mirror of
https://github.com/PaperMC/Paper.git
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da9d110d5b
This patch does not appear to be doing anything useful, and may hide errors. Currently, the save logic does not run through this path either so it did not do anything. Additionally, properly implement support for handling RegionFileSizeException in Moonrise.
215 lines
11 KiB
Diff
215 lines
11 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Thu, 4 Jun 2020 02:24:49 -0400
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Subject: [PATCH] Optimize Bit Operations by inlining
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Inline bit operations and reduce instruction count to make these hot
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operations faster
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Feature patch
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diff --git a/src/main/java/net/minecraft/core/BlockPos.java b/src/main/java/net/minecraft/core/BlockPos.java
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index a1d54d978d34d75475f92dfb806113586e7e449c..f58a94efafbc01d402cd03a108bb90f60930a316 100644
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--- a/src/main/java/net/minecraft/core/BlockPos.java
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+++ b/src/main/java/net/minecraft/core/BlockPos.java
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@@ -50,15 +50,17 @@ public class BlockPos extends Vec3i {
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};
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private static final Logger LOGGER = LogUtils.getLogger();
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public static final BlockPos ZERO = new BlockPos(0, 0, 0);
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- public static final int PACKED_HORIZONTAL_LENGTH = 1 + Mth.log2(Mth.smallestEncompassingPowerOfTwo(30000000));
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- public static final int PACKED_Y_LENGTH = 64 - 2 * PACKED_HORIZONTAL_LENGTH;
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- private static final long PACKED_X_MASK = (1L << PACKED_HORIZONTAL_LENGTH) - 1L;
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- private static final long PACKED_Y_MASK = (1L << PACKED_Y_LENGTH) - 1L;
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- private static final long PACKED_Z_MASK = (1L << PACKED_HORIZONTAL_LENGTH) - 1L;
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+ // Paper start - Optimize Bit Operations by inlining
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+ public static final int PACKED_HORIZONTAL_LENGTH = 26;
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+ public static final int PACKED_Y_LENGTH = 12;
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+ private static final long PACKED_X_MASK = 67108863;
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+ private static final long PACKED_Y_MASK = 4095;
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+ private static final long PACKED_Z_MASK = 67108863;
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private static final int Y_OFFSET = 0;
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- private static final int Z_OFFSET = PACKED_Y_LENGTH;
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- private static final int X_OFFSET = PACKED_Y_LENGTH + PACKED_HORIZONTAL_LENGTH;
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- public static final int MAX_HORIZONTAL_COORDINATE = (1 << PACKED_HORIZONTAL_LENGTH) / 2 - 1;
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+ private static final int Z_OFFSET = 12;
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+ private static final int X_OFFSET = 38;
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+ public static final int MAX_HORIZONTAL_COORDINATE = 33554431;
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+ // Paper end - Optimize Bit Operations by inlining
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public BlockPos(int x, int y, int z) {
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super(x, y, z);
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@@ -68,28 +70,29 @@ public class BlockPos extends Vec3i {
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this(pos.getX(), pos.getY(), pos.getZ());
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}
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+ public static long getAdjacent(int baseX, int baseY, int baseZ, Direction enumdirection) { return asLong(baseX + enumdirection.getStepX(), baseY + enumdirection.getStepY(), baseZ + enumdirection.getStepZ()); } // Paper
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public static long offset(long value, Direction direction) {
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return offset(value, direction.getStepX(), direction.getStepY(), direction.getStepZ());
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}
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public static long offset(long value, int x, int y, int z) {
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- return asLong(getX(value) + x, getY(value) + y, getZ(value) + z);
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+ return asLong((int) (value >> 38) + x, (int) ((value << 52) >> 52) + y, (int) ((value << 26) >> 38) + z); // Paper - simplify/inline
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}
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public static int getX(long packedPos) {
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- return (int)(packedPos << 64 - X_OFFSET - PACKED_HORIZONTAL_LENGTH >> 64 - PACKED_HORIZONTAL_LENGTH);
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+ return (int) (packedPos >> 38); // Paper - simplify/inline
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}
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public static int getY(long packedPos) {
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- return (int)(packedPos << 64 - PACKED_Y_LENGTH >> 64 - PACKED_Y_LENGTH);
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+ return (int) ((packedPos << 52) >> 52); // Paper - simplify/inline
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}
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public static int getZ(long packedPos) {
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- return (int)(packedPos << 64 - Z_OFFSET - PACKED_HORIZONTAL_LENGTH >> 64 - PACKED_HORIZONTAL_LENGTH);
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+ return (int) ((packedPos << 26) >> 38); // Paper - simplify/inline
