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annotate src/cpu/ppc/vm/vm_version_ppc.cpp @ 14408:ec28f9c041ff

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8019972: PPC64 (part 9): platform files for interpreter only VM. Summary: With this change the HotSpot core build works on Linux/PPC64. The VM succesfully executes simple test programs. Reviewed-by: kvn
author goetz
date Fri, 02 Aug 2013 16:46:45 +0200
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children 41b780b43b74
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14408
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1 /*
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
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3 * Copyright 2012, 2013 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 "assembler_ppc.inline.hpp"
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28 #include "compiler/disassembler.hpp"
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29 #include "memory/resourceArea.hpp"
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30 #include "runtime/java.hpp"
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31 #include "runtime/stubCodeGenerator.hpp"
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32 #include "utilities/defaultStream.hpp"
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33 #include "vm_version_ppc.hpp"
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34 #ifdef TARGET_OS_FAMILY_aix
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35 # include "os_aix.inline.hpp"
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36 #endif
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37 #ifdef TARGET_OS_FAMILY_linux
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38 # include "os_linux.inline.hpp"
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39 #endif
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40
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41 # include <sys/sysinfo.h>
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42
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43 int VM_Version::_features = VM_Version::unknown_m;
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44 int VM_Version::_measured_cache_line_size = 128; // default value
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45 const char* VM_Version::_features_str = "";
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46 bool VM_Version::_is_determine_features_test_running = false;
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47
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48
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49 #define MSG(flag) \
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50 if (flag && !FLAG_IS_DEFAULT(flag)) \
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51 jio_fprintf(defaultStream::error_stream(), \
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52 "warning: -XX:+" #flag " requires -XX:+UseSIGTRAP\n" \
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53 " -XX:+" #flag " will be disabled!\n");
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54
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55 void VM_Version::initialize() {
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56
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57 // Test which instructions are supported and measure cache line size.
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58 determine_features();
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59
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60 // If PowerArchitecturePPC64 hasn't been specified explicitly determine from features.
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61 if (FLAG_IS_DEFAULT(PowerArchitecturePPC64)) {
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62 if (VM_Version::has_popcntw()) {
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63 FLAG_SET_ERGO(uintx, PowerArchitecturePPC64, 7);
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64 } else if (VM_Version::has_cmpb()) {
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65 FLAG_SET_ERGO(uintx, PowerArchitecturePPC64, 6);
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66 } else if (VM_Version::has_popcntb()) {
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67 FLAG_SET_ERGO(uintx, PowerArchitecturePPC64, 5);
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68 } else {
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69 FLAG_SET_ERGO(uintx, PowerArchitecturePPC64, 0);
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70 }
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71 }
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72 guarantee(PowerArchitecturePPC64 == 0 || PowerArchitecturePPC64 == 5 ||
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73 PowerArchitecturePPC64 == 6 || PowerArchitecturePPC64 == 7,
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74 "PowerArchitecturePPC64 should be 0, 5, 6 or 7");
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75
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76 if (!UseSIGTRAP) {
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77 MSG(TrapBasedICMissChecks);
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78 MSG(TrapBasedNotEntrantChecks);
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79 MSG(TrapBasedNullChecks);
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80 MSG(TrapBasedRangeChecks);
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81 FLAG_SET_ERGO(bool, TrapBasedNotEntrantChecks, false);
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82 FLAG_SET_ERGO(bool, TrapBasedNullChecks, false);
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83 FLAG_SET_ERGO(bool, TrapBasedICMissChecks, false);
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84 FLAG_SET_ERGO(bool, TrapBasedRangeChecks, false);
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85 }
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86
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87 #ifdef COMPILER2
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88 // On Power6 test for section size.
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89 if (PowerArchitecturePPC64 == 6)
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90 determine_section_size();
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91 // TODO: PPC port else
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92 // TODO: PPC port PdScheduling::power6SectorSize = 0x20;
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93
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94 MaxVectorSize = 8;
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95 #endif
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96
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97 // Create and print feature-string.
