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Avoid pinning

pull/1814/head
Brian Popow 5 years ago
parent
e8c0d2c897
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3c9c1bb23e
1 changed files with 22 additions and 26 deletions
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  1. 48
      src/ImageSharp/Formats/Webp/Lossy/LossyUtils.cs

48
src/ImageSharp/Formats/Webp/Lossy/LossyUtils.cs
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@ -4,6 +4,7 @@
using System; using System;
using System.Buffers.Binary; using System.Buffers.Binary;
using System.Runtime.CompilerServices; using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
#if SUPPORTS_RUNTIME_INTRINSICS #if SUPPORTS_RUNTIME_INTRINSICS
using System.Runtime.Intrinsics; using System.Runtime.Intrinsics;
using System.Runtime.Intrinsics.X86; using System.Runtime.Intrinsics.X86;
@ -814,33 +815,28 @@ namespace SixLabors.ImageSharp.Formats.Webp.Lossy
#if SUPPORTS_RUNTIME_INTRINSICS #if SUPPORTS_RUNTIME_INTRINSICS
if (Sse2.IsSupported) if (Sse2.IsSupported)
{ {
#pragma warning disable SA1503 // Braces should not be omitted
tmp.Clear(); tmp.Clear();
fixed (byte* inputPtr = input) Vector128<byte> a0 = Unsafe.As<byte, Vector128<byte>>(ref MemoryMarshal.GetReference(input));
fixed (ushort* tmpPtr = tmp) Vector128<byte> a1 = Unsafe.As<byte, Vector128<byte>>(ref MemoryMarshal.GetReference(input.Slice(WebpConstants.Bps, 16)));
{ Vector128<byte> a2 = Unsafe.As<byte, Vector128<byte>>(ref MemoryMarshal.GetReference(input.Slice(WebpConstants.Bps * 2, 16)));
Vector128<byte> a0 = Sse2.LoadVector128(inputPtr); Vector128<byte> a3 = Unsafe.As<byte, Vector128<byte>>(ref MemoryMarshal.GetReference(input.Slice(WebpConstants.Bps * 3, 16)));
Vector128<byte> a1 = Sse2.LoadVector128(inputPtr + WebpConstants.Bps); Vector128<short> b0 = Sse2.ShiftRightLogical(a0.AsInt16(), 8); // hi byte
Vector128<byte> a2 = Sse2.LoadVector128(inputPtr + (WebpConstants.Bps * 2)); Vector128<short> b1 = Sse2.ShiftRightLogical(a1.AsInt16(), 8);
Vector128<byte> a3 = Sse2.LoadVector128(inputPtr + (WebpConstants.Bps * 3)); Vector128<short> b2 = Sse2.ShiftRightLogical(a2.AsInt16(), 8);
Vector128<short> b0 = Sse2.ShiftRightLogical(a0.AsInt16(), 8); // hi byte Vector128<short> b3 = Sse2.ShiftRightLogical(a3.AsInt16(), 8);
Vector128<short> b1 = Sse2.ShiftRightLogical(a1.AsInt16(), 8); Vector128<byte> c0 = Sse2.And(a0, Mean16x4Mask); // lo byte
Vector128<short> b2 = Sse2.ShiftRightLogical(a2.AsInt16(), 8); Vector128<byte> c1 = Sse2.And(a1, Mean16x4Mask);
Vector128<short> b3 = Sse2.ShiftRightLogical(a3.AsInt16(), 8); Vector128<byte> c2 = Sse2.And(a2, Mean16x4Mask);
Vector128<byte> c0 = Sse2.And(a0, Mean16x4Mask); // lo byte Vector128<byte> c3 = Sse2.And(a3, Mean16x4Mask);
Vector128<byte> c1 = Sse2.And(a1, Mean16x4Mask); Vector128<int> d0 = Sse2.Add(b0.AsInt32(), c0.AsInt32());
Vector128<byte> c2 = Sse2.And(a2, Mean16x4Mask); Vector128<int> d1 = Sse2.Add(b1.AsInt32(), c1.AsInt32());
Vector128<byte> c3 = Sse2.And(a3, Mean16x4Mask); Vector128<int> d2 = Sse2.Add(b2.AsInt32(), c2.AsInt32());
Vector128<int> d0 = Sse2.Add(b0.AsInt32(), c0.AsInt32()); Vector128<int> d3 = Sse2.Add(b3.AsInt32(), c3.AsInt32());
Vector128<int> d1 = Sse2.Add(b1.AsInt32(), c1.AsInt32()); Vector128<int> e0 = Sse2.Add(d0, d1);
Vector128<int> d2 = Sse2.Add(b2.AsInt32(), c2.AsInt32()); Vector128<int> e1 = Sse2.Add(d2, d3);
Vector128<int> d3 = Sse2.Add(b3.AsInt32(), c3.AsInt32()); Vector128<int> f0 = Sse2.Add(e0, e1);
Vector128<int> e0 = Sse2.Add(d0, d1); ref ushort outputRef = ref MemoryMarshal.GetReference(tmp);
Vector128<int> e1 = Sse2.Add(d2, d3); Unsafe.As<ushort, Vector128<ushort>>(ref outputRef) = f0.AsUInt16();
Vector128<int> f0 = Sse2.Add(e0, e1);
Sse2.Store(tmpPtr, f0.AsUInt16());
}
#pragma warning restore SA1503 // Braces should not be omitted
dc[0] = (uint)(tmp[1] + tmp[0]); dc[0] = (uint)(tmp[1] + tmp[0]);
dc[1] = (uint)(tmp[3] + tmp[2]); dc[1] = (uint)(tmp[3] + tmp[2]);

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