src/hotspot/os_cpu/linux_arm/atomic_linux_arm.hpp

rev 49898 : 8202080: Introduce ordering semantics for Atomic::add and other RMW atomics
Reviewed-by:

*** 1,7 ****
  /*
!  * Copyright (c) 2008, 2017, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
--- 1,7 ----
  /*
!  * Copyright (c) 2008, 2018, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
*** 79,94 ****
  template<size_t byte_size>
  struct Atomic::PlatformAdd
    : Atomic::AddAndFetch<Atomic::PlatformAdd<byte_size> >
  {
    template<typename I, typename D>
!   D add_and_fetch(I add_value, D volatile* dest) const;
  };
  
  template<>
  template<typename I, typename D>
! inline D Atomic::PlatformAdd<4>::add_and_fetch(I add_value, D volatile* dest) const {
    STATIC_ASSERT(4 == sizeof(I));
    STATIC_ASSERT(4 == sizeof(D));
  #ifdef AARCH64
    D val;
    int tmp;
--- 79,95 ----
  template<size_t byte_size>
  struct Atomic::PlatformAdd
    : Atomic::AddAndFetch<Atomic::PlatformAdd<byte_size> >
  {
    template<typename I, typename D>
!   D add_and_fetch(I add_value, D volatile* dest, atomic_memory_order order) const;
  };
  
  template<>
  template<typename I, typename D>
! inline D Atomic::PlatformAdd<4>::add_and_fetch(I add_value, D volatile* dest,
!                                                atomic_memory_order order) const {
    STATIC_ASSERT(4 == sizeof(I));
    STATIC_ASSERT(4 == sizeof(D));
  #ifdef AARCH64
    D val;
    int tmp;
*** 108,118 ****
  }
  
  #ifdef AARCH64
  template<>
  template<typename I, typename D>
! inline D Atomic::PlatformAdd<8>::add_and_fetch(I add_value, D volatile* dest) const {
    STATIC_ASSERT(8 == sizeof(I));
    STATIC_ASSERT(8 == sizeof(D));
    D val;
    int tmp;
    __asm__ volatile(
--- 109,120 ----
  }
  
  #ifdef AARCH64
  template<>
  template<typename I, typename D>
! inline D Atomic::PlatformAdd<8>::add_and_fetch(I add_value, D volatile* dest,
!                                                atomic_memory_order order) const {
    STATIC_ASSERT(8 == sizeof(I));
    STATIC_ASSERT(8 == sizeof(D));
    D val;
    int tmp;
    __asm__ volatile(
*** 129,139 ****
  #endif
  
  template<>
  template<typename T>
  inline T Atomic::PlatformXchg<4>::operator()(T exchange_value,
!                                              T volatile* dest) const {
    STATIC_ASSERT(4 == sizeof(T));
  #ifdef AARCH64
    T old_val;
    int tmp;
    __asm__ volatile(
--- 131,142 ----
  #endif
  
  template<>
  template<typename T>
  inline T Atomic::PlatformXchg<4>::operator()(T exchange_value,
!                                              T volatile* dest,
!                                              atomic_memory_order order) const {
    STATIC_ASSERT(4 == sizeof(T));
  #ifdef AARCH64
    T old_val;
    int tmp;
    __asm__ volatile(
*** 152,162 ****
  
  #ifdef AARCH64
  template<>
  template<typename T>
  inline T Atomic::PlatformXchg<8>::operator()(T exchange_value,
!                                              T volatile* dest) const {
    STATIC_ASSERT(8 == sizeof(T));
    T old_val;
    int tmp;
    __asm__ volatile(
      "1:\n\t"
--- 155,166 ----
  
  #ifdef AARCH64
  template<>
  template<typename T>
  inline T Atomic::PlatformXchg<8>::operator()(T exchange_value,
!                                              T volatile* dest,
!                                              atomic_memory_order order) const {
    STATIC_ASSERT(8 == sizeof(T));
    T old_val;
    int tmp;
    __asm__ volatile(
      "1:\n\t"
*** 198,208 ****
  template<>
  template<typename T>
  inline T Atomic::PlatformCmpxchg<4>::operator()(T exchange_value,
                                                  T volatile* dest,
                                                  T compare_value,
!                                                 cmpxchg_memory_order order) const {
    STATIC_ASSERT(4 == sizeof(T));
  #ifdef AARCH64
    T rv;
    int tmp;
    __asm__ volatile(
--- 202,212 ----
  template<>
  template<typename T>
  inline T Atomic::PlatformCmpxchg<4>::operator()(T exchange_value,
                                                  T volatile* dest,
                                                  T compare_value,
!                                                 atomic_memory_order order) const {
    STATIC_ASSERT(4 == sizeof(T));
  #ifdef AARCH64
    T rv;
    int tmp;
    __asm__ volatile(
*** 228,238 ****
  template<>
  template<typename T>
  inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value,
                                                  T volatile* dest,
                                                  T compare_value,
!                                                 cmpxchg_memory_order order) const {
    STATIC_ASSERT(8 == sizeof(T));
  #ifdef AARCH64
    T rv;
    int tmp;
    __asm__ volatile(
--- 232,242 ----
  template<>
  template<typename T>
  inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value,
                                                  T volatile* dest,
                                                  T compare_value,
!                                                 atomic_memory_order order) const {
    STATIC_ASSERT(8 == sizeof(T));
  #ifdef AARCH64
    T rv;
    int tmp;
    __asm__ volatile(