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1 /*
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2 * Copyright 1999-2007 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 // Implementation of class atomic
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26
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27 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; }
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28 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; }
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29 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; }
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30 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
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31 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
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32 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; }
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33
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34 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; }
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35 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; }
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36 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; }
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37 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
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38 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
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39 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; }
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40
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41 inline void Atomic::inc (volatile jint* dest) { (void)add (1, dest); }
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42 inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); }
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43 inline void Atomic::inc_ptr(volatile void* dest) { (void)add_ptr(1, dest); }
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44
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45 inline void Atomic::dec (volatile jint* dest) { (void)add (-1, dest); }
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46 inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); }
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47 inline void Atomic::dec_ptr(volatile void* dest) { (void)add_ptr(-1, dest); }
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48
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49 inline jlong Atomic::load(volatile jlong* src) { return *src; }
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50
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0
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51 #ifdef _GNU_SOURCE
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52
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53 inline jint Atomic::add (jint add_value, volatile jint* dest) {
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54 intptr_t rv;
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55 __asm__ volatile(
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56 "1: \n\t"
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57 " ld [%2], %%o2\n\t"
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58 " add %1, %%o2, %%o3\n\t"
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59 " cas [%2], %%o2, %%o3\n\t"
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60 " cmp %%o2, %%o3\n\t"
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61 " bne 1b\n\t"
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62 " nop\n\t"
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63 " add %1, %%o2, %0\n\t"
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64 : "=r" (rv)
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65 : "r" (add_value), "r" (dest)
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66 : "memory", "o2", "o3");
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67 return rv;
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68 }
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69
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70 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
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71 intptr_t rv;
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72 #ifdef _LP64
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73 __asm__ volatile(
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74 "1: \n\t"
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75 " ldx [%2], %%o2\n\t"
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76 " add %0, %%o2, %%o3\n\t"
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77 " casx [%2], %%o2, %%o3\n\t"
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78 " cmp %%o2, %%o3\n\t"
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79 " bne %%xcc, 1b\n\t"
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80 " nop\n\t"
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81 " add %0, %%o2, %0\n\t"
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82 : "=r" (rv)
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83 : "r" (add_value), "r" (dest)
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84 : "memory", "o2", "o3");
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85 #else //_LP64
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86 __asm__ volatile(
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87 "1: \n\t"
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88 " ld [%2], %%o2\n\t"
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89 " add %1, %%o2, %%o3\n\t"
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90 " cas [%2], %%o2, %%o3\n\t"
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91 " cmp %%o2, %%o3\n\t"
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92 " bne 1b\n\t"
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93 " nop\n\t"
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94 " add %1, %%o2, %0\n\t"
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95 : "=r" (rv)
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96 : "r" (add_value), "r" (dest)
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97 : "memory", "o2", "o3");
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98 #endif // _LP64
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99 return rv;
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100 }
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101
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102 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
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103 return (void*)add_ptr((intptr_t)add_value, (volatile intptr_t*)dest);
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104 }
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105
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106
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107 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
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108 intptr_t rv = exchange_value;
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109 __asm__ volatile(
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110 " swap [%2],%1\n\t"
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111 : "=r" (rv)
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112 : "0" (exchange_value) /* we use same register as for return value */, "r" (dest)
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113 : "memory");
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114 return rv;
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115 }
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116
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117 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
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118 intptr_t rv = exchange_value;
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119 #ifdef _LP64
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120 __asm__ volatile(
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121 "1:\n\t"
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122 " mov %1, %%o3\n\t"
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123 " ldx [%2], %%o2\n\t"
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124 " casx [%2], %%o2, %%o3\n\t"
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125 " cmp %%o2, %%o3\n\t"
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126 " bne %%xcc, 1b\n\t"
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127 " nop\n\t"
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128 " mov %%o2, %0\n\t"
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129 : "=r" (rv)
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130 : "r" (exchange_value), "r" (dest)
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131 : "memory", "o2", "o3");
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132 #else //_LP64
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133 __asm__ volatile(
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134 "swap [%2],%1\n\t"
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135 : "=r" (rv)
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136 : "0" (exchange_value) /* we use same register as for return value */, "r" (dest)
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137 : "memory");
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138 #endif // _LP64
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139 return rv;
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140 }
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141
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142 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
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143 return (void*)xchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest);
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144 }
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145
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146
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147 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) {
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148 jint rv;
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149 __asm__ volatile(
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150 " cas [%2], %3, %0"
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151 : "=r" (rv)
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152 : "0" (exchange_value), "r" (dest), "r" (compare_value)
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153 : "memory");
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154 return rv;
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155 }
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156
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157 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
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158 #ifdef _LP64
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159 jlong rv;
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160 __asm__ volatile(
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161 " casx [%2], %3, %0"
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162 : "=r" (rv)
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163 : "0" (exchange_value), "r" (dest), "r" (compare_value)
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164 : "memory");
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165 return rv;
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166 #else //_LP64
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167 assert(VM_Version::v9_instructions_work(), "cas only supported on v9");
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168 volatile jlong_accessor evl, cvl, rv;
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169 evl.long_value = exchange_value;
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170 cvl.long_value = compare_value;
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171
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172 __asm__ volatile(
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173 " sllx %2, 32, %2\n\t"
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174 " srl %3, 0, %3\n\t"
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175 " or %2, %3, %2\n\t"
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176 " sllx %5, 32, %5\n\t"
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177 " srl %6, 0, %6\n\t"
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178 " or %5, %6, %5\n\t"
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179 " casx [%4], %5, %2\n\t"
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180 " srl %2, 0, %1\n\t"
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181 " srlx %2, 32, %0\n\t"
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182 : "=r" (rv.words[0]), "=r" (rv.words[1])
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183 : "r" (evl.words[0]), "r" (evl.words[1]), "r" (dest), "r" (cvl.words[0]), "r" (cvl.words[1])
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184 : "memory");
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185
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186 return rv.long_value;
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187 #endif //_LP64
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188 }
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189
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190 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
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191 intptr_t rv;
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192 #ifdef _LP64
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193 __asm__ volatile(
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194 " casx [%2], %3, %0"
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195 : "=r" (rv)
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196 : "0" (exchange_value), "r" (dest), "r" (compare_value)
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197 : "memory");
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198 #else //_LP64
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199 __asm__ volatile(
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200 " cas [%2], %3, %0"
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201 : "=r" (rv)
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202 : "0" (exchange_value), "r" (dest), "r" (compare_value)
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203 : "memory");
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204 #endif // _LP64
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205 return rv;
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206 }
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207
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208 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
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209 return (void*)cmpxchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest, (intptr_t)compare_value);
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210 }
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211
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212 #else // _GNU_SOURCE
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213
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214 #if defined(COMPILER2) || defined(_LP64)
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215
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216 // This is the interface to the atomic instructions in solaris_sparc.il.
