src/v8/src/mips/assembler-mips-inl.h - cobalt - Git at Google


 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
 // - Redistribution in binary form must reproduce the above copyright
 // notice, this list of conditions and the following disclaimer in the
 // documentation and/or other materials provided with the distribution.
 //
 // - Neither the name of Sun Microsystems or the names of contributors may
 // be used to endorse or promote products derived from this software without
 // specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 // IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 // THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 // The original source code covered by the above license above has been
 // modified significantly by Google Inc.
 // Copyright 2012 the V8 project authors. All rights reserved.


 #ifndef V8_MIPS_ASSEMBLER_MIPS_INL_H_
 #define V8_MIPS_ASSEMBLER_MIPS_INL_H_

 #include "src/mips/assembler-mips.h"

 #include "src/assembler.h"
 #include "src/debug/debug.h"
 #include "src/objects-inl.h"

 namespace v8 {
 namespace internal {


 bool CpuFeatures::SupportsCrankshaft() { return IsSupported(FPU); }

 bool CpuFeatures::SupportsWasmSimd128() { return IsSupported(MIPS_SIMD); }

 // -----------------------------------------------------------------------------
 // Operand and MemOperand.

 bool Operand::is_reg() const {
   return rm_.is_valid();
 }

 int32_t Operand::immediate() const {
   DCHECK(!is_reg());
   DCHECK(!IsHeapObjectRequest());
   return value_.immediate;
 }

 // -----------------------------------------------------------------------------
 // RelocInfo.

 void RelocInfo::apply(intptr_t delta) {
   if (IsInternalReference(rmode_) || IsInternalReferenceEncoded(rmode_)) {
     // Absolute code pointer inside code object moves with the code object.
     byte* p = reinterpret_cast<byte*>(pc_);
     Assembler::RelocateInternalReference(rmode_, p, delta);
   }
 }


 Address RelocInfo::target_address() {
   DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_) || IsWasmCall(rmode_));
   return Assembler::target_address_at(pc_, constant_pool_);
 }

 Address RelocInfo::target_address_address() {
   DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_) || IsWasmCall(rmode_) ||
          rmode_ == EMBEDDED_OBJECT || rmode_ == EXTERNAL_REFERENCE);
   // Read the address of the word containing the target_address in an
   // instruction stream.
   // The only architecture-independent user of this function is the serializer.
   // The serializer uses it to find out how many raw bytes of instruction to
   // output before the next target.
   // For an instruction like LUI/ORI where the target bits are mixed into the
   // instruction bits, the size of the target will be zero, indicating that the
   // serializer should not step forward in memory after a target is resolved
   // and written. In this case the target_address_address function should
   // return the end of the instructions to be patched, allowing the
   // deserializer to deserialize the instructions as raw bytes and put them in
   // place, ready to be patched with the target. After jump optimization,
   // that is the address of the instruction that follows J/JAL/JR/JALR
   // instruction.
   if (IsMipsArchVariant(kMips32r6)) {
     // On R6 we don't move to the end of the instructions to be patched, but one
     // instruction before, because if these instructions are at the end of the
     // code object it can cause errors in the deserializer.
     return reinterpret_cast<Address>(
         pc_ +
         (Assembler::kInstructionsFor32BitConstant - 1) * Assembler::kInstrSize);
   } else {
     return reinterpret_cast<Address>(
         pc_ + Assembler::kInstructionsFor32BitConstant * Assembler::kInstrSize);
   }
 }


 Address RelocInfo::constant_pool_entry_address() {
   UNREACHABLE();
 }


 int RelocInfo::target_address_size() {
   return Assembler::kSpecialTargetSize;
 }