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98 char buf[(num_features+1) * 16]; // max 16 chars per feature
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99 jio_snprintf(buf, sizeof(buf),
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100 "ppc64%s%s%s%s%s%s%s%s",
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101 (has_fsqrt() ? " fsqrt" : ""),
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102 (has_isel() ? " isel" : ""),
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103 (has_lxarxeh() ? " lxarxeh" : ""),
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104 (has_cmpb() ? " cmpb" : ""),
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105 //(has_mftgpr()? " mftgpr" : ""),
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106 (has_popcntb() ? " popcntb" : ""),
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107 (has_popcntw() ? " popcntw" : ""),
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108 (has_fcfids() ? " fcfids" : ""),
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109 (has_vand() ? " vand" : "")
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110 // Make sure number of %s matches num_features!
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111 );
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112 _features_str = strdup(buf);
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113 NOT_PRODUCT(if (Verbose) print_features(););
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114
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115 // PPC64 supports 8-byte compare-exchange operations (see
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116 // Atomic::cmpxchg and StubGenerator::generate_atomic_cmpxchg_ptr)
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117 // and 'atomic long memory ops' (see Unsafe_GetLongVolatile).
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118 _supports_cx8 = true;
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119
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120 UseSSE = 0; // Only on x86 and x64
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121
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122 intx cache_line_size = _measured_cache_line_size;
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123
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124 if (FLAG_IS_DEFAULT(AllocatePrefetchStyle)) AllocatePrefetchStyle = 1;
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125
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126 if (AllocatePrefetchStyle == 4) {
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127 AllocatePrefetchStepSize = cache_line_size; // need exact value
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128 if (FLAG_IS_DEFAULT(AllocatePrefetchLines)) AllocatePrefetchLines = 12; // use larger blocks by default
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129 if (AllocatePrefetchDistance < 0) AllocatePrefetchDistance = 2*cache_line_size; // default is not defined ?
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130 } else {
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131 if (cache_line_size > AllocatePrefetchStepSize) AllocatePrefetchStepSize = cache_line_size;
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132 if (FLAG_IS_DEFAULT(AllocatePrefetchLines)) AllocatePrefetchLines = 3; // Optimistic value
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133 if (AllocatePrefetchDistance < 0) AllocatePrefetchDistance = 3*cache_line_size; // default is not defined ?
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134 }
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135
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136 assert(AllocatePrefetchLines > 0, "invalid value");
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137 if (AllocatePrefetchLines < 1) // Set valid value in product VM.
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138 AllocatePrefetchLines = 1; // Conservative value
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139
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140 if (AllocatePrefetchStyle == 3 && AllocatePrefetchDistance < cache_line_size)
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141 AllocatePrefetchStyle = 1; // fall back if inappropriate
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142
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143 assert(AllocatePrefetchStyle >= 0, "AllocatePrefetchStyle should be positive");
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144 }
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145
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146 void VM_Version::print_features() {
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147 tty->print_cr("Version: %s cache_line_size = %d", cpu_features(), get_cache_line_size());
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148 }
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149
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150 #ifdef COMPILER2
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151 // Determine section size on power6: If section size is 8 instructions,
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152 // there should be a difference between the two testloops of ~15 %. If
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153 // no difference is detected the section is assumed to be 32 instructions.
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154 void VM_Version::determine_section_size() {
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155
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156 int unroll = 80;
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157
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158 const int code_size = (2* unroll * 32 + 100)*BytesPerInstWord;
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159
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160 // Allocate space for the code
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161 ResourceMark rm;
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162 CodeBuffer cb("detect_section_size", code_size, 0);
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163 MacroAssembler* a = new MacroAssembler(&cb);
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164
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165 uint32_t *code = (uint32_t *)a->pc();
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166 // emit code.
