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Type: Enhancement
Resolution: Fixed
Priority: P4
Fix Version/s: 18
Affects Version/s: 17, 18
Component/s: hotspot
Labels:

Subcomponent:
compiler
Resolved In Build:
b19
CPU:

aarch64
OS:

generic

Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-8282781	17.0.4-oracle	Tobias Hartmann	P4	Resolved	Fixed	b01
JDK-8282634	17.0.4	Dmitry Chuyko	P4	Resolved	Fixed	b01

We can use `ldp` instructions to improve the perfomance of C2_MacroAssembler::string_compare which is an intrinsic for String.compareTo. Let's do that.

backported by

JDK-8282634 Aarch64: Use Ldp in intrinsics for String.compareTo

Resolved

JDK-8282781 Aarch64: Use Ldp in intrinsics for String.compareTo

Resolved

relates to

JDK-8279560 AArch64: generate_compare_long_string_same_encoding and LARGE_LOOP_PREFETCH alignment

Resolved

links to

Commit openjdk/jdk17u-dev/dd83c4e7

Commit openjdk/jdk/6d1d4d52

Review openjdk/jdk17u-dev/91

Review openjdk/jdk/4722

(2 links to)

Assignee:: Wang Huang

Reporter:: Wang Huang

Votes:: 0 Vote for this issue

Watchers:: 8 Start watching this issue

Created:: 2021-06-03 20:06

Updated:: 2022-03-07 23:15

Resolved:: 2021-10-09 01:19

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