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1 // Copyright 2009 the V8 project authors. All rights reserved. | 1 // Copyright 2009 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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138 } | 138 } |
139 | 139 |
140 | 140 |
141 int RegExpMacroAssemblerX64::stack_limit_slack() { | 141 int RegExpMacroAssemblerX64::stack_limit_slack() { |
142 return RegExpStack::kStackLimitSlack; | 142 return RegExpStack::kStackLimitSlack; |
143 } | 143 } |
144 | 144 |
145 | 145 |
146 void RegExpMacroAssemblerX64::AdvanceCurrentPosition(int by) { | 146 void RegExpMacroAssemblerX64::AdvanceCurrentPosition(int by) { |
147 if (by != 0) { | 147 if (by != 0) { |
148 Label inside_string; | |
149 __ addq(rdi, Immediate(by * char_size())); | 148 __ addq(rdi, Immediate(by * char_size())); |
150 } | 149 } |
151 } | 150 } |
152 | 151 |
153 | 152 |
154 void RegExpMacroAssemblerX64::AdvanceRegister(int reg, int by) { | 153 void RegExpMacroAssemblerX64::AdvanceRegister(int reg, int by) { |
155 ASSERT(reg >= 0); | 154 ASSERT(reg >= 0); |
156 ASSERT(reg < num_registers_); | 155 ASSERT(reg < num_registers_); |
157 if (by != 0) { | 156 if (by != 0) { |
158 __ addq(register_location(reg), Immediate(by)); | 157 __ addq(register_location(reg), Immediate(by)); |
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1046 __ movq(rdi, register_location(reg)); | 1045 __ movq(rdi, register_location(reg)); |
1047 } | 1046 } |
1048 | 1047 |
1049 | 1048 |
1050 void RegExpMacroAssemblerX64::ReadStackPointerFromRegister(int reg) { | 1049 void RegExpMacroAssemblerX64::ReadStackPointerFromRegister(int reg) { |
1051 __ movq(backtrack_stackpointer(), register_location(reg)); | 1050 __ movq(backtrack_stackpointer(), register_location(reg)); |
1052 __ addq(backtrack_stackpointer(), Operand(rbp, kStackHighEnd)); | 1051 __ addq(backtrack_stackpointer(), Operand(rbp, kStackHighEnd)); |
1053 } | 1052 } |
1054 | 1053 |
1055 | 1054 |
| 1055 void RegExpMacroAssemblerX64::SetCurrentPositionFromEnd(int by) { |
| 1056 NearLabel after_position; |
| 1057 __ cmpq(rdi, Immediate(-by * char_size())); |
| 1058 __ j(above_equal, &after_position); |
| 1059 __ movq(rdi, Immediate(-by * char_size())); |
| 1060 // On RegExp code entry (where this operation is used), the character before |
| 1061 // the current position is expected to be already loaded. |
| 1062 // We have advenced the position, so it's safe to read backwards. |
| 1063 LoadCurrentCharacterUnchecked(-1, 1); |
| 1064 __ bind(&after_position); |
| 1065 } |
| 1066 |
| 1067 |
1056 void RegExpMacroAssemblerX64::SetRegister(int register_index, int to) { | 1068 void RegExpMacroAssemblerX64::SetRegister(int register_index, int to) { |
1057 ASSERT(register_index >= num_saved_registers_); // Reserved for positions! | 1069 ASSERT(register_index >= num_saved_registers_); // Reserved for positions! |
1058 __ movq(register_location(register_index), Immediate(to)); | 1070 __ movq(register_location(register_index), Immediate(to)); |
1059 } | 1071 } |
1060 | 1072 |
1061 | 1073 |
1062 void RegExpMacroAssemblerX64::Succeed() { | 1074 void RegExpMacroAssemblerX64::Succeed() { |
1063 __ jmp(&success_label_); | 1075 __ jmp(&success_label_); |
1064 } | 1076 } |
1065 | 1077 |
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1363 } | 1375 } |
1364 } | 1376 } |
1365 | 1377 |
1366 #undef __ | 1378 #undef __ |
1367 | 1379 |
1368 #endif // V8_INTERPRETED_REGEXP | 1380 #endif // V8_INTERPRETED_REGEXP |
1369 | 1381 |
1370 }} // namespace v8::internal | 1382 }} // namespace v8::internal |
1371 | 1383 |
1372 #endif // V8_TARGET_ARCH_X64 | 1384 #endif // V8_TARGET_ARCH_X64 |
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