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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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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919 __ movq(rbx, Operand(rbp, kRegisterOutput)); | 919 __ movq(rbx, Operand(rbp, kRegisterOutput)); |
920 __ movq(rcx, Operand(rbp, kInputEnd)); | 920 __ movq(rcx, Operand(rbp, kInputEnd)); |
921 __ subq(rcx, Operand(rbp, kInputStart)); | 921 __ subq(rcx, Operand(rbp, kInputStart)); |
922 if (mode_ == UC16) { | 922 if (mode_ == UC16) { |
923 __ lea(rcx, Operand(rcx, rdx, times_2, 0)); | 923 __ lea(rcx, Operand(rcx, rdx, times_2, 0)); |
924 } else { | 924 } else { |
925 __ addq(rcx, rdx); | 925 __ addq(rcx, rdx); |
926 } | 926 } |
927 for (int i = 0; i < num_saved_registers_; i++) { | 927 for (int i = 0; i < num_saved_registers_; i++) { |
928 __ movq(rax, register_location(i)); | 928 __ movq(rax, register_location(i)); |
929 if (i == 0 && global()) { | 929 if (i == 0 && global_with_zero_length_match()) { |
930 // Keep capture start in rdx for the zero-length check later. | 930 // Keep capture start in rdx for the zero-length check later. |
931 __ movq(rdx, rax); | 931 __ movq(rdx, rax); |
932 } | 932 } |
933 __ addq(rax, rcx); // Convert to index from start, not end. | 933 __ addq(rax, rcx); // Convert to index from start, not end. |
934 if (mode_ == UC16) { | 934 if (mode_ == UC16) { |
935 __ sar(rax, Immediate(1)); // Convert byte index to character index. | 935 __ sar(rax, Immediate(1)); // Convert byte index to character index. |
936 } | 936 } |
937 __ movl(Operand(rbx, i * kIntSize), rax); | 937 __ movl(Operand(rbx, i * kIntSize), rax); |
938 } | 938 } |
939 } | 939 } |
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951 __ j(less, &exit_label_); | 951 __ j(less, &exit_label_); |
952 | 952 |
953 __ movq(Operand(rbp, kNumOutputRegisters), rcx); | 953 __ movq(Operand(rbp, kNumOutputRegisters), rcx); |
954 // Advance the location for output. | 954 // Advance the location for output. |
955 __ addq(Operand(rbp, kRegisterOutput), | 955 __ addq(Operand(rbp, kRegisterOutput), |
956 Immediate(num_saved_registers_ * kIntSize)); | 956 Immediate(num_saved_registers_ * kIntSize)); |
957 | 957 |
958 // Prepare rax to initialize registers with its value in the next run. | 958 // Prepare rax to initialize registers with its value in the next run. |
959 __ movq(rax, Operand(rbp, kInputStartMinusOne)); | 959 __ movq(rax, Operand(rbp, kInputStartMinusOne)); |
960 | 960 |
961 // Special case for zero-length matches. | 961 if (global_with_zero_length_match()) { |
962 // rdx: capture start index | 962 // Special case for zero-length matches. |
963 __ cmpq(rdi, rdx); | 963 // rdx: capture start index |
964 // Not a zero-length match, restart. | 964 __ cmpq(rdi, rdx); |
965 __ j(not_equal, &load_char_start_regexp); | 965 // Not a zero-length match, restart. |
966 // rdi (offset from the end) is zero if we already reached the end. | 966 __ j(not_equal, &load_char_start_regexp); |
967 __ testq(rdi, rdi); | 967 // rdi (offset from the end) is zero if we already reached the end. |
968 __ j(zero, &exit_label_, Label::kNear); | 968 __ testq(rdi, rdi); |
969 // Advance current position after a zero-length match. | 969 __ j(zero, &exit_label_, Label::kNear); |
970 if (mode_ == UC16) { | 970 // Advance current position after a zero-length match. |
971 __ addq(rdi, Immediate(2)); | 971 if (mode_ == UC16) { |
972 } else { | 972 __ addq(rdi, Immediate(2)); |
973 __ incq(rdi); | 973 } else { |
| 974 __ incq(rdi); |
| 975 } |
974 } | 976 } |
| 977 |
975 __ jmp(&load_char_start_regexp); | 978 __ jmp(&load_char_start_regexp); |
976 } else { | 979 } else { |
977 __ movq(rax, Immediate(SUCCESS)); | 980 __ movq(rax, Immediate(SUCCESS)); |
978 } | 981 } |
979 } | 982 } |
980 | 983 |
981 __ bind(&exit_label_); | 984 __ bind(&exit_label_); |
982 if (global()) { | 985 if (global()) { |
983 // Return the number of successful captures. | 986 // Return the number of successful captures. |
984 __ movq(rax, Operand(rbp, kSuccessfulCaptures)); | 987 __ movq(rax, Operand(rbp, kSuccessfulCaptures)); |
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1531 } | 1534 } |
1532 } | 1535 } |
1533 | 1536 |
1534 #undef __ | 1537 #undef __ |
1535 | 1538 |
1536 #endif // V8_INTERPRETED_REGEXP | 1539 #endif // V8_INTERPRETED_REGEXP |
1537 | 1540 |
1538 }} // namespace v8::internal | 1541 }} // namespace v8::internal |
1539 | 1542 |
1540 #endif // V8_TARGET_ARCH_X64 | 1543 #endif // V8_TARGET_ARCH_X64 |
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