3960
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1 /*
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2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef OS_CPU_BSD_X86_VM_ATOMIC_BSD_X86_INLINE_HPP
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26 #define OS_CPU_BSD_X86_VM_ATOMIC_BSD_X86_INLINE_HPP
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27
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28 #include "orderAccess_bsd_x86.inline.hpp"
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29 #include "runtime/atomic.hpp"
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30 #include "runtime/os.hpp"
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31 #include "vm_version_x86.hpp"
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32
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33 // Implementation of class atomic
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34
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35 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; }
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36 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; }
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37 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; }
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38 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
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39 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; }
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40
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41 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; }
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42 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; }
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43 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; }
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44 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
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45 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; }
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46
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47
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48 // Adding a lock prefix to an instruction on MP machine
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49 #define LOCK_IF_MP(mp) "cmp $0, " #mp "; je 1f; lock; 1: "
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50
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51 inline jint Atomic::add (jint add_value, volatile jint* dest) {
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52 jint addend = add_value;
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53 int mp = os::is_MP();
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54 __asm__ volatile ( LOCK_IF_MP(%3) "xaddl %0,(%2)"
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55 : "=r" (addend)
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56 : "0" (addend), "r" (dest), "r" (mp)
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57 : "cc", "memory");
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58 return addend + add_value;
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59 }
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60
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61 inline void Atomic::inc (volatile jint* dest) {
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62 int mp = os::is_MP();
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63 __asm__ volatile (LOCK_IF_MP(%1) "addl $1,(%0)" :
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64 : "r" (dest), "r" (mp) : "cc", "memory");
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65 }
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66
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67 inline void Atomic::inc_ptr(volatile void* dest) {
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68 inc_ptr((volatile intptr_t*)dest);
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69 }
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70
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71 inline void Atomic::dec (volatile jint* dest) {
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72 int mp = os::is_MP();
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73 __asm__ volatile (LOCK_IF_MP(%1) "subl $1,(%0)" :
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74 : "r" (dest), "r" (mp) : "cc", "memory");
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75 }
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76
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77 inline void Atomic::dec_ptr(volatile void* dest) {
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78 dec_ptr((volatile intptr_t*)dest);
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79 }
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80
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81 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
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82 __asm__ volatile ( "xchgl (%2),%0"
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83 : "=r" (exchange_value)
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84 : "0" (exchange_value), "r" (dest)
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85 : "memory");
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86 return exchange_value;
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87 }
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88
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89 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
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90 return (void*)xchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest);
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91 }
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92
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93
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94 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) {
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95 int mp = os::is_MP();
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96 __asm__ volatile (LOCK_IF_MP(%4) "cmpxchgl %1,(%3)"
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97 : "=a" (exchange_value)
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98 : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp)
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99 : "cc", "memory");
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100 return exchange_value;
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101 }
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102
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103 #ifdef AMD64
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104 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
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105 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
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106
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107 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
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108 intptr_t addend = add_value;
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109 bool mp = os::is_MP();
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110 __asm__ __volatile__ (LOCK_IF_MP(%3) "xaddq %0,(%2)"
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111 : "=r" (addend)
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112 : "0" (addend), "r" (dest), "r" (mp)
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113 : "cc", "memory");
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114 return addend + add_value;
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115 }
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116
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117 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
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118 return (void*)add_ptr(add_value, (volatile intptr_t*)dest);
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119 }
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120
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121 inline void Atomic::inc_ptr(volatile intptr_t* dest) {
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122 bool mp = os::is_MP();
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123 __asm__ __volatile__ (LOCK_IF_MP(%1) "addq $1,(%0)"
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124 :
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125 : "r" (dest), "r" (mp)
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126 : "cc", "memory");
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127 }
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128
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129 inline void Atomic::dec_ptr(volatile intptr_t* dest) {
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130 bool mp = os::is_MP();
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131 __asm__ __volatile__ (LOCK_IF_MP(%1) "subq $1,(%0)"
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132 :
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133 : "r" (dest), "r" (mp)
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134 : "cc", "memory");
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135 }
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136
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137 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
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138 __asm__ __volatile__ ("xchgq (%2),%0"
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139 : "=r" (exchange_value)
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140 : "0" (exchange_value), "r" (dest)
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141 : "memory");
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142 return exchange_value;
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143 }
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144
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145 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
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146 bool mp = os::is_MP();
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147 __asm__ __volatile__ (LOCK_IF_MP(%4) "cmpxchgq %1,(%3)"
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148 : "=a" (exchange_value)
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149 : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp)
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150 : "cc", "memory");
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151 return exchange_value;
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152 }
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153
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154 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
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155 return (intptr_t)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value);
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156 }
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157
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158 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
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159 return (void*)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value);
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160 }
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161
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162 inline jlong Atomic::load(volatile jlong* src) { return *src; }
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163
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164 #else // !AMD64
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165
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166 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
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167 return (intptr_t)Atomic::add((jint)add_value, (volatile jint*)dest);
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168 }
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169
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170 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
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171 return (void*)Atomic::add((jint)add_value, (volatile jint*)dest);
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172 }
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173
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174
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175 inline void Atomic::inc_ptr(volatile intptr_t* dest) {
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176 inc((volatile jint*)dest);
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177 }
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178
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179 inline void Atomic::dec_ptr(volatile intptr_t* dest) {
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180 dec((volatile jint*)dest);
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181 }
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182
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183 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
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184 return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest);
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185 }
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186
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187 extern "C" {
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188 // defined in bsd_x86.s
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189 jlong _Atomic_cmpxchg_long(jlong, volatile jlong*, jlong, bool);
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190 void _Atomic_move_long(volatile jlong* src, volatile jlong* dst);
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191 }
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192
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193 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
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194 return _Atomic_cmpxchg_long(exchange_value, dest, compare_value, os::is_MP());
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195 }
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196
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197 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
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198 return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
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199 }
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200
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201 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
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202 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
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203 }
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204
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205 inline jlong Atomic::load(volatile jlong* src) {
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206 volatile jlong dest;
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207 _Atomic_move_long(src, &dest);
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208 return dest;
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209 }
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210
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211 inline void Atomic::store(jlong store_value, jlong* dest) {
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212 _Atomic_move_long((volatile jlong*)&store_value, (volatile jlong*)dest);
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213 }
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214
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215 inline void Atomic::store(jlong store_value, volatile jlong* dest) {
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216 _Atomic_move_long((volatile jlong*)&store_value, dest);
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217 }
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218
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219 #endif // AMD64
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220
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221 #endif // OS_CPU_BSD_X86_VM_ATOMIC_BSD_X86_INLINE_HPP
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