 Address Assembler::target_address_from_return_address(Address pc) {
   return pc - kCallTargetAddressOffset;
 }

 void Assembler::deserialization_set_special_target_at(
     Isolate* isolate, Address instruction_payload, Code* code, Address target) {
   if (IsMipsArchVariant(kMips32r6)) {
     // On R6 the address location is shifted by one instruction
     set_target_address_at(
         isolate,
         instruction_payload - (kInstructionsFor32BitConstant - 1) * kInstrSize,
         code ? code->constant_pool() : nullptr, target);
   } else {
     set_target_address_at(
         isolate,
         instruction_payload - kInstructionsFor32BitConstant * kInstrSize,
         code ? code->constant_pool() : nullptr, target);
   }
 }

 void Assembler::set_target_internal_reference_encoded_at(Address pc,
                                                          Address target) {
   Instr instr1 = Assembler::instr_at(pc + 0 * Assembler::kInstrSize);
   Instr instr2 = Assembler::instr_at(pc + 1 * Assembler::kInstrSize);
   DCHECK(Assembler::IsLui(instr1));
   DCHECK(Assembler::IsOri(instr2) || Assembler::IsJicOrJialc(instr2));
   instr1 &= ~kImm16Mask;
   instr2 &= ~kImm16Mask;
   int32_t imm = reinterpret_cast<int32_t>(target);
   DCHECK_EQ(imm & 3, 0);
   if (Assembler::IsJicOrJialc(instr2)) {
     // Encoded internal references are lui/jic load of 32-bit absolute address.
     uint32_t lui_offset_u, jic_offset_u;
     Assembler::UnpackTargetAddressUnsigned(imm, lui_offset_u, jic_offset_u);

     Assembler::instr_at_put(pc + 0 * Assembler::kInstrSize,
                             instr1 | lui_offset_u);
     Assembler::instr_at_put(pc + 1 * Assembler::kInstrSize,
                             instr2 | jic_offset_u);
   } else {
     // Encoded internal references are lui/ori load of 32-bit absolute address.
     Assembler::instr_at_put(pc + 0 * Assembler::kInstrSize,
                             instr1 | ((imm >> kLuiShift) & kImm16Mask));
     Assembler::instr_at_put(pc + 1 * Assembler::kInstrSize,
                             instr2 | (imm & kImm16Mask));
   }

   // Currently used only by deserializer, and all code will be flushed
   // after complete deserialization, no need to flush on each reference.
 }


 void Assembler::deserialization_set_target_internal_reference_at(
     Isolate* isolate, Address pc, Address target, RelocInfo::Mode mode) {
   if (mode == RelocInfo::INTERNAL_REFERENCE_ENCODED) {
     DCHECK(IsLui(instr_at(pc)));
     set_target_internal_reference_encoded_at(pc, target);
   } else {
     DCHECK(mode == RelocInfo::INTERNAL_REFERENCE);
     Memory::Address_at(pc) = target;
   }
 }

 HeapObject* RelocInfo::target_object() {
   DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
   return HeapObject::cast(reinterpret_cast<Object*>(
       Assembler::target_address_at(pc_, constant_pool_)));
 }

 Handle<HeapObject> RelocInfo::target_object_handle(Assembler* origin) {
   DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
   return Handle<HeapObject>(reinterpret_cast<HeapObject**>(
       Assembler::target_address_at(pc_, constant_pool_)));
 }

 void RelocInfo::set_target_object(HeapObject* target,
                                   WriteBarrierMode write_barrier_mode,
                                   ICacheFlushMode icache_flush_mode) {
   DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
   Assembler::set_target_address_at(target->GetIsolate(), pc_, constant_pool_,
                                    reinterpret_cast<Address>(target),
                                    icache_flush_mode);
   if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != nullptr) {
     host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
         host(), this, HeapObject::cast(target));
     host()->GetHeap()->RecordWriteIntoCode(host(), this, target);
   }
 }


 Address RelocInfo::target_external_reference() {
   DCHECK(rmode_ == EXTERNAL_REFERENCE);
   return Assembler::target_address_at(pc_, constant_pool_);
 }


