project directories reorganization

benchmarks/old_opencl/bfs/timer.h

@@ -0,0 +1,101 @@
+#ifndef timer_h
+#define timer_h
+
+#include <iostream>
+
+class timer {
+public:
+  timer(const char *name = 0);
+  timer(const char *name, std::ostream &write_on_exit);
+
+  ~timer();
+
+  void start(), stop();
+  void reset();
+  std::ostream &print(std::ostream &);
+
+  double getTimeInSeconds();
+
+private:
+  void print_time(std::ostream &, const char *which, double time) const;
+
+  union {
+    long long total_time;
+    struct {
+#if defined __PPC__
+      int high, low;
+#else
+      int low, high;
+#endif
+    };
+  };
+
+  unsigned long long count;
+  const char *const name;
+  std::ostream *const write_on_exit;
+
+  static double CPU_speed_in_MHz, get_CPU_speed_in_MHz();
+};
+
+std::ostream &operator<<(std::ostream &, class timer &);
+
+inline void timer::reset() {
+  total_time = 0;
+  count = 0;
+}
+
+inline timer::timer(const char *name) : name(name), write_on_exit(0) {
+  reset();
+}
+
+inline timer::timer(const char *name, std::ostream &write_on_exit)
+    : name(name), write_on_exit(&write_on_exit) {
+  reset();
+}
+
+inline timer::~timer() {
+  if (write_on_exit != 0)
+    print(*write_on_exit);
+}
+
+inline void timer::start() {
+#if (defined __PATHSCALE__) && (defined __i386 || defined __x86_64)
+  unsigned eax, edx;
+
+  asm volatile("rdtsc" : "=a"(eax), "=d"(edx));
+
+  total_time -= ((unsigned long long)edx << 32) + eax;
+#elif (defined __GNUC__ || defined __INTEL_COMPILER) &&                        \
+    (defined __i386 || defined __x86_64)
+  asm volatile("rdtsc\n\t"
+               "subl %%eax, %0\n\t"
+               "sbbl %%edx, %1"
+               : "+m"(low), "+m"(high)
+               :
+               : "eax", "edx");
+#else
+#error Compiler/Architecture not recognized
+#endif
+}
+
+inline void timer::stop() {
+#if (defined __PATHSCALE__) && (defined __i386 || defined __x86_64)
+  unsigned eax, edx;
+
+  asm volatile("rdtsc" : "=a"(eax), "=d"(edx));
+
+  total_time += ((unsigned long long)edx << 32) + eax;
+#elif (defined __GNUC__ || defined __INTEL_COMPILER) &&                        \
+    (defined __i386 || defined __x86_64)
+  asm volatile("rdtsc\n\t"
+               "addl %%eax, %0\n\t"
+               "adcl %%edx, %1"
+               : "+m"(low), "+m"(high)
+               :
+               : "eax", "edx");
+#endif
+
+  ++count;
+}
+
+#endif