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| 1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 the V8 project authors. All rights reserved. |
| 2 | 2 |
| 3 // A light-weight assembler for the Regexp2000 byte code. | 3 // A light-weight assembler for the Regexp2000 byte code. |
| 4 | 4 |
| 5 #ifndef V8_ASSEMBLER_RE2K_H_ | 5 #ifndef V8_ASSEMBLER_RE2K_H_ |
| 6 #define V8_ASSEMBLER_RE2K_H_ | 6 #define V8_ASSEMBLER_RE2K_H_ |
| 7 | 7 |
| 8 namespace v8 { namespace internal { | 8 namespace v8 { namespace internal { |
| 9 | 9 |
| 10 | 10 |
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| 53 void GoTo(Label* l); | 53 void GoTo(Label* l); |
| 54 | 54 |
| 55 // Loads current char into a machine register. Jumps to the label if we | 55 // Loads current char into a machine register. Jumps to the label if we |
| 56 // reached the end of the subject string. Fall through otherwise. | 56 // reached the end of the subject string. Fall through otherwise. |
| 57 void LoadCurrentChar(int cp_offset, Label* on_end); | 57 void LoadCurrentChar(int cp_offset, Label* on_end); |
| 58 | 58 |
| 59 // Checks current char register against a singleton. | 59 // Checks current char register against a singleton. |
| 60 void CheckChar(uc16 c, Label* on_mismatch); | 60 void CheckChar(uc16 c, Label* on_mismatch); |
| 61 void CheckNotChar(uc16 c, Label* on_match); | 61 void CheckNotChar(uc16 c, Label* on_match); |
| 62 | 62 |
| 63 // Checks current char register against a range. | 63 // Used to check current char register against a range. |
| 64 void CheckRange(uc16 start, uc16 end, Label* on_mismatch); | 64 void CheckCharacterLT(uc16 limit, Label* on_less); |
| 65 void CheckNotRange(uc16 start, uc16 end, Label* on_match); | 65 void CheckCharacterGT(uc16 limit, Label* on_greater); |
| 66 | 66 |
| 67 // Checks current position (plus optional offset) for a match against a | 67 // Checks current position for a match against a |
| 68 // previous capture. Advances current position by the length of the capture | 68 // previous capture. Advances current position by the length of the capture |
| 69 // iff it matches. The capture is stored in a given register and the | 69 // iff it matches. The capture is stored in a given register and the |
| 70 // the register after. If a register contains -1 then the other register | 70 // the register after. If a register contains -1 then the other register |
| 71 // mush always contain -1 and the on_mismatch label will never be called. | 71 // mush always contain -1 and the on_mismatch label will never be called. |
| 72 void CheckBackref(int capture_index, Label* on_mismatch); | 72 void CheckBackref(int capture_index, Label* on_mismatch); |
| 73 | 73 |
| 74 // Checks a register for strictly-less-than or greater-than-or-equal. | 74 // Checks a register for strictly-less-than or greater-than-or-equal. |
| 75 void CheckRegisterLT(int reg_index, uint16_t vs, Label* on_less_than); | 75 void CheckRegisterLT(int reg_index, uint16_t vs, Label* on_less_than); |
| 76 void CheckRegisterGE(int reg_index, uint16_t vs, Label* on_greater_equal); | 76 void CheckRegisterGE(int reg_index, uint16_t vs, Label* on_greater_equal); |
| 77 | 77 |
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| 115 | 115 |
| 116 inline void CheckRegister(int byte_code, | 116 inline void CheckRegister(int byte_code, |
| 117 int reg_index, | 117 int reg_index, |
| 118 uint16_t vs, | 118 uint16_t vs, |
| 119 Label* on_true); | 119 Label* on_true); |
| 120 // Code generation. | 120 // Code generation. |
| 121 int pc_; // The program counter; moves forward. | 121 int pc_; // The program counter; moves forward. |
| 122 | 122 |
| 123 // True if the assembler owns the buffer, false if buffer is external. | 123 // True if the assembler owns the buffer, false if buffer is external. |
| 124 bool own_buffer_; | 124 bool own_buffer_; |
| 125 |
| 126 void Expand(); |
| 125 }; | 127 }; |
| 126 | 128 |
| 127 | 129 |
| 128 } } // namespace v8::internal | 130 } } // namespace v8::internal |
| 129 | 131 |
| 130 #endif // V8_ASSEMBLER_RE2K_H_ | 132 #endif // V8_ASSEMBLER_RE2K_H_ |
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