Changed rotate180 to flip_rank.

nodchip · Aug 30, 2020 · 2ca7baf · 2ca7baf
1 parent 2101969
commit 2ca7baf
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Showing 5 changed files with 9 additions and 9 deletions.
diff --git a/src/nnue/features/enpassant.cpp b/src/nnue/features/enpassant.cpp
@@ -23,7 +23,7 @@ namespace Eval {
  }
 
  if (perspective == BLACK) {
- epSquare = rotate180(epSquare);
+ epSquare = flip_rank(epSquare);
  }
 
  auto file = file_of(epSquare);

diff --git a/src/nnue/features/half_kp.cpp b/src/nnue/features/half_kp.cpp
@@ -23,9 +23,9 @@
 
 namespace Eval::NNUE::Features {
 
- // Orient a square according to perspective (rotates by 180 for black)
+ // Orient a square according to perspective (flip rank for black)
  inline Square orient(Color perspective, Square s) {
- return Square(int(s) ^ (bool(perspective) * 63));
+ return Square(int(s) ^ (bool(perspective) * SQ_A8));
  }
 
  // Find the index of the feature quantity from the king position and PieceSquare

diff --git a/src/nnue/features/half_relative_kp.cpp b/src/nnue/features/half_relative_kp.cpp
@@ -11,9 +11,9 @@ namespace NNUE {
 
 namespace Features {
 
-// Orient a square according to perspective (rotates by 180 for black)
+// Orient a square according to perspective (flip rank for black)
 inline Square orient(Color perspective, Square s) {
- return Square(int(s) ^ (bool(perspective) * 63));
+ return Square(int(s) ^ (bool(perspective) * SQ_A8));
 }
 
 // Find the index of the feature quantity from the ball position and PieceSquare

diff --git a/src/nnue/features/k.cpp b/src/nnue/features/k.cpp
@@ -11,9 +11,9 @@ namespace NNUE {
 
 namespace Features {
 
-// Orient a square according to perspective (rotates by 180 for black)
+// Orient a square according to perspective (flip rank for black)
 inline Square orient(Color perspective, Square s) {
- return Square(int(s) ^ (bool(perspective) * 63));
+ return Square(int(s) ^ (bool(perspective) * SQ_A8));
 }
 
 // Index of a feature for a given king position.

diff --git a/src/nnue/features/p.cpp b/src/nnue/features/p.cpp
@@ -11,9 +11,9 @@ namespace NNUE {
 
 namespace Features {
 
-// Orient a square according to perspective (rotates by 180 for black)
+// Orient a square according to perspective (flip rank for black)
 inline Square orient(Color perspective, Square s) {
- return Square(int(s) ^ (bool(perspective) * 63));
+ return Square(int(s) ^ (bool(perspective) * SQ_A8));
 }
 
 // Find the index of the feature quantity from the king position and PieceSquare