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diff --git a/src/tuning/kernels/xaxpy.hpp b/src/tuning/kernels/xaxpy.hpp
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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 uses the auto-tuner to tune the xaxpy OpenCL kernels.
+//
+// =================================================================================================
+
+#include <string>
+#include <vector>
+
+#include "utilities/utilities.hpp"
+#include "tuning/tuning.hpp"
+
+namespace clblast {
+// =================================================================================================
+
+// Settings for this kernel (default command-line arguments)
+TunerDefaults XaxpyGetTunerDefaults(const int) {
+  auto settings = TunerDefaults();
+  settings.options = {kArgN, kArgAlpha};
+  settings.default_n = 4096*1024;
+  return settings;
+}
+
+// Settings for this kernel (general)
+template <typename T>
+TunerSettings XaxpyGetTunerSettings(const int, const Arguments<T> &args) {
+  auto settings = TunerSettings();
+
+  // Identification of the kernel
+  settings.kernel_family = "xaxpy";
+  settings.kernel_name = "XaxpyFastest";
+  settings.sources =
+#include "../src/kernels/level1/level1.opencl"
+#include "../src/kernels/level1/xaxpy.opencl"
+  ;
+
+  // Buffer sizes
+  settings.size_x = args.n;
+  settings.size_y = args.n;
+
+  // Inputs and outputs IDs (X:0, Y:1, A:2, B:3, C:4, temp:5)
+  settings.inputs = {0, 1};
+  settings.outputs = {1};
+
+  // Sets the base thread configuration
+  settings.global_size = {args.n};
+  settings.global_size_ref = settings.global_size;
+  settings.local_size = {1};
+  settings.local_size_ref = {64};
+
+  // Transforms the thread configuration based on the parameters
+  settings.mul_local = {{"WGS"}};
+  settings.div_global = {{"WPT"},{"VW"}};
+
+  // Sets the tuning parameters and their possible values
+  settings.parameters = {
+    {"WGS", {64, 128, 256, 512, 1024, 2048}},
+    {"WPT", {1, 2, 4, 8}},
+    {"VW", {1, 2, 4, 8}},
+  };
+
+  // Describes how to compute the performance metrics
+  settings.metric_amount = 3 * args.n * GetBytes(args.precision);
+  settings.performance_unit = "GB/s";
+
+  return settings;
+}
+
+// Tests for valid arguments
+template <typename T>
+void XaxpyTestValidArguments(const int, const Arguments<T> &args) {
+  if (!IsMultiple(args.n, 64)) {
+    throw std::runtime_error("'XaxpyFastest' requires 'n' to be a multiple of WGS*WPT*VW");
+  }
+}
+std::vector<Constraint> XaxpySetConstraints(const int) { return {}; }
+
+// Sets the kernel's arguments
+template <typename T>
+void XaxpySetArguments(const int, Kernel &kernel, const Arguments<T> &args, std::vector<Buffer<T>>& buffers) {
+  kernel.SetArgument(0, static_cast<int>(args.n));
+  kernel.SetArgument(1, GetRealArg(args.alpha));
+  kernel.SetArgument(2, buffers[0]()); // 0 == X vector
+  kernel.SetArgument(3, buffers[1]()); // 1 == Y vector
+}
+
+// =================================================================================================
+} // namespace clblast