1 /*
2 * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef OS_CPU_BSD_X86_VM_ATOMIC_BSD_X86_HPP
26 #define OS_CPU_BSD_X86_VM_ATOMIC_BSD_X86_HPP
27
28 // Implementation of class atomic
29
30 template<size_t byte_size>
31 struct Atomic::PlatformAdd
32 : Atomic::FetchAndAdd<Atomic::PlatformAdd<byte_size> >
33 {
34 template<typename I, typename D>
35 D fetch_and_add(I add_value, D volatile* dest) const;
36 };
37
38 template<>
39 template<typename I, typename D>
40 inline D Atomic::PlatformAdd<4>::fetch_and_add(I add_value, D volatile* dest) const {
41 STATIC_ASSERT(4 == sizeof(I));
42 STATIC_ASSERT(4 == sizeof(D));
43 D old_value;
44 __asm__ volatile ( "lock xaddl %0,(%2)"
45 : "=r" (old_value)
46 : "0" (add_value), "r" (dest)
47 : "cc", "memory");
48 return old_value;
49 }
50
51 template<>
52 template<typename T>
53 inline T Atomic::PlatformXchg<4>::operator()(T exchange_value,
54 T volatile* dest) const {
55 STATIC_ASSERT(4 == sizeof(T));
56 __asm__ volatile ( "xchgl (%2),%0"
57 : "=r" (exchange_value)
58 : "0" (exchange_value), "r" (dest)
59 : "memory");
60 return exchange_value;
61 }
62
63 template<>
64 template<typename T>
65 inline T Atomic::PlatformCmpxchg<1>::operator()(T exchange_value,
66 T volatile* dest,
67 T compare_value,
68 cmpxchg_memory_order /* order */) const {
69 STATIC_ASSERT(1 == sizeof(T));
70 __asm__ volatile ( "lock cmpxchgb %1,(%3)"
71 : "=a" (exchange_value)
72 : "q" (exchange_value), "a" (compare_value), "r" (dest)
73 : "cc", "memory");
74 return exchange_value;
75 }
76
77 template<>
78 template<typename T>
79 inline T Atomic::PlatformCmpxchg<4>::operator()(T exchange_value,
80 T volatile* dest,
81 T compare_value,
82 cmpxchg_memory_order /* order */) const {
83 STATIC_ASSERT(4 == sizeof(T));
84 __asm__ volatile ( "lock cmpxchgl %1,(%3)"
85 : "=a" (exchange_value)
86 : "r" (exchange_value), "a" (compare_value), "r" (dest)
87 : "cc", "memory");
88 return exchange_value;
89 }
90
91 #ifdef AMD64
92 template<>
93 template<typename I, typename D>
94 inline D Atomic::PlatformAdd<8>::fetch_and_add(I add_value, D volatile* dest) const {
95 STATIC_ASSERT(8 == sizeof(I));
96 STATIC_ASSERT(8 == sizeof(D));
97 D old_value;
98 __asm__ __volatile__ ( "lock xaddq %0,(%2)"
99 : "=r" (old_value)
100 : "0" (add_value), "r" (dest)
101 : "cc", "memory");
102 return old_value;
103 }
104
105 template<>
106 template<typename T>
107 inline T Atomic::PlatformXchg<8>::operator()(T exchange_value,
108 T volatile* dest) const {
109 STATIC_ASSERT(8 == sizeof(T));
110 __asm__ __volatile__ ("xchgq (%2),%0"
111 : "=r" (exchange_value)
112 : "0" (exchange_value), "r" (dest)
113 : "memory");
114 return exchange_value;
115 }
116
117 template<>
118 template<typename T>
119 inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value,
120 T volatile* dest,
121 T compare_value,
122 cmpxchg_memory_order /* order */) const {
123 STATIC_ASSERT(8 == sizeof(T));
124 __asm__ __volatile__ ( "lock cmpxchgq %1,(%3)"
125 : "=a" (exchange_value)
126 : "r" (exchange_value), "a" (compare_value), "r" (dest)
127 : "cc", "memory");
128 return exchange_value;
129 }
130
131 #else // !AMD64
132
133 extern "C" {
134 // defined in bsd_x86.s
135 int64_t _Atomic_cmpxchg_long(int64_t, volatile int64_t*, int64_t, bool);
136 void _Atomic_move_long(const volatile int64_t* src, volatile int64_t* dst);
137 }
138
139 template<>
140 template<typename T>
141 inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value,
142 T volatile* dest,
143 T compare_value,
144 cmpxchg_memory_order order) const {
145 STATIC_ASSERT(8 == sizeof(T));
146 return cmpxchg_using_helper<int64_t>(_Atomic_cmpxchg_long, exchange_value, dest, compare_value);
147 }
148
149 template<>
150 template<typename T>
151 inline T Atomic::PlatformLoad<8>::operator()(T const volatile* src) const {
152 STATIC_ASSERT(8 == sizeof(T));
