[jdk11u-dev] RFR: 8248238: Implementation: JEP 388: Windows AArch64 Support [v8]

Wed Nov 3 09:44:13 UTC 2021

On Tue, 2 Nov 2021 08:56:45 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> Reka Kovacs 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 one additional commit since the last revision:
>> 
>>   Backport 9604ee82690f89320614b37bfef4178abc869777
>
> src/hotspot/cpu/aarch64/aarch64.ad line 5436:
> 
>> 5434:   // ARM instructions are of fixed length
>> 5435:   fixed_size_instructions;        // Fixed size instructions TODO does
>> 5436:   max_instructions_per_bundle = 4;   // A53 = 2, A57 = 4
> 
> This looks very odd. What has it got to do with the Windows port?

I don't recall the details, but it was part of the JEP in tip: https://github.com/openjdk/jdk/pull/212/files#diff-018aa61d1a7aafcf70a535fcd40a318a4bd6511fd40ac39ce4be90cc52216749R6297

@mo-beck do you remember the motivation behind this change?

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PR: https://git.openjdk.java.net/jdk11u-dev/pull/301