orderAccess_solaris_x86.inline.hpp revision 1472:c18cbe5936b8 
1/*
2 * Copyright (c) 2003, 2009, 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// Implementation of class OrderAccess.
26
27// For Sun Studio - implementation is in solaris_i486.il.
28// For gcc - implementation is just below.
29extern "C" void _OrderAccess_acquire();
30extern "C" void _OrderAccess_fence();
31
32inline void OrderAccess::loadload()   { acquire(); }
33inline void OrderAccess::storestore() { release(); }
34inline void OrderAccess::loadstore()  { acquire(); }
35inline void OrderAccess::storeload()  { fence(); }
36
37inline void OrderAccess::acquire() {
38  _OrderAccess_acquire();
39
40}
41
42inline void OrderAccess::release() {
43  dummy = 0;
44}
45
46inline void OrderAccess::fence() {
47  if (os::is_MP()) {
48    _OrderAccess_fence();
49  }
50}
51
52#ifdef _GNU_SOURCE
53
54extern "C" {
55  inline void _OrderAccess_acquire() {
56    volatile intptr_t dummy;
57#ifdef AMD64
58    __asm__ volatile ("movq 0(%%rsp), %0" : "=r" (dummy) : : "memory");
59#else
60    __asm__ volatile ("movl 0(%%esp),%0" : "=r" (dummy) : : "memory");
61#endif // AMD64
62  }
63  inline void _OrderAccess_fence() {
64    // Always use locked addl since mfence is sometimes expensive
65    __asm__ volatile ("lock; addl $0,0(%%esp)" : : : "cc", "memory");
66  }
67
68}
69
70#endif // GNU_SOURCE
71
72inline jbyte    OrderAccess::load_acquire(volatile jbyte*   p) { return *p; }
73inline jshort   OrderAccess::load_acquire(volatile jshort*  p) { return *p; }
74inline jint     OrderAccess::load_acquire(volatile jint*    p) { return *p; }
75inline jlong    OrderAccess::load_acquire(volatile jlong*   p) { return *p; }
76inline jubyte   OrderAccess::load_acquire(volatile jubyte*  p) { return *p; }
77inline jushort  OrderAccess::load_acquire(volatile jushort* p) { return *p; }
78inline juint    OrderAccess::load_acquire(volatile juint*   p) { return *p; }
79inline julong   OrderAccess::load_acquire(volatile julong*  p) { return *p; }
80inline jfloat   OrderAccess::load_acquire(volatile jfloat*  p) { return *p; }
81inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return *p; }
82
83inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t*   p) { return *p; }
84inline void*    OrderAccess::load_ptr_acquire(volatile void*       p) { return *(void* volatile *)p; }
85inline void*    OrderAccess::load_ptr_acquire(const volatile void* p) { return *(void* const volatile *)p; }
86
87inline void     OrderAccess::release_store(volatile jbyte*   p, jbyte   v) { *p = v; }
88inline void     OrderAccess::release_store(volatile jshort*  p, jshort  v) { *p = v; }
89inline void     OrderAccess::release_store(volatile jint*    p, jint    v) { *p = v; }
90inline void     OrderAccess::release_store(volatile jlong*   p, jlong   v) { *p = v; }
91inline void     OrderAccess::release_store(volatile jubyte*  p, jubyte  v) { *p = v; }
92inline void     OrderAccess::release_store(volatile jushort* p, jushort v) { *p = v; }
93inline void     OrderAccess::release_store(volatile juint*   p, juint   v) { *p = v; }
94inline void     OrderAccess::release_store(volatile julong*  p, julong  v) { *p = v; }
95inline void     OrderAccess::release_store(volatile jfloat*  p, jfloat  v) { *p = v; }
96inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { *p = v; }
97
98inline void     OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; }
99inline void     OrderAccess::release_store_ptr(volatile void*     p, void*    v) { *(void* volatile *)p = v; }
100
101inline void     OrderAccess::store_fence(jbyte*   p, jbyte   v) { *p = v; fence(); }
102inline void     OrderAccess::store_fence(jshort*  p, jshort  v) { *p = v; fence(); }
103inline void     OrderAccess::store_fence(jint*    p, jint    v) { *p = v; fence(); }
104inline void     OrderAccess::store_fence(jlong*   p, jlong   v) { *p = v; fence(); }
105inline void     OrderAccess::store_fence(jubyte*  p, jubyte  v) { *p = v; fence(); }
106inline void     OrderAccess::store_fence(jushort* p, jushort v) { *p = v; fence(); }
107inline void     OrderAccess::store_fence(juint*   p, juint   v) { *p = v; fence(); }
108inline void     OrderAccess::store_fence(julong*  p, julong  v) { *p = v; fence(); }
109inline void     OrderAccess::store_fence(jfloat*  p, jfloat  v) { *p = v; fence(); }
110inline void     OrderAccess::store_fence(jdouble* p, jdouble v) { *p = v; fence(); }
111
112inline void     OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) { *p = v; fence(); }
113inline void     OrderAccess::store_ptr_fence(void**    p, void*    v) { *p = v; fence(); }
114
115inline void     OrderAccess::release_store_fence(volatile jbyte*   p, jbyte   v) { *p = v; fence(); }
116inline void     OrderAccess::release_store_fence(volatile jshort*  p, jshort  v) { *p = v; fence(); }
117inline void     OrderAccess::release_store_fence(volatile jint*    p, jint    v) { *p = v; fence(); }
118inline void     OrderAccess::release_store_fence(volatile jlong*   p, jlong   v) { *p = v; fence(); }
119inline void     OrderAccess::release_store_fence(volatile jubyte*  p, jubyte  v) { *p = v; fence(); }
120inline void     OrderAccess::release_store_fence(volatile jushort* p, jushort v) { *p = v; fence(); }
121inline void     OrderAccess::release_store_fence(volatile juint*   p, juint   v) { *p = v; fence(); }
122inline void     OrderAccess::release_store_fence(volatile julong*  p, julong  v) { *p = v; fence(); }
123inline void     OrderAccess::release_store_fence(volatile jfloat*  p, jfloat  v) { *p = v; fence(); }
124inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { *p = v; fence(); }
125
126inline void     OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { *p = v; fence(); }
127inline void     OrderAccess::release_store_ptr_fence(volatile void*     p, void*    v) { *(void* volatile *)p = v; fence(); }
128