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}
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public static BlockPos of(long packedPos) {
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- return new BlockPos(getX(packedPos), getY(packedPos), getZ(packedPos));
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+ return new BlockPos((int) (packedPos >> 38), (int) ((packedPos << 52) >> 52), (int) ((packedPos << 26) >> 38)); // Paper - simplify/inline
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}
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public static BlockPos containing(double x, double y, double z) {
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@@ -113,10 +116,7 @@ public class BlockPos extends Vec3i {
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}
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public static long asLong(int x, int y, int z) {
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- long l = 0L;
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- l |= ((long)x & PACKED_X_MASK) << X_OFFSET;
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- l |= ((long)y & PACKED_Y_MASK) << 0;
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- return l | ((long)z & PACKED_Z_MASK) << Z_OFFSET;
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+ return (((long) x & (long) 67108863) << 38) | (((long) y & (long) 4095)) | (((long) z & (long) 67108863) << 12); // Paper - inline constants and simplify
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}
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public static long getFlatIndex(long y) {
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diff --git a/src/main/java/net/minecraft/core/SectionPos.java b/src/main/java/net/minecraft/core/SectionPos.java
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index 14e852684dcbba43abab0ec7de38f4fc09babd27..137a15e142c6e934804e3f2a072cdac8d40a2ab2 100644
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--- a/src/main/java/net/minecraft/core/SectionPos.java
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+++ b/src/main/java/net/minecraft/core/SectionPos.java
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@@ -38,7 +38,7 @@ public class SectionPos extends Vec3i {
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}
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public static SectionPos of(BlockPos pos) {
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- return new SectionPos(blockToSectionCoord(pos.getX()), blockToSectionCoord(pos.getY()), blockToSectionCoord(pos.getZ()));
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+ return new SectionPos(pos.getX() >> 4, pos.getY() >> 4, pos.getZ() >> 4); // Paper
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}
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public static SectionPos of(ChunkPos chunkPos, int y) {
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@@ -54,7 +54,7 @@ public class SectionPos extends Vec3i {
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}
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public static SectionPos of(long packed) {
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- return new SectionPos(x(packed), y(packed), z(packed));
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+ return new SectionPos((int) (packed >> 42), (int) (packed << 44 >> 44), (int) (packed << 22 >> 42)); // Paper
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}
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public static SectionPos bottomOf(ChunkAccess chunk) {
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@@ -65,8 +65,16 @@ public class SectionPos extends Vec3i {
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return offset(packed, direction.getStepX(), direction.getStepY(), direction.getStepZ());
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}
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+ // Paper start
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+ public static long getAdjacentFromBlockPos(int x, int y, int z, Direction enumdirection) {
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+ return (((long) ((x >> 4) + enumdirection.getStepX()) & 4194303L) << 42) | (((long) ((y >> 4) + enumdirection.getStepY()) & 1048575L)) | (((long) ((z >> 4) + enumdirection.getStepZ()) & 4194303L) << 20);
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+ }
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+ public static long getAdjacentFromSectionPos(int x, int y, int z, Direction enumdirection) {
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+ return (((long) (x + enumdirection.getStepX()) & 4194303L) << 42) | (((long) ((y) + enumdirection.getStepY()) & 1048575L)) | (((long) (z + enumdirection.getStepZ()) & 4194303L) << 20);
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+ }
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+ // Paper end
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public static long offset(long packed, int x, int y, int z) {
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- return asLong(x(packed) + x, y(packed) + y, z(packed) + z);
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+ return (((long) ((int) (packed >> 42) + x) & 4194303L) << 42) | (((long) ((int) (packed << 44 >> 44) + y) & 1048575L)) | (((long) ((int) (packed << 22 >> 42) + z) & 4194303L) << 20); // Simplify to reduce instruction count
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}
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public static int posToSectionCoord(double coord) {
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@@ -86,10 +94,7 @@ public class SectionPos extends Vec3i {
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}
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public static short sectionRelativePos(BlockPos pos) {
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- int i = sectionRelative(pos.getX());
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- int j = sectionRelative(pos.getY());
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- int k = sectionRelative(pos.getZ());
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- return (short)(i << 8 | k << 4 | j << 0);
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+ return (short) ((pos.getX() & 15) << 8 | (pos.getZ() & 15) << 4 | pos.getY() & 15); // Paper - simplify/inline
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}
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public static int sectionRelativeX(short packedLocalPos) {
