Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1 | // Copyright 2016 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | // This file is an internal atomic implementation, use atomicops.h instead. |
| 6 | |
| 7 | #ifndef V8_BASE_ATOMICOPS_INTERNALS_S390_H_ |
| 8 | #define V8_BASE_ATOMICOPS_INTERNALS_S390_H_ |
| 9 | |
| 10 | namespace v8 { |
| 11 | namespace base { |
| 12 | |
| 13 | inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr, |
| 14 | Atomic32 old_value, |
| 15 | Atomic32 new_value) { |
| 16 | return (__sync_val_compare_and_swap(ptr, old_value, new_value)); |
| 17 | } |
| 18 | |
| 19 | inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr, |
| 20 | Atomic32 new_value) { |
| 21 | Atomic32 old_value; |
| 22 | do { |
| 23 | old_value = *ptr; |
| 24 | } while (__sync_bool_compare_and_swap(ptr, old_value, new_value) == false); |
| 25 | return old_value; |
| 26 | } |
| 27 | |
| 28 | inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr, |
| 29 | Atomic32 increment) { |
| 30 | return Barrier_AtomicIncrement(ptr, increment); |
| 31 | } |
| 32 | |
| 33 | inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr, |
| 34 | Atomic32 increment) { |
| 35 | return __sync_add_and_fetch(ptr, increment); |
| 36 | } |
| 37 | |
| 38 | inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr, |
| 39 | Atomic32 old_value, Atomic32 new_value) { |
| 40 | return NoBarrier_CompareAndSwap(ptr, old_value, new_value); |
| 41 | } |
| 42 | |
| 43 | inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr, |
| 44 | Atomic32 old_value, Atomic32 new_value) { |
| 45 | return NoBarrier_CompareAndSwap(ptr, old_value, new_value); |
| 46 | } |
| 47 | |
| 48 | inline void NoBarrier_Store(volatile Atomic8* ptr, Atomic8 value) { |
| 49 | *ptr = value; |
| 50 | } |
| 51 | |
| 52 | inline void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value) { |
| 53 | *ptr = value; |
| 54 | } |
| 55 | |
| 56 | inline void MemoryBarrier() { __sync_synchronize(); } |
| 57 | |
| 58 | inline void Acquire_Store(volatile Atomic32* ptr, Atomic32 value) { |
| 59 | *ptr = value; |
| 60 | MemoryBarrier(); |
| 61 | } |
| 62 | |
| 63 | inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) { |
| 64 | MemoryBarrier(); |
| 65 | *ptr = value; |
| 66 | } |
| 67 | |
| 68 | inline Atomic8 NoBarrier_Load(volatile const Atomic8* ptr) { return *ptr; } |
| 69 | |
| 70 | inline Atomic32 NoBarrier_Load(volatile const Atomic32* ptr) { return *ptr; } |
| 71 | |
| 72 | inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) { |
| 73 | Atomic32 value = *ptr; |
| 74 | MemoryBarrier(); |
| 75 | return value; |
| 76 | } |
| 77 | |
| 78 | inline Atomic32 Release_Load(volatile const Atomic32* ptr) { |
| 79 | MemoryBarrier(); |
| 80 | return *ptr; |
| 81 | } |
| 82 | |
| 83 | #ifdef V8_TARGET_ARCH_S390X |
| 84 | inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr, |
| 85 | Atomic64 old_value, |
| 86 | Atomic64 new_value) { |
| 87 | return (__sync_val_compare_and_swap(ptr, old_value, new_value)); |
| 88 | } |
| 89 | |
| 90 | inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64* ptr, |
| 91 | Atomic64 new_value) { |
| 92 | Atomic64 old_value; |
| 93 | do { |
| 94 | old_value = *ptr; |
| 95 | } while (__sync_bool_compare_and_swap(ptr, old_value, new_value) == false); |
| 96 | return old_value; |
| 97 | } |
| 98 | |
| 99 | inline Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64* ptr, |
| 100 | Atomic64 increment) { |
| 101 | return Barrier_AtomicIncrement(ptr, increment); |
| 102 | } |
| 103 | |
| 104 | inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr, |
| 105 | Atomic64 increment) { |
| 106 | return __sync_add_and_fetch(ptr, increment); |
| 107 | } |
| 108 | |
| 109 | |
| 110 | inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr, |
| 111 | Atomic64 old_value, Atomic64 new_value) { |
| 112 | return NoBarrier_CompareAndSwap(ptr, old_value, new_value); |
| 113 | } |
| 114 | |
| 115 | inline Atomic64 Release_CompareAndSwap(volatile Atomic64* ptr, |
| 116 | Atomic64 old_value, Atomic64 new_value) { |
| 117 | return NoBarrier_CompareAndSwap(ptr, old_value, new_value); |
| 118 | } |
| 119 | |
| 120 | inline void NoBarrier_Store(volatile Atomic64* ptr, Atomic64 value) { |
| 121 | *ptr = value; |
| 122 | } |
| 123 | |
| 124 | inline void Acquire_Store(volatile Atomic64* ptr, Atomic64 value) { |
| 125 | *ptr = value; |
| 126 | MemoryBarrier(); |
| 127 | } |
| 128 | |
| 129 | inline void Release_Store(volatile Atomic64* ptr, Atomic64 value) { |
| 130 | MemoryBarrier(); |
| 131 | *ptr = value; |
| 132 | } |
| 133 | |
| 134 | inline Atomic64 NoBarrier_Load(volatile const Atomic64* ptr) { return *ptr; } |
| 135 | |
| 136 | inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) { |
| 137 | Atomic64 value = *ptr; |
| 138 | MemoryBarrier(); |
| 139 | return value; |
| 140 | } |
| 141 | |
| 142 | inline Atomic64 Release_Load(volatile const Atomic64* ptr) { |
| 143 | MemoryBarrier(); |
| 144 | return *ptr; |
| 145 | } |
| 146 | |
| 147 | #endif |
| 148 | |
| 149 | } // namespace base |
| 150 | } // namespace v8 |
| 151 | |
| 152 | #endif // V8_BASE_ATOMICOPS_INTERNALS_S390_H_ |