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Mark the vectorized CRC update methods noinline #118544

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Merged
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Aug 8, 2025
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Mark the vectorized CRC update methods noinline #118544

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4 changes: 4 additions & 0 deletions src/libraries/System.IO.Hashing/src/System/IO/Hashing/Crc32.Vectorized.cs
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Expand Up @@ -29,6 +29,10 @@ private static bool CanBeVectorized(ReadOnlySpan<byte> source) =>
// Computation for Generic Polynomials Using PCLMULQDQ Instruction" in December, 2009.
// https://github.com/intel/isa-l/blob/33a2d9484595c2d6516c920ce39a694c144ddf69/crc/crc32_ieee_by4.asm
// https://github.com/SixLabors/ImageSharp/blob/f4f689ce67ecbcc35cebddba5aacb603e6d1068a/src/ImageSharp/Formats/Png/Zlib/Crc32.cs#L80
//
// Marking this as noinline so the JIT doesn't try and inline this and end up not inlining some of the calls it makes.
//
[MethodImpl(MethodImplOptions.NoInlining)]
private static uint UpdateVectorized(uint crc, ReadOnlySpan<byte> source)
{
Debug.Assert(CanBeVectorized(source), "source cannot be vectorized.");
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4 changes: 4 additions & 0 deletions src/libraries/System.IO.Hashing/src/System/IO/Hashing/Crc64.Vectorized.cs
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Expand Up @@ -43,6 +43,10 @@ private static Vector128<ulong> LoadFromSource(ref byte source, nuint elementOff
// "Fast CRC Computation for Generic Polynomials Using PCLMULQDQ Instruction" in December, 2009 and the
// Intel reference implementation.
// https://github.com/intel/isa-l/blob/33a2d9484595c2d6516c920ce39a694c144ddf69/crc/crc64_ecma_norm_by8.asm
//
// Marking this as noinline so the JIT doesn't try and inline this and end up not inlining some of the calls it makes.
//
[MethodImpl(MethodImplOptions.NoInlining)]
private static ulong UpdateVectorized(ulong crc, ReadOnlySpan<byte> source)
{
Debug.Assert(CanBeVectorized(source), "source cannot be vectorized.");
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