RFR: 8374349: [VectorAPI]: AArch64: Prefer merging mode SVE CPY instruction

[Fei Gao]

On Thu, 22 Jan 2026 12:43:58 GMT, Eric Fang <erfang at openjdk.org> wrote:

> Hi @fg1417, this PR optimizes the use of the `sve cpy (imm, zeroing)` instruction. I have confirmed this optimization on Neoverse-V1/V2, but I don't have any more AArch64 testing environments, so I'm not sure if this optimization can be applied to more environments. Do you have more testing environments ? If so, could you help me test and review this PR? Thanks!

Hi @erifan, thanks for your work! Sure, I’m happy to test it. I’ll get back to you once I have the results.

-------------

PR Comment: https://git.openjdk.org/jdk/pull/29359#issuecomment-3785525633