hg: jdk9/hs-comp/hotspot: 8153713: aarch64: improve short array clearing using store pair

[edward.nevill at gmail.com]

Changeset: f9545cf437eb
Author:    fyang
Date:      2016-04-12 11:53 +0800
URL:       http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/f9545cf437eb

8153713: aarch64: improve short array clearing using store pair
Summary: aarch64: generate store pair instruction to clear short arrays
Reviewed-by: aph

! src/cpu/aarch64/vm/aarch64.ad
! src/cpu/aarch64/vm/globals_aarch64.hpp
! src/cpu/aarch64/vm/macroAssembler_aarch64.cpp
! src/cpu/aarch64/vm/macroAssembler_aarch64.hpp