1 // Copyright 2013 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef V8_ARM64_ASSEMBLER_ARM64_INL_H_
6 #define V8_ARM64_ASSEMBLER_ARM64_INL_H_
8 #include "src/arm64/assembler-arm64.h"
9 #include "src/assembler.h"
10 #include "src/debug/debug.h"
17 bool CpuFeatures::SupportsCrankshaft() { return true; }
20 void RelocInfo::apply(intptr_t delta) {
21 // On arm64 only internal references need extra work.
22 DCHECK(RelocInfo::IsInternalReference(rmode_));
24 // Absolute code pointer inside code object moves with the code object.
25 intptr_t* p = reinterpret_cast<intptr_t*>(pc_);
26 *p += delta; // Relocate entry.
30 void RelocInfo::set_target_address(Address target,
31 WriteBarrierMode write_barrier_mode,
32 ICacheFlushMode icache_flush_mode) {
33 DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_));
34 Assembler::set_target_address_at(pc_, host_, target, icache_flush_mode);
35 if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL &&
36 IsCodeTarget(rmode_)) {
37 Object* target_code = Code::GetCodeFromTargetAddress(target);
38 host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
39 host(), this, HeapObject::cast(target_code));
44 inline unsigned CPURegister::code() const {
50 inline CPURegister::RegisterType CPURegister::type() const {
51 DCHECK(IsValidOrNone());
56 inline RegList CPURegister::Bit() const {
57 DCHECK(reg_code < (sizeof(RegList) * kBitsPerByte));
58 return IsValid() ? 1UL << reg_code : 0;
62 inline unsigned CPURegister::SizeInBits() const {
68 inline int CPURegister::SizeInBytes() const {
70 DCHECK(SizeInBits() % 8 == 0);
75 inline bool CPURegister::Is32Bits() const {
77 return reg_size == 32;
81 inline bool CPURegister::Is64Bits() const {
83 return reg_size == 64;
87 inline bool CPURegister::IsValid() const {
88 if (IsValidRegister() || IsValidFPRegister()) {
98 inline bool CPURegister::IsValidRegister() const {
99 return IsRegister() &&
100 ((reg_size == kWRegSizeInBits) || (reg_size == kXRegSizeInBits)) &&
101 ((reg_code < kNumberOfRegisters) || (reg_code == kSPRegInternalCode));
105 inline bool CPURegister::IsValidFPRegister() const {
106 return IsFPRegister() &&
107 ((reg_size == kSRegSizeInBits) || (reg_size == kDRegSizeInBits)) &&
108 (reg_code < kNumberOfFPRegisters);
112 inline bool CPURegister::IsNone() const {
113 // kNoRegister types should always have size 0 and code 0.
114 DCHECK((reg_type != kNoRegister) || (reg_code == 0));
115 DCHECK((reg_type != kNoRegister) || (reg_size == 0));
117 return reg_type == kNoRegister;
121 inline bool CPURegister::Is(const CPURegister& other) const {
122 DCHECK(IsValidOrNone() && other.IsValidOrNone());
123 return Aliases(other) && (reg_size == other.reg_size);
127 inline bool CPURegister::Aliases(const CPURegister& other) const {
128 DCHECK(IsValidOrNone() && other.IsValidOrNone());
129 return (reg_code == other.reg_code) && (reg_type == other.reg_type);
133 inline bool CPURegister::IsRegister() const {
134 return reg_type == kRegister;
138 inline bool CPURegister::IsFPRegister() const {
139 return reg_type == kFPRegister;
143 inline bool CPURegister::IsSameSizeAndType(const CPURegister& other) const {
144 return (reg_size == other.reg_size) && (reg_type == other.reg_type);
148 inline bool CPURegister::IsValidOrNone() const {
149 return IsValid() || IsNone();
153 inline bool CPURegister::IsZero() const {
155 return IsRegister() && (reg_code == kZeroRegCode);
159 inline bool CPURegister::IsSP() const {
161 return IsRegister() && (reg_code == kSPRegInternalCode);
165 inline void CPURegList::Combine(const CPURegList& other) {
167 DCHECK(other.type() == type_);
168 DCHECK(other.RegisterSizeInBits() == size_);
169 list_ |= other.list();
173 inline void CPURegList::Remove(const CPURegList& other) {
175 if (other.type() == type_) {
176 list_ &= ~other.list();
181 inline void CPURegList::Combine(const CPURegister& other) {
182 DCHECK(other.type() == type_);
183 DCHECK(other.SizeInBits() == size_);
