2 Stockfish, a UCI chess playing engine derived from Glaurung 2.1
3 Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
4 Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
6 Stockfish is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 Stockfish is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #if !defined(_MSC_VER)
27 # include <sys/time.h>
28 # include <sys/types.h>
31 # include <sys/pstat.h>
36 #define _CRT_SECURE_NO_DEPRECATE
38 #include <sys/timeb.h>
42 #if !defined(NO_PREFETCH)
43 # include <xmmintrin.h>
58 /// Version number. If this is left empty, the current date (in the format
59 /// YYMMDD) is used as a version number.
61 static const string EngineVersion = "";
62 static const string AppName = "Stockfish";
63 static const string AppTag = "";
70 static uint64_t dbg_cnt0 = 0;
71 static uint64_t dbg_cnt1 = 0;
73 bool dbg_show_mean = false;
74 bool dbg_show_hit_rate = false;
81 void dbg_hit_on(bool b) {
83 assert(!dbg_show_mean);
84 dbg_show_hit_rate = true;
90 void dbg_hit_on_c(bool c, bool b) {
98 assert(!dbg_show_mean);
99 dbg_show_hit_rate = true;
105 assert(!dbg_show_mean);
106 dbg_show_hit_rate = true;
110 void dbg_mean_of(int v) {
112 assert(!dbg_show_hit_rate);
113 dbg_show_mean = true;
118 void dbg_print_hit_rate() {
120 cout << "Total " << dbg_cnt0 << " Hit " << dbg_cnt1
121 << " hit rate (%) " << (dbg_cnt1*100)/(dbg_cnt0 ? dbg_cnt0 : 1) << endl;
124 void dbg_print_mean() {
126 cout << "Total " << dbg_cnt0 << " Mean "
127 << (float)dbg_cnt1 / (dbg_cnt0 ? dbg_cnt0 : 1) << endl;
130 void dbg_print_hit_rate(ofstream& logFile) {
132 logFile << "Total " << dbg_cnt0 << " Hit " << dbg_cnt1
133 << " hit rate (%) " << (dbg_cnt1*100)/(dbg_cnt0 ? dbg_cnt0 : 1) << endl;
136 void dbg_print_mean(ofstream& logFile) {
138 logFile << "Total " << dbg_cnt0 << " Mean "
139 << (float)dbg_cnt1 / (dbg_cnt0 ? dbg_cnt0 : 1) << endl;
142 /// engine_name() returns the full name of the current Stockfish version.
143 /// This will be either "Stockfish YYMMDD" (where YYMMDD is the date when
144 /// the program was compiled) or "Stockfish <version number>", depending
145 /// on whether the constant EngineVersion (defined in misc.h) is empty.
147 const string engine_name() {
149 const string months("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec");
150 const string cpu64(CpuIs64Bit ? " 64bit" : "");
152 if (!EngineVersion.empty())
153 return AppName + " " + EngineVersion + cpu64;
155 stringstream s, date(__DATE__); // From compiler, format is "Sep 21 2008"
156 string month, day, year;
158 date >> month >> day >> year;
160 s << setfill('0') << AppName + " " + AppTag + " "
161 << year.substr(2, 2) << setw(2)
162 << (1 + months.find(month) / 4) << setw(2)
169 /// get_system_time() returns the current system time, measured in
172 int get_system_time() {
174 #if defined(_MSC_VER)
177 return int(t.time*1000 + t.millitm);
180 gettimeofday(&t, NULL);
181 return t.tv_sec*1000 + t.tv_usec/1000;
186 /// cpu_count() tries to detect the number of CPU cores.
188 #if !defined(_MSC_VER)
190 # if defined(_SC_NPROCESSORS_ONLN)
192 return Min(sysconf(_SC_NPROCESSORS_ONLN), MAX_THREADS);
194 # elif defined(__hpux)
196 struct pst_dynamic psd;
197 if (pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0) == -1)
200 return Min(psd.psd_proc_cnt, MAX_THREADS);
213 return Min(s.dwNumberOfProcessors, MAX_THREADS);
219 /// Check for console input. Original code from Beowulf and Olithink
226 struct timeval timeout;
229 FD_SET(fileno(stdin), &readfds);
230 timeout.tv_sec = 0; // Set to timeout immediately
232 select(16, &readfds, 0, 0, &timeout);
234 return (FD_ISSET(fileno(stdin), &readfds));
241 static HANDLE inh = NULL;
243 INPUT_RECORD rec[256];
248 inh = GetStdHandle(STD_INPUT_HANDLE);
249 usePipe = !GetConsoleMode(inh, &dw);
252 SetConsoleMode(inh, dw & ~(ENABLE_MOUSE_INPUT | ENABLE_WINDOW_INPUT));
253 FlushConsoleInputBuffer(inh);
257 // If we're running under XBoard then we can't use PeekConsoleInput() as
258 // the input commands are sent to us directly over the internal pipe.
260 return PeekNamedPipe(inh, NULL, 0, NULL, &dw, NULL) ? dw : 1;
262 // Count the number of unread input records, including keyboard,
263 // mouse, and window-resizing input records.
264 GetNumberOfConsoleInputEvents(inh, &dw);
266 // Read data from console without removing it from the buffer
267 if (dw <= 0 || !PeekConsoleInput(inh, rec, Min(dw, 256), &recCnt))
270 // Search for at least one keyboard event
271 for (DWORD i = 0; i < recCnt; i++)
272 if (rec[i].EventType == KEY_EVENT)
281 /// prefetch() preloads the given address in L1/L2 cache. This is a non
282 /// blocking function and do not stalls the CPU waiting for data to be
283 /// loaded from RAM, that can be very slow.
284 #if defined(NO_PREFETCH)
285 void prefetch(char*) {}
288 void prefetch(char* addr) {
290 #if defined(__INTEL_COMPILER) || defined(__ICL)
291 // This hack prevents prefetches to be optimized away by
292 // Intel compiler. Both MSVC and gcc seems not affected.
296 _mm_prefetch(addr, _MM_HINT_T2);
297 _mm_prefetch(addr+64, _MM_HINT_T2); // 64 bytes ahead