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0
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1 /*
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2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 #include "incls/_precompiled.incl"
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26 #include "incls/_assembler_x86_32.cpp.incl"
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27
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28 // Implementation of AddressLiteral
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29
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30 AddressLiteral::AddressLiteral(address target, relocInfo::relocType rtype) {
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31 _is_lval = false;
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32 _target = target;
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33 switch (rtype) {
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34 case relocInfo::oop_type:
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35 // Oops are a special case. Normally they would be their own section
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36 // but in cases like icBuffer they are literals in the code stream that
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37 // we don't have a section for. We use none so that we get a literal address
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38 // which is always patchable.
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39 break;
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40 case relocInfo::external_word_type:
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41 _rspec = external_word_Relocation::spec(target);
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42 break;
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43 case relocInfo::internal_word_type:
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44 _rspec = internal_word_Relocation::spec(target);
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45 break;
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46 case relocInfo::opt_virtual_call_type:
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47 _rspec = opt_virtual_call_Relocation::spec();
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48 break;
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49 case relocInfo::static_call_type:
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50 _rspec = static_call_Relocation::spec();
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51 break;
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52 case relocInfo::runtime_call_type:
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53 _rspec = runtime_call_Relocation::spec();
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54 break;
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55 case relocInfo::poll_type:
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56 case relocInfo::poll_return_type:
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57 _rspec = Relocation::spec_simple(rtype);
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58 break;
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59 case relocInfo::none:
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60 break;
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61 default:
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62 ShouldNotReachHere();
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63 break;
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64 }
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65 }
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66
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67 // Implementation of Address
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68
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69 Address Address::make_array(ArrayAddress adr) {
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70 #ifdef _LP64
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71 // Not implementable on 64bit machines
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72 // Should have been handled higher up the call chain.
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73 ShouldNotReachHere();
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74 #else
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75 AddressLiteral base = adr.base();
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76 Address index = adr.index();
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77 assert(index._disp == 0, "must not have disp"); // maybe it can?
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78 Address array(index._base, index._index, index._scale, (intptr_t) base.target());
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79 array._rspec = base._rspec;
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80 return array;
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81 #endif // _LP64
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82 }
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83
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84 #ifndef _LP64
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85
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86 // exceedingly dangerous constructor
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87 Address::Address(address loc, RelocationHolder spec) {
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88 _base = noreg;
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89 _index = noreg;
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90 _scale = no_scale;
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91 _disp = (intptr_t) loc;
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92 _rspec = spec;
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93 }
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94 #endif // _LP64
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95
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96 // Convert the raw encoding form into the form expected by the constructor for
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97 // Address. An index of 4 (rsp) corresponds to having no index, so convert
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98 // that to noreg for the Address constructor.
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99 Address Address::make_raw(int base, int index, int scale, int disp) {
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100 bool valid_index = index != rsp->encoding();
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101 if (valid_index) {
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102 Address madr(as_Register(base), as_Register(index), (Address::ScaleFactor)scale, in_ByteSize(disp));
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103 return madr;
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104 } else {
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105 Address madr(as_Register(base), noreg, Address::no_scale, in_ByteSize(disp));
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106 return madr;
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107 }
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108 }
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109
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110 // Implementation of Assembler
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111
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112 int AbstractAssembler::code_fill_byte() {
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113 return (u_char)'\xF4'; // hlt
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114 }
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115
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116 // make this go away someday
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117 void Assembler::emit_data(jint data, relocInfo::relocType rtype, int format) {
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118 if (rtype == relocInfo::none)
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119 emit_long(data);
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120 else emit_data(data, Relocation::spec_simple(rtype), format);
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121 }
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122
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123
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124 void Assembler::emit_data(jint data, RelocationHolder const& rspec, int format) {
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125 assert(imm32_operand == 0, "default format must be imm32 in this file");
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126 assert(inst_mark() != NULL, "must be inside InstructionMark");
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127 if (rspec.type() != relocInfo::none) {
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128 #ifdef ASSERT
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129 check_relocation(rspec, format);
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130 #endif
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131 // Do not use AbstractAssembler::relocate, which is not intended for
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132 // embedded words. Instead, relocate to the enclosing instruction.
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133
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134 // hack. call32 is too wide for mask so use disp32
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135 if (format == call32_operand)
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136 code_section()->relocate(inst_mark(), rspec, disp32_operand);
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137 else
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138 code_section()->relocate(inst_mark(), rspec, format);
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139 }
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140 emit_long(data);
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141 }
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142
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143
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144 void Assembler::emit_arith_b(int op1, int op2, Register dst, int imm8) {
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145 assert(dst->has_byte_register(), "must have byte register");
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146 assert(isByte(op1) && isByte(op2), "wrong opcode");
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147 assert(isByte(imm8), "not a byte");
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148 assert((op1 & 0x01) == 0, "should be 8bit operation");
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149 emit_byte(op1);
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150 emit_byte(op2 | dst->encoding());
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151 emit_byte(imm8);
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152 }
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153
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154
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155 void Assembler::emit_arith(int op1, int op2, Register dst, int imm32) {
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156 assert(isByte(op1) && isByte(op2), "wrong opcode");
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157 assert((op1 & 0x01) == 1, "should be 32bit operation");
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158 assert((op1 & 0x02) == 0, "sign-extension bit should not be set");
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159 if (is8bit(imm32)) {
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160 emit_byte(op1 | 0x02); // set sign bit
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161 emit_byte(op2 | dst->encoding());
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162 emit_byte(imm32 & 0xFF);
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163 } else {
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164 emit_byte(op1);
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165 emit_byte(op2 | dst->encoding());
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166 emit_long(imm32);
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167 }
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168 }
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169
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170 // immediate-to-memory forms
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171 void Assembler::emit_arith_operand(int op1, Register rm, Address adr, int imm32) {
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172 assert((op1 & 0x01) == 1, "should be 32bit operation");
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173 assert((op1 & 0x02) == 0, "sign-extension bit should not be set");
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174 if (is8bit(imm32)) {
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175 emit_byte(op1 | 0x02); // set sign bit
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176 emit_operand(rm,adr);
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177 emit_byte(imm32 & 0xFF);
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178 } else {
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179 emit_byte(op1);
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180 emit_operand(rm,adr);
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181 emit_long(imm32);
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182 }
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183 }
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184
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185 void Assembler::emit_arith(int op1, int op2, Register dst, jobject obj) {
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186 assert(isByte(op1) && isByte(op2), "wrong opcode");
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187 assert((op1 & 0x01) == 1, "should be 32bit operation");
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188 assert((op1 & 0x02) == 0, "sign-extension bit should not be set");
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189 InstructionMark im(this);
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190 emit_byte(op1);
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191 emit_byte(op2 | dst->encoding());
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192 emit_data((int)obj, relocInfo::oop_type, 0);
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193 }
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194
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195
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196 void Assembler::emit_arith(int op1, int op2, Register dst, Register src) {
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197 assert(isByte(op1) && isByte(op2), "wrong opcode");
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198 emit_byte(op1);
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199 emit_byte(op2 | dst->encoding() << 3 | src->encoding());
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200 }
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201
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202
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203 void Assembler::emit_operand(Register reg,
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204 Register base,
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205 Register index,
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206 Address::ScaleFactor scale,
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207 int disp,
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208 RelocationHolder const& rspec) {
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209
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210 relocInfo::relocType rtype = (relocInfo::relocType) rspec.type();
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211 if (base->is_valid()) {
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212 if (index->is_valid()) {
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213 assert(scale != Address::no_scale, "inconsistent address");
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214 // [base + index*scale + disp]
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215 if (disp == 0 && rtype == relocInfo::none && base != rbp) {
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216 // [base + index*scale]
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217 // [00 reg 100][ss index base]
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218 assert(index != rsp, "illegal addressing mode");
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219 emit_byte(0x04 | reg->encoding() << 3);
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220 emit_byte(scale << 6 | index->encoding() << 3 | base->encoding());
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221 } else if (is8bit(disp) && rtype == relocInfo::none) {
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222 // [base + index*scale + imm8]
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223 // [01 reg 100][ss index base] imm8
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224 assert(index != rsp, "illegal addressing mode");
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225 emit_byte(0x44 | reg->encoding() << 3);
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226 emit_byte(scale << 6 | index->encoding() << 3 | base->encoding());
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227 emit_byte(disp & 0xFF);
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228 } else {
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229 // [base + index*scale + imm32]
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230 // [10 reg 100][ss index base] imm32
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231 assert(index != rsp, "illegal addressing mode");
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232 emit_byte(0x84 | reg->encoding() << 3);
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233 emit_byte(scale << 6 | index->encoding() << 3 | base->encoding());
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234 emit_data(disp, rspec, disp32_operand);
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235 }
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236 } else if (base == rsp) {
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237 // [esp + disp]
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238 if (disp == 0 && rtype == relocInfo::none) {
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239 // [esp]
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240 // [00 reg 100][00 100 100]
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241 emit_byte(0x04 | reg->encoding() << 3);
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242 emit_byte(0x24);
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243 } else if (is8bit(disp) && rtype == relocInfo::none) {
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244 // [esp + imm8]
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245 // [01 reg 100][00 100 100] imm8
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246 emit_byte(0x44 | reg->encoding() << 3);
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247 emit_byte(0x24);
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248 emit_byte(disp & 0xFF);
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249 } else {
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250 // [esp + imm32]
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251 // [10 reg 100][00 100 100] imm32
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252 emit_byte(0x84 | reg->encoding() << 3);
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253 emit_byte(0x24);
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254 emit_data(disp, rspec, disp32_operand);
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255 }
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256 } else {
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257 // [base + disp]
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258 assert(base != rsp, "illegal addressing mode");
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259 if (disp == 0 && rtype == relocInfo::none && base != rbp) {
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260 // [base]
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261 // [00 reg base]
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262 assert(base != rbp, "illegal addressing mode");
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263 emit_byte(0x00 | reg->encoding() << 3 | base->encoding());
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264 } else if (is8bit(disp) && rtype == relocInfo::none) {
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265 // [base + imm8]
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266 // [01 reg base] imm8
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267 emit_byte(0x40 | reg->encoding() << 3 | base->encoding());
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268 emit_byte(disp & 0xFF);
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269 } else {
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270 // [base + imm32]
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271 // [10 reg base] imm32
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272 emit_byte(0x80 | reg->encoding() << 3 | base->encoding());
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273 emit_data(disp, rspec, disp32_operand);
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274 }
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275 }
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276 } else {
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277 if (index->is_valid()) {
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278 assert(scale != Address::no_scale, "inconsistent address");
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279 // [index*scale + disp]
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280 // [00 reg 100][ss index 101] imm32
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281 assert(index != rsp, "illegal addressing mode");
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282 emit_byte(0x04 | reg->encoding() << 3);
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283 emit_byte(scale << 6 | index->encoding() << 3 | 0x05);
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284 emit_data(disp, rspec, disp32_operand);
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285 } else {
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286 // [disp]
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287 // [00 reg 101] imm32
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288 emit_byte(0x05 | reg->encoding() << 3);
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289 emit_data(disp, rspec, disp32_operand);
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290 }
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291 }
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292 }
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293
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294 // Secret local extension to Assembler::WhichOperand:
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295 #define end_pc_operand (_WhichOperand_limit)
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296
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297 address Assembler::locate_operand(address inst, WhichOperand which) {
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298 // Decode the given instruction, and return the address of
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299 // an embedded 32-bit operand word.
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300
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301 // If "which" is disp32_operand, selects the displacement portion
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302 // of an effective address specifier.
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303 // If "which" is imm32_operand, selects the trailing immediate constant.
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304 // If "which" is call32_operand, selects the displacement of a call or jump.
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305 // Caller is responsible for ensuring that there is such an operand,
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306 // and that it is 32 bits wide.
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307
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308 // If "which" is end_pc_operand, find the end of the instruction.
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309
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310 address ip = inst;
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311
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312 debug_only(bool has_imm32 = false);
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313 int tail_size = 0; // other random bytes (#32, #16, etc.) at end of insn
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314
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315 again_after_prefix:
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316 switch (0xFF & *ip++) {
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317
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318 // These convenience macros generate groups of "case" labels for the switch.
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319 #define REP4(x) (x)+0: case (x)+1: case (x)+2: case (x)+3
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320 #define REP8(x) (x)+0: case (x)+1: case (x)+2: case (x)+3: \
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321 case (x)+4: case (x)+5: case (x)+6: case (x)+7
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322 #define REP16(x) REP8((x)+0): \
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323 case REP8((x)+8)
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324
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325 case CS_segment:
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326 case SS_segment:
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327 case DS_segment:
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328 case ES_segment:
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329 case FS_segment:
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330 case GS_segment:
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331 assert(ip == inst+1, "only one prefix allowed");
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332 goto again_after_prefix;
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333
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334 case 0xFF: // pushl a; decl a; incl a; call a; jmp a
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335 case 0x88: // movb a, r
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336 case 0x89: // movl a, r
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337 case 0x8A: // movb r, a
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338 case 0x8B: // movl r, a
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339 case 0x8F: // popl a
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340 break;
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341
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342 case 0x68: // pushl #32(oop?)
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343 if (which == end_pc_operand) return ip + 4;
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344 assert(which == imm32_operand, "pushl has no disp32");
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345 return ip; // not produced by emit_operand
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346
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347 case 0x66: // movw ... (size prefix)
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348 switch (0xFF & *ip++) {
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349 case 0x8B: // movw r, a
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350 case 0x89: // movw a, r
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351 break;
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352 case 0xC7: // movw a, #16
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353 tail_size = 2; // the imm16
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354 break;
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355 case 0x0F: // several SSE/SSE2 variants
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356 ip--; // reparse the 0x0F
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357 goto again_after_prefix;
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358 default:
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359 ShouldNotReachHere();
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360 }
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361 break;
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362
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363 case REP8(0xB8): // movl r, #32(oop?)
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364 if (which == end_pc_operand) return ip + 4;
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365 assert(which == imm32_operand || which == disp32_operand, "");
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366 return ip;
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367
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368 case 0x69: // imul r, a, #32
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369 case 0xC7: // movl a, #32(oop?)
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370 tail_size = 4;
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371 debug_only(has_imm32 = true); // has both kinds of operands!
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372 break;
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373
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374 case 0x0F: // movx..., etc.
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375 switch (0xFF & *ip++) {
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376 case 0x12: // movlps
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377 case 0x28: // movaps
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378 case 0x2E: // ucomiss
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379 case 0x2F: // comiss
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380 case 0x54: // andps
|
|
|
381 case 0x55: // andnps
|
|
|
382 case 0x56: // orps
|
|
|
383 case 0x57: // xorps
|
|
|
384 case 0x6E: // movd
|
|
|
385 case 0x7E: // movd
|
|
|
386 case 0xAE: // ldmxcsr a
|
|
|
387 // amd side says it these have both operands but that doesn't
|
|
|
388 // appear to be true.
|
|
|
389 // debug_only(has_imm32 = true); // has both kinds of operands!
|
|
|
390 break;
|
|
|
391
|
|
|
392 case 0xAD: // shrd r, a, %cl
|
|
|
393 case 0xAF: // imul r, a
|
|
|
394 case 0xBE: // movsxb r, a
|
|
|
395 case 0xBF: // movsxw r, a
|
|
|
396 case 0xB6: // movzxb r, a
|
|
|
397 case 0xB7: // movzxw r, a
|
|
|
398 case REP16(0x40): // cmovl cc, r, a
|
|
|
399 case 0xB0: // cmpxchgb
|
|
|
400 case 0xB1: // cmpxchg
|
|
|
401 case 0xC1: // xaddl
|
|
|
402 case 0xC7: // cmpxchg8
|
|
|
403 case REP16(0x90): // setcc a
|
|
|
404 // fall out of the switch to decode the address
|
|
|
405 break;
|
|
|
406 case 0xAC: // shrd r, a, #8
|
|
|
407 tail_size = 1; // the imm8
|
|
|
408 break;
|
|
|
409 case REP16(0x80): // jcc rdisp32
|
|
|
410 if (which == end_pc_operand) return ip + 4;
|
|
|
411 assert(which == call32_operand, "jcc has no disp32 or imm32");
|
|
|
412 return ip;
|
|
|
413 default:
|
|
|
414 ShouldNotReachHere();
|
|
|
415 }
|
|
|
416 break;
|
|
|
417
|
|
|
418 case 0x81: // addl a, #32; addl r, #32
|
|
|
419 // also: orl, adcl, sbbl, andl, subl, xorl, cmpl
|
|
|
420 // in the case of cmpl, the imm32 might be an oop
|
|
|
421 tail_size = 4;
|
|
|
422 debug_only(has_imm32 = true); // has both kinds of operands!
|
|
|
423 break;
|
|
|
424
|
|
|
425 case 0x85: // test r/m, r
|
|
|
426 break;
|
|
|
427
|
|
|
428 case 0x83: // addl a, #8; addl r, #8
|
|
|
429 // also: orl, adcl, sbbl, andl, subl, xorl, cmpl
|
|
|
430 tail_size = 1;
|
|
|
431 break;
|
|
|
432
|
|
|
433 case 0x9B:
|
|
|
434 switch (0xFF & *ip++) {
|
|
|
435 case 0xD9: // fnstcw a
|
|
|
436 break;
|
|
|
437 default:
|
|
|
438 ShouldNotReachHere();
|
|
|
439 }
|
|
|
440 break;
|
|
|
441
|
|
|
442 case REP4(0x00): // addb a, r; addl a, r; addb r, a; addl r, a
|
|
|
443 case REP4(0x10): // adc...
|
|
|
444 case REP4(0x20): // and...
|
|
|
445 case REP4(0x30): // xor...
|
|
|
446 case REP4(0x08): // or...
|
|
|
447 case REP4(0x18): // sbb...
|
|
|
448 case REP4(0x28): // sub...
|
|
|
449 case REP4(0x38): // cmp...
|
|
|
450 case 0xF7: // mull a
|
|
|
451 case 0x8D: // leal r, a
|
|
|
452 case 0x87: // xchg r, a
|
|
|
453 break;
|
|
|
454
|
|
|
455 case 0xC1: // sal a, #8; sar a, #8; shl a, #8; shr a, #8
|
|
|
456 case 0xC6: // movb a, #8
|
|
|
457 case 0x80: // cmpb a, #8
|
|
|
458 case 0x6B: // imul r, a, #8
|
|
|
459 tail_size = 1; // the imm8
|
|
|
460 break;
|
|
|
461
|
|
|
462 case 0xE8: // call rdisp32
|
|
|
463 case 0xE9: // jmp rdisp32
|
|
|
464 if (which == end_pc_operand) return ip + 4;
|
|
|
465 assert(which == call32_operand, "call has no disp32 or imm32");
|
|
|
466 return ip;
|
|
|
467
|
|
|
468 case 0xD1: // sal a, 1; sar a, 1; shl a, 1; shr a, 1
|
|
|
469 case 0xD3: // sal a, %cl; sar a, %cl; shl a, %cl; shr a, %cl
|
|
|
470 case 0xD9: // fld_s a; fst_s a; fstp_s a; fldcw a
|
|
|
471 case 0xDD: // fld_d a; fst_d a; fstp_d a
|
|
|
472 case 0xDB: // fild_s a; fistp_s a; fld_x a; fstp_x a
|
|
|
473 case 0xDF: // fild_d a; fistp_d a
|
|
|
474 case 0xD8: // fadd_s a; fsubr_s a; fmul_s a; fdivr_s a; fcomp_s a
|
|
|
475 case 0xDC: // fadd_d a; fsubr_d a; fmul_d a; fdivr_d a; fcomp_d a
|
|
|
476 case 0xDE: // faddp_d a; fsubrp_d a; fmulp_d a; fdivrp_d a; fcompp_d a
|
|
|
477 break;
|
|
|
478
|
|
|
479 case 0xF3: // For SSE
|
|
|
480 case 0xF2: // For SSE2
|
|
|
481 ip++; ip++;
|
|
|
482 break;
|
|
|
483
|
|
|
484 default:
|
|
|
485 ShouldNotReachHere();
|
|
|
486
|
|
|
487 #undef REP8
|
|
|
488 #undef REP16
|
|
|
489 }
|
|
|
490
|
|
|
491 assert(which != call32_operand, "instruction is not a call, jmp, or jcc");
|
|
|
492 assert(which != imm32_operand || has_imm32, "instruction has no imm32 field");
|
|
|
493
|
|
|
494 // parse the output of emit_operand
|
|
|
495 int op2 = 0xFF & *ip++;
|
|
|
496 int base = op2 & 0x07;
|
|
|
497 int op3 = -1;
|
|
|
498 const int b100 = 4;
|
|
|
499 const int b101 = 5;
|
|
|
500 if (base == b100 && (op2 >> 6) != 3) {
|
|
|
501 op3 = 0xFF & *ip++;
|
|
|
502 base = op3 & 0x07; // refetch the base
|
|
|
503 }
|
|
|
504 // now ip points at the disp (if any)
|
|
|
505
|
|
|
506 switch (op2 >> 6) {
|
|
|
507 case 0:
|
|
|
508 // [00 reg 100][ss index base]
|
|
|
509 // [00 reg 100][00 100 rsp]
|
|
|
510 // [00 reg base]
|
|
|
511 // [00 reg 100][ss index 101][disp32]
|
|
|
512 // [00 reg 101] [disp32]
|
|
|
513
|
|
|
514 if (base == b101) {
|
|
|
515 if (which == disp32_operand)
|
|
|
516 return ip; // caller wants the disp32
|
|
|
517 ip += 4; // skip the disp32
|
|
|
518 }
|
|
|
519 break;
|
|
|
520
|
|
|
521 case 1:
|
|
|
522 // [01 reg 100][ss index base][disp8]
|
|
|
523 // [01 reg 100][00 100 rsp][disp8]
|
|
|
524 // [01 reg base] [disp8]
|
|
|
525 ip += 1; // skip the disp8
|
|
|
526 break;
|
|
|
527
|
|
|
528 case 2:
|
|
|
529 // [10 reg 100][ss index base][disp32]
|
|
|
530 // [10 reg 100][00 100 rsp][disp32]
|
|
|
531 // [10 reg base] [disp32]
|
|
|
532 if (which == disp32_operand)
|
|
|
533 return ip; // caller wants the disp32
|
|
|
534 ip += 4; // skip the disp32
|
|
|
535 break;
|
|
|
536
|
|
|
537 case 3:
|
|
|
538 // [11 reg base] (not a memory addressing mode)
|
|
|
539 break;
|
|
|
540 }
|
|
|
541
|
|
|
542 if (which == end_pc_operand) {
|
|
|
543 return ip + tail_size;
|
|
|
544 }
|
|
|
545
|
|
|
546 assert(which == imm32_operand, "instruction has only an imm32 field");
|
|
|
547 return ip;
|
|
|
548 }
|
|
|
549
|
|
|
550 address Assembler::locate_next_instruction(address inst) {
|
|
|
551 // Secretly share code with locate_operand:
|
|
|
552 return locate_operand(inst, end_pc_operand);
|
|
|
553 }
|
|
|
554
|
|
|
555
|
|
|
556 #ifdef ASSERT
|
|
|
557 void Assembler::check_relocation(RelocationHolder const& rspec, int format) {
|
|
|
558 address inst = inst_mark();
|
|
|
559 assert(inst != NULL && inst < pc(), "must point to beginning of instruction");
|
|
|
560 address opnd;
|
|
|
561
|
|
|
562 Relocation* r = rspec.reloc();
|
|
|
563 if (r->type() == relocInfo::none) {
|
|
|
564 return;
|
|
|
565 } else if (r->is_call() || format == call32_operand) {
|
|
|
566 // assert(format == imm32_operand, "cannot specify a nonzero format");
|
|
|
567 opnd = locate_operand(inst, call32_operand);
|
|
|
568 } else if (r->is_data()) {
|
|
|
569 assert(format == imm32_operand || format == disp32_operand, "format ok");
|
|
|
570 opnd = locate_operand(inst, (WhichOperand)format);
|
|
|
571 } else {
|
|
|
572 assert(format == imm32_operand, "cannot specify a format");
|
|
|
573 return;
|
|
|
574 }
|
|
|
575 assert(opnd == pc(), "must put operand where relocs can find it");
|
|
|
576 }
|
|
|
577 #endif
|
|
|
578
|
|
|
579
|
|
|
580
|
|
|
581 void Assembler::emit_operand(Register reg, Address adr) {
|
|
|
582 emit_operand(reg, adr._base, adr._index, adr._scale, adr._disp, adr._rspec);
|
|
|
583 }
|
|
|
584
|
|
|
585
|
|
|
586 void Assembler::emit_farith(int b1, int b2, int i) {
|
|
|
587 assert(isByte(b1) && isByte(b2), "wrong opcode");
|
|
|
588 assert(0 <= i && i < 8, "illegal stack offset");
|
|
|
589 emit_byte(b1);
|
|
|
590 emit_byte(b2 + i);
|
|
|
591 }
|
|
|
592
|
|
|
593
|
|
|
594 void Assembler::pushad() {
|
|
|
595 emit_byte(0x60);
|
|
|
596 }
|
|
|
597
|
|
|
598 void Assembler::popad() {
|
|
|
599 emit_byte(0x61);
|
|
|
600 }
|
|
|
601
|
|
|
602 void Assembler::pushfd() {
|
|
|
603 emit_byte(0x9C);
|
|
|
604 }
|
|
|
605
|
|
|
606 void Assembler::popfd() {
|
|
|
607 emit_byte(0x9D);
|
|
|
608 }
|
|
|
609
|
|
|
610 void Assembler::pushl(int imm32) {
|
|
|
611 emit_byte(0x68);
|
|
|
612 emit_long(imm32);
|
|
|
613 }
|
|
|
614
|
|
|
615 #ifndef _LP64
|
|
|
616 void Assembler::push_literal32(int32_t imm32, RelocationHolder const& rspec) {
|
|
|
617 InstructionMark im(this);
|
|
|
618 emit_byte(0x68);
|
|
|
619 emit_data(imm32, rspec, 0);
|
|
|
620 }
|
|
|
621 #endif // _LP64
|
|
|
622
|
|
|
623 void Assembler::pushl(Register src) {
|
|
|
624 emit_byte(0x50 | src->encoding());
|
|
|
625 }
|
|
|
626
|
|
|
627
|
|
|
628 void Assembler::pushl(Address src) {
|
|
|
629 InstructionMark im(this);
|
|
|
630 emit_byte(0xFF);
|
|
|
631 emit_operand(rsi, src);
|
|
|
632 }
|
|
|
633
|
|
|
634 void Assembler::popl(Register dst) {
|
|
|
635 emit_byte(0x58 | dst->encoding());
|
|
|
636 }
|
|
|
637
|
|
|
638
|
|
|
639 void Assembler::popl(Address dst) {
|
|
|
640 InstructionMark im(this);
|
|
|
641 emit_byte(0x8F);
|
|
|
642 emit_operand(rax, dst);
|
|
|
643 }
|
|
|
644
|
|
|
645
|
|
|
646 void Assembler::prefix(Prefix p) {
|
|
|
647 a_byte(p);
|
|
|
648 }
|
|
|
649
|
|
|
650
|
|
|
651 void Assembler::movb(Register dst, Address src) {
|
|
|
652 assert(dst->has_byte_register(), "must have byte register");
|
|
|
653 InstructionMark im(this);
|
|
|
654 emit_byte(0x8A);
|
|
|
655 emit_operand(dst, src);
|
|
|
656 }
|
|
|
657
|
|
|
658
|
|
|
659 void Assembler::movb(Address dst, int imm8) {
|
|
|
660 InstructionMark im(this);
|
|
|
661 emit_byte(0xC6);
|
|
|
662 emit_operand(rax, dst);
|
|
|
663 emit_byte(imm8);
|
|
|
664 }
|
|
|
665
|
|
|
666
|
|
|
667 void Assembler::movb(Address dst, Register src) {
|
|
|
668 assert(src->has_byte_register(), "must have byte register");
|
|
|
669 InstructionMark im(this);
|
|
|
670 emit_byte(0x88);
|
|
|
671 emit_operand(src, dst);
|
|
|
672 }
|
|
|
673
|
|
|
674
|
|
|
675 void Assembler::movw(Address dst, int imm16) {
|
|
|
676 InstructionMark im(this);
|
|
|
677
|
|
|
678 emit_byte(0x66); // switch to 16-bit mode
|
|
|
679 emit_byte(0xC7);
|
|
|
680 emit_operand(rax, dst);
|
|
|
681 emit_word(imm16);
|
|
|
682 }
|
|
|
683
|
|
|
684
|
|
|
685 void Assembler::movw(Register dst, Address src) {
|
|
|
686 InstructionMark im(this);
|
|
|
687 emit_byte(0x66);
|
|
|
688 emit_byte(0x8B);
|
|
|
689 emit_operand(dst, src);
|
|
|
690 }
|
|
|
691
|
|
|
692
|
|
|
693 void Assembler::movw(Address dst, Register src) {
|
|
|
694 InstructionMark im(this);
|
|
|
695 emit_byte(0x66);
|
|
|
696 emit_byte(0x89);
|
|
|
697 emit_operand(src, dst);
|
|
|
698 }
|
|
|
699
|
|
|
700
|
|
|
701 void Assembler::movl(Register dst, int imm32) {
|
|
|
702 emit_byte(0xB8 | dst->encoding());
|
|
|
703 emit_long(imm32);
|
|
|
704 }
|
|
|
705
|
|
|
706 #ifndef _LP64
|
|
|
707 void Assembler::mov_literal32(Register dst, int32_t imm32, RelocationHolder const& rspec) {
|
|
|
708
|
|
|
709 InstructionMark im(this);
|
|
|
710 emit_byte(0xB8 | dst->encoding());
|
|
|
711 emit_data((int)imm32, rspec, 0);
|
|
|
712 }
|
|
|
713 #endif // _LP64
|
|
|
714
|
|
|
715 void Assembler::movl(Register dst, Register src) {
|
|
|
716 emit_byte(0x8B);
|
|
|
717 emit_byte(0xC0 | (dst->encoding() << 3) | src->encoding());
|
|
|
718 }
|
|
|
719
|
|
|
720
|
|
|
721 void Assembler::movl(Register dst, Address src) {
|
|
|
722 InstructionMark im(this);
|
|
|
723 emit_byte(0x8B);
|
|
|
724 emit_operand(dst, src);
|
|
|
725 }
|
|
|
726
|
|
|
727
|
|
|
728 void Assembler::movl(Address dst, int imm32) {
|
|
|
729 InstructionMark im(this);
|
|
|
730 emit_byte(0xC7);
|
|
|
731 emit_operand(rax, dst);
|
|
|
732 emit_long(imm32);
|
|
|
733 }
|
|
|
734
|
|
|
735 #ifndef _LP64
|
|
|
736 void Assembler::mov_literal32(Address dst, int32_t imm32, RelocationHolder const& rspec) {
|
|
|
737 InstructionMark im(this);
|
|
|
738 emit_byte(0xC7);
|
|
|
739 emit_operand(rax, dst);
|
|
|
740 emit_data((int)imm32, rspec, 0);
|
|
|
741 }
|
|
|
742 #endif // _LP64
|
|
|
743
|
|
|
744 void Assembler::movl(Address dst, Register src) {
|
|
|
745 InstructionMark im(this);
|
|
|
746 emit_byte(0x89);
|
|
|
747 emit_operand(src, dst);
|
|
|
748 }
|
|
|
749
|
|
|
750 void Assembler::movsxb(Register dst, Address src) {
|
|
|
751 InstructionMark im(this);
|
|
|
752 emit_byte(0x0F);
|
|
|
753 emit_byte(0xBE);
|
|
|
754 emit_operand(dst, src);
|
|
|
755 }
|
|
|
756
|
|
|
757 void Assembler::movsxb(Register dst, Register src) {
|
|
|
758 assert(src->has_byte_register(), "must have byte register");
|
|
|
759 emit_byte(0x0F);
|
|
|
760 emit_byte(0xBE);
|
|
|
761 emit_byte(0xC0 | (dst->encoding() << 3) | src->encoding());
|
|
|
762 }
|
|
|
763
|
|
|
764
|
|
|
765 void Assembler::movsxw(Register dst, Address src) {
|
|
|
766 InstructionMark im(this);
|
|
|
767 emit_byte(0x0F);
|
|
|
768 emit_byte(0xBF);
|
|
|
769 emit_operand(dst, src);
|
|
|
770 }
|
|
|
771
|
|
|
772
|
|
|
773 void Assembler::movsxw(Register dst, Register src) {
|
|
|
774 emit_byte(0x0F);
|
|
|
775 emit_byte(0xBF);
|
|
|
776 emit_byte(0xC0 | (dst->encoding() << 3) | src->encoding());
|
|
|
777 }
|
|
|
778
|
|
|
779
|
|
|
780 void Assembler::movzxb(Register dst, Address src) {
|
|
|
781 InstructionMark im(this);
|
|
|
782 emit_byte(0x0F);
|
|
|
783 emit_byte(0xB6);
|
|
|
784 emit_operand(dst, src);
|
|
|
785 }
|
|
|
786
|
|
|
787
|
|
|
788 void Assembler::movzxb(Register dst, Register src) {
|
|
|
789 assert(src->has_byte_register(), "must have byte register");
|
|
|
790 emit_byte(0x0F);
|
|
|
791 emit_byte(0xB6);
|
|
|
792 emit_byte(0xC0 | (dst->encoding() << 3) | src->encoding());
|
|
|
793 }
|
|
|
794
|
|
|
795
|
|
|
796 void Assembler::movzxw(Register dst, Address src) {
|
|
|
797 InstructionMark im(this);
|
|
|
798 emit_byte(0x0F);
|
|
|
799 emit_byte(0xB7);
|
|
|
800 emit_operand(dst, src);
|
|
|
801 }
|
|
|
802
|
|
|
803
|
|
|
804 void Assembler::movzxw(Register dst, Register src) {
|
|
|
805 emit_byte(0x0F);
|
|
|
806 emit_byte(0xB7);
|
|
|
807 emit_byte(0xC0 | (dst->encoding() << 3) | src->encoding());
|
|
|
808 }
|
|
|
809
|
|
|
810
|
|
|
811 void Assembler::cmovl(Condition cc, Register dst, Register src) {
|
|
|
812 guarantee(VM_Version::supports_cmov(), "illegal instruction");
|
|
|
813 emit_byte(0x0F);
|
|
|
814 emit_byte(0x40 | cc);
|
|
|
815 emit_byte(0xC0 | (dst->encoding() << 3) | src->encoding());
|
|
|
816 }
|
|
|
817
|
|
|
818
|
|
|
819 void Assembler::cmovl(Condition cc, Register dst, Address src) {
|
|
|
820 guarantee(VM_Version::supports_cmov(), "illegal instruction");
|
|
|
821 // The code below seems to be wrong - however the manual is inconclusive
|
|
|
822 // do not use for now (remember to enable all callers when fixing this)
|
|
|
823 Unimplemented();
|
|
|
824 // wrong bytes?
