RFR: 8279508: Auto-vectorize Math.round API [v15]

[Jatin Bhateja]

On Mon, 14 Mar 2022 09:29:28 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> Good suggestion, but as of now we are not using vector calling conventions for stubs.
>
> I don't understand this comment. If the stub is only to be used by you, then you can determine your own calling convention.

We are passing mixture of scalar, vector and opmask register to special handling function, only way we can pass them reliably to callee stub without having an elaborate mixed calling convention will be by bounding the machine operands.

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PR: https://git.openjdk.java.net/jdk/pull/7094