Mercurial > hg > truffle
annotate src/cpu/ppc/vm/interpreter_ppc.cpp @ 17807:71a71b0bc844
8037915: PPC64/AIX: Several smaller fixes
Reviewed-by: kvn
author | goetz |
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date | Thu, 20 Mar 2014 11:03:06 +0100 |
parents | fd1b9f02cc91 |
children | 92aa6797d639 63c5920a038d |
rev | line source |
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1 /* |
17804 | 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
3 * Copyright 2012, 2014 SAP AG. All rights reserved. | |
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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5 * |
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6 * This code is free software; you can redistribute it and/or modify it |
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7 * under the terms of the GNU General Public License version 2 only, as |
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8 * published by the Free Software Foundation. |
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9 * |
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10 * This code is distributed in the hope that it will be useful, but WITHOUT |
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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13 * version 2 for more details (a copy is included in the LICENSE file that |
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14 * accompanied this code). |
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15 * |
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16 * You should have received a copy of the GNU General Public License version |
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17 * 2 along with this work; if not, write to the Free Software Foundation, |
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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19 * |
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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21 * or visit www.oracle.com if you need additional information or have any |
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22 * questions. |
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23 * |
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24 */ |
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25 |
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26 #include "precompiled.hpp" |
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27 #include "asm/assembler.hpp" |
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28 #include "asm/macroAssembler.inline.hpp" |
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29 #include "interpreter/bytecodeHistogram.hpp" |
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30 #include "interpreter/interpreter.hpp" |
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31 #include "interpreter/interpreterGenerator.hpp" |
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32 #include "interpreter/interpreterRuntime.hpp" |
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33 #include "interpreter/templateTable.hpp" |
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34 #include "oops/arrayOop.hpp" |
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35 #include "oops/methodData.hpp" |
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36 #include "oops/method.hpp" |
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37 #include "oops/oop.inline.hpp" |
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38 #include "prims/jvmtiExport.hpp" |
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39 #include "prims/jvmtiThreadState.hpp" |
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40 #include "prims/methodHandles.hpp" |
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41 #include "runtime/arguments.hpp" |
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42 #include "runtime/deoptimization.hpp" |
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43 #include "runtime/frame.inline.hpp" |
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44 #include "runtime/sharedRuntime.hpp" |
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45 #include "runtime/stubRoutines.hpp" |
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46 #include "runtime/synchronizer.hpp" |
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47 #include "runtime/timer.hpp" |
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48 #include "runtime/vframeArray.hpp" |
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49 #include "utilities/debug.hpp" |
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50 #ifdef COMPILER1 |
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51 #include "c1/c1_Runtime1.hpp" |
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52 #endif |
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53 |
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54 #define __ _masm-> |
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55 |
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56 #ifdef PRODUCT |
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57 #define BLOCK_COMMENT(str) // nothing |
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58 #else |
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59 #define BLOCK_COMMENT(str) __ block_comment(str) |
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60 #endif |
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61 |
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62 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") |
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63 |
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64 int AbstractInterpreter::BasicType_as_index(BasicType type) { |
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65 int i = 0; |
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66 switch (type) { |
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67 case T_BOOLEAN: i = 0; break; |
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68 case T_CHAR : i = 1; break; |
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69 case T_BYTE : i = 2; break; |
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70 case T_SHORT : i = 3; break; |
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71 case T_INT : i = 4; break; |
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72 case T_LONG : i = 5; break; |
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73 case T_VOID : i = 6; break; |
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74 case T_FLOAT : i = 7; break; |
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75 case T_DOUBLE : i = 8; break; |
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76 case T_OBJECT : i = 9; break; |
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77 case T_ARRAY : i = 9; break; |
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78 default : ShouldNotReachHere(); |
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79 } |
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80 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds"); |
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81 return i; |
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82 } |
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83 |
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84 address AbstractInterpreterGenerator::generate_slow_signature_handler() { |
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85 // Slow_signature handler that respects the PPC C calling conventions. |
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86 // |
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87 // We get called by the native entry code with our output register |
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88 // area == 8. First we call InterpreterRuntime::get_result_handler |
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89 // to copy the pointer to the signature string temporarily to the |
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90 // first C-argument and to return the result_handler in |
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91 // R3_RET. Since native_entry will copy the jni-pointer to the |
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92 // first C-argument slot later on, it is OK to occupy this slot |