 Address RelocInfo::target_internal_reference() {
   if (rmode_ == INTERNAL_REFERENCE) {
     return Memory::Address_at(pc_);
   } else {
     // Encoded internal references are lui/ori or lui/jic load of 32-bit
     // absolute address.
     DCHECK(rmode_ == INTERNAL_REFERENCE_ENCODED);
     Instr instr1 = Assembler::instr_at(pc_ + 0 * Assembler::kInstrSize);
     Instr instr2 = Assembler::instr_at(pc_ + 1 * Assembler::kInstrSize);
     DCHECK(Assembler::IsLui(instr1));
     DCHECK(Assembler::IsOri(instr2) || Assembler::IsJicOrJialc(instr2));
     if (Assembler::IsJicOrJialc(instr2)) {
       return reinterpret_cast<Address>(
           Assembler::CreateTargetAddress(instr1, instr2));
     }
     int32_t imm = (instr1 & static_cast<int32_t>(kImm16Mask)) << kLuiShift;
     imm |= (instr2 & static_cast<int32_t>(kImm16Mask));
     return reinterpret_cast<Address>(imm);
   }
 }


 Address RelocInfo::target_internal_reference_address() {
   DCHECK(rmode_ == INTERNAL_REFERENCE || rmode_ == INTERNAL_REFERENCE_ENCODED);
   return reinterpret_cast<Address>(pc_);
 }


 Address RelocInfo::target_runtime_entry(Assembler* origin) {
   DCHECK(IsRuntimeEntry(rmode_));
   return target_address();
 }

 void RelocInfo::set_target_runtime_entry(Isolate* isolate, Address target,
                                          WriteBarrierMode write_barrier_mode,
                                          ICacheFlushMode icache_flush_mode) {
   DCHECK(IsRuntimeEntry(rmode_));
   if (target_address() != target)
     set_target_address(isolate, target, write_barrier_mode, icache_flush_mode);
 }

 void RelocInfo::WipeOut(Isolate* isolate) {
   DCHECK(IsEmbeddedObject(rmode_) || IsCodeTarget(rmode_) ||
          IsRuntimeEntry(rmode_) || IsExternalReference(rmode_) ||
          IsInternalReference(rmode_) || IsInternalReferenceEncoded(rmode_));
   if (IsInternalReference(rmode_)) {
     Memory::Address_at(pc_) = nullptr;
   } else if (IsInternalReferenceEncoded(rmode_)) {
     Assembler::set_target_internal_reference_encoded_at(pc_, nullptr);
   } else {
     Assembler::set_target_address_at(isolate, pc_, constant_pool_, nullptr);
   }
 }

 template <typename ObjectVisitor>
 void RelocInfo::Visit(Isolate* isolate, ObjectVisitor* visitor) {
   RelocInfo::Mode mode = rmode();
   if (mode == RelocInfo::EMBEDDED_OBJECT) {
     visitor->VisitEmbeddedPointer(host(), this);
   } else if (RelocInfo::IsCodeTarget(mode)) {
     visitor->VisitCodeTarget(host(), this);
   } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
     visitor->VisitExternalReference(host(), this);
   } else if (mode == RelocInfo::INTERNAL_REFERENCE ||
              mode == RelocInfo::INTERNAL_REFERENCE_ENCODED) {
     visitor->VisitInternalReference(host(), this);
   } else if (RelocInfo::IsRuntimeEntry(mode)) {
     visitor->VisitRuntimeEntry(host(), this);
   }
 }

 // -----------------------------------------------------------------------------
 // Assembler.


 void Assembler::CheckBuffer() {
   if (buffer_space() <= kGap) {
     GrowBuffer();
   }
 }


 void Assembler::CheckTrampolinePoolQuick(int extra_instructions) {
   if (pc_offset() >= next_buffer_check_ - extra_instructions * kInstrSize) {
     CheckTrampolinePool();
   }
 }


 void Assembler::CheckForEmitInForbiddenSlot() {
   if (!is_buffer_growth_blocked()) {
     CheckBuffer();
   }
   if (IsPrevInstrCompactBranch()) {
     // Nop instruction to precede a CTI in forbidden slot:
     Instr nop = SPECIAL | SLL;
     *reinterpret_cast<Instr*>(pc_) = nop;
     pc_ += kInstrSize;

