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0
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1 /*
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2 * Copyright 2004-2006 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 # include "incls/_precompiled.incl"
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26 # include "incls/_jniFastGetField_x86_32.cpp.incl"
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27
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28 #define __ masm->
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29
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30 #define BUFFER_SIZE 30
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31
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32 #ifdef _WINDOWS
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33 GetBooleanField_t JNI_FastGetField::jni_fast_GetBooleanField_fp;
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34 GetByteField_t JNI_FastGetField::jni_fast_GetByteField_fp;
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35 GetCharField_t JNI_FastGetField::jni_fast_GetCharField_fp;
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36 GetShortField_t JNI_FastGetField::jni_fast_GetShortField_fp;
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37 GetIntField_t JNI_FastGetField::jni_fast_GetIntField_fp;
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38 GetLongField_t JNI_FastGetField::jni_fast_GetLongField_fp;
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39 GetFloatField_t JNI_FastGetField::jni_fast_GetFloatField_fp;
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40 GetDoubleField_t JNI_FastGetField::jni_fast_GetDoubleField_fp;
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41 #endif
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42
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43 // Instead of issuing lfence for LoadLoad barrier, we create data dependency
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44 // between loads, which is much more efficient than lfence.
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45
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46 address JNI_FastGetField::generate_fast_get_int_field0(BasicType type) {
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47 const char *name;
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48 switch (type) {
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49 case T_BOOLEAN: name = "jni_fast_GetBooleanField"; break;
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50 case T_BYTE: name = "jni_fast_GetByteField"; break;
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51 case T_CHAR: name = "jni_fast_GetCharField"; break;
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52 case T_SHORT: name = "jni_fast_GetShortField"; break;
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53 case T_INT: name = "jni_fast_GetIntField"; break;
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54 default: ShouldNotReachHere();
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55 }
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56 ResourceMark rm;
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57 BufferBlob* b = BufferBlob::create(name, BUFFER_SIZE*wordSize);
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58 address fast_entry = b->instructions_begin();
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59 CodeBuffer cbuf(fast_entry, b->instructions_size());
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60 MacroAssembler* masm = new MacroAssembler(&cbuf);
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61
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62 Label slow;
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63
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64 // stack layout: offset from rsp (in words):
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65 // return pc 0
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66 // jni env 1
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67 // obj 2
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68 // jfieldID 3
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69
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70 ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
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71 __ mov32 (rcx, counter);
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72 __ testb (rcx, 1);
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73 __ jcc (Assembler::notZero, slow);
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74 if (os::is_MP()) {
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75 __ movl (rax, rcx);
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76 __ andl (rax, 1); // rax, must end up 0
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77 __ movl (rdx, Address(rsp, rax, Address::times_1, 2*wordSize));
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78 // obj, notice rax, is 0.
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79 // rdx is data dependent on rcx.
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80 } else {
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81 __ movl (rdx, Address(rsp, 2*wordSize)); // obj
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82 }
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83 __ movl (rax, Address(rsp, 3*wordSize)); // jfieldID
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84 __ movl (rdx, Address(rdx, 0)); // *obj
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85 __ shrl (rax, 2); // offset
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86
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87 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
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88 speculative_load_pclist[count] = __ pc();
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89 switch (type) {
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90 case T_BOOLEAN: __ movzxb (rax, Address(rdx, rax, Address::times_1)); break;
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91 case T_BYTE: __ movsxb (rax, Address(rdx, rax, Address::times_1)); break;
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92 case T_CHAR: __ movzxw (rax, Address(rdx, rax, Address::times_1)); break;
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93 case T_SHORT: __ movsxw (rax, Address(rdx, rax, Address::times_1)); break;
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94 case T_INT: __ movl (rax, Address(rdx, rax, Address::times_1)); break;
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95 default: ShouldNotReachHere();
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96 }
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97
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98 Address ca1;
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99 if (os::is_MP()) {
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100 __ lea(rdx, counter);
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101 __ xorl(rdx, rax);
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102 __ xorl(rdx, rax);
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103 __ cmp32(rcx, Address(rdx, 0));
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104 // ca1 is the same as ca because
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105 // rax, ^ counter_addr ^ rax, = address
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106 // ca1 is data dependent on rax,.
