hg: hsx/hotspot-comp/hotspot: 8005419: Improve intrinsics code performance on x86 by using AVX2

[vladimir.kozlov at oracle.com]

Changeset: 038dd2875b94
Author:    kvn
Date:      2013-01-08 11:30 -0800
URL:       http://hg.openjdk.java.net/hsx/hotspot-comp/hotspot/rev/038dd2875b94

8005419: Improve intrinsics code performance on x86 by using AVX2
Summary: use 256bit vpxor,vptest instructions in String.compareTo() and equals() intrinsics.
Reviewed-by: twisti

! src/cpu/x86/vm/assembler_x86.cpp
! src/cpu/x86/vm/assembler_x86.hpp
! src/cpu/x86/vm/macroAssembler_x86.cpp
! src/cpu/x86/vm/macroAssembler_x86.hpp
+ test/compiler/8005419/Test8005419.java