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introduce bitloops

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mike
2026-01-12 23:25:59 +01:00
parent a9b4dfb422
commit 61d246e551
3 changed files with 65 additions and 60 deletions
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9
src/main/java/puzzle/SwedishGenerator.java
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@@ -61,10 +61,15 @@ public record SwedishGenerator(Rng rng) {
static int clamp(int x, int a, int b) { return Math.max(a, Math.min(b, x)); }
record Pick(Slot slot, CandidateInfo info, boolean done) { }
// 0b11
//0b00
// 0b01
// 0b10
static final byte B0 = (byte) 0;
static final byte B64 = (byte) 64;
static final long[] OFFSETS_D_IDX = Neighbors9x8.OFFSET_D_IDX;
static final long[] OFFSET_D_IDX_0_BASE = Neighbors9x8.OFFSET_D_IDX_0_BASE;
static final rci[] IT = Neighbors9x8.IT;
static final int[][] MUTATE_RI = new int[SIZE][625];
static final long[] NBR8_PACKED_LO = Neighbors9x8.NBR8_PACKED_LO;
@@ -317,11 +322,11 @@ public record SwedishGenerator(Rng rng) {
public static int clueIndex(int key) { return key >>> BIT_FOR_DIR; }
public static int dir(int key) { return key & 7; }
public boolean horiz() { return horiz(key); }
public boolean reversed() { return (key & 2) == 0; }
public boolean increasing() { return (key & 2) != 0; }
public static boolean increasing(int dir) { return (dir & 2) != 0; }
public IntStream walk() { return Gridded.walk((byte) key, lo, hi); }
public static boolean horiz(int d) { return (d & 1) == 0; }
public static boolean horizv2(int d) { return (d & 1) == 1; }
public static int packSlotDir(int idx, int d) { return (idx << BIT_FOR_DIR) | d; }
}
@@ -410,7 +415,7 @@ public record SwedishGenerator(Rng rng) {
}
if ((rLo | rHi) != 0) {
hasSlots = true;
if (Slot.horiz(d + 1)) covH.or(rLo, rHi);
if (Slot.horizv2(d)) covH.or(rLo, rHi);
else covV.or(rLo, rHi);
if ((Long.bitCount(rLo) + Long.bitCount(rHi)) < MIN_LEN) penalty += 8000;
} else {

6
src/test/java/puzzle/MainTest.java
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@@ -56,9 +56,9 @@ public class MainTest {
void testStaticSlotMethods() {
// Test static horiz
// dir 2 (right) is horizontal
assertTrue(Slot.horiz(2));
assertTrue(Slot.horizv2(1));
// dir 3 (down) is vertical
assertFalse(Slot.horiz(3));
assertFalse(Slot.horizv2(2));
}
@Test
@@ -78,7 +78,7 @@ public class MainTest {
@Test
public void testHoriz() {
assertTrue(Slot.from(2, 0L, 0L).horiz());
assertTrue(Slot.from(4, 0L, 0L).horiz());
assertTrue(Slot.from(0, 0L, 0L).horiz());
assertFalse(Slot.from(1, 0L, 0L).horiz());
assertFalse(Slot.from(3, 0L, 0L).horiz());
}

4
src/test/java/puzzle/SwedishGeneratorTest.java
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@@ -180,8 +180,8 @@ public class SwedishGeneratorTest {
assertEquals(5, Grid.c(cells[1]));
assertEquals(5, Grid.c(cells[2]));
assertTrue(Slot.horiz(CLUE_RIGHT + 1)); // right
assertFalse(Slot.horiz(CLUE_DOWN + 1)); // down
assertTrue(Slot.horizv2(CLUE_RIGHT)); // right
assertFalse(Slot.horizv2(CLUE_DOWN)); // down
}
static int intersectSorted(int[] a, int aLen, int[] b, int bLen, int[] out) {
if (aLen == 0 || bLen == 0) return 0;