     ClearCompactBranchState();
   }
 }


 void Assembler::EmitHelper(Instr x, CompactBranchType is_compact_branch) {
   if (IsPrevInstrCompactBranch()) {
     if (Instruction::IsForbiddenAfterBranchInstr(x)) {
       // Nop instruction to precede a CTI in forbidden slot:
       Instr nop = SPECIAL | SLL;
       *reinterpret_cast<Instr*>(pc_) = nop;
       pc_ += kInstrSize;
     }
     ClearCompactBranchState();
   }
   *reinterpret_cast<Instr*>(pc_) = x;
   pc_ += kInstrSize;
   if (is_compact_branch == CompactBranchType::COMPACT_BRANCH) {
     EmittedCompactBranchInstruction();
   }
   CheckTrampolinePoolQuick();
 }

 template <>
 inline void Assembler::EmitHelper(uint8_t x);

 template <typename T>
 void Assembler::EmitHelper(T x) {
   *reinterpret_cast<T*>(pc_) = x;
   pc_ += sizeof(x);
   CheckTrampolinePoolQuick();
 }

 template <>
 void Assembler::EmitHelper(uint8_t x) {
   *reinterpret_cast<uint8_t*>(pc_) = x;
   pc_ += sizeof(x);
   if (reinterpret_cast<intptr_t>(pc_) % kInstrSize == 0) {
     CheckTrampolinePoolQuick();
   }
 }

 void Assembler::emit(Instr x, CompactBranchType is_compact_branch) {
   if (!is_buffer_growth_blocked()) {
     CheckBuffer();
   }
   EmitHelper(x, is_compact_branch);
 }

 EnsureSpace::EnsureSpace(Assembler* assembler) { assembler->CheckBuffer(); }

 }  // namespace internal
 }  // namespace v8

 #endif  // V8_MIPS_ASSEMBLER_MIPS_INL_H_

	// Copyright (c) 1994-2006 Sun Microsystems Inc.
	// All Rights Reserved.
	//
	// Redistribution and use in source and binary forms, with or without
	// modification, are permitted provided that the following conditions are
	// met:
	//
	// - Redistributions of source code must retain the above copyright notice,
	// this list of conditions and the following disclaimer.
	//
	// - Redistribution in binary form must reproduce the above copyright
	// notice, this list of conditions and the following disclaimer in the
	// documentation and/or other materials provided with the distribution.
	//
	// - Neither the name of Sun Microsystems or the names of contributors may
	// be used to endorse or promote products derived from this software without
	// specific prior written permission.
	//
	// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
	// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
	// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
	// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
	// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
	// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	// The original source code covered by the above license above has been
	// modified significantly by Google Inc.
	// Copyright 2012 the V8 project authors. All rights reserved.


	#ifndef V8_MIPS_ASSEMBLER_MIPS_INL_H_
	#define V8_MIPS_ASSEMBLER_MIPS_INL_H_

	#include "src/mips/assembler-mips.h"

	#include "src/assembler.h"
	#include "src/debug/debug.h"
	#include "src/objects-inl.h"

	namespace v8 {
	namespace internal {


	bool CpuFeatures::SupportsCrankshaft() { return IsSupported(FPU); }

	bool CpuFeatures::SupportsWasmSimd128() { return IsSupported(MIPS_SIMD); }

	// -----------------------------------------------------------------------------
	// Operand and MemOperand.

	bool Operand::is_reg() const {
	return rm_.is_valid();
	}

	int32_t Operand::immediate() const {
	DCHECK(!is_reg());
	DCHECK(!IsHeapObjectRequest());
	return value_.immediate;
	}

	// -----------------------------------------------------------------------------
	// RelocInfo.

	void RelocInfo::apply(intptr_t delta) {
	if (IsInternalReference(rmode_) \|\| IsInternalReferenceEncoded(rmode_)) {
	// Absolute code pointer inside code object moves with the code object.
	byte* p = reinterpret_cast<byte*>(pc_);
	Assembler::RelocateInternalReference(rmode_, p, delta);
	}
	}


	Address RelocInfo::target_address() {
	DCHECK(IsCodeTarget(rmode_) \|\| IsRuntimeEntry(rmode_) \|\| IsWasmCall(rmode_));
	return Assembler::target_address_at(pc_, constant_pool_);
	}

