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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 are | 5 // modification, are permitted provided that the following conditions are |
6 // met: | 6 // 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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457 static const int kCallTargetSize = kPointerSize; | 457 static const int kCallTargetSize = kPointerSize; |
458 static const int kExternalTargetSize = kPointerSize; | 458 static const int kExternalTargetSize = kPointerSize; |
459 | 459 |
460 // Distance between the address of the code target in the call instruction | 460 // Distance between the address of the code target in the call instruction |
461 // and the return address | 461 // and the return address |
462 static const int kCallTargetAddressOffset = kPointerSize; | 462 static const int kCallTargetAddressOffset = kPointerSize; |
463 // Distance between start of patched return sequence and the emitted address | 463 // Distance between start of patched return sequence and the emitted address |
464 // to jump to. | 464 // to jump to. |
465 static const int kPatchReturnSequenceAddressOffset = 1; // JMP imm32. | 465 static const int kPatchReturnSequenceAddressOffset = 1; // JMP imm32. |
466 | 466 |
| 467 static const int kCallInstructionLength = 5; |
| 468 static const int kJSReturnSequenceLength = 6; |
467 | 469 |
468 // --------------------------------------------------------------------------- | 470 // --------------------------------------------------------------------------- |
469 // Code generation | 471 // Code generation |
470 // | 472 // |
471 // - function names correspond one-to-one to ia32 instruction mnemonics | 473 // - function names correspond one-to-one to ia32 instruction mnemonics |
472 // - unless specified otherwise, instructions operate on 32bit operands | 474 // - unless specified otherwise, instructions operate on 32bit operands |
473 // - instructions on 8bit (byte) operands/registers have a trailing '_b' | 475 // - instructions on 8bit (byte) operands/registers have a trailing '_b' |
474 // - instructions on 16bit (word) operands/registers have a trailing '_w' | 476 // - instructions on 16bit (word) operands/registers have a trailing '_w' |
475 // - naming conflicts with C++ keywords are resolved via a trailing '_' | 477 // - naming conflicts with C++ keywords are resolved via a trailing '_' |
476 | 478 |
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892 private: | 894 private: |
893 Assembler* assembler_; | 895 Assembler* assembler_; |
894 #ifdef DEBUG | 896 #ifdef DEBUG |
895 int space_before_; | 897 int space_before_; |
896 #endif | 898 #endif |
897 }; | 899 }; |
898 | 900 |
899 } } // namespace v8::internal | 901 } } // namespace v8::internal |
900 | 902 |
901 #endif // V8_IA32_ASSEMBLER_IA32_H_ | 903 #endif // V8_IA32_ASSEMBLER_IA32_H_ |
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