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