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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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892 int constant_offset = GetBacktrackConstantPoolEntry(); | 892 int constant_offset = GetBacktrackConstantPoolEntry(); |
893 masm_->label_at_put(label, constant_offset); | 893 masm_->label_at_put(label, constant_offset); |
894 // Reading pc-relative is based on the address 8 bytes ahead of | 894 // Reading pc-relative is based on the address 8 bytes ahead of |
895 // the current opcode. | 895 // the current opcode. |
896 unsigned int offset_of_pc_register_read = | 896 unsigned int offset_of_pc_register_read = |
897 masm_->pc_offset() + Assembler::kPcLoadDelta; | 897 masm_->pc_offset() + Assembler::kPcLoadDelta; |
898 int pc_offset_of_constant = | 898 int pc_offset_of_constant = |
899 constant_offset - offset_of_pc_register_read; | 899 constant_offset - offset_of_pc_register_read; |
900 ASSERT(pc_offset_of_constant < 0); | 900 ASSERT(pc_offset_of_constant < 0); |
901 if (is_valid_memory_offset(pc_offset_of_constant)) { | 901 if (is_valid_memory_offset(pc_offset_of_constant)) { |
902 masm_->BlockConstPoolBefore(masm_->pc_offset() + Assembler::kInstrSize); | 902 Assembler::BlockConstPoolScope block_const_pool(masm_); |
903 __ ldr(r0, MemOperand(pc, pc_offset_of_constant)); | 903 __ ldr(r0, MemOperand(pc, pc_offset_of_constant)); |
904 } else { | 904 } else { |
905 // Not a 12-bit offset, so it needs to be loaded from the constant | 905 // Not a 12-bit offset, so it needs to be loaded from the constant |
906 // pool. | 906 // pool. |
907 masm_->BlockConstPoolBefore( | 907 Assembler::BlockConstPoolScope block_const_pool(masm_); |
908 masm_->pc_offset() + 2 * Assembler::kInstrSize); | |
909 __ mov(r0, Operand(pc_offset_of_constant + Assembler::kInstrSize)); | 908 __ mov(r0, Operand(pc_offset_of_constant + Assembler::kInstrSize)); |
910 __ ldr(r0, MemOperand(pc, r0)); | 909 __ ldr(r0, MemOperand(pc, r0)); |
911 } | 910 } |
912 } | 911 } |
913 Push(r0); | 912 Push(r0); |
914 CheckStackLimit(); | 913 CheckStackLimit(); |
915 } | 914 } |
916 | 915 |
917 | 916 |
918 void RegExpMacroAssemblerARM::PushCurrentPosition() { | 917 void RegExpMacroAssemblerARM::PushCurrentPosition() { |
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1178 ExternalReference::address_of_regexp_stack_limit(masm_->isolate()); | 1177 ExternalReference::address_of_regexp_stack_limit(masm_->isolate()); |
1179 __ mov(r0, Operand(stack_limit)); | 1178 __ mov(r0, Operand(stack_limit)); |
1180 __ ldr(r0, MemOperand(r0)); | 1179 __ ldr(r0, MemOperand(r0)); |
1181 __ cmp(backtrack_stackpointer(), Operand(r0)); | 1180 __ cmp(backtrack_stackpointer(), Operand(r0)); |
1182 SafeCall(&stack_overflow_label_, ls); | 1181 SafeCall(&stack_overflow_label_, ls); |
1183 } | 1182 } |
1184 | 1183 |
1185 | 1184 |
1186 void RegExpMacroAssemblerARM::EmitBacktrackConstantPool() { | 1185 void RegExpMacroAssemblerARM::EmitBacktrackConstantPool() { |
1187 __ CheckConstPool(false, false); | 1186 __ CheckConstPool(false, false); |
1188 __ BlockConstPoolBefore( | 1187 Assembler::BlockConstPoolScope block_const_pool(masm_); |
1189 masm_->pc_offset() + kBacktrackConstantPoolSize * Assembler::kInstrSize); | |
1190 backtrack_constant_pool_offset_ = masm_->pc_offset(); | 1188 backtrack_constant_pool_offset_ = masm_->pc_offset(); |
1191 for (int i = 0; i < kBacktrackConstantPoolSize; i++) { | 1189 for (int i = 0; i < kBacktrackConstantPoolSize; i++) { |
1192 __ emit(0); | 1190 __ emit(0); |
1193 } | 1191 } |
1194 | 1192 |
1195 backtrack_constant_pool_capacity_ = kBacktrackConstantPoolSize; | 1193 backtrack_constant_pool_capacity_ = kBacktrackConstantPoolSize; |
1196 } | 1194 } |
1197 | 1195 |
1198 | 1196 |
1199 int RegExpMacroAssemblerARM::GetBacktrackConstantPoolEntry() { | 1197 int RegExpMacroAssemblerARM::GetBacktrackConstantPoolEntry() { |
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1278 __ ldr(pc, MemOperand(sp, stack_alignment, PostIndex)); | 1276 __ ldr(pc, MemOperand(sp, stack_alignment, PostIndex)); |
1279 } | 1277 } |
1280 | 1278 |
1281 #undef __ | 1279 #undef __ |
1282 | 1280 |
1283 #endif // V8_INTERPRETED_REGEXP | 1281 #endif // V8_INTERPRETED_REGEXP |
1284 | 1282 |
1285 }} // namespace v8::internal | 1283 }} // namespace v8::internal |
1286 | 1284 |
1287 #endif // V8_TARGET_ARCH_ARM | 1285 #endif // V8_TARGET_ARCH_ARM |
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