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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 Xaxpy class (see the header for information about the class).
//
// =================================================================================================
#include "routines/level1/xaxpy.hpp"
#include <string>
#include <vector>
namespace clblast {
// =================================================================================================
// Constructor: forwards to base class constructor
template <typename T>
Xaxpy<T>::Xaxpy(Queue &queue, EventPointer event, const std::string &name):
Routine(queue, event, name, {"Xaxpy"}, PrecisionValue<T>(), {}, {
#include "../../kernels/level1/level1.opencl"
#include "../../kernels/level1/xaxpy.opencl"
}) {
}
// =================================================================================================
// The main routine
template <typename T>
void Xaxpy<T>::DoAxpy(const size_t n, const T alpha,
const Buffer<T> &x_buffer, const size_t x_offset, const size_t x_inc,
const Buffer<T> &y_buffer, const size_t y_offset, const size_t y_inc) {
// Makes sure all dimensions are larger than zero
if (n == 0) { throw BLASError(StatusCode::kInvalidDimension); }
// Tests the vectors for validity
TestVectorX(n, x_buffer, x_offset, x_inc);
TestVectorY(n, y_buffer, y_offset, y_inc);
// Determines whether or not the fast-version can be used
const auto use_fast_kernel = (x_offset == 0) && (x_inc == 1) &&
(y_offset == 0) && (y_inc == 1) &&
IsMultiple(n, db_["WGS"]*db_["WPT"]*db_["VW"]);
// If possible, run the fast-version of the kernel
const auto kernel_name = (use_fast_kernel) ? "XaxpyFast" : "Xaxpy";
// Retrieves the Xaxpy 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>(n));
kernel.SetArgument(1, GetRealArg(alpha));
kernel.SetArgument(2, x_buffer());
kernel.SetArgument(3, y_buffer());
}
else {
kernel.SetArgument(0, static_cast<int>(n));
kernel.SetArgument(1, GetRealArg(alpha));
kernel.SetArgument(2, x_buffer());
kernel.SetArgument(3, static_cast<int>(x_offset));
kernel.SetArgument(4, static_cast<int>(x_inc));
kernel.SetArgument(5, y_buffer());
kernel.SetArgument(6, static_cast<int>(y_offset));
kernel.SetArgument(7, static_cast<int>(y_inc));
}
// Launches the kernel
if (use_fast_kernel) {
auto global = std::vector<size_t>{CeilDiv(n, db_["WPT"]*db_["VW"])};
auto local = std::vector<size_t>{db_["WGS"]};
RunKernel(kernel, queue_, device_, global, local, event_);
}
else {
const auto n_ceiled = Ceil(n, db_["WGS"]*db_["WPT"]);
auto global = std::vector<size_t>{n_ceiled/db_["WPT"]};
auto local = std::vector<size_t>{db_["WGS"]};
RunKernel(kernel, queue_, device_, global, local, event_);
}
}
// =================================================================================================
// Compiles the templated class
template class Xaxpy<half>;
template class Xaxpy<float>;
template class Xaxpy<double>;
template class Xaxpy<float2>;
template class Xaxpy<double2>;
// =================================================================================================
} // namespace clblast
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