184 Combine(other.code());
188 inline void CPURegList::Remove(const CPURegister& other1,
189 const CPURegister& other2,
190 const CPURegister& other3,
191 const CPURegister& other4) {
192 if (!other1.IsNone() && (other1.type() == type_)) Remove(other1.code());
193 if (!other2.IsNone() && (other2.type() == type_)) Remove(other2.code());
194 if (!other3.IsNone() && (other3.type() == type_)) Remove(other3.code());
195 if (!other4.IsNone() && (other4.type() == type_)) Remove(other4.code());
199 inline void CPURegList::Combine(int code) {
201 DCHECK(CPURegister::Create(code, size_, type_).IsValid());
202 list_ |= (1UL << code);
206 inline void CPURegList::Remove(int code) {
208 DCHECK(CPURegister::Create(code, size_, type_).IsValid());
209 list_ &= ~(1UL << code);
213 inline Register Register::XRegFromCode(unsigned code) {
214 if (code == kSPRegInternalCode) {
217 DCHECK(code < kNumberOfRegisters);
218 return Register::Create(code, kXRegSizeInBits);
223 inline Register Register::WRegFromCode(unsigned code) {
224 if (code == kSPRegInternalCode) {
227 DCHECK(code < kNumberOfRegisters);
228 return Register::Create(code, kWRegSizeInBits);
233 inline FPRegister FPRegister::SRegFromCode(unsigned code) {
234 DCHECK(code < kNumberOfFPRegisters);
235 return FPRegister::Create(code, kSRegSizeInBits);
239 inline FPRegister FPRegister::DRegFromCode(unsigned code) {
240 DCHECK(code < kNumberOfFPRegisters);
241 return FPRegister::Create(code, kDRegSizeInBits);
245 inline Register CPURegister::W() const {
246 DCHECK(IsValidRegister());
247 return Register::WRegFromCode(reg_code);
251 inline Register CPURegister::X() const {
252 DCHECK(IsValidRegister());
253 return Register::XRegFromCode(reg_code);
257 inline FPRegister CPURegister::S() const {
258 DCHECK(IsValidFPRegister());
259 return FPRegister::SRegFromCode(reg_code);
263 inline FPRegister CPURegister::D() const {
264 DCHECK(IsValidFPRegister());
265 return FPRegister::DRegFromCode(reg_code);
270 // Default initializer is for int types
272 struct ImmediateInitializer {
273 static const bool kIsIntType = true;
274 static inline RelocInfo::Mode rmode_for(T) {
275 return sizeof(T) == 8 ? RelocInfo::NONE64 : RelocInfo::NONE32;
277 static inline int64_t immediate_for(T t) {
278 STATIC_ASSERT(sizeof(T) <= 8);
285 struct ImmediateInitializer<Smi*> {
286 static const bool kIsIntType = false;
287 static inline RelocInfo::Mode rmode_for(Smi* t) {
288 return RelocInfo::NONE64;
290 static inline int64_t immediate_for(Smi* t) {;
291 return reinterpret_cast<int64_t>(t);
297 struct ImmediateInitializer<ExternalReference> {
298 static const bool kIsIntType = false;
299 static inline RelocInfo::Mode rmode_for(ExternalReference t) {
300 return RelocInfo::EXTERNAL_REFERENCE;
302 static inline int64_t immediate_for(ExternalReference t) {;
303 return reinterpret_cast<int64_t>(t.address());
309 Immediate::Immediate(Handle<T> value) {
310 InitializeHandle(value);
315 Immediate::Immediate(T t)
316 : value_(ImmediateInitializer<T>::immediate_for(t)),
317 rmode_(ImmediateInitializer<T>::rmode_for(t)) {}
321 Immediate::Immediate(T t, RelocInfo::Mode rmode)
322 : value_(ImmediateInitializer<T>::immediate_for(t)),
324 STATIC_ASSERT(ImmediateInitializer<T>::kIsIntType);
330 Operand::Operand(Handle<T> value) : immediate_(value), reg_(NoReg) {}
334 Operand::Operand(T t) : immediate_(t), reg_(NoReg) {}
338 Operand::Operand(T t, RelocInfo::Mode rmode)
339 : immediate_(t, rmode),
343 Operand::Operand(Register reg, Shift shift, unsigned shift_amount)
348 shift_amount_(shift_amount) {
349 DCHECK(reg.Is64Bits() || (shift_amount < kWRegSizeInBits));
350 DCHECK(reg.Is32Bits() || (shift_amount < kXRegSizeInBits));
355 Operand::Operand(Register reg, Extend extend, unsigned shift_amount)
360 shift_amount_(shift_amount) {
361 DCHECK(reg.IsValid());
362 DCHECK(shift_amount <= 4);
365 // Extend modes SXTX and UXTX require a 64-bit register.