|
|
|
825 InstructionMark im(this);
|
|
|
826 emit_byte(0x0F);
|
|
|
827 emit_byte(0x40 | cc);
|
|
|
828 emit_operand(dst, src);
|
|
|
829 }
|
|
|
830
|
|
|
831
|
|
|
832 void Assembler::prefetcht0(Address src) {
|
|
|
833 assert(VM_Version::supports_sse(), "must support");
|
|
|
834 InstructionMark im(this);
|
|
|
835 emit_byte(0x0F);
|
|
|
836 emit_byte(0x18);
|
|
|
837 emit_operand(rcx, src); // 1, src
|
|
|
838 }
|
|
|
839
|
|
|
840
|
|
|
841 void Assembler::prefetcht1(Address src) {
|
|
|
842 assert(VM_Version::supports_sse(), "must support");
|
|
|
843 InstructionMark im(this);
|
|
|
844 emit_byte(0x0F);
|
|
|
845 emit_byte(0x18);
|
|
|
846 emit_operand(rdx, src); // 2, src
|
|
|
847 }
|
|
|
848
|
|
|
849
|
|
|
850 void Assembler::prefetcht2(Address src) {
|
|
|
851 assert(VM_Version::supports_sse(), "must support");
|
|
|
852 InstructionMark im(this);
|
|
|
853 emit_byte(0x0F);
|
|
|
854 emit_byte(0x18);
|
|
|
855 emit_operand(rbx, src); // 3, src
|
|
|
856 }
|
|
|
857
|
|
|
858
|
|
|
859 void Assembler::prefetchnta(Address src) {
|
|
|
860 assert(VM_Version::supports_sse2(), "must support");
|
|
|
861 InstructionMark im(this);
|
|
|
862 emit_byte(0x0F);
|
|
|
863 emit_byte(0x18);
|
|
|
864 emit_operand(rax, src); // 0, src
|
|
|
865 }
|
|
|
866
|
|
|
867
|
|
|
868 void Assembler::prefetchw(Address src) {
|
|
|
869 assert(VM_Version::supports_3dnow(), "must support");
|
|
|
870 InstructionMark im(this);
|
|
|
871 emit_byte(0x0F);
|
|
|
872 emit_byte(0x0D);
|
|
|
873 emit_operand(rcx, src); // 1, src
|
|
|
874 }
|
|
|
875
|
|
|
876
|
|
|
877 void Assembler::prefetchr(Address src) {
|
|
|
878 assert(VM_Version::supports_3dnow(), "must support");
|
|
|
879 InstructionMark im(this);
|
|
|
880 emit_byte(0x0F);
|
|
|
881 emit_byte(0x0D);
|
|
|
882 emit_operand(rax, src); // 0, src
|
|
|
883 }
|
|
|
884
|
|
|
885
|
|
|
886 void Assembler::adcl(Register dst, int imm32) {
|
|
|
887 emit_arith(0x81, 0xD0, dst, imm32);
|
|
|
888 }
|
|
|
889
|
|
|
890
|
|
|
891 void Assembler::adcl(Register dst, Address src) {
|
|
|
892 InstructionMark im(this);
|
|
|
893 emit_byte(0x13);
|
|
|
894 emit_operand(dst, src);
|
|
|
895 }
|
|
|
896
|
|
|
897
|
|
|
898 void Assembler::adcl(Register dst, Register src) {
|
|
|
899 emit_arith(0x13, 0xC0, dst, src);
|
|
|
900 }
|
|
|
901
|
|
|
902
|
|
|
903 void Assembler::addl(Address dst, int imm32) {
|
|
|
904 InstructionMark im(this);
|
|
|
905 emit_arith_operand(0x81,rax,dst,imm32);
|
|
|
906 }
|
|
|
907
|
|
|
908
|
|
|
909 void Assembler::addl(Address dst, Register src) {
|
|
|
910 InstructionMark im(this);
|
|
|
911 emit_byte(0x01);
|
|
|
912 emit_operand(src, dst);
|
|
|
913 }
|
|
|
914
|
|
|
915
|
|
|
916 void Assembler::addl(Register dst, int imm32) {
|
|
|
917 emit_arith(0x81, 0xC0, dst, imm32);
|
|
|
918 }
|
|
|
919
|
|
|
920
|
|
|
921 void Assembler::addl(Register dst, Address src) {
|
|
|
922 InstructionMark im(this);
|
|
|
923 emit_byte(0x03);
|
|
|
924 emit_operand(dst, src);
|
|
|
925 }
|
|
|
926
|
|
|
927
|
|
|
928 void Assembler::addl(Register dst, Register src) {
|
|
|
929 emit_arith(0x03, 0xC0, dst, src);
|
|
|
930 }
|
|
|
931
|
|
|
932
|
|
|
933 void Assembler::andl(Register dst, int imm32) {
|
|
|
934 emit_arith(0x81, 0xE0, dst, imm32);
|
|
|
935 }
|
|
|
936
|
|
|
937
|
|
|
938 void Assembler::andl(Register dst, Address src) {
|
|
|
939 InstructionMark im(this);
|
|
|
940 emit_byte(0x23);
|
|
|
941 emit_operand(dst, src);
|
|
|
942 }
|
|
|
943
|
|
|
944
|
|
|
945 void Assembler::andl(Register dst, Register src) {
|
|
|
946 emit_arith(0x23, 0xC0, dst, src);
|
|
|
947 }
|
|
|
948
|
|
|
949
|
|
|
950 void Assembler::cmpb(Address dst, int imm8) {
|
|
|
951 InstructionMark im(this);
|
|
|
952 emit_byte(0x80);
|
|
|
953 emit_operand(rdi, dst);
|
|
|
954 emit_byte(imm8);
|
|
|
955 }
|
|
|
956
|
|
|
957 void Assembler::cmpw(Address dst, int imm16) {
|
|
|
958 InstructionMark im(this);
|
|
|
959 emit_byte(0x66);
|
|
|
960 emit_byte(0x81);
|
|
|
961 emit_operand(rdi, dst);
|
|
|
962 emit_word(imm16);
|
|
|
963 }
|
|
|
964
|
|
|
965 void Assembler::cmpl(Address dst, int imm32) {
|
|
|
966 InstructionMark im(this);
|
|
|
967 emit_byte(0x81);
|
|
|
968 emit_operand(rdi, dst);
|
|
|
969 emit_long(imm32);
|
|
|
970 }
|
|
|
971
|
|
|
972 #ifndef _LP64
|
|
|
973 void Assembler::cmp_literal32(Register src1, int32_t imm32, RelocationHolder const& rspec) {
|
|
|
974 InstructionMark im(this);
|
|
|
975 emit_byte(0x81);
|
|
|
976 emit_byte(0xF8 | src1->encoding());
|
|
|
977 emit_data(imm32, rspec, 0);
|
|
|
978 }
|
|
|
979
|
|
|
980 void Assembler::cmp_literal32(Address src1, int32_t imm32, RelocationHolder const& rspec) {
|
|
|
981 InstructionMark im(this);
|
|
|
982 emit_byte(0x81);
|
|
|
983 emit_operand(rdi, src1);
|
|
|
984 emit_data(imm32, rspec, 0);
|
|
|
985 }
|
|
|
986 #endif // _LP64
|
|
|
987
|
|
|
988
|
|
|
989 void Assembler::cmpl(Register dst, int imm32) {
|
|
|
990 emit_arith(0x81, 0xF8, dst, imm32);
|
|
|
991 }
|
|
|
992
|
|
|
993
|
|
|
994 void Assembler::cmpl(Register dst, Register src) {
|
|
|
995 emit_arith(0x3B, 0xC0, dst, src);
|
|
|
996 }
|
|
|
997
|
|
|
998
|
|
|
999 void Assembler::cmpl(Register dst, Address src) {
|
|
|
1000 InstructionMark im(this);
|
|
|
1001 emit_byte(0x3B);
|
|
|
1002 emit_operand(dst, src);
|
|
|
1003 }
|
|
|
1004
|
|
|
1005
|
|
|
1006 void Assembler::decl(Register dst) {
|
|
|
1007 // Don't use it directly. Use MacroAssembler::decrement() instead.
|
|
|
1008 emit_byte(0x48 | dst->encoding());
|
|
|
1009 }
|
|
|
1010
|
|
|
1011
|
|
|
1012 void Assembler::decl(Address dst) {
|
|
|
1013 // Don't use it directly. Use MacroAssembler::decrement() instead.
|
|
|
1014 InstructionMark im(this);
|
|
|
1015 emit_byte(0xFF);
|
|
|
1016 emit_operand(rcx, dst);
|
|
|
1017 }
|
|
|
1018
|
|
|
1019
|
|
|
1020 void Assembler::idivl(Register src) {
|
|
|
1021 emit_byte(0xF7);
|
|
|
1022 emit_byte(0xF8 | src->encoding());
|
|
|
1023 }
|
|
|
1024
|
|
|
1025
|
|
|
1026 void Assembler::cdql() {
|
|
|
1027 emit_byte(0x99);
|
|
|
1028 }
|
|
|
1029
|
|
|
1030
|
|
|
1031 void Assembler::imull(Register dst, Register src) {
|
|
|
1032 emit_byte(0x0F);
|
|
|
1033 emit_byte(0xAF);
|
|
|
1034 emit_byte(0xC0 | dst->encoding() << 3 | src->encoding());
|
|
|
1035 }
|
|
|
1036
|
|
|
1037
|
|
|
1038 void Assembler::imull(Register dst, Register src, int value) {
|
|
|
1039 if (is8bit(value)) {
|
|
|
1040 emit_byte(0x6B);
|
|
|
1041 emit_byte(0xC0 | dst->encoding() << 3 | src->encoding());
|
|
|
1042 emit_byte(value);
|
|
|
1043 } else {
|
|
|
1044 emit_byte(0x69);
|
|
|
1045 emit_byte(0xC0 | dst->encoding() << 3 | src->encoding());
|
|
|
1046 emit_long(value);
|
|
|
1047 }
|
|
|
1048 }
|
|
|
1049
|
|
|
1050
|
|
|
1051 void Assembler::incl(Register dst) {
|
|
|
1052 // Don't use it directly. Use MacroAssembler::increment() instead.
|
|
|
1053 emit_byte(0x40 | dst->encoding());
|
|
|
1054 }
|
|
|
1055
|
|
|
1056
|
|
|
1057 void Assembler::incl(Address dst) {
|
|
|
1058 // Don't use it directly. Use MacroAssembler::increment() instead.
|
|
|
1059 InstructionMark im(this);
|
|
|
1060 emit_byte(0xFF);
|
|
|
1061 emit_operand(rax, dst);
|
|
|
1062 }
|
|
|
1063
|
|
|
1064
|
|
|
1065 void Assembler::leal(Register dst, Address src) {
|
|
|
1066 InstructionMark im(this);
|
|
|
1067 emit_byte(0x8D);
|
|
|
1068 emit_operand(dst, src);
|
|
|
1069 }
|
|
|
1070
|
|
|
1071 void Assembler::mull(Address src) {
|
|
|
1072 InstructionMark im(this);
|
|
|
1073 emit_byte(0xF7);
|
|
|
1074 emit_operand(rsp, src);
|
|
|
1075 }
|
|
|
1076
|
|
|
1077
|
|
|
1078 void Assembler::mull(Register src) {
|
|
|
1079 emit_byte(0xF7);
|
|
|
1080 emit_byte(0xE0 | src->encoding());
|
|
|
1081 }
|
|
|
1082
|
|
|
1083
|
|
|
1084 void Assembler::negl(Register dst) {
|
|
|
1085 emit_byte(0xF7);
|
|
|
1086 emit_byte(0xD8 | dst->encoding());
|
|
|
1087 }
|
|
|
1088
|
|
|
1089
|
|
|
1090 void Assembler::notl(Register dst) {
|
|
|
1091 emit_byte(0xF7);
|
|
|
1092 emit_byte(0xD0 | dst->encoding());
|
|
|
1093 }
|
|
|
1094
|
|
|
1095
|
|
|
1096 void Assembler::orl(Address dst, int imm32) {
|
|
|
1097 InstructionMark im(this);
|
|
|
1098 emit_byte(0x81);
|
|
|
1099 emit_operand(rcx, dst);
|
|
|
1100 emit_long(imm32);
|
|
|
1101 }
|
|
|
1102
|
|
|
1103 void Assembler::orl(Register dst, int imm32) {
|
|
|
1104 emit_arith(0x81, 0xC8, dst, imm32);
|
|
|
1105 }
|
|
|
1106
|
|
|
1107
|
|
|
1108 void Assembler::orl(Register dst, Address src) {
|
|
|
1109 InstructionMark im(this);
|
|
|
1110 emit_byte(0x0B);
|
|
|
1111 emit_operand(dst, src);
|
|
|
1112 }
|
|
|
1113
|
|
|
1114
|
|
|
1115 void Assembler::orl(Register dst, Register src) {
|
|
|
1116 emit_arith(0x0B, 0xC0, dst, src);
|
|
|
1117 }
|
|
|
1118
|
|
|
1119
|
|
|
1120 void Assembler::rcll(Register dst, int imm8) {
|
|
|
1121 assert(isShiftCount(imm8), "illegal shift count");
|
|
|
1122 if (imm8 == 1) {
|
|
|
1123 emit_byte(0xD1);
|
|
|
1124 emit_byte(0xD0 | dst->encoding());
|
|
|
1125 } else {
|
|
|
1126 emit_byte(0xC1);
|
|
|
1127 emit_byte(0xD0 | dst->encoding());
|
|
|
1128 emit_byte(imm8);
|
|
|
1129 }
|
|
|
1130 }
|
|
|
1131
|
|
|
1132
|
|
|
1133 void Assembler::sarl(Register dst, int imm8) {
|
|
|
1134 assert(isShiftCount(imm8), "illegal shift count");
|
|
|
1135 if (imm8 == 1) {
|
|
|
1136 emit_byte(0xD1);
|
|
|
1137 emit_byte(0xF8 | dst->encoding());
|
|
|
1138 } else {
|
|
|
1139 emit_byte(0xC1);
|
|
|
1140 emit_byte(0xF8 | dst->encoding());
|
|
|
1141 emit_byte(imm8);
|
|
|
1142 }
|
|
|
1143 }
|
|
|
1144
|
|
|
1145
|
|
|
1146 void Assembler::sarl(Register dst) {
|
|
|
1147 emit_byte(0xD3);
|
|
|
1148 emit_byte(0xF8 | dst->encoding());
|
|
|
1149 }
|
|
|
1150
|
|
|
1151
|
|
|
1152 void Assembler::sbbl(Address dst, int imm32) {
|
|
|
1153 InstructionMark im(this);
|
|
|
1154 emit_arith_operand(0x81,rbx,dst,imm32);
|
|
|
1155 }
|
|
|
1156
|
|
|
1157
|
|
|
1158 void Assembler::sbbl(Register dst, int imm32) {
|
|
|
1159 emit_arith(0x81, 0xD8, dst, imm32);
|
|
|
1160 }
|
|
|
1161
|
|
|
1162
|
|
|
1163 void Assembler::sbbl(Register dst, Address src) {
|
|
|
1164 InstructionMark im(this);
|
|
|
1165 emit_byte(0x1B);
|
|
|
1166 emit_operand(dst, src);
|
|
|
1167 }
|
|
|
1168
|
|
|
1169
|
|
|
1170 void Assembler::sbbl(Register dst, Register src) {
|
|
|
1171 emit_arith(0x1B, 0xC0, dst, src);
|
|
|
1172 }
|
|
|
1173
|
|
|
1174
|
|
|
1175 void Assembler::shldl(Register dst, Register src) {
|
|
|
1176 emit_byte(0x0F);
|
|
|
1177 emit_byte(0xA5);
|
|
|
1178 emit_byte(0xC0 | src->encoding() << 3 | dst->encoding());
|
|
|
1179 }
|
|
|
1180
|
|
|
1181
|
|
|
1182 void Assembler::shll(Register dst, int imm8) {
|
|
|
1183 assert(isShiftCount(imm8), "illegal shift count");
|
|
|
1184 if (imm8 == 1 ) {
|
|
|
1185 emit_byte(0xD1);
|
|
|
1186 emit_byte(0xE0 | dst->encoding());
|
|
|
1187 } else {
|
|
|
1188 emit_byte(0xC1);
|
|
|
1189 emit_byte(0xE0 | dst->encoding());
|
|
|
1190 emit_byte(imm8);
|
|
|
1191 }
|
|
|
1192 }
|
|
|
1193
|
|
|
1194
|
|
|
1195 void Assembler::shll(Register dst) {
|
|
|
1196 emit_byte(0xD3);
|
|
|
1197 emit_byte(0xE0 | dst->encoding());
|
|
|
1198 }
|
|
|
1199
|
|
|
1200
|
|
|
1201 void Assembler::shrdl(Register dst, Register src) {
|
|
|
1202 emit_byte(0x0F);
|
|
|
1203 emit_byte(0xAD);
|
|
|
1204 emit_byte(0xC0 | src->encoding() << 3 | dst->encoding());
|
|
|
1205 }
|
|
|
1206
|
|
|
1207
|
|
|
1208 void Assembler::shrl(Register dst, int imm8) {
|
|
|
1209 assert(isShiftCount(imm8), "illegal shift count");
|
|
|
1210 emit_byte(0xC1);
|
|
|
1211 emit_byte(0xE8 | dst->encoding());
|
|
|
1212 emit_byte(imm8);
|
|
|
1213 }
|
|
|
1214
|
|
|
1215
|
|
|
1216 void Assembler::shrl(Register dst) {
|
|
|
1217 emit_byte(0xD3);
|
|
|
1218 emit_byte(0xE8 | dst->encoding());
|
|
|
1219 }
|
|
|
1220
|
|
|
1221
|
|
|
1222 void Assembler::subl(Address dst, int imm32) {
|
|
|
1223 if (is8bit(imm32)) {
|
|
|
1224 InstructionMark im(this);
|
|
|
1225 emit_byte(0x83);
|
|
|
1226 emit_operand(rbp, dst);
|
|
|
1227 emit_byte(imm32 & 0xFF);
|
|
|
1228 } else {
|
|
|
1229 InstructionMark im(this);
|
|
|
1230 emit_byte(0x81);
|
|
|
1231 emit_operand(rbp, dst);
|
|
|
1232 emit_long(imm32);
|
|
|
1233 }
|
|
|
1234 }
|
|
|
1235
|
|
|
1236
|
|
|
1237 void Assembler::subl(Register dst, int imm32) {
|
|
|
1238 emit_arith(0x81, 0xE8, dst, imm32);
|
|
|
1239 }
|
|
|
1240
|
|
|
1241
|
|
|
1242 void Assembler::subl(Address dst, Register src) {
|
|
|
1243 InstructionMark im(this);
|
|
|
1244 emit_byte(0x29);
|
|
|
1245 emit_operand(src, dst);
|
|
|
1246 }
|
|
|
1247
|
|
|
1248
|
|
|
1249 void Assembler::subl(Register dst, Address src) {
|
|
|
1250 InstructionMark im(this);
|
|
|
1251 emit_byte(0x2B);
|
|
|
1252 emit_operand(dst, src);
|
|
|
1253 }
|
|
|
1254
|
|
|
1255
|
|
|
1256 void Assembler::subl(Register dst, Register src) {
|
|
|
1257 emit_arith(0x2B, 0xC0, dst, src);
|
|
|
1258 }
|
|
|
1259
|
|
|
1260
|
|
|
1261 void Assembler::testb(Register dst, int imm8) {
|
|
|
1262 assert(dst->has_byte_register(), "must have byte register");
|
|
|
1263 emit_arith_b(0xF6, 0xC0, dst, imm8);
|
|
|
1264 }
|
|
|
1265
|
|
|
1266
|
|
|
1267 void Assembler::testl(Register dst, int imm32) {
|
|
|
1268 // not using emit_arith because test
|
|
|
1269 // doesn't support sign-extension of
|
|
|
1270 // 8bit operands
|
|
|
1271 if (dst->encoding() == 0) {
|
|
|
1272 emit_byte(0xA9);
|
|
|
1273 } else {
|
|
|
1274 emit_byte(0xF7);
|
|
|
1275 emit_byte(0xC0 | dst->encoding());
|
|
|
1276 }
|
|
|
1277 emit_long(imm32);
|
|
|
1278 }
|
|
|
1279
|
|
|
1280
|
|
|
1281 void Assembler::testl(Register dst, Register src) {
|
|
|
1282 emit_arith(0x85, 0xC0, dst, src);
|
|
|
1283 }
|
|
|
1284
|
|
|
1285 void Assembler::testl(Register dst, Address src) {
|
|
|
1286 InstructionMark im(this);
|
|
|
1287 emit_byte(0x85);
|
|
|
1288 emit_operand(dst, src);
|
|
|
1289 }
|
|
|
1290
|
|
|
1291 void Assembler::xaddl(Address dst, Register src) {
|
|
|
1292 InstructionMark im(this);
|
|
|
1293 emit_byte(0x0F);
|
|
|
1294 emit_byte(0xC1);
|
|
|
1295 emit_operand(src, dst);
|
|
|
1296 }
|
|
|
1297
|
|
|
1298 void Assembler::xorl(Register dst, int imm32) {
|
|
|
1299 emit_arith(0x81, 0xF0, dst, imm32);
|
|
|
1300 }
|
|
|
1301
|
|
|
1302
|
|
|
1303 void Assembler::xorl(Register dst, Address src) {
|
|
|
1304 InstructionMark im(this);
|
|
|
1305 emit_byte(0x33);
|
|
|
1306 emit_operand(dst, src);
|
|
|
1307 }
|
|
|
1308
|
|
|
1309
|
|
|
1310 void Assembler::xorl(Register dst, Register src) {
|
|
|
1311 emit_arith(0x33, 0xC0, dst, src);
|
|
|
1312 }
|
|
|
1313
|
|
|
1314
|
|
|
1315 void Assembler::bswap(Register reg) {
|
|
|
1316 emit_byte(0x0F);
|
|
|
1317 emit_byte(0xC8 | reg->encoding());
|
|
|
1318 }
|
|
|
1319
|
|
|
1320
|
|
|
1321 void Assembler::lock() {
|
|
|
1322 if (Atomics & 1) {
|
|
|
1323 // Emit either nothing, a NOP, or a NOP: prefix
|
|
|
1324 emit_byte(0x90) ;
|
|
|
1325 } else {
|
|
|
1326 emit_byte(0xF0);
|
|
|
1327 }
|
|
|
1328 }
|
|
|
1329
|
|
|
1330
|
|
|
1331 void Assembler::xchg(Register reg, Address adr) {
|
|
|
1332 InstructionMark im(this);
|
|
|
1333 emit_byte(0x87);
|
|
|
1334 emit_operand(reg, adr);
|
|
|
1335 }
|
|
|
1336
|
|
|
1337
|
|
|
1338 void Assembler::xchgl(Register dst, Register src) {
|
|
|
1339 emit_byte(0x87);
|
|
|
1340 emit_byte(0xc0 | dst->encoding() << 3 | src->encoding());
|
|
|
1341 }
|
|
|
1342
|
|
|
1343
|
|
|
1344 // The 32-bit cmpxchg compares the value at adr with the contents of rax,
|
|
|
1345 // and stores reg into adr if so; otherwise, the value at adr is loaded into rax,.
|
|
|
1346 // The ZF is set if the compared values were equal, and cleared otherwise.
|
|
|
1347 void Assembler::cmpxchg(Register reg, Address adr) {
|
|
|
1348 if (Atomics & 2) {
|
|
|
1349 // caveat: no instructionmark, so this isn't relocatable.
|
|
|
1350 // Emit a synthetic, non-atomic, CAS equivalent.
|
|
|
1351 // Beware. The synthetic form sets all ICCs, not just ZF.
|
|
|
1352 // cmpxchg r,[m] is equivalent to rax, = CAS (m, rax, r)
|
|
|
1353 cmpl (rax, adr) ;
|
|
|
1354 movl (rax, adr) ;
|
|
|
1355 if (reg != rax) {
|
|
|
1356 Label L ;
|
|
|
1357 jcc (Assembler::notEqual, L) ;
|
|
|
1358 movl (adr, reg) ;
|
|
|
1359 bind (L) ;
|
|
|
1360 }
|
|
|
1361 } else {
|
|
|
1362 InstructionMark im(this);
|
|
|
1363 emit_byte(0x0F);
|
|
|
1364 emit_byte(0xB1);
|
|
|
1365 emit_operand(reg, adr);
|
|
|
1366 }
|
|
|
1367 }
|
|
|
1368
|
|
|
1369 // The 64-bit cmpxchg compares the value at adr with the contents of rdx:rax,
|
|
|
1370 // and stores rcx:rbx into adr if so; otherwise, the value at adr is loaded
|
|
|
1371 // into rdx:rax. The ZF is set if the compared values were equal, and cleared otherwise.