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93 // temporarilly. Then we copy the argument list on the java |
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94 // expression stack into native varargs format on the native stack |
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95 // and load arguments into argument registers. Integer arguments in |
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96 // the varargs vector will be sign-extended to 8 bytes. |
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97 // |
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98 // On entry: |
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99 // R3_ARG1 - intptr_t* Address of java argument list in memory. |
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100 // R15_prev_state - BytecodeInterpreter* Address of interpreter state for |
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101 // this method |
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102 // R19_method |
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103 // |
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104 // On exit (just before return instruction): |
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105 // R3_RET - contains the address of the result_handler. |
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106 // R4_ARG2 - is not updated for static methods and contains "this" otherwise. |
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107 // R5_ARG3-R10_ARG8: - When the (i-2)th Java argument is not of type float or double, |
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108 // ARGi contains this argument. Otherwise, ARGi is not updated. |
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109 // F1_ARG1-F13_ARG13 - contain the first 13 arguments of type float or double. |
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110 |
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111 const int LogSizeOfTwoInstructions = 3; |
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112 |
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113 // FIXME: use Argument:: GL: Argument names different numbers! |
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114 const int max_fp_register_arguments = 13; |
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115 const int max_int_register_arguments = 6; // first 2 are reserved |
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116 |
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117 const Register arg_java = R21_tmp1; |
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118 const Register arg_c = R22_tmp2; |
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119 const Register signature = R23_tmp3; // is string |
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120 const Register sig_byte = R24_tmp4; |
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121 const Register fpcnt = R25_tmp5; |
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122 const Register argcnt = R26_tmp6; |
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123 const Register intSlot = R27_tmp7; |
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124 const Register target_sp = R28_tmp8; |
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125 const FloatRegister floatSlot = F0; |
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126 |
17803 | 127 address entry = __ function_entry(); |
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128 |
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129 __ save_LR_CR(R0); |
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130 __ save_nonvolatile_gprs(R1_SP, _spill_nonvolatiles_neg(r14)); |
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131 // We use target_sp for storing arguments in the C frame. |
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132 __ mr(target_sp, R1_SP); |
17803 | 133 __ push_frame_reg_args_nonvolatiles(0, R11_scratch1); |
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134 |
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135 __ mr(arg_java, R3_ARG1); |
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136 |
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137 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::get_signature), R16_thread, R19_method); |
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138 |
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139 // Signature is in R3_RET. Signature is callee saved. |
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140 __ mr(signature, R3_RET); |
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141 |
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142 // Reload method, it may have moved. |
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143 #ifdef CC_INTERP |
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144 __ ld(R19_method, state_(_method)); |
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145 #else |
17804 | 146 __ ld(R19_method, 0, target_sp); |
147 __ ld(R19_method, _ijava_state_neg(method), R19_method); | |
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148 #endif |
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149 |
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150 // Get the result handler. |
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151 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::get_result_handler), R16_thread, R19_method); |
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152 |
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153 // Reload method, it may have moved. |
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154 #ifdef CC_INTERP |
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155 __ ld(R19_method, state_(_method)); |
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156 #else |
17804 | 157 __ ld(R19_method, 0, target_sp); |
158 __ ld(R19_method, _ijava_state_neg(method), R19_method); | |
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159 #endif |
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160 |
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161 { |
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162 Label L; |
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163 // test if static |
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164 // _access_flags._flags must be at offset 0. |
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165 // TODO PPC port: requires change in shared code. |
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166 //assert(in_bytes(AccessFlags::flags_offset()) == 0, |
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167 // "MethodOopDesc._access_flags == MethodOopDesc._access_flags._flags"); |
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168 // _access_flags must be a 32 bit value. |
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169 assert(sizeof(AccessFlags) == 4, "wrong size"); |
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170 __ lwa(R11_scratch1/*access_flags*/, method_(access_flags)); |
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171 // testbit with condition register. |
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172 __ testbitdi(CCR0, R0, R11_scratch1/*access_flags*/, JVM_ACC_STATIC_BIT); |
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173 __ btrue(CCR0, L); |
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174 // For non-static functions, pass "this" in R4_ARG2 and copy it |
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175 // to 2nd C-arg slot. |
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176 // We need to box the Java object here, so we use arg_java |
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177 // (address of current Java stack slot) as argument and don't |
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178 // dereference it as in case of ints, floats, etc. |
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179 __ mr(R4_ARG2, arg_java); |
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180 __ addi(arg_java, arg_java, -BytesPerWord); |
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181 __ std(R4_ARG2, _abi(carg_2), target_sp); |
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182 __ bind(L); |
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183 } |
