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Side by Side Diff: src/base/atomicops_internals_s390_gcc.h

Issue 2438273002: Reland Update implementation of atomics with latest Chromium version but use compiler builtin atomi… (Closed)
Patch Set: fix memory order for release cmpxchg Created 4 years, 2 months ago
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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_
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