hg: jdk8u/jdk8u-dev/hotspot: 8185969: PPC64: Improve VSR support to use up to 64 registers

[gromero at linux.vnet.ibm.com]

Changeset: 846245a33793
Author:    gromero
Date:      2019-06-03 17:16 -0400
URL:       http://hg.openjdk.java.net/jdk8u/jdk8u-dev/hotspot/rev/846245a33793

8185969: PPC64: Improve VSR support to use up to 64 registers
Reviewed-by: mdoerr, goetz
Contributed-by: Gustavo Serra Scalet <gustavo.scalet at eldorado.org.br>, Kazunori Ogata <ogatak at jp.ibm.com>

! src/cpu/ppc/vm/assembler_ppc.hpp
! src/cpu/ppc/vm/assembler_ppc.inline.hpp
! src/cpu/ppc/vm/register_ppc.cpp
! src/cpu/ppc/vm/register_ppc.hpp