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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
void RunKernel(Kernel &kernel, Queue &queue, const Device &device,
std::vector<size_t> global, const std::vector<size_t> &local,
EventPointer event, const std::vector<Event> &waitForEvents = {});
// =================================================================================================
// Sets all elements of a matrix to a constant value
template <typename T>
void FillMatrix(Queue &queue, const Device &device,
const Program &program, const Database &,
EventPointer event, const std::vector<Event> &waitForEvents,
const size_t n, const size_t ld, const size_t offset,
const Buffer<T> &dest,
const T constant_value) {
auto kernel = Kernel(program, "FillMatrix");
kernel.SetArgument(0, static_cast<int>(n));
kernel.SetArgument(1, static_cast<int>(ld));
kernel.SetArgument(2, static_cast<int>(offset));
kernel.SetArgument(3, dest());
kernel.SetArgument(4, GetRealArg(constant_value));
auto local = std::vector<size_t>{8, 8};
auto global = std::vector<size_t>{Ceil(ld, 8), Ceil(n, 8)};
RunKernel(kernel, queue, device, global, local, event, waitForEvents);
}
// =================================================================================================
// 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>
void PadCopyTransposeMatrix(Queue &queue, const Device &device,
const Database &db,
EventPointer event, const 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_DIM"]) &&
IsMultiple(src_two, db["TRA_WPT"]*db["TRA_DIM"])) {
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";
}
}
// Retrieves the kernel from the compiled binary
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, GetRealArg(alpha));
}
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, GetRealArg(alpha));
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"]};
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"]};
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"]};
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"]};
RunKernel(kernel, queue, device, global, local, event, waitForEvents);
}
}
}
// =================================================================================================
} // namespace clblast
// CLBLAST_ROUTINES_COMMON_H_
#endif
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