|
|
|
1372 void Assembler::cmpxchg8(Address adr) {
|
|
|
1373 InstructionMark im(this);
|
|
|
1374 emit_byte(0x0F);
|
|
|
1375 emit_byte(0xc7);
|
|
|
1376 emit_operand(rcx, adr);
|
|
|
1377 }
|
|
|
1378
|
|
|
1379 void Assembler::hlt() {
|
|
|
1380 emit_byte(0xF4);
|
|
|
1381 }
|
|
|
1382
|
|
|
1383
|
|
|
1384 void Assembler::addr_nop_4() {
|
|
|
1385 // 4 bytes: NOP DWORD PTR [EAX+0]
|
|
|
1386 emit_byte(0x0F);
|
|
|
1387 emit_byte(0x1F);
|
|
|
1388 emit_byte(0x40); // emit_rm(cbuf, 0x1, EAX_enc, EAX_enc);
|
|
|
1389 emit_byte(0); // 8-bits offset (1 byte)
|
|
|
1390 }
|
|
|
1391
|
|
|
1392 void Assembler::addr_nop_5() {
|
|
|
1393 // 5 bytes: NOP DWORD PTR [EAX+EAX*0+0] 8-bits offset
|
|
|
1394 emit_byte(0x0F);
|
|
|
1395 emit_byte(0x1F);
|
|
|
1396 emit_byte(0x44); // emit_rm(cbuf, 0x1, EAX_enc, 0x4);
|
|
|
1397 emit_byte(0x00); // emit_rm(cbuf, 0x0, EAX_enc, EAX_enc);
|
|
|
1398 emit_byte(0); // 8-bits offset (1 byte)
|
|
|
1399 }
|
|
|
1400
|
|
|
1401 void Assembler::addr_nop_7() {
|
|
|
1402 // 7 bytes: NOP DWORD PTR [EAX+0] 32-bits offset
|
|
|
1403 emit_byte(0x0F);
|
|
|
1404 emit_byte(0x1F);
|
|
|
1405 emit_byte(0x80); // emit_rm(cbuf, 0x2, EAX_enc, EAX_enc);
|
|
|
1406 emit_long(0); // 32-bits offset (4 bytes)
|
|
|
1407 }
|
|
|
1408
|
|
|
1409 void Assembler::addr_nop_8() {
|
|
|
1410 // 8 bytes: NOP DWORD PTR [EAX+EAX*0+0] 32-bits offset
|
|
|
1411 emit_byte(0x0F);
|
|
|
1412 emit_byte(0x1F);
|
|
|
1413 emit_byte(0x84); // emit_rm(cbuf, 0x2, EAX_enc, 0x4);
|
|
|
1414 emit_byte(0x00); // emit_rm(cbuf, 0x0, EAX_enc, EAX_enc);
|
|
|
1415 emit_long(0); // 32-bits offset (4 bytes)
|
|
|
1416 }
|
|
|
1417
|
|
|
1418 void Assembler::nop(int i) {
|
|
|
1419 assert(i > 0, " ");
|
|
|
1420 if (UseAddressNop && VM_Version::is_intel()) {
|
|
|
1421 //
|
|
|
1422 // Using multi-bytes nops "0x0F 0x1F [address]" for Intel
|
|
|
1423 // 1: 0x90
|
|
|
1424 // 2: 0x66 0x90
|
|
|
1425 // 3: 0x66 0x66 0x90 (don't use "0x0F 0x1F 0x00" - need patching safe padding)
|
|
|
1426 // 4: 0x0F 0x1F 0x40 0x00
|
|
|
1427 // 5: 0x0F 0x1F 0x44 0x00 0x00
|
|
|
1428 // 6: 0x66 0x0F 0x1F 0x44 0x00 0x00
|
|
|
1429 // 7: 0x0F 0x1F 0x80 0x00 0x00 0x00 0x00
|
|
|
1430 // 8: 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00
|
|
|
1431 // 9: 0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00
|
|
|
1432 // 10: 0x66 0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00
|
|
|
1433 // 11: 0x66 0x66 0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00
|
|
|
1434
|
|
|
1435 // The rest coding is Intel specific - don't use consecutive address nops
|
|
|
1436
|
|
|
1437 // 12: 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 0x66 0x66 0x66 0x90
|
|
|
1438 // 13: 0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 0x66 0x66 0x66 0x90
|
|
|
1439 // 14: 0x66 0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 0x66 0x66 0x66 0x90
|
|
|
1440 // 15: 0x66 0x66 0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 0x66 0x66 0x66 0x90
|
|
|
1441
|
|
|
1442 while(i >= 15) {
|
|
|
1443 // For Intel don't generate consecutive addess nops (mix with regular nops)
|
|
|
1444 i -= 15;
|
|
|
1445 emit_byte(0x66); // size prefix
|
|
|
1446 emit_byte(0x66); // size prefix
|
|
|
1447 emit_byte(0x66); // size prefix
|
|
|
1448 addr_nop_8();
|
|
|
1449 emit_byte(0x66); // size prefix
|
|
|
1450 emit_byte(0x66); // size prefix
|
|
|
1451 emit_byte(0x66); // size prefix
|
|
|
1452 emit_byte(0x90); // nop
|
|
|
1453 }
|
|
|
1454 switch (i) {
|
|
|
1455 case 14:
|
|
|
1456 emit_byte(0x66); // size prefix
|
|
|
1457 case 13:
|
|
|
1458 emit_byte(0x66); // size prefix
|
|
|
1459 case 12:
|
|
|
1460 addr_nop_8();
|
|
|
1461 emit_byte(0x66); // size prefix
|
|
|
1462 emit_byte(0x66); // size prefix
|
|
|
1463 emit_byte(0x66); // size prefix
|
|
|
1464 emit_byte(0x90); // nop
|
|
|
1465 break;
|
|
|
1466 case 11:
|
|
|
1467 emit_byte(0x66); // size prefix
|
|
|
1468 case 10:
|
|
|
1469 emit_byte(0x66); // size prefix
|
|
|
1470 case 9:
|
|
|
1471 emit_byte(0x66); // size prefix
|
|
|
1472 case 8:
|
|
|
1473 addr_nop_8();
|
|
|
1474 break;
|
|
|
1475 case 7:
|
|
|
1476 addr_nop_7();
|
|
|
1477 break;
|
|
|
1478 case 6:
|
|
|
1479 emit_byte(0x66); // size prefix
|
|
|
1480 case 5:
|
|
|
1481 addr_nop_5();
|
|
|
1482 break;
|
|
|
1483 case 4:
|
|
|
1484 addr_nop_4();
|
|
|
1485 break;
|
|
|
1486 case 3:
|
|
|
1487 // Don't use "0x0F 0x1F 0x00" - need patching safe padding
|
|
|
1488 emit_byte(0x66); // size prefix
|
|
|
1489 case 2:
|
|
|
1490 emit_byte(0x66); // size prefix
|
|
|
1491 case 1:
|
|
|
1492 emit_byte(0x90); // nop
|
|
|
1493 break;
|
|
|
1494 default:
|
|
|
1495 assert(i == 0, " ");
|
|
|
1496 }
|
|
|
1497 return;
|
|
|
1498 }
|
|
|
1499 if (UseAddressNop && VM_Version::is_amd()) {
|
|
|
1500 //
|
|
|
1501 // Using multi-bytes nops "0x0F 0x1F [address]" for AMD.
|
|
|
1502 // 1: 0x90
|
|
|
1503 // 2: 0x66 0x90
|
|
|
1504 // 3: 0x66 0x66 0x90 (don't use "0x0F 0x1F 0x00" - need patching safe padding)
|
|
|
1505 // 4: 0x0F 0x1F 0x40 0x00
|
|
|
1506 // 5: 0x0F 0x1F 0x44 0x00 0x00
|
|
|
1507 // 6: 0x66 0x0F 0x1F 0x44 0x00 0x00
|
|
|
1508 // 7: 0x0F 0x1F 0x80 0x00 0x00 0x00 0x00
|
|
|
1509 // 8: 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00
|
|
|
1510 // 9: 0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00
|
|
|
1511 // 10: 0x66 0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00
|
|
|
1512 // 11: 0x66 0x66 0x66 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00
|
|
|
1513
|
|
|
1514 // The rest coding is AMD specific - use consecutive address nops
|
|
|
1515
|
|
|
1516 // 12: 0x66 0x0F 0x1F 0x44 0x00 0x00 0x66 0x0F 0x1F 0x44 0x00 0x00
|
|
|
1517 // 13: 0x0F 0x1F 0x80 0x00 0x00 0x00 0x00 0x66 0x0F 0x1F 0x44 0x00 0x00
|
|
|
1518 // 14: 0x0F 0x1F 0x80 0x00 0x00 0x00 0x00 0x0F 0x1F 0x80 0x00 0x00 0x00 0x00
|
|
|
1519 // 15: 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 0x0F 0x1F 0x80 0x00 0x00 0x00 0x00
|
|
|
1520 // 16: 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00 0x0F 0x1F 0x84 0x00 0x00 0x00 0x00 0x00
|
|
|
1521 // Size prefixes (0x66) are added for larger sizes
|
|
|
1522
|
|
|
1523 while(i >= 22) {
|
|
|
1524 i -= 11;
|
|
|
1525 emit_byte(0x66); // size prefix
|
|
|
1526 emit_byte(0x66); // size prefix
|
|
|
1527 emit_byte(0x66); // size prefix
|
|
|
1528 addr_nop_8();
|
|
|
1529 }
|
|
|
1530 // Generate first nop for size between 21-12
|
|
|
1531 switch (i) {
|
|
|
1532 case 21:
|
|
|
1533 i -= 1;
|
|
|
1534 emit_byte(0x66); // size prefix
|
|
|
1535 case 20:
|
|
|
1536 case 19:
|
|
|
1537 i -= 1;
|
|
|
1538 emit_byte(0x66); // size prefix
|
|
|
1539 case 18:
|
|
|
1540 case 17:
|
|
|
1541 i -= 1;
|
|
|
1542 emit_byte(0x66); // size prefix
|
|
|
1543 case 16:
|
|
|
1544 case 15:
|
|
|
1545 i -= 8;
|
|
|
1546 addr_nop_8();
|
|
|
1547 break;
|
|
|
1548 case 14:
|
|
|
1549 case 13:
|
|
|
1550 i -= 7;
|
|
|
1551 addr_nop_7();
|
|
|
1552 break;
|
|
|
1553 case 12:
|
|
|
1554 i -= 6;
|
|
|
1555 emit_byte(0x66); // size prefix
|
|
|
1556 addr_nop_5();
|
|
|
1557 break;
|
|
|
1558 default:
|
|
|
1559 assert(i < 12, " ");
|
|
|
1560 }
|
|
|
1561
|
|
|
1562 // Generate second nop for size between 11-1
|
|
|
1563 switch (i) {
|
|
|
1564 case 11:
|
|
|
1565 emit_byte(0x66); // size prefix
|
|
|
1566 case 10:
|
|
|
1567 emit_byte(0x66); // size prefix
|
|
|
1568 case 9:
|
|
|
1569 emit_byte(0x66); // size prefix
|
|
|
1570 case 8:
|
|
|
1571 addr_nop_8();
|
|
|
1572 break;
|
|
|
1573 case 7:
|
|
|
1574 addr_nop_7();
|
|
|
1575 break;
|
|
|
1576 case 6:
|
|
|
1577 emit_byte(0x66); // size prefix
|
|
|
1578 case 5:
|
|
|
1579 addr_nop_5();
|
|
|
1580 break;
|
|
|
1581 case 4:
|
|
|
1582 addr_nop_4();
|
|
|
1583 break;
|
|
|
1584 case 3:
|
|
|
1585 // Don't use "0x0F 0x1F 0x00" - need patching safe padding
|
|
|
1586 emit_byte(0x66); // size prefix
|
|
|
1587 case 2:
|
|
|
1588 emit_byte(0x66); // size prefix
|
|
|
1589 case 1:
|
|
|
1590 emit_byte(0x90); // nop
|
|
|
1591 break;
|
|
|
1592 default:
|
|
|
1593 assert(i == 0, " ");
|
|
|
1594 }
|
|
|
1595 return;
|
|
|
1596 }
|
|
|
1597
|
|
|
1598 // Using nops with size prefixes "0x66 0x90".
|
|
|
1599 // From AMD Optimization Guide:
|
|
|
1600 // 1: 0x90
|
|
|
1601 // 2: 0x66 0x90
|
|
|
1602 // 3: 0x66 0x66 0x90
|
|
|
1603 // 4: 0x66 0x66 0x66 0x90
|
|
|
1604 // 5: 0x66 0x66 0x90 0x66 0x90
|
|
|
1605 // 6: 0x66 0x66 0x90 0x66 0x66 0x90
|
|
|
1606 // 7: 0x66 0x66 0x66 0x90 0x66 0x66 0x90
|
|
|
1607 // 8: 0x66 0x66 0x66 0x90 0x66 0x66 0x66 0x90
|
|
|
1608 // 9: 0x66 0x66 0x90 0x66 0x66 0x90 0x66 0x66 0x90
|
|
|
1609 // 10: 0x66 0x66 0x66 0x90 0x66 0x66 0x90 0x66 0x66 0x90
|
|
|
1610 //
|
|
|
1611 while(i > 12) {
|
|
|
1612 i -= 4;
|
|
|
1613 emit_byte(0x66); // size prefix
|
|
|
1614 emit_byte(0x66);
|
|
|
1615 emit_byte(0x66);
|
|
|
1616 emit_byte(0x90); // nop
|
|
|
1617 }
|
|
|
1618 // 1 - 12 nops
|
|
|
1619 if(i > 8) {
|
|
|
1620 if(i > 9) {
|
|
|
1621 i -= 1;
|
|
|
1622 emit_byte(0x66);
|
|
|
1623 }
|
|
|
1624 i -= 3;
|
|
|
1625 emit_byte(0x66);
|
|
|
1626 emit_byte(0x66);
|
|
|
1627 emit_byte(0x90);
|
|
|
1628 }
|
|
|
1629 // 1 - 8 nops
|
|
|
1630 if(i > 4) {
|
|
|
1631 if(i > 6) {
|
|
|
1632 i -= 1;
|
|
|
1633 emit_byte(0x66);
|
|
|
1634 }
|
|
|
1635 i -= 3;
|
|
|
1636 emit_byte(0x66);
|
|
|
1637 emit_byte(0x66);
|
|
|
1638 emit_byte(0x90);
|
|
|
1639 }
|
|
|
1640 switch (i) {
|
|
|
1641 case 4:
|
|
|
1642 emit_byte(0x66);
|
|
|
1643 case 3:
|
|
|
1644 emit_byte(0x66);
|
|
|
1645 case 2:
|
|
|
1646 emit_byte(0x66);
|
|
|
1647 case 1:
|
|
|
1648 emit_byte(0x90);
|
|
|
1649 break;
|
|
|
1650 default:
|
|
|
1651 assert(i == 0, " ");
|
|
|
1652 }
|
|
|
1653 }
|
|
|
1654
|
|
|
1655 void Assembler::ret(int imm16) {
|
|
|
1656 if (imm16 == 0) {
|
|
|
1657 emit_byte(0xC3);
|
|
|
1658 } else {
|
|
|
1659 emit_byte(0xC2);
|
|
|
1660 emit_word(imm16);
|
|
|
1661 }
|
|
|
1662 }
|
|
|
1663
|
|
|
1664
|
|
|
1665 void Assembler::set_byte_if_not_zero(Register dst) {
|
|
|
1666 emit_byte(0x0F);
|
|
|
1667 emit_byte(0x95);
|
|
|
1668 emit_byte(0xE0 | dst->encoding());
|
|
|
1669 }
|
|
|
1670
|
|
|
1671
|
|
|
1672 // copies a single word from [esi] to [edi]
|
|
|
1673 void Assembler::smovl() {
|
|
|
1674 emit_byte(0xA5);
|
|
|
1675 }
|
|
|
1676
|
|
|
1677 // copies data from [esi] to [edi] using rcx double words (m32)
|
|
|
1678 void Assembler::rep_movl() {
|
|
|
1679 emit_byte(0xF3);
|
|
|
1680 emit_byte(0xA5);
|
|
|
1681 }
|
|
|
1682
|
|
|
1683
|
|
|
1684 // sets rcx double words (m32) with rax, value at [edi]
|
|
|
1685 void Assembler::rep_set() {
|
|
|
1686 emit_byte(0xF3);
|
|
|
1687 emit_byte(0xAB);
|
|
|
1688 }
|
|
|
1689
|
|
|
1690 // scans rcx double words (m32) at [edi] for occurance of rax,
|
|
|
1691 void Assembler::repne_scan() {
|
|
|
1692 emit_byte(0xF2);
|
|
|
1693 emit_byte(0xAF);
|
|
|
1694 }
|
|
|
1695
|
|
|
1696
|
|
|
1697 void Assembler::setb(Condition cc, Register dst) {
|
|
|
1698 assert(0 <= cc && cc < 16, "illegal cc");
|
|
|
1699 emit_byte(0x0F);
|
|
|
1700 emit_byte(0x90 | cc);
|
|
|
1701 emit_byte(0xC0 | dst->encoding());
|
|
|
1702 }
|
|
|
1703
|
|
|
1704 void Assembler::cld() {
|
|
|
1705 emit_byte(0xfc);
|
|
|
1706 }
|
|
|
1707
|
|
|
1708 void Assembler::std() {
|
|
|
1709 emit_byte(0xfd);
|
|
|
1710 }
|
|
|
1711
|
|
|
1712 void Assembler::emit_raw (unsigned char b) {
|
|
|
1713 emit_byte (b) ;
|
|
|
1714 }
|
|
|
1715
|
|
|
1716 // Serializes memory.
|
|
|
1717 void Assembler::membar() {
|
|
|
1718 // Memory barriers are only needed on multiprocessors
|
|
|
1719 if (os::is_MP()) {
|
|
|
1720 if( VM_Version::supports_sse2() ) {
|
|
|
1721 emit_byte( 0x0F ); // MFENCE; faster blows no regs
|
|
|
1722 emit_byte( 0xAE );
|
|
|
1723 emit_byte( 0xF0 );
|
|
|
1724 } else {
|
|
|
1725 // All usable chips support "locked" instructions which suffice
|
|
|
1726 // as barriers, and are much faster than the alternative of
|
|
|
1727 // using cpuid instruction. We use here a locked add [esp],0.
|
|
|
1728 // This is conveniently otherwise a no-op except for blowing
|
|
|
1729 // flags (which we save and restore.)
|
|
|
1730 pushfd(); // Save eflags register
|
|
|
1731 lock();
|
|
|
1732 addl(Address(rsp, 0), 0);// Assert the lock# signal here
|
|
|
1733 popfd(); // Restore eflags register
|
|
|
1734 }
|
|
|
1735 }
|
|
|
1736 }
|
|
|
1737
|
|
|
1738 // Identify processor type and features
|
|
|
1739 void Assembler::cpuid() {
|
|
|
1740 // Note: we can't assert VM_Version::supports_cpuid() here
|
|
|
1741 // because this instruction is used in the processor
|
|
|
1742 // identification code.
|
|
|
1743 emit_byte( 0x0F );
|
|
|
1744 emit_byte( 0xA2 );
|
|
|
1745 }
|
|
|
1746
|
|
|
1747 void Assembler::call(Label& L, relocInfo::relocType rtype) {
|
|
|
1748 if (L.is_bound()) {
|
|
|
1749 const int long_size = 5;
|
|
|
1750 int offs = target(L) - pc();
|
|
|
1751 assert(offs <= 0, "assembler error");
|
|
|
1752 InstructionMark im(this);
|
|
|
1753 // 1110 1000 #32-bit disp
|
|
|
1754 emit_byte(0xE8);
|
|
|
1755 emit_data(offs - long_size, rtype, 0);
|
|
|
1756 } else {
|
|
|
1757 InstructionMark im(this);
|
|
|
1758 // 1110 1000 #32-bit disp
|
|
|
1759 L.add_patch_at(code(), locator());
|
|
|
1760 emit_byte(0xE8);
|
|
|
1761 emit_data(int(0), rtype, 0);
|
|
|
1762 }
|
|
|
1763 }
|
|
|
1764
|
|
|
1765 void Assembler::call(Register dst) {
|
|
|
1766 emit_byte(0xFF);
|
|
|
1767 emit_byte(0xD0 | dst->encoding());
|
|
|
1768 }
|
|
|
1769
|
|
|
1770
|
|
|
1771 void Assembler::call(Address adr) {
|
|
|
1772 InstructionMark im(this);
|
|
|
1773 relocInfo::relocType rtype = adr.reloc();
|
|
|
1774 if (rtype != relocInfo::runtime_call_type) {
|
|
|
1775 emit_byte(0xFF);
|
|
|
1776 emit_operand(rdx, adr);
|
|
|
1777 } else {
|
|
|
1778 assert(false, "ack");
|
|
|
1779 }
|
|
|
1780
|
|
|
1781 }
|
|
|
1782
|
|
|
1783 void Assembler::call_literal(address dest, RelocationHolder const& rspec) {
|
|
|
1784 InstructionMark im(this);
|
|
|
1785 emit_byte(0xE8);
|
|
|
1786 intptr_t disp = dest - (_code_pos + sizeof(int32_t));
|
|
|
1787 assert(dest != NULL, "must have a target");
|
|
|
1788 emit_data(disp, rspec, call32_operand);
|
|
|
1789
|
|
|
1790 }
|
|
|
1791
|
|
|
1792 void Assembler::jmp(Register entry) {
|
|
|
1793 emit_byte(0xFF);
|
|
|
1794 emit_byte(0xE0 | entry->encoding());
|
|
|
1795 }
|
|
|
1796
|
|
|
1797
|
|
|
1798 void Assembler::jmp(Address adr) {
|
|
|
1799 InstructionMark im(this);
|
|
|
1800 emit_byte(0xFF);
|
|
|
1801 emit_operand(rsp, adr);
|
|
|
1802 }
|
|
|
1803
|
|
|
1804 void Assembler::jmp_literal(address dest, RelocationHolder const& rspec) {
|
|
|
1805 InstructionMark im(this);
|
|
|
1806 emit_byte(0xE9);
|
|
|
1807 assert(dest != NULL, "must have a target");
|
|
|
1808 intptr_t disp = dest - (_code_pos + sizeof(int32_t));
|
|
|
1809 emit_data(disp, rspec.reloc(), call32_operand);
|
|
|
1810 }
|
|
|
1811
|
|
|
1812 void Assembler::jmp(Label& L, relocInfo::relocType rtype) {
|
|
|
1813 if (L.is_bound()) {
|
|
|
1814 address entry = target(L);
|
|
|
1815 assert(entry != NULL, "jmp most probably wrong");
|
|
|
1816 InstructionMark im(this);
|
|
|
1817 const int short_size = 2;
|
|
|
1818 const int long_size = 5;
|
|
|
1819 intptr_t offs = entry - _code_pos;
|
|
|
1820 if (rtype == relocInfo::none && is8bit(offs - short_size)) {
|
|
|
1821 emit_byte(0xEB);
|
|
|
1822 emit_byte((offs - short_size) & 0xFF);
|
|
|
1823 } else {
|
|
|
1824 emit_byte(0xE9);
|
|
|
1825 emit_long(offs - long_size);
|
|
|
1826 }
|
|
|
1827 } else {
|
|
|
1828 // By default, forward jumps are always 32-bit displacements, since
|
|
|
1829 // we can't yet know where the label will be bound. If you're sure that
|
|
|
1830 // the forward jump will not run beyond 256 bytes, use jmpb to
|
|
|
1831 // force an 8-bit displacement.
|
|
|
1832 InstructionMark im(this);
|
|
|
1833 relocate(rtype);
|
|
|
1834 L.add_patch_at(code(), locator());
|
|
|
1835 emit_byte(0xE9);
|
|
|
1836 emit_long(0);
|
|
|
1837 }
|
|
|
1838 }
|
|
|
1839
|
|
|
1840 void Assembler::jmpb(Label& L) {
|
|
|
1841 if (L.is_bound()) {
|
|
|
1842 const int short_size = 2;
|
|
|
1843 address entry = target(L);
|
|
|
1844 assert(is8bit((entry - _code_pos) + short_size),
|
|
|
1845 "Dispacement too large for a short jmp");
|
|
|
1846 assert(entry != NULL, "jmp most probably wrong");
|
|
|
1847 intptr_t offs = entry - _code_pos;
|
|
|
1848 emit_byte(0xEB);
|
|
|
1849 emit_byte((offs - short_size) & 0xFF);
|
|
|
1850 } else {
|
|
|
1851 InstructionMark im(this);
|
|
|
1852 L.add_patch_at(code(), locator());
|
|
|
1853 emit_byte(0xEB);
|
|
|
1854 emit_byte(0);
|
|
|
1855 }
|
|
|
1856 }
|
|
|
1857
|
|
|
1858 void Assembler::jcc(Condition cc, Label& L, relocInfo::relocType rtype) {
|
|
|
1859 InstructionMark im(this);
|
|
|
1860 relocate(rtype);
|
|
|
1861 assert((0 <= cc) && (cc < 16), "illegal cc");
|
|
|
1862 if (L.is_bound()) {
|
|
|
1863 address dst = target(L);
|
|
|
1864 assert(dst != NULL, "jcc most probably wrong");
|
|
|
1865
|
|
|
1866 const int short_size = 2;
|
|
|
1867 const int long_size = 6;
|
|
|
1868 int offs = (int)dst - ((int)_code_pos);
|
|
|
1869 if (rtype == relocInfo::none && is8bit(offs - short_size)) {
|
|
|
1870 // 0111 tttn #8-bit disp
|
|
|
1871 emit_byte(0x70 | cc);
|
|
|
1872 emit_byte((offs - short_size) & 0xFF);
|
|
|
1873 } else {
|
|
|
1874 // 0000 1111 1000 tttn #32-bit disp
|
|
|
1875 emit_byte(0x0F);
|
|
|
1876 emit_byte(0x80 | cc);
|
|
|
1877 emit_long(offs - long_size);
|
|
|
1878 }
|
|
|
1879 } else {
|
|
|
1880 // Note: could eliminate cond. jumps to this jump if condition
|
|
|
1881 // is the same however, seems to be rather unlikely case.
