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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 Xgemv class (see the header for information about the class).
//
// =================================================================================================
#include "internal/routines/xgemv.h"
#include <string>
#include <vector>
namespace clblast {
// =================================================================================================
// Specific implementations to get the memory-type based on a template argument
template <> const Precision Xgemv<float>::precision_ = Precision::kSingle;
template <> const Precision Xgemv<double>::precision_ = Precision::kDouble;
template <> const Precision Xgemv<float2>::precision_ = Precision::kComplexSingle;
template <> const Precision Xgemv<double2>::precision_ = Precision::kComplexDouble;
// =================================================================================================
// Constructor: forwards to base class constructor
template <typename T>
Xgemv<T>::Xgemv(CommandQueue &queue, Event &event):
Routine(queue, event, {"Xgemv"}, precision_) {
}
// =================================================================================================
// The main routine
template <typename T>
StatusCode Xgemv<T>::DoGemv(const Layout layout, const Transpose a_transpose,
const size_t m, const size_t n,
const T alpha,
const Buffer &a_buffer, const size_t a_offset, const size_t a_ld,
const Buffer &x_buffer, const size_t x_offset, const size_t x_inc,
const T beta,
const Buffer &y_buffer, const size_t y_offset, const size_t y_inc) {
// Makes sure all dimensions are larger than zero
if (m == 0 || n == 0) { return StatusCode::kInvalidDimension; }
// Computes whether or not the matrix has an alternative layout (row or column-major).
auto a_altlayout = (layout == Layout::kRowMajor);
auto a_one = (a_altlayout) ? n : m;
auto a_two = (a_altlayout) ? m : n;
// Swap m and n if the matrix is transposed
auto a_transposed = (a_transpose == Transpose::kYes);
auto m_real = (a_transposed) ? n : m;
auto n_real = (a_transposed) ? m : n;
// Determines whether the kernel needs to perform rotated access ('^' is the XOR operator)
auto a_rotated = a_transposed ^ a_altlayout;
// Tests the matrix and the vectors for validity
auto status = TestMatrixA(a_one, a_two, a_buffer, a_offset, a_ld, sizeof(T));
if (ErrorIn(status)) { return status; }
status = TestVectorX(n_real, x_buffer, x_offset, x_inc, sizeof(T));
if (ErrorIn(status)) { return status; }
status = TestVectorY(m_real, y_buffer, y_offset, y_inc, sizeof(T));
if (ErrorIn(status)) { return status; }
// Retrieves the Xgemv kernel from the compiled binary
try {
auto program = GetProgramFromCache();
auto kernel = Kernel(program, "Xgemv");
// Sets the kernel arguments
kernel.SetArgument(0, static_cast<int>(m_real));
kernel.SetArgument(1, static_cast<int>(n_real));
kernel.SetArgument(2, alpha);
kernel.SetArgument(3, beta);
kernel.SetArgument(4, static_cast<int>(a_rotated));
kernel.SetArgument(5, a_buffer());
kernel.SetArgument(6, static_cast<int>(a_offset));
kernel.SetArgument(7, static_cast<int>(a_ld));
kernel.SetArgument(8, x_buffer());
kernel.SetArgument(9, static_cast<int>(x_offset));
kernel.SetArgument(10, static_cast<int>(x_inc));
kernel.SetArgument(11, y_buffer());
kernel.SetArgument(12, static_cast<int>(y_offset));
kernel.SetArgument(13, static_cast<int>(y_inc));
// Launches the kernel
auto m_ceiled = Ceil(m_real, db_["WGS"]);
auto global = std::vector<size_t>{CeilDiv(m_ceiled, db_["WPT"])};
auto local = std::vector<size_t>{db_["WGS"]};
status = RunKernel(kernel, global, local);
if (ErrorIn(status)) { return status; }
// Waits for all kernels to finish
queue_.Finish();
// Succesfully finished the computation
return StatusCode::kSuccess;
} catch (...) { return StatusCode::kInvalidKernel; }
}
// =================================================================================================
// Compiles the templated class
template class Xgemv<float>;
template class Xgemv<double>;
template class Xgemv<float2>;
template class Xgemv<double2>;
// =================================================================================================
} // namespace clblast
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