Created
December 22, 2019 23:44
-
-
Save thatcosmonaut/bbfd66d385b4f6b31f8e2010d7b25120 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
using System.Numerics; | |
namespace Encompass.Collections | |
{ | |
public static class BitSet1024Builder | |
{ | |
public static BitSet1024 Zeroes() | |
{ | |
return new BitSet1024(Vector256Builder.Zeroes(), Vector256Builder.Zeroes(), Vector256Builder.Zeroes(), Vector256Builder.Zeroes()); | |
} | |
public static BitSet1024 Ones() | |
{ | |
return new BitSet1024(Vector256Builder.Ones(), Vector256Builder.Ones(), Vector256Builder.Ones(), Vector256Builder.Ones()); | |
} | |
} | |
public static class Vector256Builder | |
{ | |
static readonly uint[] zeroes = new uint[8]; // max size of a Vector<T> is 8 uints | |
static readonly uint[] ones = new uint[8] { uint.MaxValue, uint.MaxValue, uint.MaxValue, uint.MaxValue, uint.MaxValue, uint.MaxValue, uint.MaxValue, uint.MaxValue }; | |
static uint[] builderInts = new uint[8]; | |
private static void ResetBuilder() | |
{ | |
for (var i = 0; i < 8; i++) | |
{ | |
builderInts[i] = 0; | |
} | |
} | |
public static Vector<uint> Zeroes() | |
{ | |
return new Vector<uint>(zeroes); | |
} | |
public static Vector<uint> Ones() | |
{ | |
return new Vector<uint>(ones); | |
} | |
public static Vector<uint> Build(int index) | |
{ | |
if (index > 255) { throw new System.ArgumentOutOfRangeException(nameof(index)); } | |
ResetBuilder(); | |
builderInts[index / 32] |= (uint)(1 << (index % 32)); | |
return new Vector<uint>(builderInts); | |
} | |
} | |
public struct BitSet1024 | |
{ | |
public Vector<uint> A { get; } | |
public Vector<uint> B { get; } | |
public Vector<uint> C { get; } | |
public Vector<uint> D { get; } | |
internal BitSet1024(Vector<uint> a, Vector<uint> b, Vector<uint> c, Vector<uint> d) | |
{ | |
A = a; | |
B = b; | |
C = c; | |
D = d; | |
} | |
public BitSet1024 And(BitSet1024 other) | |
{ | |
return new BitSet1024(A & other.A, B & other.B, C & other.C, D & other.D); | |
} | |
public BitSet1024 Or(BitSet1024 other) | |
{ | |
return new BitSet1024(A | other.A, B | other.B, C | other.C, D | other.D); | |
} | |
public BitSet1024 Set(int index) | |
{ | |
if (index < 256) | |
{ | |
return new BitSet1024(A | Vector256Builder.Build(index % 256), B, C, D); | |
} | |
else if (index < 512) | |
{ | |
return new BitSet1024(A, B | Vector256Builder.Build(index % 256), C, D); | |
} | |
else if (index < 768) | |
{ | |
return new BitSet1024(A, B, C | Vector256Builder.Build(index % 256), D); | |
} | |
else if (index < 1024) | |
{ | |
return new BitSet1024(A, B, C, D | Vector256Builder.Build(index % 256)); | |
} | |
else | |
{ | |
throw new System.ArgumentOutOfRangeException(nameof(index)); | |
} | |
} | |
public BitSet1024 UnSet(int index) | |
{ | |
if (index < 256) | |
{ | |
return new BitSet1024(A & ~Vector256Builder.Build(index % 256), B, C, D); | |
} | |
else if (index < 512) | |
{ | |
return new BitSet1024(A, B & ~Vector256Builder.Build(index % 256), C, D); | |
} | |
else if (index < 768) | |
{ | |
return new BitSet1024(A, B, C & ~Vector256Builder.Build(index % 256), D); | |
} | |
else if (index < 1024) | |
{ | |
return new BitSet1024(A, B, C, D & ~Vector256Builder.Build(index % 256)); | |
} | |
else | |
{ | |
throw new System.ArgumentOutOfRangeException(nameof(index)); | |
} | |
} | |
public bool Get(int index) | |
{ | |
var vectorIndex = index % 256; | |
if (index < 256) | |
{ | |
return (A[vectorIndex / 32] & (uint)(1 << vectorIndex % 32)) != 0; | |
} | |
else if (index < 512) | |
{ | |
return (B[vectorIndex / 32] & (uint)(1 << vectorIndex % 32)) != 0; | |
} | |
else if (index < 768) | |
{ | |
return (C[vectorIndex / 32] & (uint)(1 << vectorIndex % 32)) != 0; | |
} | |
else if (index < 1024) | |
{ | |
return (D[vectorIndex / 32] & (uint)(1 << vectorIndex % 32)) != 0; | |
} | |
else | |
{ | |
throw new System.ArgumentOutOfRangeException(nameof(index)); | |
} | |
} | |
public bool AllTrue() | |
{ | |
for (var i = 0; i < 8; i++) | |
{ | |
if (A[i] != uint.MaxValue) { return false; } | |
if (B[i] != uint.MaxValue) { return false; } | |
if (C[i] != uint.MaxValue) { return false; } | |
if (D[i] != uint.MaxValue) { return false; } | |
} | |
return true; | |
} | |
public bool AllFalse() | |
{ | |
for (var i = 0; i < 8; i++) | |
{ | |
if (A[i] != 0) { return false; } | |
if (B[i] != 0) { return false; } | |
if (C[i] != 0) { return false; } | |
if (D[i] != 0) { return false; } | |
} | |
return true; | |
} | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Cool :)