X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmisc.cpp;h=5e851f12f6ded08dfdebb1c967e12bd822b30367;hp=ecd6a499fc5e75eb24cc2cd9989c13310ab773de;hb=d58176bfead421088bb3543b3cb6d1c359a3c91b;hpb=c2c0ba875f429e497c936b61be9f75dcc88385a9 diff --git a/src/misc.cpp b/src/misc.cpp index ecd6a499..5e851f12 100644 --- a/src/misc.cpp +++ b/src/misc.cpp @@ -1,13 +1,14 @@ /* - Glaurung, a UCI chess playing engine. - Copyright (C) 2004-2008 Tord Romstad + Stockfish, a UCI chess playing engine derived from Glaurung 2.1 + Copyright (C) 2004-2008 Tord Romstad (Glaurung author) + Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad - Glaurung is free software: you can redistribute it and/or modify + Stockfish is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. - Glaurung is distributed in the hope that it will be useful, + Stockfish is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. @@ -16,170 +17,216 @@ along with this program. If not, see . */ - -//// -//// Includes -//// - #if !defined(_MSC_VER) # include # include # include +# if defined(__hpux) +# include +# endif #else -# include -# include -# include "dos.h" -int gettimeofday(struct timeval * tp, struct timezone * tzp); +#define _CRT_SECURE_NO_DEPRECATE +#define NOMINMAX // disable macros min() and max() +#include +#include #endif +#if !defined(NO_PREFETCH) +# include +#endif + +#include #include #include #include #include +#include +#include "bitcount.h" #include "misc.h" +#include "thread.h" + +using namespace std; + +/// Version number. If EngineVersion is left empty, then AppTag plus +/// current date (in the format YYMMDD) is used as a version number. + +static const string AppName = "Stockfish"; +static const string EngineVersion = ""; +static const string AppTag = ""; + + +/// engine_name() 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 ", depending +/// on whether the constant EngineVersion is empty. + +const string engine_name() { + + const string months("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec"); + const string cpu64(CpuIs64Bit ? " 64bit" : ""); + + if (!EngineVersion.empty()) + return AppName + " " + EngineVersion + cpu64; + + stringstream s, date(__DATE__); // From compiler, format is "Sep 21 2008" + string month, day, year; + + date >> month >> day >> year; + + s << setfill('0') << AppName + " " + AppTag + " " + << year.substr(2, 2) << setw(2) + << (1 + months.find(month) / 4) << setw(2) + << day << cpu64; + + return s.str(); +} + +/// Our brave developers! Required by UCI -//// -//// Variables -//// +const string engine_authors() { -long dbg_cnt0 = 0; -long dbg_cnt1 = 0; + return "Tord Romstad, Marco Costalba and Joona Kiiski"; +} -//// -//// Functions -//// +/// Debug stuff. Helper functions used mainly for debugging purposes + +static uint64_t dbg_hit_cnt0; +static uint64_t dbg_hit_cnt1; +static uint64_t dbg_mean_cnt0; +static uint64_t dbg_mean_cnt1; void dbg_print_hit_rate() { - std::cout << "Total " << dbg_cnt0 << " Hit " << dbg_cnt1 - << " hit rate (%) " << (dbg_cnt1*100)/(dbg_cnt0 ? dbg_cnt0 : 1) - << std::endl; + if (dbg_hit_cnt0) + cerr << "Total " << dbg_hit_cnt0 << " Hit " << dbg_hit_cnt1 + << " hit rate (%) " << 100 * dbg_hit_cnt1 / dbg_hit_cnt0 << endl; } -/// engine_name() returns the full name of the current Glaurung version. -/// This will be either "Glaurung YYMMDD" (where YYMMDD is the date when the -/// program was compiled) or "Glaurung ", depending on whether -/// the constant EngineVersion (defined in misc.h) is empty. - -const std::string engine_name() { - if(EngineVersion == "") { - static const char monthNames[12][4] = { - "Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec" - }; - const char *dateString = __DATE__; - std::stringstream s; - int month = 0, day = 0; - - for(int i = 0; i < 12; i++) - if(strncmp(dateString, monthNames[i], 3) == 0) - month = i + 1; - day = atoi(dateString+4); - - s << "Glaurung " << (dateString+9) << std::setfill('0') << std::setw(2) - << month << std::setfill('0') << std::setw(2) << day; - - return s.str(); - } - else - return "Glaurung " + EngineVersion; +void dbg_print_mean() { + + if (dbg_mean_cnt0) + cerr << "Total " << dbg_mean_cnt0 << " Mean " + << (float)dbg_mean_cnt1 / dbg_mean_cnt0 << endl; +} + +void dbg_mean_of(int v) { + + dbg_mean_cnt0++; + dbg_mean_cnt1 += v; } +void dbg_hit_on(bool b) { + + dbg_hit_cnt0++; + if (b) + dbg_hit_cnt1++; +} + +void dbg_hit_on_c(bool c, bool b) { if (c) dbg_hit_on(b); } +void dbg_before() { dbg_hit_on(false); } +void dbg_after() { dbg_hit_on(true); dbg_hit_cnt0--; } -/// get_system_time() returns the current system time, measured in -/// milliseconds. + +/// get_system_time() returns the current system time, measured in milliseconds int get_system_time() { + +#if defined(_MSC_VER) + struct _timeb t; + _ftime(&t); + return int(t.time * 1000 + t.millitm); +#else struct timeval t; gettimeofday(&t, NULL); - return t.tv_sec*1000 + t.tv_usec/1000; + return t.tv_sec * 1000 + t.tv_usec / 1000; +#endif } -/// cpu_count() tries to detect the number of CPU cores. +/// cpu_count() tries to detect the number of CPU cores -#if !defined(_MSC_VER) +int cpu_count() { + +#if defined(_MSC_VER) + SYSTEM_INFO s; + GetSystemInfo(&s); + return std::min(int(s.dwNumberOfProcessors), MAX_THREADS); +#else # if defined(_SC_NPROCESSORS_ONLN) -int cpu_count() { - return Min(sysconf(_SC_NPROCESSORS_ONLN), 8); -} + return std::min((int)sysconf(_SC_NPROCESSORS_ONLN), MAX_THREADS); +# elif defined(__hpux) + struct pst_dynamic psd; + if (pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0) == -1) + return 1; + return std::min((int)psd.psd_proc_cnt, MAX_THREADS); # else -int cpu_count() { return 1; -} # endif +#endif +} + + +/// timed_wait() waits for msec milliseconds. It is mainly an helper to wrap +/// conversion from milliseconds to struct timespec, as used by pthreads. + +#if defined(_MSC_VER) + +void timed_wait(WaitCondition* sleepCond, Lock* sleepLock, int msec) { + cond_timedwait(sleepCond, sleepLock, msec); +} + #else -int cpu_count() { - SYSTEM_INFO s; - GetSystemInfo(&s); - return Min(s.dwNumberOfProcessors, 8); +void timed_wait(WaitCondition* sleepCond, Lock* sleepLock, int msec) { + + struct timeval t; + struct timespec abstime; + + gettimeofday(&t, NULL); + + abstime.tv_sec = t.tv_sec + (msec / 1000); + abstime.tv_nsec = (t.tv_usec + (msec % 1000) * 1000) * 1000; + + if (abstime.tv_nsec > 1000000000LL) + { + abstime.tv_sec += 1; + abstime.tv_nsec -= 1000000000LL; + } + + cond_timedwait(sleepCond, sleepLock, &abstime); } #endif -/* - From Beowulf, from Olithink -*/ -#ifndef _WIN32 -/* Non-windows version */ -int Bioskey() -{ - fd_set readfds; - struct timeval timeout; - - FD_ZERO(&readfds); - FD_SET(fileno(stdin), &readfds); - /* Set to timeout immediately */ - timeout.tv_sec = 0; - timeout.tv_usec = 0; - select(16, &readfds, 0, 0, &timeout); - - return (FD_ISSET(fileno(stdin), &readfds)); -} +/// prefetch() preloads the given address in L1/L2 cache. This is a non +/// blocking function and do not stalls the CPU waiting for data to be +/// loaded from memory, that can be quite slow. +#if defined(NO_PREFETCH) + +void prefetch(char*) {} #else -/* Windows-version */ -#include -#include -int Bioskey() -{ - static int init = 0, - pipe; - static HANDLE inh; - DWORD dw; - /* If we're running under XBoard then we can't use _kbhit() as the input - * commands are sent to us directly over the internal pipe */ - -#if defined(FILE_CNT) - if (stdin->_cnt > 0) - return stdin->_cnt; + +void prefetch(char* addr) { + +#if defined(__INTEL_COMPILER) || defined(__ICL) + // This hack prevents prefetches to be optimized away by + // Intel compiler. Both MSVC and gcc seems not affected. + __asm__ (""); #endif - if (!init) { - init = 1; - inh = GetStdHandle(STD_INPUT_HANDLE); - pipe = !GetConsoleMode(inh, &dw); - if (!pipe) { - SetConsoleMode(inh, dw & ~(ENABLE_MOUSE_INPUT | ENABLE_WINDOW_INPUT)); - FlushConsoleInputBuffer(inh); - } - } - if (pipe) { - if (!PeekNamedPipe(inh, NULL, 0, NULL, &dw, NULL)) - return 1; - return dw; - } else { - GetNumberOfConsoleInputEvents(inh, &dw); - return dw <= 1 ? 0 : dw; - } + + _mm_prefetch(addr, _MM_HINT_T2); + _mm_prefetch(addr+64, _MM_HINT_T2); // 64 bytes ahead } + #endif