[vectorIntrinsics] RFR: 8262275: Math vector stubs are not called for double64 vectors

[Jie Fu]

On Thu, 4 Mar 2021 01:09:18 GMT, Sandhya Viswanathan <sviswanathan at openjdk.org> wrote:

> @DamonFool Would T_LONG also benefit from similar change?

Thanks @sviswa7 for your review.

Yes.
But since there is no svml support for T_LONG, I'd like to support more Double64 and Long64 vectorization after this PR.
Thanks.

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PR: https://git.openjdk.java.net/panama-vector/pull/39