|
|
|
1882 // Note: use jccb() if label to be bound is very close to get
|
|
|
1883 // an 8-bit displacement
|
|
|
1884 L.add_patch_at(code(), locator());
|
|
|
1885 emit_byte(0x0F);
|
|
|
1886 emit_byte(0x80 | cc);
|
|
|
1887 emit_long(0);
|
|
|
1888 }
|
|
|
1889 }
|
|
|
1890
|
|
|
1891 void Assembler::jccb(Condition cc, Label& L) {
|
|
|
1892 if (L.is_bound()) {
|
|
|
1893 const int short_size = 2;
|
|
|
1894 address entry = target(L);
|
|
|
1895 assert(is8bit((intptr_t)entry - ((intptr_t)_code_pos + short_size)),
|
|
|
1896 "Dispacement too large for a short jmp");
|
|
|
1897 intptr_t offs = (intptr_t)entry - (intptr_t)_code_pos;
|
|
|
1898 // 0111 tttn #8-bit disp
|
|
|
1899 emit_byte(0x70 | cc);
|
|
|
1900 emit_byte((offs - short_size) & 0xFF);
|
|
|
1901 jcc(cc, L);
|
|
|
1902 } else {
|
|
|
1903 InstructionMark im(this);
|
|
|
1904 L.add_patch_at(code(), locator());
|
|
|
1905 emit_byte(0x70 | cc);
|
|
|
1906 emit_byte(0);
|
|
|
1907 }
|
|
|
1908 }
|
|
|
1909
|
|
|
1910 // FPU instructions
|
|
|
1911
|
|
|
1912 void Assembler::fld1() {
|
|
|
1913 emit_byte(0xD9);
|
|
|
1914 emit_byte(0xE8);
|
|
|
1915 }
|
|
|
1916
|
|
|
1917
|
|
|
1918 void Assembler::fldz() {
|
|
|
1919 emit_byte(0xD9);
|
|
|
1920 emit_byte(0xEE);
|
|
|
1921 }
|
|
|
1922
|
|
|
1923
|
|
|
1924 void Assembler::fld_s(Address adr) {
|
|
|
1925 InstructionMark im(this);
|
|
|
1926 emit_byte(0xD9);
|
|
|
1927 emit_operand(rax, adr);
|
|
|
1928 }
|
|
|
1929
|
|
|
1930
|
|
|
1931 void Assembler::fld_s (int index) {
|
|
|
1932 emit_farith(0xD9, 0xC0, index);
|
|
|
1933 }
|
|
|
1934
|
|
|
1935
|
|
|
1936 void Assembler::fld_d(Address adr) {
|
|
|
1937 InstructionMark im(this);
|
|
|
1938 emit_byte(0xDD);
|
|
|
1939 emit_operand(rax, adr);
|
|
|
1940 }
|
|
|
1941
|
|
|
1942
|
|
|
1943 void Assembler::fld_x(Address adr) {
|
|
|
1944 InstructionMark im(this);
|
|
|
1945 emit_byte(0xDB);
|
|
|
1946 emit_operand(rbp, adr);
|
|
|
1947 }
|
|
|
1948
|
|
|
1949
|
|
|
1950 void Assembler::fst_s(Address adr) {
|
|
|
1951 InstructionMark im(this);
|
|
|
1952 emit_byte(0xD9);
|
|
|
1953 emit_operand(rdx, adr);
|
|
|
1954 }
|
|
|
1955
|
|
|
1956
|
|
|
1957 void Assembler::fst_d(Address adr) {
|
|
|
1958 InstructionMark im(this);
|
|
|
1959 emit_byte(0xDD);
|
|
|
1960 emit_operand(rdx, adr);
|
|
|
1961 }
|
|
|
1962
|
|
|
1963
|
|
|
1964 void Assembler::fstp_s(Address adr) {
|
|
|
1965 InstructionMark im(this);
|
|
|
1966 emit_byte(0xD9);
|
|
|
1967 emit_operand(rbx, adr);
|
|
|
1968 }
|
|
|
1969
|
|
|
1970
|
|
|
1971 void Assembler::fstp_d(Address adr) {
|
|
|
1972 InstructionMark im(this);
|
|
|
1973 emit_byte(0xDD);
|
|
|
1974 emit_operand(rbx, adr);
|
|
|
1975 }
|
|
|
1976
|
|
|
1977
|
|
|
1978 void Assembler::fstp_x(Address adr) {
|
|
|
1979 InstructionMark im(this);
|
|
|
1980 emit_byte(0xDB);
|
|
|
1981 emit_operand(rdi, adr);
|
|
|
1982 }
|
|
|
1983
|
|
|
1984
|
|
|
1985 void Assembler::fstp_d(int index) {
|
|
|
1986 emit_farith(0xDD, 0xD8, index);
|
|
|
1987 }
|
|
|
1988
|
|
|
1989
|
|
|
1990 void Assembler::fild_s(Address adr) {
|
|
|
1991 InstructionMark im(this);
|
|
|
1992 emit_byte(0xDB);
|
|
|
1993 emit_operand(rax, adr);
|
|
|
1994 }
|
|
|
1995
|
|
|
1996
|
|
|
1997 void Assembler::fild_d(Address adr) {
|
|
|
1998 InstructionMark im(this);
|
|
|
1999 emit_byte(0xDF);
|
|
|
2000 emit_operand(rbp, adr);
|
|
|
2001 }
|
|
|
2002
|
|
|
2003
|
|
|
2004 void Assembler::fistp_s(Address adr) {
|
|
|
2005 InstructionMark im(this);
|
|
|
2006 emit_byte(0xDB);
|
|
|
2007 emit_operand(rbx, adr);
|
|
|
2008 }
|
|
|
2009
|
|
|
2010
|
|
|
2011 void Assembler::fistp_d(Address adr) {
|
|
|
2012 InstructionMark im(this);
|
|
|
2013 emit_byte(0xDF);
|
|
|
2014 emit_operand(rdi, adr);
|
|
|
2015 }
|
|
|
2016
|
|
|
2017
|
|
|
2018 void Assembler::fist_s(Address adr) {
|
|
|
2019 InstructionMark im(this);
|
|
|
2020 emit_byte(0xDB);
|
|
|
2021 emit_operand(rdx, adr);
|
|
|
2022 }
|
|
|
2023
|
|
|
2024
|
|
|
2025 void Assembler::fabs() {
|
|
|
2026 emit_byte(0xD9);
|
|
|
2027 emit_byte(0xE1);
|
|
|
2028 }
|
|
|
2029
|
|
|
2030
|
|
|
2031 void Assembler::fldln2() {
|
|
|
2032 emit_byte(0xD9);
|
|
|
2033 emit_byte(0xED);
|
|
|
2034 }
|
|
|
2035
|
|
|
2036 void Assembler::fyl2x() {
|
|
|
2037 emit_byte(0xD9);
|
|
|
2038 emit_byte(0xF1);
|
|
|
2039 }
|
|
|
2040
|
|
|
2041
|
|
|
2042 void Assembler::fldlg2() {
|
|
|
2043 emit_byte(0xD9);
|
|
|
2044 emit_byte(0xEC);
|
|
|
2045 }
|
|
|
2046
|
|
|
2047
|
|
|
2048 void Assembler::flog() {
|
|
|
2049 fldln2();
|
|
|
2050 fxch();
|
|
|
2051 fyl2x();
|
|
|
2052 }
|
|
|
2053
|
|
|
2054
|
|
|
2055 void Assembler::flog10() {
|
|
|
2056 fldlg2();
|
|
|
2057 fxch();
|
|
|
2058 fyl2x();
|
|
|
2059 }
|
|
|
2060
|
|
|
2061
|
|
|
2062 void Assembler::fsin() {
|
|
|
2063 emit_byte(0xD9);
|
|
|
2064 emit_byte(0xFE);
|
|
|
2065 }
|
|
|
2066
|
|
|
2067
|
|
|
2068 void Assembler::fcos() {
|
|
|
2069 emit_byte(0xD9);
|
|
|
2070 emit_byte(0xFF);
|
|
|
2071 }
|
|
|
2072
|
|
|
2073 void Assembler::ftan() {
|
|
|
2074 emit_byte(0xD9);
|
|
|
2075 emit_byte(0xF2);
|
|
|
2076 emit_byte(0xDD);
|
|
|
2077 emit_byte(0xD8);
|
|
|
2078 }
|
|
|
2079
|
|
|
2080 void Assembler::fsqrt() {
|
|
|
2081 emit_byte(0xD9);
|
|
|
2082 emit_byte(0xFA);
|
|
|
2083 }
|
|
|
2084
|
|
|
2085
|
|
|
2086 void Assembler::fchs() {
|
|
|
2087 emit_byte(0xD9);
|
|
|
2088 emit_byte(0xE0);
|
|
|
2089 }
|
|
|
2090
|
|
|
2091
|
|
|
2092 void Assembler::fadd_s(Address src) {
|
|
|
2093 InstructionMark im(this);
|
|
|
2094 emit_byte(0xD8);
|
|
|
2095 emit_operand(rax, src);
|
|
|
2096 }
|
|
|
2097
|
|
|
2098
|
|
|
2099 void Assembler::fadd_d(Address src) {
|
|
|
2100 InstructionMark im(this);
|
|
|
2101 emit_byte(0xDC);
|
|
|
2102 emit_operand(rax, src);
|
|
|
2103 }
|
|
|
2104
|
|
|
2105
|
|
|
2106 void Assembler::fadd(int i) {
|
|
|
2107 emit_farith(0xD8, 0xC0, i);
|
|
|
2108 }
|
|
|
2109
|
|
|
2110
|
|
|
2111 void Assembler::fadda(int i) {
|
|
|
2112 emit_farith(0xDC, 0xC0, i);
|
|
|
2113 }
|
|
|
2114
|
|
|
2115
|
|
|
2116 void Assembler::fsub_d(Address src) {
|
|
|
2117 InstructionMark im(this);
|
|
|
2118 emit_byte(0xDC);
|
|
|
2119 emit_operand(rsp, src);
|
|
|
2120 }
|
|
|
2121
|
|
|
2122
|
|
|
2123 void Assembler::fsub_s(Address src) {
|
|
|
2124 InstructionMark im(this);
|
|
|
2125 emit_byte(0xD8);
|
|
|
2126 emit_operand(rsp, src);
|
|
|
2127 }
|
|
|
2128
|
|
|
2129
|
|
|
2130 void Assembler::fsubr_s(Address src) {
|
|
|
2131 InstructionMark im(this);
|
|
|
2132 emit_byte(0xD8);
|
|
|
2133 emit_operand(rbp, src);
|
|
|
2134 }
|
|
|
2135
|
|
|
2136
|
|
|
2137 void Assembler::fsubr_d(Address src) {
|
|
|
2138 InstructionMark im(this);
|
|
|
2139 emit_byte(0xDC);
|
|
|
2140 emit_operand(rbp, src);
|
|
|
2141 }
|
|
|
2142
|
|
|
2143
|
|
|
2144 void Assembler::fmul_s(Address src) {
|
|
|
2145 InstructionMark im(this);
|
|
|
2146 emit_byte(0xD8);
|
|
|
2147 emit_operand(rcx, src);
|
|
|
2148 }
|
|
|
2149
|
|
|
2150
|
|
|
2151 void Assembler::fmul_d(Address src) {
|
|
|
2152 InstructionMark im(this);
|
|
|
2153 emit_byte(0xDC);
|
|
|
2154 emit_operand(rcx, src);
|
|
|
2155 }
|
|
|
2156
|
|
|
2157
|
|
|
2158 void Assembler::fmul(int i) {
|
|
|
2159 emit_farith(0xD8, 0xC8, i);
|
|
|
2160 }
|
|
|
2161
|
|
|
2162
|
|
|
2163 void Assembler::fmula(int i) {
|
|
|
2164 emit_farith(0xDC, 0xC8, i);
|
|
|
2165 }
|
|
|
2166
|
|
|
2167
|
|
|
2168 void Assembler::fdiv_s(Address src) {
|
|
|
2169 InstructionMark im(this);
|
|
|
2170 emit_byte(0xD8);
|
|
|
2171 emit_operand(rsi, src);
|
|
|
2172 }
|
|
|
2173
|
|
|
2174
|
|
|
2175 void Assembler::fdiv_d(Address src) {
|
|
|
2176 InstructionMark im(this);
|
|
|
2177 emit_byte(0xDC);
|
|
|
2178 emit_operand(rsi, src);
|
|
|
2179 }
|
|
|
2180
|
|
|
2181
|
|
|
2182 void Assembler::fdivr_s(Address src) {
|
|
|
2183 InstructionMark im(this);
|
|
|
2184 emit_byte(0xD8);
|
|
|
2185 emit_operand(rdi, src);
|
|
|
2186 }
|
|
|
2187
|
|
|
2188
|
|
|
2189 void Assembler::fdivr_d(Address src) {
|
|
|
2190 InstructionMark im(this);
|
|
|
2191 emit_byte(0xDC);
|
|
|
2192 emit_operand(rdi, src);
|
|
|
2193 }
|
|
|
2194
|
|
|
2195
|
|
|
2196 void Assembler::fsub(int i) {
|
|
|
2197 emit_farith(0xD8, 0xE0, i);
|
|
|
2198 }
|
|
|
2199
|
|
|
2200
|
|
|
2201 void Assembler::fsuba(int i) {
|
|
|
2202 emit_farith(0xDC, 0xE8, i);
|
|
|
2203 }
|
|
|
2204
|
|
|
2205
|
|
|
2206 void Assembler::fsubr(int i) {
|
|
|
2207 emit_farith(0xD8, 0xE8, i);
|
|
|
2208 }
|
|
|
2209
|
|
|
2210
|
|
|
2211 void Assembler::fsubra(int i) {
|
|
|
2212 emit_farith(0xDC, 0xE0, i);
|
|
|
2213 }
|
|
|
2214
|
|
|
2215
|
|
|
2216 void Assembler::fdiv(int i) {
|
|
|
2217 emit_farith(0xD8, 0xF0, i);
|
|
|
2218 }
|
|
|
2219
|
|
|
2220
|
|
|
2221 void Assembler::fdiva(int i) {
|
|
|
2222 emit_farith(0xDC, 0xF8, i);
|
|
|
2223 }
|
|
|
2224
|
|
|
2225
|
|
|
2226 void Assembler::fdivr(int i) {
|
|
|
2227 emit_farith(0xD8, 0xF8, i);
|
|
|
2228 }
|
|
|
2229
|
|
|
2230
|
|
|
2231 void Assembler::fdivra(int i) {
|
|
|
2232 emit_farith(0xDC, 0xF0, i);
|
|
|
2233 }
|
|
|
2234
|
|
|
2235
|
|
|
2236 // Note: The Intel manual (Pentium Processor User's Manual, Vol.3, 1994)
|
|
|
2237 // is erroneous for some of the floating-point instructions below.
|
|
|
2238
|
|
|
2239 void Assembler::fdivp(int i) {
|
|
|
2240 emit_farith(0xDE, 0xF8, i); // ST(0) <- ST(0) / ST(1) and pop (Intel manual wrong)
|
|
|
2241 }
|
|
|
2242
|
|
|
2243
|
|
|
2244 void Assembler::fdivrp(int i) {
|
|
|
2245 emit_farith(0xDE, 0xF0, i); // ST(0) <- ST(1) / ST(0) and pop (Intel manual wrong)
|
|
|
2246 }
|
|
|
2247
|
|
|
2248
|
|
|
2249 void Assembler::fsubp(int i) {
|
|
|
2250 emit_farith(0xDE, 0xE8, i); // ST(0) <- ST(0) - ST(1) and pop (Intel manual wrong)
|
|
|
2251 }
|
|
|
2252
|
|
|
2253
|
|
|
2254 void Assembler::fsubrp(int i) {
|
|
|
2255 emit_farith(0xDE, 0xE0, i); // ST(0) <- ST(1) - ST(0) and pop (Intel manual wrong)
|
|
|
2256 }
|
|
|
2257
|
|
|
2258
|
|
|
2259 void Assembler::faddp(int i) {
|
|
|
2260 emit_farith(0xDE, 0xC0, i);
|
|
|
2261 }
|
|
|
2262
|
|
|
2263
|
|
|
2264 void Assembler::fmulp(int i) {
|
|
|
2265 emit_farith(0xDE, 0xC8, i);
|
|
|
2266 }
|
|
|
2267
|
|
|
2268
|
|
|
2269 void Assembler::fprem() {
|
|
|
2270 emit_byte(0xD9);
|
|
|
2271 emit_byte(0xF8);
|
|
|
2272 }
|
|
|
2273
|
|
|
2274
|
|
|
2275 void Assembler::fprem1() {
|
|
|
2276 emit_byte(0xD9);
|
|
|
2277 emit_byte(0xF5);
|
|
|
2278 }
|
|
|
2279
|
|
|
2280
|
|
|
2281 void Assembler::fxch(int i) {
|
|
|
2282 emit_farith(0xD9, 0xC8, i);
|
|
|
2283 }
|
|
|
2284
|
|
|
2285
|
|
|
2286 void Assembler::fincstp() {
|
|
|
2287 emit_byte(0xD9);
|
|
|
2288 emit_byte(0xF7);
|
|
|
2289 }
|
|
|
2290
|
|
|
2291
|
|
|
2292 void Assembler::fdecstp() {
|
|
|
2293 emit_byte(0xD9);
|
|
|
2294 emit_byte(0xF6);
|
|
|
2295 }
|
|
|
2296
|
|
|
2297
|
|
|
2298 void Assembler::ffree(int i) {
|
|
|
2299 emit_farith(0xDD, 0xC0, i);
|
|
|
2300 }
|
|
|
2301
|
|
|
2302
|
|
|
2303 void Assembler::fcomp_s(Address src) {
|
|
|
2304 InstructionMark im(this);
|
|
|
2305 emit_byte(0xD8);
|
|
|
2306 emit_operand(rbx, src);
|
|
|
2307 }
|
|
|
2308
|
|
|
2309
|
|
|
2310 void Assembler::fcomp_d(Address src) {
|
|
|
2311 InstructionMark im(this);
|
|
|
2312 emit_byte(0xDC);
|
|
|
2313 emit_operand(rbx, src);
|
|
|
2314 }
|
|
|
2315
|
|
|
2316
|
|
|
2317 void Assembler::fcom(int i) {
|
|
|
2318 emit_farith(0xD8, 0xD0, i);
|
|
|
2319 }
|
|
|
2320
|
|
|
2321
|
|
|
2322 void Assembler::fcomp(int i) {
|
|
|
2323 emit_farith(0xD8, 0xD8, i);
|
|
|
2324 }
|
|
|
2325
|
|
|
2326
|
|
|
2327 void Assembler::fcompp() {
|
|
|
2328 emit_byte(0xDE);
|
|
|
2329 emit_byte(0xD9);
|
|
|
2330 }
|
|
|
2331
|
|
|
2332
|
|
|
2333 void Assembler::fucomi(int i) {
|
|
|
2334 // make sure the instruction is supported (introduced for P6, together with cmov)
|
|
|
2335 guarantee(VM_Version::supports_cmov(), "illegal instruction");
|
|
|
2336 emit_farith(0xDB, 0xE8, i);
|
|
|
2337 }
|
|
|
2338
|
|
|
2339
|
|
|
2340 void Assembler::fucomip(int i) {
|
|
|
2341 // make sure the instruction is supported (introduced for P6, together with cmov)
|
|
|
2342 guarantee(VM_Version::supports_cmov(), "illegal instruction");
|
|
|
2343 emit_farith(0xDF, 0xE8, i);
|
|
|
2344 }
|
|
|
2345
|
|
|
2346
|
|
|
2347 void Assembler::ftst() {
|
|
|
2348 emit_byte(0xD9);
|
|
|
2349 emit_byte(0xE4);
|
|
|
2350 }
|
|
|
2351
|
|
|
2352
|
|
|
2353 void Assembler::fnstsw_ax() {
|
|
|
2354 emit_byte(0xdF);
|
|
|
2355 emit_byte(0xE0);
|
|
|
2356 }
|
|
|
2357
|
|
|
2358
|
|
|
2359 void Assembler::fwait() {
|
|
|
2360 emit_byte(0x9B);
|
|
|
2361 }
|
|
|
2362
|
|
|
2363
|
|
|
2364 void Assembler::finit() {
|
|
|
2365 emit_byte(0x9B);
|
|
|
2366 emit_byte(0xDB);
|
|
|
2367 emit_byte(0xE3);
|
|
|
2368 }
|
|
|
2369
|
|
|
2370
|
|
|
2371 void Assembler::fldcw(Address src) {
|
|
|
2372 InstructionMark im(this);
|
|
|
2373 emit_byte(0xd9);
|
|
|
2374 emit_operand(rbp, src);
|
|
|
2375 }
|
|
|
2376
|
|
|
2377
|
|
|
2378 void Assembler::fnstcw(Address src) {
|
|
|
2379 InstructionMark im(this);
|
|
|
2380 emit_byte(0x9B);
|
|
|
2381 emit_byte(0xD9);
|
|
|
2382 emit_operand(rdi, src);
|
|
|
2383 }
|
|
|
2384
|
|
|
2385 void Assembler::fnsave(Address dst) {
|
|
|
2386 InstructionMark im(this);
|
|
|
2387 emit_byte(0xDD);
|
|
|
2388 emit_operand(rsi, dst);
|
|
|
2389 }
|
|
|
2390
|
|
|
2391
|
|
|
2392 void Assembler::frstor(Address src) {
|
|
|
2393 InstructionMark im(this);
|
|
|
2394 emit_byte(0xDD);
|
|
|
2395 emit_operand(rsp, src);
|
|
|
2396 }
|
|
|
2397
|
|
|
2398
|
|
|
2399 void Assembler::fldenv(Address src) {
|
|
|
2400 InstructionMark im(this);
|
|
|
2401 emit_byte(0xD9);
|
|
|
2402 emit_operand(rsp, src);
|
|
|
2403 }
|
|
|
2404
|
|
|
2405
|
|
|
2406 void Assembler::sahf() {
|
|
|
2407 emit_byte(0x9E);
|
|
|
2408 }
|
|
|
2409
|
|
|
2410 // MMX operations
|
|
|
2411 void Assembler::emit_operand(MMXRegister reg, Address adr) {
|
|
|
2412 emit_operand((Register)reg, adr._base, adr._index, adr._scale, adr._disp, adr._rspec);
|
|
|
2413 }
|
|
|
2414
|
|
|
2415 void Assembler::movq( MMXRegister dst, Address src ) {
|
|
|
2416 assert( VM_Version::supports_mmx(), "" );
|
|
|
2417 emit_byte(0x0F);
|
|
|
2418 emit_byte(0x6F);
|
|
|
2419 emit_operand(dst,src);
|
|
|
2420 }
|
|
|
2421
|
|
|
2422 void Assembler::movq( Address dst, MMXRegister src ) {
|
|
|
2423 assert( VM_Version::supports_mmx(), "" );
|
|
|
2424 emit_byte(0x0F);
|
|
|
2425 emit_byte(0x7F);
|
|
|
2426 emit_operand(src,dst);
|
|
|
2427 }
|
|
|
2428
|
|
|
2429 void Assembler::emms() {
|
|
|
2430 emit_byte(0x0F);
|
|
|
2431 emit_byte(0x77);
|
|
|
2432 }
|
|
|
2433
|
|
|
2434
|
|
|
2435
|
|
|
2436
|
|
|
2437 // SSE and SSE2 instructions
|
|
|
2438 inline void Assembler::emit_sse_operand(XMMRegister reg, Address adr) {
|
|
|
2439 assert(((Register)reg)->encoding() == reg->encoding(), "otherwise typecast is invalid");
|
|
|
2440 emit_operand((Register)reg, adr._base, adr._index, adr._scale, adr._disp, adr._rspec);
|
|
|
2441 }
|
|
|
2442 inline void Assembler::emit_sse_operand(Register reg, Address adr) {
|
|
|
2443 emit_operand(reg, adr._base, adr._index, adr._scale, adr._disp, adr._rspec);
|
|
|
2444 }
|
|
|
2445
|
|
|
2446 inline void Assembler::emit_sse_operand(XMMRegister dst, XMMRegister src) {
|
|
|
2447 emit_byte(0xC0 | dst->encoding() << 3 | src->encoding());
|
|
|
2448 }
|
|
|
2449 inline void Assembler::emit_sse_operand(XMMRegister dst, Register src) {
|
|
|
2450 emit_byte(0xC0 | dst->encoding() << 3 | src->encoding());
|
|
|
2451 }
|
|
|
2452 inline void Assembler::emit_sse_operand(Register dst, XMMRegister src) {
|
|
|
2453 emit_byte(0xC0 | dst->encoding() << 3 | src->encoding());
|
|
|
2454 }
|
|
|
2455
|
|
|
2456
|
|
|
2457 // Macro for creation of SSE2 instructions
|
|
|
2458 // The SSE2 instricution set is highly regular, so this macro saves
|
|
|
2459 // a lot of cut&paste
|
|
|
2460 // Each macro expansion creates two methods (same name with different
|
|
|
2461 // parameter list)
|
|
|
2462 //
|
|
|
2463 // Macro parameters:
|
|
|
2464 // * name: name of the created methods
|
|
|
2465 // * sse_version: either sse or sse2 for the assertion if instruction supported by processor
|
|
|
2466 // * prefix: first opcode byte of the instruction (or 0 if no prefix byte)
|
|
|
2467 // * opcode: last opcode byte of the instruction
|
|
|
2468 // * conversion instruction have parameters of type Register instead of XMMRegister,
|
|
|
2469 // so this can also configured with macro parameters
|
|
|
2470 #define emit_sse_instruction(name, sse_version, prefix, opcode, dst_register_type, src_register_type) \
|
|
|
2471 \
|
|
|
2472 void Assembler:: name (dst_register_type dst, Address src) { \
|
|
|
2473 assert(VM_Version::supports_##sse_version(), ""); \
|
|
|
2474 \
|
|
|
2475 InstructionMark im(this); \
|
|
|
2476 if (prefix != 0) emit_byte(prefix); \
|
|
|
2477 emit_byte(0x0F); \
|
|
|
2478 emit_byte(opcode); \
|
|
|
2479 emit_sse_operand(dst, src); \
|
|
|
2480 } \
|
|
|
2481 \
|
|
|
2482 void Assembler:: name (dst_register_type dst, src_register_type src) { \
|
|
|
2483 assert(VM_Version::supports_##sse_version(), ""); \
|
|
|
2484 \
|
|
|
2485 if (prefix != 0) emit_byte(prefix); \
|
|
|
2486 emit_byte(0x0F); \
|
|
|
2487 emit_byte(opcode); \
|
|
|
2488 emit_sse_operand(dst, src); \
|
|
|
2489 } \
|
|
|
2490
|
|
|
2491 emit_sse_instruction(addss, sse, 0xF3, 0x58, XMMRegister, XMMRegister);
|
|
|
2492 emit_sse_instruction(addsd, sse2, 0xF2, 0x58, XMMRegister, XMMRegister)
|
|
|
2493 emit_sse_instruction(subss, sse, 0xF3, 0x5C, XMMRegister, XMMRegister)
|
|
|
2494 emit_sse_instruction(subsd, sse2, 0xF2, 0x5C, XMMRegister, XMMRegister)
|
|
|
2495 emit_sse_instruction(mulss, sse, 0xF3, 0x59, XMMRegister, XMMRegister)
|
|
|
2496 emit_sse_instruction(mulsd, sse2, 0xF2, 0x59, XMMRegister, XMMRegister)
|
|
|
2497 emit_sse_instruction(divss, sse, 0xF3, 0x5E, XMMRegister, XMMRegister)
|
|
|
2498 emit_sse_instruction(divsd, sse2, 0xF2, 0x5E, XMMRegister, XMMRegister)
|
|
|
2499 emit_sse_instruction(sqrtss, sse, 0xF3, 0x51, XMMRegister, XMMRegister)
|
|
|
2500 emit_sse_instruction(sqrtsd, sse2, 0xF2, 0x51, XMMRegister, XMMRegister)
|
|
|
2501
|
|
|
2502 emit_sse_instruction(pxor, sse2, 0x66, 0xEF, XMMRegister, XMMRegister)
|
|
|
2503
|
|
|
2504 emit_sse_instruction(comiss, sse, 0, 0x2F, XMMRegister, XMMRegister)
|
|
|
2505 emit_sse_instruction(comisd, sse2, 0x66, 0x2F, XMMRegister, XMMRegister)
|
|
|
2506 emit_sse_instruction(ucomiss, sse, 0, 0x2E, XMMRegister, XMMRegister)
|
|
|
2507 emit_sse_instruction(ucomisd, sse2, 0x66, 0x2E, XMMRegister, XMMRegister)
|
|
|
2508
|
|
|
2509 emit_sse_instruction(cvtss2sd, sse2, 0xF3, 0x5A, XMMRegister, XMMRegister);
|
|
|
2510 emit_sse_instruction(cvtsd2ss, sse2, 0xF2, 0x5A, XMMRegister, XMMRegister)
|
|
|
2511 emit_sse_instruction(cvtsi2ss, sse, 0xF3, 0x2A, XMMRegister, Register);
|
|
|
2512 emit_sse_instruction(cvtsi2sd, sse2, 0xF2, 0x2A, XMMRegister, Register)
|
|
|
2513 emit_sse_instruction(cvtss2si, sse, 0xF3, 0x2D, Register, XMMRegister);
|
|
|
2514 emit_sse_instruction(cvtsd2si, sse2, 0xF2, 0x2D, Register, XMMRegister)
|
|
|
2515 emit_sse_instruction(cvttss2si, sse, 0xF3, 0x2C, Register, XMMRegister);
|
|
|
2516 emit_sse_instruction(cvttsd2si, sse2, 0xF2, 0x2C, Register, XMMRegister)
|
|
|
2517
|
|
|
2518 emit_sse_instruction(movss, sse, 0xF3, 0x10, XMMRegister, XMMRegister)
|
|
|
2519 emit_sse_instruction(movsd, sse2, 0xF2, 0x10, XMMRegister, XMMRegister)
|
|
|
2520
|
|
|
2521 emit_sse_instruction(movq, sse2, 0xF3, 0x7E, XMMRegister, XMMRegister);
|
|
|
2522 emit_sse_instruction(movd, sse2, 0x66, 0x6E, XMMRegister, Register);
|
|
|
2523 emit_sse_instruction(movdqa, sse2, 0x66, 0x6F, XMMRegister, XMMRegister);
|
|
|
2524
|
|
|
2525 emit_sse_instruction(punpcklbw, sse2, 0x66, 0x60, XMMRegister, XMMRegister);
|
|
|
2526
|
|
|
2527
|
|
|
2528 // Instruction not covered by macro
|
|
|
2529 void Assembler::movq(Address dst, XMMRegister src) {
|
|
|
2530 assert(VM_Version::supports_sse2(), "");
|
|
|
2531
|
|
|
2532 InstructionMark im(this);
|
|
|
2533 emit_byte(0x66);
|
|
|
2534 emit_byte(0x0F);
|
|
|
2535 emit_byte(0xD6);
|
|
|
2536 emit_sse_operand(src, dst);
|
|
|
2537 }
|
|
|
2538
|
|
|
2539 void Assembler::movd(Address dst, XMMRegister src) {
|
|
|
2540 assert(VM_Version::supports_sse2(), "");
|
|
|
2541
|
|
|
2542 InstructionMark im(this);
|
|
|
2543 emit_byte(0x66);
|
|
|
2544 emit_byte(0x0F);
|
|
|
2545 emit_byte(0x7E);
|
|
|
2546 emit_sse_operand(src, dst);
|
|
|
2547 }
|
|
|
2548
|
|
|
2549 void Assembler::movd(Register dst, XMMRegister src) {
|
|
|
2550 assert(VM_Version::supports_sse2(), "");
|
|
|
2551
|
|
|
2552 emit_byte(0x66);
|
|
|
2553 emit_byte(0x0F);
|
|
|
2554 emit_byte(0x7E);
|
|
|
2555 emit_sse_operand(src, dst);
|
|
|
2556 }
|
|
|
2557
|
|
|
2558 void Assembler::movdqa(Address dst, XMMRegister src) {
|
|
|
2559 assert(VM_Version::supports_sse2(), "");
|
|
|
2560
|
|
|
2561 InstructionMark im(this);
|
|
|
2562 emit_byte(0x66);
|
|
|
2563 emit_byte(0x0F);
|
|
|
2564 emit_byte(0x7F);
|
|
|
2565 emit_sse_operand(src, dst);
|
|
|
2566 }
|
|
|
2567
|
|
|
2568 void Assembler::pshufd(XMMRegister dst, XMMRegister src, int mode) {
|
|
|
2569 assert(isByte(mode), "invalid value");
|
|
|
2570 assert(VM_Version::supports_sse2(), "");
|
|
|
2571
|
|
|
2572 emit_byte(0x66);
|
|
|
2573 emit_byte(0x0F);
|
|
|
2574 emit_byte(0x70);
|
|
|
2575 emit_sse_operand(dst, src);
|
|
|
2576 emit_byte(mode & 0xFF);
|
|
|
2577 }
|
|
|
2578
|
|
|
2579 void Assembler::pshufd(XMMRegister dst, Address src, int mode) {
|
|
|
2580 assert(isByte(mode), "invalid value");
|
|
|
2581 assert(VM_Version::supports_sse2(), "");
|
|
|
2582
|
|
|
2583 InstructionMark im(this);
|
|
|
2584 emit_byte(0x66);
|
|
|
2585 emit_byte(0x0F);
|
|
|
2586 emit_byte(0x70);
|
|
|
2587 emit_sse_operand(dst, src);
|
|
|
2588 emit_byte(mode & 0xFF);
|
|
|
2589 }
|
|
|
2590
|
|
|
2591 void Assembler::pshuflw(XMMRegister dst, XMMRegister src, int mode) {
|
|
|
2592 assert(isByte(mode), "invalid value");
|
|
|
2593 assert(VM_Version::supports_sse2(), "");
|
|
|
2594
|
|
|
2595 emit_byte(0xF2);
|
|
|
2596 emit_byte(0x0F);
|
|
|
2597 emit_byte(0x70);
|
|
|
2598 emit_sse_operand(dst, src);
|
|
|
2599 emit_byte(mode & 0xFF);
|
|
|
2600 }
|
|
|
2601
|
|
|
2602 void Assembler::pshuflw(XMMRegister dst, Address src, int mode) {
|
|
|
2603 assert(isByte(mode), "invalid value");
|
|
|
2604 assert(VM_Version::supports_sse2(), "");
|
|
|
2605
|
|
|
2606 InstructionMark im(this);
|
|
|
2607 emit_byte(0xF2);
|
|
|
2608 emit_byte(0x0F);
|
|
|
2609 emit_byte(0x70);
|
|
|
2610 emit_sse_operand(dst, src);
|
|
|
2611 emit_byte(mode & 0xFF);
|
|
|
2612 }
|
|
|
2613
|
|
|
2614 void Assembler::psrlq(XMMRegister dst, int shift) {
|
|
|
2615 assert(VM_Version::supports_sse2(), "");
|
|
|
2616
|
|
|
2617 emit_byte(0x66);
|
|
|
2618 emit_byte(0x0F);
|
|
|
2619 emit_byte(0x73);
|
|
|
2620 emit_sse_operand(xmm2, dst);
|
|
|
2621 emit_byte(shift);
|
|
|
2622 }
|
|
|
2623
|
|
|
2624 void Assembler::movss( Address dst, XMMRegister src ) {
|
|
|
2625 assert(VM_Version::supports_sse(), "");
|
|
|
2626
|
|
|
2627 InstructionMark im(this);
|
|
|
2628 emit_byte(0xF3); // single
|
|
|
2629 emit_byte(0x0F);
|
|
|
2630 emit_byte(0x11); // store
|
|
|
2631 emit_sse_operand(src, dst);
|
|
|
2632 }
|
|
|
2633
|
|
|
2634 void Assembler::movsd( Address dst, XMMRegister src ) {
|
|
|
2635 assert(VM_Version::supports_sse2(), "");
|
|
|
2636
|
|
|
2637 InstructionMark im(this);
|
|
|
2638 emit_byte(0xF2); // double
|
|
|
2639 emit_byte(0x0F);
|
|
|
2640 emit_byte(0x11); // store
|
|
|
2641 emit_sse_operand(src,dst);
|
|
|
2642 }
|
|
|
2643
|
|
|
2644 // New cpus require to use movaps and movapd to avoid partial register stall
|
|
|
2645 // when moving between registers.
