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

Issue 922043005: 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
41 #include "src/assembler.h" 43 #include "src/assembler.h"
42 #include "src/mips/constants-mips.h" 44 #include "src/mips/constants-mips.h"
43 #include "src/serialize.h" 45 #include "src/serialize.h"
44 46
45 namespace v8 { 47 namespace v8 {
46 namespace internal { 48 namespace internal {
47 49
48 // CPU Registers. 50 // CPU Registers.
49 // 51 //
50 // 1) We would prefer to use an enum, but enum values are assignment- 52 // 1) We would prefer to use an enum, but enum values are assignment-
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1014 1016
1015 // Record a comment relocation entry that can be used by a disassembler. 1017 // Record a comment relocation entry that can be used by a disassembler.
1016 // Use --code-comments to enable. 1018 // Use --code-comments to enable.
1017 void RecordComment(const char* msg); 1019 void RecordComment(const char* msg);
1018 1020
1019 // Record a deoptimization reason that can be used by a log or cpu profiler. 1021 // Record a deoptimization reason that can be used by a log or cpu profiler.
1020 // Use --trace-deopt to enable. 1022 // Use --trace-deopt to enable.
1021 void RecordDeoptReason(const int reason, const int raw_position); 1023 void RecordDeoptReason(const int reason, const int raw_position);
1022 1024
1023 1025
1024 static int RelocateInternalReference(byte* pc, intptr_t pc_delta); 1026 static int RelocateInternalReference(RelocInfo::Mode rmode, byte* pc,
1027 intptr_t pc_delta);
1025 1028
1026 // Writes a single byte or word of data in the code stream. Used for 1029 // Writes a single byte or word of data in the code stream. Used for
1027 // inline tables, e.g., jump-tables. 1030 // inline tables, e.g., jump-tables.
1028 void db(uint8_t data); 1031 void db(uint8_t data);
1029 void dd(uint32_t data); 1032 void dd(uint32_t data);
1030 void dd(Label* label); 1033 void dd(Label* label);
1031 1034
1032 // Emits the address of the code stub's first instruction. 1035 // Emits the address of the code stub's first instruction.
1033 void emit_code_stub_address(Code* stub); 1036 void emit_code_stub_address(Code* stub);
1034 1037
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1119 1122
1120 protected: 1123 protected:
1121 // Relocation for a type-recording IC has the AST id added to it. This 1124 // Relocation for a type-recording IC has the AST id added to it. This
1122 // member variable is a way to pass the information from the call site to 1125 // member variable is a way to pass the information from the call site to
1123 // the relocation info. 1126 // the relocation info.
1124 TypeFeedbackId recorded_ast_id_; 1127 TypeFeedbackId recorded_ast_id_;
1125 1128
1126 int32_t buffer_space() const { return reloc_info_writer.pos() - pc_; } 1129 int32_t buffer_space() const { return reloc_info_writer.pos() - pc_; }
1127 1130
1128 // Decode branch instruction at pos and return branch target pos. 1131 // Decode branch instruction at pos and return branch target pos.
1129 int target_at(int32_t pos); 1132 int target_at(int32_t pos, bool is_internal);
1130 1133
1131 // Patch branch instruction at pos to branch to given branch target pos. 1134 // Patch branch instruction at pos to branch to given branch target pos.
1132 void target_at_put(int32_t pos, int32_t target_pos); 1135 void target_at_put(int32_t pos, int32_t target_pos, bool is_internal);
1133 1136
1134 // Say if we need to relocate with this mode. 1137 // Say if we need to relocate with this mode.
1135 bool MustUseReg(RelocInfo::Mode rmode); 1138 bool MustUseReg(RelocInfo::Mode rmode);
1136 1139
1137 // Record reloc info for current pc_. 1140 // Record reloc info for current pc_.
1138 void RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data = 0); 1141 void RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data = 0);
1139 1142
1140 // Block the emission of the trampoline pool before pc_offset. 1143 // Block the emission of the trampoline pool before pc_offset.
1141 void BlockTrampolinePoolBefore(int pc_offset) { 1144 void BlockTrampolinePoolBefore(int pc_offset) {
1142 if (no_trampoline_pool_before_ < pc_offset) 1145 if (no_trampoline_pool_before_ < pc_offset)
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1291 1294
1292 void GenInstrJump(Opcode opcode, 1295 void GenInstrJump(Opcode opcode,
1293 uint32_t address); 1296 uint32_t address);
1294 1297
1295 // Helpers. 1298 // Helpers.
