffer<T> &dest,
+ const T alpha,
+ const Program &program, const bool do_pad,
+ const bool do_transpose, const bool do_conjugate,
+ const bool upper = false, const bool lower = false,
+ const bool diagonal_imag_zero = false) {
+
+ // Determines whether or not the fast-version could potentially be used
+ auto use_fast_kernel = (src_offset == 0) && (dest_offset == 0) && (do_conjugate == false) &&
+ (src_one == dest_one) && (src_two == dest_two) && (src_ld == dest_ld) &&
+ (upper == false) && (lower == false) && (diagonal_imag_zero == false);
+
+ // Determines the right kernel
+ auto kernel_name = std::string{};
+ if (do_transpose) {
+ if (use_fast_kernel &&
+ IsMultiple(src_ld, db["TRA_WPT"]) &&
+ IsMultiple(src_one, db["TRA_WPT"]*db["TRA_WPT"]) &&
+ IsMultiple(src_two, db["TRA_WPT"]*db["TRA_WPT"])) {
+ kernel_name = "TransposeMatrixFast";
+ }
+ else {
+ use_fast_kernel = false;
+ kernel_name = (do_pad) ? "TransposePadMatrix" : "TransposeMatrix";
+ }
+ }
+ else {
+ if (use_fast_kernel &&
+ IsMultiple(src_ld, db["COPY_VW"]) &&
+ IsMultiple(src_one, db["COPY_VW"]*db["COPY_DIMX"]) &&
+ IsMultiple(src_two, db["COPY_WPT"]*db["COPY_DIMY"])) {
+ kernel_name = "CopyMatrixFast";
+ }
+ else {
+ use_fast_kernel = false;
+ kernel_name = (do_pad) ? "CopyPadMatrix" : "CopyMatrix";
+ }
+ }
+
+ // Upload the scalar argument as a constant buffer to the device (needed for half-precision)
+ auto alpha_buffer = Buffer<T>(context, 1);
+ alpha_buffer.Write(queue, 1, &alpha);
+
+ // Retrieves the kernel from the compiled binary
+ try {
+ auto kernel = Kernel(program, kernel_name);
+
+ // Sets the kernel arguments
+ if (use_fast_kernel) {
+ kernel.SetArgument(0, static_cast<int>(src_ld));
+ kernel.SetArgument(1, src());
+ kernel.SetArgument(2, dest());
+ kernel.SetArgument(3, alpha_buffer());
+ }
+ else {
+ kernel.SetArgument(0, static_cast<int>(src_one));
+ kernel.SetArgument(1, static_cast<int>(src_two));
+ kernel.SetArgument(2, static_cast<int>(src_ld));
+ kernel.SetArgument(3, static_cast<int>(src_offset));
+ kernel.SetArgument(4, src());
+ kernel.SetArgument(5, static_cast<int>(dest_one));
+ kernel.SetArgument(6, static_cast<int>(dest_two));
+ kernel.SetArgument(7, static_cast<int>(dest_ld));
+ kernel.SetArgument(8, static_cast<int>(dest_offset));
+ kernel.SetArgument(9, dest());
+ kernel.SetArgument(10, alpha_buffer());
+ if (do_pad) {
+ kernel.SetArgument(11, static_cast<int>(do_conjugate));
+ }
+ else {
+ kernel.SetArgument(11, static_cast<int>(upper));
+ kernel.SetArgument(12, static_cast<int>(lower));
+ kernel.SetArgument(13, static_cast<int>(diagonal_imag_zero));
+ }
+ }
+
+ // Launches the kernel and returns the error code. Uses global and local thread sizes based on
+ // parameters in the database.
+ if (do_transpose) {
+ if (use_fast_kernel) {
+ const auto global = std::vector<size_t>{
+ dest_one / db["TRA_WPT"],
+ dest_two / db["TRA_WPT"]
+ };
+ const auto local = std::vector<size_t>{db["TRA_DIM"], db["TRA_DIM"]};
+ return RunKernel(kernel, queue, device, global, local, event, waitForEvents);
+ }
+ else {
+ const auto global = std::vector<size_t>{
+ Ceil(CeilDiv(dest_one, db["PADTRA_WPT"]), db["PADTRA_TILE"]),
+ Ceil(CeilDiv(dest_two, db["PADTRA_WPT"]), db["PADTRA_TILE"])
+ };
+ const auto local = std::vector<size_t>{db["PADTRA_TILE"], db["PADTRA_TILE"]};
+ return RunKernel(kernel, queue, device, global, local, event, waitForEvents);
+ }
+ }
+ else {
+ if (use_fast_kernel) {
+ const auto global = std::vector<size_t>{
+ dest_one / db["COPY_VW"],
+ dest_two / db["COPY_WPT"]
+ };
+ const auto local = std::vector<size_t>{db["COPY_DIMX"], db["COPY_DIMY"]};
+ return RunKernel(kernel, queue, device, global, local, event, waitForEvents);
+ }
+ else {
+ const auto global = std::vector<size_t>{
+ Ceil(CeilDiv(dest_one, db["PAD_WPTX"]), db["PAD_DIMX"]),
+ Ceil(CeilDiv(dest_two, db["PAD_WPTY"]), db["PAD_DIMY"])
+ };
+ const auto local = std::vector<size_t>{db["PAD_DIMX"], db["PAD_DIMY"]};
+ return RunKernel(kernel, queue, device, global, local, event, waitForEvents);
+ }
+ }
+ } catch (...) { return StatusCode::kInvalidKernel; }
+}
+
+// =================================================================================================
+} // namespace clblast
+
+// CLBLAST_ROUTINES_COMMON_H_
+#endif