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184 |
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185 // Will be incremented directly after loop_start. argcnt=0 |
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186 // corresponds to 3rd C argument. |
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187 __ li(argcnt, -1); |
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188 // arg_c points to 3rd C argument |
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189 __ addi(arg_c, target_sp, _abi(carg_3)); |
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190 // no floating-point args parsed so far |
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191 __ li(fpcnt, 0); |
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192 |
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193 Label move_intSlot_to_ARG, move_floatSlot_to_FARG; |
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194 Label loop_start, loop_end; |
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195 Label do_int, do_long, do_float, do_double, do_dontreachhere, do_object, do_array, do_boxed; |
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196 |
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197 // signature points to '(' at entry |
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198 #ifdef ASSERT |
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199 __ lbz(sig_byte, 0, signature); |
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200 __ cmplwi(CCR0, sig_byte, '('); |
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201 __ bne(CCR0, do_dontreachhere); |
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202 #endif |
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203 |
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204 __ bind(loop_start); |
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205 |
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206 __ addi(argcnt, argcnt, 1); |
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207 __ lbzu(sig_byte, 1, signature); |
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208 |
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209 __ cmplwi(CCR0, sig_byte, ')'); // end of signature |
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210 __ beq(CCR0, loop_end); |
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211 |
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212 __ cmplwi(CCR0, sig_byte, 'B'); // byte |
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213 __ beq(CCR0, do_int); |
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214 |
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215 __ cmplwi(CCR0, sig_byte, 'C'); // char |
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216 __ beq(CCR0, do_int); |
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217 |
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218 __ cmplwi(CCR0, sig_byte, 'D'); // double |
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219 __ beq(CCR0, do_double); |
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220 |
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221 __ cmplwi(CCR0, sig_byte, 'F'); // float |
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222 __ beq(CCR0, do_float); |
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223 |
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224 __ cmplwi(CCR0, sig_byte, 'I'); // int |
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225 __ beq(CCR0, do_int); |
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226 |
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227 __ cmplwi(CCR0, sig_byte, 'J'); // long |
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228 __ beq(CCR0, do_long); |
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229 |
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230 __ cmplwi(CCR0, sig_byte, 'S'); // short |
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231 __ beq(CCR0, do_int); |
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232 |
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233 __ cmplwi(CCR0, sig_byte, 'Z'); // boolean |
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234 __ beq(CCR0, do_int); |
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235 |
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236 __ cmplwi(CCR0, sig_byte, 'L'); // object |
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237 __ beq(CCR0, do_object); |
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238 |
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239 __ cmplwi(CCR0, sig_byte, '['); // array |
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240 __ beq(CCR0, do_array); |
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241 |
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242 // __ cmplwi(CCR0, sig_byte, 'V'); // void cannot appear since we do not parse the return type |
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243 // __ beq(CCR0, do_void); |
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244 |
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245 __ bind(do_dontreachhere); |
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246 |
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247 __ unimplemented("ShouldNotReachHere in slow_signature_handler", 120); |
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248 |
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249 __ bind(do_array); |
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250 |
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251 { |
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252 Label start_skip, end_skip; |
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253 |
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254 __ bind(start_skip); |
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255 __ lbzu(sig_byte, 1, signature); |
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256 __ cmplwi(CCR0, sig_byte, '['); |
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257 __ beq(CCR0, start_skip); // skip further brackets |
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258 __ cmplwi(CCR0, sig_byte, '9'); |
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259 __ bgt(CCR0, end_skip); // no optional size |
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260 __ cmplwi(CCR0, sig_byte, '0'); |
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261 __ bge(CCR0, start_skip); // skip optional size |
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262 __ bind(end_skip); |
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263 |
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264 __ cmplwi(CCR0, sig_byte, 'L'); |
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265 __ beq(CCR0, do_object); // for arrays of objects, the name of the object must be skipped |
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266 __ b(do_boxed); // otherwise, go directly to do_boxed |
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267 } |
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268 |
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269 __ bind(do_object); |
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270 { |
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271 Label L; |
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272 __ bind(L); |
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273 __ lbzu(sig_byte, 1, signature); |
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274 __ cmplwi(CCR0, sig_byte, ';'); |
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275 __ bne(CCR0, L); |
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276 } |
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277 // Need to box the Java object here, so we use arg_java (address of |
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278 // current Java stack slot) as argument and don't dereference it as |
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279 // in case of ints, floats, etc. |
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280 Label do_null; |
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281 __ bind(do_boxed); |
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parents:
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|
