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introduce bitloops

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mike
2026-01-12 08:28:48 +01:00
parent f8f1a67a61
commit 9c1be77d76
2 changed files with 22 additions and 22 deletions
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22
src/main/java/puzzle/SwedishGenerator.java
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@@ -72,10 +72,8 @@ public record SwedishGenerator(Rng rng) {
static final byte B64 = (byte) 64;
static final byte B48 = (byte) 48;
// Directions for '1'..'6'
static final nbrs_16[] OFFSETS = Neighbors9x8.OFFSETS;
static final long[] OFFSETS_D_IDX = Neighbors9x8.OFFSET_D_IDX;
static final nbrs_16[] OFFSETS_FOUR = Neighbors9x8.OFFSETS_FOUR;
static final nbrs_8[] nbrs8 = Neighbors9x8.nbrs8;
static final nbrs_8[] nbrs4 = Neighbors9x8.nbrs4;
static final rci[] IT = Neighbors9x8.IT;
static final long[] INBR8_PACKEDT = Neighbors9x8.NBR8_PACKED;
static final int[][] MUTATE_RI = new int[SIZE][625];
@@ -175,7 +173,7 @@ public record SwedishGenerator(Rng rng) {
this.hi = hi;
}
static Grid createEmpty() { return new Grid(new byte[SIZE], X, X); }
int digitAt(int index) { return g[index] & ~48; }
int digitAt(int index) { return g[index] & 7; }
public static int r(int offset) { return offset & 7; }
public static int c(int offset) { return offset >>> 3; }
static int offset(int r, int c) { return r | (c << 3); }
@@ -266,7 +264,7 @@ public record SwedishGenerator(Rng rng) {
int intAt(int idx) { return (int) (((word >>> (idx * 5))) & 0b11111); }// word[]; }
@Override public int hashCode() { return unpackIndex(word); }
@Override public boolean equals(Object o) { return (o == this) || (o instanceof Lemma l && l.word == word); }
static String[] clue(long w) { return CsvIndexService.clues(unpackIndex(w)); }
static String[] clue(long w) { return CsvIndexService.clues(unpackIndex(w)); }
static int simpel(long w) { return CsvIndexService.simpel(unpackIndex(w)); }
int length() { return Lemma.length(word); }
static int length(long word) {
@@ -344,7 +342,6 @@ public record SwedishGenerator(Rng rng) {
}
}
static record Slot(int key, long packedPos) {
static final int BIT_FOR_DIR = 3;
@@ -364,7 +361,7 @@ public record SwedishGenerator(Rng rng) {
private static void processSlot(Grid grid, SlotVisitor visitor, int idx) {
var d = grid.digitAt(idx);
var packed = OFFSETS[d].path()[idx];
var packed = OFFSETS_D_IDX[(d - 1) | (idx << 2)];
long packedPos = 0L;
int k = 0;
for (long n = (packed >>> 56), offset = 0L, iidx; k < n; k++, offset += 7L) {
@@ -399,10 +396,11 @@ public record SwedishGenerator(Rng rng) {
for (long bits = (i == 0 ? lo_cl : hi_cl); bits != X; bits &= bits - 1) {
int clueIdx = i | Long.numberOfTrailingZeros(bits);
var d = grid.digitAt(clueIdx);
var nbrs16 = OFFSETS[d];
long packed = nbrs16.path()[clueIdx];
int n = (int) (packed >>> 56) * 7, k, idx;
var horiz = Slot.horiz(d) ? covH : covV;
long packed = OFFSETS_D_IDX[(d - 1) | (clueIdx << 2)];
//if (OFFSETS_D_IDX[(d-1) * SIZE + clueIdx] != packed) throw new IllegalStateException("Invalid path index for digit " + d + " at clue " + clueIdx);
int n = (int) (packed >>> 56) * 7, k, idx;
var horiz = Slot.horiz(d) ? covH : covV;
for (k = 0; k < n; k += 7) {
idx = (int) ((packed >>> (k)) & 0x7F);
if (grid.isClue(idx)) break;
@@ -554,7 +552,7 @@ public record SwedishGenerator(Rng rng) {
for (var hi = out.hi; hi != X; hi &= hi - 1L) clearClues(out, 64 + Long.numberOfTrailingZeros(hi));
return out;
}
public static void clearClues(Grid out, int idx) { if (!out.hasRoomForClue(OFFSETS[out.digitAt(idx)].path()[idx])) out.clearClue(idx); }
public static void clearClues(Grid out, int idx) { if (!out.hasRoomForClue(OFFSETS_D_IDX[(out.digitAt(idx) - 1) | (idx << 2)])) out.clearClue(idx); }
Grid hillclimb(Grid start, int limit) {
var best = start;