1296 void LoadRegPlusOffsetToAt(const MemOperand& src); 1299 void LoadRegPlusOffsetToAt(const MemOperand& src);
1297 1300
1298 // Labels. 1301 // Labels.
1299 void print(Label* L); 1302 void print(Label* L);
1300 void bind_to(Label* L, int pos); 1303 void bind_to(Label* L, int pos);
1301 void next(Label* L); 1304 void next(Label* L, bool is_internal);
1302 1305
1303 // One trampoline consists of: 1306 // One trampoline consists of:
1304 // - space for trampoline slots, 1307 // - space for trampoline slots,
1305 // - space for labels. 1308 // - space for labels.
1306 // 1309 //
1307 // Space for trampoline slots is equal to slot_count * 2 * kInstrSize. 1310 // Space for trampoline slots is equal to slot_count * 2 * kInstrSize.
1308 // Space for trampoline slots preceeds space for labels. Each label is of one 1311 // Space for trampoline slots preceeds space for labels. Each label is of one
1309 // instruction size, so total amount for labels is equal to 1312 // instruction size, so total amount for labels is equal to
1310 // label_count * kInstrSize. 1313 // label_count * kInstrSize.
1311 class Trampoline { 1314 class Trampoline {
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1356 // If trampoline is emitted, generated code is becoming large. As this is 1359 // If trampoline is emitted, generated code is becoming large. As this is
1357 // already a slow case which can possibly break our code generation for the 1360 // already a slow case which can possibly break our code generation for the
1358 // extreme case, we use this information to trigger different mode of 1361 // extreme case, we use this information to trigger different mode of
1359 // branch instruction generation, where we use jump instructions rather 1362 // branch instruction generation, where we use jump instructions rather
1360 // than regular branch instructions. 1363 // than regular branch instructions.
1361 bool trampoline_emitted_; 1364 bool trampoline_emitted_;
1362 static const int kTrampolineSlotsSize = 4 * kInstrSize; 1365 static const int kTrampolineSlotsSize = 4 * kInstrSize;
1363 static const int kMaxBranchOffset = (1 << (18 - 1)) - 1; 1366 static const int kMaxBranchOffset = (1 << (18 - 1)) - 1;
1364 static const int kInvalidSlotPos = -1; 1367 static const int kInvalidSlotPos = -1;
1365 1368
1369 // Internal reference positions, required for unbounded internal reference
1370 // labels.
1371 std::tr1::unordered_set<int> internal_reference_positions_;
1372
1366 Trampoline trampoline_; 1373 Trampoline trampoline_;
1367 bool internal_trampoline_exception_; 1374 bool internal_trampoline_exception_;
1368 1375
1369 friend class RegExpMacroAssemblerMIPS; 1376 friend class RegExpMacroAssemblerMIPS;
1370 friend class RelocInfo; 1377 friend class RelocInfo;
1371 friend class CodePatcher; 1378 friend class CodePatcher;
1372 friend class BlockTrampolinePoolScope; 1379 friend class BlockTrampolinePoolScope;
1373 1380
1374 PositionsRecorder positions_recorder_; 1381 PositionsRecorder positions_recorder_;
1375 friend class PositionsRecorder; 1382 friend class PositionsRecorder;
1376 friend class EnsureSpace; 1383 friend class EnsureSpace;
1377 }; 1384 };
1378 1385
1379 1386
1380 class EnsureSpace BASE_EMBEDDED { 1387 class EnsureSpace BASE_EMBEDDED {
1381 public: 1388 public:
1382 explicit EnsureSpace(Assembler* assembler) { 1389 explicit EnsureSpace(Assembler* assembler) {
1383 assembler->CheckBuffer(); 1390 assembler->CheckBuffer();
1384 } 1391 }
1385 }; 1392 };
1386 1393
1387 } } // namespace v8::internal 1394 } } // namespace v8::internal
1388 1395
1389 #endif // V8_ARM_ASSEMBLER_MIPS_H_ 1396 #endif // V8_ARM_ASSEMBLER_MIPS_H_
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