RFR: 8275448: [REDO] AArch64: Implement string_compare intrinsic in SVE [v3]

[Tobias Hartmann]

On Thu, 11 Nov 2021 02:19:41 GMT, TatWai Chong <duke at openjdk.java.net> wrote:

> They are almost identical except the comparison in the stub code has been changed from "if (!UseSVE)" to "if (UseSVE == 0)". It doesn't mean that is the cause of these failures. The generated codes from Toolchains are different from patch to patch. They should be equivalent but as I'm not familiar macOS toolchain, this change can avoid unnecessary casting from `uint` to `bool`. Please see [UseSVE](https://github.com/openjdk/jdk/blob/673ce7efa56e7eb54266af6fe795d46d57f51bdc/src/hotspot/cpu/aarch64/globals_aarch64.hpp#L101)

I undid that change and re-executed testing. No failures. Integrating this again without knowing the root cause of the previous failures is a bit concerning.

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PR: https://git.openjdk.java.net/jdk/pull/6072