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annotate src/os_cpu/solaris_x86/vm/atomic_solaris_x86.inline.hpp @ 21947:9f70fc90169d

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Truffle: remove expensive assertion
author Andreas Woess <andreas.woess@oracle.com>
date Wed, 17 Jun 2015 04:09:30 +0200
parents 63e54c37ac64
children
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1 /*
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2 * Copyright (c) 1999, 2013, 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_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_INLINE_HPP
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26 #define OS_CPU_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_INLINE_HPP
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27
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28 #include "runtime/atomic.hpp"
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29 #include "runtime/os.hpp"
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30 #include "vm_version_x86.hpp"
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31
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32 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; }
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33 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; }
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34 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; }
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35
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36
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37 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
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38 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; }
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39
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40 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; }
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41 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; }
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42 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; }
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43 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
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44 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; }
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45
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46 inline void Atomic::inc (volatile jint* dest) { (void)add (1, dest); }
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47 inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); }
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48 inline void Atomic::inc_ptr(volatile void* dest) { (void)add_ptr(1, dest); }
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49
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50 inline void Atomic::dec (volatile jint* dest) { (void)add (-1, dest); }
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51 inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); }
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52 inline void Atomic::dec_ptr(volatile void* dest) { (void)add_ptr(-1, dest); }
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53
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54 // For Sun Studio - implementation is in solaris_x86_[32/64].il.
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55 // For gcc - implementation is just below.
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56
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57 // The lock prefix can be omitted for certain instructions on uniprocessors; to
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58 // facilitate this, os::is_MP() is passed as an additional argument. 64-bit
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59 // processors are assumed to be multi-threaded and/or multi-core, so the extra
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60 // argument is unnecessary.
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61 #ifndef _LP64
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62 #define IS_MP_DECL() , int is_mp
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63 #define IS_MP_ARG() , (int) os::is_MP()
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64 #else
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65 #define IS_MP_DECL()
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66 #define IS_MP_ARG()
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67 #endif // _LP64
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68
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69 extern "C" {
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70 jint _Atomic_add(jint add_value, volatile jint* dest IS_MP_DECL());
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71 jint _Atomic_xchg(jint exchange_value, volatile jint* dest);
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72 jint _Atomic_cmpxchg(jint exchange_value, volatile jint* dest,
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73 jint compare_value IS_MP_DECL());
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74 jlong _Atomic_cmpxchg_long(jlong exchange_value, volatile jlong* dest,
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75 jlong compare_value IS_MP_DECL());
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76 }
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78 inline jint Atomic::add (jint add_value, volatile jint* dest) {
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79 return _Atomic_add(add_value, dest IS_MP_ARG());
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80 }
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81
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82 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
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83 return _Atomic_xchg(exchange_value, dest);
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84 }
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85
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86 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) {
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87 return _Atomic_cmpxchg(exchange_value, dest, compare_value IS_MP_ARG());
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88 }
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89
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90 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
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91 return _Atomic_cmpxchg_long(exchange_value, dest, compare_value IS_MP_ARG());
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92 }
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93
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94
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95 #ifdef AMD64
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96 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
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97 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
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98 extern "C" jlong _Atomic_add_long(jlong add_value, volatile jlong* dest);
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99 extern "C" jlong _Atomic_xchg_long(jlong exchange_value, volatile jlong* dest);
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100
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101 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
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102 return (intptr_t)_Atomic_add_long((jlong)add_value, (volatile jlong*)dest);
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103 }
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104
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105 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
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106 return (void*)_Atomic_add_long((jlong)add_value, (volatile jlong*)dest);
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107 }
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108
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109 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
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110 return (intptr_t)_Atomic_xchg_long((jlong)exchange_value, (volatile jlong*)dest);
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111 }
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112
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113 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
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114 return (void*)_Atomic_xchg_long((jlong)exchange_value, (volatile jlong*)dest);
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115 }
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116
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117 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
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118 return (intptr_t)_Atomic_cmpxchg_long((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value);
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119 }
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120
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121 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
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122 return (void*)_Atomic_cmpxchg_long((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value);
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123 }
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124
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125 inline jlong Atomic::load(volatile jlong* src) { return *src; }
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126
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127 #else // !AMD64
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128
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129 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
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130 return (intptr_t)add((jint)add_value, (volatile jint*)dest);
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131 }
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132
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133 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
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134 return (void*)add((jint)add_value, (volatile jint*)dest);
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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 return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest);
