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1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 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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530 #endif | 530 #endif |
531 }; | 531 }; |
532 | 532 |
533 | 533 |
534 class StringStubBase: public CodeStub { | 534 class StringStubBase: public CodeStub { |
535 public: | 535 public: |
536 // Generate code for copying characters using a simple loop. This should only | 536 // Generate code for copying characters using a simple loop. This should only |
537 // be used in places where the number of characters is small and the | 537 // be used in places where the number of characters is small and the |
538 // additional setup and checking in GenerateCopyCharactersLong adds too much | 538 // additional setup and checking in GenerateCopyCharactersLong adds too much |
539 // overhead. Copying of overlapping regions is not supported. | 539 // overhead. Copying of overlapping regions is not supported. |
| 540 // Dest register ends at the position after the last character written. |
540 void GenerateCopyCharacters(MacroAssembler* masm, | 541 void GenerateCopyCharacters(MacroAssembler* masm, |
541 Register dest, | 542 Register dest, |
542 Register src, | 543 Register src, |
543 Register count, | 544 Register count, |
544 Register scratch, | 545 Register scratch, |
545 bool ascii); | 546 bool ascii); |
546 | 547 |
547 // Generate code for copying a large number of characters. This function | 548 // Generate code for copying a large number of characters. This function |
548 // is allowed to spend extra time setting up conditions to make copying | 549 // is allowed to spend extra time setting up conditions to make copying |
549 // faster. Copying of overlapping regions is not supported. | 550 // faster. Copying of overlapping regions is not supported. |
| 551 // Dest register ends at the position after the last character written. |
550 void GenerateCopyCharactersLong(MacroAssembler* masm, | 552 void GenerateCopyCharactersLong(MacroAssembler* masm, |
551 Register dest, | 553 Register dest, |
552 Register src, | 554 Register src, |
553 Register count, | 555 Register count, |
554 Register scratch1, | 556 Register scratch1, |
555 Register scratch2, | 557 Register scratch2, |
556 Register scratch3, | 558 Register scratch3, |
557 Register scratch4, | 559 Register scratch4, |
558 Register scratch5, | 560 Register scratch5, |
559 int flags); | 561 int flags); |
560 }; | 562 }; |
561 | 563 |
562 | 564 |
563 // Flag that indicates how to generate code for the stub StringAddStub. | 565 // Flag that indicates how to generate code for the stub StringAddStub. |
564 enum StringAddFlags { | 566 enum StringAddFlags { |
565 NO_STRING_ADD_FLAGS = 0, | 567 NO_STRING_ADD_FLAGS = 0, |
566 NO_STRING_CHECK_IN_STUB = 1 << 0 // Omit string check in stub. | 568 NO_STRING_CHECK_IN_STUB = 1 << 0 // Omit string check in stub. |
567 }; | 569 }; |
568 | 570 |
569 | 571 |
| 572 class StringAddStub: public StringStubBase { |
| 573 public: |
| 574 explicit StringAddStub(StringAddFlags flags) { |
| 575 string_check_ = ((flags & NO_STRING_CHECK_IN_STUB) == 0); |
| 576 } |
| 577 |
| 578 private: |
| 579 Major MajorKey() { return StringAdd; } |
| 580 int MinorKey() { return string_check_ ? 0 : 1; } |
| 581 |
| 582 void Generate(MacroAssembler* masm); |
| 583 |
| 584 // Should the stub check whether arguments are strings? |
| 585 bool string_check_; |
| 586 }; |
| 587 |
| 588 |
570 class SubStringStub: public StringStubBase { | 589 class SubStringStub: public StringStubBase { |
571 public: | 590 public: |
572 SubStringStub() {} | 591 SubStringStub() {} |
573 | 592 |
574 private: | 593 private: |
575 Major MajorKey() { return SubString; } | 594 Major MajorKey() { return SubString; } |
576 int MinorKey() { return 0; } | 595 int MinorKey() { return 0; } |
577 | 596 |
578 void Generate(MacroAssembler* masm); | 597 void Generate(MacroAssembler* masm); |
579 }; | 598 }; |
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598 Major MajorKey() { return StringCompare; } | 617 Major MajorKey() { return StringCompare; } |
599 int MinorKey() { return 0; } | 618 int MinorKey() { return 0; } |
600 | 619 |
601 void Generate(MacroAssembler* masm); | 620 void Generate(MacroAssembler* masm); |
602 }; | 621 }; |
603 | 622 |
604 | 623 |
605 } } // namespace v8::internal | 624 } } // namespace v8::internal |
606 | 625 |
607 #endif // V8_ARM_CODEGEN_ARM_H_ | 626 #endif // V8_ARM_CODEGEN_ARM_H_ |
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