Integrated: 8367611: Enable vblendvp[sd] on Future ECore

[Mohamed Issa]

On Wed, 17 Sep 2025 20:58:06 GMT, Mohamed Issa <missa at openjdk.org> wrote:

> The upcoming ECore platforms will benefit from using `vblendvps` and `vblendvpd` instructions when the destination register is the same as the source register. This change takes that situation into account.
> 
> The JTREG test shown below was used to verify correctness against the [OpenJDK v26-b15](https://github.com/openjdk/jdk/releases/tag/jdk-26%2B15) baseline build. This test frequently calls vblendvps() and vblendvpd() in the macro assembler. On Darkmont and non-Darkmont cores, the right code paths are followed when checking with asserts.
> 
> 1. `jtreg:test/hotspot/jtreg/compiler/intrinsics/math/TestSignumIntrinsic.java`

This pull request has now been integrated.

Changeset: f68cba3d
Author:    Mohamed Issa <missa at openjdk.org>
Committer: Sandhya Viswanathan <sviswanathan at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/f68cba3d2fe3554c3cf0c3edf60ab639d6b13a6f
Stats:     10 lines in 3 files changed: 8 ins; 0 del; 2 mod

8367611: Enable vblendvp[sd] on Future ECore

Reviewed-by: mhaessig, sviswanathan, vpaprotski

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PR: https://git.openjdk.org/jdk/pull/27354