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 uint64_t dbg_cnt0 = 0;
71 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 the
144 /// program was compiled) or "Stockfish <version number>", depending on whether
145 /// the constant EngineVersion (defined in misc.h) is empty.
147 const string engine_name() {
149 const string cpu64(CpuIs64Bit ? " 64bit" : "");
151 if (!EngineVersion.empty())
152 return AppName + " " + EngineVersion + cpu64;
154 string date(__DATE__); // From compiler, format is "Sep 21 2008"
155 string months("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec");
157 size_t mon = 1 + months.find(date.substr(0, 3)) / 4;
160 string day = (date[4] == ' ' ? date.substr(5, 1) : date.substr(4, 2));
162 string name = AppName + " " + AppTag + " ";
164 s << name << date.substr(date.length() - 2) << setfill('0')
165 << setw(2) << mon << setw(2) << day << cpu64;
171 /// get_system_time() returns the current system time, measured in
174 int get_system_time() {
176 #if defined(_MSC_VER)
179 return int(t.time*1000 + t.millitm);
182 gettimeofday(&t, NULL);
183 return t.tv_sec*1000 + t.tv_usec/1000;
188 /// cpu_count() tries to detect the number of CPU cores.
190 #if !defined(_MSC_VER)
192 # if defined(_SC_NPROCESSORS_ONLN)
194 return Min(sysconf(_SC_NPROCESSORS_ONLN), MAX_THREADS);
196 # elif defined(__hpux)
198 struct pst_dynamic psd;
199 if (pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0) == -1)
202 return Min(psd.psd_proc_cnt, MAX_THREADS);
215 return Min(s.dwNumberOfProcessors, MAX_THREADS);
222 From Beowulf, from Olithink
225 /* Non-windows version */
229 struct timeval timeout;
232 FD_SET(fileno(stdin), &readfds);
233 /* Set to timeout immediately */
236 select(16, &readfds, 0, 0, &timeout);
238 return (FD_ISSET(fileno(stdin), &readfds));
242 /* Windows-version */
251 /* If we're running under XBoard then we can't use _kbhit() as the input
252 * commands are sent to us directly over the internal pipe */
254 #if defined(FILE_CNT)
260 inh = GetStdHandle(STD_INPUT_HANDLE);
261 pipe = !GetConsoleMode(inh, &dw);
263 SetConsoleMode(inh, dw & ~(ENABLE_MOUSE_INPUT | ENABLE_WINDOW_INPUT));
264 FlushConsoleInputBuffer(inh);
268 if (!PeekNamedPipe(inh, NULL, 0, NULL, &dw, NULL))
272 // Count the number of unread input records, including keyboard,
273 // mouse, and window-resizing input records.
274 GetNumberOfConsoleInputEvents(inh, &dw);
278 // Read data from console without removing it from the buffer
279 INPUT_RECORD rec[256];
281 if (!PeekConsoleInput(inh, rec, Min(dw, 256), &recCnt))
284 // Search for at least one keyboard event
285 for (DWORD i = 0; i < recCnt; i++)
286 if (rec[i].EventType == KEY_EVENT)
295 /// prefetch() preloads the given address in L1/L2 cache. This is a non
296 /// blocking function and do not stalls the CPU waiting for data to be
297 /// loaded from RAM, that can be very slow.
298 #if defined(NO_PREFETCH)
299 void prefetch(char*) {}
302 void prefetch(char* addr) {
304 #if defined(__INTEL_COMPILER) || defined(__ICL)
305 // This hack prevents prefetches to be optimized away by
306 // Intel compiler. Both MSVC and gcc seems not affected.
310 _mm_prefetch(addr, _MM_HINT_T2);
311 _mm_prefetch(addr+64, _MM_HINT_T2); // 64 bytes ahead