	Address RelocInfo::target_address_address() {
	DCHECK(IsCodeTarget(rmode_) \|\| IsRuntimeEntry(rmode_) \|\| IsWasmCall(rmode_) \|\|
	rmode_ == EMBEDDED_OBJECT \|\| rmode_ == EXTERNAL_REFERENCE);
	// Read the address of the word containing the target_address in an
	// instruction stream.
	// The only architecture-independent user of this function is the serializer.
	// The serializer uses it to find out how many raw bytes of instruction to
	// output before the next target.
	// For an instruction like LUI/ORI where the target bits are mixed into the
	// instruction bits, the size of the target will be zero, indicating that the
	// serializer should not step forward in memory after a target is resolved
	// and written. In this case the target_address_address function should
	// return the end of the instructions to be patched, allowing the
	// deserializer to deserialize the instructions as raw bytes and put them in
	// place, ready to be patched with the target. After jump optimization,
	// that is the address of the instruction that follows J/JAL/JR/JALR
	// instruction.
	if (IsMipsArchVariant(kMips32r6)) {
	// On R6 we don't move to the end of the instructions to be patched, but one
	// instruction before, because if these instructions are at the end of the
	// code object it can cause errors in the deserializer.
	return reinterpret_cast<Address>(
	pc_ +
	(Assembler::kInstructionsFor32BitConstant - 1) * Assembler::kInstrSize);
	} else {
	return reinterpret_cast<Address>(
	pc_ + Assembler::kInstructionsFor32BitConstant * Assembler::kInstrSize);
	}
	}


	Address RelocInfo::constant_pool_entry_address() {
	UNREACHABLE();
	}


	int RelocInfo::target_address_size() {
	return Assembler::kSpecialTargetSize;
	}

	Address Assembler::target_address_from_return_address(Address pc) {
	return pc - kCallTargetAddressOffset;
	}

	void Assembler::deserialization_set_special_target_at(
	Isolate* isolate, Address instruction_payload, Code* code, Address target) {
	if (IsMipsArchVariant(kMips32r6)) {
	// On R6 the address location is shifted by one instruction
	set_target_address_at(
	isolate,
	instruction_payload - (kInstructionsFor32BitConstant - 1) * kInstrSize,
	code ? code->constant_pool() : nullptr, target);
	} else {
	set_target_address_at(
	isolate,
	instruction_payload - kInstructionsFor32BitConstant * kInstrSize,
	code ? code->constant_pool() : nullptr, target);
	}
	}

	void Assembler::set_target_internal_reference_encoded_at(Address pc,
	Address target) {
	Instr instr1 = Assembler::instr_at(pc + 0 * Assembler::kInstrSize);
	Instr instr2 = Assembler::instr_at(pc + 1 * Assembler::kInstrSize);
	DCHECK(Assembler::IsLui(instr1));
	DCHECK(Assembler::IsOri(instr2) \|\| Assembler::IsJicOrJialc(instr2));
	instr1 &= ~kImm16Mask;
	instr2 &= ~kImm16Mask;
	int32_t imm = reinterpret_cast<int32_t>(target);
	DCHECK_EQ(imm & 3, 0);
	if (Assembler::IsJicOrJialc(instr2)) {
	// Encoded internal references are lui/jic load of 32-bit absolute address.
	uint32_t lui_offset_u, jic_offset_u;
	Assembler::UnpackTargetAddressUnsigned(imm, lui_offset_u, jic_offset_u);

	Assembler::instr_at_put(pc + 0 * Assembler::kInstrSize,
	instr1 \| lui_offset_u);
	Assembler::instr_at_put(pc + 1 * Assembler::kInstrSize,
	instr2 \| jic_offset_u);
	} else {
	// Encoded internal references are lui/ori load of 32-bit absolute address.
	Assembler::instr_at_put(pc + 0 * Assembler::kInstrSize,
	instr1 \| ((imm >> kLuiShift) & kImm16Mask));
	Assembler::instr_at_put(pc + 1 * Assembler::kInstrSize,
	instr2 \| (imm & kImm16Mask));
	}

	// Currently used only by deserializer, and all code will be flushed
	// after complete deserialization, no need to flush on each reference.
	}


	void Assembler::deserialization_set_target_internal_reference_at(
	Isolate* isolate, Address pc, Address target, RelocInfo::Mode mode) {
	if (mode == RelocInfo::INTERNAL_REFERENCE_ENCODED) {
	DCHECK(IsLui(instr_at(pc)));
	set_target_internal_reference_encoded_at(pc, target);
	} else {
	DCHECK(mode == RelocInfo::INTERNAL_REFERENCE);
	Memory::Address_at(pc) = target;
	}
	}

	HeapObject* RelocInfo::target_object() {
	DCHECK(IsCodeTarget(rmode_) \|\| rmode_ == EMBEDDED_OBJECT);
	return HeapObject::cast(reinterpret_cast<Object*>(
	Assembler::target_address_at(pc_, constant_pool_)));
	}

	Handle<HeapObject> RelocInfo::target_object_handle(Assembler* origin) {
	DCHECK(IsCodeTarget(rmode_) \|\| rmode_ == EMBEDDED_OBJECT);
	return Handle<HeapObject>(reinterpret_cast<HeapObject**>(
	Assembler::target_address_at(pc_, constant_pool_)));
	}

	void RelocInfo::set_target_object(HeapObject* target,
	WriteBarrierMode write_barrier_mode,
	ICacheFlushMode icache_flush_mode) {
	DCHECK(IsCodeTarget(rmode_) \|\| rmode_ == EMBEDDED_OBJECT);
	Assembler::set_target_address_at(target->GetIsolate(), pc_, constant_pool_,
	reinterpret_cast<Address>(target),
	icache_flush_mode);
	if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != nullptr) {
	host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
	host(), this, HeapObject::cast(target));
	host()->GetHeap()->RecordWriteIntoCode(host(), this, target);
	}
	}


	Address RelocInfo::target_external_reference() {
	DCHECK(rmode_ == EXTERNAL_REFERENCE);
	return Assembler::target_address_at(pc_, constant_pool_);
	}


	Address RelocInfo::target_internal_reference() {
	if (rmode_ == INTERNAL_REFERENCE) {
	return Memory::Address_at(pc_);
	} else {
	// Encoded internal references are lui/ori or lui/jic load of 32-bit
	// absolute address.
	DCHECK(rmode_ == INTERNAL_REFERENCE_ENCODED);
	Instr instr1 = Assembler::instr_at(pc_ + 0 * Assembler::kInstrSize);
	Instr instr2 = Assembler::instr_at(pc_ + 1 * Assembler::kInstrSize);
	DCHECK(Assembler::IsLui(instr1));
	DCHECK(Assembler::IsOri(instr2) \|\| Assembler::IsJicOrJialc(instr2));
	if (Assembler::IsJicOrJialc(instr2)) {
	return reinterpret_cast<Address>(
	Assembler::CreateTargetAddress(instr1, instr2));
	}
	int32_t imm = (instr1 & static_cast<int32_t>(kImm16Mask)) << kLuiShift;
	imm \|= (instr2 & static_cast<int32_t>(kImm16Mask));
	return reinterpret_cast<Address>(imm);
	}
	}


	Address RelocInfo::target_internal_reference_address() {
	DCHECK(rmode_ == INTERNAL_REFERENCE \|\| rmode_ == INTERNAL_REFERENCE_ENCODED);
	return reinterpret_cast<Address>(pc_);
	}


	Address RelocInfo::target_runtime_entry(Assembler* origin) {
	DCHECK(IsRuntimeEntry(rmode_));
	return target_address();
	}

	void RelocInfo::set_target_runtime_entry(Isolate* isolate, Address target,
	WriteBarrierMode write_barrier_mode,
	ICacheFlushMode icache_flush_mode) {
	DCHECK(IsRuntimeEntry(rmode_));
	if (target_address() != target)
	set_target_address(isolate, target, write_barrier_mode, icache_flush_mode);
	}

