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1 /*
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2 * Copyright 2003 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 #pragma warning(disable: 4035) // Disables warnings reporting missing return statement
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26
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27 // Implementation of class OrderAccess.
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28
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29 inline void OrderAccess::loadload() { acquire(); }
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30 inline void OrderAccess::storestore() { release(); }
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31 inline void OrderAccess::loadstore() { acquire(); }
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32 inline void OrderAccess::storeload() { fence(); }
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33
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34 inline void OrderAccess::acquire() {
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35 #ifndef AMD64
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36 __asm {
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37 mov eax, dword ptr [esp];
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38 }
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39 #endif // !AMD64
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40 }
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41
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42 inline void OrderAccess::release() {
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43 // A volatile store has release semantics.
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44 dummy = 0;
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45 }
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46
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47 inline void OrderAccess::fence() {
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48 #ifdef AMD64
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49 (*os::fence_func)();
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50 #else
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51 if (os::is_MP()) {
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52 __asm {
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53 lock add dword ptr [esp], 0;
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54 }
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55 }
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56 #endif // AMD64
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57 }
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58
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59 inline jbyte OrderAccess::load_acquire(volatile jbyte* p) { return *p; }
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60 inline jshort OrderAccess::load_acquire(volatile jshort* p) { return *p; }
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61 inline jint OrderAccess::load_acquire(volatile jint* p) { return *p; }
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62 inline jlong OrderAccess::load_acquire(volatile jlong* p) { return *p; }
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63 inline jubyte OrderAccess::load_acquire(volatile jubyte* p) { return *p; }
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64 inline jushort OrderAccess::load_acquire(volatile jushort* p) { return *p; }
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65 inline juint OrderAccess::load_acquire(volatile juint* p) { return *p; }
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66 inline julong OrderAccess::load_acquire(volatile julong* p) { return *p; }
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67 inline jfloat OrderAccess::load_acquire(volatile jfloat* p) { return *p; }
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68 inline jdouble OrderAccess::load_acquire(volatile jdouble* p) { return *p; }
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69
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70 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t* p) { return *p; }
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71 inline void* OrderAccess::load_ptr_acquire(volatile void* p) { return *(void* volatile *)p; }
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72 inline void* OrderAccess::load_ptr_acquire(const volatile void* p) { return *(void* const volatile *)p; }
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73
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74 inline void OrderAccess::release_store(volatile jbyte* p, jbyte v) { *p = v; }
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75 inline void OrderAccess::release_store(volatile jshort* p, jshort v) { *p = v; }
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76 inline void OrderAccess::release_store(volatile jint* p, jint v) { *p = v; }
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77 inline void OrderAccess::release_store(volatile jlong* p, jlong v) { *p = v; }
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78 inline void OrderAccess::release_store(volatile jubyte* p, jubyte v) { *p = v; }
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79 inline void OrderAccess::release_store(volatile jushort* p, jushort v) { *p = v; }
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80 inline void OrderAccess::release_store(volatile juint* p, juint v) { *p = v; }
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81 inline void OrderAccess::release_store(volatile julong* p, julong v) { *p = v; }
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82 inline void OrderAccess::release_store(volatile jfloat* p, jfloat v) { *p = v; }
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83 inline void OrderAccess::release_store(volatile jdouble* p, jdouble v) { *p = v; }
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84
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85 inline void OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; }
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86 inline void OrderAccess::release_store_ptr(volatile void* p, void* v) { *(void* volatile *)p = v; }
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87
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88 inline void OrderAccess::store_fence(jbyte* p, jbyte v) {
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89 #ifdef AMD64
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90 *p = v; fence();
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91 #else
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92 __asm {
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93 mov edx, p;
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94 mov al, v;
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95 xchg al, byte ptr [edx];
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96 }
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97 #endif // AMD64
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98 }
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99
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100 inline void OrderAccess::store_fence(jshort* p, jshort v) {
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101 #ifdef AMD64
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102 *p = v; fence();
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103 #else
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104 __asm {
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105 mov edx, p;
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106 mov ax, v;
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107 xchg ax, word ptr [edx];
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108 }
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109 #endif // AMD64
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110 }
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111
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112 inline void OrderAccess::store_fence(jint* p, jint v) {
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113 #ifdef AMD64
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114 *p = v; fence();
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115 #else
