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Side by Side Diff: src/mips/assembler-mips.h

Issue 934623003: Revert of MIPS: Fix 'Assembler support for internal references.' (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 10 months ago
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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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31 // The original source code covered by the above license above has been 31 // The original source code covered by the above license above has been
32 // modified significantly by Google Inc. 32 // modified significantly by Google Inc.
33 // Copyright 2012 the V8 project authors. All rights reserved. 33 // Copyright 2012 the V8 project authors. All rights reserved.
34 34
35 35
36 #ifndef V8_MIPS_ASSEMBLER_MIPS_H_ 36 #ifndef V8_MIPS_ASSEMBLER_MIPS_H_
37 #define V8_MIPS_ASSEMBLER_MIPS_H_ 37 #define V8_MIPS_ASSEMBLER_MIPS_H_
38 38
39 #include <stdio.h> 39 #include <stdio.h>
40 40
41 #include <tr1/unordered_set>
42
43 #include "src/assembler.h" 41 #include "src/assembler.h"
44 #include "src/mips/constants-mips.h" 42 #include "src/mips/constants-mips.h"
45 #include "src/serialize.h" 43 #include "src/serialize.h"
46 44
47 namespace v8 { 45 namespace v8 {
48 namespace internal { 46 namespace internal {
49 47
50 // CPU Registers. 48 // CPU Registers.
51 // 49 //
52 // 1) We would prefer to use an enum, but enum values are assignment- 50 // 1) We would prefer to use an enum, but enum values are assignment-
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1016 1014
1017 // Record a comment relocation entry that can be used by a disassembler. 1015 // Record a comment relocation entry that can be used by a disassembler.
1018 // Use --code-comments to enable. 1016 // Use --code-comments to enable.
1019 void RecordComment(const char* msg); 1017 void RecordComment(const char* msg);
1020 1018
1021 // Record a deoptimization reason that can be used by a log or cpu profiler. 1019 // Record a deoptimization reason that can be used by a log or cpu profiler.
1022 // Use --trace-deopt to enable. 1020 // Use --trace-deopt to enable.
1023 void RecordDeoptReason(const int reason, const int raw_position); 1021 void RecordDeoptReason(const int reason, const int raw_position);
1024 1022
1025 1023
1026 static int RelocateInternalReference(RelocInfo::Mode rmode, byte* pc, 1024 static int RelocateInternalReference(byte* pc, intptr_t pc_delta);
1027 intptr_t pc_delta);
1028 1025
1029 // Writes a single byte or word of data in the code stream. Used for 1026 // Writes a single byte or word of data in the code stream. Used for
1030 // inline tables, e.g., jump-tables. 1027 // inline tables, e.g., jump-tables.
1031 void db(uint8_t data); 1028 void db(uint8_t data);
1032 void dd(uint32_t data); 1029 void dd(uint32_t data);
1033 void dd(Label* label); 1030 void dd(Label* label);
1034 1031
1035 // Emits the address of the code stub's first instruction. 1032 // Emits the address of the code stub's first instruction.
1036 void emit_code_stub_address(Code* stub); 1033 void emit_code_stub_address(Code* stub);
1037 1034
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1122 1119
1123 protected: 1120 protected:
1124 // Relocation for a type-recording IC has the AST id added to it. This 1121 // Relocation for a type-recording IC has the AST id added to it. This
1125 // member variable is a way to pass the information from the call site to 1122 // member variable is a way to pass the information from the call site to
1126 // the relocation info. 1123 // the relocation info.
1127 TypeFeedbackId recorded_ast_id_; 1124 TypeFeedbackId recorded_ast_id_;
1128 1125
1129 int32_t buffer_space() const { return reloc_info_writer.pos() - pc_; } 1126 int32_t buffer_space() const { return reloc_info_writer.pos() - pc_; }
1130 1127
1131 // Decode branch instruction at pos and return branch target pos. 1128 // Decode branch instruction at pos and return branch target pos.
1132 int target_at(int32_t pos, bool is_internal); 1129 int target_at(int32_t pos);
1133 1130
1134 // Patch branch instruction at pos to branch to given branch target pos. 1131 // Patch branch instruction at pos to branch to given branch target pos.
1135 void target_at_put(int32_t pos, int32_t target_pos, bool is_internal); 1132 void target_at_put(int32_t pos, int32_t target_pos);
1136 1133
1137 // Say if we need to relocate with this mode. 1134 // Say if we need to relocate with this mode.
1138 bool MustUseReg(RelocInfo::Mode rmode); 1135 bool MustUseReg(RelocInfo::Mode rmode);
1139 1136
1140 // Record reloc info for current pc_. 1137 // Record reloc info for current pc_.
