From e522d1a74e6a877f32730da4807f54cf9a996679 Mon Sep 17 00:00:00 2001
From: CNugteren <web@cedricnugteren.nl>
Date: Sat, 13 Jun 2015 11:01:20 +0200
Subject: Added initial version of GEMV including tester and performance client

---
 src/routines/xgemv.cc | 117 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100644 src/routines/xgemv.cc

(limited to 'src/routines')

diff --git a/src/routines/xgemv.cc b/src/routines/xgemv.cc
new file mode 100644
index 00000000..67f9536e
--- /dev/null
+++ b/src/routines/xgemv.cc
@@ -0,0 +1,117 @@
+
+// =================================================================================================
+// 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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