282 __ ld(R0,0, arg_java); |
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|
283 __ cmpdi(CCR0, R0, 0); |
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284 __ li(intSlot,0); |
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parents:
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|
285 __ beq(CCR0, do_null); |
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parents:
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|
286 __ mr(intSlot, arg_java); |
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287 __ bind(do_null); |
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288 __ std(intSlot, 0, arg_c); |
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289 __ addi(arg_java, arg_java, -BytesPerWord); |
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290 __ addi(arg_c, arg_c, BytesPerWord); |
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291 __ cmplwi(CCR0, argcnt, max_int_register_arguments); |
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292 __ blt(CCR0, move_intSlot_to_ARG); |
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293 __ b(loop_start); |
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|
294 |
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parents:
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295 __ bind(do_int); |
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296 __ lwa(intSlot, 0, arg_java); |
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297 __ std(intSlot, 0, arg_c); |
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298 __ addi(arg_java, arg_java, -BytesPerWord); |
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299 __ addi(arg_c, arg_c, BytesPerWord); |
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300 __ cmplwi(CCR0, argcnt, max_int_register_arguments); |
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301 __ blt(CCR0, move_intSlot_to_ARG); |
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302 __ b(loop_start); |
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|
303 |
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304 __ bind(do_long); |
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305 __ ld(intSlot, -BytesPerWord, arg_java); |
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306 __ std(intSlot, 0, arg_c); |
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307 __ addi(arg_java, arg_java, - 2 * BytesPerWord); |
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308 __ addi(arg_c, arg_c, BytesPerWord); |
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309 __ cmplwi(CCR0, argcnt, max_int_register_arguments); |
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310 __ blt(CCR0, move_intSlot_to_ARG); |
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311 __ b(loop_start); |
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|
312 |
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313 __ bind(do_float); |
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314 __ lfs(floatSlot, 0, arg_java); |
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315 #if defined(LINUX) |
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316 __ stfs(floatSlot, 4, arg_c); |
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317 #elif defined(AIX) |
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318 __ stfs(floatSlot, 0, arg_c); |
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|
319 #else |
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320 #error "unknown OS" |
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321 #endif |
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322 __ addi(arg_java, arg_java, -BytesPerWord); |
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323 __ addi(arg_c, arg_c, BytesPerWord); |
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324 __ cmplwi(CCR0, fpcnt, max_fp_register_arguments); |
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325 __ blt(CCR0, move_floatSlot_to_FARG); |
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326 __ b(loop_start); |
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|
327 |
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328 __ bind(do_double); |
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329 __ lfd(floatSlot, - BytesPerWord, arg_java); |
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330 __ stfd(floatSlot, 0, arg_c); |
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331 __ addi(arg_java, arg_java, - 2 * BytesPerWord); |
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332 __ addi(arg_c, arg_c, BytesPerWord); |
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333 __ cmplwi(CCR0, fpcnt, max_fp_register_arguments); |
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334 __ blt(CCR0, move_floatSlot_to_FARG); |
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335 __ b(loop_start); |
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|
336 |
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337 __ bind(loop_end); |
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|
338 |
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339 __ pop_frame(); |
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340 __ restore_nonvolatile_gprs(R1_SP, _spill_nonvolatiles_neg(r14)); |
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341 __ restore_LR_CR(R0); |
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342 |
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343 __ blr(); |
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344 |
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345 Label move_int_arg, move_float_arg; |
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346 __ bind(move_int_arg); // each case must consist of 2 instructions (otherwise adapt LogSizeOfTwoInstructions) |
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347 __ mr(R5_ARG3, intSlot); __ b(loop_start); |
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348 __ mr(R6_ARG4, intSlot); __ b(loop_start); |
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349 __ mr(R7_ARG5, intSlot); __ b(loop_start); |
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350 __ mr(R8_ARG6, intSlot); __ b(loop_start); |
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351 __ mr(R9_ARG7, intSlot); __ b(loop_start); |
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352 __ mr(R10_ARG8, intSlot); __ b(loop_start); |
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|
353 |
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354 __ bind(move_float_arg); // each case must consist of 2 instructions (otherwise adapt LogSizeOfTwoInstructions) |
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355 __ fmr(F1_ARG1, floatSlot); __ b(loop_start); |
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356 __ fmr(F2_ARG2, floatSlot); __ b(loop_start); |
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357 __ fmr(F3_ARG3, floatSlot); __ b(loop_start); |
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358 __ fmr(F4_ARG4, floatSlot); __ b(loop_start); |
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359 __ fmr(F5_ARG5, floatSlot); __ b(loop_start); |
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360 __ fmr(F6_ARG6, floatSlot); __ b(loop_start); |
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361 __ fmr(F7_ARG7, floatSlot); __ b(loop_start); |
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362 __ fmr(F8_ARG8, floatSlot); __ b(loop_start); |
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363 __ fmr(F9_ARG9, floatSlot); __ b(loop_start); |
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364 __ fmr(F10_ARG10, floatSlot); __ b(loop_start); |
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365 __ fmr(F11_ARG11, floatSlot); __ b(loop_start); |
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366 __ fmr(F12_ARG12, floatSlot); __ b(loop_start); |
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367 __ fmr(F13_ARG13, floatSlot); __ b(loop_start); |
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|
368 |
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369 __ bind(move_intSlot_to_ARG); |
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370 __ sldi(R0, argcnt, LogSizeOfTwoInstructions); |