153 volatile int64_t dest;
154 _Atomic_move_long(reinterpret_cast<const volatile int64_t*>(src), reinterpret_cast<volatile int64_t*>(&dest));
155 return PrimitiveConversions::cast<T>(dest);
156 }
157
158 template<>
159 template<typename T>
160 inline void Atomic::PlatformStore<8>::operator()(T store_value,
161 T volatile* dest) const {
162 STATIC_ASSERT(8 == sizeof(T));
163 _Atomic_move_long(reinterpret_cast<const volatile int64_t*>(&store_value), reinterpret_cast<volatile int64_t*>(dest));
164 }
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1 /*
2 * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef OS_CPU_BSD_X86_VM_ATOMIC_BSD_X86_HPP
26 #define OS_CPU_BSD_X86_VM_ATOMIC_BSD_X86_HPP
27
28 // Implementation of class atomic
29
30 template<size_t byte_size>
31 struct Atomic::PlatformAdd
32 : Atomic::FetchAndAdd<Atomic::PlatformAdd<byte_size> >
33 {
34 template<typename I, typename D>
35 D fetch_and_add(I add_value, D volatile* dest, atomic_memory_order /* order */) const;
36 };
37
38 template<>
39 template<typename I, typename D>
40 inline D Atomic::PlatformAdd<4>::fetch_and_add(I add_value, D volatile* dest,
41 atomic_memory_order /* order */) const {
42 STATIC_ASSERT(4 == sizeof(I));
43 STATIC_ASSERT(4 == sizeof(D));
44 D old_value;
45 __asm__ volatile ( "lock xaddl %0,(%2)"
46 : "=r" (old_value)
47 : "0" (add_value), "r" (dest)
48 : "cc", "memory");
49 return old_value;
50 }
51
52 template<>
53 template<typename T>
54 inline T Atomic::PlatformXchg<4>::operator()(T exchange_value,
55 T volatile* dest,
56 atomic_memory_order /* order */) const {
57 STATIC_ASSERT(4 == sizeof(T));
58 __asm__ volatile ( "xchgl (%2),%0"
59 : "=r" (exchange_value)
60 : "0" (exchange_value), "r" (dest)
61 : "memory");
62 return exchange_value;
63 }
64
65 template<>
66 template<typename T>
67 inline T Atomic::PlatformCmpxchg<1>::operator()(T exchange_value,
68 T volatile* dest,
69 T compare_value,
70 atomic_memory_order /* order */) const {
71 STATIC_ASSERT(1 == sizeof(T));
72 __asm__ volatile ( "lock cmpxchgb %1,(%3)"
73 : "=a" (exchange_value)
74 : "q" (exchange_value), "a" (compare_value), "r" (dest)
75 : "cc", "memory");
76 return exchange_value;
77 }
78
79 template<>
80 template<typename T>
81 inline T Atomic::PlatformCmpxchg<4>::operator()(T exchange_value,
82 T volatile* dest,
83 T compare_value,
84 atomic_memory_order /* order */) const {
85 STATIC_ASSERT(4 == sizeof(T));
86 __asm__ volatile ( "lock cmpxchgl %1,(%3)"
87 : "=a" (exchange_value)
88 : "r" (exchange_value), "a" (compare_value), "r" (dest)
89 : "cc", "memory");
90 return exchange_value;
91 }
92
93 #ifdef AMD64
94 template<>
95 template<typename I, typename D>
96 inline D Atomic::PlatformAdd<8>::fetch_and_add(I add_value, D volatile* dest,
97 atomic_memory_order /* order */) const {
98 STATIC_ASSERT(8 == sizeof(I));
99 STATIC_ASSERT(8 == sizeof(D));
100 D old_value;
101 __asm__ __volatile__ ( "lock xaddq %0,(%2)"
102 : "=r" (old_value)
103 : "0" (add_value), "r" (dest)
104 : "cc", "memory");
105 return old_value;
106 }
107
108 template<>
109 template<typename T>
110 inline T Atomic::PlatformXchg<8>::operator()(T exchange_value,
111 T volatile* dest,
112 atomic_memory_order /* order */) const {
113 STATIC_ASSERT(8 == sizeof(T));
114 __asm__ __volatile__ ("xchgq (%2),%0"
115 : "=r" (exchange_value)
116 : "0" (exchange_value), "r" (dest)
117 : "memory");
118 return exchange_value;
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);
160 }
161
162 template<>
163 template<typename T>
164 inline void Atomic::PlatformStore<8>::operator()(T store_value,
165 T volatile* dest) const {
166 STATIC_ASSERT(8 == sizeof(T));
167 _Atomic_move_long(reinterpret_cast<const volatile int64_t*>(&store_value), reinterpret_cast<volatile int64_t*>(dest));
168 }
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