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139 }
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140
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141 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
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142 return (void*)xchg((jint)exchange_value, (volatile jint*)dest);
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143 }
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144
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145 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
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146 return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
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147 }
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148
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149 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
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150 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
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151 }
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152
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153 extern "C" void _Atomic_move_long(volatile jlong* src, volatile jlong* dst);
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154
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155 inline jlong Atomic::load(volatile jlong* src) {
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156 volatile jlong dest;
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157 _Atomic_move_long(src, &dest);
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158 return dest;
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159 }
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160
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161 inline void Atomic::store(jlong store_value, jlong* dest) {
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162 _Atomic_move_long((volatile jlong*)&store_value, (volatile jlong*)dest);
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163 }
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164
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165 inline void Atomic::store(jlong store_value, volatile jlong* dest) {
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166 _Atomic_move_long((volatile jlong*)&store_value, dest);
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167 }
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168
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169 #endif // AMD64
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170
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171 #ifdef _GNU_SOURCE
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172 // Add a lock prefix to an instruction on an MP machine
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173 #define LOCK_IF_MP(mp) "cmp $0, " #mp "; je 1f; lock; 1: "
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174
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175 extern "C" {
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176 inline jint _Atomic_add(jint add_value, volatile jint* dest, int mp) {
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177 jint addend = add_value;
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178 __asm__ volatile ( LOCK_IF_MP(%3) "xaddl %0,(%2)"
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179 : "=r" (addend)
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180 : "0" (addend), "r" (dest), "r" (mp)
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181 : "cc", "memory");
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182 return addend + add_value;
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183 }
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184
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185 #ifdef AMD64
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186 inline jlong _Atomic_add_long(jlong add_value, volatile jlong* dest, int mp) {
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187 intptr_t addend = add_value;
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188 __asm__ __volatile__ (LOCK_IF_MP(%3) "xaddq %0,(%2)"
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189 : "=r" (addend)
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190 : "0" (addend), "r" (dest), "r" (mp)
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191 : "cc", "memory");
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192 return addend + add_value;
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193 }
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194
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195 inline jlong _Atomic_xchg_long(jlong exchange_value, volatile jlong* dest) {
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196 __asm__ __volatile__ ("xchgq (%2),%0"
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197 : "=r" (exchange_value)
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198 : "0" (exchange_value), "r" (dest)
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199 : "memory");
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200 return exchange_value;
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201 }
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202
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203 #endif // AMD64
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204
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205 inline jint _Atomic_xchg(jint exchange_value, volatile jint* dest) {
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206 __asm__ __volatile__ ("xchgl (%2),%0"
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207 : "=r" (exchange_value)
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208 : "0" (exchange_value), "r" (dest)
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209 : "memory");
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210 return exchange_value;
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211 }
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212
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213 inline jint _Atomic_cmpxchg(jint exchange_value, volatile jint* dest, jint compare_value, int mp) {
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214 __asm__ volatile (LOCK_IF_MP(%4) "cmpxchgl %1,(%3)"
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215 : "=a" (exchange_value)
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216 : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp)
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217 : "cc", "memory");
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218 return exchange_value;
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219 }
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220
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221 // This is the interface to the atomic instruction in solaris_i486.s.
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222 jlong _Atomic_cmpxchg_long_gcc(jlong exchange_value, volatile jlong* dest, jlong compare_value, int mp);
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223
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224 inline jlong _Atomic_cmpxchg_long(jlong exchange_value, volatile jlong* dest, jlong compare_value, int mp) {
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225 #ifdef AMD64
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226 __asm__ __volatile__ (LOCK_IF_MP(%4) "cmpxchgq %1,(%3)"
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227 : "=a" (exchange_value)
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228 : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp)
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229 : "cc", "memory");
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230 return exchange_value;
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231 #else
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232 return _Atomic_cmpxchg_long_gcc(exchange_value, dest, compare_value, os::is_MP());
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233
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234 #if 0
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235 // The code below does not work presumably because of the bug in gcc
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236 // The error message says:
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237 // can't find a register in class BREG while reloading asm
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238 // However I want to save this code and later replace _Atomic_cmpxchg_long_gcc
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239 // with such inline asm code:
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240
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241 volatile jlong_accessor evl, cvl, rv;
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242 evl.long_value = exchange_value;
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243 cvl.long_value = compare_value;
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244 int mp = os::is_MP();
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245
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246 __asm__ volatile ("cmp $0, %%esi\n\t"
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247 "je 1f \n\t"
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248 "lock\n\t"
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249 "1: cmpxchg8b (%%edi)\n\t"
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250 : "=a"(cvl.words[0]), "=d"(cvl.words[1])
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251 : "a"(cvl.words[0]), "d"(cvl.words[1]),
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252 "b"(evl.words[0]), "c"(evl.words[1]),
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253 "D"(dest), "S"(mp)
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254 : "cc", "memory");
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255 return cvl.long_value;
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256 #endif // if 0
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257 #endif // AMD64
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258 }
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259 }
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260 #undef LOCK_IF_MP
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261
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262 #endif // _GNU_SOURCE
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263
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264 #endif // OS_CPU_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_INLINE_HPP