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[Backport] part of 8261553, 8262355 #703

Merged
merged 4 commits into from
Nov 2, 2023
Merged

[Backport] part of 8261553, 8262355 #703

merged 4 commits into from
Nov 2, 2023

Commits on Oct 30, 2023

  1. [Backport] 8261553: Efficient mask generation using BMI2 BZHI instruc… 

    …tion

Summary: [Backport] 8261553: Efficient mask generation using BMI2 BZHI instruction

Test Plan: ci jtreg

Reviewed-by: JoshuaZhuwj

Issue: dragonwell-project#690
    @JinZhonghui
    JinZhonghui committed Oct 30, 2023
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  2. [Backport] 8262355: Support for AVX-512 opmask register allocation. 

    Summary: 8262355: Support for AVX-512 opmask register allocation.

Test Plan: ci jtreg

Reviewed-by: JoshuaZhuwj

Issue: dragonwell-project#607
    @JinZhonghui
    JinZhonghui committed Oct 30, 2023
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Commits on Nov 1, 2023

  1. Remove clear_mem and Op_ClearArray related changes 

    Summary: I'd like not to backport 8257772: Vectorizing clear memory operation using AVX-512 masked operations,
hence clear_mem and Op_ClearArray related changes are removed from 8262355
    @JoshuaZhuwj
    JoshuaZhuwj committed Nov 1, 2023
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Commits on Nov 2, 2023

  1. Support the automatic init of K register mask by JVM options 

    Summary: Introduce "reg_mask_init" in x86 platform.
    @JoshuaZhuwj
    JoshuaZhuwj committed Nov 2, 2023
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