1141 void RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data = 0); 1138 void RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data = 0);
1142 1139
1143 // Block the emission of the trampoline pool before pc_offset. 1140 // Block the emission of the trampoline pool before pc_offset.
1144 void BlockTrampolinePoolBefore(int pc_offset) { 1141 void BlockTrampolinePoolBefore(int pc_offset) {
1145 if (no_trampoline_pool_before_ < pc_offset) 1142 if (no_trampoline_pool_before_ < pc_offset)
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1294 1291
1295 void GenInstrJump(Opcode opcode, 1292 void GenInstrJump(Opcode opcode,
1296 uint32_t address); 1293 uint32_t address);
1297 1294
1298 // Helpers. 1295 // Helpers.
1299 void LoadRegPlusOffsetToAt(const MemOperand& src); 1296 void LoadRegPlusOffsetToAt(const MemOperand& src);
1300 1297
1301 // Labels. 1298 // Labels.
1302 void print(Label* L); 1299 void print(Label* L);
1303 void bind_to(Label* L, int pos); 1300 void bind_to(Label* L, int pos);
1304 void next(Label* L, bool is_internal); 1301 void next(Label* L);
1305 1302
1306 // One trampoline consists of: 1303 // One trampoline consists of:
1307 // - space for trampoline slots, 1304 // - space for trampoline slots,
1308 // - space for labels. 1305 // - space for labels.
1309 // 1306 //
1310 // Space for trampoline slots is equal to slot_count * 2 * kInstrSize. 1307 // Space for trampoline slots is equal to slot_count * 2 * kInstrSize.
1311 // Space for trampoline slots preceeds space for labels. Each label is of one 1308 // Space for trampoline slots preceeds space for labels. Each label is of one
1312 // instruction size, so total amount for labels is equal to 1309 // instruction size, so total amount for labels is equal to
1313 // label_count * kInstrSize. 1310 // label_count * kInstrSize.
1314 class Trampoline { 1311 class Trampoline {
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1359 // If trampoline is emitted, generated code is becoming large. As this is 1356 // If trampoline is emitted, generated code is becoming large. As this is
1360 // already a slow case which can possibly break our code generation for the 1357 // already a slow case which can possibly break our code generation for the
1361 // extreme case, we use this information to trigger different mode of 1358 // extreme case, we use this information to trigger different mode of
1362 // branch instruction generation, where we use jump instructions rather 1359 // branch instruction generation, where we use jump instructions rather
1363 // than regular branch instructions. 1360 // than regular branch instructions.
1364 bool trampoline_emitted_; 1361 bool trampoline_emitted_;
1365 static const int kTrampolineSlotsSize = 4 * kInstrSize; 1362 static const int kTrampolineSlotsSize = 4 * kInstrSize;
1366 static const int kMaxBranchOffset = (1 << (18 - 1)) - 1; 1363 static const int kMaxBranchOffset = (1 << (18 - 1)) - 1;
1367 static const int kInvalidSlotPos = -1; 1364 static const int kInvalidSlotPos = -1;
1368 1365
1369 // Internal reference positions, required for unbounded internal reference
1370 // labels.
1371 std::tr1::unordered_set<int> internal_reference_positions_;
1372
1373 Trampoline trampoline_; 1366 Trampoline trampoline_;
1374 bool internal_trampoline_exception_; 1367 bool internal_trampoline_exception_;
1375 1368
1376 friend class RegExpMacroAssemblerMIPS; 1369 friend class RegExpMacroAssemblerMIPS;
1377 friend class RelocInfo; 1370 friend class RelocInfo;
1378 friend class CodePatcher; 1371 friend class CodePatcher;
1379 friend class BlockTrampolinePoolScope; 1372 friend class BlockTrampolinePoolScope;
1380 1373
1381 PositionsRecorder positions_recorder_; 1374 PositionsRecorder positions_recorder_;
1382 friend class PositionsRecorder; 1375 friend class PositionsRecorder;
1383 friend class EnsureSpace; 1376 friend class EnsureSpace;
1384 }; 1377 };
1385 1378
1386 1379
1387 class EnsureSpace BASE_EMBEDDED { 1380 class EnsureSpace BASE_EMBEDDED {
1388 public: 1381 public:
1389 explicit EnsureSpace(Assembler* assembler) { 1382 explicit EnsureSpace(Assembler* assembler) {
1390 assembler->CheckBuffer(); 1383 assembler->CheckBuffer();
1391 } 1384 }
1392 }; 1385 };
1393 1386
1394 } } // namespace v8::internal 1387 } } // namespace v8::internal
1395 1388
1396 #endif // V8_ARM_ASSEMBLER_MIPS_H_ 1389 #endif // V8_ARM_ASSEMBLER_MIPS_H_
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