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General code refactor and cleanup.

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This commit is contained in:
Natalia Portillo
2022-11-23 18:16:04 +00:00
parent 40487268b4
commit aa5bbc1f5b
21 changed files with 340 additions and 331 deletions
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35
CRC64/clmul.cs
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@@ -21,13 +21,13 @@
// Copyright © 2011-2022 Natalia Portillo
// ****************************************************************************/
namespace Aaru.Checksums.CRC64;
using System;
using System.Runtime.CompilerServices;
using System.Runtime.Intrinsics;
using System.Runtime.Intrinsics.X86;
namespace Aaru.Checksums.CRC64;
static class Clmul
{
static readonly byte[] _shuffleMasks =
@@ -42,13 +42,14 @@ static class Clmul
{
uint maskPos = 16 - n;
var maskA = Vector128.Create(_shuffleMasks[maskPos], _shuffleMasks[maskPos + 1], _shuffleMasks[maskPos + 2],
_shuffleMasks[maskPos + 3], _shuffleMasks[maskPos + 4], _shuffleMasks[maskPos + 5],
_shuffleMasks[maskPos + 6], _shuffleMasks[maskPos + 7], _shuffleMasks[maskPos + 8],
_shuffleMasks[maskPos + 9], _shuffleMasks[maskPos + 10],
_shuffleMasks[maskPos + 11], _shuffleMasks[maskPos + 12],
_shuffleMasks[maskPos + 13], _shuffleMasks[maskPos + 14],
_shuffleMasks[maskPos + 15]);
Vector128<byte> maskA = Vector128.Create(_shuffleMasks[maskPos], _shuffleMasks[maskPos + 1],
_shuffleMasks[maskPos + 2], _shuffleMasks[maskPos + 3],
_shuffleMasks[maskPos + 4], _shuffleMasks[maskPos + 5],
_shuffleMasks[maskPos + 6], _shuffleMasks[maskPos + 7],
_shuffleMasks[maskPos + 8], _shuffleMasks[maskPos + 9],
_shuffleMasks[maskPos + 10], _shuffleMasks[maskPos + 11],
_shuffleMasks[maskPos + 12], _shuffleMasks[maskPos + 13],
_shuffleMasks[maskPos + 14], _shuffleMasks[maskPos + 15]);
Vector128<byte> maskB = Sse2.Xor(maskA, Sse2.CompareEqual(Vector128<byte>.Zero, Vector128<byte>.Zero));
@@ -63,14 +64,14 @@ static class Clmul
internal static ulong Step(ulong crc, byte[] data, uint length)
{
var bufPos = 16;
const ulong k1 = 0xe05dd497ca393ae4;
const ulong k2 = 0xdabe95afc7875f40;
const ulong mu = 0x9c3e466c172963d5;
const ulong pol = 0x92d8af2baf0e1e85;
var foldConstants1 = Vector128.Create(k1, k2);
var foldConstants2 = Vector128.Create(mu, pol);
var initialCrc = Vector128.Create(~crc, 0);
int bufPos = 16;
const ulong k1 = 0xe05dd497ca393ae4;
const ulong k2 = 0xdabe95afc7875f40;
const ulong mu = 0x9c3e466c172963d5;
const ulong pol = 0x92d8af2baf0e1e85;
Vector128<ulong> foldConstants1 = Vector128.Create(k1, k2);
Vector128<ulong> foldConstants2 = Vector128.Create(mu, pol);
Vector128<ulong> initialCrc = Vector128.Create(~crc, 0);
length -= 16;
// Initial CRC can simply be added to data