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167 void (*test1)() = (void(*)())(void *)a->emit_fd();
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168
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169 Label l1;
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170
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171 a->li(R4, 1);
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172 a->sldi(R4, R4, 28);
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173 a->b(l1);
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174 a->align(CodeEntryAlignment);
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175
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176 a->bind(l1);
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177
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178 for (int i = 0; i < unroll; i++) {
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179 // Schleife 1
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180 // ------- sector 0 ------------
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181 // ;; 0
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182 a->nop(); // 1
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183 a->fpnop0(); // 2
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184 a->fpnop1(); // 3
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185 a->addi(R4,R4, -1); // 4
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186
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187 // ;; 1
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188 a->nop(); // 5
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189 a->fmr(F6, F6); // 6
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190 a->fmr(F7, F7); // 7
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191 a->endgroup(); // 8
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192 // ------- sector 8 ------------
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193
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194 // ;; 2
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195 a->nop(); // 9
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196 a->nop(); // 10
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197 a->fmr(F8, F8); // 11
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198 a->fmr(F9, F9); // 12
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199
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200 // ;; 3
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201 a->nop(); // 13
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202 a->fmr(F10, F10); // 14
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203 a->fmr(F11, F11); // 15
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204 a->endgroup(); // 16
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205 // -------- sector 16 -------------
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206
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207 // ;; 4
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208 a->nop(); // 17
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209 a->nop(); // 18
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210 a->fmr(F15, F15); // 19
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211 a->fmr(F16, F16); // 20
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212
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213 // ;; 5
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214 a->nop(); // 21
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215 a->fmr(F17, F17); // 22
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216 a->fmr(F18, F18); // 23
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217 a->endgroup(); // 24
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218 // ------- sector 24 ------------
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219
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220 // ;; 6
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221 a->nop(); // 25
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222 a->nop(); // 26
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223 a->fmr(F19, F19); // 27
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224 a->fmr(F20, F20); // 28
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225
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226 // ;; 7
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227 a->nop(); // 29
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228 a->fmr(F21, F21); // 30
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229 a->fmr(F22, F22); // 31
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230 a->brnop0(); // 32
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231
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232 // ------- sector 32 ------------
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233 }
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234
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235 // ;; 8
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236 a->cmpdi(CCR0, R4, unroll);// 33
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237 a->bge(CCR0, l1); // 34
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238 a->blr();
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239
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240 // emit code.
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241 void (*test2)() = (void(*)())(void *)a->emit_fd();
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242 // uint32_t *code = (uint32_t *)a->pc();
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243
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244 Label l2;
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245
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246 a->li(R4, 1);
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247 a->sldi(R4, R4, 28);
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248 a->b(l2);
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249 a->align(CodeEntryAlignment);
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250
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251 a->bind(l2);
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252
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253 for (int i = 0; i < unroll; i++) {
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254 // Schleife 2
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255 // ------- sector 0 ------------
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256 // ;; 0
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257 a->brnop0(); // 1
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258 a->nop(); // 2
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259 //a->cmpdi(CCR0, R4, unroll);
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260 a->fpnop0(); // 3
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261 a->fpnop1(); // 4
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262 a->addi(R4,R4, -1); // 5
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263
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264 // ;; 1
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265
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266 a->nop(); // 6
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267 a->fmr(F6, F6); // 7
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268 a->fmr(F7, F7); // 8
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269 // ------- sector 8 ---------------
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270
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271 // ;; 2
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272 a->endgroup(); // 9
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273
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274 // ;; 3
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275 a->nop(); // 10
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276 a->nop(); // 11
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277 a->fmr(F8, F8); // 12
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278
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279 // ;; 4
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280 a->fmr(F9, F9); // 13
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281 a->nop(); // 14
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282 a->fmr(F10, F10); // 15
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283
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284 // ;; 5
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285 a->fmr(F11, F11); // 16
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286 // -------- sector 16 -------------
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287
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288 // ;; 6
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289 a->endgroup(); // 17
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290
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291 // ;; 7
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292 a->nop(); // 18
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293 a->nop(); // 19
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294 a->fmr(F15, F15); // 20
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295
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296 // ;; 8
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297 a->fmr(F16, F16); // 21
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298 a->nop(); // 22
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299 a->fmr(F17, F17); // 23
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300
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301 // ;; 9
