Squashed feature branch:

* Added CUDA support
 * Performance improvements
 * API improvements
 * Added "depth" parameter to GEMM
 * Android cross-compilation

include/isaac/tools/timer.hpp

@@ -0,0 +1,122 @@
+/* =========================================================================
+   Copyright (c) 2010-2014, Institute for Microelectronics,
+                            Institute for Analysis and Scientific Computing,
+                            TU Wien.
+   Portions of this software are copyright by UChicago Argonne, LLC.
+
+                            -----------------
+                  ViennaCL - The Vienna Computing Library
+                            -----------------
+
+   Project Head:    Karl Rupp                   rupp@iue.tuwien.ac.at
+
+   (A list of authors and contributors can be found in the PDF manual)
+
+   License:         MIT (X11), see file LICENSE in the base directory
+============================================================================= */
+
+#ifndef _ISAAC_TOOLS_TIMER_HPP_
+#define _ISAAC_TOOLS_TIMER_HPP_
+
+/** @file   isaac/tools/timer.hpp
+    @brief  A simple, yet (mostly) sufficiently accurate timer for benchmarking and profiling. */
+
+#include <iostream>
+
+
+#ifdef _WIN32
+
+#define WINDOWS_LEAN_AND_MEAN
+#include <windows.h>
+#undef min
+#undef max
+
+namespace isaac
+{
+namespace tools
+{
+
+/** @brief Simple timer class based on gettimeofday (POSIX) or QueryPerformanceCounter (Windows).
+  *
+  * Avoids messing with Boost and should be sufficient for benchmarking purposes.
+  */
+class timer
+{
+public:
+
+  timer()
+  {
+    QueryPerformanceFrequency(&freq);
+  }
+
+  void start()
+  {
+    QueryPerformanceCounter((LARGE_INTEGER*) &start_time);
+  }
+
+  double get() const
+  {
+    LARGE_INTEGER  elapsed;
+    QueryPerformanceCounter((LARGE_INTEGER*) &end_time);
+    elapsed.QuadPart = end_time.QuadPart - start_time.QuadPart;
+    return elapsed.QuadPart / static_cast<double>(freq.QuadPart);
+  }
+
+
+private:
+  LARGE_INTEGER freq;
+  LARGE_INTEGER start_time;
+  LARGE_INTEGER end_time;
+};
+
+}
+
+}
+
+#else
+
+#include <sys/time.h>
+
+namespace isaac
+{
+namespace tools
+{
+
+/** @brief Simple timer class based on gettimeofday (POSIX) or QueryPerformanceCounter (Windows).
+  *
+  * Avoids messing with Boost and should be sufficient for benchmarking purposes.
+  */
+class timer
+{
+public:
+
+  timer() : ts(0)
+  {}
+
+  void start()
+  {
+    struct timeval tval;
+    gettimeofday(&tval, NULL);
+    ts = static_cast<double>(tval.tv_sec * 1000000 + tval.tv_usec);
+  }
+
+  double get() const
+  {
+    struct timeval tval;
+    gettimeofday(&tval, NULL);
+    double end_time = static_cast<double>(tval.tv_sec * 1000000 + tval.tv_usec);
+
+    return static_cast<double>(end_time-ts) / 1000000.0;
+  }
+
+private:
+  double ts;
+};
+
+}
+}
+
+
+
+#endif
+#endif