jirayu_sri/stockfish
1
0
Fork 0
mirror of https://github.com/official-stockfish/Stockfish.git synced 2026-07-23 05:07:14 +00:00
Code Issues Packages Projects Releases Wiki Activity

Speedup splat_moves on avx512icl

Browse Source 
STC
```
LLR: 5.45 (-2.94,2.94) <0.00,2.00>
Total: 612192 W: 158602 L: 157260 D: 296330
Ptnml(0-2): 1634, 67783, 166027, 68911, 1741
```

@Torom measured:
```
sf_base =  2380902 +/-   1016 (95%)
sf_test =  2391426 +/-   1065 (95%)
diff    =    10524 +/-   1336 (95%)
speedup = 0.44203% +/- 0.056% (95%)
```

I've verified that `_mm512_slli_epi16(v, 0)` gets optimized out in GCC
9+ and clang 4+. Added constants to types.h so that people messing
around with the layout of `Move` don't have to know about this part of
the code.

closes https://github.com/official-stockfish/Stockfish/pull/6670

No functional change
This commit is contained in:
anematode
2026-03-18 20:49:20 +01:00
committed by Disservin
parent add173263d
commit d173a0655d
3 changed files with 27 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/search.cpp
+3 -2
View File
@@ -1495,8 +1495,9 @@ moves_loop: // When in check, search starts here
if (!ss->inCheck && !(bestMove && pos.capture(bestMove))
&& (bestValue > ss->staticEval) == bool(bestMove))
{
auto bonus = std::clamp(int(bestValue - ss->staticEval) * depth * (bestMove ? 12 : 17) / 128,
-CORRECTION_HISTORY_LIMIT / 4, CORRECTION_HISTORY_LIMIT / 4);
auto bonus =
std::clamp(int(bestValue - ss->staticEval) * depth * (bestMove ? 12 : 17) / 128,
-CORRECTION_HISTORY_LIMIT / 4, CORRECTION_HISTORY_LIMIT / 4);
update_correction_history(pos, ss, *this, 1069 * bonus / 1024);
}