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

Issue 1593713002: MIPS: Refine 'r6 compact branch optimization.' (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Add DCHECKs, rebased. Created 4 years, 11 months ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 5
6 // Declares a Simulator for MIPS instructions if we are not generating a native 6 // Declares a Simulator for MIPS instructions if we are not generating a native
7 // MIPS binary. This Simulator allows us to run and debug MIPS code generation 7 // MIPS binary. This Simulator allows us to run and debug MIPS code generation
8 // on regular desktop machines. 8 // on regular desktop machines.
9 // V8 calls into generated code by "calling" the CALL_GENERATED_CODE macro, 9 // V8 calls into generated code by "calling" the CALL_GENERATED_CODE macro,
10 // which will start execution in the Simulator or forwards to the real entry 10 // which will start execution in the Simulator or forwards to the real entry
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352 } 352 }
353 353
354 void DecodeTypeImmediate(Instruction* instr); 354 void DecodeTypeImmediate(Instruction* instr);
355 void DecodeTypeJump(Instruction* instr); 355 void DecodeTypeJump(Instruction* instr);
356 356
357 // Used for breakpoints and traps. 357 // Used for breakpoints and traps.
358 void SoftwareInterrupt(Instruction* instr); 358 void SoftwareInterrupt(Instruction* instr);
359 359
360 // Compact branch guard. 360 // Compact branch guard.
361 void CheckForbiddenSlot(int32_t current_pc) { 361 void CheckForbiddenSlot(int32_t current_pc) {
362 Instruction* instr_aftter_compact_branch = 362 Instruction* instr_after_compact_branch =
363 reinterpret_cast<Instruction*>(current_pc + Instruction::kInstrSize); 363 reinterpret_cast<Instruction*>(current_pc + Instruction::kInstrSize);
364 if (instr_aftter_compact_branch->IsForbiddenInBranchDelay()) { 364 if (instr_after_compact_branch->IsForbiddenAfterBranch()) {
365 V8_Fatal(__FILE__, __LINE__, 365 V8_Fatal(__FILE__, __LINE__,
366 "Error: Unexpected instruction 0x%08x immediately after a " 366 "Error: Unexpected instruction 0x%08x immediately after a "
367 "compact branch instruction.", 367 "compact branch instruction.",
368 *reinterpret_cast<uint32_t*>(instr_aftter_compact_branch)); 368 *reinterpret_cast<uint32_t*>(instr_after_compact_branch));
369 } 369 }
370 } 370 }
371 371
372 // Stop helper functions. 372 // Stop helper functions.
373 bool IsWatchpoint(uint32_t code); 373 bool IsWatchpoint(uint32_t code);
374 void PrintWatchpoint(uint32_t code); 374 void PrintWatchpoint(uint32_t code);
375 void HandleStop(uint32_t code, Instruction* instr); 375 void HandleStop(uint32_t code, Instruction* instr);
376 bool IsStopInstruction(Instruction* instr); 376 bool IsStopInstruction(Instruction* instr);
377 bool IsEnabledStop(uint32_t code); 377 bool IsEnabledStop(uint32_t code);
378 void EnableStop(uint32_t code); 378 void EnableStop(uint32_t code);
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505 static inline void UnregisterCTryCatch(Isolate* isolate) { 505 static inline void UnregisterCTryCatch(Isolate* isolate) {
506 Simulator::current(isolate)->PopAddress(); 506 Simulator::current(isolate)->PopAddress();
507 } 507 }
508 }; 508 };
509 509
510 } // namespace internal 510 } // namespace internal
511 } // namespace v8 511 } // namespace v8
512 512
513 #endif // !defined(USE_SIMULATOR) 513 #endif // !defined(USE_SIMULATOR)
514 #endif // V8_MIPS_SIMULATOR_MIPS_H_ 514 #endif // V8_MIPS_SIMULATOR_MIPS_H_
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