orderAccess_solaris_x86.inline.hpp revision 6760:22b98ab2a69f 
1/*
2 * Copyright (c) 2003, 2014, 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_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.inline.hpp"
29#include "runtime/orderAccess.hpp"
30#include "runtime/os.hpp"
31
32// Implementation of class OrderAccess.
33
34// For Sun Studio - implementation is in solaris_i486.il.
35// For gcc - implementation is just below.
36extern "C" void _OrderAccess_acquire();
37extern "C" void _OrderAccess_fence();
38
39inline void OrderAccess::loadload()   { acquire(); }
40inline void OrderAccess::storestore() { release(); }
41inline void OrderAccess::loadstore()  { acquire(); }
42inline void OrderAccess::storeload()  { fence(); }
43
44inline void OrderAccess::acquire() {
45  _OrderAccess_acquire();
46
47}
48
49inline void OrderAccess::release() {
50  // Avoid hitting the same cache-line from
51  // different threads.
52  volatile jint local_dummy = 0;
53}
54
55inline void OrderAccess::fence() {
56  if (os::is_MP()) {
57    _OrderAccess_fence();
58  }
59}
60
61#ifdef _GNU_SOURCE
62
63extern "C" {
64  inline void _OrderAccess_acquire() {
65    volatile intptr_t local_dummy;
66#ifdef AMD64
67    __asm__ volatile ("movq 0(%%rsp), %0" : "=r" (local_dummy) : : "memory");
68#else
69    __asm__ volatile ("movl 0(%%esp),%0" : "=r" (local_dummy) : : "memory");
70#endif // AMD64
71  }
72  inline void _OrderAccess_fence() {
73    // Always use locked addl since mfence is sometimes expensive
74    __asm__ volatile ("lock; addl $0,0(%%esp)" : : : "cc", "memory");
75  }
76
77}
78
79#endif // GNU_SOURCE
80
81inline jbyte    OrderAccess::load_acquire(volatile jbyte*   p) { return *p; }
82inline jshort   OrderAccess::load_acquire(volatile jshort*  p) { return *p; }
83inline jint     OrderAccess::load_acquire(volatile jint*    p) { return *p; }
84inline jlong    OrderAccess::load_acquire(volatile jlong*   p) { return Atomic::load(p); }
85inline jubyte   OrderAccess::load_acquire(volatile jubyte*  p) { return *p; }
86inline jushort  OrderAccess::load_acquire(volatile jushort* p) { return *p; }
87inline juint    OrderAccess::load_acquire(volatile juint*   p) { return *p; }
88inline julong   OrderAccess::load_acquire(volatile julong*  p) { return Atomic::load((volatile jlong*)p); }
89inline jfloat   OrderAccess::load_acquire(volatile jfloat*  p) { return *p; }
90inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return jdouble_cast(Atomic::load((volatile jlong*)p)); }
91
92inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t*   p) { return *p; }
93inline void*    OrderAccess::load_ptr_acquire(volatile void*       p) { return *(void* volatile *)p; }
94inline void*    OrderAccess::load_ptr_acquire(const volatile void* p) { return *(void* const volatile *)p; }
95
96inline void     OrderAccess::release_store(volatile jbyte*   p, jbyte   v) { *p = v; }
97inline void     OrderAccess::release_store(volatile jshort*  p, jshort  v) { *p = v; }
98inline void     OrderAccess::release_store(volatile jint*    p, jint    v) { *p = v; }
99inline void     OrderAccess::release_store(volatile jlong*   p, jlong   v) { Atomic::store(v, p); }
100inline void     OrderAccess::release_store(volatile jubyte*  p, jubyte  v) { *p = v; }
101inline void     OrderAccess::release_store(volatile jushort* p, jushort v) { *p = v; }
102inline void     OrderAccess::release_store(volatile juint*   p, juint   v) { *p = v; }
103inline void     OrderAccess::release_store(volatile julong*  p, julong  v) { Atomic::store((jlong)v, (volatile jlong*)p); }
104inline void     OrderAccess::release_store(volatile jfloat*  p, jfloat  v) { *p = v; }
105inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { release_store((volatile jlong*)p, jlong_cast(v)); }
106
107inline void     OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; }
108inline void     OrderAccess::release_store_ptr(volatile void*     p, void*    v) { *(void* volatile *)p = v; }
109
110inline void     OrderAccess::store_fence(jbyte*   p, jbyte   v) { *p = v; fence(); }
111inline void     OrderAccess::store_fence(jshort*  p, jshort  v) { *p = v; fence(); }
112inline void     OrderAccess::store_fence(jint*    p, jint    v) { *p = v; fence(); }
113inline void     OrderAccess::store_fence(jlong*   p, jlong   v) { *p = v; fence(); }
114inline void     OrderAccess::store_fence(jubyte*  p, jubyte  v) { *p = v; fence(); }
115inline void     OrderAccess::store_fence(jushort* p, jushort v) { *p = v; fence(); }
116inline void     OrderAccess::store_fence(juint*   p, juint   v) { *p = v; fence(); }
117inline void     OrderAccess::store_fence(julong*  p, julong  v) { *p = v; fence(); }
118inline void     OrderAccess::store_fence(jfloat*  p, jfloat  v) { *p = v; fence(); }
119inline void     OrderAccess::store_fence(jdouble* p, jdouble v) { *p = v; fence(); }
120
121inline void     OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) { *p = v; fence(); }
122inline void     OrderAccess::store_ptr_fence(void**    p, void*    v) { *p = v; fence(); }
123
124inline void     OrderAccess::release_store_fence(volatile jbyte*   p, jbyte   v) { *p = v; fence(); }
125inline void     OrderAccess::release_store_fence(volatile jshort*  p, jshort  v) { *p = v; fence(); }
126inline void     OrderAccess::release_store_fence(volatile jint*    p, jint    v) { *p = v; fence(); }
127inline void     OrderAccess::release_store_fence(volatile jlong*   p, jlong   v) { release_store(p, v); fence(); }
128inline void     OrderAccess::release_store_fence(volatile jubyte*  p, jubyte  v) { *p = v; fence(); }
129inline void     OrderAccess::release_store_fence(volatile jushort* p, jushort v) { *p = v; fence(); }
130inline void     OrderAccess::release_store_fence(volatile juint*   p, juint   v) { *p = v; fence(); }
131inline void     OrderAccess::release_store_fence(volatile julong*  p, julong  v) { release_store((jlong *)p, (jlong)v); fence(); }
132inline void     OrderAccess::release_store_fence(volatile jfloat*  p, jfloat  v) { *p = v; fence(); }
133inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { release_store_fence((volatile jlong*)p, jlong_cast(v)); }
134
135inline void     OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { *p = v; fence(); }
136inline void     OrderAccess::release_store_ptr_fence(volatile void*     p, void*    v) { *(void* volatile *)p = v; fence(); }
137
138#endif // OS_CPU_SOLARIS_X86_VM_ORDERACCESS_SOLARIS_X86_INLINE_HPP
139