void update(Value v, Bound b, Depth d, Move m, int g) {
move16 = (uint16_t)m;
- bound |= (uint8_t)b;
generation8 = (uint8_t)g;
+ if (bound == BOUND_EXACT)
+ bound = BOUND_UPPER | BOUND_LOWER; // Drop 'EXACT' flag
+
if (b & BOUND_UPPER)
{
valueUpper = (int16_t)v;
depthUpper = (int16_t)d;
+
+ if ((bound & BOUND_LOWER) && v < valueLower)
+ {
+ bound ^= BOUND_LOWER;
+ valueLower = VALUE_NONE;
+ depthLower = DEPTH_NONE;
+ }
}
if (b & BOUND_LOWER)
{
valueLower = (int16_t)v;
depthLower = (int16_t)d;
+
+ if ((bound & BOUND_UPPER) && v > valueUpper)
+ {
+ bound ^= BOUND_UPPER;
+ valueUpper = VALUE_NONE;
+ depthUpper = DEPTH_NONE;
+ }
}
+
+ bound |= (uint8_t)b;
}
void set_generation(int g) { generation8 = (uint8_t)g; }