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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 Xher class (see the header for information about the class).
+//
+// =================================================================================================
+
+#include "routines/level2/xher.hpp"
+
+#include <string>
+
+namespace clblast {
+// =================================================================================================
+
+// Constructor: forwards to base class constructor
+template <typename T, typename U>
+Xher<T,U>::Xher(Queue &queue, EventPointer event, const std::string &name):
+ Routine(queue, event, name, {"Xger"}, PrecisionValue<T>()) {
+ source_string_ =
+ #include "../../kernels/level2/level2.opencl"
+ #include "../../kernels/level2/xher.opencl"
+ ;
+}
+
+// =================================================================================================
+
+// Specializations to compute alpha of type 'T'
+template <> float2 Xher<float2,float>::GetAlpha(const float alpha) { return float2{alpha, 0.0f}; }
+template <> double2 Xher<double2,double>::GetAlpha(const double alpha) { return double2{alpha, 0.0}; }
+template <> float Xher<float,float>::GetAlpha(const float alpha) { return alpha; }
+template <> double Xher<double,double>::GetAlpha(const double alpha) { return alpha; }
+template <> half Xher<half,half>::GetAlpha(const half alpha) { return alpha; }
+
+// =================================================================================================
+
+// The main routine
+template <typename T, typename U>
+StatusCode Xher<T,U>::DoHer(const Layout layout, const Triangle triangle,
+ const size_t n,
+ const U alpha,
+ const Buffer<T> &x_buffer, const size_t x_offset, const size_t x_inc,
+ const Buffer<T> &a_buffer, const size_t a_offset, const size_t a_ld,
+ const bool packed) {
+
+ // Makes sure the dimensions are larger than zero
+ if (n == 0) { return StatusCode::kInvalidDimension; }
+
+ // The data is either in the upper or lower triangle
+ const auto is_upper = ((triangle == Triangle::kUpper && layout != Layout::kRowMajor) ||
+ (triangle == Triangle::kLower && layout == Layout::kRowMajor));
+ const auto is_rowmajor = (layout == Layout::kRowMajor);
+
+ // Tests the matrix and the vectors for validity
+ auto status = StatusCode::kSuccess;
+ if (packed) { status = TestMatrixAP(n, a_buffer, a_offset); }
+ else { status = TestMatrixA(n, n, a_buffer, a_offset, a_ld); }
+ if (ErrorIn(status)) { return status; }
+ status = TestVectorX(n, x_buffer, x_offset, x_inc);
+ if (ErrorIn(status)) { return status; }
+
+ // If alpha is zero an update is not required
+ if (alpha == U{0}) { return StatusCode::kSuccess; }
+
+ // Creates a matching version of alpha
+ const auto matching_alpha = GetAlpha(alpha);
+
+ // 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, &matching_alpha);
+
+ // Retrieves the kernel from the compiled binary
+ try {
+ const auto program = GetProgramFromCache(context_, PrecisionValue<T>(), routine_name_);
+ auto kernel = Kernel(program, "Xher");
+
+ // Sets the kernel arguments
+ kernel.SetArgument(0, static_cast<int>(n));
+ kernel.SetArgument(1, alpha_buffer());
+ kernel.SetArgument(2, x_buffer());
+ kernel.SetArgument(3, static_cast<int>(x_offset));
+ kernel.SetArgument(4, static_cast<int>(x_inc));
+ kernel.SetArgument(5, a_buffer());
+ kernel.SetArgument(6, static_cast<int>(a_offset));
+ kernel.SetArgument(7, static_cast<int>(a_ld));
+ kernel.SetArgument(8, static_cast<int>(is_upper));
+ kernel.SetArgument(9, static_cast<int>(is_rowmajor));
+
+ // Launches the kernel
+ auto global_one = Ceil(CeilDiv(n, db_["WPT"]), db_["WGS1"]);
+ auto global_two = Ceil(CeilDiv(n, db_["WPT"]), db_["WGS2"]);
+ auto global = std::vector<size_t>{global_one, global_two};
+ auto local = std::vector<size_t>{db_["WGS1"], db_["WGS2"]};
+ status = RunKernel(kernel, queue_, device_, global, local, event_);
+ if (ErrorIn(status)) { return status; }
+
+ // Succesfully finished the computation
+ return StatusCode::kSuccess;
+ } catch (...) { return StatusCode::kInvalidKernel; }
+}
+
+// =================================================================================================
+
+// Compiles the templated class
+template class Xher<half, half>;
+template class Xher<float, float>;
+template class Xher<double, double>;
+template class Xher<float2, float>;
+template class Xher<double2, double>;
+
+// =================================================================================================
+} // namespace clblast