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371 __ load_const(R11_scratch1, move_int_arg); // Label must be bound here. |
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372 __ add(R11_scratch1, R0, R11_scratch1); |
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373 __ mtctr(R11_scratch1/*branch_target*/); |
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374 __ bctr(); |
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375 __ bind(move_floatSlot_to_FARG); |
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376 __ sldi(R0, fpcnt, LogSizeOfTwoInstructions); |
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377 __ addi(fpcnt, fpcnt, 1); |
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378 __ load_const(R11_scratch1, move_float_arg); // Label must be bound here. |
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379 __ add(R11_scratch1, R0, R11_scratch1); |
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380 __ mtctr(R11_scratch1/*branch_target*/); |
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381 __ bctr(); |
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|
382 |
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|
383 return entry; |
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|
384 } |
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|
385 |
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|
386 address AbstractInterpreterGenerator::generate_result_handler_for(BasicType type) { |
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|
387 // |
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|
388 // Registers alive |
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|
389 // R3_RET |
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|
390 // LR |
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|
391 // |
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|
392 // Registers updated |
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|
393 // R3_RET |
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|
394 // |
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|
395 |
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|
396 Label done; |
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397 address entry = __ pc(); |
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|
398 |
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|
399 switch (type) { |
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400 case T_BOOLEAN: |
14445 | 401 // convert !=0 to 1 |
402 __ neg(R0, R3_RET); | |
403 __ orr(R0, R3_RET, R0); | |
404 __ srwi(R3_RET, R0, 31); | |
14408
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405 break; |
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406 case T_BYTE: |
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407 // sign extend 8 bits |
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408 __ extsb(R3_RET, R3_RET); |
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409 break; |
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410 case T_CHAR: |
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411 // zero extend 16 bits |
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412 __ clrldi(R3_RET, R3_RET, 48); |
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413 break; |
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414 case T_SHORT: |
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|
415 // sign extend 16 bits |
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416 __ extsh(R3_RET, R3_RET); |
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417 break; |
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418 case T_INT: |
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419 // sign extend 32 bits |
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420 __ extsw(R3_RET, R3_RET); |
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421 break; |
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422 case T_LONG: |
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423 break; |
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424 case T_OBJECT: |
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425 // unbox result if not null |
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426 __ cmpdi(CCR0, R3_RET, 0); |
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427 __ beq(CCR0, done); |
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428 __ ld(R3_RET, 0, R3_RET); |
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429 __ verify_oop(R3_RET); |
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430 break; |
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431 case T_FLOAT: |
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432 break; |
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433 case T_DOUBLE: |
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434 break; |
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435 case T_VOID: |
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436 break; |
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437 default: ShouldNotReachHere(); |
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438 } |
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|
439 |
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440 __ BIND(done); |
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441 __ blr(); |
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|
442 |
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443 return entry; |
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|
444 } |
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|
445 |
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446 // Abstract method entry. |
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447 // |
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448 address InterpreterGenerator::generate_abstract_entry(void) { |
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449 address entry = __ pc(); |
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|
450 |
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|
451 // |
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452 // Registers alive |
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453 // R16_thread - JavaThread* |
17804 | 454 // R19_method - callee's method (method to be invoked) |
14408
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455 // R1_SP - SP prepared such that caller's outgoing args are near top |
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456 // LR - return address to caller |
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|
457 // |
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458 // Stack layout at this point: |
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|
459 // |
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460 // 0 [TOP_IJAVA_FRAME_ABI] <-- R1_SP |
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461 // alignment (optional) |
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|
462 // [outgoing Java arguments] |
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|
463 // ... |
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|
464 // PARENT [PARENT_IJAVA_FRAME_ABI] |
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465 // ... |
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|
466 // |
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|
467 |
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468 // Can't use call_VM here because we have not set up a new |
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469 // interpreter state. Make the call to the vm and make it look like |
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470 // our caller set up the JavaFrameAnchor. |
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471 __ set_top_ijava_frame_at_SP_as_last_Java_frame(R1_SP, R12_scratch2/*tmp*/); |
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|
472 |
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473 // Push a new C frame and save LR. |
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474 __ save_LR_CR(R0); |
17803 | 475 __ push_frame_reg_args(0, R11_scratch1); |
14408
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|
476 |
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477 // This is not a leaf but we have a JavaFrameAnchor now and we will |
