Skip to content

TT smart save #347

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
mstembera wants to merge 6 commits into from
Closed

TT smart save #347

Changes from all commits
Commits
Show all changes
6 commits
Select commit Hold shift + click to select a range
2a1cc59
Don't overwrite any existing TT data with blanks.
Apr 29, 2015
92b5d79
Take2. Don't overwrite deeper TT data with shallower.
May 1, 2015
c1023f2
Merge branch 'master' into TTSmartSave
May 4, 2015
1e9f2fb
Don't overwrite more valuable TT data w/ less valuable.
May 4, 2015
1776119
Remove unnecessary refresh that never executes because of above g != …
May 7, 2015
86fa1cc
Standard indentation. Pointed out by Lucas.
May 9, 2015
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
33 changes: 25 additions & 8 deletions src/tt.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -43,14 +43,31 @@ struct TTEntry {

void save(Key k, Value v, Bound b, Depth d, Move m, Value ev, uint8_t g) {

if (m || (k >> 48) != key16) // Preserve any existing move for the same position
move16 = (uint16_t)m;

key16 = (uint16_t)(k >> 48);
value16 = (int16_t)v;
eval16 = (int16_t)ev;
genBound8 = (uint8_t)(g | b);
depth8 = (int8_t)d;
if (key16 != (k >> 48))
{
key16 = (uint16_t)(k >> 48);
move16 = (uint16_t)m;
value16 = (int16_t)v;
eval16 = (int16_t)ev;
genBound8 = (uint8_t)(g | b);
depth8 = (int8_t)d;
}
else
{
if (m) // Preserve any existing move for the same position
move16 = (uint16_t)m;

// Don't overwrite more valuable values
if (d+2 > depth8 || g != (genBound8 & 0xFC) || b == BOUND_EXACT)
{
value16 = (int16_t)v;
genBound8 = (uint8_t)(g | b);
depth8 = (int8_t)d;
}

if (ev != VALUE_NONE)
eval16 = (int16_t)ev;
}
}

private:
Expand Down