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@@ -152,16 +157,16 @@ public class SectionPos extends Vec3i {
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return this.getZ();
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}
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- public int minBlockX() {
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- return sectionToBlockCoord(this.x());
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+ public final int minBlockX() { // Paper - make final
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+ return this.getX() << 4; // Paper - inline
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}
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- public int minBlockY() {
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- return sectionToBlockCoord(this.y());
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+ public final int minBlockY() { // Paper - make final
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+ return this.getY() << 4; // Paper - inline
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}
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- public int minBlockZ() {
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- return sectionToBlockCoord(this.z());
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+ public int minBlockZ() { // Paper - make final
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+ return this.getZ() << 4; // Paper - inline
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}
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public int maxBlockX() {
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@@ -177,7 +182,8 @@ public class SectionPos extends Vec3i {
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}
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public static long blockToSection(long blockPos) {
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- return asLong(blockToSectionCoord(BlockPos.getX(blockPos)), blockToSectionCoord(BlockPos.getY(blockPos)), blockToSectionCoord(BlockPos.getZ(blockPos)));
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+ // b(a(BlockPosition.b(i)), a(BlockPosition.c(i)), a(BlockPosition.d(i)));
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+ return (((long) (int) (blockPos >> 42) & 4194303L) << 42) | (((long) (int) ((blockPos << 52) >> 56) & 1048575L)) | (((long) (int) ((blockPos << 26) >> 42) & 4194303L) << 20); // Simplify to reduce instruction count
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}
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public static long getZeroNode(int x, int z) {
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@@ -205,15 +211,18 @@ public class SectionPos extends Vec3i {
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return asLong(blockToSectionCoord(pos.getX()), blockToSectionCoord(pos.getY()), blockToSectionCoord(pos.getZ()));
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}
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+ // Paper start
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+ public static long blockPosAsSectionLong(int i, int j, int k) {
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+ return (((long) (i >> 4) & 4194303L) << 42) | (((long) (j >> 4) & 1048575L)) | (((long) (k >> 4) & 4194303L) << 20);
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+ }
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+ // Paper end
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+
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public static long asLong(int x, int y, int z) {
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- long l = 0L;
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- l |= ((long)x & 4194303L) << 42;
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- l |= ((long)y & 1048575L) << 0;
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- return l | ((long)z & 4194303L) << 20;
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+ return (((long) x & 4194303L) << 42) | (((long) y & 1048575L)) | (((long) z & 4194303L) << 20); // Paper - Simplify to reduce instruction count
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}
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public long asLong() {
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- return asLong(this.x(), this.y(), this.z());
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+ return (((long) getX() & 4194303L) << 42) | (((long) getY() & 1048575L)) | (((long) getZ() & 4194303L) << 20); // Paper - Simplify to reduce instruction count
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}
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@Override
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@@ -226,16 +235,11 @@ public class SectionPos extends Vec3i {
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}
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public static Stream<SectionPos> cube(SectionPos center, int radius) {
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- int i = center.x();
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- int j = center.y();
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- int k = center.z();
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- return betweenClosedStream(i - radius, j - radius, k - radius, i + radius, j + radius, k + radius);
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+ return betweenClosedStream(center.getX() - radius, center.getY() - radius, center.getZ() - radius, center.getX() + radius, center.getY() + radius, center.getZ() + radius); // Paper - simplify/inline
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}
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public static Stream<SectionPos> aroundChunk(ChunkPos center, int radius, int minY, int maxY) {
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- int i = center.x;
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- int j = center.z;
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- return betweenClosedStream(i - radius, minY, j - radius, i + radius, maxY, j + radius);
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+ return betweenClosedStream(center.x - radius, minY, center.z - radius, center.x + radius, maxY, center.z + radius); // Paper - simplify/inline
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}
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public static Stream<SectionPos> betweenClosedStream(int minX, int minY, int minZ, int maxX, int maxY, int maxZ) {
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