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1 // Copyright (c) 1994-2006 Sun Microsystems Inc. | 1 // Copyright (c) 1994-2006 Sun Microsystems Inc. |
2 // All Rights Reserved. | 2 // All Rights Reserved. |
3 // | 3 // |
4 // Redistribution and use in source and binary forms, with or without | 4 // Redistribution and use in source and binary forms, with or without |
5 // modification, are permitted provided that the following conditions | 5 // modification, are permitted provided that the following conditions |
6 // are met: | 6 // are met: |
7 // | 7 // |
8 // - Redistributions of source code must retain the above copyright notice, | 8 // - Redistributions of source code must retain the above copyright notice, |
9 // this list of conditions and the following disclaimer. | 9 // this list of conditions and the following disclaimer. |
10 // | 10 // |
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642 // buffer, and buffer_size determines the initial buffer size. The buffer is | 642 // buffer, and buffer_size determines the initial buffer size. The buffer is |
643 // owned by the assembler and deallocated upon destruction of the assembler. | 643 // owned by the assembler and deallocated upon destruction of the assembler. |
644 // | 644 // |
645 // If the provided buffer is not NULL, the assembler uses the provided buffer | 645 // If the provided buffer is not NULL, the assembler uses the provided buffer |
646 // for code generation and assumes its size to be buffer_size. If the buffer | 646 // for code generation and assumes its size to be buffer_size. If the buffer |
647 // is too small, a fatal error occurs. No deallocation of the buffer is done | 647 // is too small, a fatal error occurs. No deallocation of the buffer is done |
648 // upon destruction of the assembler. | 648 // upon destruction of the assembler. |
649 Assembler(Isolate* isolate, void* buffer, int buffer_size); | 649 Assembler(Isolate* isolate, void* buffer, int buffer_size); |
650 ~Assembler(); | 650 ~Assembler(); |
651 | 651 |
652 // Overrides the default provided by FLAG_debug_code. | |
653 void set_emit_debug_code(bool value) { emit_debug_code_ = value; } | |
654 | |
655 // GetCode emits any pending (non-emitted) code and fills the descriptor | 652 // GetCode emits any pending (non-emitted) code and fills the descriptor |
656 // desc. GetCode() is idempotent; it returns the same result if no other | 653 // desc. GetCode() is idempotent; it returns the same result if no other |
657 // Assembler functions are invoked in between GetCode() calls. | 654 // Assembler functions are invoked in between GetCode() calls. |
658 void GetCode(CodeDesc* desc); | 655 void GetCode(CodeDesc* desc); |
659 | 656 |
660 // Label operations & relative jumps (PPUM Appendix D) | 657 // Label operations & relative jumps (PPUM Appendix D) |
661 // | 658 // |
662 // Takes a branch opcode (cc) and a label (L) and generates | 659 // Takes a branch opcode (cc) and a label (L) and generates |
663 // either a backward branch or a forward branch and links it | 660 // either a backward branch or a forward branch and links it |
664 // to the label fixup chain. Usage: | 661 // to the label fixup chain. Usage: |
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1331 | 1328 |
1332 // Check if is time to emit a constant pool. | 1329 // Check if is time to emit a constant pool. |
1333 void CheckConstPool(bool force_emit, bool require_jump); | 1330 void CheckConstPool(bool force_emit, bool require_jump); |
1334 | 1331 |
1335 protected: | 1332 protected: |
1336 // Relocation for a type-recording IC has the AST id added to it. This | 1333 // Relocation for a type-recording IC has the AST id added to it. This |
1337 // member variable is a way to pass the information from the call site to | 1334 // member variable is a way to pass the information from the call site to |
1338 // the relocation info. | 1335 // the relocation info. |
1339 TypeFeedbackId recorded_ast_id_; | 1336 TypeFeedbackId recorded_ast_id_; |
1340 | 1337 |
1341 bool emit_debug_code() const { return emit_debug_code_; } | |
1342 | |
1343 int buffer_space() const { return reloc_info_writer.pos() - pc_; } | 1338 int buffer_space() const { return reloc_info_writer.pos() - pc_; } |
1344 | 1339 |
1345 // Decode branch instruction at pos and return branch target pos | 1340 // Decode branch instruction at pos and return branch target pos |
1346 int target_at(int pos); | 1341 int target_at(int pos); |
1347 | 1342 |
1348 // Patch branch instruction at pos to branch to given branch target pos | 1343 // Patch branch instruction at pos to branch to given branch target pos |
1349 void target_at_put(int pos, int target_pos); | 1344 void target_at_put(int pos, int target_pos); |
1350 | 1345 |
1351 // Prevent contant pool emission until EndBlockConstPool is called. | 1346 // Prevent contant pool emission until EndBlockConstPool is called. |
1352 // Call to this function can be nested but must be followed by an equal | 1347 // Call to this function can be nested but must be followed by an equal |
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1483 // Record reloc info for current pc_ | 1478 // Record reloc info for current pc_ |
1484 void RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data = 0, | 1479 void RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data = 0, |
1485 UseConstantPoolMode mode = USE_CONSTANT_POOL); | 1480 UseConstantPoolMode mode = USE_CONSTANT_POOL); |
1486 | 1481 |
1487 friend class RegExpMacroAssemblerARM; | 1482 friend class RegExpMacroAssemblerARM; |
1488 friend class RelocInfo; | 1483 friend class RelocInfo; |
1489 friend class CodePatcher; | 1484 friend class CodePatcher; |
1490 friend class BlockConstPoolScope; | 1485 friend class BlockConstPoolScope; |
1491 | 1486 |
1492 PositionsRecorder positions_recorder_; | 1487 PositionsRecorder positions_recorder_; |
1493 | |
1494 bool emit_debug_code_; | |
1495 | |
1496 friend class PositionsRecorder; | 1488 friend class PositionsRecorder; |
1497 friend class EnsureSpace; | 1489 friend class EnsureSpace; |
1498 }; | 1490 }; |
1499 | 1491 |
1500 | 1492 |
1501 class EnsureSpace BASE_EMBEDDED { | 1493 class EnsureSpace BASE_EMBEDDED { |
1502 public: | 1494 public: |
1503 explicit EnsureSpace(Assembler* assembler) { | 1495 explicit EnsureSpace(Assembler* assembler) { |
1504 assembler->CheckBuffer(); | 1496 assembler->CheckBuffer(); |
1505 } | 1497 } |
1506 }; | 1498 }; |
1507 | 1499 |
1508 | 1500 |
1509 } } // namespace v8::internal | 1501 } } // namespace v8::internal |
1510 | 1502 |
1511 #endif // V8_ARM_ASSEMBLER_ARM_H_ | 1503 #endif // V8_ARM_ASSEMBLER_ARM_H_ |
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