hg: jdk/jdk: 8241874: [PPC64]: Improve performance of Long.reverseBytes() and Integer.reverseBytes() on Power9

[horie at jp.ibm.com]

Changeset: 866b66895c27
Author:    mhorie
Date:      2020-04-22 02:30 -0500
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/866b66895c27

8241874: [PPC64]: Improve performance of Long.reverseBytes() and Integer.reverseBytes() on Power9
Reviewed-by: mdoerr, mhorie
Contributed-by: cjashfor at linux.ibm.com

! src/hotspot/cpu/ppc/assembler_ppc.hpp
! src/hotspot/cpu/ppc/assembler_ppc.inline.hpp
! src/hotspot/cpu/ppc/globals_ppc.hpp
! src/hotspot/cpu/ppc/ppc.ad
! src/hotspot/cpu/ppc/vm_version_ppc.cpp