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478 // check (create) exceptions afterward so this is ok. |
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479 __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError)); |
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|
480 |
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|
481 // Pop the C frame and restore LR. |
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|
482 __ pop_frame(); |
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|
483 __ restore_LR_CR(R0); |
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|
484 |
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|
485 // Reset JavaFrameAnchor from call_VM_leaf above. |
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|
486 __ reset_last_Java_frame(); |
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|
487 |
14445 | 488 #ifdef CC_INTERP |
14408
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489 // Return to frame manager, it will handle the pending exception. |
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|
490 __ blr(); |
14445 | 491 #else |
17804 | 492 // We don't know our caller, so jump to the general forward exception stub, |
493 // which will also pop our full frame off. Satisfy the interface of | |
494 // SharedRuntime::generate_forward_exception() | |
495 __ load_const_optimized(R11_scratch1, StubRoutines::forward_exception_entry(), R0); | |
496 __ mtctr(R11_scratch1); | |
497 __ bctr(); | |
14445 | 498 #endif |
14408
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|
499 |
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|
500 return entry; |
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|
501 } |
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|
502 |
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|
503 // Call an accessor method (assuming it is resolved, otherwise drop into |
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parents:
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|
504 // vanilla (slow path) entry. |
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|
505 address InterpreterGenerator::generate_accessor_entry(void) { |
17804 | 506 if (!UseFastAccessorMethods && (!FLAG_IS_ERGO(UseFastAccessorMethods))) { |
14408
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507 return NULL; |
17804 | 508 } |
14408
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|
509 |
14445 | 510 Label Lslow_path, Lacquire; |
14408
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|
511 |
14445 | 512 const Register |
513 Rclass_or_obj = R3_ARG1, | |
14408
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|
514 Rconst_method = R4_ARG2, |
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|
515 Rcodes = Rconst_method, |
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|
516 Rcpool_cache = R5_ARG3, |
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|
517 Rscratch = R11_scratch1, |
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|
518 Rjvmti_mode = Rscratch, |
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|
519 Roffset = R12_scratch2, |
14445 | 520 Rflags = R6_ARG4, |
521 Rbtable = R7_ARG5; | |
522 | |
523 static address branch_table[number_of_states]; | |
14408
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|
524 |
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|
525 address entry = __ pc(); |
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parents:
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|
526 |
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parents:
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|
527 // Check for safepoint: |
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parents:
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|
528 // Ditch this, real man don't need safepoint checks. |
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|
529 |
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parents:
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|
530 // Also check for JVMTI mode |
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|
531 // Check for null obj, take slow path if so. |
14445 | 532 __ ld(Rclass_or_obj, Interpreter::stackElementSize, CC_INTERP_ONLY(R17_tos) NOT_CC_INTERP(R15_esp)); |
14408
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|
533 __ lwz(Rjvmti_mode, thread_(interp_only_mode)); |
14445 | 534 __ cmpdi(CCR1, Rclass_or_obj, 0); |
14408
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|
535 __ cmpwi(CCR0, Rjvmti_mode, 0); |
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|
536 __ crorc(/*CCR0 eq*/2, /*CCR1 eq*/4+2, /*CCR0 eq*/2); |
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|
537 __ beq(CCR0, Lslow_path); // this==null or jvmti_mode!=0 |
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|
538 |
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parents:
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|
539 // Do 2 things in parallel: |
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|
540 // 1. Load the index out of the first instruction word, which looks like this: |
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|
541 // <0x2a><0xb4><index (2 byte, native endianess)>. |
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parents:
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|
542 // 2. Load constant pool cache base. |
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|
543 __ ld(Rconst_method, in_bytes(Method::const_offset()), R19_method); |
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|
544 __ ld(Rcpool_cache, in_bytes(ConstMethod::constants_offset()), Rconst_method); |
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|
545 |
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|
546 __ lhz(Rcodes, in_bytes(ConstMethod::codes_offset()) + 2, Rconst_method); // Lower half of 32 bit field. |
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|
547 __ ld(Rcpool_cache, ConstantPool::cache_offset_in_bytes(), Rcpool_cache); |
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changeset
|
548 |
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parents:
diff
changeset
|
549 // Get the const pool entry by means of <index>. |
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parents:
diff
changeset
|
550 const int codes_shift = exact_log2(in_words(ConstantPoolCacheEntry::size()) * BytesPerWord); |
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|
551 __ slwi(Rscratch, Rcodes, codes_shift); // (codes&0xFFFF)<<codes_shift |
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|
552 __ add(Rcpool_cache, Rscratch, Rcpool_cache); |
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parents:
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|
553 |
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parents:
diff
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|
554 // Check if cpool cache entry is resolved. |
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555 // We are resolved if the indices offset contains the current bytecode. |
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556 ByteSize cp_base_offset = ConstantPoolCache::base_offset(); |
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557 // Big Endian: |
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558 __ lbz(Rscratch, in_bytes(cp_base_offset) + in_bytes(ConstantPoolCacheEntry::indices_offset()) + 7 - 2, Rcpool_cache); |
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559 __ cmpwi(CCR0, Rscratch, Bytecodes::_getfield); |
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560 __ bne(CCR0, Lslow_path); |
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561 __ isync(); // Order succeeding loads wrt. load of _indices field from cpool_cache. |
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562 |
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563 // Finally, start loading the value: Get cp cache entry into regs. |
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564 __ ld(Rflags, in_bytes(cp_base_offset) + in_bytes(ConstantPoolCacheEntry::flags_offset()), Rcpool_cache); |
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565 __ ld(Roffset, in_bytes(cp_base_offset) + in_bytes(ConstantPoolCacheEntry::f2_offset()), Rcpool_cache); |
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566 |
