From 8854a731276b3f32c9e381a228733de7c6d95760 Mon Sep 17 00:00:00 2001
From: Cedric Nugteren <web@cedricnugteren.nl>
Date: Sat, 20 Feb 2016 12:40:01 +0100
Subject: Added XGER routine, kernel, and tuner

---
 src/routines/level2/xger.cc | 107 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 src/routines/level2/xger.cc

(limited to 'src/routines')

diff --git a/src/routines/level2/xger.cc b/src/routines/level2/xger.cc
new file mode 100644
index 00000000..c3a24264
--- /dev/null
+++ b/src/routines/level2/xger.cc
@@ -0,0 +1,107 @@
+
+// =================================================================================================
+// 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 Xger class (see the header for information about the class).
+//
+// =================================================================================================
+
+#include "internal/routines/level2/xger.h"
+
+#include <string>
+#include <vector>
+
+namespace clblast {
+// =================================================================================================
+
+// Specific implementations to get the memory-type based on a template argument
+template <> const Precision Xger<float>::precision_ = Precision::kSingle;
+template <> const Precision Xger<double>::precision_ = Precision::kDouble;
+
+// =================================================================================================
+
+// Constructor: forwards to base class constructor
+template <typename T>
+Xger<T>::Xger(Queue &queue, Event &event, const std::string &name):
+    Routine<T>(queue, event, name, {"Xger"}, precision_) {
+  source_string_ =
+    #include "../../kernels/level2/xger.opencl"
+  ;
+}
+
+// =================================================================================================
+
+// The main routine
+template <typename T>
+StatusCode Xger<T>::DoGer(const Layout layout,
+                          const size_t m, 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,
+                          const Buffer<T> &a_buffer, const size_t a_offset, const size_t a_ld) {
+
+  // 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).
+  const auto a_is_rowmajor = (layout == Layout::kRowMajor);
+  const auto a_one = (a_is_rowmajor) ? n : m;
+  const auto a_two = (a_is_rowmajor) ? m : n;
+
+  // 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(m, 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; }
+
+  // Retrieves the Xgemv kernel from the compiled binary
+  try {
+    auto& program = GetProgramFromCache();
+    auto kernel = Kernel(program, "Xger");
+
+    // Sets the kernel arguments
+    kernel.SetArgument(0, static_cast<int>(a_one));
+    kernel.SetArgument(1, static_cast<int>(a_two));
+    kernel.SetArgument(2, alpha);
+    kernel.SetArgument(3, x_buffer());
+    kernel.SetArgument(4, static_cast<int>(x_offset));
+    kernel.SetArgument(5, static_cast<int>(x_inc));
+    kernel.SetArgument(6, y_buffer());
+    kernel.SetArgument(7, static_cast<int>(y_offset));
+    kernel.SetArgument(8, static_cast<int>(y_inc));
+    kernel.SetArgument(9, a_buffer());
+    kernel.SetArgument(10, static_cast<int>(a_offset));
+    kernel.SetArgument(11, static_cast<int>(a_ld));
+    kernel.SetArgument(12, static_cast<int>(a_is_rowmajor));
+
+    // Launches the kernel
+    auto a_one_ceiled = CeilDiv(Ceil(a_one, db_["WGS1"]), db_["WPT"]);
+    auto a_two_ceiled = CeilDiv(Ceil(a_two, db_["WGS2"]), db_["WPT"]);
+    auto global = std::vector<size_t>{a_one_ceiled, a_two_ceiled};
+    auto local = std::vector<size_t>{db_["WGS1"], db_["WGS2"]};
+    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 Xger<float>;
+template class Xger<double>;
+
+// =================================================================================================
+} // namespace clblast
-- 
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