1 files changed, 156 insertions, 0 deletions
diff --git a/src/tuning/kernels/xgemv.cpp b/src/tuning/kernels/xgemv.cpp
new file mode 100644
index 00000000..d42155ae
--- /dev/null
+++ b/src/tuning/kernels/xgemv.cpp
@@ -0,0 +1,156 @@
+
+// =================================================================================================
+// 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 uses the CLTune auto-tuner to tune the xgemv OpenCL kernels. Three variants are tuned:
+// 1: The full version of the kernel
+// 2: The fast version for non-transposed matrices
+// 3: The fast version for transposed matrices
+//
+// =================================================================================================
+
+#include <string>
+#include <vector>
+
+#include "utilities.hpp"
+#include "tuning/tuning.hpp"
+
+namespace clblast {
+// =================================================================================================
+
+// See comment at top of file for a description of the class
+template <typename T, int V>
+class TuneXgemv {
+ public:
+
+  // The representative kernel and the source code
+  static std::string KernelFamily() { return "xgemv_"+std::to_string(V); }
+  static std::string KernelName() { return (V==1) ? "Xgemv" : ((V==2) ? "XgemvFast" : "XgemvFastRot"); }
+  static std::string GetSources() {
+    return
+      #include "../src/kernels/common.opencl"
+      #include "../src/kernels/level2/xgemv.opencl"
+      #include "../src/kernels/level2/xgemv_fast.opencl"
+    ;
+  }
+
+  // The list of arguments relevant for this routine
+  static std::vector<std::string> GetOptions() { return {kArgM, kArgN, kArgAlpha, kArgBeta}; }
+
+  // Tests for valid arguments
+  static void TestValidArguments(const Arguments<T> &) { }
+
+  // Sets the default values for the arguments
+  static size_t DefaultM() { return 2048; }
+  static size_t DefaultN() { return 2048; }
+  static size_t DefaultK() { return 1; } // N/A for this kernel
+  static double DefaultFraction() { return 1.0; } // N/A for this kernel
+
+  // Describes how to obtain the sizes of the buffers
+  static size_t GetSizeX(const Arguments<T> &args) { return args.n; }
+  static size_t GetSizeY(const Arguments<T> &args) { return args.m; }
+  static size_t GetSizeA(const Arguments<T> &args) { return args.m * args.n; }
+  static size_t GetSizeB(const Arguments<T> &) { return 1; } // N/A for this kernel
+  static size_t GetSizeC(const Arguments<T> &) { return 1; } // N/A for this kernel
+  static size_t GetSizeTemp(const Arguments<T> &) { return 1; } // N/A for this kernel
+
+  // Sets the tuning parameters and their possible values
+  static void SetParameters(cltune::Tuner &tuner, const size_t id) {
+    tuner.AddParameter(id, "WGS"+std::to_string(V), {64, 128, 256});
+    tuner.AddParameter(id, "WPT"+std::to_string(V), {1, 2, 4});
+    if (V==2 || V==3) { tuner.AddParameter(id, "VW"+std::to_string(V), {1, 2, 4, 8}); }
+  }
+
+  // Sets the constraints and local memory size
+  static void SetConstraints(cltune::Tuner &tuner, const size_t id) {
+    auto MultipleOfX = [] (std::vector<size_t> v) { return IsMultiple(v[0], v[1]); };
+    if (V==2 || V==3) {
+      tuner.AddConstraint(id, MultipleOfX, {"WPT"+std::to_string(V), "VW"+std::to_string(V)});
+    }
+  }
+  static void SetLocalMemorySize(cltune::Tuner &tuner, const size_t id, const Arguments<T> &args) {
+    auto LocalMemorySize = [args] (std::vector<size_t> v) { return v[0]*GetBytes(args.precision); };
+    tuner.SetLocalMemoryUsage(id, LocalMemorySize, {"WGS"+std::to_string(V)});
+  }
+
