mirror of
https://github.com/sockspls/badfish
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e0c47a6ceb
In Movepicker c'tor we access during initialization one of MainSearchPhaseIndex..QsearchWithoutChecksPhaseIndex globals. Postpone definition of PhaseTable[] just after them so that when PhaseTable[] will be accessed later in get_next_move() it will be already present in L1/L2. It works like an implicit prefetching of PhaseTable[]. Also shrink PhaseTable[] to fit an L1 cache line of 16 bytes using uint8_t instead of int. This apparentely innocuous patch gives an astonish speed up of 1.6% under MSVC 2010 beta, pgo optimized ! No functional change. Signed-off-by: Marco Costalba <mcostalba@gmail.com>
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
/*
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Stockfish, a UCI chess playing engine derived from Glaurung 2.1
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Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
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Copyright (C) 2008-2009 Marco Costalba
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Stockfish is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Stockfish is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#if !defined(TYPES_H_INCLUDED)
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#define TYPES_H_INCLUDED
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#if !defined(_MSC_VER)
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#include <inttypes.h>
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#else
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typedef __int8 int8_t;
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typedef unsigned __int8 uint8_t;
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typedef __int16 int16;
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typedef unsigned __int16 uint16_t;
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typedef __int32 int32_t;
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typedef unsigned __int32 uint32_t;
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typedef __int64 int64;
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typedef unsigned __int64 uint64_t;
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typedef __int16 int16_t;
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typedef __int64 int64_t;
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#endif // !defined(_MSC_VER)
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// Hash keys
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typedef uint64_t Key;
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// Bitboard type
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typedef uint64_t Bitboard;
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////
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//// Compiler specific defines
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////
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// Quiet a warning on Intel compiler
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#if !defined(__SIZEOF_INT__ )
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#define __SIZEOF_INT__ 0
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#endif
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// Check for 64 bits for different compilers: Intel, MSVC and gcc
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#if defined(__x86_64) || defined(_M_X64) || defined(_WIN64) || (__SIZEOF_INT__ > 4)
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#define IS_64BIT
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#endif
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#if defined(IS_64BIT) && (defined(__GNUC__) || defined(__INTEL_COMPILER))
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#define USE_BSFQ
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#endif
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// Cache line alignment specification
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#if defined(_MSC_VER) || defined(__INTEL_COMPILER)
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#define CACHE_LINE_ALIGNMENT __declspec(align(64))
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#else
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#define CACHE_LINE_ALIGNMENT __attribute__ ((aligned(64)))
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#endif
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#endif // !defined(TYPES_H_INCLUDED)
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