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217 // It's very messy because we need to support v8 and these instructions
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218 // are illegal there. When sparc v8 is dropped, we can drop out lots of
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219 // this code. Also compiler2 does not support v8 so the conditional code
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220 // omits the instruction set check.
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221
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222 extern "C" jint _Atomic_swap32(jint exchange_value, volatile jint* dest);
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223 extern "C" intptr_t _Atomic_swap64(intptr_t exchange_value, volatile intptr_t* dest);
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224
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225 extern "C" jint _Atomic_cas32(jint exchange_value, volatile jint* dest, jint compare_value);
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226 extern "C" intptr_t _Atomic_cas64(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value);
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227 extern "C" jlong _Atomic_casl (jlong exchange_value, volatile jlong* dest, jlong compare_value);
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228
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229 extern "C" jint _Atomic_add32(jint inc, volatile jint* dest);
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230 extern "C" intptr_t _Atomic_add64(intptr_t add_value, volatile intptr_t* dest);
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231
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232
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233 inline jint Atomic::add (jint add_value, volatile jint* dest) {
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234 return _Atomic_add32(add_value, dest);
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235 }
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236
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237 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
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238 #ifdef _LP64
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239 return _Atomic_add64(add_value, dest);
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240 #else //_LP64
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241 return _Atomic_add32(add_value, dest);
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242 #endif // _LP64
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243 }
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244
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245 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
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246 return (void*)add_ptr((intptr_t)add_value, (volatile intptr_t*)dest);
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247 }
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248
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249
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250 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
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251 return _Atomic_swap32(exchange_value, dest);
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252 }
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253
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254 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
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255 #ifdef _LP64
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256 return _Atomic_swap64(exchange_value, dest);
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257 #else // _LP64
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258 return _Atomic_swap32(exchange_value, dest);
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259 #endif // _LP64
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260 }
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261
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262 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
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263 return (void*)xchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest);
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264 }
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265
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266
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267 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) {
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268 return _Atomic_cas32(exchange_value, dest, compare_value);
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269 }
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270
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271 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
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272 #ifdef _LP64
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273 // Return 64 bit value in %o0
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274 return _Atomic_cas64((intptr_t)exchange_value, (intptr_t *)dest, (intptr_t)compare_value);
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275 #else // _LP64
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276 assert (VM_Version::v9_instructions_work(), "only supported on v9");
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277 // Return 64 bit value in %o0,%o1 by hand
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278 return _Atomic_casl(exchange_value, dest, compare_value);
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279 #endif // _LP64
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280 }
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281
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282 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
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283 #ifdef _LP64
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284 return _Atomic_cas64(exchange_value, dest, compare_value);
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285 #else // _LP64
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286 return _Atomic_cas32(exchange_value, dest, compare_value);
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287 #endif // _LP64
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288 }
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289
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290 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
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291 return (void*)cmpxchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest, (intptr_t)compare_value);
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292 }
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293
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294
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295 #else // _LP64 || COMPILER2
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296
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297
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298 // 32-bit compiler1 only
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299
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300 inline jint Atomic::add (jint add_value, volatile jint* dest) {
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301 return (*os::atomic_add_func)(add_value, dest);
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302 }
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303
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304 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
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305 return (intptr_t)add((jint)add_value, (volatile jint*)dest);
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306 }
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307
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308 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
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309 return (void*)add((jint)add_value, (volatile jint*)dest);
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310 }
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311
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312
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313 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
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314 return (*os::atomic_xchg_func)(exchange_value, dest);
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315 }
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316
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317 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
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318 return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest);
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319 }
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320
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321 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
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322 return (void*)xchg((jint)exchange_value, (volatile jint*)dest);
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323 }
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324
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325
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326 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) {
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327 return (*os::atomic_cmpxchg_func)(exchange_value, dest, compare_value);
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328 }
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329
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330 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
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331 return (*os::atomic_cmpxchg_long_func)(exchange_value, dest, compare_value);
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332 }
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333
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334 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
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335 return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
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336 }
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337
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338 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
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339 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
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340 }
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341
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342 #endif // _LP64 || COMPILER2
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343
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344 #endif // _GNU_SOURCE
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