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introduce bitloops

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mike
2026-01-10 09:32:46 +01:00
parent d8f51e9136
commit 948ba91467
1 changed files with 43 additions and 63 deletions
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106
src/main/java/puzzle/SwedishGenerator.java
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@@ -395,76 +395,49 @@ public record SwedishGenerator(Rng rng) {
long maskFitness(Grid grid) {
var clueCount = grid.clueCount();
long penalty = ((long) Math.abs(clueCount - TARGET_CLUES)) << 3;
var ctx = CTX.get();
var covH = ctx.covH;
var covV = ctx.covV;
Arrays.fill(covH, 0, SIZE, 0);
Arrays.fill(covV, 0, SIZE, 0);
boolean hasSlots = false;
long lo_cl = grid.bo[0], hi_cl = grid.bo[1];
while (lo_cl != 0L) {
int clueIdx = Long.numberOfTrailingZeros(lo_cl);
lo_cl &= (lo_cl - 1);
var d = grid.digitAt(clueIdx);
var nbrs16 = OFFSETS[d];
long packed = nbrs16.path()[clueIdx];
int n = (int) (packed >>> 56), k, idx;
var horiz = Slot.horiz(d) ? covH : covV;
for (k = 0; k < n && k < MAX_WORD_LENGTH; k++) {
idx = (int) ((packed >>> (k * 7)) & 0x7F);
if (grid.isClue(idx)) break;
horiz[idx] += 1;
}
if (k == 0) continue;
hasSlots = true;
if (k < MIN_LEN) penalty += 8000;
}
while (hi_cl != 0L) {
int clueIdx = 64 + Long.numberOfTrailingZeros(hi_cl);
hi_cl &= (hi_cl - 1);
var d = grid.digitAt(clueIdx);
var nbrs16 = OFFSETS[d];
long packed = nbrs16.path()[clueIdx];
int n = (int) (packed >>> 56), k, idx;
var horiz = Slot.horiz(d) ? covH : covV;
for (k = 0; k < n && k < MAX_WORD_LENGTH; k++) {
idx = (int) ((packed >>> (k * 7)) & 0x7F);
if (grid.isClue(idx)) break;
horiz[idx] += 1;
}
if (k == 0) continue;
hasSlots = true;
if (k < MIN_LEN) penalty += 8000;
}
if (!hasSlots) return 1_000_000_000L;
long lo_cl = grid.bo[0], hi_cl = grid.bo[1];
// clue clustering (8-connected)
var seen = ctx.seen;
seen.clear();
var seen = ctx.seen;
var stack = ctx.stack;
class Mask {
long penalty;
Mask(long pen) { this.penalty = pen; }
long penalty = (((long) Math.abs(grid.clueCount() - TARGET_CLUES)) << 3);
boolean hasSlots = false;
void space(int clueIdx) {
var d = grid.digitAt(clueIdx);
var nbrs16 = OFFSETS[d];
long packed = nbrs16.path()[clueIdx];
int n = (int) (packed >>> 56), k, idx;
var horiz = Slot.horiz(d) ? covH : covV;
for (k = 0; k < n && k < MAX_WORD_LENGTH; k++) {
idx = (int) ((packed >>> (k * 7)) & 0x7F);
if (grid.isClue(idx)) break;
horiz[idx] += 1;
}
if (k == 0) return;
hasSlots = true;
if (k < MIN_LEN) penalty += 8000;
}
void clueStackPenalty(int clueIdx) {
if (seen.get(clueIdx)) ;
var sp = 0;
stack[sp++] = clueIdx;
if (seen.get(clueIdx)) return;
int size = 0;
long packed;
stack[0] = clueIdx;
seen.set(clueIdx);
var size = 0;
while (sp > 0) {
var p = stack[--sp];
size++;
long packed = Neighbors9x8.NBR8_PACKED[p];
int n = (int) (packed >>> 56);
for (int k = 0; k < n; k++) {
int nidx = (int) ((packed >>> (k * 7)) & 0x7F);
for (int sp = 1, n, nidx, k; sp > 0; size++) {
packed = Neighbors9x8.NBR8_PACKED[stack[--sp]];
n = (int) (packed >>> 56);
for (k = 0; k < n; k++) {
nidx = (int) ((packed >>> (k * 7)) & 0x7F);
if (seen.get(nidx) || grid.notClue(nidx)) continue;
seen.set(nidx);
stack[sp++] = nidx;
@@ -473,7 +446,7 @@ public record SwedishGenerator(Rng rng) {
if (size >= 2) this.penalty += ((size - 1L) * 120L);
}
void wall(rci rci) {
if ((4 - rci.nbrCount()) + Long.bitCount(rci.n1() & grid.bo[0]) + Long.bitCount(rci.n2() & grid.bo[1]) >= 3) this.penalty += 400;
if ((4 - rci.nbrCount()) + Long.bitCount(rci.n1() & lo_cl) + Long.bitCount(rci.n2() & hi_cl) >= 3) this.penalty += 400;
var h = covH[rci.i()];
var v = covV[rci.i()];
if (h == 0 && v == 0) this.penalty += 1500;
@@ -482,12 +455,19 @@ public record SwedishGenerator(Rng rng) {
}
}
val mask = new Mask(penalty);
for (var lo = grid.bo[0]; lo != 0; lo &= lo - 1) mask.clueStackPenalty(Long.numberOfTrailingZeros(lo));
for (var hi = grid.bo[1]; hi != 0; hi &= hi - 1) mask.clueStackPenalty(64 + Long.numberOfTrailingZeros(hi));
val space = new Mask();
for (var lo = lo_cl; lo != 0L; lo &= lo - 1) space.space(Long.numberOfTrailingZeros(lo));
for (var hi = hi_cl; hi != 0L; hi &= hi - 1) space.space(64 + Long.numberOfTrailingZeros(hi));
if (!space.hasSlots) return 1_000_000_000L;
seen.clear();
for (var lo = lo_cl; lo != 0L; lo &= lo - 1) space.clueStackPenalty(Long.numberOfTrailingZeros(lo));
for (var hi = hi_cl; hi != 0L; hi &= hi - 1) space.clueStackPenalty(64 + Long.numberOfTrailingZeros(hi));
for (var lo = ~lo_cl; lo != 0L; lo &= lo - 1) space.wall(IT[Long.numberOfTrailingZeros(lo)]);
for (var hi = ~hi_cl & 0xFFL; hi != 0L; hi &= hi - 1) space.wall(IT[64 + Long.numberOfTrailingZeros(hi)]);
//for (var rci : IT) if (grid.notClue(rci.i())) space.wall(rci);
// dead-end-ish letter cell (3+ walls)
int walls, wc, wr;
// int walls, wc, wr;
/* for (var rci : IT) {
if (grid.isDigitAt(rci.i())) continue;
walls = 0;
@@ -498,8 +478,8 @@ public record SwedishGenerator(Rng rng) {
}
if (walls >= 3) penalty[0] += 400;
}*/
for (var rci : IT) if (grid.notClue(rci.i())) mask.wall(rci);
return mask.penalty;
return space.penalty;
}
Grid randomMask() {