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Add sse2 version of inverse transform #1819

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merged 15 commits into from
Nov 14, 2021
Merged

Add sse2 version of inverse transform #1819

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6e8def1
Add sse2 version of inverse transform
brianpopow Nov 10, 2021
26d3063
Merge remote-tracking branch 'origin/master' into bp/itransformsse
brianpopow Nov 10, 2021
835ecea
Store only eight bytes per line
brianpopow Nov 11, 2021
5968de8
Add sse tests for inverse transform
brianpopow Nov 11, 2021
5c0b598
Fix copy paste mistake
brianpopow Nov 11, 2021
b6a20af
Merge branch 'master' into bp/itransformsse
JimBobSquarePants Nov 11, 2021
6039d2a
Better test case
brianpopow Nov 11, 2021
abcbc4c
Fix issue: vectors need to be short type
brianpopow Nov 11, 2021
18ecb06
Add tests for executing only one transform
brianpopow Nov 11, 2021
6e548b5
Remove unnecessary casts
brianpopow Nov 11, 2021
a201e8a
Avoid pinning
brianpopow Nov 11, 2021
b7059ae
Add [MethodImpl(InliningOptions.ShortMethod)]
brianpopow Nov 12, 2021
544319e
ITransform now always does two transforms
brianpopow Nov 12, 2021
5074ee6
Refactor: extract horizontal and vertical pass into methods
brianpopow Nov 12, 2021
16bb94f
Merge branch 'master' into bp/itransformsse
brianpopow Nov 14, 2021
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61 changes: 39 additions & 22 deletions src/ImageSharp/Formats/Webp/Lossy/LossyUtils.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -704,28 +704,7 @@ public static int TTransformSse41(Span<byte> inputA, Span<byte> inputB, Span<ush
// a20 a21 a22 a23 b20 b21 b22 b23
// a30 a31 a32 a33 b30 b31 b32 b33
// Transpose the two 4x4.
Vector128<short> transpose00 = Sse2.UnpackLow(b0, b1);
Vector128<short> transpose01 = Sse2.UnpackLow(b2, b3);
Vector128<short> transpose02 = Sse2.UnpackHigh(b0, b1);
Vector128<short> transpose03 = Sse2.UnpackHigh(b2, b3);

// a00 a10 a01 a11 a02 a12 a03 a13
// a20 a30 a21 a31 a22 a32 a23 a33
// b00 b10 b01 b11 b02 b12 b03 b13
// b20 b30 b21 b31 b22 b32 b23 b33
Vector128<int> transpose10 = Sse2.UnpackLow(transpose00.AsInt32(), transpose01.AsInt32());
Vector128<int> transpose11 = Sse2.UnpackLow(transpose02.AsInt32(), transpose03.AsInt32());
Vector128<int> transpose12 = Sse2.UnpackHigh(transpose00.AsInt32(), transpose01.AsInt32());
Vector128<int> transpose13 = Sse2.UnpackHigh(transpose02.AsInt32(), transpose03.AsInt32());

// a00 a10 a20 a30 a01 a11 a21 a31
// b00 b10 b20 b30 b01 b11 b21 b31
// a02 a12 a22 a32 a03 a13 a23 a33
// b02 b12 a22 b32 b03 b13 b23 b33
Vector128<long> output0 = Sse2.UnpackLow(transpose10.AsInt64(), transpose11.AsInt64());
Vector128<long> output1 = Sse2.UnpackHigh(transpose10.AsInt64(), transpose11.AsInt64());
Vector128<long> output2 = Sse2.UnpackLow(transpose12.AsInt64(), transpose13.AsInt64());
Vector128<long> output3 = Sse2.UnpackHigh(transpose12.AsInt64(), transpose13.AsInt64());
Vp8Transpose_2_4x4_16b(b0, b1, b2, b3, out Vector128<long> output0, out Vector128<long> output1, out Vector128<long> output2, out Vector128<long> output3);

// a00 a10 a20 a30 b00 b10 b20 b30
// a01 a11 a21 a31 b01 b11 b21 b31
Expand Down Expand Up @@ -769,6 +748,44 @@ public static int TTransformSse41(Span<byte> inputA, Span<byte> inputB, Span<ush

return Numerics.ReduceSum(result);
}

// Transpose two 4x4 16b matrices horizontally stored in registers.
[MethodImpl(InliningOptions.ShortMethod)]
public static void Vp8Transpose_2_4x4_16b(Vector128<short> b0, Vector128<short> b1, Vector128<short> b2, Vector128<short> b3, out Vector128<long> output0, out Vector128<long> output1, out Vector128<long> output2, out Vector128<long> output3)
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{
// Transpose the two 4x4.
// a00 a01 a02 a03 b00 b01 b02 b03
// a10 a11 a12 a13 b10 b11 b12 b13
// a20 a21 a22 a23 b20 b21 b22 b23
// a30 a31 a32 a33 b30 b31 b32 b33
Vector128<short> transpose00 = Sse2.UnpackLow(b0, b1);
Vector128<short> transpose01 = Sse2.UnpackLow(b2, b3);
Vector128<short> transpose02 = Sse2.UnpackHigh(b0, b1);
Vector128<short> transpose03 = Sse2.UnpackHigh(b2, b3);