	void RelocInfo::WipeOut(Isolate* isolate) {
	DCHECK(IsEmbeddedObject(rmode_) \|\| IsCodeTarget(rmode_) \|\|
	IsRuntimeEntry(rmode_) \|\| IsExternalReference(rmode_) \|\|
	IsInternalReference(rmode_) \|\| IsInternalReferenceEncoded(rmode_));
	if (IsInternalReference(rmode_)) {
	Memory::Address_at(pc_) = nullptr;
	} else if (IsInternalReferenceEncoded(rmode_)) {
	Assembler::set_target_internal_reference_encoded_at(pc_, nullptr);
	} else {
	Assembler::set_target_address_at(isolate, pc_, constant_pool_, nullptr);
	}
	}

	template <typename ObjectVisitor>
	void RelocInfo::Visit(Isolate* isolate, ObjectVisitor* visitor) {
	RelocInfo::Mode mode = rmode();
	if (mode == RelocInfo::EMBEDDED_OBJECT) {
	visitor->VisitEmbeddedPointer(host(), this);
	} else if (RelocInfo::IsCodeTarget(mode)) {
	visitor->VisitCodeTarget(host(), this);
	} else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
	visitor->VisitExternalReference(host(), this);
	} else if (mode == RelocInfo::INTERNAL_REFERENCE \|\|
	mode == RelocInfo::INTERNAL_REFERENCE_ENCODED) {
	visitor->VisitInternalReference(host(), this);
	} else if (RelocInfo::IsRuntimeEntry(mode)) {
	visitor->VisitRuntimeEntry(host(), this);
	}
	}

	// -----------------------------------------------------------------------------
	// Assembler.


	void Assembler::CheckBuffer() {
	if (buffer_space() <= kGap) {
	GrowBuffer();
	}
	}


	void Assembler::CheckTrampolinePoolQuick(int extra_instructions) {
	if (pc_offset() >= next_buffer_check_ - extra_instructions * kInstrSize) {
	CheckTrampolinePool();
	}
	}


	void Assembler::CheckForEmitInForbiddenSlot() {
	if (!is_buffer_growth_blocked()) {
	CheckBuffer();
	}
	if (IsPrevInstrCompactBranch()) {
	// Nop instruction to precede a CTI in forbidden slot:
	Instr nop = SPECIAL \| SLL;
	reinterpret_cast<Instr>(pc_) = nop;
	pc_ += kInstrSize;

	ClearCompactBranchState();
	}
	}


	void Assembler::EmitHelper(Instr x, CompactBranchType is_compact_branch) {
	if (IsPrevInstrCompactBranch()) {
	if (Instruction::IsForbiddenAfterBranchInstr(x)) {
	// Nop instruction to precede a CTI in forbidden slot:
	Instr nop = SPECIAL \| SLL;
	reinterpret_cast<Instr>(pc_) = nop;
	pc_ += kInstrSize;
	}
	ClearCompactBranchState();
	}
	reinterpret_cast<Instr>(pc_) = x;
	pc_ += kInstrSize;
	if (is_compact_branch == CompactBranchType::COMPACT_BRANCH) {
	EmittedCompactBranchInstruction();
	}
	CheckTrampolinePoolQuick();
	}

	template <>
	inline void Assembler::EmitHelper(uint8_t x);

	template <typename T>
	void Assembler::EmitHelper(T x) {
	reinterpret_cast<T>(pc_) = x;
	pc_ += sizeof(x);
	CheckTrampolinePoolQuick();
	}

	template <>
	void Assembler::EmitHelper(uint8_t x) {
	reinterpret_cast<uint8_t>(pc_) = x;
	pc_ += sizeof(x);
	if (reinterpret_cast<intptr_t>(pc_) % kInstrSize == 0) {
	CheckTrampolinePoolQuick();
	}
	}

	void Assembler::emit(Instr x, CompactBranchType is_compact_branch) {
	if (!is_buffer_growth_blocked()) {
	CheckBuffer();
	}
	EmitHelper(x, is_compact_branch);
	}

	EnsureSpace::EnsureSpace(Assembler* assembler) { assembler->CheckBuffer(); }

	} // namespace internal
	} // namespace v8

	#endif // V8_MIPS_ASSEMBLER_MIPS_INL_H_