14445 | 567 // Following code is from templateTable::getfield_or_static |
568 // Load pointer to branch table | |
569 __ load_const_optimized(Rbtable, (address)branch_table, Rscratch); | |
570 | |
571 // Get volatile flag | |
572 __ rldicl(Rscratch, Rflags, 64-ConstantPoolCacheEntry::is_volatile_shift, 63); // extract volatile bit | |
573 // note: sync is needed before volatile load on PPC64 | |
574 | |
575 // Check field type | |
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576 __ rldicl(Rflags, Rflags, 64-ConstantPoolCacheEntry::tos_state_shift, 64-ConstantPoolCacheEntry::tos_state_bits); |
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577 |
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578 #ifdef ASSERT |
14445 | 579 Label LFlagInvalid; |
580 __ cmpldi(CCR0, Rflags, number_of_states); | |
581 __ bge(CCR0, LFlagInvalid); | |
582 | |
583 __ ld(R9_ARG7, 0, R1_SP); | |
584 __ ld(R10_ARG8, 0, R21_sender_SP); | |
585 __ cmpd(CCR0, R9_ARG7, R10_ARG8); | |
586 __ asm_assert_eq("backlink", 0x543); | |
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587 #endif // ASSERT |
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588 __ mr(R1_SP, R21_sender_SP); // Cut the stack back to where the caller started. |
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589 |
14445 | 590 // Load from branch table and dispatch (volatile case: one instruction ahead) |
591 __ sldi(Rflags, Rflags, LogBytesPerWord); | |
592 __ cmpwi(CCR6, Rscratch, 1); // volatile? | |
17804 | 593 if (support_IRIW_for_not_multiple_copy_atomic_cpu) { |
594 __ sldi(Rscratch, Rscratch, exact_log2(BytesPerInstWord)); // volatile ? size of 1 instruction : 0 | |
595 } | |
14445 | 596 __ ldx(Rbtable, Rbtable, Rflags); |
597 | |
17804 | 598 if (support_IRIW_for_not_multiple_copy_atomic_cpu) { |
599 __ subf(Rbtable, Rscratch, Rbtable); // point to volatile/non-volatile entry point | |
600 } | |
14445 | 601 __ mtctr(Rbtable); |
602 __ bctr(); | |
603 | |
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604 #ifdef ASSERT |
14445 | 605 __ bind(LFlagInvalid); |
606 __ stop("got invalid flag", 0x6541); | |
607 | |
608 bool all_uninitialized = true, | |
609 all_initialized = true; | |
610 for (int i = 0; i<number_of_states; ++i) { | |
611 all_uninitialized = all_uninitialized && (branch_table[i] == NULL); | |
612 all_initialized = all_initialized && (branch_table[i] != NULL); | |
613 } | |
614 assert(all_uninitialized != all_initialized, "consistency"); // either or | |
615 | |
17804 | 616 __ fence(); // volatile entry point (one instruction before non-volatile_entry point) |
14445 | 617 if (branch_table[vtos] == 0) branch_table[vtos] = __ pc(); // non-volatile_entry point |
618 if (branch_table[dtos] == 0) branch_table[dtos] = __ pc(); // non-volatile_entry point | |
619 if (branch_table[ftos] == 0) branch_table[ftos] = __ pc(); // non-volatile_entry point | |
620 __ stop("unexpected type", 0x6551); | |
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621 #endif |
14445 | 622 |
623 if (branch_table[itos] == 0) { // generate only once | |
624 __ align(32, 28, 28); // align load | |
17804 | 625 __ fence(); // volatile entry point (one instruction before non-volatile_entry point) |
14445 | 626 branch_table[itos] = __ pc(); // non-volatile_entry point |
627 __ lwax(R3_RET, Rclass_or_obj, Roffset); | |
628 __ beq(CCR6, Lacquire); | |
629 __ blr(); | |
630 } | |
631 | |
632 if (branch_table[ltos] == 0) { // generate only once | |
633 __ align(32, 28, 28); // align load | |
17804 | 634 __ fence(); // volatile entry point (one instruction before non-volatile_entry point) |
14445 | 635 branch_table[ltos] = __ pc(); // non-volatile_entry point |
636 __ ldx(R3_RET, Rclass_or_obj, Roffset); | |
637 __ beq(CCR6, Lacquire); | |
638 __ blr(); | |
639 } | |
640 | |
641 if (branch_table[btos] == 0) { // generate only once | |
642 __ align(32, 28, 28); // align load | |
17804 | 643 __ fence(); // volatile entry point (one instruction before non-volatile_entry point) |
14445 | 644 branch_table[btos] = __ pc(); // non-volatile_entry point |
645 __ lbzx(R3_RET, Rclass_or_obj, Roffset); | |
646 __ extsb(R3_RET, R3_RET); | |
647 __ beq(CCR6, Lacquire); | |
648 __ blr(); | |
649 } | |
650 | |
651 if (branch_table[ctos] == 0) { // generate only once | |
652 __ align(32, 28, 28); // align load | |
17804 | 653 __ fence(); // volatile entry point (one instruction before non-volatile_entry point) |
14445 | 654 branch_table[ctos] = __ pc(); // non-volatile_entry point |
655 __ lhzx(R3_RET, Rclass_or_obj, Roffset); | |
656 __ beq(CCR6, Lacquire); | |
657 __ blr(); | |
658 } | |
659 | |
660 if (branch_table[stos] == 0) { // generate only once | |
661 __ align(32, 28, 28); // align load | |
17804 | 662 __ fence(); // volatile entry point (one instruction before non-volatile_entry point) |
14445 | 663 branch_table[stos] = __ pc(); // non-volatile_entry point |
664 __ lhax(R3_RET, Rclass_or_obj, Roffset); | |
665 __ beq(CCR6, Lacquire); | |
666 __ blr(); | |
667 } | |
668 | |
669 if (branch_table[atos] == 0) { // generate only once | |
670 __ align(32, 28, 28); // align load | |
17804 | 671 __ fence(); // volatile entry point (one instruction before non-volatile_entry point) |
14445 | 672 branch_table[atos] = __ pc(); // non-volatile_entry point |
673 __ load_heap_oop(R3_RET, (RegisterOrConstant)Roffset, Rclass_or_obj); | |
674 __ verify_oop(R3_RET); | |
675 //__ dcbt(R3_RET); // prefetch | |
676 __ beq(CCR6, Lacquire); | |
677 __ blr(); | |
678 } | |
679 | |
680 __ align(32, 12); | |
681 __ bind(Lacquire); | |
682 __ twi_0(R3_RET); | |
683 __ isync(); // acquire | |
14408
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684 __ blr(); |
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685 |
14445 | 686 #ifdef ASSERT |
687 for (int i = 0; i<number_of_states; ++i) { | |
688 assert(branch_table[i], "accessor_entry initialization"); | |
689 //tty->print_cr("accessor_entry: branch_table[%d] = 0x%llx (opcode 0x%llx)", i, branch_table[i], *((unsigned int*)branch_table[i])); | |
690 } | |
691 #endif | |
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692 |
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693 __ bind(Lslow_path); |
17804 | 694 __ branch_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals), Rscratch); |
14408
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695 __ flush(); |
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696 |
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697 return entry; |
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698 } |
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699 |
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700 // Interpreter intrinsic for WeakReference.get(). |
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701 // 1. Don't push a full blown frame and go on dispatching, but fetch the value |
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702 // into R8 and return quickly |
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703 // 2. If G1 is active we *must* execute this intrinsic for corrrectness: |
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704 // It contains a GC barrier which puts the reference into the satb buffer |
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705 // to indicate that someone holds a strong reference to the object the |
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706 // weak ref points to! |
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707 address InterpreterGenerator::generate_Reference_get_entry(void) { |
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708 // Code: _aload_0, _getfield, _areturn |
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709 // parameter size = 1 |
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710 // |
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711 // The code that gets generated by this routine is split into 2 parts: |
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712 // 1. the "intrinsified" code for G1 (or any SATB based GC), |
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713 // 2. the slow path - which is an expansion of the regular method entry. |
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714 // |
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715 // Notes: |
