222 #endif // ARM
223 }
224
225 template<>
226 template<typename T>
227 inline T Atomic::PlatformXchg<8>::operator()(T volatile* dest,
228 T exchange_value,
229 atomic_memory_order order) const {
230 STATIC_ASSERT(8 == sizeof(T));
231 T result = __sync_lock_test_and_set (dest, exchange_value);
232 __sync_synchronize();
233 return result;
234 }
235
236 // No direct support for cmpxchg of bytes; emulate using int.
237 template<>
238 struct Atomic::PlatformCmpxchg<1> : Atomic::CmpxchgByteUsingInt {};
239
240 template<>
241 template<typename T>
242 inline T Atomic::PlatformCmpxchg<4>::operator()(T exchange_value,
243 T volatile* dest,
244 T compare_value,
245 atomic_memory_order order) const {
246 STATIC_ASSERT(4 == sizeof(T));
247 #ifdef ARM
248 return cmpxchg_using_helper<int>(arm_compare_and_swap, exchange_value, dest, compare_value);
249 #else
250 #ifdef M68K
251 return cmpxchg_using_helper<int>(m68k_compare_and_swap, exchange_value, dest, compare_value);
252 #else
253 return __sync_val_compare_and_swap(dest, compare_value, exchange_value);
254 #endif // M68K
255 #endif // ARM
256 }
257
258 template<>
259 template<typename T>
260 inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value,
261 T volatile* dest,
262 T compare_value,
263 atomic_memory_order order) const {
264 STATIC_ASSERT(8 == sizeof(T));
265 return __sync_val_compare_and_swap(dest, compare_value, exchange_value);
266 }
267
268 template<>
269 template<typename T>
270 inline T Atomic::PlatformLoad<8>::operator()(T const volatile* src) const {
271 STATIC_ASSERT(8 == sizeof(T));
272 volatile int64_t dest;
273 os::atomic_copy64(reinterpret_cast<const volatile int64_t*>(src), reinterpret_cast<volatile int64_t*>(&dest));
274 return PrimitiveConversions::cast<T>(dest);
275 }
276
277 template<>
278 template<typename T>
279 inline void Atomic::PlatformStore<8>::operator()(T volatile* dest,
280 T store_value) const {
281 STATIC_ASSERT(8 == sizeof(T));
282 os::atomic_copy64(reinterpret_cast<const volatile int64_t*>(&store_value), reinterpret_cast<volatile int64_t*>(dest));
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222 #endif // ARM
223 }
224
225 template<>
226 template<typename T>
227 inline T Atomic::PlatformXchg<8>::operator()(T volatile* dest,
228 T exchange_value,
229 atomic_memory_order order) const {
230 STATIC_ASSERT(8 == sizeof(T));
231 T result = __sync_lock_test_and_set (dest, exchange_value);
232 __sync_synchronize();
233 return result;
234 }
235
236 // No direct support for cmpxchg of bytes; emulate using int.
237 template<>
238 struct Atomic::PlatformCmpxchg<1> : Atomic::CmpxchgByteUsingInt {};
239
240 template<>
241 template<typename T>
242 inline T Atomic::PlatformCmpxchg<4>::operator()(T volatile* dest,
243 T compare_value,
244 T exchange_value,
245 atomic_memory_order order) const {
246 STATIC_ASSERT(4 == sizeof(T));
247 #ifdef ARM
248 return cmpxchg_using_helper<int>(arm_compare_and_swap, dest, compare_value, exchange_value);
249 #else
250 #ifdef M68K
251 return cmpxchg_using_helper<int>(m68k_compare_and_swap, dest, compare_value, exchange_value);
252 #else
253 return __sync_val_compare_and_swap(dest, compare_value, exchange_value);
254 #endif // M68K
255 #endif // ARM
256 }
257
258 template<>
259 template<typename T>
260 inline T Atomic::PlatformCmpxchg<8>::operator()(T volatile* dest,
261 T compare_value,
262 T exchange_value,
263 atomic_memory_order order) const {
264 STATIC_ASSERT(8 == sizeof(T));
265 return __sync_val_compare_and_swap(dest, compare_value, exchange_value);
266 }
267
268 template<>
269 template<typename T>
270 inline T Atomic::PlatformLoad<8>::operator()(T const volatile* src) const {
271 STATIC_ASSERT(8 == sizeof(T));
272 volatile int64_t dest;
273 os::atomic_copy64(reinterpret_cast<const volatile int64_t*>(src), reinterpret_cast<volatile int64_t*>(&dest));
274 return PrimitiveConversions::cast<T>(dest);
275 }
276
277 template<>
278 template<typename T>
279 inline void Atomic::PlatformStore<8>::operator()(T volatile* dest,
280 T store_value) const {
281 STATIC_ASSERT(8 == sizeof(T));
282 os::atomic_copy64(reinterpret_cast<const volatile int64_t*>(&store_value), reinterpret_cast<volatile int64_t*>(dest));
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