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116 __asm {
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117 mov edx, p;
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118 mov eax, v;
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119 xchg eax, dword ptr [edx];
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120 }
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121 #endif // AMD64
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122 }
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123
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124 inline void OrderAccess::store_fence(jlong* p, jlong v) { *p = v; fence(); }
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125 inline void OrderAccess::store_fence(jubyte* p, jubyte v) { store_fence((jbyte*)p, (jbyte)v); }
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126 inline void OrderAccess::store_fence(jushort* p, jushort v) { store_fence((jshort*)p, (jshort)v); }
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127 inline void OrderAccess::store_fence(juint* p, juint v) { store_fence((jint*)p, (jint)v); }
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128 inline void OrderAccess::store_fence(julong* p, julong v) { store_fence((jlong*)p, (jlong)v); }
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129 inline void OrderAccess::store_fence(jfloat* p, jfloat v) { *p = v; fence(); }
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130 inline void OrderAccess::store_fence(jdouble* p, jdouble v) { *p = v; fence(); }
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131
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132 inline void OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) {
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133 #ifdef AMD64
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134 *p = v; fence();
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135 #else
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136 store_fence((jint*)p, (jint)v);
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137 #endif // AMD64
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138 }
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139
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140 inline void OrderAccess::store_ptr_fence(void** p, void* v) {
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141 #ifdef AMD64
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142 *p = v; fence();
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143 #else
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144 store_fence((jint*)p, (jint)v);
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145 #endif // AMD64
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146 }
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147
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148 // Must duplicate definitions instead of calling store_fence because we don't want to cast away volatile.
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149 inline void OrderAccess::release_store_fence(volatile jbyte* p, jbyte v) {
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150 #ifdef AMD64
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151 *p = v; fence();
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152 #else
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153 __asm {
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154 mov edx, p;
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155 mov al, v;
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156 xchg al, byte ptr [edx];
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157 }
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158 #endif // AMD64
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159 }
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160
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161 inline void OrderAccess::release_store_fence(volatile jshort* p, jshort v) {
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162 #ifdef AMD64
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163 *p = v; fence();
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164 #else
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165 __asm {
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166 mov edx, p;
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167 mov ax, v;
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168 xchg ax, word ptr [edx];
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169 }
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170 #endif // AMD64
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171 }
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172
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173 inline void OrderAccess::release_store_fence(volatile jint* p, jint v) {
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174 #ifdef AMD64
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175 *p = v; fence();
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176 #else
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177 __asm {
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178 mov edx, p;
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179 mov eax, v;
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180 xchg eax, dword ptr [edx];
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181 }
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182 #endif // AMD64
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183 }
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184
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185 inline void OrderAccess::release_store_fence(volatile jlong* p, jlong v) { *p = v; fence(); }
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186
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187 inline void OrderAccess::release_store_fence(volatile jubyte* p, jubyte v) { release_store_fence((volatile jbyte*)p, (jbyte)v); }
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188 inline void OrderAccess::release_store_fence(volatile jushort* p, jushort v) { release_store_fence((volatile jshort*)p, (jshort)v); }
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189 inline void OrderAccess::release_store_fence(volatile juint* p, juint v) { release_store_fence((volatile jint*)p, (jint)v); }
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190 inline void OrderAccess::release_store_fence(volatile julong* p, julong v) { release_store_fence((volatile jlong*)p, (jlong)v); }
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191 inline void OrderAccess::release_store_fence(volatile jfloat* p, jfloat v) { *p = v; fence(); }
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192 inline void OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { *p = v; fence(); }
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193
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194 inline void OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) {
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195 #ifdef AMD64
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196 *p = v; fence();
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197 #else
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198 release_store_fence((volatile jint*)p, (jint)v);
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199 #endif // AMD64
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200 }
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201
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202 inline void OrderAccess::release_store_ptr_fence(volatile void* p, void* v) {
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203 #ifdef AMD64
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204 *(void* volatile *)p = v; fence();
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205 #else
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206 release_store_fence((volatile jint*)p, (jint)v);
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207 #endif // AMD64
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208 }
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209
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210 #pragma warning(default: 4035) // Enables warnings reporting missing return statement
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