orderAccess_solaris_x86.inline.hpp revision 3883:cd3d6a6b95d9 
1/*
2 * Copyright (c) 2003, 2011, 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
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23 */
24
25#ifndef OS_CPU_SOLARIS_X86_VM_ORDERACCESS_SOLARIS_X86_INLINE_HPP
26#define OS_CPU_SOLARIS_X86_VM_ORDERACCESS_SOLARIS_X86_INLINE_HPP
27
28#include "runtime/atomic.hpp"
29#include "runtime/orderAccess.hpp"
30#include "runtime/os.hpp"
31#include "vm_version_x86.hpp"
32
33// Implementation of class OrderAccess.
34
35// For Sun Studio - implementation is in solaris_i486.il.
36// For gcc - implementation is just below.
37extern "C" void _OrderAccess_acquire();
38extern "C" void _OrderAccess_fence();
39
40inline void OrderAccess::loadload()   { acquire(); }
41inline void OrderAccess::storestore() { release(); }
42inline void OrderAccess::loadstore()  { acquire(); }
43inline void OrderAccess::storeload()  { fence(); }
44
45inline void OrderAccess::acquire() {
46  _OrderAccess_acquire();
47
48}
49
50inline void OrderAccess::release() {
51  // Avoid hitting the same cache-line from
52  // different threads.
53  volatile jint local_dummy = 0;
54}
55
56inline void OrderAccess::fence() {
57  if (os::is_MP()) {
58    _OrderAccess_fence();
59  }
60}
61
62#ifdef _GNU_SOURCE
63
64extern "C" {
65  inline void _OrderAccess_acquire() {
66    volatile intptr_t local_dummy;
67#ifdef AMD64
68    __asm__ volatile ("movq 0(%%rsp), %0" : "=r" (local_dummy) : : "memory");
69#else
70    __asm__ volatile ("movl 0(%%esp),%0" : "=r" (local_dummy) : : "memory");
71#endif // AMD64
72  }
73  inline void _OrderAccess_fence() {
74    // Always use locked addl since mfence is sometimes expensive
75    __asm__ volatile ("lock; addl $0,0(%%esp)" : : : "cc", "memory");
76  }
77
78}
79
80#endif // GNU_SOURCE
81
82inline jbyte    OrderAccess::load_acquire(volatile jbyte*   p) { return *p; }
83inline jshort   OrderAccess::load_acquire(volatile jshort*  p) { return *p; }
84inline jint     OrderAccess::load_acquire(volatile jint*    p) { return *p; }
85inline jlong    OrderAccess::load_acquire(volatile jlong*   p) { return Atomic::load(p); }
86inline jubyte   OrderAccess::load_acquire(volatile jubyte*  p) { return *p; }
87inline jushort  OrderAccess::load_acquire(volatile jushort* p) { return *p; }
88inline juint    OrderAccess::load_acquire(volatile juint*   p) { return *p; }
89inline julong   OrderAccess::load_acquire(volatile julong*  p) { return Atomic::load((volatile jlong*)p); }
90inline jfloat   OrderAccess::load_acquire(volatile jfloat*  p) { return *p; }
91inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return *p; }
92
93inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t*   p) { return *p; }
94inline void*    OrderAccess::load_ptr_acquire(volatile void*       p) { return *(void* volatile *)p; }
95inline void*    OrderAccess::load_ptr_acquire(const volatile void* p) { return *(void* const volatile *)p; }
96
97inline void     OrderAccess::release_store(volatile jbyte*   p, jbyte   v) { *p = v; }
98inline void     OrderAccess::release_store(volatile jshort*  p, jshort  v) { *p = v; }
99inline void     OrderAccess::release_store(volatile jint*    p, jint    v) { *p = v; }
100inline void     OrderAccess::release_store(volatile jlong*   p, jlong   v) { Atomic::store(v, p); }
101inline void     OrderAccess::release_store(volatile jubyte*  p, jubyte  v) { *p = v; }
102inline void     OrderAccess::release_store(volatile jushort* p, jushort v) { *p = v; }
103inline void     OrderAccess::release_store(volatile juint*   p, juint   v) { *p = v; }
104inline void     OrderAccess::release_store(volatile julong*  p, julong  v) { Atomic::store((jlong)v, (volatile jlong*)p); }
105inline void     OrderAccess::release_store(volatile jfloat*  p, jfloat  v) { *p = v; }
106inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { *p = v; }
107
108inline void     OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; }
109inline void     OrderAccess::release_store_ptr(volatile void*     p, void*    v) { *(void* volatile *)p = v; }
110
111inline void     OrderAccess::store_fence(jbyte*   p, jbyte   v) { *p = v; fence(); }
112inline void     OrderAccess::store_fence(jshort*  p, jshort  v) { *p = v; fence(); }
113inline void     OrderAccess::store_fence(jint*    p, jint    v) { *p = v; fence(); }
114inline void     OrderAccess::store_fence(jlong*   p, jlong   v) { *p = v; fence(); }
115inline void     OrderAccess::store_fence(jubyte*  p, jubyte  v) { *p = v; fence(); }
116inline void     OrderAccess::store_fence(jushort* p, jushort v) { *p = v; fence(); }
117inline void     OrderAccess::store_fence(juint*   p, juint   v) { *p = v; fence(); }
118inline void     OrderAccess::store_fence(julong*  p, julong  v) { *p = v; fence(); }
119inline void     OrderAccess::store_fence(jfloat*  p, jfloat  v) { *p = v; fence(); }
120inline void     OrderAccess::store_fence(jdouble* p, jdouble v) { *p = v; fence(); }
121
122inline void     OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) { *p = v; fence(); }
123inline void     OrderAccess::store_ptr_fence(void**    p, void*    v) { *p = v; fence(); }
124
125inline void     OrderAccess::release_store_fence(volatile jbyte*   p, jbyte   v) { *p = v; fence(); }
126inline void     OrderAccess::release_store_fence(volatile jshort*  p, jshort  v) { *p = v; fence(); }
127inline void     OrderAccess::release_store_fence(volatile jint*    p, jint    v) { *p = v; fence(); }
128inline void     OrderAccess::release_store_fence(volatile jlong*   p, jlong   v) { release_store(p, v); fence(); }
129inline void     OrderAccess::release_store_fence(volatile jubyte*  p, jubyte  v) { *p = v; fence(); }
130inline void     OrderAccess::release_store_fence(volatile jushort* p, jushort v) { *p = v; fence(); }
131inline void     OrderAccess::release_store_fence(volatile juint*   p, juint   v) { *p = v; fence(); }
132inline void     OrderAccess::release_store_fence(volatile julong*  p, julong  v) { release_store(p, v); fence(); }
133inline void     OrderAccess::release_store_fence(volatile jfloat*  p, jfloat  v) { *p = v; fence(); }
134inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { *p = v; fence(); }
135
136inline void     OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { *p = v; fence(); }
137inline void     OrderAccess::release_store_ptr_fence(volatile void*     p, void*    v) { *(void* volatile *)p = v; fence(); }
138
139#endif // OS_CPU_SOLARIS_X86_VM_ORDERACCESS_SOLARIS_X86_INLINE_HPP
140