hg: jdk/sandbox: 8211251: Default mask register for avx512 instructions

[chris.hegarty at oracle.com]

Changeset: 390f529f4f22
Author:    kvn
Date:      2018-10-01 11:54 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/390f529f4f22

8211251: Default mask register for avx512 instructions
Summary: Encode AVX 512 instructions as unmasked instruction where mask register is not specified.
Reviewed-by: kvn
Contributed-by: sandhya.viswanathan at intel.com

! src/hotspot/cpu/x86/assembler_x86.cpp
! src/hotspot/cpu/x86/assembler_x86.hpp
! src/hotspot/cpu/x86/macroAssembler_x86.cpp
! src/hotspot/cpu/x86/stubGenerator_x86_32.cpp
! src/hotspot/cpu/x86/stubGenerator_x86_64.cpp
! src/hotspot/cpu/x86/vm_version_x86.cpp