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107 } else {
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108 __ cmp32(rcx, counter);
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109 }
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110 __ jcc (Assembler::notEqual, slow);
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111
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112 #ifndef _WINDOWS
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113 __ ret (0);
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114 #else
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115 // __stdcall calling convention
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116 __ ret (3*wordSize);
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117 #endif
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118
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119 slowcase_entry_pclist[count++] = __ pc();
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120 __ bind (slow);
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121 address slow_case_addr;
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122 switch (type) {
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123 case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break;
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124 case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break;
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125 case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break;
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126 case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break;
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127 case T_INT: slow_case_addr = jni_GetIntField_addr();
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128 }
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129 // tail call
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130 __ jump (ExternalAddress(slow_case_addr));
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131
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132 __ flush ();
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133
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134 #ifndef _WINDOWS
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135 return fast_entry;
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136 #else
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137 switch (type) {
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138 case T_BOOLEAN: jni_fast_GetBooleanField_fp = (GetBooleanField_t)fast_entry; break;
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139 case T_BYTE: jni_fast_GetByteField_fp = (GetByteField_t)fast_entry; break;
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140 case T_CHAR: jni_fast_GetCharField_fp = (GetCharField_t)fast_entry; break;
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141 case T_SHORT: jni_fast_GetShortField_fp = (GetShortField_t)fast_entry; break;
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142 case T_INT: jni_fast_GetIntField_fp = (GetIntField_t)fast_entry;
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143 }
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144 return os::win32::fast_jni_accessor_wrapper(type);
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145 #endif
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146 }
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147
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148 address JNI_FastGetField::generate_fast_get_boolean_field() {
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149 return generate_fast_get_int_field0(T_BOOLEAN);
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150 }
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151
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152 address JNI_FastGetField::generate_fast_get_byte_field() {
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153 return generate_fast_get_int_field0(T_BYTE);
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154 }
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155
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156 address JNI_FastGetField::generate_fast_get_char_field() {
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157 return generate_fast_get_int_field0(T_CHAR);
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158 }
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159
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160 address JNI_FastGetField::generate_fast_get_short_field() {
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161 return generate_fast_get_int_field0(T_SHORT);
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162 }
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163
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164 address JNI_FastGetField::generate_fast_get_int_field() {
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165 return generate_fast_get_int_field0(T_INT);
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166 }
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167
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168 address JNI_FastGetField::generate_fast_get_long_field() {
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169 const char *name = "jni_fast_GetLongField";
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170 ResourceMark rm;
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171 BufferBlob* b = BufferBlob::create(name, BUFFER_SIZE*wordSize);
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172 address fast_entry = b->instructions_begin();
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173 CodeBuffer cbuf(fast_entry, b->instructions_size());
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174 MacroAssembler* masm = new MacroAssembler(&cbuf);
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175
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176 Label slow;
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177
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178 // stack layout: offset from rsp (in words):
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179 // old rsi 0
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180 // return pc 1
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181 // jni env 2
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182 // obj 3
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183 // jfieldID 4
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184
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185 ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
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186
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187 __ pushl (rsi);
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188 __ mov32 (rcx, counter);
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189 __ testb (rcx, 1);
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190 __ jcc (Assembler::notZero, slow);
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191 if (os::is_MP()) {
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192 __ movl (rax, rcx);
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193 __ andl (rax, 1); // rax, must end up 0
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194 __ movl (rdx, Address(rsp, rax, Address::times_1, 3*wordSize));
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195 // obj, notice rax, is 0.
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196 // rdx is data dependent on rcx.
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197 } else {
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198 __ movl (rdx, Address(rsp, 3*wordSize)); // obj
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199 }
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200 __ movl (rsi, Address(rsp, 4*wordSize)); // jfieldID
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201 __ movl (rdx, Address(rdx, 0)); // *obj
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202 __ shrl (rsi, 2); // offset
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203
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204 assert(count < LIST_CAPACITY-1, "LIST_CAPACITY too small");
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205 speculative_load_pclist[count++] = __ pc();
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206 __ movl (rax, Address(rdx, rsi, Address::times_1));
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207 speculative_load_pclist[count] = __ pc();
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208 __ movl (rdx, Address(rdx, rsi, Address::times_1, 4));
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209
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210 if (os::is_MP()) {
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211 __ lea (rsi, counter);
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212 __ xorl (rsi, rdx);
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213 __ xorl (rsi, rax);
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214 __ xorl (rsi, rdx);
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215 __ xorl (rsi, rax);
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216 __ cmp32(rcx, Address(rsi, 0));
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217 // ca1 is the same as ca because
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218 // rax, ^ rdx ^ counter_addr ^ rax, ^ rdx = address
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219 // ca1 is data dependent on both rax, and rdx.
