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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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| 954 // an instruction or relocation information. | 954 // an instruction or relocation information. |
| 955 inline bool buffer_overflow() const { | 955 inline bool buffer_overflow() const { |
| 956 return pc_ >= reloc_info_writer.pos() - kGap; | 956 return pc_ >= reloc_info_writer.pos() - kGap; |
| 957 } | 957 } |
| 958 | 958 |
| 959 // Get the number of bytes available in the buffer. | 959 // Get the number of bytes available in the buffer. |
| 960 inline int available_space() const { return reloc_info_writer.pos() - pc_; } | 960 inline int available_space() const { return reloc_info_writer.pos() - pc_; } |
| 961 | 961 |
| 962 static bool IsNop(Address addr); | 962 static bool IsNop(Address addr); |
| 963 | 963 |
| 964 PositionsRecorder* positions_recorder() { return &positions_recorder_; } | 964 AssemblerPositionsRecorder* positions_recorder() { |
| 965 return &positions_recorder_; |
| 966 } |
| 965 | 967 |
| 966 int relocation_writer_size() { | 968 int relocation_writer_size() { |
| 967 return (buffer_ + buffer_size_) - reloc_info_writer.pos(); | 969 return (buffer_ + buffer_size_) - reloc_info_writer.pos(); |
| 968 } | 970 } |
| 969 | 971 |
| 970 // Avoid overflows for displacements etc. | 972 // Avoid overflows for displacements etc. |
| 971 static const int kMaximalBufferSize = 512*MB; | 973 static const int kMaximalBufferSize = 512*MB; |
| 972 | 974 |
| 973 byte byte_at(int pos) { return buffer_[pos]; } | 975 byte byte_at(int pos) { return buffer_[pos]; } |
| 974 void set_byte_at(int pos, byte value) { buffer_[pos] = value; } | 976 void set_byte_at(int pos, byte value) { buffer_[pos] = value; } |
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| 1041 friend class EnsureSpace; | 1043 friend class EnsureSpace; |
| 1042 | 1044 |
| 1043 // Internal reference positions, required for (potential) patching in | 1045 // Internal reference positions, required for (potential) patching in |
| 1044 // GrowBuffer(); contains only those internal references whose labels | 1046 // GrowBuffer(); contains only those internal references whose labels |
| 1045 // are already bound. | 1047 // are already bound. |
| 1046 std::deque<int> internal_reference_positions_; | 1048 std::deque<int> internal_reference_positions_; |
| 1047 | 1049 |
| 1048 // code generation | 1050 // code generation |
| 1049 RelocInfoWriter reloc_info_writer; | 1051 RelocInfoWriter reloc_info_writer; |
| 1050 | 1052 |
| 1051 PositionsRecorder positions_recorder_; | 1053 AssemblerPositionsRecorder positions_recorder_; |
| 1052 friend class PositionsRecorder; | 1054 friend class AssemblerPositionsRecorder; |
| 1053 }; | 1055 }; |
| 1054 | 1056 |
| 1055 | 1057 |
| 1056 // Helper class that ensures that there is enough space for generating | 1058 // Helper class that ensures that there is enough space for generating |
| 1057 // instructions and relocation information. The constructor makes | 1059 // instructions and relocation information. The constructor makes |
| 1058 // sure that there is enough space and (in debug mode) the destructor | 1060 // sure that there is enough space and (in debug mode) the destructor |
| 1059 // checks that we did not generate too much. | 1061 // checks that we did not generate too much. |
| 1060 class EnsureSpace BASE_EMBEDDED { | 1062 class EnsureSpace BASE_EMBEDDED { |
| 1061 public: | 1063 public: |
| 1062 explicit EnsureSpace(Assembler* assembler) : assembler_(assembler) { | 1064 explicit EnsureSpace(Assembler* assembler) : assembler_(assembler) { |
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| 1077 Assembler* assembler_; | 1079 Assembler* assembler_; |
| 1078 #ifdef DEBUG | 1080 #ifdef DEBUG |
| 1079 int space_before_; | 1081 int space_before_; |
| 1080 #endif | 1082 #endif |
| 1081 }; | 1083 }; |
| 1082 | 1084 |
| 1083 } // namespace internal | 1085 } // namespace internal |
| 1084 } // namespace v8 | 1086 } // namespace v8 |
| 1085 | 1087 |
| 1086 #endif // V8_X87_ASSEMBLER_X87_H_ | 1088 #endif // V8_X87_ASSEMBLER_X87_H_ |
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