+  // Sets the base thread configuration
+  static std::vector<size_t> GlobalSize(const Arguments<T> &args) { return {args.m}; }
+  static std::vector<size_t> GlobalSizeRef(const Arguments<T> &args) { return GlobalSize(args); }
+  static std::vector<size_t> LocalSize() { return {1}; }
+  static std::vector<size_t> LocalSizeRef() { return {64}; }
+
+  // Transforms the thread configuration based on the parameters
+  using TransformVector = std::vector<std::vector<std::string>>;
+  static TransformVector MulLocal() { return {{"WGS"+std::to_string(V)}}; }
+  static TransformVector DivLocal() { return {}; }
+  static TransformVector MulGlobal() { return {}; }
+  static TransformVector DivGlobal() { return {{"WPT"+std::to_string(V)}}; }
+
+  // Sets the kernel's arguments
+  static void SetArguments(cltune::Tuner &tuner, const Arguments<T> &args,
+                           std::vector<T> &x_vec, std::vector<T> &y_vec,
+                           std::vector<T> &a_mat, std::vector<T> &, std::vector<T> &,
+                           std::vector<T> &) {
+    auto alpha_buffer = std::vector<T>{args.alpha};
+    auto beta_buffer = std::vector<T>{args.beta};
+    auto a_rotated = (V==3) ? 1 : 0;
+    tuner.AddArgumentScalar(static_cast<int>(args.m));
+    tuner.AddArgumentScalar(static_cast<int>(args.n));
+    tuner.AddArgumentInput(alpha_buffer);
+    tuner.AddArgumentInput(beta_buffer);
+    tuner.AddArgumentScalar(static_cast<int>(a_rotated));
+    tuner.AddArgumentInput(a_mat);
+    tuner.AddArgumentScalar(0);
+    tuner.AddArgumentScalar(static_cast<int>(args.m));
+    tuner.AddArgumentInput(x_vec);
+    tuner.AddArgumentScalar(0);
+    tuner.AddArgumentScalar(1);
+    tuner.AddArgumentOutput(y_vec);
+    tuner.AddArgumentScalar(0);
+    tuner.AddArgumentScalar(1);
+    tuner.AddArgumentScalar(0); // Conjugate transpose
+    tuner.AddArgumentScalar(0); // Additional parameter
+    tuner.AddArgumentScalar(0); // Banded 'kl'
+    tuner.AddArgumentScalar(0); // Banded 'ku'
+  }
+
+  // Describes how to compute the performance metrics
+  static size_t GetMetric(const Arguments<T> &args) {
+    return (args.m*args.n + 2*args.m + args.n) * GetBytes(args.precision);
+  }
+  static std::string PerformanceUnit() { return "GB/s"; }
+};
+
+// =================================================================================================
+} // namespace clblast
+
+// Shortcuts to the clblast namespace
+using float2 = clblast::float2;
+using double2 = clblast::double2;
+
+// Function to tune a specific variation V (not within the clblast namespace)
+template <int V>
+void StartVariation(int argc, char *argv[]) {
+  switch(clblast::GetPrecision(argc, argv)) {
+    case clblast::Precision::kHalf: clblast::Tuner<clblast::TuneXgemv<half,V>, half>(argc, argv); break;
+    case clblast::Precision::kSingle: clblast::Tuner<clblast::TuneXgemv<float,V>, float>(argc, argv); break;
+    case clblast::Precision::kDouble: clblast::Tuner<clblast::TuneXgemv<double,V>, double>(argc, argv); break;
+    case clblast::Precision::kComplexSingle: clblast::Tuner<clblast::TuneXgemv<float2,V>, float2>(argc, argv); break;
+    case clblast::Precision::kComplexDouble: clblast::Tuner<clblast::TuneXgemv<double2,V>, double2>(argc, argv); break;
+  }
+}
+
+// Main function (not within the clblast namespace)
+int main(int argc, char *argv[]) {
+  StartVariation<1>(argc, argv);
+  StartVariation<2>(argc, argv);
+  StartVariation<3>(argc, argv);
+  return 0;
+}
+
+// =================================================================================================