|
|
|
2646 void Assembler::movaps(XMMRegister dst, XMMRegister src) {
|
|
|
2647 assert(VM_Version::supports_sse(), "");
|
|
|
2648
|
|
|
2649 emit_byte(0x0F);
|
|
|
2650 emit_byte(0x28);
|
|
|
2651 emit_sse_operand(dst, src);
|
|
|
2652 }
|
|
|
2653 void Assembler::movapd(XMMRegister dst, XMMRegister src) {
|
|
|
2654 assert(VM_Version::supports_sse2(), "");
|
|
|
2655
|
|
|
2656 emit_byte(0x66);
|
|
|
2657 emit_byte(0x0F);
|
|
|
2658 emit_byte(0x28);
|
|
|
2659 emit_sse_operand(dst, src);
|
|
|
2660 }
|
|
|
2661
|
|
|
2662 // New cpus require to use movsd and movss to avoid partial register stall
|
|
|
2663 // when loading from memory. But for old Opteron use movlpd instead of movsd.
|
|
|
2664 // The selection is done in MacroAssembler::movdbl() and movflt().
|
|
|
2665 void Assembler::movlpd(XMMRegister dst, Address src) {
|
|
|
2666 assert(VM_Version::supports_sse(), "");
|
|
|
2667
|
|
|
2668 InstructionMark im(this);
|
|
|
2669 emit_byte(0x66);
|
|
|
2670 emit_byte(0x0F);
|
|
|
2671 emit_byte(0x12);
|
|
|
2672 emit_sse_operand(dst, src);
|
|
|
2673 }
|
|
|
2674
|
|
71
|
2675 void Assembler::cvtdq2pd(XMMRegister dst, XMMRegister src) {
|
|
|
2676 assert(VM_Version::supports_sse2(), "");
|
|
|
2677
|
|
|
2678 emit_byte(0xF3);
|
|
|
2679 emit_byte(0x0F);
|
|
|
2680 emit_byte(0xE6);
|
|
|
2681 emit_sse_operand(dst, src);
|
|
|
2682 }
|
|
|
2683
|
|
|
2684 void Assembler::cvtdq2ps(XMMRegister dst, XMMRegister src) {
|
|
|
2685 assert(VM_Version::supports_sse2(), "");
|
|
|
2686
|
|
|
2687 emit_byte(0x0F);
|
|
|
2688 emit_byte(0x5B);
|
|
|
2689 emit_sse_operand(dst, src);
|
|
|
2690 }
|
|
0
|
2691
|
|
|
2692 emit_sse_instruction(andps, sse, 0, 0x54, XMMRegister, XMMRegister);
|
|
|
2693 emit_sse_instruction(andpd, sse2, 0x66, 0x54, XMMRegister, XMMRegister);
|
|
|
2694 emit_sse_instruction(andnps, sse, 0, 0x55, XMMRegister, XMMRegister);
|
|
|
2695 emit_sse_instruction(andnpd, sse2, 0x66, 0x55, XMMRegister, XMMRegister);
|
|
|
2696 emit_sse_instruction(orps, sse, 0, 0x56, XMMRegister, XMMRegister);
|
|
|
2697 emit_sse_instruction(orpd, sse2, 0x66, 0x56, XMMRegister, XMMRegister);
|
|
|
2698 emit_sse_instruction(xorps, sse, 0, 0x57, XMMRegister, XMMRegister);
|
|
|
2699 emit_sse_instruction(xorpd, sse2, 0x66, 0x57, XMMRegister, XMMRegister);
|
|
|
2700
|
|
|
2701
|
|
|
2702 void Assembler::ldmxcsr( Address src) {
|
|
|
2703 InstructionMark im(this);
|
|
|
2704 emit_byte(0x0F);
|
|
|
2705 emit_byte(0xAE);
|
|
|
2706 emit_operand(rdx /* 2 */, src);
|
|
|
2707 }
|
|
|
2708
|
|
|
2709 void Assembler::stmxcsr( Address dst) {
|
|
|
2710 InstructionMark im(this);
|
|
|
2711 emit_byte(0x0F);
|
|
|
2712 emit_byte(0xAE);
|
|
|
2713 emit_operand(rbx /* 3 */, dst);
|
|
|
2714 }
|
|
|
2715
|
|
|
2716 // Implementation of MacroAssembler
|
|
|
2717
|
|
|
2718 Address MacroAssembler::as_Address(AddressLiteral adr) {
|
|
|
2719 // amd64 always does this as a pc-rel
|
|
|
2720 // we can be absolute or disp based on the instruction type
|
|
|
2721 // jmp/call are displacements others are absolute
|
|
|
2722 assert(!adr.is_lval(), "must be rval");
|
|
|
2723
|
|
|
2724 return Address(adr.target(), adr.rspec());
|
|
|
2725 }
|
|
|
2726
|
|
|
2727 Address MacroAssembler::as_Address(ArrayAddress adr) {
|
|
|
2728 return Address::make_array(adr);
|
|
|
2729 }
|
|
|
2730
|
|
|
2731 void MacroAssembler::fat_nop() {
|
|
|
2732 // A 5 byte nop that is safe for patching (see patch_verified_entry)
|
|
|
2733 emit_byte(0x26); // es:
|
|
|
2734 emit_byte(0x2e); // cs:
|
|
|
2735 emit_byte(0x64); // fs:
|
|
|
2736 emit_byte(0x65); // gs:
|
|
|
2737 emit_byte(0x90);
|
|
|
2738 }
|
|
|
2739
|
|
|
2740 // 32bit can do a case table jump in one instruction but we no longer allow the base
|
|
|
2741 // to be installed in the Address class
|
|
|
2742 void MacroAssembler::jump(ArrayAddress entry) {
|
|
|
2743 jmp(as_Address(entry));
|
|
|
2744 }
|
|
|
2745
|
|
|
2746 void MacroAssembler::jump(AddressLiteral dst) {
|
|
|
2747 jmp_literal(dst.target(), dst.rspec());
|
|
|
2748 }
|
|
|
2749
|
|
|
2750 void MacroAssembler::jump_cc(Condition cc, AddressLiteral dst) {
|
|
|
2751 assert((0 <= cc) && (cc < 16), "illegal cc");
|
|
|
2752
|
|
|
2753 InstructionMark im(this);
|
|
|
2754
|
|
|
2755 relocInfo::relocType rtype = dst.reloc();
|
|
|
2756 relocate(rtype);
|
|
|
2757 const int short_size = 2;
|
|
|
2758 const int long_size = 6;
|
|
|
2759 int offs = (int)dst.target() - ((int)_code_pos);
|
|
|
2760 if (rtype == relocInfo::none && is8bit(offs - short_size)) {
|
|
|
2761 // 0111 tttn #8-bit disp
|
|
|
2762 emit_byte(0x70 | cc);
|
|
|
2763 emit_byte((offs - short_size) & 0xFF);
|
|
|
2764 } else {
|
|
|
2765 // 0000 1111 1000 tttn #32-bit disp
|
|
|
2766 emit_byte(0x0F);
|
|
|
2767 emit_byte(0x80 | cc);
|
|
|
2768 emit_long(offs - long_size);
|
|
|
2769 }
|
|
|
2770 }
|
|
|
2771
|
|
|
2772 // Calls
|
|
|
2773 void MacroAssembler::call(Label& L, relocInfo::relocType rtype) {
|
|
|
2774 Assembler::call(L, rtype);
|
|
|
2775 }
|
|
|
2776
|
|
|
2777 void MacroAssembler::call(Register entry) {
|
|
|
2778 Assembler::call(entry);
|
|
|
2779 }
|
|
|
2780
|
|
|
2781 void MacroAssembler::call(AddressLiteral entry) {
|
|
|
2782 Assembler::call_literal(entry.target(), entry.rspec());
|
|
|
2783 }
|
|
|
2784
|
|
|
2785
|
|
|
2786 void MacroAssembler::cmp8(AddressLiteral src1, int8_t imm) {
|
|
|
2787 Assembler::cmpb(as_Address(src1), imm);
|
|
|
2788 }
|
|
|
2789
|
|
|
2790 void MacroAssembler::cmp32(AddressLiteral src1, int32_t imm) {
|
|
|
2791 Assembler::cmpl(as_Address(src1), imm);
|
|
|
2792 }
|
|
|
2793
|
|
|
2794 void MacroAssembler::cmp32(Register src1, AddressLiteral src2) {
|
|
|
2795 if (src2.is_lval()) {
|
|
|
2796 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec());
|
|
|
2797 } else {
|
|
|
2798 Assembler::cmpl(src1, as_Address(src2));
|
|
|
2799 }
|
|
|
2800 }
|
|
|
2801
|
|
|
2802 void MacroAssembler::cmp32(Register src1, int32_t imm) {
|
|
|
2803 Assembler::cmpl(src1, imm);
|
|
|
2804 }
|
|
|
2805
|
|
|
2806 void MacroAssembler::cmp32(Register src1, Address src2) {
|
|
|
2807 Assembler::cmpl(src1, src2);
|
|
|
2808 }
|
|
|
2809
|
|
|
2810 void MacroAssembler::cmpoop(Address src1, jobject obj) {
|
|
|
2811 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate());
|
|
|
2812 }
|
|
|
2813
|
|
|
2814 void MacroAssembler::cmpoop(Register src1, jobject obj) {
|
|
|
2815 cmp_literal32(src1, (int32_t)obj, oop_Relocation::spec_for_immediate());
|
|
|
2816 }
|
|
|
2817
|
|
|
2818 void MacroAssembler::cmpptr(Register src1, AddressLiteral src2) {
|
|
|
2819 if (src2.is_lval()) {
|
|
|
2820 // compare the effect address of src2 to src1
|
|
|
2821 cmp_literal32(src1, (int32_t)src2.target(), src2.rspec());
|
|
|
2822 } else {
|
|
|
2823 Assembler::cmpl(src1, as_Address(src2));
|
|
|
2824 }
|
|
|
2825 }
|
|
|
2826
|
|
|
2827 void MacroAssembler::cmpptr(Address src1, AddressLiteral src2) {
|
|
|
2828 assert(src2.is_lval(), "not a mem-mem compare");
|
|
|
2829 cmp_literal32(src1, (int32_t) src2.target(), src2.rspec());
|
|
|
2830 }
|
|
|
2831
|
|
|
2832
|
|
|
2833 void MacroAssembler::cmpxchgptr(Register reg, AddressLiteral adr) {
|
|
|
2834 cmpxchg(reg, as_Address(adr));
|
|
|
2835 }
|
|
|
2836
|
|
|
2837 void MacroAssembler::increment(AddressLiteral dst) {
|
|
|
2838 increment(as_Address(dst));
|
|
|
2839 }
|
|
|
2840
|
|
|
2841 void MacroAssembler::increment(ArrayAddress dst) {
|
|
|
2842 increment(as_Address(dst));
|
|
|
2843 }
|
|
|
2844
|
|
|
2845 void MacroAssembler::lea(Register dst, AddressLiteral adr) {
|
|
|
2846 // leal(dst, as_Address(adr));
|
|
|
2847 // see note in movl as to why we musr use a move
|
|
|
2848 mov_literal32(dst, (int32_t) adr.target(), adr.rspec());
|
|
|
2849 }
|
|
|
2850
|
|
|
2851 void MacroAssembler::lea(Address dst, AddressLiteral adr) {
|
|
|
2852 // leal(dst, as_Address(adr));
|
|
|
2853 // see note in movl as to why we musr use a move
|
|
|
2854 mov_literal32(dst, (int32_t) adr.target(), adr.rspec());
|
|
|
2855 }
|
|
|
2856
|
|
|
2857 void MacroAssembler::mov32(AddressLiteral dst, Register src) {
|
|
|
2858 Assembler::movl(as_Address(dst), src);
|
|
|
2859 }
|
|
|
2860
|
|
|
2861 void MacroAssembler::mov32(Register dst, AddressLiteral src) {
|
|
|
2862 Assembler::movl(dst, as_Address(src));
|
|
|
2863 }
|
|
|
2864
|
|
|
2865 void MacroAssembler::movbyte(ArrayAddress dst, int src) {
|
|
|
2866 movb(as_Address(dst), src);
|
|
|
2867 }
|
|
|
2868
|
|
|
2869 void MacroAssembler::movoop(Address dst, jobject obj) {
|
|
|
2870 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate());
|
|
|
2871 }
|
|
|
2872
|
|
|
2873 void MacroAssembler::movoop(Register dst, jobject obj) {
|
|
|
2874 mov_literal32(dst, (int32_t)obj, oop_Relocation::spec_for_immediate());
|
|
|
2875 }
|
|
|
2876
|
|
|
2877 void MacroAssembler::movptr(Register dst, AddressLiteral src) {
|
|
|
2878 if (src.is_lval()) {
|
|
|
2879 // essentially an lea
|
|
|
2880 mov_literal32(dst, (int32_t) src.target(), src.rspec());
|
|
|
2881 } else {
|
|
|
2882 // mov 32bits from an absolute address
|
|
|
2883 movl(dst, as_Address(src));
|
|
|
2884 }
|
|
|
2885 }
|
|
|
2886
|
|
|
2887 void MacroAssembler::movptr(ArrayAddress dst, Register src) {
|
|
|
2888 movl(as_Address(dst), src);
|
|
|
2889 }
|
|
|
2890
|
|
|
2891 void MacroAssembler::movptr(Register dst, ArrayAddress src) {
|
|
|
2892 movl(dst, as_Address(src));
|
|
|
2893 }
|
|
|
2894
|
|
|
2895 void MacroAssembler::movflt(XMMRegister dst, AddressLiteral src) {
|
|
|
2896 movss(dst, as_Address(src));
|
|
|
2897 }
|
|
|
2898
|
|
|
2899 void MacroAssembler::movdbl(XMMRegister dst, AddressLiteral src) {
|
|
|
2900 if (UseXmmLoadAndClearUpper) { movsd (dst, as_Address(src)); return; }
|
|
|
2901 else { movlpd(dst, as_Address(src)); return; }
|
|
|
2902 }
|
|
|
2903
|
|
|
2904 void Assembler::pushoop(jobject obj) {
|
|
|
2905 push_literal32((int32_t)obj, oop_Relocation::spec_for_immediate());
|
|
|
2906 }
|
|
|
2907
|
|
|
2908
|
|
|
2909 void MacroAssembler::pushptr(AddressLiteral src) {
|
|
|
2910 if (src.is_lval()) {
|
|
|
2911 push_literal32((int32_t)src.target(), src.rspec());
|
|
|
2912 } else {
|
|
|
2913 pushl(as_Address(src));
|
|
|
2914 }
|
|
|
2915 }
|
|
|
2916
|
|
|
2917 void MacroAssembler::test32(Register src1, AddressLiteral src2) {
|
|
|
2918 // src2 must be rval
|
|
|
2919 testl(src1, as_Address(src2));
|
|
|
2920 }
|
|
|
2921
|
|
|
2922 // FPU
|
|
|
2923
|
|
|
2924 void MacroAssembler::fld_x(AddressLiteral src) {
|
|
|
2925 Assembler::fld_x(as_Address(src));
|
|
|
2926 }
|
|
|
2927
|
|
|
2928 void MacroAssembler::fld_d(AddressLiteral src) {
|
|
|
2929 fld_d(as_Address(src));
|
|
|
2930 }
|
|
|
2931
|
|
|
2932 void MacroAssembler::fld_s(AddressLiteral src) {
|
|
|
2933 fld_s(as_Address(src));
|
|
|
2934 }
|
|
|
2935
|
|
|
2936 void MacroAssembler::fldcw(AddressLiteral src) {
|
|
|
2937 Assembler::fldcw(as_Address(src));
|
|
|
2938 }
|
|
|
2939
|
|
|
2940 void MacroAssembler::ldmxcsr(AddressLiteral src) {
|
|
|
2941 Assembler::ldmxcsr(as_Address(src));
|
|
|
2942 }
|
|
|
2943
|
|
|
2944 // SSE
|
|
|
2945
|
|
|
2946 void MacroAssembler::andpd(XMMRegister dst, AddressLiteral src) {
|
|
|
2947 andpd(dst, as_Address(src));
|
|
|
2948 }
|
|
|
2949
|
|
|
2950 void MacroAssembler::comisd(XMMRegister dst, AddressLiteral src) {
|
|
|
2951 comisd(dst, as_Address(src));
|
|
|
2952 }
|
|
|
2953
|
|
|
2954 void MacroAssembler::comiss(XMMRegister dst, AddressLiteral src) {
|
|
|
2955 comiss(dst, as_Address(src));
|
|
|
2956 }
|
|
|
2957
|
|
|
2958 void MacroAssembler::movsd(XMMRegister dst, AddressLiteral src) {
|
|
|
2959 movsd(dst, as_Address(src));
|
|
|
2960 }
|
|
|
2961
|
|
|
2962 void MacroAssembler::movss(XMMRegister dst, AddressLiteral src) {
|
|
|
2963 movss(dst, as_Address(src));
|
|
|
2964 }
|
|
|
2965
|
|
|
2966 void MacroAssembler::xorpd(XMMRegister dst, AddressLiteral src) {
|
|
|
2967 xorpd(dst, as_Address(src));
|
|
|
2968 }
|
|
|
2969
|
|
|
2970 void MacroAssembler::xorps(XMMRegister dst, AddressLiteral src) {
|
|
|
2971 xorps(dst, as_Address(src));
|
|
|
2972 }
|
|
|
2973
|
|
|
2974 void MacroAssembler::ucomisd(XMMRegister dst, AddressLiteral src) {
|
|
|
2975 ucomisd(dst, as_Address(src));
|
|
|
2976 }
|
|
|
2977
|
|
|
2978 void MacroAssembler::ucomiss(XMMRegister dst, AddressLiteral src) {
|
|
|
2979 ucomiss(dst, as_Address(src));
|
|
|
2980 }
|
|
|
2981
|
|
|
2982 void MacroAssembler::null_check(Register reg, int offset) {
|
|
|
2983 if (needs_explicit_null_check(offset)) {
|
|
|
2984 // provoke OS NULL exception if reg = NULL by
|
|
|
2985 // accessing M[reg] w/o changing any (non-CC) registers
|
|
|
2986 cmpl(rax, Address(reg, 0));
|
|
|
2987 // Note: should probably use testl(rax, Address(reg, 0));
|
|
|
2988 // may be shorter code (however, this version of
|
|
|
2989 // testl needs to be implemented first)
|
|
|
2990 } else {
|
|
|
2991 // nothing to do, (later) access of M[reg + offset]
|
|
|
2992 // will provoke OS NULL exception if reg = NULL
|
|
|
2993 }
|
|
|
2994 }
|
|
|
2995
|
|
|
2996
|
|
|
2997 int MacroAssembler::load_unsigned_byte(Register dst, Address src) {
|
|
|
2998 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16,
|
|
|
2999 // and "3.9 Partial Register Penalties", p. 22).
|
|
|
3000 int off;
|
|
|
3001 if (VM_Version::is_P6() || src.uses(dst)) {
|
|
|
3002 off = offset();
|
|
|
3003 movzxb(dst, src);
|
|
|
3004 } else {
|
|
|
3005 xorl(dst, dst);
|
|
|
3006 off = offset();
|
|
|
3007 movb(dst, src);
|
|
|
3008 }
|
|
|
3009 return off;
|
|
|
3010 }
|
|
|
3011
|
|
|
3012
|
|
|
3013 int MacroAssembler::load_unsigned_word(Register dst, Address src) {
|
|
|
3014 // According to Intel Doc. AP-526, "Zero-Extension of Short", p.16,
|
|
|
3015 // and "3.9 Partial Register Penalties", p. 22).
|
|
|
3016 int off;
|
|
|
3017 if (VM_Version::is_P6() || src.uses(dst)) {
|
|
|
3018 off = offset();
|
|
|
3019 movzxw(dst, src);
|
|
|
3020 } else {
|
|
|
3021 xorl(dst, dst);
|
|
|
3022 off = offset();
|
|
|
3023 movw(dst, src);
|
|
|
3024 }
|
|
|
3025 return off;
|
|
|
3026 }
|
|
|
3027
|
|
|
3028
|
|
|
3029 int MacroAssembler::load_signed_byte(Register dst, Address src) {
|
|
|
3030 int off;
|
|
|
3031 if (VM_Version::is_P6()) {
|
|
|
3032 off = offset();
|
|
|
3033 movsxb(dst, src);
|
|
|
3034 } else {
|
|
|
3035 off = load_unsigned_byte(dst, src);
|
|
|
3036 shll(dst, 24);
|
|
|
3037 sarl(dst, 24);
|
|
|
3038 }
|
|
|
3039 return off;
|
|
|
3040 }
|
|
|
3041
|
|
|
3042
|
|
|
3043 int MacroAssembler::load_signed_word(Register dst, Address src) {
|
|
|
3044 int off;
|
|
|
3045 if (VM_Version::is_P6()) {
|
|
|
3046 off = offset();
|
|
|
3047 movsxw(dst, src);
|
|
|
3048 } else {
|
|
|
3049 off = load_unsigned_word(dst, src);
|
|
|
3050 shll(dst, 16);
|
|
|
3051 sarl(dst, 16);
|
|
|
3052 }
|
|
|
3053 return off;
|
|
|
3054 }
|
|
|
3055
|
|
|
3056
|
|
|
3057 void MacroAssembler::extend_sign(Register hi, Register lo) {
|
|
|
3058 // According to Intel Doc. AP-526, "Integer Divide", p.18.
|
|
|
3059 if (VM_Version::is_P6() && hi == rdx && lo == rax) {
|
|
|
3060 cdql();
|
|
|
3061 } else {
|
|
|
3062 movl(hi, lo);
|
|
|
3063 sarl(hi, 31);
|
|
|
3064 }
|
|
|
3065 }
|
|
|
3066
|
|
|
3067
|
|
|
3068 void MacroAssembler::increment(Register reg, int value) {
|
|
|
3069 if (value == min_jint) {addl(reg, value); return; }
|
|
|
3070 if (value < 0) { decrement(reg, -value); return; }
|
|
|
3071 if (value == 0) { ; return; }
|
|
|
3072 if (value == 1 && UseIncDec) { incl(reg); return; }
|
|
|
3073 /* else */ { addl(reg, value) ; return; }
|
|
|
3074 }
|
|
|
3075
|
|
|
3076 void MacroAssembler::increment(Address dst, int value) {
|
|
|
3077 if (value == min_jint) {addl(dst, value); return; }
|
|
|
3078 if (value < 0) { decrement(dst, -value); return; }
|
|
|
3079 if (value == 0) { ; return; }
|
|
|
3080 if (value == 1 && UseIncDec) { incl(dst); return; }
|
|
|
3081 /* else */ { addl(dst, value) ; return; }
|
|
|
3082 }
|
|
|
3083
|
|
|
3084 void MacroAssembler::decrement(Register reg, int value) {
|
|
|
3085 if (value == min_jint) {subl(reg, value); return; }
|
|
|
3086 if (value < 0) { increment(reg, -value); return; }
|
|
|
3087 if (value == 0) { ; return; }
|
|
|
3088 if (value == 1 && UseIncDec) { decl(reg); return; }
|
|
|
3089 /* else */ { subl(reg, value) ; return; }
|
|
|
3090 }
|
|
|
3091
|
|
|
3092 void MacroAssembler::decrement(Address dst, int value) {
|
|
|
3093 if (value == min_jint) {subl(dst, value); return; }
|
|
|
3094 if (value < 0) { increment(dst, -value); return; }
|
|
|
3095 if (value == 0) { ; return; }
|
|
|
3096 if (value == 1 && UseIncDec) { decl(dst); return; }
|
|
|
3097 /* else */ { subl(dst, value) ; return; }
|
|
|
3098 }
|
|
|
3099
|
|
|
3100 void MacroAssembler::align(int modulus) {
|
|
|
3101 if (offset() % modulus != 0) nop(modulus - (offset() % modulus));
|
|
|
3102 }
|
|
|
3103
|
|
|
3104
|
|
|
3105 void MacroAssembler::enter() {
|
|
|
3106 pushl(rbp);
|
|
|
3107 movl(rbp, rsp);
|
|
|
3108 }
|
|
|
3109
|
|
|
3110
|
|
|
3111 void MacroAssembler::leave() {
|
|
|
3112 movl(rsp, rbp);
|
|
|
3113 popl(rbp);
|
|
|
3114 }
|
|
|
3115
|
|
|
3116 void MacroAssembler::set_last_Java_frame(Register java_thread,
|
|
|
3117 Register last_java_sp,
|
|
|
3118 Register last_java_fp,
|
|
|
3119 address last_java_pc) {
|
|
|
3120 // determine java_thread register
|
|
|
3121 if (!java_thread->is_valid()) {
|
|
|
3122 java_thread = rdi;
|
|
|
3123 get_thread(java_thread);
|
|
|
3124 }
|
|
|
3125 // determine last_java_sp register
|
|
|
3126 if (!last_java_sp->is_valid()) {
|
|
|
3127 last_java_sp = rsp;
|
|
|
3128 }
|
|
|
3129
|
|
|
3130 // last_java_fp is optional
|
|
|
3131
|
|
|
3132 if (last_java_fp->is_valid()) {
|
|
|
3133 movl(Address(java_thread, JavaThread::last_Java_fp_offset()), last_java_fp);
|
|
|
3134 }
|
|
|
3135
|
|
|
3136 // last_java_pc is optional
|
|
|
3137
|
|
|
3138 if (last_java_pc != NULL) {
|
|
|
3139 lea(Address(java_thread,
|
|
|
3140 JavaThread::frame_anchor_offset() + JavaFrameAnchor::last_Java_pc_offset()),
|
|
|
3141 InternalAddress(last_java_pc));
|
|
|
3142
|
|
|
3143 }
|
|
|
3144 movl(Address(java_thread, JavaThread::last_Java_sp_offset()), last_java_sp);
|
|
|
3145 }
|
|
|
3146
|
|
|
3147 void MacroAssembler::reset_last_Java_frame(Register java_thread, bool clear_fp, bool clear_pc) {
|
|
|
3148 // determine java_thread register
|
|
|
3149 if (!java_thread->is_valid()) {
|
|
|
3150 java_thread = rdi;
|
|
|
3151 get_thread(java_thread);
|
|
|
3152 }
|
|
|
3153 // we must set sp to zero to clear frame
|
|
|
3154 movl(Address(java_thread, JavaThread::last_Java_sp_offset()), 0);
|
|
|
3155 if (clear_fp) {
|
|
|
3156 movl(Address(java_thread, JavaThread::last_Java_fp_offset()), 0);
|
|
|
3157 }
|
|
|
3158
|
|
|
3159 if (clear_pc)
|
|
|
3160 movl(Address(java_thread, JavaThread::last_Java_pc_offset()), 0);
|
|
|
3161
|
|
|
3162 }
|
|
|
3163
|
|
|
3164
|
|
|
3165
|
|
|
3166 // Implementation of call_VM versions
|
|
|
3167
|
|
|
3168 void MacroAssembler::call_VM_leaf_base(
|
|
|
3169 address entry_point,
|
|
|
3170 int number_of_arguments
|
|
|
3171 ) {
|
|
|
3172 call(RuntimeAddress(entry_point));
|
|
|
3173 increment(rsp, number_of_arguments * wordSize);
|
|
|
3174 }
|
|
|
3175
|
|
|
3176
|
|
|
3177 void MacroAssembler::call_VM_base(
|
|
|
3178 Register oop_result,
|
|
|
3179 Register java_thread,
|
|
|
3180 Register last_java_sp,
|
|
|
3181 address entry_point,
|
|
|
3182 int number_of_arguments,
|
|
|
3183 bool check_exceptions
|
|
|
3184 ) {
|
|
|
3185 // determine java_thread register
|
|
|
3186 if (!java_thread->is_valid()) {
|
|
|
3187 java_thread = rdi;
|
|
|
3188 get_thread(java_thread);
|
|
|
3189 }
|
|
|
3190 // determine last_java_sp register
|
|
|
3191 if (!last_java_sp->is_valid()) {
|
|
|
3192 last_java_sp = rsp;
|
|
|
3193 }
|
|
|
3194 // debugging support
|
|
|
3195 assert(number_of_arguments >= 0 , "cannot have negative number of arguments");
|
|
|
3196 assert(java_thread != oop_result , "cannot use the same register for java_thread & oop_result");
|
|
|
3197 assert(java_thread != last_java_sp, "cannot use the same register for java_thread & last_java_sp");
|
|
|
3198 // push java thread (becomes first argument of C function)
|
|
|
3199 pushl(java_thread);
|
|
|
3200 // set last Java frame before call
|
|
|
3201 assert(last_java_sp != rbp, "this code doesn't work for last_java_sp == rbp, which currently can't portably work anyway since C2 doesn't save rbp,");
|
|
|
3202 // Only interpreter should have to set fp
|
|
|
3203 set_last_Java_frame(java_thread, last_java_sp, rbp, NULL);
|
|
|
3204 // do the call
|
|
|
3205 call(RuntimeAddress(entry_point));
|
|
|
3206 // restore the thread (cannot use the pushed argument since arguments
|
|
|
3207 // may be overwritten by C code generated by an optimizing compiler);
|
|
|
3208 // however can use the register value directly if it is callee saved.