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302 a->fmr(F18, F18); // 24
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303 // -------- sector 24 -------------
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304
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305 // ;; 10
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306 a->endgroup(); // 25
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307
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308 // ;; 11
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309 a->nop(); // 26
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310 a->nop(); // 27
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311 a->fmr(F19, F19); // 28
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312
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313 // ;; 12
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314 a->fmr(F20, F20); // 29
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315 a->nop(); // 30
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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316 a->fmr(F21, F21); // 31
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317
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parents:
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318 // ;; 13
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319 a->fmr(F22, F22); // 32
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320 }
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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321
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322 // -------- sector 32 -------------
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323 // ;; 14
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324 a->cmpdi(CCR0, R4, unroll); // 33
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325 a->bge(CCR0, l2); // 34
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diff changeset
326
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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327 a->blr();
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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328 uint32_t *code_end = (uint32_t *)a->pc();
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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329 a->flush();
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
330
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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diff changeset
331 double loop1_seconds,loop2_seconds, rel_diff;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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diff changeset
332 uint64_t start1, stop1;
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diff changeset
333
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334 start1 = os::current_thread_cpu_time(false);
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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335 (*test1)();
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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336 stop1 = os::current_thread_cpu_time(false);
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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337 loop1_seconds = (stop1- start1) / (1000 *1000 *1000.0);
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
338
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
339
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340 start1 = os::current_thread_cpu_time(false);
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341 (*test2)();
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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342 stop1 = os::current_thread_cpu_time(false);
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parents:
diff changeset
343
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344 loop2_seconds = (stop1 - start1) / (1000 *1000 *1000.0);
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345
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346 rel_diff = (loop2_seconds - loop1_seconds) / loop1_seconds *100;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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diff changeset
347
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348 if (PrintAssembly) {
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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diff changeset
349 ttyLocker ttyl;
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350 tty->print_cr("Decoding section size detection stub at " INTPTR_FORMAT " before execution:", code);
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351 Disassembler::decode((u_char*)code, (u_char*)code_end, tty);
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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352 tty->print_cr("Time loop1 :%f", loop1_seconds);
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
353 tty->print_cr("Time loop2 :%f", loop2_seconds);
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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diff changeset
354 tty->print_cr("(time2 - time1) / time1 = %f %%", rel_diff);
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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diff changeset
355
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
356 if (rel_diff > 12.0) {
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
357 tty->print_cr("Section Size 8 Instructions");
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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358 } else{
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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359 tty->print_cr("Section Size 32 Instructions or Power5");
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
360 }
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
361 }
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
362
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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363 #if 0 // TODO: PPC port
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
364 // Set sector size (if not set explicitly).
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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365 if (FLAG_IS_DEFAULT(Power6SectorSize128PPC64)) {
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
366 if (rel_diff > 12.0) {
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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367 PdScheduling::power6SectorSize = 0x20;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
368 } else {
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
369 PdScheduling::power6SectorSize = 0x80;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
370 }
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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371 } else if (Power6SectorSize128PPC64) {
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
372 PdScheduling::power6SectorSize = 0x80;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
373 } else {
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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374 PdScheduling::power6SectorSize = 0x20;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
375 }
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
376 #endif
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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377 if (UsePower6SchedulerPPC64) Unimplemented();
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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378 }
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
379 #endif // COMPILER2
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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380
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
381 void VM_Version::determine_features() {
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
382 const int code_size = (num_features+1+2*7)*BytesPerInstWord; // 7 InstWords for each call (function descriptor + blr instruction)
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
383 int features = 0;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
384
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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385 // create test area
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
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386 enum { BUFFER_SIZE = 2*4*K }; // needs to be >=2* max cache line size (cache line size can't exceed min page size)
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
387 char test_area[BUFFER_SIZE];
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
388 char *mid_of_test_area = &test_area[BUFFER_SIZE>>1];
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
389
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
390 // Allocate space for the code
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
391 ResourceMark rm;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
392 CodeBuffer cb("detect_cpu_features", code_size, 0);
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
393 MacroAssembler* a = new MacroAssembler(&cb);
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
394
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
395 // emit code.
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
396 void (*test)(address addr, uint64_t offset)=(void(*)(address addr, uint64_t offset))(void *)a->emit_fd();
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
397 uint32_t *code = (uint32_t *)a->pc();
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
398 // Don't use R0 in ldarx.
