[vectorIntrinsics+mask] RFR: 8273371: [Vector API] Crash in Assembler::evpermd when code-gen for masked rearrange operation on AVX512

[Jatin Bhateja]

On Mon, 6 Sep 2021 08:28:34 GMT, Jie Fu <jiefu at openjdk.org> wrote:

> Hi all,
> 
> I'd like to fix the crash in Assembler::evpermd when code-gen for masked int/float rearrange operation on AVX512.
> This is because evpermd can be only used for vector-size-in-bits > 128 [1].
> The fix is disabling the code-gen for int/float if vector-size-in-bits < 256.
> 
> Thanks.
> Best regards,
> Jie
> 
> [1] https://www.felixcloutier.com/x86/vpermd:vpermw

LGTM

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PR: https://git.openjdk.java.net/panama-vector/pull/121