|
|
|
3209 if (java_thread == rdi || java_thread == rsi) {
|
|
|
3210 // rdi & rsi are callee saved -> nothing to do
|
|
|
3211 #ifdef ASSERT
|
|
|
3212 guarantee(java_thread != rax, "change this code");
|
|
|
3213 pushl(rax);
|
|
|
3214 { Label L;
|
|
|
3215 get_thread(rax);
|
|
|
3216 cmpl(java_thread, rax);
|
|
|
3217 jcc(Assembler::equal, L);
|
|
|
3218 stop("MacroAssembler::call_VM_base: rdi not callee saved?");
|
|
|
3219 bind(L);
|
|
|
3220 }
|
|
|
3221 popl(rax);
|
|
|
3222 #endif
|
|
|
3223 } else {
|
|
|
3224 get_thread(java_thread);
|
|
|
3225 }
|
|
|
3226 // reset last Java frame
|
|
|
3227 // Only interpreter should have to clear fp
|
|
|
3228 reset_last_Java_frame(java_thread, true, false);
|
|
|
3229 // discard thread and arguments
|
|
|
3230 addl(rsp, (1 + number_of_arguments)*wordSize);
|
|
|
3231
|
|
|
3232 #ifndef CC_INTERP
|
|
|
3233 // C++ interp handles this in the interpreter
|
|
|
3234 check_and_handle_popframe(java_thread);
|
|
|
3235 check_and_handle_earlyret(java_thread);
|
|
|
3236 #endif /* CC_INTERP */
|
|
|
3237
|
|
|
3238 if (check_exceptions) {
|
|
|
3239 // check for pending exceptions (java_thread is set upon return)
|
|
|
3240 cmpl(Address(java_thread, Thread::pending_exception_offset()), NULL_WORD);
|
|
|
3241 jump_cc(Assembler::notEqual,
|
|
|
3242 RuntimeAddress(StubRoutines::forward_exception_entry()));
|
|
|
3243 }
|
|
|
3244
|
|
|
3245 // get oop result if there is one and reset the value in the thread
|
|
|
3246 if (oop_result->is_valid()) {
|
|
|
3247 movl(oop_result, Address(java_thread, JavaThread::vm_result_offset()));
|
|
|
3248 movl(Address(java_thread, JavaThread::vm_result_offset()), NULL_WORD);
|
|
|
3249 verify_oop(oop_result);
|
|
|
3250 }
|
|
|
3251 }
|
|
|
3252
|
|
|
3253
|
|
|
3254 void MacroAssembler::check_and_handle_popframe(Register java_thread) {
|
|
|
3255 }
|
|
|
3256
|
|
|
3257 void MacroAssembler::check_and_handle_earlyret(Register java_thread) {
|
|
|
3258 }
|
|
|
3259
|
|
|
3260 void MacroAssembler::call_VM_helper(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions) {
|
|
|
3261 leal(rax, Address(rsp, (1 + number_of_arguments) * wordSize));
|
|
|
3262 call_VM_base(oop_result, noreg, rax, entry_point, number_of_arguments, check_exceptions);
|
|
|
3263 }
|
|
|
3264
|
|
|
3265
|
|
|
3266 void MacroAssembler::call_VM(Register oop_result, address entry_point, bool check_exceptions) {
|
|
|
3267 Label C, E;
|
|
|
3268 call(C, relocInfo::none);
|
|
|
3269 jmp(E);
|
|
|
3270
|
|
|
3271 bind(C);
|
|
|
3272 call_VM_helper(oop_result, entry_point, 0, check_exceptions);
|
|
|
3273 ret(0);
|
|
|
3274
|
|
|
3275 bind(E);
|
|
|
3276 }
|
|
|
3277
|
|
|
3278
|
|
|
3279 void MacroAssembler::call_VM(Register oop_result, address entry_point, Register arg_1, bool check_exceptions) {
|
|
|
3280 Label C, E;
|
|
|
3281 call(C, relocInfo::none);
|
|
|
3282 jmp(E);
|
|
|
3283
|
|
|
3284 bind(C);
|
|
|
3285 pushl(arg_1);
|
|
|
3286 call_VM_helper(oop_result, entry_point, 1, check_exceptions);
|
|
|
3287 ret(0);
|
|
|
3288
|
|
|
3289 bind(E);
|
|
|
3290 }
|
|
|
3291
|
|
|
3292
|
|
|
3293 void MacroAssembler::call_VM(Register oop_result, address entry_point, Register arg_1, Register arg_2, bool check_exceptions) {
|
|
|
3294 Label C, E;
|
|
|
3295 call(C, relocInfo::none);
|
|
|
3296 jmp(E);
|
|
|
3297
|
|
|
3298 bind(C);
|
|
|
3299 pushl(arg_2);
|
|
|
3300 pushl(arg_1);
|
|
|
3301 call_VM_helper(oop_result, entry_point, 2, check_exceptions);
|
|
|
3302 ret(0);
|
|
|
3303
|
|
|
3304 bind(E);
|
|
|
3305 }
|
|
|
3306
|
|
|
3307
|
|
|
3308 void MacroAssembler::call_VM(Register oop_result, address entry_point, Register arg_1, Register arg_2, Register arg_3, bool check_exceptions) {
|
|
|
3309 Label C, E;
|
|
|
3310 call(C, relocInfo::none);
|
|
|
3311 jmp(E);
|
|
|
3312
|
|
|
3313 bind(C);
|
|
|
3314 pushl(arg_3);
|
|
|
3315 pushl(arg_2);
|
|
|
3316 pushl(arg_1);
|
|
|
3317 call_VM_helper(oop_result, entry_point, 3, check_exceptions);
|
|
|
3318 ret(0);
|
|
|
3319
|
|
|
3320 bind(E);
|
|
|
3321 }
|
|
|
3322
|
|
|
3323
|
|
|
3324 void MacroAssembler::call_VM(Register oop_result, Register last_java_sp, address entry_point, int number_of_arguments, bool check_exceptions) {
|
|
|
3325 call_VM_base(oop_result, noreg, last_java_sp, entry_point, number_of_arguments, check_exceptions);
|
|
|
3326 }
|
|
|
3327
|
|
|
3328
|
|
|
3329 void MacroAssembler::call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, bool check_exceptions) {
|
|
|
3330 pushl(arg_1);
|
|
|
3331 call_VM(oop_result, last_java_sp, entry_point, 1, check_exceptions);
|
|
|
3332 }
|
|
|
3333
|
|
|
3334
|
|
|
3335 void MacroAssembler::call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, Register arg_2, bool check_exceptions) {
|
|
|
3336 pushl(arg_2);
|
|
|
3337 pushl(arg_1);
|
|
|
3338 call_VM(oop_result, last_java_sp, entry_point, 2, check_exceptions);
|
|
|
3339 }
|
|
|
3340
|
|
|
3341
|
|
|
3342 void MacroAssembler::call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, Register arg_2, Register arg_3, bool check_exceptions) {
|
|
|
3343 pushl(arg_3);
|
|
|
3344 pushl(arg_2);
|
|
|
3345 pushl(arg_1);
|
|
|
3346 call_VM(oop_result, last_java_sp, entry_point, 3, check_exceptions);
|
|
|
3347 }
|
|
|
3348
|
|
|
3349
|
|
|
3350 void MacroAssembler::call_VM_leaf(address entry_point, int number_of_arguments) {
|
|
|
3351 call_VM_leaf_base(entry_point, number_of_arguments);
|
|
|
3352 }
|
|
|
3353
|
|
|
3354
|
|
|
3355 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_1) {
|
|
|
3356 pushl(arg_1);
|
|
|
3357 call_VM_leaf(entry_point, 1);
|
|
|
3358 }
|
|
|
3359
|
|
|
3360
|
|
|
3361 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_1, Register arg_2) {
|
|
|
3362 pushl(arg_2);
|
|
|
3363 pushl(arg_1);
|
|
|
3364 call_VM_leaf(entry_point, 2);
|
|
|
3365 }
|
|
|
3366
|
|
|
3367
|
|
|
3368 void MacroAssembler::call_VM_leaf(address entry_point, Register arg_1, Register arg_2, Register arg_3) {
|
|
|
3369 pushl(arg_3);
|
|
|
3370 pushl(arg_2);
|
|
|
3371 pushl(arg_1);
|
|
|
3372 call_VM_leaf(entry_point, 3);
|
|
|
3373 }
|
|
|
3374
|
|
|
3375
|
|
|
3376 // Calls to C land
|
|
|
3377 //
|
|
|
3378 // When entering C land, the rbp, & rsp of the last Java frame have to be recorded
|
|
|
3379 // in the (thread-local) JavaThread object. When leaving C land, the last Java fp
|
|
|
3380 // has to be reset to 0. This is required to allow proper stack traversal.
|
|
|
3381
|
|
|
3382 void MacroAssembler::store_check(Register obj) {
|
|
|
3383 // Does a store check for the oop in register obj. The content of
|
|
|
3384 // register obj is destroyed afterwards.
|
|
|
3385 store_check_part_1(obj);
|
|
|
3386 store_check_part_2(obj);
|
|
|
3387 }
|
|
|
3388
|
|
|
3389
|
|
|
3390 void MacroAssembler::store_check(Register obj, Address dst) {
|
|
|
3391 store_check(obj);
|
|
|
3392 }
|
|
|
3393
|
|
|
3394
|
|
|
3395 // split the store check operation so that other instructions can be scheduled inbetween
|
|
|
3396 void MacroAssembler::store_check_part_1(Register obj) {
|
|
|
3397 BarrierSet* bs = Universe::heap()->barrier_set();
|
|
|
3398 assert(bs->kind() == BarrierSet::CardTableModRef, "Wrong barrier set kind");
|
|
|
3399 shrl(obj, CardTableModRefBS::card_shift);
|
|
|
3400 }
|
|
|
3401
|
|
|
3402
|
|
|
3403 void MacroAssembler::store_check_part_2(Register obj) {
|
|
|
3404 BarrierSet* bs = Universe::heap()->barrier_set();
|
|
|
3405 assert(bs->kind() == BarrierSet::CardTableModRef, "Wrong barrier set kind");
|
|
|
3406 CardTableModRefBS* ct = (CardTableModRefBS*)bs;
|
|
|
3407 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code");
|
|
|
3408 ExternalAddress cardtable((address)ct->byte_map_base);
|
|
|
3409 Address index(noreg, obj, Address::times_1);
|
|
|
3410
|
|
|
3411 movb(as_Address(ArrayAddress(cardtable, index)), 0);
|
|
|
3412 }
|
|
|
3413
|
|
|
3414
|
|
|
3415 void MacroAssembler::c2bool(Register x) {
|
|
|
3416 // implements x == 0 ? 0 : 1
|
|
|
3417 // note: must only look at least-significant byte of x
|
|
|
3418 // since C-style booleans are stored in one byte
|
|
|
3419 // only! (was bug)
|
|
|
3420 andl(x, 0xFF);
|
|
|
3421 setb(Assembler::notZero, x);
|
|
|
3422 }
|
|
|
3423
|
|
|
3424
|
|
|
3425 int MacroAssembler::corrected_idivl(Register reg) {
|
|
|
3426 // Full implementation of Java idiv and irem; checks for
|
|
|
3427 // special case as described in JVM spec., p.243 & p.271.
|
|
|
3428 // The function returns the (pc) offset of the idivl
|
|
|
3429 // instruction - may be needed for implicit exceptions.
|
|
|
3430 //
|
|
|
3431 // normal case special case
|
|
|
3432 //
|
|
|
3433 // input : rax,: dividend min_int
|
|
|
3434 // reg: divisor (may not be rax,/rdx) -1
|
|
|
3435 //
|
|
|
3436 // output: rax,: quotient (= rax, idiv reg) min_int
|
|
|
3437 // rdx: remainder (= rax, irem reg) 0
|
|
|
3438 assert(reg != rax && reg != rdx, "reg cannot be rax, or rdx register");
|
|
|
3439 const int min_int = 0x80000000;
|
|
|
3440 Label normal_case, special_case;
|
|
|
3441
|
|
|
3442 // check for special case
|
|
|
3443 cmpl(rax, min_int);
|
|
|
3444 jcc(Assembler::notEqual, normal_case);
|
|
|
3445 xorl(rdx, rdx); // prepare rdx for possible special case (where remainder = 0)
|
|
|
3446 cmpl(reg, -1);
|
|
|
3447 jcc(Assembler::equal, special_case);
|
|
|
3448
|
|
|
3449 // handle normal case
|
|
|
3450 bind(normal_case);
|
|
|
3451 cdql();
|
|
|
3452 int idivl_offset = offset();
|
|
|
3453 idivl(reg);
|
|
|
3454
|
|
|
3455 // normal and special case exit
|
|
|
3456 bind(special_case);
|
|
|
3457
|
|
|
3458 return idivl_offset;
|
|
|
3459 }
|
|
|
3460
|
|
|
3461
|
|
|
3462 void MacroAssembler::lneg(Register hi, Register lo) {
|
|
|
3463 negl(lo);
|
|
|
3464 adcl(hi, 0);
|
|
|
3465 negl(hi);
|
|
|
3466 }
|
|
|
3467
|
|
|
3468
|
|
|
3469 void MacroAssembler::lmul(int x_rsp_offset, int y_rsp_offset) {
|
|
|
3470 // Multiplication of two Java long values stored on the stack
|
|
|
3471 // as illustrated below. Result is in rdx:rax.
|
|
|
3472 //
|
|
|
3473 // rsp ---> [ ?? ] \ \
|
|
|
3474 // .... | y_rsp_offset |
|
|
|
3475 // [ y_lo ] / (in bytes) | x_rsp_offset
|
|
|
3476 // [ y_hi ] | (in bytes)
|
|
|
3477 // .... |
|
|
|
3478 // [ x_lo ] /
|
|
|
3479 // [ x_hi ]
|
|
|
3480 // ....
|
|
|
3481 //
|
|
|
3482 // Basic idea: lo(result) = lo(x_lo * y_lo)
|
|
|
3483 // hi(result) = hi(x_lo * y_lo) + lo(x_hi * y_lo) + lo(x_lo * y_hi)
|
|
|
3484 Address x_hi(rsp, x_rsp_offset + wordSize); Address x_lo(rsp, x_rsp_offset);
|
|
|
3485 Address y_hi(rsp, y_rsp_offset + wordSize); Address y_lo(rsp, y_rsp_offset);
|
|
|
3486 Label quick;
|
|
|
3487 // load x_hi, y_hi and check if quick
|
|
|
3488 // multiplication is possible
|
|
|
3489 movl(rbx, x_hi);
|
|
|
3490 movl(rcx, y_hi);
|
|
|
3491 movl(rax, rbx);
|
|
|
3492 orl(rbx, rcx); // rbx, = 0 <=> x_hi = 0 and y_hi = 0
|
|
|
3493 jcc(Assembler::zero, quick); // if rbx, = 0 do quick multiply
|
|
|
3494 // do full multiplication
|
|
|
3495 // 1st step
|
|
|
3496 mull(y_lo); // x_hi * y_lo
|
|
|
3497 movl(rbx, rax); // save lo(x_hi * y_lo) in rbx,
|
|
|
3498 // 2nd step
|
|
|
3499 movl(rax, x_lo);
|
|
|
3500 mull(rcx); // x_lo * y_hi
|
|
|
3501 addl(rbx, rax); // add lo(x_lo * y_hi) to rbx,
|
|
|
3502 // 3rd step
|
|
|
3503 bind(quick); // note: rbx, = 0 if quick multiply!
|
|
|
3504 movl(rax, x_lo);
|
|
|
3505 mull(y_lo); // x_lo * y_lo
|
|
|
3506 addl(rdx, rbx); // correct hi(x_lo * y_lo)
|
|
|
3507 }
|
|
|
3508
|
|
|
3509
|
|
|
3510 void MacroAssembler::lshl(Register hi, Register lo) {
|
|
|
3511 // Java shift left long support (semantics as described in JVM spec., p.305)
|
|
|
3512 // (basic idea for shift counts s >= n: x << s == (x << n) << (s - n))
|
|
|
3513 // shift value is in rcx !
|
|
|
3514 assert(hi != rcx, "must not use rcx");
|
|
|
3515 assert(lo != rcx, "must not use rcx");
|
|
|
3516 const Register s = rcx; // shift count
|
|
|
3517 const int n = BitsPerWord;
|
|
|
3518 Label L;
|
|
|
3519 andl(s, 0x3f); // s := s & 0x3f (s < 0x40)
|
|
|
3520 cmpl(s, n); // if (s < n)
|
|
|
3521 jcc(Assembler::less, L); // else (s >= n)
|
|
|
3522 movl(hi, lo); // x := x << n
|
|
|
3523 xorl(lo, lo);
|
|
|
3524 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n!
|
|
|
3525 bind(L); // s (mod n) < n
|
|
|
3526 shldl(hi, lo); // x := x << s
|
|
|
3527 shll(lo);
|
|
|
3528 }
|
|
|
3529
|
|
|
3530
|
|
|
3531 void MacroAssembler::lshr(Register hi, Register lo, bool sign_extension) {
|
|
|
3532 // Java shift right long support (semantics as described in JVM spec., p.306 & p.310)
|
|
|
3533 // (basic idea for shift counts s >= n: x >> s == (x >> n) >> (s - n))
|
|
|
3534 assert(hi != rcx, "must not use rcx");
|
|
|
3535 assert(lo != rcx, "must not use rcx");
|
|
|
3536 const Register s = rcx; // shift count
|
|
|
3537 const int n = BitsPerWord;
|
|
|
3538 Label L;
|
|
|
3539 andl(s, 0x3f); // s := s & 0x3f (s < 0x40)
|
|
|
3540 cmpl(s, n); // if (s < n)
|
|
|
3541 jcc(Assembler::less, L); // else (s >= n)
|
|
|
3542 movl(lo, hi); // x := x >> n
|
|
|
3543 if (sign_extension) sarl(hi, 31);
|
|
|
3544 else xorl(hi, hi);
|
|
|
3545 // Note: subl(s, n) is not needed since the Intel shift instructions work rcx mod n!
|
|
|
3546 bind(L); // s (mod n) < n
|
|
|
3547 shrdl(lo, hi); // x := x >> s
|
|
|
3548 if (sign_extension) sarl(hi);
|
|
|
3549 else shrl(hi);
|
|
|
3550 }
|
|
|
3551
|
|
|
3552
|
|
|
3553 // Note: y_lo will be destroyed
|
|
|
3554 void MacroAssembler::lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo) {
|
|
|
3555 // Long compare for Java (semantics as described in JVM spec.)
|
|
|
3556 Label high, low, done;
|
|
|
3557
|
|
|
3558 cmpl(x_hi, y_hi);
|
|
|
3559 jcc(Assembler::less, low);
|
|
|
3560 jcc(Assembler::greater, high);
|
|
|
3561 // x_hi is the return register
|
|
|
3562 xorl(x_hi, x_hi);
|
|
|
3563 cmpl(x_lo, y_lo);
|
|
|
3564 jcc(Assembler::below, low);
|
|
|
3565 jcc(Assembler::equal, done);
|
|
|
3566
|
|
|
3567 bind(high);
|
|
|
3568 xorl(x_hi, x_hi);
|
|
|
3569 increment(x_hi);
|
|
|
3570 jmp(done);
|
|
|
3571
|
|
|
3572 bind(low);
|
|
|
3573 xorl(x_hi, x_hi);
|
|
|
3574 decrement(x_hi);
|
|
|
3575
|
|
|
3576 bind(done);
|
|
|
3577 }
|
|
|
3578
|
|
|
3579
|
|
|
3580 void MacroAssembler::save_rax(Register tmp) {
|
|
|
3581 if (tmp == noreg) pushl(rax);
|
|
|
3582 else if (tmp != rax) movl(tmp, rax);
|
|
|
3583 }
|
|
|
3584
|
|
|
3585
|
|
|
3586 void MacroAssembler::restore_rax(Register tmp) {
|
|
|
3587 if (tmp == noreg) popl(rax);
|
|
|
3588 else if (tmp != rax) movl(rax, tmp);
|
|
|
3589 }
|
|
|
3590
|
|
|
3591
|
|
|
3592 void MacroAssembler::fremr(Register tmp) {
|
|
|
3593 save_rax(tmp);
|
|
|
3594 { Label L;
|
|
|
3595 bind(L);
|
|
|
3596 fprem();
|
|
|
3597 fwait(); fnstsw_ax();
|
|
|
3598 sahf();
|
|
|
3599 jcc(Assembler::parity, L);
|
|
|
3600 }
|
|
|
3601 restore_rax(tmp);
|
|
|
3602 // Result is in ST0.
|
|
|
3603 // Note: fxch & fpop to get rid of ST1
|
|
|
3604 // (otherwise FPU stack could overflow eventually)
|
|
|
3605 fxch(1);
|
|
|
3606 fpop();
|
|
|
3607 }
|
|
|
3608
|
|
|
3609
|
|
|
3610 static const double pi_4 = 0.7853981633974483;
|
|
|
3611
|
|
|
3612 void MacroAssembler::trigfunc(char trig, int num_fpu_regs_in_use) {
|
|
|
3613 // A hand-coded argument reduction for values in fabs(pi/4, pi/2)
|
|
|
3614 // was attempted in this code; unfortunately it appears that the
|
|
|
3615 // switch to 80-bit precision and back causes this to be
|
|
|
3616 // unprofitable compared with simply performing a runtime call if
|
|
|
3617 // the argument is out of the (-pi/4, pi/4) range.
|
|
|
3618
|
|
|
3619 Register tmp = noreg;
|
|
|
3620 if (!VM_Version::supports_cmov()) {
|
|
|
3621 // fcmp needs a temporary so preserve rbx,
|
|
|
3622 tmp = rbx;
|
|
|
3623 pushl(tmp);
|
|
|
3624 }
|
|
|
3625
|
|
|
3626 Label slow_case, done;
|
|
|
3627
|
|
|
3628 // x ?<= pi/4
|
|
|
3629 fld_d(ExternalAddress((address)&pi_4));
|
|
|
3630 fld_s(1); // Stack: X PI/4 X
|
|
|
3631 fabs(); // Stack: |X| PI/4 X
|
|
|
3632 fcmp(tmp);
|
|
|
3633 jcc(Assembler::above, slow_case);
|
|
|
3634
|
|
|
3635 // fastest case: -pi/4 <= x <= pi/4
|
|
|
3636 switch(trig) {
|
|
|
3637 case 's':
|
|
|
3638 fsin();
|
|
|
3639 break;
|
|
|
3640 case 'c':
|
|
|
3641 fcos();
|
|
|
3642 break;
|
|
|
3643 case 't':
|
|
|
3644 ftan();
|
|
|
3645 break;
|
|
|
3646 default:
|
|
|
3647 assert(false, "bad intrinsic");
|
|
|
3648 break;
|
|
|
3649 }
|
|
|
3650 jmp(done);
|
|
|
3651
|
|
|
3652 // slow case: runtime call
|
|
|
3653 bind(slow_case);
|
|
|
3654 // Preserve registers across runtime call
|
|
|
3655 pushad();
|
|
|
3656 int incoming_argument_and_return_value_offset = -1;
|
|
|
3657 if (num_fpu_regs_in_use > 1) {
|
|
|
3658 // Must preserve all other FPU regs (could alternatively convert
|
|
|
3659 // SharedRuntime::dsin and dcos into assembly routines known not to trash
|
|
|
3660 // FPU state, but can not trust C compiler)
|
|
|
3661 NEEDS_CLEANUP;
|
|
|
3662 // NOTE that in this case we also push the incoming argument to
|
|
|
3663 // the stack and restore it later; we also use this stack slot to
|
|
|
3664 // hold the return value from dsin or dcos.
