[Backport] 8322770: Implement C2 VectorizedHashCode on AArch64

dragonwell-project / dragonwell21

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[Backport] 8322770: Implement C2 VectorizedHashCode on AArch64 #45

Closed JoshuaZhuwj closed 5 months ago

JoshuaZhuwj commented 5 months ago

The code to calculate a hash code consists of two parts: a vectorized loop of Neon instruction that process 4 or 8 elements per iteration depending on the data type and a fully unrolled scalar "loop" that processes up to 7 tail elements.

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