git: openjdk/jdk: 8310159: Bulk copy with Unsafe::arrayCopy is slower compared to memcpy

[Sandhya Viswanathan]

Changeset: 82967f45
Author:    steveatgh <steve.dohrmann at intel.com>
Committer: Sandhya Viswanathan <sviswanathan at openjdk.org>
Date:      2023-11-27 17:35:39 +0000
URL:       https://git.openjdk.org/jdk/commit/82967f45db3b9555be03fcabdba380852ea21e2c

8310159: Bulk copy with Unsafe::arrayCopy is slower compared to memcpy

Co-authored-by: Maurizio Cimadamore <mcimadamore at openjdk.org>
Reviewed-by: thartmann, jbhateja, sviswanathan

! src/hotspot/cpu/x86/assembler_x86.cpp
! src/hotspot/cpu/x86/assembler_x86.hpp
! src/hotspot/cpu/x86/stubGenerator_x86_64.hpp
! src/hotspot/cpu/x86/stubGenerator_x86_64_arraycopy.cpp
+ test/micro/org/openjdk/bench/java/lang/ArrayCopyAlignedLarge.java