Cache line aligned TT

[stockfish] / src / misc.cpp

diff --git a/src/misc.cpp b/src/misc.cpp
index 1a092c612fd2abc084acc27366d6644622c0d5d3..477fb392c6add636f01a46c7e0bf1b7ca51113c4 100644 (file)
--- a/src/misc.cpp
+++ b/src/misc.cpp
@@ -1,7 +1,7 @@
 /*
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
-  Copyright (C) 2008-2012 Marco Costalba, Joona Kiiski, Tord Romstad
+  Copyright (C) 2008-2013 Marco Costalba, Joona Kiiski, Tord Romstad
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -31,16 +31,16 @@
 using namespace std;
 
 /// Version number. If Version is left empty, then Tag plus current
-/// date (in the format YYMMDD) is used as a version number.
+/// date, in the format DD-MM-YY, are used as a version number.
 
 static const string Version = "";
 static const string Tag = "";
 
 
-/// engine_info() returns the full name of the current Stockfish version.
-/// This will be either "Stockfish YYMMDD" (where YYMMDD is the date when
-/// the program was compiled) or "Stockfish <version number>", depending
-/// on whether Version is empty.
+/// engine_info() returns the full name of the current Stockfish version. This
+/// will be either "Stockfish <Tag> DD-MM-YY" (where DD-MM-YY is the date when
+/// the program was compiled) or "Stockfish <Version>", depending on whether
+/// Version is empty.
 
 const string engine_info(bool to_uci) {
 
@@ -57,8 +57,8 @@ const string engine_info(bool to_uci) {
   {
       date >> month >> day >> year;
 
-      s << Tag << setfill('0') << " " << year.substr(2)
-        << setw(2) << (1 + months.find(month) / 4) << setw(2) << day;
+      s << Tag << string(Tag.empty() ? "" : " ") << setfill('0') << setw(2) << day
+        << "-" << setw(2) << (1 + months.find(month) / 4) << "-" << year.substr(2);
   }
 
   s << cpu64 << popcnt << (to_uci ? "\nid author ": " by ")
@@ -68,6 +68,13 @@ const string engine_info(bool to_uci) {
 }
 
 
+/// Convert system time to milliseconds. That's all we need.
+
+Time::point Time::now() {
+  sys_time_t t; system_time(&t); return time_to_msec(t);
+}
+
+
 /// Debug functions used mainly to collect run-time statistics
 
 static uint64_t hits[2], means[2];
@@ -146,6 +153,23 @@ public:
 };
 
 
+/// Used to serialize access to std::cout to avoid multiple threads to write at
+/// the same time.
+
+std::ostream& operator<<(std::ostream& os, SyncCout sc) {
+
+  static Mutex m;
+
+  if (sc == io_lock)
+      m.lock();
+
+  if (sc == io_unlock)
+      m.unlock();
+
+  return os;
+}
+
+
 /// Trampoline helper to avoid moving Logger to misc.h
 void start_logger(bool b) { Logger::start(b); }
 
@@ -184,7 +208,7 @@ void timed_wait(WaitCondition& sleepCond, Lock& sleepLock, int msec) {
   int tm = msec;
 #else
   timespec ts, *tm = &ts;
-  uint64_t ms = Time::current_time().msec() + msec;
+  uint64_t ms = Time::now() + msec;
 
   ts.tv_sec = ms / 1000;
   ts.tv_nsec = (ms % 1000) * 1000000LL;
@@ -203,18 +227,19 @@ void prefetch(char*) {}
 
 #else
 
-#   include <xmmintrin.h>
-
 void prefetch(char* addr) {
 
-#  if defined(__INTEL_COMPILER) || defined(__ICL)
+#  if defined(__INTEL_COMPILER)
    // This hack prevents prefetches to be optimized away by
    // Intel compiler. Both MSVC and gcc seems not affected.
    __asm__ ("");
 #  endif
 
-  _mm_prefetch(addr, _MM_HINT_T2);
-  _mm_prefetch(addr+64, _MM_HINT_T2); // 64 bytes ahead
+#  if defined(__INTEL_COMPILER) || defined(_MSC_VER)
+  _mm_prefetch(addr, _MM_HINT_T0);
+#  else
+  __builtin_prefetch(addr);
+#  endif
 }
 
 #endif