1 /* 2 * Copyright (c) 2003, 2013, 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 #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. 37 extern "C" void _OrderAccess_acquire(); 38 extern "C" void _OrderAccess_fence(); 39 40 inline void OrderAccess::loadload() { acquire(); } 41 inline void OrderAccess::storestore() { release(); } 42 inline void OrderAccess::loadstore() { acquire(); } 43 inline void OrderAccess::storeload() { fence(); } 44 45 inline void OrderAccess::acquire() { 46 _OrderAccess_acquire(); 47 48 } 49 50 inline void OrderAccess::release() { 51 // Avoid hitting the same cache-line from 52 // different threads. 53 volatile jint local_dummy = 0; 54 } 55 56 inline void OrderAccess::fence() { 57 if (os::is_MP()) { 58 _OrderAccess_fence(); 59 } 60 } 61 62 #ifdef _GNU_SOURCE 63 64 extern "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 82 inline jbyte OrderAccess::load_acquire(volatile jbyte* p) { return *p; } 83 inline jshort OrderAccess::load_acquire(volatile jshort* p) { return *p; } 84 inline jint OrderAccess::load_acquire(volatile jint* p) { return *p; } 85 inline jlong OrderAccess::load_acquire(volatile jlong* p) { return Atomic::load(p); } 86 inline jubyte OrderAccess::load_acquire(volatile jubyte* p) { return *p; } 87 inline jushort OrderAccess::load_acquire(volatile jushort* p) { return *p; } 88 inline juint OrderAccess::load_acquire(volatile juint* p) { return *p; } 89 inline julong OrderAccess::load_acquire(volatile julong* p) { return Atomic::load((volatile jlong*)p); } 90 inline jfloat OrderAccess::load_acquire(volatile jfloat* p) { return *p; } 91 inline jdouble OrderAccess::load_acquire(volatile jdouble* p) { return *p; } 92 93 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t* p) { return *p; } 94 inline void* OrderAccess::load_ptr_acquire(volatile void* p) { return *(void* volatile *)p; } 95 inline void* OrderAccess::load_ptr_acquire(const volatile void* p) { return *(void* const volatile *)p; } 96 97 inline void OrderAccess::release_store(volatile jbyte* p, jbyte v) { *p = v; } 98 inline void OrderAccess::release_store(volatile jshort* p, jshort v) { *p = v; } 99 inline void OrderAccess::release_store(volatile jint* p, jint v) { *p = v; } 100 inline void OrderAccess::release_store(volatile jlong* p, jlong v) { Atomic::store(v, p); } 101 inline void OrderAccess::release_store(volatile jubyte* p, jubyte v) { *p = v; } 102 inline void OrderAccess::release_store(volatile jushort* p, jushort v) { *p = v; } 103 inline void OrderAccess::release_store(volatile juint* p, juint v) { *p = v; } 104 inline void OrderAccess::release_store(volatile julong* p, julong v) { Atomic::store((jlong)v, (volatile jlong*)p); } 105 inline void OrderAccess::release_store(volatile jfloat* p, jfloat v) { *p = v; } 106 inline void OrderAccess::release_store(volatile jdouble* p, jdouble v) { *p = v; } 107 108 inline void OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; } 109 inline void OrderAccess::release_store_ptr(volatile void* p, void* v) { *(void* volatile *)p = v; } 110 111 inline void OrderAccess::store_fence(jbyte* p, jbyte v) { *p = v; fence(); } 112 inline void OrderAccess::store_fence(jshort* p, jshort v) { *p = v; fence(); } 113 inline void OrderAccess::store_fence(jint* p, jint v) { *p = v; fence(); } 114 inline void OrderAccess::store_fence(jlong* p, jlong v) { *p = v; fence(); } 115 inline void OrderAccess::store_fence(jubyte* p, jubyte v) { *p = v; fence(); } 116 inline void OrderAccess::store_fence(jushort* p, jushort v) { *p = v; fence(); } 117 inline void OrderAccess::store_fence(juint* p, juint v) { *p = v; fence(); } 118 inline void OrderAccess::store_fence(julong* p, julong v) { *p = v; fence(); } 119 inline void OrderAccess::store_fence(jfloat* p, jfloat v) { *p = v; fence(); } 120 inline void OrderAccess::store_fence(jdouble* p, jdouble v) { *p = v; fence(); } 121 122 inline void OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) { *p = v; fence(); } 123 inline void OrderAccess::store_ptr_fence(void** p, void* v) { *p = v; fence(); } 124 125 inline void OrderAccess::release_store_fence(volatile jbyte* p, jbyte v) { *p = v; fence(); } 126 inline void OrderAccess::release_store_fence(volatile jshort* p, jshort v) { *p = v; fence(); } 127 inline void OrderAccess::release_store_fence(volatile jint* p, jint v) { *p = v; fence(); } 128 inline void OrderAccess::release_store_fence(volatile jlong* p, jlong v) { release_store(p, v); fence(); } 129 inline void OrderAccess::release_store_fence(volatile jubyte* p, jubyte v) { *p = v; fence(); } 130 inline void OrderAccess::release_store_fence(volatile jushort* p, jushort v) { *p = v; fence(); } 131 inline void OrderAccess::release_store_fence(volatile juint* p, juint v) { *p = v; fence(); } 132 inline void OrderAccess::release_store_fence(volatile julong* p, julong v) { release_store(p, v); fence(); } 133 inline void OrderAccess::release_store_fence(volatile jfloat* p, jfloat v) { *p = v; fence(); } 134 inline void OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { *p = v; fence(); } 135 136 inline void OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { *p = v; fence(); } 137 inline 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