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Convert TT depth to int8_t

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Now that half plies have been removed from the engine, we can encode
TT depth into an int8_t.

Range is -128 to +127, so it goes still further than the previous
limit of 121 plies (with ONE_PLY == 2 where depth - DEPTH_NONE was
encoded as an uint8_t).

No functional change.

Resolved #60
This commit is contained in:
lucasart
2014-10-01 20:51:32 +01:00
committed by Joona Kiiski
parent a1b62d68ec
commit e60cdca9b0
1 changed files with 3 additions and 3 deletions
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6
src/tt.h
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@@ -38,7 +38,7 @@ struct TTEntry {
Move move() const { return (Move )move16; } Move move() const { return (Move )move16; }
Value value() const { return (Value)value16; } Value value() const { return (Value)value16; }
Value eval_value() const { return (Value)evalValue; } Value eval_value() const { return (Value)evalValue; }
Depth depth() const { return (Depth)(depth8) + DEPTH_NONE; } Depth depth() const { return (Depth)depth8; }
Bound bound() const { return (Bound)(genBound8 & 0x3); } Bound bound() const { return (Bound)(genBound8 & 0x3); }
private: private:
@@ -51,7 +51,7 @@ private:
value16 = (int16_t)v; value16 = (int16_t)v;
evalValue = (int16_t)ev; evalValue = (int16_t)ev;
genBound8 = (uint8_t)(g | b); genBound8 = (uint8_t)(g | b);
depth8 = (uint8_t)(d - DEPTH_NONE); depth8 = (int8_t)d;
} }
uint16_t key16; uint16_t key16;
@@ -59,7 +59,7 @@ private:
int16_t value16; int16_t value16;
int16_t evalValue; int16_t evalValue;
uint8_t genBound8; uint8_t genBound8;
uint8_t depth8; int8_t depth8;
}; };
/// TTCluster is a 32 bytes cluster of TT entries consisting of: /// TTCluster is a 32 bytes cluster of TT entries consisting of: