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Add Shuffle4Slice3

js/color-alpha-handling
James Jackson-South 5 years ago
parent
c4f7f67fd5
commit
aec8e5d690
6 changed files with 299 additions and 33 deletions
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  1. 77
      src/ImageSharp/Common/Helpers/SimdUtils.HwIntrinsics.cs
  2. 72
      src/ImageSharp/Common/Helpers/SimdUtils.Shuffle.cs
  3. 47
      tests/ImageSharp.Benchmarks/Color/Bulk/Pad3Shuffle4Channel.cs
  4. 68
      tests/ImageSharp.Benchmarks/Color/Bulk/Shuffle4Slice3Channel.cs
  5. 4
      tests/ImageSharp.Benchmarks/Color/Bulk/ShuffleFloat4Channel.cs
  6. 64
      tests/ImageSharp.Tests/Common/SimdUtilsTests.Shuffle.cs

77
src/ImageSharp/Common/Helpers/SimdUtils.HwIntrinsics.cs
View File

@ -119,6 +119,39 @@ namespace SixLabors.ImageSharp
}
}
/// <summary>
/// Shuffles then slices 8-bit integers within 128-bit lanes in <paramref name="source"/>
/// using the control and store the results in <paramref name="dest"/>.
/// </summary>
/// <param name="source">The source span of bytes.</param>
/// <param name="dest">The destination span of bytes.</param>
/// <param name="control">The byte control.</param>
[MethodImpl(InliningOptions.ShortMethod)]
public static unsafe void Shuffle4Slice3Reduce(
ref ReadOnlySpan<byte> source,
ref Span<byte> dest,
byte control)
{
if (Ssse3.IsSupported)
{
int remainder = ImageMaths.ModuloP2(dest.Length, Vector128<byte>.Count);
int adjustedCount = dest.Length - remainder;
int destSlice = (int)(adjustedCount * (3 / 4F));
if (adjustedCount > 0)
{
Shuffle4Slice3(
source.Slice(0, adjustedCount),
dest.Slice(0, adjustedCount),
control);
source = source.Slice(adjustedCount);
dest = dest.Slice(destSlice);
}
}
}
[MethodImpl(InliningOptions.ShortMethod)]
private static void Shuffle4(
ReadOnlySpan<float> source,
@ -316,6 +349,50 @@ namespace SixLabors.ImageSharp
}
}
[MethodImpl(InliningOptions.ShortMethod)]
private static unsafe void Shuffle4Slice3(
ReadOnlySpan<byte> source,
Span<byte> dest,
byte control)
{
if (Ssse3.IsSupported)
{
Vector128<byte> sliceMask = Vector128.Create(0, 1, 2, 4, 5, 6, 8, 9, 10, 12, 13, 14, -1, -1, -1, -1).AsByte();
Span<byte> bytes = stackalloc byte[Vector128<byte>.Count];
Shuffle.MmShuffleSpan(ref bytes, control);
Vector128<byte> vcm = Unsafe.As<byte, Vector128<byte>>(ref MemoryMarshal.GetReference(bytes));
// var control = MmShuffle(3, 0, 1, 2);
// Span<byte> bytes = stackalloc byte[Vector128<byte>.Count];
// MmShuffleSpan(ref bytes, control);
// Vector128<byte> vcm = Unsafe.As<byte, Vector128<byte>>(ref MemoryMarshal.GetReference(bytes));
//
// Vector128<byte> s0 = Vector128.Create((byte)1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, 1).Dump("s0");
// Vector128<byte> padded = Ssse3.Shuffle(s0, padMask).Dump("padded");
//
// padded = Sse3.Or(Vector128.Create(0xff000000u).AsByte(), padded).Dump("0r");
//
// var shuffled = Ssse3.Shuffle(padded, vcm).Dump("shuffled");
// var d0 = Ssse3.Shuffle(shuffled, sliceMask).Dump("d0");
fixed (byte* sBase = &source.GetPinnableReference())
fixed (byte* dBase = &dest.GetPinnableReference())
{
byte* s = sBase;
byte* d = dBase;
for (int i = 0; i < source.Length; i += 16)
{
Vector128<byte> vs0 = Ssse3.Shuffle(Sse2.LoadVector128(s), vcm);
Sse2.Store(d, Ssse3.Shuffle(vs0, sliceMask));
s += 16;
d += 12;
}
}
}
}
/// <summary>
/// Performs a multiplication and an addition of the <see cref="Vector256{T}"/>.
/// </summary>

72
src/ImageSharp/Common/Helpers/SimdUtils.Shuffle.cs
View File

@ -69,7 +69,7 @@ namespace SixLabors.ImageSharp
Span<byte> dest,
byte control)
{
VerifyPadShuffleSpanInput(source, dest);
VerifyPad3Shuffle4SpanInput(source, dest);
#if SUPPORTS_RUNTIME_INTRINSICS
HwIntrinsics.Pad3Shuffle4Reduce(ref source, ref dest, control);
@ -82,6 +82,25 @@ namespace SixLabors.ImageSharp
}
}
[MethodImpl(InliningOptions.ShortMethod)]
public static void Shuffle4Slice3(
ReadOnlySpan<byte> source,
Span<byte> dest,
byte control)
{
VerifyShuffle4Slice3SpanInput(source, dest);
#if SUPPORTS_RUNTIME_INTRINSICS
HwIntrinsics.Shuffle4Slice3Reduce(ref source, ref dest, control);
#endif
// Deal with the remainder:
if (source.Length > 0)
{
Shuffle4Slice3Remainder(source, dest, control);
}
}
public static void Shuffle4Remainder(
ReadOnlySpan<float> source,
Span<float> dest,
@ -118,6 +137,23 @@ namespace SixLabors.ImageSharp
}
}
public static void Shuffle4Slice3Remainder(
ReadOnlySpan<byte> source,
Span<byte> dest,
byte control)
{
ref byte sBase = ref MemoryMarshal.GetReference(source);
ref byte dBase = ref MemoryMarshal.GetReference(dest);
Shuffle.InverseMmShuffle(control, out int _, out int p2, out int p1, out int p0);
for (int i = 0, j = 0; i < dest.Length; i += 3, j += 4)
{
Unsafe.Add(ref dBase, i) = Unsafe.Add(ref sBase, p0 + j);
Unsafe.Add(ref dBase, i + 1) = Unsafe.Add(ref sBase, p1 + j);
Unsafe.Add(ref dBase, i + 2) = Unsafe.Add(ref sBase, p2 + j);
}
}
[Conditional("DEBUG")]
private static void VerifyShuffleSpanInput<T>(ReadOnlySpan<T> source, Span<T> dest)
where T : struct
@ -130,21 +166,45 @@ namespace SixLabors.ImageSharp
DebugGuard.IsTrue(
source.Length % 4 == 0,
nameof(source),
"Input spans must be divisiable by 4!");
"Input spans must be divisable by 4!");
}
[Conditional("DEBUG")]
private static void VerifyPadShuffleSpanInput(ReadOnlySpan<byte> source, Span<byte> dest)
private static void VerifyPad3Shuffle4SpanInput(ReadOnlySpan<byte> source, Span<byte> dest)
{
DebugGuard.IsTrue(
source.Length % 3 == 0,
nameof(source),
"Input span must be divisable by 3!");
DebugGuard.IsTrue(
dest.Length % 4 == 0,
nameof(dest),
"Output span must be divisable by 4!");
DebugGuard.IsTrue(
source.Length == (int)(dest.Length * 3 / 4F),
nameof(source),
"Input spans must be 3/4 the length of the output span!");
"Input span must be 3/4 the length of the output span!");
}
[Conditional("DEBUG")]
private static void VerifyShuffle4Slice3SpanInput(ReadOnlySpan<byte> source, Span<byte> dest)
{
DebugGuard.IsTrue(
source.Length % 3 == 0,
source.Length % 4 == 0,
nameof(source),
"Input span must be divisable by 4!");
DebugGuard.IsTrue(
dest.Length % 3 == 0,
nameof(dest),
"Output span must be divisable by 3!");
DebugGuard.IsTrue(
source.Length == (int)(dest.Length * 4 / 3F),
nameof(source),
"Input spans must be divisiable by 3!");
"Output span must be 3/4 the length of the input span!");
}
public static class Shuffle

47
tests/ImageSharp.Benchmarks/Color/Bulk/Pad3Shuffle4Channel.cs
View File

@ -9,6 +9,7 @@ namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces.Bulk
[Config(typeof(Config.HwIntrinsics_SSE_AVX))]
public class Pad3Shuffle4Channel
{
private static readonly byte Control = default(WXYZShuffle4).Control;
private byte[] source;
private byte[] destination;
@ -17,20 +18,20 @@ namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces.Bulk
{
this.source = new byte[this.Count];
new Random(this.Count).NextBytes(this.source);
this.destination = new byte[this.Count];
this.destination = new byte[(int)(this.Count * (4 / 3F))];
}
[Params(96, 384, 768, 1536)]
public int Count { get; set; }
[Benchmark]
public void Shuffle4Channel()
public void Pad3Shuffle4()
{
SimdUtils.Shuffle4<WXYZShuffle4>(this.source, this.destination, default);
SimdUtils.Pad3Shuffle4(this.source, this.destination, Control);
}
}
// 2020-10-29
// 2020-10-30
// ##########
//
// BenchmarkDotNet=v0.12.1, OS=Windows 10.0.19041.572 (2004/?/20H1)
@ -43,25 +44,21 @@ namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces.Bulk
//
// Runtime=.NET Core 3.1
//
// | Method | Job | EnvironmentVariables | Count | Mean | Error | StdDev | Ratio | RatioSD | Gen 0 | Gen 1 | Gen 2 | Allocated |
// |---------------- |------------------- |-------------------------------------------------- |------ |----------:|---------:|---------:|------:|--------:|------:|------:|------:|----------:|
// | Shuffle4Channel | 1. No HwIntrinsics | COMPlus_EnableHWIntrinsic=0,COMPlus_FeatureSIMD=0 | 128 | 17.39 ns | 0.187 ns | 0.175 ns | 1.00 | 0.00 | - | - | - | - |
// | Shuffle4Channel | 2. AVX | Empty | 128 | 21.72 ns | 0.299 ns | 0.279 ns | 1.25 | 0.02 | - | - | - | - |
// | Shuffle4Channel | 3. SSE | COMPlus_EnableAVX=0 | 128 | 18.10 ns | 0.346 ns | 0.289 ns | 1.04 | 0.02 | - | - | - | - |
// | | | | | | | | | | | | | |
// | Shuffle4Channel | 1. No HwIntrinsics | COMPlus_EnableHWIntrinsic=0,COMPlus_FeatureSIMD=0 | 256 | 35.51 ns | 0.711 ns | 0.790 ns | 1.00 | 0.00 | - | - | - | - |
// | Shuffle4Channel | 2. AVX | Empty | 256 | 23.90 ns | 0.508 ns | 0.820 ns | 0.69 | 0.02 | - | - | - | - |
// | Shuffle4Channel | 3. SSE | COMPlus_EnableAVX=0 | 256 | 20.40 ns | 0.133 ns | 0.111 ns | 0.57 | 0.01 | - | - | - | - |
// | | | | | | | | | | | | | |
// | Shuffle4Channel | 1. No HwIntrinsics | COMPlus_EnableHWIntrinsic=0,COMPlus_FeatureSIMD=0 | 512 | 73.39 ns | 0.310 ns | 0.259 ns | 1.00 | 0.00 | - | - | - | - |
// | Shuffle4Channel | 2. AVX | Empty | 512 | 26.10 ns | 0.418 ns | 0.391 ns | 0.36 | 0.01 | - | - | - | - |
// | Shuffle4Channel | 3. SSE | COMPlus_EnableAVX=0 | 512 | 27.59 ns | 0.556 ns | 0.571 ns | 0.38 | 0.01 | - | - | - | - |
// | | | | | | | | | | | | | |
// | Shuffle4Channel | 1. No HwIntrinsics | COMPlus_EnableHWIntrinsic=0,COMPlus_FeatureSIMD=0 | 1024 | 150.64 ns | 2.903 ns | 2.716 ns | 1.00 | 0.00 | - | - | - | - |
// | Shuffle4Channel | 2. AVX | Empty | 1024 | 38.67 ns | 0.801 ns | 1.889 ns | 0.24 | 0.02 | - | - | - | - |
// | Shuffle4Channel | 3. SSE | COMPlus_EnableAVX=0 | 1024 | 47.13 ns | 0.948 ns | 1.054 ns | 0.31 | 0.01 | - | - | - | - |
// | | | | | | | | | | | | | |
// | Shuffle4Channel | 1. No HwIntrinsics | COMPlus_EnableHWIntrinsic=0,COMPlus_FeatureSIMD=0 | 2048 | 315.29 ns | 5.206 ns | 6.583 ns | 1.00 | 0.00 | - | - | - | - |
// | Shuffle4Channel | 2. AVX | Empty | 2048 | 57.37 ns | 1.152 ns | 1.078 ns | 0.18 | 0.01 | - | - | - | - |
// | Shuffle4Channel | 3. SSE | COMPlus_EnableAVX=0 | 2048 | 65.75 ns | 1.198 ns | 1.600 ns | 0.21 | 0.01 | - | - | - | - |
// | Method | Job | EnvironmentVariables | Count | Mean | Error | StdDev | Ratio | RatioSD | Gen 0 | Gen 1 | Gen 2 | Allocated |
// |------------- |------------------- |-------------------------------------------------- |------ |----------:|---------:|---------:|------:|--------:|------:|------:|------:|----------:|
// | Pad3Shuffle4 | 1. No HwIntrinsics | COMPlus_EnableHWIntrinsic=0,COMPlus_FeatureSIMD=0 | 96 | 62.91 ns | 1.240 ns | 1.569 ns | 1.00 | 0.00 | - | - | - | - |
// | Pad3Shuffle4 | 2. AVX | Empty | 96 | 44.34 ns | 0.371 ns | 0.329 ns | 0.70 | 0.02 | - | - | - | - |
// | Pad3Shuffle4 | 3. SSE | COMPlus_EnableAVX=0 | 96 | 44.46 ns | 0.617 ns | 0.515 ns | 0.70 | 0.02 | - | - | - | - |
// | | | | | | | | | | | | | |
// | Pad3Shuffle4 | 1. No HwIntrinsics | COMPlus_EnableHWIntrinsic=0,COMPlus_FeatureSIMD=0 | 384 | 247.93 ns | 2.640 ns | 2.470 ns | 1.00 | 0.00 | - | - | - | - |
// | Pad3Shuffle4 | 2. AVX | Empty | 384 | 92.91 ns | 1.204 ns | 1.127 ns | 0.37 | 0.01 | - | - | - | - |
// | Pad3Shuffle4 | 3. SSE | COMPlus_EnableAVX=0 | 384 | 91.42 ns | 1.234 ns | 1.094 ns | 0.37 | 0.01 | - | - | - | - |
// | | | | | | | | | | | | | |
// | Pad3Shuffle4 | 1. No HwIntrinsics | COMPlus_EnableHWIntrinsic=0,COMPlus_FeatureSIMD=0 | 768 | 444.79 ns | 5.094 ns | 4.254 ns | 1.00 | 0.00 | - | - | - | - |
// | Pad3Shuffle4 | 2. AVX | Empty | 768 | 162.92 ns | 1.046 ns | 0.873 ns | 0.37 | 0.00 | - | - | - | - |
// | Pad3Shuffle4 | 3. SSE | COMPlus_EnableAVX=0 | 768 | 166.22 ns | 1.728 ns | 1.443 ns | 0.37 | 0.00 | - | - | - | - |
// | | | | | | | | | | | | | |
// | Pad3Shuffle4 | 1. No HwIntrinsics | COMPlus_EnableHWIntrinsic=0,COMPlus_FeatureSIMD=0 | 1536 | 882.51 ns | 6.936 ns | 5.792 ns | 1.00 | 0.00 | - | - | - | - |
// | Pad3Shuffle4 | 2. AVX | Empty | 1536 | 309.72 ns | 3.777 ns | 3.533 ns | 0.35 | 0.01 | - | - | - | - |
// | Pad3Shuffle4 | 3. SSE | COMPlus_EnableAVX=0 | 1536 | 323.18 ns | 4.079 ns | 3.816 ns | 0.37 | 0.00 | - | - | - | - |
}

68
tests/ImageSharp.Benchmarks/Color/Bulk/Shuffle4Slice3Channel.cs
View File

@ -0,0 +1,68 @@
// Copyright (c) Six Labors.
// Licensed under the Apache License, Version 2.0.
using System;
using BenchmarkDotNet.Attributes;
namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces.Bulk
{
[Config(typeof(Config.HwIntrinsics_SSE_AVX))]
public class Shuffle4Slice3Channel
{
private static readonly byte Control = default(WXYZShuffle4).Control;
private byte[] source;
private byte[] destination;
[GlobalSetup]
public void Setup()
{
this.source = new byte[this.Count];
new Random(this.Count).NextBytes(this.source);
this.destination = new byte[(int)(this.Count * (3 / 4F))];
}
[Params(128, 256, 512, 1024, 2048)]
public int Count { get; set; }
[Benchmark]
public void Shuffle4Slice3()
{
SimdUtils.Shuffle4Slice3(this.source, this.destination, Control);
}
}
// 2020-10-29
// ##########
//
// BenchmarkDotNet=v0.12.1, OS=Windows 10.0.19041.572 (2004/?/20H1)
// Intel Core i7-8650U CPU 1.90GHz (Kaby Lake R), 1 CPU, 8 logical and 4 physical cores
// .NET Core SDK=3.1.403
// [Host] : .NET Core 3.1.9 (CoreCLR 4.700.20.47201, CoreFX 4.700.20.47203), X64 RyuJIT
// 1. No HwIntrinsics : .NET Core 3.1.9 (CoreCLR 4.700.20.47201, CoreFX 4.700.20.47203), X64 RyuJIT
// 2. AVX : .NET Core 3.1.9 (CoreCLR 4.700.20.47201, CoreFX 4.700.20.47203), X64 RyuJIT
// 3. SSE : .NET Core 3.1.9 (CoreCLR 4.700.20.47201, CoreFX 4.700.20.47203), X64 RyuJIT
//
// Runtime=.NET Core 3.1
//
// | Method | Job | EnvironmentVariables | Count | Mean | Error | StdDev | Median | Ratio | RatioSD | Gen 0 | Gen 1 | Gen 2 | Allocated |
// |---------------- |------------------- |-------------------------------------------------- |------ |----------:|---------:|---------:|----------:|------:|--------:|------:|------:|------:|----------:|
// | Shuffle4Channel | 1. No HwIntrinsics | COMPlus_EnableHWIntrinsic=0,COMPlus_FeatureSIMD=0 | 128 | 50.09 ns | 1.018 ns | 1.460 ns | 49.16 ns | 1.00 | 0.00 | - | - | - | - |
// | Shuffle4Channel | 2. AVX | Empty | 128 | 35.28 ns | 0.106 ns | 0.089 ns | 35.30 ns | 0.69 | 0.02 | - | - | - | - |
// | Shuffle4Channel | 3. SSE | COMPlus_EnableAVX=0 | 128 | 35.13 ns | 0.247 ns | 0.231 ns | 35.22 ns | 0.69 | 0.02 | - | - | - | - |
// | | | | | | | | | | | | | | |
// | Shuffle4Channel | 1. No HwIntrinsics | COMPlus_EnableHWIntrinsic=0,COMPlus_FeatureSIMD=0 | 256 | 101.48 ns | 0.875 ns | 0.819 ns | 101.60 ns | 1.00 | 0.00 | - | - | - | - |
// | Shuffle4Channel | 2. AVX | Empty | 256 | 53.25 ns | 0.518 ns | 0.433 ns | 53.21 ns | 0.52 | 0.00 | - | - | - | - |
// | Shuffle4Channel | 3. SSE | COMPlus_EnableAVX=0 | 256 | 57.21 ns | 0.508 ns | 0.451 ns | 57.38 ns | 0.56 | 0.01 | - | - | - | - |
// | | | | | | | | | | | | | | |
// | Shuffle4Channel | 1. No HwIntrinsics | COMPlus_EnableHWIntrinsic=0,COMPlus_FeatureSIMD=0 | 512 | 202.53 ns | 0.884 ns | 0.827 ns | 202.40 ns | 1.00 | 0.00 | - | - | - | - |
// | Shuffle4Channel | 2. AVX | Empty | 512 | 82.55 ns | 0.418 ns | 0.391 ns | 82.59 ns | 0.41 | 0.00 | - | - | - | - |
// | Shuffle4Channel | 3. SSE | COMPlus_EnableAVX=0 | 512 | 82.89 ns | 1.057 ns | 0.989 ns | 82.48 ns | 0.41 | 0.00 | - | - | - | - |
// | | | | | | | | | | | | | | |
// | Shuffle4Channel | 1. No HwIntrinsics | COMPlus_EnableHWIntrinsic=0,COMPlus_FeatureSIMD=0 | 1024 | 398.79 ns | 7.807 ns | 6.921 ns | 395.67 ns | 1.00 | 0.00 | - | - | - | - |
// | Shuffle4Channel | 2. AVX | Empty | 1024 | 144.51 ns | 1.033 ns | 0.966 ns | 144.42 ns | 0.36 | 0.01 | - | - | - | - |
// | Shuffle4Channel | 3. SSE | COMPlus_EnableAVX=0 | 1024 | 143.77 ns | 0.820 ns | 0.684 ns | 143.62 ns | 0.36 | 0.01 | - | - | - | - |
// | | | | | | | | | | | | | | |
// | Shuffle4Channel | 1. No HwIntrinsics | COMPlus_EnableHWIntrinsic=0,COMPlus_FeatureSIMD=0 | 2048 | 798.44 ns | 4.447 ns | 3.472 ns | 799.39 ns | 1.00 | 0.00 | - | - | - | - |
// | Shuffle4Channel | 2. AVX | Empty | 2048 | 277.12 ns | 1.723 ns | 1.612 ns | 276.93 ns | 0.35 | 0.00 | - | - | - | - |
// | Shuffle4Channel | 3. SSE | COMPlus_EnableAVX=0 | 2048 | 275.70 ns | 1.796 ns | 1.500 ns | 275.51 ns | 0.35 | 0.00 | - | - | - | - ||
}