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716 // * In the G1 code we do not check whether we need to block for |
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717 // a safepoint. If G1 is enabled then we must execute the specialized |
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718 // code for Reference.get (except when the Reference object is null) |
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719 // so that we can log the value in the referent field with an SATB |
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720 // update buffer. |
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721 // If the code for the getfield template is modified so that the |
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722 // G1 pre-barrier code is executed when the current method is |
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723 // Reference.get() then going through the normal method entry |
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724 // will be fine. |
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725 // * The G1 code can, however, check the receiver object (the instance |
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726 // of java.lang.Reference) and jump to the slow path if null. If the |
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727 // Reference object is null then we obviously cannot fetch the referent |
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728 // and so we don't need to call the G1 pre-barrier. Thus we can use the |
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729 // regular method entry code to generate the NPE. |
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730 // |
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731 // This code is based on generate_accessor_enty. |
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|
732 |
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733 address entry = __ pc(); |
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|
734 |
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735 const int referent_offset = java_lang_ref_Reference::referent_offset; |
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736 guarantee(referent_offset > 0, "referent offset not initialized"); |
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|
737 |
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738 if (UseG1GC) { |
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739 Label slow_path; |
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|
740 |
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741 // Debugging not possible, so can't use __ skip_if_jvmti_mode(slow_path, GR31_SCRATCH); |
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742 |
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743 // In the G1 code we don't check if we need to reach a safepoint. We |
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744 // continue and the thread will safepoint at the next bytecode dispatch. |
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|
745 |
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746 // If the receiver is null then it is OK to jump to the slow path. |
14445 | 747 __ ld(R3_RET, Interpreter::stackElementSize, CC_INTERP_ONLY(R17_tos) NOT_CC_INTERP(R15_esp)); // get receiver |
14408
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748 |
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749 // Check if receiver == NULL and go the slow path. |
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750 __ cmpdi(CCR0, R3_RET, 0); |
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751 __ beq(CCR0, slow_path); |
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|
752 |
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753 // Load the value of the referent field. |
14445 | 754 __ load_heap_oop(R3_RET, referent_offset, R3_RET); |
14408
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755 |
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756 // Generate the G1 pre-barrier code to log the value of |
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757 // the referent field in an SATB buffer. Note with |
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758 // these parameters the pre-barrier does not generate |
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759 // the load of the previous value. |
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|
760 |
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761 // Restore caller sp for c2i case. |
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762 #ifdef ASSERT |
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763 __ ld(R9_ARG7, 0, R1_SP); |
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764 __ ld(R10_ARG8, 0, R21_sender_SP); |
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765 __ cmpd(CCR0, R9_ARG7, R10_ARG8); |
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766 __ asm_assert_eq("backlink", 0x544); |
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767 #endif // ASSERT |
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768 __ mr(R1_SP, R21_sender_SP); // Cut the stack back to where the caller started. |
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769 |
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770 __ g1_write_barrier_pre(noreg, // obj |
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771 noreg, // offset |
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772 R3_RET, // pre_val |
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773 R11_scratch1, // tmp |
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774 R12_scratch2, // tmp |
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775 true); // needs_frame |
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776 |
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777 __ blr(); |
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778 |
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779 // Generate regular method entry. |
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780 __ bind(slow_path); |
17804 | 781 __ branch_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals), R11_scratch1); |
14408
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782 __ flush(); |
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783 |
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784 return entry; |
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785 } else { |
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786 return generate_accessor_entry(); |
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787 } |
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788 } |
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789 |
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790 void Deoptimization::unwind_callee_save_values(frame* f, vframeArray* vframe_array) { |
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791 // This code is sort of the equivalent of C2IAdapter::setup_stack_frame back in |
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792 // the days we had adapter frames. When we deoptimize a situation where a |
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793 // compiled caller calls a compiled caller will have registers it expects |
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794 // to survive the call to the callee. If we deoptimize the callee the only |
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795 // way we can restore these registers is to have the oldest interpreter |
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796 // frame that we create restore these values. That is what this routine |
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797 // will accomplish. |
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798 |
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799 // At the moment we have modified c2 to not have any callee save registers |
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800 // so this problem does not exist and this routine is just a place holder. |
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801 |
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802 assert(f->is_interpreted_frame(), "must be interpreted"); |
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803 } |