hg: panama/dev: Add Vector API mask support and comparisons for all data types for AArch64 NEON

[ningsheng.jian at arm.com]

Changeset: 3430ad34ce16
Author:    yzhang
Date:      2018-12-07 10:38 +0800
URL:       http://hg.openjdk.java.net/panama/dev/rev/3430ad34ce16

Add Vector API mask support and comparisons for all data types for AArch64 NEON
Summary: Add loadmask/bsl/storemask instructions to implement mask support in AArch64 backend.
And add compare eq/ne/lt/le/gt/ge instructions to generate mask in AArch64 backend.

! src/hotspot/cpu/aarch64/aarch64.ad
! src/hotspot/cpu/aarch64/assembler_aarch64.hpp