RFR: 8355689: Wrong native entry name for FloatMaxVector vector math stubs with -XX:MaxVectorSize=8

[Vladimir Kozlov]

On Mon, 28 Apr 2025 19:41:28 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

> Both SVML and SLEEF libraries reuse 128-bit versions for vector of 2 floats. Usually, only `Float64Vector` shape satisfies that condiditon, but with`-XX:MaxVectorSize=8` `FloatMaxVector` becomes 2 element vector as well. 
> 
> Adjust the relevant logic to match vector of 2 floats shape structurally. 
> 
> Testing: failing regression test, hs-tier1 - hs-tier4

Good.

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Marked as reviewed by kvn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/24936#pullrequestreview-2801643540