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Use ROS trick all round and optimize Shuffle3

js/color-alpha-handling
James Jackson-South 5 years ago
parent
85ec6da5d2
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699d8ff01d
1 changed files with 20 additions and 16 deletions
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  1. 36
      src/ImageSharp/Common/Helpers/SimdUtils.HwIntrinsics.cs

36
src/ImageSharp/Common/Helpers/SimdUtils.HwIntrinsics.cs
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@ -18,6 +18,10 @@ namespace SixLabors.ImageSharp
public static ReadOnlySpan<byte> PermuteMaskEvenOdd8x32 => new byte[] { 0, 0, 0, 0, 2, 0, 0, 0, 4, 0, 0, 0, 6, 0, 0, 0, 1, 0, 0, 0, 3, 0, 0, 0, 5, 0, 0, 0, 7, 0, 0, 0 };
private static ReadOnlySpan<byte> ShuffleMaskPad4Nx16 => new byte[] { 0, 1, 2, 0x80, 3, 4, 5, 0x80, 6, 7, 8, 0x80, 9, 10, 11, 0x80 };
private static ReadOnlySpan<byte> ShuffleMaskSlice4Nx16 => new byte[] { 0, 1, 2, 4, 5, 6, 8, 9, 10, 12, 13, 14, 0x80, 0x80, 0x80, 0x80 };
/// <summary>
/// Shuffle single-precision (32-bit) floating-point elements in <paramref name="source"/>
/// using the control and store the results in <paramref name="dest"/>.
@ -352,10 +356,12 @@ namespace SixLabors.ImageSharp
{
if (Ssse3.IsSupported)
{
Vector128<byte> vmask = Vector128.Create(0, 1, 2, 0x80, 3, 4, 5, 0x80, 6, 7, 8, 0x80, 9, 10, 11, 0x80).AsByte();
ref byte vmaskBase = ref MemoryMarshal.GetReference(ShuffleMaskPad4Nx16);
Vector128<byte> vmask = Unsafe.As<byte, Vector128<byte>>(ref vmaskBase);
Vector128<byte> vfill = Vector128.Create(0xff000000ff000000ul).AsByte();
Vector128<byte> vmasko = Vector128.Create(0, 1, 2, 4, 5, 6, 8, 9, 10, 12, 13, 14, 3, 7, 11, 15).AsByte();
Vector128<byte> vmaske = Ssse3.AlignRight(vmasko, vmasko, 12).AsByte();
ref byte vmaskoBase = ref MemoryMarshal.GetReference(ShuffleMaskSlice4Nx16);
Vector128<byte> vmasko = Unsafe.As<byte, Vector128<byte>>(ref vmaskoBase);
Vector128<byte> vmaske = Ssse3.AlignRight(vmasko, vmasko, 12);
Span<byte> bytes = stackalloc byte[Vector128<byte>.Count];
Shuffle.MmShuffleSpan(ref bytes, control);
@ -381,10 +387,10 @@ namespace SixLabors.ImageSharp
v2 = Ssse3.AlignRight(v2, v1, 8);
v1 = Ssse3.AlignRight(v1, v0, 12);
v0 = Ssse3.Shuffle(Sse2.Or(Ssse3.Shuffle(v0, vmask), vfill), vshuffle);
v1 = Ssse3.Shuffle(Sse2.Or(Ssse3.Shuffle(v1, vmask), vfill), vshuffle);
v2 = Ssse3.Shuffle(Sse2.Or(Ssse3.Shuffle(v2, vmask), vfill), vshuffle);
v3 = Ssse3.Shuffle(Sse2.Or(Ssse3.Shuffle(v3, vmask), vfill), vshuffle);
v0 = Ssse3.Shuffle(Ssse3.Shuffle(v0, vmask), vshuffle);
v1 = Ssse3.Shuffle(Ssse3.Shuffle(v1, vmask), vshuffle);
v2 = Ssse3.Shuffle(Ssse3.Shuffle(v2, vmask), vshuffle);
v3 = Ssse3.Shuffle(Ssse3.Shuffle(v3, vmask), vshuffle);
v0 = Ssse3.Shuffle(v0, vmaske);
v1 = Ssse3.Shuffle(v1, vmasko);
@ -392,12 +398,8 @@ namespace SixLabors.ImageSharp
v3 = Ssse3.Shuffle(v3, vmasko);
v0 = Ssse3.AlignRight(v1, v0, 4);
v3 = Ssse3.AlignRight(v3, v2, 12);
v1 = Sse2.ShiftLeftLogical128BitLane(v1, 4);
v2 = Sse2.ShiftRightLogical128BitLane(v2, 4);
v1 = Ssse3.AlignRight(v2, v1, 8);
v1 = Sse2.Or(Sse2.ShiftRightLogical128BitLane(v1, 4), Sse2.ShiftLeftLogical128BitLane(v2, 4));
v2 = Ssse3.AlignRight(v3, v2, 12);
ref Vector128<byte> vd = ref Unsafe.Add(ref destBase, i);
@ -416,7 +418,8 @@ namespace SixLabors.ImageSharp
{
if (Ssse3.IsSupported)
{
Vector128<byte> vmask = Vector128.Create(0, 1, 2, 0x80, 3, 4, 5, 0x80, 6, 7, 8, 0x80, 9, 10, 11, 0x80).AsByte();
ref byte vmaskBase = ref MemoryMarshal.GetReference(ShuffleMaskPad4Nx16);
Vector128<byte> vmask = Unsafe.As<byte, Vector128<byte>>(ref vmaskBase);
Vector128<byte> vfill = Vector128.Create(0xff000000ff000000ul).AsByte();
Span<byte> bytes = stackalloc byte[Vector128<byte>.Count];
@ -459,8 +462,9 @@ namespace SixLabors.ImageSharp
{
if (Ssse3.IsSupported)
{
Vector128<byte> vmasko = Vector128.Create(0, 1, 2, 4, 5, 6, 8, 9, 10, 12, 13, 14, 3, 7, 11, 15).AsByte();
Vector128<byte> vmaske = Ssse3.AlignRight(vmasko, vmasko, 12).AsByte();
ref byte vmaskoBase = ref MemoryMarshal.GetReference(ShuffleMaskSlice4Nx16);
Vector128<byte> vmasko = Unsafe.As<byte, Vector128<byte>>(ref vmaskoBase);
Vector128<byte> vmaske = Ssse3.AlignRight(vmasko, vmasko, 12);
Span<byte> bytes = stackalloc byte[Vector128<byte>.Count];
Shuffle.MmShuffleSpan(ref bytes, control);

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