|
|
|
3665 for (int i = 0; i < num_fpu_regs_in_use; i++) {
|
|
|
3666 subl(rsp, wordSize*2);
|
|
|
3667 fstp_d(Address(rsp, 0));
|
|
|
3668 }
|
|
|
3669 incoming_argument_and_return_value_offset = 2*wordSize*(num_fpu_regs_in_use-1);
|
|
|
3670 fld_d(Address(rsp, incoming_argument_and_return_value_offset));
|
|
|
3671 }
|
|
|
3672 subl(rsp, wordSize*2);
|
|
|
3673 fstp_d(Address(rsp, 0));
|
|
|
3674 // NOTE: we must not use call_VM_leaf here because that requires a
|
|
|
3675 // complete interpreter frame in debug mode -- same bug as 4387334
|
|
|
3676 NEEDS_CLEANUP;
|
|
|
3677 // Need to add stack banging before this runtime call if it needs to
|
|
|
3678 // be taken; however, there is no generic stack banging routine at
|
|
|
3679 // the MacroAssembler level
|
|
|
3680 switch(trig) {
|
|
|
3681 case 's':
|
|
|
3682 {
|
|
|
3683 call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dsin)));
|
|
|
3684 }
|
|
|
3685 break;
|
|
|
3686 case 'c':
|
|
|
3687 {
|
|
|
3688 call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dcos)));
|
|
|
3689 }
|
|
|
3690 break;
|
|
|
3691 case 't':
|
|
|
3692 {
|
|
|
3693 call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtan)));
|
|
|
3694 }
|
|
|
3695 break;
|
|
|
3696 default:
|
|
|
3697 assert(false, "bad intrinsic");
|
|
|
3698 break;
|
|
|
3699 }
|
|
|
3700 addl(rsp, wordSize * 2);
|
|
|
3701 if (num_fpu_regs_in_use > 1) {
|
|
|
3702 // Must save return value to stack and then restore entire FPU stack
|
|
|
3703 fstp_d(Address(rsp, incoming_argument_and_return_value_offset));
|
|
|
3704 for (int i = 0; i < num_fpu_regs_in_use; i++) {
|
|
|
3705 fld_d(Address(rsp, 0));
|
|
|
3706 addl(rsp, wordSize*2);
|
|
|
3707 }
|
|
|
3708 }
|
|
|
3709 popad();
|
|
|
3710
|
|
|
3711 // Come here with result in F-TOS
|
|
|
3712 bind(done);
|
|
|
3713
|
|
|
3714 if (tmp != noreg) {
|
|
|
3715 popl(tmp);
|
|
|
3716 }
|
|
|
3717 }
|
|
|
3718
|
|
|
3719 void MacroAssembler::jC2(Register tmp, Label& L) {
|
|
|
3720 // set parity bit if FPU flag C2 is set (via rax)
|
|
|
3721 save_rax(tmp);
|
|
|
3722 fwait(); fnstsw_ax();
|
|
|
3723 sahf();
|
|
|
3724 restore_rax(tmp);
|
|
|
3725 // branch
|
|
|
3726 jcc(Assembler::parity, L);
|
|
|
3727 }
|
|
|
3728
|
|
|
3729
|
|
|
3730 void MacroAssembler::jnC2(Register tmp, Label& L) {
|
|
|
3731 // set parity bit if FPU flag C2 is set (via rax)
|
|
|
3732 save_rax(tmp);
|
|
|
3733 fwait(); fnstsw_ax();
|
|
|
3734 sahf();
|
|
|
3735 restore_rax(tmp);
|
|
|
3736 // branch
|
|
|
3737 jcc(Assembler::noParity, L);
|
|
|
3738 }
|
|
|
3739
|
|
|
3740
|
|
|
3741 void MacroAssembler::fcmp(Register tmp) {
|
|
|
3742 fcmp(tmp, 1, true, true);
|
|
|
3743 }
|
|
|
3744
|
|
|
3745
|
|
|
3746 void MacroAssembler::fcmp(Register tmp, int index, bool pop_left, bool pop_right) {
|
|
|
3747 assert(!pop_right || pop_left, "usage error");
|
|
|
3748 if (VM_Version::supports_cmov()) {
|
|
|
3749 assert(tmp == noreg, "unneeded temp");
|
|
|
3750 if (pop_left) {
|
|
|
3751 fucomip(index);
|
|
|
3752 } else {
|
|
|
3753 fucomi(index);
|
|
|
3754 }
|
|
|
3755 if (pop_right) {
|
|
|
3756 fpop();
|
|
|
3757 }
|
|
|
3758 } else {
|
|
|
3759 assert(tmp != noreg, "need temp");
|
|
|
3760 if (pop_left) {
|
|
|
3761 if (pop_right) {
|
|
|
3762 fcompp();
|
|
|
3763 } else {
|
|
|
3764 fcomp(index);
|
|
|
3765 }
|
|
|
3766 } else {
|
|
|
3767 fcom(index);
|
|
|
3768 }
|
|
|
3769 // convert FPU condition into eflags condition via rax,
|
|
|
3770 save_rax(tmp);
|
|
|
3771 fwait(); fnstsw_ax();
|
|
|
3772 sahf();
|
|
|
3773 restore_rax(tmp);
|
|
|
3774 }
|
|
|
3775 // condition codes set as follows:
|
|
|
3776 //
|
|
|
3777 // CF (corresponds to C0) if x < y
|
|
|
3778 // PF (corresponds to C2) if unordered
|
|
|
3779 // ZF (corresponds to C3) if x = y
|
|
|
3780 }
|
|
|
3781
|
|
|
3782
|
|
|
3783 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less) {
|
|
|
3784 fcmp2int(dst, unordered_is_less, 1, true, true);
|
|
|
3785 }
|
|
|
3786
|
|
|
3787
|
|
|
3788 void MacroAssembler::fcmp2int(Register dst, bool unordered_is_less, int index, bool pop_left, bool pop_right) {
|
|
|
3789 fcmp(VM_Version::supports_cmov() ? noreg : dst, index, pop_left, pop_right);
|
|
|
3790 Label L;
|
|
|
3791 if (unordered_is_less) {
|
|
|
3792 movl(dst, -1);
|
|
|
3793 jcc(Assembler::parity, L);
|
|
|
3794 jcc(Assembler::below , L);
|
|
|
3795 movl(dst, 0);
|
|
|
3796 jcc(Assembler::equal , L);
|
|
|
3797 increment(dst);
|
|
|
3798 } else { // unordered is greater
|
|
|
3799 movl(dst, 1);
|
|
|
3800 jcc(Assembler::parity, L);
|
|
|
3801 jcc(Assembler::above , L);
|
|
|
3802 movl(dst, 0);
|
|
|
3803 jcc(Assembler::equal , L);
|
|
|
3804 decrement(dst);
|
|
|
3805 }
|
|
|
3806 bind(L);
|
|
|
3807 }
|
|
|
3808
|
|
|
3809 void MacroAssembler::cmpss2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) {
|
|
|
3810 ucomiss(opr1, opr2);
|
|
|
3811
|
|
|
3812 Label L;
|
|
|
3813 if (unordered_is_less) {
|
|
|
3814 movl(dst, -1);
|
|
|
3815 jcc(Assembler::parity, L);
|
|
|
3816 jcc(Assembler::below , L);
|
|
|
3817 movl(dst, 0);
|
|
|
3818 jcc(Assembler::equal , L);
|
|
|
3819 increment(dst);
|
|
|
3820 } else { // unordered is greater
|
|
|
3821 movl(dst, 1);
|
|
|
3822 jcc(Assembler::parity, L);
|
|
|
3823 jcc(Assembler::above , L);
|
|
|
3824 movl(dst, 0);
|
|
|
3825 jcc(Assembler::equal , L);
|
|
|
3826 decrement(dst);
|
|
|
3827 }
|
|
|
3828 bind(L);
|
|
|
3829 }
|
|
|
3830
|
|
|
3831 void MacroAssembler::cmpsd2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less) {
|
|
|
3832 ucomisd(opr1, opr2);
|
|
|
3833
|
|
|
3834 Label L;
|
|
|
3835 if (unordered_is_less) {
|
|
|
3836 movl(dst, -1);
|
|
|
3837 jcc(Assembler::parity, L);
|
|
|
3838 jcc(Assembler::below , L);
|
|
|
3839 movl(dst, 0);
|
|
|
3840 jcc(Assembler::equal , L);
|
|
|
3841 increment(dst);
|
|
|
3842 } else { // unordered is greater
|
|
|
3843 movl(dst, 1);
|
|
|
3844 jcc(Assembler::parity, L);
|
|
|
3845 jcc(Assembler::above , L);
|
|
|
3846 movl(dst, 0);
|
|
|
3847 jcc(Assembler::equal , L);
|
|
|
3848 decrement(dst);
|
|
|
3849 }
|
|
|
3850 bind(L);
|
|
|
3851 }
|
|
|
3852
|
|
|
3853
|
|
|
3854
|
|
|
3855 void MacroAssembler::fpop() {
|
|
|
3856 ffree();
|
|
|
3857 fincstp();
|
|
|
3858 }
|
|
|
3859
|
|
|
3860
|
|
|
3861 void MacroAssembler::sign_extend_short(Register reg) {
|
|
|
3862 if (VM_Version::is_P6()) {
|
|
|
3863 movsxw(reg, reg);
|
|
|
3864 } else {
|
|
|
3865 shll(reg, 16);
|
|
|
3866 sarl(reg, 16);
|
|
|
3867 }
|
|
|
3868 }
|
|
|
3869
|
|
|
3870
|
|
|
3871 void MacroAssembler::sign_extend_byte(Register reg) {
|
|
|
3872 if (VM_Version::is_P6() && reg->has_byte_register()) {
|
|
|
3873 movsxb(reg, reg);
|
|
|
3874 } else {
|
|
|
3875 shll(reg, 24);
|
|
|
3876 sarl(reg, 24);
|
|
|
3877 }
|
|
|
3878 }
|
|
|
3879
|
|
|
3880
|
|
|
3881 void MacroAssembler::division_with_shift (Register reg, int shift_value) {
|
|
|
3882 assert (shift_value > 0, "illegal shift value");
|
|
|
3883 Label _is_positive;
|
|
|
3884 testl (reg, reg);
|
|
|
3885 jcc (Assembler::positive, _is_positive);
|
|
|
3886 int offset = (1 << shift_value) - 1 ;
|
|
|
3887
|
|
|
3888 increment(reg, offset);
|
|
|
3889
|
|
|
3890 bind (_is_positive);
|
|
|
3891 sarl(reg, shift_value);
|
|
|
3892 }
|
|
|
3893
|
|
|
3894
|
|
|
3895 void MacroAssembler::round_to(Register reg, int modulus) {
|
|
|
3896 addl(reg, modulus - 1);
|
|
|
3897 andl(reg, -modulus);
|
|
|
3898 }
|
|
|
3899
|
|
|
3900 // C++ bool manipulation
|
|
|
3901
|
|
|
3902 void MacroAssembler::movbool(Register dst, Address src) {
|
|
|
3903 if(sizeof(bool) == 1)
|
|
|
3904 movb(dst, src);
|
|
|
3905 else if(sizeof(bool) == 2)
|
|
|
3906 movw(dst, src);
|
|
|
3907 else if(sizeof(bool) == 4)
|
|
|
3908 movl(dst, src);
|
|
|
3909 else
|
|
|
3910 // unsupported
|
|
|
3911 ShouldNotReachHere();
|
|
|
3912 }
|
|
|
3913
|
|
|
3914 void MacroAssembler::movbool(Address dst, bool boolconst) {
|
|
|
3915 if(sizeof(bool) == 1)
|
|
|
3916 movb(dst, (int) boolconst);
|
|
|
3917 else if(sizeof(bool) == 2)
|
|
|
3918 movw(dst, (int) boolconst);
|
|
|
3919 else if(sizeof(bool) == 4)
|
|
|
3920 movl(dst, (int) boolconst);
|
|
|
3921 else
|
|
|
3922 // unsupported
|
|
|
3923 ShouldNotReachHere();
|
|
|
3924 }
|
|
|
3925
|
|
|
3926 void MacroAssembler::movbool(Address dst, Register src) {
|
|
|
3927 if(sizeof(bool) == 1)
|
|
|
3928 movb(dst, src);
|
|
|
3929 else if(sizeof(bool) == 2)
|
|
|
3930 movw(dst, src);
|
|
|
3931 else if(sizeof(bool) == 4)
|
|
|
3932 movl(dst, src);
|
|
|
3933 else
|
|
|
3934 // unsupported
|
|
|
3935 ShouldNotReachHere();
|
|
|
3936 }
|
|
|
3937
|
|
|
3938 void MacroAssembler::testbool(Register dst) {
|
|
|
3939 if(sizeof(bool) == 1)
|
|
|
3940 testb(dst, (int) 0xff);
|
|
|
3941 else if(sizeof(bool) == 2) {
|
|
|
3942 // testw implementation needed for two byte bools
|
|
|
3943 ShouldNotReachHere();
|
|
|
3944 } else if(sizeof(bool) == 4)
|
|
|
3945 testl(dst, dst);
|
|
|
3946 else
|
|
|
3947 // unsupported
|
|
|
3948 ShouldNotReachHere();
|
|
|
3949 }
|
|
|
3950
|
|
|
3951 void MacroAssembler::verify_oop(Register reg, const char* s) {
|
|
|
3952 if (!VerifyOops) return;
|
|
|
3953 // Pass register number to verify_oop_subroutine
|
|
|
3954 char* b = new char[strlen(s) + 50];
|
|
|
3955 sprintf(b, "verify_oop: %s: %s", reg->name(), s);
|
|
|
3956 pushl(rax); // save rax,
|
|
|
3957 pushl(reg); // pass register argument
|
|
|
3958 ExternalAddress buffer((address) b);
|
|
|
3959 pushptr(buffer.addr());
|
|
|
3960 // call indirectly to solve generation ordering problem
|
|
|
3961 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address()));
|
|
|
3962 call(rax);
|
|
|
3963 }
|
|
|
3964
|
|
|
3965
|
|
|
3966 void MacroAssembler::verify_oop_addr(Address addr, const char* s) {
|
|
|
3967 if (!VerifyOops) return;
|
|
|
3968 // QQQ fix this
|
|
|
3969 // Address adjust(addr.base(), addr.index(), addr.scale(), addr.disp() + BytesPerWord);
|
|
|
3970 // Pass register number to verify_oop_subroutine
|
|
|
3971 char* b = new char[strlen(s) + 50];
|
|
|
3972 sprintf(b, "verify_oop_addr: %s", s);
|
|
|
3973 pushl(rax); // save rax,
|
|
|
3974 // addr may contain rsp so we will have to adjust it based on the push
|
|
|
3975 // we just did
|
|
|
3976 if (addr.uses(rsp)) {
|
|
|
3977 leal(rax, addr);
|
|
|
3978 pushl(Address(rax, BytesPerWord));
|
|
|
3979 } else {
|
|
|
3980 pushl(addr);
|
|
|
3981 }
|
|
|
3982 ExternalAddress buffer((address) b);
|
|
|
3983 // pass msg argument
|
|
|
3984 pushptr(buffer.addr());
|
|
|
3985 // call indirectly to solve generation ordering problem
|
|
|
3986 movptr(rax, ExternalAddress(StubRoutines::verify_oop_subroutine_entry_address()));
|
|
|
3987 call(rax);
|
|
|
3988 // Caller pops the arguments and restores rax, from the stack
|
|
|
3989 }
|
|
|
3990
|
|
|
3991
|
|
|
3992 void MacroAssembler::stop(const char* msg) {
|
|
|
3993 ExternalAddress message((address)msg);
|
|
|
3994 // push address of message
|
|
|
3995 pushptr(message.addr());
|
|
|
3996 { Label L; call(L, relocInfo::none); bind(L); } // push eip
|
|
|
3997 pushad(); // push registers
|
|
|
3998 call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug)));
|
|
|
3999 hlt();
|
|
|
4000 }
|
|
|
4001
|
|
|
4002
|
|
|
4003 void MacroAssembler::warn(const char* msg) {
|
|
|
4004 push_CPU_state();
|
|
|
4005
|
|
|
4006 ExternalAddress message((address) msg);
|
|
|
4007 // push address of message
|
|
|
4008 pushptr(message.addr());
|
|
|
4009
|
|
|
4010 call(RuntimeAddress(CAST_FROM_FN_PTR(address, warning)));
|
|
|
4011 addl(rsp, wordSize); // discard argument
|
|
|
4012 pop_CPU_state();
|
|
|
4013 }
|
|
|
4014
|
|
|
4015
|
|
|
4016 void MacroAssembler::debug(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip, char* msg) {
|
|
|
4017 // In order to get locks to work, we need to fake a in_VM state
|
|
|
4018 JavaThread* thread = JavaThread::current();
|
|
|
4019 JavaThreadState saved_state = thread->thread_state();
|
|
|
4020 thread->set_thread_state(_thread_in_vm);
|
|
|
4021 if (ShowMessageBoxOnError) {
|
|
|
4022 JavaThread* thread = JavaThread::current();
|
|
|
4023 JavaThreadState saved_state = thread->thread_state();
|
|
|
4024 thread->set_thread_state(_thread_in_vm);
|
|
|
4025 ttyLocker ttyl;
|
|
|
4026 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
|
|
|
4027 BytecodeCounter::print();
|
|
|
4028 }
|
|
|
4029 // To see where a verify_oop failed, get $ebx+40/X for this frame.
|
|
|
4030 // This is the value of eip which points to where verify_oop will return.
|
|
|
4031 if (os::message_box(msg, "Execution stopped, print registers?")) {
|
|
|
4032 tty->print_cr("eip = 0x%08x", eip);
|
|
|
4033 tty->print_cr("rax, = 0x%08x", rax);
|
|
|
4034 tty->print_cr("rbx, = 0x%08x", rbx);
|
|
|
4035 tty->print_cr("rcx = 0x%08x", rcx);
|
|
|
4036 tty->print_cr("rdx = 0x%08x", rdx);
|
|
|
4037 tty->print_cr("rdi = 0x%08x", rdi);
|
|
|
4038 tty->print_cr("rsi = 0x%08x", rsi);
|
|
|
4039 tty->print_cr("rbp, = 0x%08x", rbp);
|
|
|
4040 tty->print_cr("rsp = 0x%08x", rsp);
|
|
|
4041 BREAKPOINT;
|
|
|
4042 }
|
|
|
4043 } else {
|
|
|
4044 ::tty->print_cr("=============== DEBUG MESSAGE: %s ================\n", msg);
|
|
|
4045 assert(false, "DEBUG MESSAGE");
|
|
|
4046 }
|
|
|
4047 ThreadStateTransition::transition(thread, _thread_in_vm, saved_state);
|
|
|
4048 }
|
|
|
4049
|
|
|
4050
|
|
|
4051
|
|
|
4052 void MacroAssembler::os_breakpoint() {
|
|
|
4053 // instead of directly emitting a breakpoint, call os:breakpoint for better debugability
|
|
|
4054 // (e.g., MSVC can't call ps() otherwise)
|
|
|
4055 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));
|
|
|
4056 }
|
|
|
4057
|
|
|
4058
|
|
|
4059 void MacroAssembler::push_fTOS() {
|
|
|
4060 subl(rsp, 2 * wordSize);
|
|
|
4061 fstp_d(Address(rsp, 0));
|
|
|
4062 }
|
|
|
4063
|
|
|
4064
|
|
|
4065 void MacroAssembler::pop_fTOS() {
|
|
|
4066 fld_d(Address(rsp, 0));
|
|
|
4067 addl(rsp, 2 * wordSize);
|
|
|
4068 }
|
|
|
4069
|
|
|
4070
|
|
|
4071 void MacroAssembler::empty_FPU_stack() {
|
|
|
4072 if (VM_Version::supports_mmx()) {
|
|
|
4073 emms();
|
|
|
4074 } else {
|
|
|
4075 for (int i = 8; i-- > 0; ) ffree(i);
|
|
|
4076 }
|
|
|
4077 }
|
|
|
4078
|
|
|
4079
|
|
|
4080 class ControlWord {
|
|
|
4081 public:
|
|
|
4082 int32_t _value;
|
|
|
4083
|
|
|
4084 int rounding_control() const { return (_value >> 10) & 3 ; }
|
|
|
4085 int precision_control() const { return (_value >> 8) & 3 ; }
|
|
|
4086 bool precision() const { return ((_value >> 5) & 1) != 0; }
|
|
|
4087 bool underflow() const { return ((_value >> 4) & 1) != 0; }
|
|
|
4088 bool overflow() const { return ((_value >> 3) & 1) != 0; }
|
|
|
4089 bool zero_divide() const { return ((_value >> 2) & 1) != 0; }
|
|
|
4090 bool denormalized() const { return ((_value >> 1) & 1) != 0; }
|
|
|
4091 bool invalid() const { return ((_value >> 0) & 1) != 0; }
|
|
|
4092
|
|
|
4093 void print() const {
|
|
|
4094 // rounding control
|
|
|
4095 const char* rc;
|
|
|
4096 switch (rounding_control()) {
|
|
|
4097 case 0: rc = "round near"; break;
|
|
|
4098 case 1: rc = "round down"; break;
|
|
|
4099 case 2: rc = "round up "; break;
|
|
|
4100 case 3: rc = "chop "; break;
|
|
|
4101 };
|
|
|
4102 // precision control
|
|
|
4103 const char* pc;
|
|
|
4104 switch (precision_control()) {
|
|
|
4105 case 0: pc = "24 bits "; break;
|
|
|
4106 case 1: pc = "reserved"; break;
|
|
|
4107 case 2: pc = "53 bits "; break;
|
|
|
4108 case 3: pc = "64 bits "; break;
|
|
|
4109 };
|
|
|
4110 // flags
|
|
|
4111 char f[9];
|
|
|
4112 f[0] = ' ';
|
|
|
4113 f[1] = ' ';
|
|
|
4114 f[2] = (precision ()) ? 'P' : 'p';
|
|
|
4115 f[3] = (underflow ()) ? 'U' : 'u';
|
|
|
4116 f[4] = (overflow ()) ? 'O' : 'o';
|
|
|
4117 f[5] = (zero_divide ()) ? 'Z' : 'z';
|
|
|
4118 f[6] = (denormalized()) ? 'D' : 'd';
|
|
|
4119 f[7] = (invalid ()) ? 'I' : 'i';
|
|
|
4120 f[8] = '\x0';
|
|
|
4121 // output
|
|
|
4122 printf("%04x masks = %s, %s, %s", _value & 0xFFFF, f, rc, pc);
|
|
|
4123 }
|
|
|
4124
|
|
|
4125 };
|
|
|
4126
|
|
|
4127
|
|
|
4128 class StatusWord {
|
|
|
4129 public:
|
|
|
4130 int32_t _value;
|
|
|
4131
|
|
|
4132 bool busy() const { return ((_value >> 15) & 1) != 0; }
|
|
|
4133 bool C3() const { return ((_value >> 14) & 1) != 0; }
|
|
|
4134 bool C2() const { return ((_value >> 10) & 1) != 0; }
|
|
|
4135 bool C1() const { return ((_value >> 9) & 1) != 0; }
|
|
|
4136 bool C0() const { return ((_value >> 8) & 1) != 0; }
|
|
|
4137 int top() const { return (_value >> 11) & 7 ; }
|
|
|
4138 bool error_status() const { return ((_value >> 7) & 1) != 0; }
|
|
|
4139 bool stack_fault() const { return ((_value >> 6) & 1) != 0; }
|
|
|
4140 bool precision() const { return ((_value >> 5) & 1) != 0; }
|
|
|
4141 bool underflow() const { return ((_value >> 4) & 1) != 0; }
|
|
|
4142 bool overflow() const { return ((_value >> 3) & 1) != 0; }
|
|
|
4143 bool zero_divide() const { return ((_value >> 2) & 1) != 0; }
|
|
|
4144 bool denormalized() const { return ((_value >> 1) & 1) != 0; }
|
|
|
4145 bool invalid() const { return ((_value >> 0) & 1) != 0; }
|
|
|
4146
|
|
|
4147 void print() const {
|
|
|
4148 // condition codes
|
|
|
4149 char c[5];
|
|
|
4150 c[0] = (C3()) ? '3' : '-';
|
|
|
4151 c[1] = (C2()) ? '2' : '-';
|
|
|
4152 c[2] = (C1()) ? '1' : '-';
|
|
|
4153 c[3] = (C0()) ? '0' : '-';
|
|
|
4154 c[4] = '\x0';
|
|
|
4155 // flags
|
|
|
4156 char f[9];
|
|
|
4157 f[0] = (error_status()) ? 'E' : '-';
|
|
|
4158 f[1] = (stack_fault ()) ? 'S' : '-';
|
|
|
4159 f[2] = (precision ()) ? 'P' : '-';
|
|
|
4160 f[3] = (underflow ()) ? 'U' : '-';
|
|
|
4161 f[4] = (overflow ()) ? 'O' : '-';
|
|
|
4162 f[5] = (zero_divide ()) ? 'Z' : '-';
|
|
|
4163 f[6] = (denormalized()) ? 'D' : '-';
|
|
|
4164 f[7] = (invalid ()) ? 'I' : '-';
|
|
|
4165 f[8] = '\x0';
|
|
|
4166 // output
|
|
|
4167 printf("%04x flags = %s, cc = %s, top = %d", _value & 0xFFFF, f, c, top());
|
|
|
4168 }
|
|
|
4169
|
|
|
4170 };
|
|
|
4171
|
|
|
4172
|
|
|
4173 class TagWord {
|
|
|
4174 public:
|
|
|
4175 int32_t _value;
|
|
|
4176
|
|
|
4177 int tag_at(int i) const { return (_value >> (i*2)) & 3; }
|
|
|
4178
|
|
|
4179 void print() const {
|
|
|
4180 printf("%04x", _value & 0xFFFF);
|
|
|
4181 }
|
|
|
4182
|
|
|
4183 };
|
|
|
4184
|
|
|
4185
|
|
|
4186 class FPU_Register {
|
|
|
4187 public:
|
|
|
4188 int32_t _m0;
|
|
|
4189 int32_t _m1;
|
|
|
4190 int16_t _ex;
|
|
|
4191
|
|
|
4192 bool is_indefinite() const {
|
|
|
4193 return _ex == -1 && _m1 == (int32_t)0xC0000000 && _m0 == 0;
|
|
|
4194 }
|
|
|
4195
|
|
|
4196 void print() const {
|
|
|
4197 char sign = (_ex < 0) ? '-' : '+';
|
|
|
4198 const char* kind = (_ex == 0x7FFF || _ex == (int16_t)-1) ? "NaN" : " ";
|
|
|
4199 printf("%c%04hx.%08x%08x %s", sign, _ex, _m1, _m0, kind);
|
|
|
4200 };
|
|
|
4201
|
|
|
4202 };
|
|
|
4203
|
|
|
4204
|
|
|
4205 class FPU_State {
|
|
|
4206 public:
|
|
|
4207 enum {
|
|
|
4208 register_size = 10,
|
|
|
4209 number_of_registers = 8,
|
|
|
4210 register_mask = 7
|
|
|
4211 };
|
|
|
4212
|
|
|
4213 ControlWord _control_word;
|
|
|
4214 StatusWord _status_word;
|
|
|
4215 TagWord _tag_word;
|
|
|
4216 int32_t _error_offset;
|
|
|
4217 int32_t _error_selector;
|
|
|
4218 int32_t _data_offset;
|
|
|
4219 int32_t _data_selector;
|
|
|
4220 int8_t _register[register_size * number_of_registers];
|
|
|
4221
|
|
|
4222 int tag_for_st(int i) const { return _tag_word.tag_at((_status_word.top() + i) & register_mask); }
|
|
|
4223 FPU_Register* st(int i) const { return (FPU_Register*)&_register[register_size * i]; }
|
|
|
4224
|
|
|
4225 const char* tag_as_string(int tag) const {
|
|
|
4226 switch (tag) {
|
|
|
4227 case 0: return "valid";
|
|
|
4228 case 1: return "zero";
|
|
|
4229 case 2: return "special";
|
|
|
4230 case 3: return "empty";
|
|
|
4231 }
|
|
|
4232 ShouldNotReachHere()
|
|
|
4233 return NULL;
|
|
|
4234 }
|
|
|
4235
|
|
|
4236 void print() const {
|
|
|
4237 // print computation registers
|
|
|
4238 { int t = _status_word.top();
|
|
|
4239 for (int i = 0; i < number_of_registers; i++) {
|
|
|
4240 int j = (i - t) & register_mask;
|
|
|
4241 printf("%c r%d = ST%d = ", (j == 0 ? '*' : ' '), i, j);
|
|
|
4242 st(j)->print();
|
|
|
4243 printf(" %s\n", tag_as_string(_tag_word.tag_at(i)));
|
|
|
4244 }
|
|
|
4245 }
|
|
|
4246 printf("\n");
|
|
|
4247 // print control registers
|
|
|
4248 printf("ctrl = "); _control_word.print(); printf("\n");
|
|
|
4249 printf("stat = "); _status_word .print(); printf("\n");
|
|
|
4250 printf("tags = "); _tag_word .print(); printf("\n");
|
|
|
4251 }
|
|
|
4252
|
|
|
4253 };
|
|
|
4254
|
|
|
4255
|
|
|
4256 class Flag_Register {
|
|
|
4257 public:
|
|
|
4258 int32_t _value;
|
|
|
4259
|
|
|
4260 bool overflow() const { return ((_value >> 11) & 1) != 0; }
|
|
|
4261 bool direction() const { return ((_value >> 10) & 1) != 0; }
|
|
|
4262 bool sign() const { return ((_value >> 7) & 1) != 0; }
|
|
|
4263 bool zero() const { return ((_value >> 6) & 1) != 0; }
|
|
|
4264 bool auxiliary_carry() const { return ((_value >> 4) & 1) != 0; }
|
|
|
4265 bool parity() const { return ((_value >> 2) & 1) != 0; }
|
|
|
4266 bool carry() const { return ((_value >> 0) & 1) != 0; }
|
|
|
4267
|
|
|
4268 void print() const {
|
|
|
4269 // flags
|
|
|
4270 char f[8];
|
|
|
4271 f[0] = (overflow ()) ? 'O' : '-';
|
|
|
4272 f[1] = (direction ()) ? 'D' : '-';
|
|
|
4273 f[2] = (sign ()) ? 'S' : '-';
|
|
|
4274 f[3] = (zero ()) ? 'Z' : '-';
|
|
|
4275 f[4] = (auxiliary_carry()) ? 'A' : '-';
|
|
|
4276 f[5] = (parity ()) ? 'P' : '-';
|
|
|
4277 f[6] = (carry ()) ? 'C' : '-';
|
|
|
4278 f[7] = '\x0';
|
|
|
4279 // output
|
|
|
4280 printf("%08x flags = %s", _value, f);
|
|
|
4281 }
|
|
|
4282
|
|
|
4283 };
|
|
|
4284
|
|
|
4285
|
|
|
4286 class IU_Register {
|
|
|
4287 public:
|
|
|
4288 int32_t _value;
|
|
|
4289
|
|
|
4290 void print() const {
|
|
|
4291 printf("%08x %11d", _value, _value);
|
|
|
4292 }
|
|
|
4293
|
|
|
4294 };
|
|
|
4295
|
|
|
4296
|
|
|
4297 class IU_State {
|
|
|
4298 public:
|
|
|
4299 Flag_Register _eflags;
|
|
|
4300 IU_Register _rdi;
|
|
|
4301 IU_Register _rsi;
|
|
|
4302 IU_Register _rbp;
|
|
|
4303 IU_Register _rsp;
|
|
|
4304 IU_Register _rbx;
|
|
|
4305 IU_Register _rdx;
|
|
|
4306 IU_Register _rcx;
|
|
|
4307 IU_Register _rax;
|
|
|
4308
|
|
|
4309 void print() const {
|
|
|
4310 // computation registers
|
|
|
4311 printf("rax, = "); _rax.print(); printf("\n");
|
|
|
4312 printf("rbx, = "); _rbx.print(); printf("\n");
|
|
|
4313 printf("rcx = "); _rcx.print(); printf("\n");
|
|
|
4314 printf("rdx = "); _rdx.print(); printf("\n");
|
|
|
4315 printf("rdi = "); _rdi.print(); printf("\n");
|
|
|
4316 printf("rsi = "); _rsi.print(); printf("\n");
|
|
|
4317 printf("rbp, = "); _rbp.print(); printf("\n");
|
|
|
4318 printf("rsp = "); _rsp.print(); printf("\n");
|
|
|
4319 printf("\n");
|
|
|
4320 // control registers
|
|
|
4321 printf("flgs = "); _eflags.print(); printf("\n");
|
|
|
4322 }
|
|
|
4323 };
|
|
|
4324
|
|
|
4325
|
|
|
4326 class CPU_State {
|
|
|
4327 public:
|
|
|
4328 FPU_State _fpu_state;
|
|
|
4329 IU_State _iu_state;
|
|
|
4330
|
|
|
4331 void print() const {
|
|
|
4332 printf("--------------------------------------------------\n");
|
|
|
4333 _iu_state .print();
|
|
|
4334 printf("\n");
|
|
|
4335 _fpu_state.print();
|
|
|
4336 printf("--------------------------------------------------\n");
|
|
|
4337 }
|
|
|
4338
|
|
|
4339 };
|
|
|
4340
|
|
|
4341
|
|
|
4342 static void _print_CPU_state(CPU_State* state) {
|
|
|
4343 state->print();
|
|
|
4344 };
|
|
|
4345
|
|
|
4346
|
|
|
4347 void MacroAssembler::print_CPU_state() {
|
|
|
4348 push_CPU_state();
|
|
|
4349 pushl(rsp); // pass CPU state
|
|
|
4350 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _print_CPU_state)));
|
|
|
4351 addl(rsp, wordSize); // discard argument
|
|
|
4352 pop_CPU_state();
|
|
|
4353 }
|
|
|
4354
|
|
|
4355
|
|
|
4356 static bool _verify_FPU(int stack_depth, char* s, CPU_State* state) {
|
|
|
4357 static int counter = 0;
|
|
|
4358 FPU_State* fs = &state->_fpu_state;
|
|
|
4359 counter++;
|
|
|
4360 // For leaf calls, only verify that the top few elements remain empty.
|
|
|
4361 // We only need 1 empty at the top for C2 code.
|
|
|
4362 if( stack_depth < 0 ) {
|
|
|
4363 if( fs->tag_for_st(7) != 3 ) {
|
|
|
4364 printf("FPR7 not empty\n");
|
|
|
4365 state->print();
|
|
|
4366 assert(false, "error");
|
|
|
4367 return false;
|
|
|
4368 }
|
|
|
4369 return true; // All other stack states do not matter
|
|
|
4370 }
|
|
|
4371
|
|
|
4372 assert((fs->_control_word._value & 0xffff) == StubRoutines::_fpu_cntrl_wrd_std,
|
|
|
4373 "bad FPU control word");
|
|
|
4374
|
|
|
4375 // compute stack depth
|
|
|
4376 int i = 0;
|
|
|
4377 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) < 3) i++;
|
|
|
4378 int d = i;
|
|
|
4379 while (i < FPU_State::number_of_registers && fs->tag_for_st(i) == 3) i++;
|
|
|
4380 // verify findings
|
|
|
4381 if (i != FPU_State::number_of_registers) {
|
|
|
4382 // stack not contiguous
|
|
|
4383 printf("%s: stack not contiguous at ST%d\n", s, i);
|
|
|
4384 state->print();
|
|
|
4385 assert(false, "error");
|
|
|
4386 return false;
|
|
|
4387 }
|
|
|
4388 // check if computed stack depth corresponds to expected stack depth
|
|
|
4389 if (stack_depth < 0) {
|
|
|
4390 // expected stack depth is -stack_depth or less
|
|
|
4391 if (d > -stack_depth) {
|
|
|
4392 // too many elements on the stack
|
|
|
4393 printf("%s: <= %d stack elements expected but found %d\n", s, -stack_depth, d);
|
|
|
4394 state->print();
|
|
|
4395 assert(false, "error");
|
|
|
4396 return false;
|
|
|
4397 }
|
|
|
4398 } else {
|
|
|
4399 // expected stack depth is stack_depth
|
|
|
4400 if (d != stack_depth) {
|
|
|
4401 // wrong stack depth
|
|
|
4402 printf("%s: %d stack elements expected but found %d\n", s, stack_depth, d);
|
|
|
4403 state->print();
|
|
|
4404 assert(false, "error");
|
|
|
4405 return false;
|
|
|
4406 }
|
|
|
4407 }
|
|
|
4408 // everything is cool
|
|
|
4409 return true;
|
|
|
4410 }
|
|
|
4411
|
|
|
4412
|
|
|
4413 void MacroAssembler::verify_FPU(int stack_depth, const char* s) {
|
|
|
4414 if (!VerifyFPU) return;
|
|
|
4415 push_CPU_state();
|
|
|
4416 pushl(rsp); // pass CPU state
|
|
|
4417 ExternalAddress msg((address) s);
|
|
|
4418 // pass message string s
|
|
|
4419 pushptr(msg.addr());
|
|
|
4420 pushl(stack_depth); // pass stack depth
|
|
|
4421 call(RuntimeAddress(CAST_FROM_FN_PTR(address, _verify_FPU)));
|
|
|
4422 addl(rsp, 3 * wordSize); // discard arguments
|
|
|
4423 // check for error
|
|
|
4424 { Label L;
|
|
|
4425 testl(rax, rax);
|
|
|
4426 jcc(Assembler::notZero, L);
|
|
|
4427 int3(); // break if error condition
|
|
|
4428 bind(L);
|
|
|
4429 }
|
|
|
4430 pop_CPU_state();
|
|
|
4431 }
|
|
|
4432
|
|
|
4433
|
|
|
4434 void MacroAssembler::push_IU_state() {
|
|
|
4435 pushad();
|
|
|
4436 pushfd();
|
|
|
4437 }
|
|
|
4438
|
|
|
4439
|
|
|
4440 void MacroAssembler::pop_IU_state() {
|
|
|
4441 popfd();
|
|
|
4442 popad();
|
|
|
4443 }
|
|
|
4444
|
|
|
4445
|
|
|
4446 void MacroAssembler::push_FPU_state() {
|
|
|
4447 subl(rsp, FPUStateSizeInWords * wordSize);
|
|
|
4448 fnsave(Address(rsp, 0));
|
|
|
4449 fwait();
|
|
|
4450 }
|
|
|
4451
|
|
|
4452
|
|
|
4453 void MacroAssembler::pop_FPU_state() {
|
|
|
4454 frstor(Address(rsp, 0));
|
|
|
4455 addl(rsp, FPUStateSizeInWords * wordSize);
|
|
|
4456 }
|
|
|
4457
|
|
|
4458
|
|
|
4459 void MacroAssembler::push_CPU_state() {
|
|
|
4460 push_IU_state();
|
|
|
4461 push_FPU_state();
|
|
|
4462 }
|
|
|
4463
|
|
|
4464
|
|
|
4465 void MacroAssembler::pop_CPU_state() {
|
|
|
4466 pop_FPU_state();
|
|
|
4467 pop_IU_state();
|
|
|
4468 }
|
|
|
4469
|
|
|
4470
|
|
|
4471 void MacroAssembler::push_callee_saved_registers() {
|
|
|
4472 pushl(rsi);
|
|
|
4473 pushl(rdi);
|
|
|
4474 pushl(rdx);
|
|
|
4475 pushl(rcx);
|
|
|
4476 }
|
|
|
4477
|
|
|
4478
|
|
|
4479 void MacroAssembler::pop_callee_saved_registers() {
|
|
|
4480 popl(rcx);
|
|
|
4481 popl(rdx);
|
|
|
4482 popl(rdi);
|
|
|
4483 popl(rsi);
|
|
|
4484 }
|
|
|
4485
|
|
|
4486
|
|
|
4487 void MacroAssembler::set_word_if_not_zero(Register dst) {
|
|
|
4488 xorl(dst, dst);
|
|
|
4489 set_byte_if_not_zero(dst);
|
|
|
4490 }
|
|
|
4491
|
|
|
4492 // Write serialization page so VM thread can do a pseudo remote membar.
