hg: jdk9/hs-comp/hotspot: 8147844: new method j.l.Runtime.onSpinWait() and the corresponding x86 hotspot instrinsic

[paul.sandoz at oracle.com]

Changeset: a7aa11177232
Author:    ikrylov
Date:      2016-03-30 17:04 +0200
URL:       http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/a7aa11177232

8147844: new method j.l.Runtime.onSpinWait() and the corresponding x86 hotspot instrinsic
Summary: adds c1 & c2 x86 intrinsics for j.l.Runtime.onSpinWait() that utilize the PAUSE instruction
Reviewed-by: iveresov, kvn
Contributed-by: Ivan Krylov <ivan at azul.com>, Yuri Gaevsky <ygaevsky at azul.com>

! src/cpu/aarch64/vm/c1_LIRAssembler_aarch64.cpp
! src/cpu/ppc/vm/c1_LIRAssembler_ppc.cpp
! src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp
! src/cpu/x86/vm/c1_LIRAssembler_x86.cpp
! src/cpu/x86/vm/vm_version_x86.hpp
! src/cpu/x86/vm/x86.ad
! src/share/vm/c1/c1_Compiler.cpp
! src/share/vm/c1/c1_LIR.cpp
! src/share/vm/c1/c1_LIR.hpp
! src/share/vm/c1/c1_LIRAssembler.cpp
! src/share/vm/c1/c1_LIRAssembler.hpp
! src/share/vm/c1/c1_LIRGenerator.cpp
! src/share/vm/classfile/vmSymbols.hpp
! src/share/vm/opto/c2compiler.cpp
! src/share/vm/opto/classes.hpp
! src/share/vm/opto/library_call.cpp
! src/share/vm/opto/matcher.cpp
! src/share/vm/opto/memnode.cpp
! src/share/vm/opto/memnode.hpp
! src/share/vm/runtime/vmStructs.cpp
! src/share/vm/runtime/vm_version.hpp
+ test/compiler/onSpinWait/TestOnSpinWait.java