| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // This file is an internal atomic implementation, use atomicops.h instead. |
| // |
| |
| #ifndef V8_BASE_ATOMICOPS_INTERNALS_PPC_H_ |
| #define V8_BASE_ATOMICOPS_INTERNALS_PPC_H_ |
| |
| namespace v8 { |
| namespace base { |
| |
| inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr, |
| Atomic32 old_value, |
| Atomic32 new_value) { |
| return (__sync_val_compare_and_swap(ptr, old_value, new_value)); |
| } |
| |
| inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr, |
| Atomic32 new_value) { |
| Atomic32 old_value; |
| do { |
| old_value = *ptr; |
| } while (__sync_bool_compare_and_swap(ptr, old_value, new_value) == false); |
| return old_value; |
| } |
| |
| inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr, |
| Atomic32 increment) { |
| return Barrier_AtomicIncrement(ptr, increment); |
| } |
| |
| inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr, |
| Atomic32 increment) { |
| for (;;) { |
| Atomic32 old_value = *ptr; |
| Atomic32 new_value = old_value + increment; |
| if (__sync_bool_compare_and_swap(ptr, old_value, new_value)) { |
| return new_value; |
| // The exchange took place as expected. |
| } |
| // Otherwise, *ptr changed mid-loop and we need to retry. |
| } |
| } |
| |
| inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr, |
| Atomic32 old_value, Atomic32 new_value) { |
| return NoBarrier_CompareAndSwap(ptr, old_value, new_value); |
| } |
| |
| inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr, |
| Atomic32 old_value, Atomic32 new_value) { |
| return NoBarrier_CompareAndSwap(ptr, old_value, new_value); |
| } |
| |
| inline void NoBarrier_Store(volatile Atomic8* ptr, Atomic8 value) { |
| *ptr = value; |
| } |
| |
| inline void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value) { |
| *ptr = value; |
| } |
| |
| inline void MemoryBarrier() { |
| __asm__ __volatile__("sync" : : : "memory"); } |
| |
| inline void Acquire_Store(volatile Atomic32* ptr, Atomic32 value) { |
| *ptr = value; |
| MemoryBarrier(); |
| } |
| |
| inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) { |
| MemoryBarrier(); |
| *ptr = value; |
| } |
| |
| inline Atomic8 NoBarrier_Load(volatile const Atomic8* ptr) { return *ptr; } |
| |
| inline Atomic32 NoBarrier_Load(volatile const Atomic32* ptr) { return *ptr; } |
| |
| inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) { |
| Atomic32 value = *ptr; |
| MemoryBarrier(); |
| return value; |
| } |
| |
| inline Atomic32 Release_Load(volatile const Atomic32* ptr) { |
| MemoryBarrier(); |
| return *ptr; |
| } |
| |
| #ifdef V8_TARGET_ARCH_PPC64 |
| inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr, |
| Atomic64 old_value, |
| Atomic64 new_value) { |
| return (__sync_val_compare_and_swap(ptr, old_value, new_value)); |
| } |
| |
| inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64* ptr, |
| Atomic64 new_value) { |
| Atomic64 old_value; |
| do { |
| old_value = *ptr; |
| } while (__sync_bool_compare_and_swap(ptr, old_value, new_value) == false); |
| return old_value; |
| } |
| |
| inline Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64* ptr, |
| Atomic64 increment) { |
| return Barrier_AtomicIncrement(ptr, increment); |
| } |
| |
| inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr, |
| Atomic64 increment) { |
| for (;;) { |
| Atomic64 old_value = *ptr; |
| Atomic64 new_value = old_value + increment; |
| if (__sync_bool_compare_and_swap(ptr, old_value, new_value)) { |
| return new_value; |
| // The exchange took place as expected. |
| } |
| // Otherwise, *ptr changed mid-loop and we need to retry. |
| } |
| } |
| |
| inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr, |
| Atomic64 old_value, Atomic64 new_value) { |
| return NoBarrier_CompareAndSwap(ptr, old_value, new_value); |
| } |
| |
| inline Atomic64 Release_CompareAndSwap(volatile Atomic64* ptr, |
| Atomic64 old_value, Atomic64 new_value) { |
| return NoBarrier_CompareAndSwap(ptr, old_value, new_value); |
| } |
| |
| inline void NoBarrier_Store(volatile Atomic64* ptr, Atomic64 value) { |
| *ptr = value; |
| } |
| |
| inline void Acquire_Store(volatile Atomic64* ptr, Atomic64 value) { |
| *ptr = value; |
| MemoryBarrier(); |
| } |
| |
| inline void Release_Store(volatile Atomic64* ptr, Atomic64 value) { |
| MemoryBarrier(); |
| *ptr = value; |
| } |
| |
| inline Atomic64 NoBarrier_Load(volatile const Atomic64* ptr) { return *ptr; } |
| |
| inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) { |
| Atomic64 value = *ptr; |
| MemoryBarrier(); |
| return value; |
| } |
| |
| inline Atomic64 Release_Load(volatile const Atomic64* ptr) { |
| MemoryBarrier(); |
| return *ptr; |
| } |
| |
| #endif |
| } // namespace base |
| } // namespace v8 |
| |
| #endif // V8_BASE_ATOMICOPS_INTERNALS_PPC_GCC_H_ |