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
399 // keep R3_ARG1 = R3 unmodified, it contains &field (see below)
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
400 // keep R4_ARG2 = R4 unmodified, it contains offset = 0 (see below)
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
401 a->fsqrt(F3, F4); // code[0] -> fsqrt_m
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
402 a->isel(R7, R5, R6, 0); // code[1] -> isel_m
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
403 a->ldarx_unchecked(R7, R3_ARG1, R4_ARG2, 1);// code[2] -> lxarx_m
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
404 a->cmpb(R7, R5, R6); // code[3] -> bcmp
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
405 //a->mftgpr(R7, F3); // code[4] -> mftgpr
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
406 a->popcntb(R7, R5); // code[5] -> popcntb
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
407 a->popcntw(R7, R5); // code[6] -> popcntw
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
408 a->fcfids(F3, F4); // code[7] -> fcfids
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
409 a->vand(VR0, VR0, VR0); // code[8] -> vand
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
410 a->blr();
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
411
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
412 // Emit function to set one cache line to zero
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
413 void (*zero_cacheline_func_ptr)(char*) = (void(*)(char*))(void *)a->emit_fd(); // emit function descriptor and get pointer to it
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
414 a->dcbz(R3_ARG1); // R3_ARG1 = R3 = addr
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
415 a->blr();
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
416
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
417 uint32_t *code_end = (uint32_t *)a->pc();
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
418 a->flush();
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
419
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
420 // Print the detection code.
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
421 if (PrintAssembly) {
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
422 ttyLocker ttyl;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
423 tty->print_cr("Decoding cpu-feature detection stub at " INTPTR_FORMAT " before execution:", code);
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
424 Disassembler::decode((u_char*)code, (u_char*)code_end, tty);
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
425 }
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
426
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
427 // Measure cache line size.
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
428 memset(test_area, 0xFF, BUFFER_SIZE); // fill test area with 0xFF
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
429 (*zero_cacheline_func_ptr)(mid_of_test_area); // call function which executes dcbz to the middle
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
430 int count = 0; // count zeroed bytes
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
431 for (int i = 0; i < BUFFER_SIZE; i++) if (test_area[i] == 0) count++;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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parents:
diff changeset
432 guarantee(is_power_of_2(count), "cache line size needs to be a power of 2");
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
433 _measured_cache_line_size = count;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
434
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
435 // Execute code. Illegal instructions will be replaced by 0 in the signal handler.
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
436 VM_Version::_is_determine_features_test_running = true;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
437 (*test)((address)mid_of_test_area, (uint64_t)0);
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
438 VM_Version::_is_determine_features_test_running = false;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
439
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
440 // determine which instructions are legal.
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
441 int feature_cntr = 0;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
442 if (code[feature_cntr++]) features |= fsqrt_m;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
443 if (code[feature_cntr++]) features |= isel_m;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
444 if (code[feature_cntr++]) features |= lxarxeh_m;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
445 if (code[feature_cntr++]) features |= cmpb_m;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
446 //if(code[feature_cntr++])features |= mftgpr_m;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
447 if (code[feature_cntr++]) features |= popcntb_m;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
448 if (code[feature_cntr++]) features |= popcntw_m;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
449 if (code[feature_cntr++]) features |= fcfids_m;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
450 if (code[feature_cntr++]) features |= vand_m;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
451
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
452 // Print the detection code.
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
453 if (PrintAssembly) {
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
454 ttyLocker ttyl;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
455 tty->print_cr("Decoding cpu-feature detection stub at " INTPTR_FORMAT " after execution:", code);
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
456 Disassembler::decode((u_char*)code, (u_char*)code_end, tty);
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
457 }
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
458
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
459 _features = features;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
460 }
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
461
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
goetz
parents:
diff changeset
462
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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463 static int saved_features = 0;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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464
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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465 void VM_Version::allow_all() {
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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466 saved_features = _features;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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467 _features = all_features_m;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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468 }
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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469
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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470 void VM_Version::revert() {
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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471 _features = saved_features;
ec28f9c041ff 8019972: PPC64 (part 9): platform files for interpreter only VM.
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472 }