- void save(uint32_t k, Value v, Bound b, Depth d, Move m, int g, Value ev, Value em) {
-
- key32 = (uint32_t)k;
- move16 = (uint16_t)m;
- bound8 = (uint8_t)b;
- generation8 = (uint8_t)g;
- value16 = (int16_t)v;
- depth16 = (int16_t)d;
- evalValue = (int16_t)ev;
- evalMargin = (int16_t)em;
+ Move move() const { return (Move )move16; }
+ Value value() const { return (Value)value16; }
+ Value eval() const { return (Value)eval16; }
+ Depth depth() const { return (Depth)depth8; }
+ Bound bound() const { return (Bound)(genBound8 & 0x3); }
+
+ void save(Key k, Value v, Bound b, Depth d, Move m, Value ev, uint8_t g) {
+
+ // Preserve any existing move for the same position
+ if (m || (k >> 48) != key16)
+ move16 = (uint16_t)m;
+
+ // Don't overwrite more valuable entries
+ if ( (k >> 48) != key16
+ || d > depth8 - 2
+ || g != (genBound8 & 0xFC)
+ || b == BOUND_EXACT)
+ {
+ key16 = (uint16_t)(k >> 48);
+ value16 = (int16_t)v;
+ eval16 = (int16_t)ev;
+ genBound8 = (uint8_t)(g | b);
+ depth8 = (int8_t)d;
+ }