|
|
|
4493 // We use the current thread pointer to calculate a thread specific
|
|
|
4494 // offset to write to within the page. This minimizes bus traffic
|
|
|
4495 // due to cache line collision.
|
|
|
4496 void MacroAssembler::serialize_memory(Register thread, Register tmp) {
|
|
|
4497 movl(tmp, thread);
|
|
|
4498 shrl(tmp, os::get_serialize_page_shift_count());
|
|
|
4499 andl(tmp, (os::vm_page_size() - sizeof(int)));
|
|
|
4500
|
|
|
4501 Address index(noreg, tmp, Address::times_1);
|
|
|
4502 ExternalAddress page(os::get_memory_serialize_page());
|
|
|
4503
|
|
|
4504 movptr(ArrayAddress(page, index), tmp);
|
|
|
4505 }
|
|
|
4506
|
|
|
4507
|
|
|
4508 void MacroAssembler::verify_tlab() {
|
|
|
4509 #ifdef ASSERT
|
|
|
4510 if (UseTLAB && VerifyOops) {
|
|
|
4511 Label next, ok;
|
|
|
4512 Register t1 = rsi;
|
|
|
4513 Register thread_reg = rbx;
|
|
|
4514
|
|
|
4515 pushl(t1);
|
|
|
4516 pushl(thread_reg);
|
|
|
4517 get_thread(thread_reg);
|
|
|
4518
|
|
|
4519 movl(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())));
|
|
|
4520 cmpl(t1, Address(thread_reg, in_bytes(JavaThread::tlab_start_offset())));
|
|
|
4521 jcc(Assembler::aboveEqual, next);
|
|
|
4522 stop("assert(top >= start)");
|
|
|
4523 should_not_reach_here();
|
|
|
4524
|
|
|
4525 bind(next);
|
|
|
4526 movl(t1, Address(thread_reg, in_bytes(JavaThread::tlab_end_offset())));
|
|
|
4527 cmpl(t1, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())));
|
|
|
4528 jcc(Assembler::aboveEqual, ok);
|
|
|
4529 stop("assert(top <= end)");
|
|
|
4530 should_not_reach_here();
|
|
|
4531
|
|
|
4532 bind(ok);
|
|
|
4533 popl(thread_reg);
|
|
|
4534 popl(t1);
|
|
|
4535 }
|
|
|
4536 #endif
|
|
|
4537 }
|
|
|
4538
|
|
|
4539
|
|
|
4540 // Defines obj, preserves var_size_in_bytes
|
|
|
4541 void MacroAssembler::eden_allocate(Register obj, Register var_size_in_bytes, int con_size_in_bytes,
|
|
|
4542 Register t1, Label& slow_case) {
|
|
|
4543 assert(obj == rax, "obj must be in rax, for cmpxchg");
|
|
|
4544 assert_different_registers(obj, var_size_in_bytes, t1);
|
|
|
4545 Register end = t1;
|
|
|
4546 Label retry;
|
|
|
4547 bind(retry);
|
|
|
4548 ExternalAddress heap_top((address) Universe::heap()->top_addr());
|
|
|
4549 movptr(obj, heap_top);
|
|
|
4550 if (var_size_in_bytes == noreg) {
|
|
|
4551 leal(end, Address(obj, con_size_in_bytes));
|
|
|
4552 } else {
|
|
|
4553 leal(end, Address(obj, var_size_in_bytes, Address::times_1));
|
|
|
4554 }
|
|
|
4555 // if end < obj then we wrapped around => object too long => slow case
|
|
|
4556 cmpl(end, obj);
|
|
|
4557 jcc(Assembler::below, slow_case);
|
|
|
4558 cmpptr(end, ExternalAddress((address) Universe::heap()->end_addr()));
|
|
|
4559 jcc(Assembler::above, slow_case);
|
|
|
4560 // Compare obj with the top addr, and if still equal, store the new top addr in
|
|
|
4561 // end at the address of the top addr pointer. Sets ZF if was equal, and clears
|
|
|
4562 // it otherwise. Use lock prefix for atomicity on MPs.
|
|
|
4563 if (os::is_MP()) {
|
|
|
4564 lock();
|
|
|
4565 }
|
|
|
4566 cmpxchgptr(end, heap_top);
|
|
|
4567 jcc(Assembler::notEqual, retry);
|
|
|
4568 }
|
|
|
4569
|
|
|
4570
|
|
|
4571 // Defines obj, preserves var_size_in_bytes, okay for t2 == var_size_in_bytes.
|
|
|
4572 void MacroAssembler::tlab_allocate(Register obj, Register var_size_in_bytes, int con_size_in_bytes,
|
|
|
4573 Register t1, Register t2, Label& slow_case) {
|
|
|
4574 assert_different_registers(obj, t1, t2);
|
|
|
4575 assert_different_registers(obj, var_size_in_bytes, t1);
|
|
|
4576 Register end = t2;
|
|
|
4577 Register thread = t1;
|
|
|
4578
|
|
|
4579 verify_tlab();
|
|
|
4580
|
|
|
4581 get_thread(thread);
|
|
|
4582
|
|
|
4583 movl(obj, Address(thread, JavaThread::tlab_top_offset()));
|
|
|
4584 if (var_size_in_bytes == noreg) {
|
|
|
4585 leal(end, Address(obj, con_size_in_bytes));
|
|
|
4586 } else {
|
|
|
4587 leal(end, Address(obj, var_size_in_bytes, Address::times_1));
|
|
|
4588 }
|
|
|
4589 cmpl(end, Address(thread, JavaThread::tlab_end_offset()));
|
|
|
4590 jcc(Assembler::above, slow_case);
|
|
|
4591
|
|
|
4592 // update the tlab top pointer
|
|
|
4593 movl(Address(thread, JavaThread::tlab_top_offset()), end);
|
|
|
4594
|
|
|
4595 // recover var_size_in_bytes if necessary
|
|
|
4596 if (var_size_in_bytes == end) {
|
|
|
4597 subl(var_size_in_bytes, obj);
|
|
|
4598 }
|
|
|
4599 verify_tlab();
|
|
|
4600 }
|
|
|
4601
|
|
|
4602 // Preserves rbx, and rdx.
|
|
|
4603 void MacroAssembler::tlab_refill(Label& retry, Label& try_eden, Label& slow_case) {
|
|
|
4604 Register top = rax;
|
|
|
4605 Register t1 = rcx;
|
|
|
4606 Register t2 = rsi;
|
|
|
4607 Register thread_reg = rdi;
|
|
|
4608 assert_different_registers(top, thread_reg, t1, t2, /* preserve: */ rbx, rdx);
|
|
|
4609 Label do_refill, discard_tlab;
|
|
|
4610
|
|
|
4611 if (CMSIncrementalMode || !Universe::heap()->supports_inline_contig_alloc()) {
|
|
|
4612 // No allocation in the shared eden.
|
|
|
4613 jmp(slow_case);
|
|
|
4614 }
|
|
|
4615
|
|
|
4616 get_thread(thread_reg);
|
|
|
4617
|
|
|
4618 movl(top, Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())));
|
|
|
4619 movl(t1, Address(thread_reg, in_bytes(JavaThread::tlab_end_offset())));
|
|
|
4620
|
|
|
4621 // calculate amount of free space
|
|
|
4622 subl(t1, top);
|
|
|
4623 shrl(t1, LogHeapWordSize);
|
|
|
4624
|
|
|
4625 // Retain tlab and allocate object in shared space if
|
|
|
4626 // the amount free in the tlab is too large to discard.
|
|
|
4627 cmpl(t1, Address(thread_reg, in_bytes(JavaThread::tlab_refill_waste_limit_offset())));
|
|
|
4628 jcc(Assembler::lessEqual, discard_tlab);
|
|
|
4629
|
|
|
4630 // Retain
|
|
|
4631 movl(t2, ThreadLocalAllocBuffer::refill_waste_limit_increment());
|
|
|
4632 addl(Address(thread_reg, in_bytes(JavaThread::tlab_refill_waste_limit_offset())), t2);
|
|
|
4633 if (TLABStats) {
|
|
|
4634 // increment number of slow_allocations
|
|
|
4635 addl(Address(thread_reg, in_bytes(JavaThread::tlab_slow_allocations_offset())), 1);
|
|
|
4636 }
|
|
|
4637 jmp(try_eden);
|
|
|
4638
|
|
|
4639 bind(discard_tlab);
|
|
|
4640 if (TLABStats) {
|
|
|
4641 // increment number of refills
|
|
|
4642 addl(Address(thread_reg, in_bytes(JavaThread::tlab_number_of_refills_offset())), 1);
|
|
|
4643 // accumulate wastage -- t1 is amount free in tlab
|
|
|
4644 addl(Address(thread_reg, in_bytes(JavaThread::tlab_fast_refill_waste_offset())), t1);
|
|
|
4645 }
|
|
|
4646
|
|
|
4647 // if tlab is currently allocated (top or end != null) then
|
|
|
4648 // fill [top, end + alignment_reserve) with array object
|
|
|
4649 testl (top, top);
|
|
|
4650 jcc(Assembler::zero, do_refill);
|
|
|
4651
|
|
|
4652 // set up the mark word
|
|
|
4653 movl(Address(top, oopDesc::mark_offset_in_bytes()), (int)markOopDesc::prototype()->copy_set_hash(0x2));
|
|
|
4654 // set the length to the remaining space
|
|
|
4655 subl(t1, typeArrayOopDesc::header_size(T_INT));
|
|
|
4656 addl(t1, ThreadLocalAllocBuffer::alignment_reserve());
|
|
|
4657 shll(t1, log2_intptr(HeapWordSize/sizeof(jint)));
|
|
|
4658 movl(Address(top, arrayOopDesc::length_offset_in_bytes()), t1);
|
|
|
4659 // set klass to intArrayKlass
|
|
|
4660 // dubious reloc why not an oop reloc?
|
|
|
4661 movptr(t1, ExternalAddress((address) Universe::intArrayKlassObj_addr()));
|
|
|
4662 movl(Address(top, oopDesc::klass_offset_in_bytes()), t1);
|
|
|
4663
|
|
|
4664 // refill the tlab with an eden allocation
|
|
|
4665 bind(do_refill);
|
|
|
4666 movl(t1, Address(thread_reg, in_bytes(JavaThread::tlab_size_offset())));
|
|
|
4667 shll(t1, LogHeapWordSize);
|
|
|
4668 // add object_size ??
|
|
|
4669 eden_allocate(top, t1, 0, t2, slow_case);
|
|
|
4670
|
|
|
4671 // Check that t1 was preserved in eden_allocate.
|
|
|
4672 #ifdef ASSERT
|
|
|
4673 if (UseTLAB) {
|
|
|
4674 Label ok;
|
|
|
4675 Register tsize = rsi;
|
|
|
4676 assert_different_registers(tsize, thread_reg, t1);
|
|
|
4677 pushl(tsize);
|
|
|
4678 movl(tsize, Address(thread_reg, in_bytes(JavaThread::tlab_size_offset())));
|
|
|
4679 shll(tsize, LogHeapWordSize);
|
|
|
4680 cmpl(t1, tsize);
|
|
|
4681 jcc(Assembler::equal, ok);
|
|
|
4682 stop("assert(t1 != tlab size)");
|
|
|
4683 should_not_reach_here();
|
|
|
4684
|
|
|
4685 bind(ok);
|
|
|
4686 popl(tsize);
|
|
|
4687 }
|
|
|
4688 #endif
|
|
|
4689 movl(Address(thread_reg, in_bytes(JavaThread::tlab_start_offset())), top);
|
|
|
4690 movl(Address(thread_reg, in_bytes(JavaThread::tlab_top_offset())), top);
|
|
|
4691 addl(top, t1);
|
|
|
4692 subl(top, ThreadLocalAllocBuffer::alignment_reserve_in_bytes());
|
|
|
4693 movl(Address(thread_reg, in_bytes(JavaThread::tlab_end_offset())), top);
|
|
|
4694 verify_tlab();
|
|
|
4695 jmp(retry);
|
|
|
4696 }
|
|
|
4697
|
|
|
4698
|
|
|
4699 int MacroAssembler::biased_locking_enter(Register lock_reg, Register obj_reg, Register swap_reg, Register tmp_reg,
|
|
|
4700 bool swap_reg_contains_mark,
|
|
|
4701 Label& done, Label* slow_case,
|
|
|
4702 BiasedLockingCounters* counters) {
|
|
|
4703 assert(UseBiasedLocking, "why call this otherwise?");
|
|
|
4704 assert(swap_reg == rax, "swap_reg must be rax, for cmpxchg");
|
|
|
4705 assert_different_registers(lock_reg, obj_reg, swap_reg);
|
|
|
4706
|
|
|
4707 if (PrintBiasedLockingStatistics && counters == NULL)
|
|
|
4708 counters = BiasedLocking::counters();
|
|
|
4709
|
|
|
4710 bool need_tmp_reg = false;
|
|
|
4711 if (tmp_reg == noreg) {
|
|
|
4712 need_tmp_reg = true;
|
|
|
4713 tmp_reg = lock_reg;
|
|
|
4714 } else {
|
|
|
4715 assert_different_registers(lock_reg, obj_reg, swap_reg, tmp_reg);
|
|
|
4716 }
|
|
|
4717 assert(markOopDesc::age_shift == markOopDesc::lock_bits + markOopDesc::biased_lock_bits, "biased locking makes assumptions about bit layout");
|
|
|
4718 Address mark_addr (obj_reg, oopDesc::mark_offset_in_bytes());
|
|
|
4719 Address klass_addr (obj_reg, oopDesc::klass_offset_in_bytes());
|
|
|
4720 Address saved_mark_addr(lock_reg, 0);
|
|
|
4721
|
|
|
4722 // Biased locking
|
|
|
4723 // See whether the lock is currently biased toward our thread and
|
|
|
4724 // whether the epoch is still valid
|
|
|
4725 // Note that the runtime guarantees sufficient alignment of JavaThread
|
|
|
4726 // pointers to allow age to be placed into low bits
|
|
|
4727 // First check to see whether biasing is even enabled for this object
|
|
|
4728 Label cas_label;
|
|
|
4729 int null_check_offset = -1;
|
|
|
4730 if (!swap_reg_contains_mark) {
|
|
|
4731 null_check_offset = offset();
|
|
|
4732 movl(swap_reg, mark_addr);
|
|
|
4733 }
|
|
|
4734 if (need_tmp_reg) {
|
|
|
4735 pushl(tmp_reg);
|
|
|
4736 }
|
|
|
4737 movl(tmp_reg, swap_reg);
|
|
|
4738 andl(tmp_reg, markOopDesc::biased_lock_mask_in_place);
|
|
|
4739 cmpl(tmp_reg, markOopDesc::biased_lock_pattern);
|
|
|
4740 if (need_tmp_reg) {
|
|
|
4741 popl(tmp_reg);
|
|
|
4742 }
|
|
|
4743 jcc(Assembler::notEqual, cas_label);
|
|
|
4744 // The bias pattern is present in the object's header. Need to check
|
|
|
4745 // whether the bias owner and the epoch are both still current.
|
|
|
4746 // Note that because there is no current thread register on x86 we
|
|
|
4747 // need to store off the mark word we read out of the object to
|
|
|
4748 // avoid reloading it and needing to recheck invariants below. This
|
|
|
4749 // store is unfortunate but it makes the overall code shorter and
|
|
|
4750 // simpler.
|
|
|
4751 movl(saved_mark_addr, swap_reg);
|
|
|
4752 if (need_tmp_reg) {
|
|
|
4753 pushl(tmp_reg);
|
|
|
4754 }
|
|
|
4755 get_thread(tmp_reg);
|
|
|
4756 xorl(swap_reg, tmp_reg);
|
|
|
4757 if (swap_reg_contains_mark) {
|
|
|
4758 null_check_offset = offset();
|
|
|
4759 }
|
|
|
4760 movl(tmp_reg, klass_addr);
|
|
|
4761 xorl(swap_reg, Address(tmp_reg, Klass::prototype_header_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes()));
|
|
|
4762 andl(swap_reg, ~((int) markOopDesc::age_mask_in_place));
|
|
|
4763 if (need_tmp_reg) {
|
|
|
4764 popl(tmp_reg);
|
|
|
4765 }
|
|
|
4766 if (counters != NULL) {
|
|
|
4767 cond_inc32(Assembler::zero,
|
|
|
4768 ExternalAddress((address)counters->biased_lock_entry_count_addr()));
|
|
|
4769 }
|
|
|
4770 jcc(Assembler::equal, done);
|
|
|
4771
|
|
|
4772 Label try_revoke_bias;
|
|
|
4773 Label try_rebias;
|
|
|
4774
|
|
|
4775 // At this point we know that the header has the bias pattern and
|
|
|
4776 // that we are not the bias owner in the current epoch. We need to
|
|
|
4777 // figure out more details about the state of the header in order to
|
|
|
4778 // know what operations can be legally performed on the object's
|
|
|
4779 // header.
|
|
|
4780
|
|
|
4781 // If the low three bits in the xor result aren't clear, that means
|
|
|
4782 // the prototype header is no longer biased and we have to revoke
|
|
|
4783 // the bias on this object.
|
|
|
4784 testl(swap_reg, markOopDesc::biased_lock_mask_in_place);
|
|
|
4785 jcc(Assembler::notZero, try_revoke_bias);
|
|
|
4786
|
|
|
4787 // Biasing is still enabled for this data type. See whether the
|
|
|
4788 // epoch of the current bias is still valid, meaning that the epoch
|
|
|
4789 // bits of the mark word are equal to the epoch bits of the
|
|
|
4790 // prototype header. (Note that the prototype header's epoch bits
|
|
|
4791 // only change at a safepoint.) If not, attempt to rebias the object
|
|
|
4792 // toward the current thread. Note that we must be absolutely sure
|
|
|
4793 // that the current epoch is invalid in order to do this because
|
|
|
4794 // otherwise the manipulations it performs on the mark word are
|
|
|
4795 // illegal.
|
|
|
4796 testl(swap_reg, markOopDesc::epoch_mask_in_place);
|
|
|
4797 jcc(Assembler::notZero, try_rebias);
|
|
|
4798
|
|
|
4799 // The epoch of the current bias is still valid but we know nothing
|
|
|
4800 // about the owner; it might be set or it might be clear. Try to
|
|
|
4801 // acquire the bias of the object using an atomic operation. If this
|
|
|
4802 // fails we will go in to the runtime to revoke the object's bias.
|
|
|
4803 // Note that we first construct the presumed unbiased header so we
|
|
|
4804 // don't accidentally blow away another thread's valid bias.
|
|
|
4805 movl(swap_reg, saved_mark_addr);
|
|
|
4806 andl(swap_reg,
|
|
|
4807 markOopDesc::biased_lock_mask_in_place | markOopDesc::age_mask_in_place | markOopDesc::epoch_mask_in_place);
|
|
|
4808 if (need_tmp_reg) {
|
|
|
4809 pushl(tmp_reg);
|
|
|
4810 }
|
|
|
4811 get_thread(tmp_reg);
|
|
|
4812 orl(tmp_reg, swap_reg);
|
|
|
4813 if (os::is_MP()) {
|
|
|
4814 lock();
|
|
|
4815 }
|
|
|
4816 cmpxchg(tmp_reg, Address(obj_reg, 0));
|
|
|
4817 if (need_tmp_reg) {
|
|
|
4818 popl(tmp_reg);
|
|
|
4819 }
|
|
|
4820 // If the biasing toward our thread failed, this means that
|
|
|
4821 // another thread succeeded in biasing it toward itself and we
|
|
|
4822 // need to revoke that bias. The revocation will occur in the
|
|
|
4823 // interpreter runtime in the slow case.
|
|
|
4824 if (counters != NULL) {
|
|
|
4825 cond_inc32(Assembler::zero,
|
|
|
4826 ExternalAddress((address)counters->anonymously_biased_lock_entry_count_addr()));
|
|
|
4827 }
|
|
|
4828 if (slow_case != NULL) {
|
|
|
4829 jcc(Assembler::notZero, *slow_case);
|
|
|
4830 }
|
|
|
4831 jmp(done);
|
|
|
4832
|
|
|
4833 bind(try_rebias);
|
|
|
4834 // At this point we know the epoch has expired, meaning that the
|
|
|
4835 // current "bias owner", if any, is actually invalid. Under these
|
|
|
4836 // circumstances _only_, we are allowed to use the current header's
|
|
|
4837 // value as the comparison value when doing the cas to acquire the
|
|
|
4838 // bias in the current epoch. In other words, we allow transfer of
|
|
|
4839 // the bias from one thread to another directly in this situation.
|
|
|
4840 //
|
|
|
4841 // FIXME: due to a lack of registers we currently blow away the age
|
|
|
4842 // bits in this situation. Should attempt to preserve them.
|
|
|
4843 if (need_tmp_reg) {
|
|
|
4844 pushl(tmp_reg);
|
|
|
4845 }
|
|
|
4846 get_thread(tmp_reg);
|
|
|
4847 movl(swap_reg, klass_addr);
|
|
|
4848 orl(tmp_reg, Address(swap_reg, Klass::prototype_header_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes()));
|
|
|
4849 movl(swap_reg, saved_mark_addr);
|
|
|
4850 if (os::is_MP()) {
|
|
|
4851 lock();
|
|
|
4852 }
|
|
|
4853 cmpxchg(tmp_reg, Address(obj_reg, 0));
|
|
|
4854 if (need_tmp_reg) {
|
|
|
4855 popl(tmp_reg);
|
|
|
4856 }
|
|
|
4857 // If the biasing toward our thread failed, then another thread
|
|
|
4858 // succeeded in biasing it toward itself and we need to revoke that
|
|
|
4859 // bias. The revocation will occur in the runtime in the slow case.
|
|
|
4860 if (counters != NULL) {
|
|
|
4861 cond_inc32(Assembler::zero,
|
|
|
4862 ExternalAddress((address)counters->rebiased_lock_entry_count_addr()));
|
|
|
4863 }
|
|
|
4864 if (slow_case != NULL) {
|
|
|
4865 jcc(Assembler::notZero, *slow_case);
|
|
|
4866 }
|
|
|
4867 jmp(done);
|
|
|
4868
|
|
|
4869 bind(try_revoke_bias);
|
|
|
4870 // The prototype mark in the klass doesn't have the bias bit set any
|
|
|
4871 // more, indicating that objects of this data type are not supposed
|
|
|
4872 // to be biased any more. We are going to try to reset the mark of
|
|
|
4873 // this object to the prototype value and fall through to the
|
|
|
4874 // CAS-based locking scheme. Note that if our CAS fails, it means
|
|
|
4875 // that another thread raced us for the privilege of revoking the
|
|
|
4876 // bias of this particular object, so it's okay to continue in the
|
|
|
4877 // normal locking code.
|
|
|
4878 //
|
|
|
4879 // FIXME: due to a lack of registers we currently blow away the age
|
|
|
4880 // bits in this situation. Should attempt to preserve them.
|
|
|
4881 movl(swap_reg, saved_mark_addr);
|
|
|
4882 if (need_tmp_reg) {
|
|
|
4883 pushl(tmp_reg);
|
|
|
4884 }
|
|
|
4885 movl(tmp_reg, klass_addr);
|
|
|
4886 movl(tmp_reg, Address(tmp_reg, Klass::prototype_header_offset_in_bytes() + klassOopDesc::klass_part_offset_in_bytes()));
|
|
|
4887 if (os::is_MP()) {
|
|
|
4888 lock();
|
|
|
4889 }
|
|
|
4890 cmpxchg(tmp_reg, Address(obj_reg, 0));
|
|
|
4891 if (need_tmp_reg) {
|
|
|
4892 popl(tmp_reg);
|
|
|
4893 }
|
|
|
4894 // Fall through to the normal CAS-based lock, because no matter what
|
|
|
4895 // the result of the above CAS, some thread must have succeeded in
|
|
|
4896 // removing the bias bit from the object's header.
|
|
|
4897 if (counters != NULL) {
|
|
|
4898 cond_inc32(Assembler::zero,
|
|
|
4899 ExternalAddress((address)counters->revoked_lock_entry_count_addr()));
|
|
|
4900 }
|
|
|
4901
|
|
|
4902 bind(cas_label);
|
|
|
4903
|
|
|
4904 return null_check_offset;
|
|
|
4905 }
|
|
|
4906
|
|
|
4907
|
|
|
4908 void MacroAssembler::biased_locking_exit(Register obj_reg, Register temp_reg, Label& done) {
|
|
|
4909 assert(UseBiasedLocking, "why call this otherwise?");
|
|
|
4910
|
|
|
4911 // Check for biased locking unlock case, which is a no-op
|
|
|
4912 // Note: we do not have to check the thread ID for two reasons.
|
|
|
4913 // First, the interpreter checks for IllegalMonitorStateException at
|
|
|
4914 // a higher level. Second, if the bias was revoked while we held the
|
|
|
4915 // lock, the object could not be rebiased toward another thread, so
|
|
|
4916 // the bias bit would be clear.
|
|
|
4917 movl(temp_reg, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
|
|
|
4918 andl(temp_reg, markOopDesc::biased_lock_mask_in_place);
|
|
|
4919 cmpl(temp_reg, markOopDesc::biased_lock_pattern);
|
|
|
4920 jcc(Assembler::equal, done);
|
|
|
4921 }
|
|
|
4922
|
|
|
4923
|
|
|
4924 Assembler::Condition MacroAssembler::negate_condition(Assembler::Condition cond) {
|
|
|
4925 switch (cond) {
|
|
|
4926 // Note some conditions are synonyms for others
|
|
|
4927 case Assembler::zero: return Assembler::notZero;
|
|
|
4928 case Assembler::notZero: return Assembler::zero;
|
|
|
4929 case Assembler::less: return Assembler::greaterEqual;
|
|
|
4930 case Assembler::lessEqual: return Assembler::greater;
|
|
|
4931 case Assembler::greater: return Assembler::lessEqual;
|
|
|
4932 case Assembler::greaterEqual: return Assembler::less;
|
|
|
4933 case Assembler::below: return Assembler::aboveEqual;
|
|
|
4934 case Assembler::belowEqual: return Assembler::above;
|
|
|
4935 case Assembler::above: return Assembler::belowEqual;
|
|
|
4936 case Assembler::aboveEqual: return Assembler::below;
|
|
|
4937 case Assembler::overflow: return Assembler::noOverflow;
|
|
|
4938 case Assembler::noOverflow: return Assembler::overflow;
|
|
|
4939 case Assembler::negative: return Assembler::positive;
|
|
|
4940 case Assembler::positive: return Assembler::negative;
|
|
|
4941 case Assembler::parity: return Assembler::noParity;
|
|
|
4942 case Assembler::noParity: return Assembler::parity;
|
|
|
4943 }
|
|
|
4944 ShouldNotReachHere(); return Assembler::overflow;
|
|
|
4945 }
|
|
|
4946
|
|
|
4947
|
|
|
4948 void MacroAssembler::cond_inc32(Condition cond, AddressLiteral counter_addr) {
|
|
|
4949 Condition negated_cond = negate_condition(cond);
|
|
|
4950 Label L;
|
|
|
4951 jcc(negated_cond, L);
|
|
|
4952 atomic_incl(counter_addr);
|
|
|
4953 bind(L);
|
|
|
4954 }
|
|
|
4955
|
|
|
4956 void MacroAssembler::atomic_incl(AddressLiteral counter_addr) {
|
|
|
4957 pushfd();
|
|
|
4958 if (os::is_MP())
|
|
|
4959 lock();
|
|
|
4960 increment(counter_addr);
|
|
|
4961 popfd();
|
|
|
4962 }
|
|
|
4963
|
|
|
4964 SkipIfEqual::SkipIfEqual(
|
|
|
4965 MacroAssembler* masm, const bool* flag_addr, bool value) {
|
|
|
4966 _masm = masm;
|
|
|
4967 _masm->cmp8(ExternalAddress((address)flag_addr), value);
|
|
|
4968 _masm->jcc(Assembler::equal, _label);
|
|
|
4969 }
|
|
|
4970
|
|
|
4971 SkipIfEqual::~SkipIfEqual() {
|
|
|
4972 _masm->bind(_label);
|
|
|
4973 }
|
|
|
4974
|
|
|
4975
|
|
|
4976 // Writes to stack successive pages until offset reached to check for
|
|
|
4977 // stack overflow + shadow pages. This clobbers tmp.
|
|
|
4978 void MacroAssembler::bang_stack_size(Register size, Register tmp) {
|
|
|
4979 movl(tmp, rsp);
|
|
|
4980 // Bang stack for total size given plus shadow page size.
|
|
|
4981 // Bang one page at a time because large size can bang beyond yellow and
|
|
|
4982 // red zones.
|
|
|
4983 Label loop;
|
|
|
4984 bind(loop);
|
|
|
4985 movl(Address(tmp, (-os::vm_page_size())), size );
|
|
|
4986 subl(tmp, os::vm_page_size());
|
|
|
4987 subl(size, os::vm_page_size());
|
|
|
4988 jcc(Assembler::greater, loop);
|
|
|
4989
|
|
|
4990 // Bang down shadow pages too.
|
|
|
4991 // The -1 because we already subtracted 1 page.
|
|
|
4992 for (int i = 0; i< StackShadowPages-1; i++) {
|
|
|
4993 movl(Address(tmp, (-i*os::vm_page_size())), size );
|
|
|
4994 }
|
|
|
4995 }
|
