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Represent threat weights directly as i8

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LEB128 adds no additional compression and adds extra complexity to the
code currently.

closes https://github.com/official-stockfish/Stockfish/pull/6479

No functional change
This commit is contained in:
sscg13
2025-12-21 15:43:32 +01:00
committed by Disservin
parent b4b01d0ca2
commit 32292d1e62
2 changed files with 9 additions and 27 deletions
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src/evaluate.h
+1 -1
View File
@@ -33,7 +33,7 @@ namespace Eval {
// for the build process (profile-build and fishtest) to work. Do not change the
// name of the macro or the location where this macro is defined, as it is used
// in the Makefile/Fishtest.
#define EvalFileDefaultNameBig "nn-2962dca31855.nnue"
#define EvalFileDefaultNameBig "nn-c288c895ea92.nnue"
#define EvalFileDefaultNameSmall "nn-37f18f62d772.nnue"
namespace NNUE {
src/nnue/nnue_feature_transformer.h
+8 -26
View File
@@ -164,23 +164,13 @@ class FeatureTransformer {
if (UseThreats)
{
auto combinedWeights =
std::make_unique<std::array<WeightType, HalfDimensions * TotalInputDimensions>>();
read_little_endian<ThreatWeightType>(stream, threatWeights.data(),
ThreatInputDimensions * HalfDimensions);
read_leb_128<WeightType>(stream, weights);
auto combinedPsqtWeights =
std::make_unique<std::array<PSQTWeightType, TotalInputDimensions * PSQTBuckets>>();
read_leb_128<WeightType>(stream, *combinedWeights);
std::transform(combinedWeights->begin(),
combinedWeights->begin() + ThreatInputDimensions * HalfDimensions,
std::begin(threatWeights),
[](WeightType w) { return static_cast<ThreatWeightType>(w); });
std::copy(combinedWeights->begin() + ThreatInputDimensions * HalfDimensions,
combinedWeights->begin()
+ (ThreatInputDimensions + InputDimensions) * HalfDimensions,
std::begin(weights));
read_leb_128<PSQTWeightType>(stream, *combinedPsqtWeights);
std::copy(combinedPsqtWeights->begin(),
@@ -219,21 +209,13 @@ class FeatureTransformer {
if (UseThreats)
{
auto combinedWeights =
std::make_unique<std::array<WeightType, HalfDimensions * TotalInputDimensions>>();
write_little_endian<ThreatWeightType>(stream, copy->threatWeights.data(),
ThreatInputDimensions * HalfDimensions);
write_leb_128<WeightType>(stream, copy->weights);
auto combinedPsqtWeights =
std::make_unique<std::array<PSQTWeightType, TotalInputDimensions * PSQTBuckets>>();
std::copy(std::begin(copy->threatWeights),
std::begin(copy->threatWeights) + ThreatInputDimensions * HalfDimensions,
combinedWeights->begin());
std::copy(std::begin(copy->weights),
std::begin(copy->weights) + InputDimensions * HalfDimensions,
combinedWeights->begin() + ThreatInputDimensions * HalfDimensions);
write_leb_128<WeightType>(stream, *combinedWeights);
std::copy(std::begin(copy->threatPsqtWeights),
std::begin(copy->threatPsqtWeights) + ThreatInputDimensions * PSQTBuckets,
combinedPsqtWeights->begin());