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Diffstat (limited to 'src/routines/level1/xaxpy.cc')
| -rw-r--r-- | src/routines/level1/xaxpy.cc | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/routines/level1/xaxpy.cc b/src/routines/level1/xaxpy.cc new file mode 100644 index 00000000..fba36851 --- /dev/null +++ b/src/routines/level1/xaxpy.cc @@ -0,0 +1,115 @@ + +// ================================================================================================= +// 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 "internal/routines/level1/xaxpy.h" + +#include <string> +#include <vector> + +namespace clblast { +// ================================================================================================= + +// Specific implementations to get the memory-type based on a template argument +template <> const Precision Xaxpy<float>::precision_ = Precision::kSingle; +template <> const Precision Xaxpy<double>::precision_ = Precision::kDouble; +template <> const Precision Xaxpy<float2>::precision_ = Precision::kComplexSingle; +template <> const Precision Xaxpy<double2>::precision_ = Precision::kComplexDouble; + +// ================================================================================================= + +// Constructor: forwards to base class constructor +template <typename T> +Xaxpy<T>::Xaxpy(CommandQueue &queue, Event &event): + Routine(queue, event, {"Xaxpy"}, precision_) { +} + +// ================================================================================================= + +// The main routine +template <typename T> +StatusCode Xaxpy<T>::DoAxpy(const size_t n, const T alpha, + const Buffer &x_buffer, const size_t x_offset, const size_t x_inc, + const Buffer &y_buffer, const size_t y_offset, const size_t y_inc) { + + // Makes sure all dimensions are larger than zero + if (n == 0) { return StatusCode::kInvalidDimension; } + + // Tests the vectors for validity + auto status = TestVectorX(n, x_buffer, x_offset, x_inc, sizeof(T)); + if (ErrorIn(status)) { return status; } + status = TestVectorY(n, y_buffer, y_offset, y_inc, sizeof(T)); + if (ErrorIn(status)) { return status; } + + // Determines whether or not the fast-version can be used + bool 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 + auto kernel_name = (use_fast_kernel) ? "XaxpyFast" : "Xaxpy"; + + // Retrieves the Xaxpy kernel from the compiled binary + try { + auto& program = GetProgramFromCache(); + auto kernel = Kernel(program, kernel_name); + + // Sets the kernel arguments + if (use_fast_kernel) { + kernel.SetArgument(0, static_cast<int>(n)); + kernel.SetArgument(1, alpha); + kernel.SetArgument(2, x_buffer()); + kernel.SetArgument(3, y_buffer()); + } + else { + kernel.SetArgument(0, static_cast<int>(n)); + kernel.SetArgument(1, 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"]}; + status = RunKernel(kernel, global, local); + } + else { + 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"]}; + 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 Xaxpy<float>; +template class Xaxpy<double>; +template class Xaxpy<float2>; +template class Xaxpy<double2>; + +// ================================================================================================= +} // namespace clblast |