src/hotspot/os_cpu/linux_x86/atomic_linux_x86.hpp

rev 49845 : 8202080: Introduce ordering semantics for Atomic::add
Reviewed-by:

*** 30,45 ****
  template<size_t byte_size>
  struct Atomic::PlatformAdd
    : Atomic::FetchAndAdd<Atomic::PlatformAdd<byte_size> >
  {
    template<typename I, typename D>
!   D fetch_and_add(I add_value, D volatile* dest) const;
  };
  
  template<>
  template<typename I, typename D>
! inline D Atomic::PlatformAdd<4>::fetch_and_add(I add_value, D volatile* dest) const {
    STATIC_ASSERT(4 == sizeof(I));
    STATIC_ASSERT(4 == sizeof(D));
    D old_value;
    __asm__ volatile (  "lock xaddl %0,(%2)"
                      : "=r" (old_value)
--- 30,46 ----
  template<size_t byte_size>
  struct Atomic::PlatformAdd
    : Atomic::FetchAndAdd<Atomic::PlatformAdd<byte_size> >
  {
    template<typename I, typename D>
!   D fetch_and_add(I add_value, D volatile* dest, cmpxchg_memory_order order) const;
  };
  
  template<>
  template<typename I, typename D>
! inline D Atomic::PlatformAdd<4>::fetch_and_add(I add_value, D volatile* dest,
!                                                cmpxchg_memory_order order) const {
    STATIC_ASSERT(4 == sizeof(I));
    STATIC_ASSERT(4 == sizeof(D));
    D old_value;
    __asm__ volatile (  "lock xaddl %0,(%2)"
                      : "=r" (old_value)
*** 90,100 ****
  
  #ifdef AMD64
  
  template<>
  template<typename I, typename D>
! inline D Atomic::PlatformAdd<8>::fetch_and_add(I add_value, D volatile* dest) const {
    STATIC_ASSERT(8 == sizeof(I));
    STATIC_ASSERT(8 == sizeof(D));
    D old_value;
    __asm__ __volatile__ ("lock xaddq %0,(%2)"
                          : "=r" (old_value)
--- 91,102 ----
  
  #ifdef AMD64
  
  template<>
  template<typename I, typename D>
! inline D Atomic::PlatformAdd<8>::fetch_and_add(I add_value, D volatile* dest,
!                                                cmpxchg_memory_order order) const {
    STATIC_ASSERT(8 == sizeof(I));
    STATIC_ASSERT(8 == sizeof(D));
    D old_value;
    __asm__ __volatile__ ("lock xaddq %0,(%2)"
                          : "=r" (old_value)
*** 103,114 ****
    return old_value;
  }
  
  template<>
  template<typename T>
! inline T Atomic::PlatformXchg<8>::operator()(T exchange_value,
!                                              T volatile* dest) const {
    STATIC_ASSERT(8 == sizeof(T));
    __asm__ __volatile__ ("xchgq (%2),%0"
                          : "=r" (exchange_value)
                          : "0" (exchange_value), "r" (dest)
                          : "memory");
--- 105,115 ----
    return old_value;
  }
  
  template<>
  template<typename T>
! inline T Atomic::PlatformXchg<8>::operator()(T exchange_value, T volatile* dest) const {
    STATIC_ASSERT(8 == sizeof(T));
    __asm__ __volatile__ ("xchgq (%2),%0"
                          : "=r" (exchange_value)
                          : "0" (exchange_value), "r" (dest)
                          : "memory");