RFR: 8317976: Optimize SIMD sort for AMD Zen 4 [v2]

[Srinivas Vamsi Parasa]

On Mon, 17 Mar 2025 15:28:12 GMT, Rohit Arul Raj <rraj at openjdk.org> wrote:

>> This change enables optimized SIMD sort for AMD Zen 4 (AVX2) & Zen 5 (AVX512).
>> 
>> JTREG Tests: Completed Tier1 & Tier2 tests on Zen4 & Zen5 - No Regressions.
>> 
>> Attaching ArraySort performance data for Zen4 & Zen5.
>> [Zen4-ArraySort-Data.txt](https://github.com/user-attachments/files/19245831/Zen4-ArraySort-Data.txt)
>> [Zen5-ArraySort-Data.txt](https://github.com/user-attachments/files/19245833/Zen5-ArraySort-Data.txt)
>
> Rohit Arul Raj has updated the pull request incrementally with one additional commit since the last revision:
> 
>   create a separate method to check for cpu's supporting avx512 version of simd sort

src/hotspot/cpu/x86/vm_version_x86.hpp line 777:

> 775: 
> 776:   static bool supports_avx512_simd_sort() {
> 777:     //  Disable AVX512 version of SIMD Sort on AMD Zen4 Processors

Looks like you forgot to remove the comment: `// Disable AVX512 version of SIMD Sort on AMD Zen4 Processors`

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PR Review Comment: https://git.openjdk.org/jdk/pull/24053#discussion_r1999244927