stellar

commit 2d0ab1b27672f89ac0096924217704544c4a8901
parent 9ee804501d5cd5fd02da68ec89e975d29876e389
Author: Dimitrije Dobrota <mail@dimitrijedobrota.com>
Date:   Mon, 11 Mar 2024 14:10:24 +0000

User bit header for standard functions

Diffstat:
M
CMakeLists.txt
 | 
2
+-
M
src/utils/bit.hpp
 | 
23
+++--------------------

2 files changed, 4 insertions(+), 21 deletions(-)
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -3,7 +3,7 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 project(
     Stellar
-	VERSION 1.2.1
+	VERSION 1.2.2
     DESCRIPTION "Chess engine written in C++"
 	HOMEPAGE_URL https://git.dimitrijedobrota.com/stellar.git
     LANGUAGES CXX
diff --git a/src/utils/bit.hpp b/src/utils/bit.hpp
@@ -2,6 +2,7 @@
 #define STELLAR_BIT_H
 
 #include "utils.hpp"
+#include <bit>
 
 namespace bit {
 
@@ -9,26 +10,8 @@ inline constexpr bool get(const U64 &bitboard, uint8_t square) { return (bitboar
 inline constexpr void set(U64 &bitboard, uint8_t square) { bitboard |= (C64(1) << square); }
 inline constexpr void pop(U64 &bitboard, uint8_t square) { bitboard &= ~(C64(1) << (square)); }
 
-inline constexpr uint8_t count(U64 bitboard) {
-#if __has_builtin(__builtin_popcountll)
-    return __builtin_popcountll(bitboard);
-#else
-    int count = 0;
-    for (; bitboard > 0; bitboard &= bitboard - 1)
-        count++;
-    return count;
-#endif
-}
-
-inline constexpr uint8_t lsb_index(U64 bitboard) {
-#if __has_builtin(__builtin_ffsll)
-    return __builtin_ffsll(bitboard) - 1;
-#else
-    if (!bitboard) return -1;
-    return bit_count((bitboard & -bitboard) - 1);
-#endif
-}
-
+inline constexpr uint8_t count(U64 bitboard) { return std::popcount(bitboard); }
+inline constexpr uint8_t lsb_index(U64 bitboard) { return std::countr_zero(bitboard); }
 inline constexpr U64 &lsb_pop(U64 &bitboard) { return bitboard &= bitboard & (bitboard - 1); }
 
 #define bitboard_for_each_bit(var, bb)                                                                       \