RFR: 8268231: Aarch64: Use ldp in intrinsics for String.compareTo [v5]

[Wu Yan]

On Wed, 4 Aug 2021 03:27:49 GMT, Nick Gasson <ngasson at openjdk.org> wrote:

>> Wang Huang has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains six additional commits since the last revision:
>> 
>>  - fix bugs
>>  - Merge branch 'master' of https://gitee.com/ustc-wh/jdk into JDK-8268231
>>  - fix style and add unalign test case
>>  - refact codes
>>  - draft of refactor
>>  - 8268231: Aarch64: Use ldp in intrinsics for String.compareTo
>
> src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp line 4892:
> 
>> 4890:           __ cmp(tmp1, tmp2);
>> 4891:           __ ccmp(tmp1h, tmp2h, 0, Assembler::EQ);
>> 4892:           __ br(__ NE, DIFF);
> 
> The line above uses `Assembler::EQ` for the condition code but this line uses `__ NE`. Better to be consistent and use `Assembler::` everywhere.

Thanks, I'll fix it.

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PR: https://git.openjdk.java.net/jdk/pull/4722