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220 } else {
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221 __ cmp32(rcx, counter);
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222 }
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223 __ jcc (Assembler::notEqual, slow);
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224
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225 __ popl (rsi);
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226
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227 #ifndef _WINDOWS
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228 __ ret (0);
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229 #else
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230 // __stdcall calling convention
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231 __ ret (3*wordSize);
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232 #endif
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233
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234 slowcase_entry_pclist[count-1] = __ pc();
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235 slowcase_entry_pclist[count++] = __ pc();
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236 __ bind (slow);
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237 __ popl (rsi);
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238 address slow_case_addr = jni_GetLongField_addr();;
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239 // tail call
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240 __ jump (ExternalAddress(slow_case_addr));
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241
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242 __ flush ();
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243
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244 #ifndef _WINDOWS
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245 return fast_entry;
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246 #else
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247 jni_fast_GetLongField_fp = (GetLongField_t)fast_entry;
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248 return os::win32::fast_jni_accessor_wrapper(T_LONG);
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249 #endif
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250 }
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251
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252 address JNI_FastGetField::generate_fast_get_float_field0(BasicType type) {
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253 const char *name;
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254 switch (type) {
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255 case T_FLOAT: name = "jni_fast_GetFloatField"; break;
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256 case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
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257 default: ShouldNotReachHere();
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258 }
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259 ResourceMark rm;
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260 BufferBlob* b = BufferBlob::create(name, BUFFER_SIZE*wordSize);
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261 address fast_entry = b->instructions_begin();
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262 CodeBuffer cbuf(fast_entry, b->instructions_size());
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263 MacroAssembler* masm = new MacroAssembler(&cbuf);
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264
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265 Label slow_with_pop, slow;
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266
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267 // stack layout: offset from rsp (in words):
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268 // return pc 0
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269 // jni env 1
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270 // obj 2
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271 // jfieldID 3
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272
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273 ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
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274
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275 __ mov32 (rcx, counter);
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276 __ testb (rcx, 1);
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277 __ jcc (Assembler::notZero, slow);
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278 if (os::is_MP()) {
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279 __ movl (rax, rcx);
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280 __ andl (rax, 1); // rax, must end up 0
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281 __ movl (rdx, Address(rsp, rax, Address::times_1, 2*wordSize));
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282 // obj, notice rax, is 0.
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283 // rdx is data dependent on rcx.
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284 } else {
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285 __ movl (rdx, Address(rsp, 2*wordSize)); // obj
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286 }
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287 __ movl (rax, Address(rsp, 3*wordSize)); // jfieldID
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288 __ movl (rdx, Address(rdx, 0)); // *obj
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289 __ shrl (rax, 2); // offset
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290
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291 assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
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292 speculative_load_pclist[count] = __ pc();
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293 switch (type) {
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294 case T_FLOAT: __ fld_s (Address(rdx, rax, Address::times_1)); break;
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295 case T_DOUBLE: __ fld_d (Address(rdx, rax, Address::times_1)); break;
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296 default: ShouldNotReachHere();
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297 }
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298
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299 Address ca1;
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300 if (os::is_MP()) {
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301 __ fst_s (Address(rsp, -4));
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302 __ lea(rdx, counter);
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303 __ movl (rax, Address(rsp, -4));
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304 __ xorl(rdx, rax);
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305 __ xorl(rdx, rax);
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306 __ cmp32(rcx, Address(rdx, 0));
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307 // rax, ^ counter_addr ^ rax, = address
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308 // ca1 is data dependent on the field
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309 // access.
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310 } else {
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311 __ cmp32(rcx, counter);
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312 }
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313 __ jcc (Assembler::notEqual, slow_with_pop);
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314
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315 #ifndef _WINDOWS
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316 __ ret (0);
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317 #else
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318 // __stdcall calling convention
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319 __ ret (3*wordSize);
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320 #endif
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321
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322 __ bind (slow_with_pop);
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323 // invalid load. pop FPU stack.
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324 __ fstp_d (0);
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325
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326 slowcase_entry_pclist[count++] = __ pc();
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327 __ bind (slow);
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328 address slow_case_addr;
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329 switch (type) {
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330 case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break;
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331 case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr(); break;
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332 default: ShouldNotReachHere();
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333 }
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334 // tail call
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335 __ jump (ExternalAddress(slow_case_addr));
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336
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337 __ flush ();
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338
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339 #ifndef _WINDOWS
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340 return fast_entry;
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341 #else
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342 switch (type) {
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343 case T_FLOAT: jni_fast_GetFloatField_fp = (GetFloatField_t)fast_entry; break;
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344 case T_DOUBLE: jni_fast_GetDoubleField_fp = (GetDoubleField_t)fast_entry;
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345 }
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346 return os::win32::fast_jni_accessor_wrapper(type);
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347 #endif
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348 }
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349
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350 address JNI_FastGetField::generate_fast_get_float_field() {
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351 return generate_fast_get_float_field0(T_FLOAT);
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352 }
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353
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354 address JNI_FastGetField::generate_fast_get_double_field() {
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355 return generate_fast_get_float_field0(T_DOUBLE);
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356 }
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