Moved the nnue folder.

src/nnue/layers/input_slice.h

@@ -0,0 +1,74 @@
+// NNUE evaluation function layer InputSlice definition
+
+#ifndef _NNUE_LAYERS_INPUT_SLICE_H_
+#define _NNUE_LAYERS_INPUT_SLICE_H_
+
+#if defined(EVAL_NNUE)
+
+#include "../nnue_common.h"
+
+namespace Eval {
+
+namespace NNUE {
+
+namespace Layers {
+
+// input layer
+template <IndexType OutputDimensions, IndexType Offset = 0>
+class InputSlice {
+ public:
+  // need to maintain alignment
+  static_assert(Offset % kMaxSimdWidth == 0, "");
+
+  // output type
+  using OutputType = TransformedFeatureType;
+
+  // output dimensionality
+  static constexpr IndexType kOutputDimensions = OutputDimensions;
+
+  // Size of the forward propagation buffer used from the input layer to this layer
+  static constexpr std::size_t kBufferSize = 0;
+
+  // Hash value embedded in the evaluation function file
+  static constexpr std::uint32_t GetHashValue() {
+    std::uint32_t hash_value = 0xEC42E90Du;
+    hash_value ^= kOutputDimensions ^ (Offset << 10);
+    return hash_value;
+  }
+
+  // A string that represents the structure from the input layer to this layer
+  static std::string GetStructureString() {
+    return "InputSlice[" + std::to_string(kOutputDimensions) + "(" +
+        std::to_string(Offset) + ":" +
+        std::to_string(Offset + kOutputDimensions) + ")]";
+  }
+
+  // read parameters
+  bool ReadParameters(std::istream& /*stream*/) {
+    return true;
+  }
+
+  // write parameters
+  bool WriteParameters(std::ostream& /*stream*/) const {
+    return true;
+  }
+
+  // forward propagation
+  const OutputType* Propagate(
+      const TransformedFeatureType* transformed_features,
+      char* /*buffer*/) const {
+    return transformed_features + Offset;
+  }
+
+ private:
+};
+
+}  // namespace Layers
+
+}  // namespace NNUE
+
+}  // namespace Eval
+
+#endif  // defined(EVAL_NNUE)
+
+#endif