text: 
  // =================================================================================================
  // 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 xger OpenCL kernels.
  //
  // =================================================================================================
  
  #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>
  class TuneXger {
   public:
  
    // The representative kernel and the source code
    static std::string KernelFamily() { return "xger"; }
    static std::string KernelName() { return "Xger"; }
    static std::string GetSources() {
      return
        #include "../src/kernels/common.opencl"
        #include "../src/kernels/level2/level2.opencl"
        #include "../src/kernels/level2/xger.opencl"
      ;
    }
  
    // The list of arguments relevant for this routine
    static std::vector<std::string> GetOptions() { return {kArgN, kArgM, kArgAlpha}; }
  
    // Tests for valid arguments
    static void TestValidArguments(const Arguments<T> &) { }
  
    // Sets the default values for the arguments
    static size_t DefaultM() { return 1024; }
    static size_t DefaultN() { return 1024; }
    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.m; }
    static size_t GetSizeY(const Arguments<T> &args) { return args.n; }
    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, "WGS1", {4, 8, 16, 32, 64, 128, 256, 512});
      tuner.AddParameter(id, "WGS2", {1, 2, 4, 8, 16, 32, 64, 128, 256});
      tuner.AddParameter(id, "WPT", {1, 2, 4});
    }
  
    // Sets the constraints and local memory size
    static void SetConstraints(cltune::Tuner &, const size_t) { }
    static void SetLocalMemorySize(cltune::Tuner &, const size_t, const Arguments<T> &) { }
  
    // Sets the base thread configuration
    static std::vector<size_t> GlobalSize(const Arguments<T> &args) { return {args.m, args.n}; }
    static std::vector<size_t> GlobalSizeRef(const Arguments<T> &args) { return GlobalSize(args); }
    static std::vector<size_t> LocalSize() { return {1, 1}; }
    static std::vector<size_t> LocalSizeRef() { return {8, 8}; }
  
    // Transforms the thread configuration based on the parameters
    using TransformVector = std::vector<std::vector<std::string>>;
    static TransformVector MulLocal() { return {{"WGS1", "WGS2"}}; }
    static TransformVector DivLocal() { return {}; }
    static TransformVector MulGlobal() { return {}; }
    static TransformVector DivGlobal() { return {{"WPT", "WPT"}}; }
  
    // 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};
      tuner.AddArgumentScalar(static_cast<int>(args.m));
      tuner.AddArgumentScalar(static_cast<int>(args.n));
      tuner.AddArgumentInput(alpha_buffer);
      tuner.AddArgumentInput(x_vec);
      tuner.AddArgumentScalar(0); // x_offset
      tuner.AddArgumentScalar(1); // x_increment
      tuner.AddArgumentInput(y_vec);
      tuner.AddArgumentScalar(0); // y_offset
      tuner.AddArgumentScalar(1); // y_increment
      tuner.AddArgumentOutput(a_mat);
      tuner.AddArgumentScalar(0); // a_offset
      tuner.AddArgumentScalar(static_cast<int>(args.m)); // a_ld
      tuner.AddArgumentScalar(0); // a_is_rowmajor
    }
  
    // Describes how to compute the performance metrics
    static size_t GetMetric(const Arguments<T> &args) {
      return (2*args.m*args.n + 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;
  
  // Main function (not within the clblast namespace)
  int main(int argc, char *argv[]) {
    switch(clblast::GetPrecision(argc, argv)) {
      case clblast::Precision::kHalf: clblast::Tuner<clblast::TuneXger<half>, half>(argc, argv); break;
      case clblast::Precision::kSingle: clblast::Tuner<clblast::TuneXger<float>, float>(argc, argv); break;
      case clblast::Precision::kDouble: clblast::Tuner<clblast::TuneXger<double>, double>(argc, argv); break;
      case clblast::Precision::kComplexSingle: clblast::Tuner<clblast::TuneXger<float2>, float2>(argc, argv); break;
      case clblast::Precision::kComplexDouble: clblast::Tuner<clblast::TuneXger<double2>, double2>(argc, argv); break;
    }
    return 0;
  }
  
  // =================================================================================================
  