366 DCHECK(reg.Is64Bits() || ((extend != SXTX) && (extend != UXTX)));
370 bool Operand::IsImmediate() const {
371 return reg_.Is(NoReg);
375 bool Operand::IsShiftedRegister() const {
376 return reg_.IsValid() && (shift_ != NO_SHIFT);
380 bool Operand::IsExtendedRegister() const {
381 return reg_.IsValid() && (extend_ != NO_EXTEND);
385 bool Operand::IsZero() const {
387 return ImmediateValue() == 0;
389 return reg().IsZero();
394 Operand Operand::ToExtendedRegister() const {
395 DCHECK(IsShiftedRegister());
396 DCHECK((shift_ == LSL) && (shift_amount_ <= 4));
397 return Operand(reg_, reg_.Is64Bits() ? UXTX : UXTW, shift_amount_);
401 Immediate Operand::immediate() const {
402 DCHECK(IsImmediate());
407 int64_t Operand::ImmediateValue() const {
408 DCHECK(IsImmediate());
409 return immediate_.value();
413 Register Operand::reg() const {
414 DCHECK(IsShiftedRegister() || IsExtendedRegister());
419 Shift Operand::shift() const {
420 DCHECK(IsShiftedRegister());
425 Extend Operand::extend() const {
426 DCHECK(IsExtendedRegister());
431 unsigned Operand::shift_amount() const {
432 DCHECK(IsShiftedRegister() || IsExtendedRegister());
433 return shift_amount_;
437 Operand Operand::UntagSmi(Register smi) {
438 STATIC_ASSERT(kXRegSizeInBits == static_cast<unsigned>(kSmiShift +
440 DCHECK(smi.Is64Bits());
441 return Operand(smi, ASR, kSmiShift);
445 Operand Operand::UntagSmiAndScale(Register smi, int scale) {
446 STATIC_ASSERT(kXRegSizeInBits == static_cast<unsigned>(kSmiShift +
448 DCHECK(smi.Is64Bits());
449 DCHECK((scale >= 0) && (scale <= (64 - kSmiValueSize)));
450 if (scale > kSmiShift) {
451 return Operand(smi, LSL, scale - kSmiShift);
452 } else if (scale < kSmiShift) {
453 return Operand(smi, ASR, kSmiShift - scale);
459 MemOperand::MemOperand()
460 : base_(NoReg), regoffset_(NoReg), offset_(0), addrmode_(Offset),
461 shift_(NO_SHIFT), extend_(NO_EXTEND), shift_amount_(0) {
465 MemOperand::MemOperand(Register base, int64_t offset, AddrMode addrmode)
466 : base_(base), regoffset_(NoReg), offset_(offset), addrmode_(addrmode),
467 shift_(NO_SHIFT), extend_(NO_EXTEND), shift_amount_(0) {
468 DCHECK(base.Is64Bits() && !base.IsZero());
472 MemOperand::MemOperand(Register base,
475 unsigned shift_amount)
476 : base_(base), regoffset_(regoffset), offset_(0), addrmode_(Offset),
477 shift_(NO_SHIFT), extend_(extend), shift_amount_(shift_amount) {
478 DCHECK(base.Is64Bits() && !base.IsZero());
479 DCHECK(!regoffset.IsSP());
480 DCHECK((extend == UXTW) || (extend == SXTW) || (extend == SXTX));
482 // SXTX extend mode requires a 64-bit offset register.
483 DCHECK(regoffset.Is64Bits() || (extend != SXTX));
487 MemOperand::MemOperand(Register base,
490 unsigned shift_amount)
491 : base_(base), regoffset_(regoffset), offset_(0), addrmode_(Offset),
492 shift_(shift), extend_(NO_EXTEND), shift_amount_(shift_amount) {
493 DCHECK(base.Is64Bits() && !base.IsZero());
494 DCHECK(regoffset.Is64Bits() && !regoffset.IsSP());
495 DCHECK(shift == LSL);
499 MemOperand::MemOperand(Register base, const Operand& offset, AddrMode addrmode)
500 : base_(base), addrmode_(addrmode) {
501 DCHECK(base.Is64Bits() && !base.IsZero());
503 if (offset.IsImmediate()) {
504 offset_ = offset.ImmediateValue();
507 } else if (offset.IsShiftedRegister()) {
508 DCHECK(addrmode == Offset);
510 regoffset_ = offset.reg();
511 shift_ = offset.shift();
512 shift_amount_ = offset.shift_amount();
517 // These assertions match those in the shifted-register constructor.