// a00 a10 a01 a11 a02 a12 a03 a13
// a20 a30 a21 a31 a22 a32 a23 a33
// b00 b10 b01 b11 b02 b12 b03 b13
// b20 b30 b21 b31 b22 b32 b23 b33
Vector128<int> transpose10 = Sse2.UnpackLow(transpose00.AsInt32(), transpose01.AsInt32());
Vector128<int> transpose11 = Sse2.UnpackLow(transpose02.AsInt32(), transpose03.AsInt32());
Vector128<int> transpose12 = Sse2.UnpackHigh(transpose00.AsInt32(), transpose01.AsInt32());
Vector128<int> transpose13 = Sse2.UnpackHigh(transpose02.AsInt32(), transpose03.AsInt32());

// a00 a10 a20 a30 a01 a11 a21 a31
// b00 b10 b20 b30 b01 b11 b21 b31
// a02 a12 a22 a32 a03 a13 a23 a33
// b02 b12 a22 b32 b03 b13 b23 b33
output0 = Sse2.UnpackLow(transpose10.AsInt64(), transpose11.AsInt64());
output1 = Sse2.UnpackHigh(transpose10.AsInt64(), transpose11.AsInt64());
output2 = Sse2.UnpackLow(transpose12.AsInt64(), transpose13.AsInt64());
output3 = Sse2.UnpackHigh(transpose12.AsInt64(), transpose13.AsInt64());

// a00 a10 a20 a30 b00 b10 b20 b30
// a01 a11 a21 a31 b01 b11 b21 b31
// a02 a12 a22 a32 b02 b12 b22 b32
// a03 a13 a23 a33 b03 b13 b23 b33
}
#endif

public static void TransformTwo(Span<short> src, Span<byte> dst, Span<int> scratch)
Expand Down
6 changes: 3 additions & 3 deletions src/ImageSharp/Formats/Webp/Lossy/QuantEnc.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -329,7 +329,7 @@ public static int ReconstructIntra16(Vp8EncIterator it, Vp8SegmentInfo dqm, Vp8M
LossyUtils.TransformWht(dcTmp, tmp, scratch);
for (n = 0; n < 16; n += 2)
{
Vp8Encoding.ITransform(reference.Slice(WebpLookupTables.Vp8Scan[n]), tmp.Slice(n * 16, 32), yuvOut.Slice(WebpLookupTables.Vp8Scan[n]), true, scratch);
Vp8Encoding.ITransform(reference.Slice(WebpLookupTables.Vp8Scan[n]), tmp.Slice(n * 16, 32), yuvOut.Slice(WebpLookupTables.Vp8Scan[n]), scratch);
}

return nz;
Expand All @@ -342,7 +342,7 @@ public static int ReconstructIntra4(Vp8EncIterator it, Vp8SegmentInfo dqm, Span<
Span<int> scratch = it.Scratch3.AsSpan(0, 16);
Vp8Encoding.FTransform(src, reference, tmp, scratch);
int nz = QuantizeBlock(tmp, levels, ref dqm.Y1);
Vp8Encoding.ITransform(reference, tmp, yuvOut, false, scratch);
Vp8Encoding.ITransformOne(reference, tmp, yuvOut, scratch);

return nz;
}
Expand Down Expand Up @@ -375,7 +375,7 @@ public static int ReconstructUv(Vp8EncIterator it, Vp8SegmentInfo dqm, Vp8ModeSc

for (n = 0; n < 8; n += 2)
{
Vp8Encoding.ITransform(reference.Slice(WebpLookupTables.Vp8ScanUv[n]), tmp.Slice(n * 16, 32), yuvOut.Slice(WebpLookupTables.Vp8ScanUv[n]), true, scratch);
Vp8Encoding.ITransform(reference.Slice(WebpLookupTables.Vp8ScanUv[n]), tmp.Slice(n * 16, 32), yuvOut.Slice(WebpLookupTables.Vp8ScanUv[n]), scratch);
}

return nz << 16;
Expand Down
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