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src/hotspot/os_cpu/bsd_x86/atomic_bsd_x86.hpp

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 119 }
 120 
 121 template<>
 122 template<typename T>
 123 inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value,
 124                                                 T volatile* dest,
 125                                                 T compare_value,
 126                                                 atomic_memory_order /* order */) const {
 127   STATIC_ASSERT(8 == sizeof(T));
 128   __asm__ __volatile__ (  "lock cmpxchgq %1,(%3)"
 129                         : "=a" (exchange_value)
 130                         : "r" (exchange_value), "a" (compare_value), "r" (dest)
 131                         : "cc", "memory");
 132   return exchange_value;
 133 }
 134 
 135 #else // !AMD64
 136 
 137 extern "C" {
 138   // defined in bsd_x86.s
 139   int64_t _Atomic_cmpxchg_long(int64_t, volatile int64_t*, int64_t, bool);
 140   void _Atomic_move_long(const volatile int64_t* src, volatile int64_t* dst);
 141 }
 142 
 143 template<>
 144 template<typename T>
 145 inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value,
 146                                                 T volatile* dest,
 147                                                 T compare_value,
 148                                                 atomic_memory_order /* order */) const {
 149   STATIC_ASSERT(8 == sizeof(T));
 150   return cmpxchg_using_helper<int64_t>(_Atomic_cmpxchg_long, exchange_value, dest, compare_value);
 151 }
 152 
 153 template<>
 154 template<typename T>
 155 inline T Atomic::PlatformLoad<8>::operator()(T const volatile* src) const {
 156   STATIC_ASSERT(8 == sizeof(T));
 157   volatile int64_t dest;
 158   _Atomic_move_long(reinterpret_cast<const volatile int64_t*>(src), reinterpret_cast<volatile int64_t*>(&dest));
 159   return PrimitiveConversions::cast<T>(dest);


 119 }
 120 
 121 template<>
 122 template<typename T>
 123 inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value,
 124                                                 T volatile* dest,
 125                                                 T compare_value,
 126                                                 atomic_memory_order /* order */) const {
 127   STATIC_ASSERT(8 == sizeof(T));
 128   __asm__ __volatile__ (  "lock cmpxchgq %1,(%3)"
 129                         : "=a" (exchange_value)
 130                         : "r" (exchange_value), "a" (compare_value), "r" (dest)
 131                         : "cc", "memory");
 132   return exchange_value;
 133 }
 134 
 135 #else // !AMD64
 136 
 137 extern "C" {
 138   // defined in bsd_x86.s
 139   int64_t _Atomic_cmpxchg_long(int64_t, volatile int64_t*, int64_t);
 140   void _Atomic_move_long(const volatile int64_t* src, volatile int64_t* dst);
 141 }
 142 
 143 template<>
 144 template<typename T>
 145 inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value,
 146                                                 T volatile* dest,
 147                                                 T compare_value,
 148                                                 atomic_memory_order /* order */) const {
 149   STATIC_ASSERT(8 == sizeof(T));
 150   return cmpxchg_using_helper<int64_t>(_Atomic_cmpxchg_long, exchange_value, dest, compare_value);
 151 }
 152 
 153 template<>
 154 template<typename T>
 155 inline T Atomic::PlatformLoad<8>::operator()(T const volatile* src) const {
 156   STATIC_ASSERT(8 == sizeof(T));
 157   volatile int64_t dest;
 158   _Atomic_move_long(reinterpret_cast<const volatile int64_t*>(src), reinterpret_cast<volatile int64_t*>(&dest));
 159   return PrimitiveConversions::cast<T>(dest);
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