anematodeandJoost VandeVondele 0111d11e23 Add ability to disable performance-sensitive relaxed atomic operations at compile time ...

Adds a `RelaxedAtomic`  wrapper around either `T` or `std::atomic<T>` and `USE_SLOPPY_ATOMICS` preprocessor define. The intent of this flag is to allow easy disabling of atomics on WASM, where even relaxed atomics are expensive because all atomics have `seq_cst` semantics.

Passed non regression STC
LLR: 2.99 (-2.94,2.94) <-1.75,0.25>
Total: 50624 W: 12976 L: 12776 D: 24872
Ptnml(0-2): 112, 5445, 14005, 5631, 119
https://tests.stockfishchess.org/tests/view/6a1f690e818cacc1db0ad2c7

Passed non-regression STC SMP
 LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 163696 W: 41514 L: 41438 D: 80744
Ptnml(0-2): 162, 18272, 44904, 18348, 162
https://tests.stockfishchess.org/tests/view/6a21fb97351b79f679cc44b3

Using this class for the TT also allows us to remove the TSAN suppressions, since the UB is fixed.

closes https://github.com/official-stockfish/Stockfish/pull/6877

No functional change

2026-06-09 21:52:29 +02:00

..

.gitattributes

Add .gitattributes for script LE

2025-01-12 21:16:32 +01:00

instrumented.py

Add ability to disable performance-sensitive relaxed atomic operations at compile time

2026-06-09 21:52:29 +02:00

perft.sh

Increase CI timeouts for perft

2025-08-02 15:52:24 +02:00

reprosearch.sh

Fix typos in comments, adjust readme

2021-12-01 18:07:30 +01:00

signature.sh

Add wasm32 and wasm32-relaxed-simd targets, and light optimizations

2026-06-09 19:35:05 +02:00

testing.py

Add ability to disable performance-sensitive relaxed atomic operations at compile time

2026-06-09 21:52:29 +02:00