4
tests/ImageSharp.Benchmarks/Color/Bulk/ShuffleFloat4Channel.cs
View File

@ -10,7 +10,7 @@ namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces.Bulk
[Config(typeof(Config.HwIntrinsics_SSE_AVX))]
public class ShuffleFloat4Channel
{
private static readonly byte control = default(WXYZShuffle4).Control;
private static readonly byte Control = default(WXYZShuffle4).Control;
private float[] source;
private float[] destination;
@ -27,7 +27,7 @@ namespace SixLabors.ImageSharp.Benchmarks.ColorSpaces.Bulk
[Benchmark]
public void Shuffle4Channel()
{
SimdUtils.Shuffle4(this.source, this.destination, control);
SimdUtils.Shuffle4(this.source, this.destination, Control);
}
}

64
tests/ImageSharp.Tests/Common/SimdUtilsTests.Shuffle.cs
View File

@ -120,6 +120,29 @@ namespace SixLabors.ImageSharp.Tests.Common
HwIntrinsics.AllowAll | HwIntrinsics.DisableAVX | HwIntrinsics.DisableSSE);
}
[Theory]
[MemberData(nameof(ArraySizesDivisibleBy4))]
public void BulkShuffle4Slice3Channel(int count)
{
static void RunTest(string serialized)
{
// No need to test multiple shuffle controls as the
// pipeline is always the same.
int size = FeatureTestRunner.Deserialize<int>(serialized);
byte control = default(WZYXShuffle4).Control;
TestShuffle4Slice3Channel(
size,
(s, d) => SimdUtils.Shuffle4Slice3(s.Span, d.Span, control),
control);
}
FeatureTestRunner.RunWithHwIntrinsicsFeature(
RunTest,
count,
HwIntrinsics.AllowAll | HwIntrinsics.DisableAVX | HwIntrinsics.DisableSSE);
}
private static void TestShuffleFloat4Channel(
int count,
Action<Memory<float>, Memory<float>> convert,
@ -210,6 +233,47 @@ namespace SixLabors.ImageSharp.Tests.Common
convert(source, result);
for (int i = 0; i < expected.Length; i++)
{
Assert.Equal(expected[i], result[i]);
}
Assert.Equal(expected, result);
}
private static void TestShuffle4Slice3Channel(
int count,
Action<Memory<byte>, Memory<byte>> convert,
byte control)
{
byte[] source = new byte[count];
new Random(count).NextBytes(source);
var result = new byte[(int)(count * (3 / 4F))];
byte[] expected = new byte[result.Length];
SimdUtils.Shuffle.InverseMmShuffle(
control,
out int _,
out int p2,
out int p1,
out int p0);
for (int i = 0, j = 0; i < expected.Length; i += 3, j += 4)
{
expected[i] = source[p0 + j];
expected[i + 1] = source[p1 + j];
expected[i + 2] = source[p2 + j];
}
convert(source, result);
for (int i = 0; i < expected.Length; i++)
{
Assert.Equal(expected[i], result[i]);
}
Assert.Equal(expected, result);
}
}

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