diff options
| author | Scott Gasch <[email protected]> | 2026-09-04 16:46:27 -0700 |
|---|---|---|
| committer | Scott Gasch <[email protected]> | 2026-09-04 16:46:27 -0700 |
| commit | 92fc41226f784b251f41eab7e75c13075e980a54 (patch) | |
| tree | 201d61c44dea1925b30c1d78ce2a3ac9d98e688e /src/GNUmakefile | |
| parent | 550ea81a5a2ee2561c3feb91dc55686f4d3cb872 (diff) | |
Land bitboard move generation (Part A+B) and movesup.c bitboard queries; default on
Implements the full board_representation/MOVEGEN_MIGRATION.md scope:
bitboard-backed generators for all six not-in-check piece types plus
the JumpTable-avoiding whole-node dispatch fork (_GenerateAllMovesBB),
the in-check escape path (king flight + block/capture), and
movesup.c's ExposesCheck/FasterExposesCheck/ExposesCheckEp/IsAttacked/
InCheck bitboard equivalents. Nine toggles total
(GENERATE_{KNIGHT,KING,ROOK,BISHOP,QUEEN,PAWN}_BITBOARD,
GENERATE_ESCAPES_{KING,BLOCK}_BITBOARD, EXPOSESCHECK_BITBOARD,
ISATTACKED_BITBOARD), all now on by default in GNUmakefile --
DISABLE_BITBOARD_MOVEGEN=1 opts back into the mailbox path, which
remains fully present and compiled either way.
Correctness verified via perft (Kiwipete, Position 4), the move-set
comparison harness across 20,000 random positions, all nine toggles
combined cleanly (15/15 runs, after fixing a GenerateRandomLegalPosition
en-passant-sentinel bug in the test harness), and sd10 on all three
curated suites showing zero solve-count regression vs head_reference
(the ecm_hard_quick delta traced to unrelated intervening commits).
Speed: most individual generators land near parity by design (mailbox's
per-square walk was already close to O(destination count)); the real,
consistent wins are the dispatch-layer fork (up to 23% in dense
positions) and IsAttackedBB (0.73x-0.93x of mailbox).
Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01AbHkVrm5KUyzLwWd3GHmo6
Diffstat (limited to 'src/GNUmakefile')
| -rw-r--r-- | src/GNUmakefile | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/GNUmakefile b/src/GNUmakefile index 601a362..ab35c7e 100644 --- a/src/GNUmakefile +++ b/src/GNUmakefile @@ -17,6 +17,15 @@ # GETATTACKS_BITBOARD=1: use the bbPieces/bbPawns-backed _GetAttacksBB # instead of the asm/CROUTINES GetAttacks -- see # board_representation/MIGRATION.md section 6 +# DISABLE_BITBOARD_MOVEGEN=1: opt back into the mailbox move +# generator/escapes/ExposesCheck/IsAttacked implementations -- the +# nine GENERATE_*_BITBOARD/EXPOSESCHECK_BITBOARD/ISATTACKED_BITBOARD +# toggles (board_representation/MOVEGEN_MIGRATION.md) are on by +# default as of the 2026-09-04 correctness/no-regression sweep +# (perft, move-set comparison harness, sd10 curated-suite parity, +# match_play.py). The mailbox code is still fully present and +# compiled either way -- this flag only flips which side of each +# macro-swap wins, it doesn't remove anything. # EVERYTHING=1: everything everything everything everything # # $Id$ @@ -103,6 +112,14 @@ ifdef GETATTACKS_BITBOARD PROFILE += -DGETATTACKS_BITBOARD endif +ifndef DISABLE_BITBOARD_MOVEGEN + PROFILE += -DGENERATE_KNIGHT_BITBOARD -DGENERATE_KING_BITBOARD \ + -DGENERATE_ROOK_BITBOARD -DGENERATE_BISHOP_BITBOARD \ + -DGENERATE_QUEEN_BITBOARD -DGENERATE_PAWN_BITBOARD \ + -DGENERATE_ESCAPES_KING_BITBOARD -DGENERATE_ESCAPES_BLOCK_BITBOARD \ + -DEXPOSESCHECK_BITBOARD -DISATTACKED_BITBOARD +endif + ifdef EVERYTHING PROFILE += -DEVAL_DUMP -DEVAL_TIME -DPERF_COUNTERS -DMP -DSMP -DTEST_NULL -DDUMP_TREE -fbounds-checking else |