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/stubGenerator_x86_64.cpp line 4318:

> 4316:   // Load x86_64_sort library on supported hardware to enable SIMD sort and partition intrinsics
> 4317: 
> 4318:   if (VM_Version::supports_avx512dq() || VM_Version::supports_avx2()) {

Shouldn't you check for `VM_Version::supports_avx512_simd_sort()` here as well?

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PR Review Comment: https://git.openjdk.org/jdk/pull/24053#discussion_r1999252275