X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fbitcount.h;h=72ee37ca98dc997cf6fd9ed46696752a637c1b1e;hp=940dbaf52af207c8a24977e8780b42679e36650c;hb=8307da0de77c9c7bbf7c56a7d9c8a688ff4dfb4e;hpb=04001f776edd312418ad8334f4287b4d1dba5f7b diff --git a/src/bitcount.h b/src/bitcount.h index 940dbaf5..72ee37ca 100644 --- a/src/bitcount.h +++ b/src/bitcount.h @@ -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) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad + Copyright (C) 2008-2012 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 @@ -18,7 +18,6 @@ along with this program. If not, see . */ - #if !defined(BITCOUNT_H_INCLUDED) #define BITCOUNT_H_INCLUDED @@ -96,32 +95,4 @@ inline int count_1s(Bitboard b) { #endif } - -/// cpu_has_popcnt() detects support for popcnt instruction at runtime -inline bool cpu_has_popcnt() { - - int CPUInfo[4] = {-1}; - __cpuid(CPUInfo, 0x00000001); - return (CPUInfo[2] >> 23) & 1; -} - - -/// CpuHasPOPCNT is a global constant initialized at startup that -/// is set to true if CPU on which application runs supports popcnt -/// hardware instruction. Unless USE_POPCNT is not defined. -#if defined(USE_POPCNT) -const bool CpuHasPOPCNT = cpu_has_popcnt(); -#else -const bool CpuHasPOPCNT = false; -#endif - - -/// CpuIs64Bit is a global constant initialized at compile time that -/// is set to true if CPU on which application runs is a 64 bits. -#if defined(IS_64BIT) -const bool CpuIs64Bit = true; -#else -const bool CpuIs64Bit = false; -#endif - #endif // !defined(BITCOUNT_H_INCLUDED)