hg: jdk9/hs-gc/hotspot: 8058255: Native jbyte Atomic::cmpxchg for supported x86 platforms

[jesper.wilhelmsson at oracle.com]

Changeset: 5398ffa1a419
Author:    jwilhelm
Date:      2014-10-21 15:07 +0200
URL:       http://hg.openjdk.java.net/jdk9/hs-gc/hotspot/rev/5398ffa1a419

8058255: Native jbyte Atomic::cmpxchg for supported x86 platforms
Summary: Use the native cmpxchgb instruction on x86.
Reviewed-by: dholmes, kbarrett, phh
Contributed-by: erik.osterlund at lnu.se

! src/cpu/sparc/vm/stubGenerator_sparc.cpp
! src/cpu/x86/vm/assembler_x86.cpp
! src/cpu/x86/vm/assembler_x86.hpp
! src/cpu/x86/vm/stubGenerator_x86_64.cpp
! src/cpu/zero/vm/stubGenerator_zero.cpp
! src/os_cpu/bsd_x86/vm/atomic_bsd_x86.inline.hpp
! src/os_cpu/linux_x86/vm/atomic_linux_x86.inline.hpp
! src/os_cpu/solaris_x86/vm/atomic_solaris_x86.inline.hpp
! src/os_cpu/solaris_x86/vm/solaris_x86_32.il
! src/os_cpu/solaris_x86/vm/solaris_x86_64.il
! src/os_cpu/windows_x86/vm/atomic_windows_x86.inline.hpp
! src/os_cpu/windows_x86/vm/os_windows_x86.cpp
! src/os_cpu/windows_x86/vm/os_windows_x86.hpp
! src/share/vm/runtime/atomic.cpp
! src/share/vm/runtime/atomic.hpp
! src/share/vm/runtime/atomic.inline.hpp
! src/share/vm/runtime/stubRoutines.cpp
! src/share/vm/runtime/stubRoutines.hpp