518 DCHECK(regoffset_.Is64Bits() && !regoffset_.IsSP());
519 DCHECK(shift_ == LSL);
521 DCHECK(offset.IsExtendedRegister());
522 DCHECK(addrmode == Offset);
524 regoffset_ = offset.reg();
525 extend_ = offset.extend();
526 shift_amount_ = offset.shift_amount();
531 // These assertions match those in the extended-register constructor.
532 DCHECK(!regoffset_.IsSP());
533 DCHECK((extend_ == UXTW) || (extend_ == SXTW) || (extend_ == SXTX));
534 DCHECK((regoffset_.Is64Bits() || (extend_ != SXTX)));
538 bool MemOperand::IsImmediateOffset() const {
539 return (addrmode_ == Offset) && regoffset_.Is(NoReg);
543 bool MemOperand::IsRegisterOffset() const {
544 return (addrmode_ == Offset) && !regoffset_.Is(NoReg);
548 bool MemOperand::IsPreIndex() const {
549 return addrmode_ == PreIndex;
553 bool MemOperand::IsPostIndex() const {
554 return addrmode_ == PostIndex;
557 Operand MemOperand::OffsetAsOperand() const {
558 if (IsImmediateOffset()) {
561 DCHECK(IsRegisterOffset());
562 if (extend() == NO_EXTEND) {
563 return Operand(regoffset(), shift(), shift_amount());
565 return Operand(regoffset(), extend(), shift_amount());
571 void Assembler::Unreachable() {
573 debug("UNREACHABLE", __LINE__, BREAK);
575 // Crash by branching to 0. lr now points near the fault.
581 Address Assembler::target_pointer_address_at(Address pc) {
582 Instruction* instr = reinterpret_cast<Instruction*>(pc);
583 DCHECK(instr->IsLdrLiteralX());
584 return reinterpret_cast<Address>(instr->ImmPCOffsetTarget());
588 // Read/Modify the code target address in the branch/call instruction at pc.
589 Address Assembler::target_address_at(Address pc, Address constant_pool) {
590 return Memory::Address_at(target_pointer_address_at(pc));
594 Address Assembler::target_address_at(Address pc, Code* code) {
595 Address constant_pool = code ? code->constant_pool() : NULL;
596 return target_address_at(pc, constant_pool);
600 Address Assembler::target_address_from_return_address(Address pc) {
601 // Returns the address of the call target from the return address that will
602 // be returned to after a call.
603 // Call sequence on ARM64 is:
604 // ldr ip0, #... @ load from literal pool
606 Address candidate = pc - 2 * kInstructionSize;
607 Instruction* instr = reinterpret_cast<Instruction*>(candidate);
609 DCHECK(instr->IsLdrLiteralX());
614 Address Assembler::return_address_from_call_start(Address pc) {
615 // The call, generated by MacroAssembler::Call, is one of two possible
618 // Without relocation:
619 // movz temp, #(target & 0x000000000000ffff)
620 // movk temp, #(target & 0x00000000ffff0000)
621 // movk temp, #(target & 0x0000ffff00000000)
628 // The return address is immediately after the blr instruction in both cases,
629 // so it can be found by adding the call size to the address at the start of
630 // the call sequence.
631 STATIC_ASSERT(Assembler::kCallSizeWithoutRelocation == 4 * kInstructionSize);
632 STATIC_ASSERT(Assembler::kCallSizeWithRelocation == 2 * kInstructionSize);
634 Instruction* instr = reinterpret_cast<Instruction*>(pc);
635 if (instr->IsMovz()) {
636 // Verify the instruction sequence.
637 DCHECK(instr->following(1)->IsMovk());
638 DCHECK(instr->following(2)->IsMovk());
639 DCHECK(instr->following(3)->IsBranchAndLinkToRegister());
640 return pc + Assembler::kCallSizeWithoutRelocation;
642 // Verify the instruction sequence.
643 DCHECK(instr->IsLdrLiteralX());
644 DCHECK(instr->following(1)->IsBranchAndLinkToRegister());
645 return pc + Assembler::kCallSizeWithRelocation;
650 void Assembler::deserialization_set_special_target_at(
651 Address constant_pool_entry, Code* code, Address target) {
652 Memory::Address_at(constant_pool_entry) = target;
656 void Assembler::deserialization_set_target_internal_reference_at(
657 Address pc, Address target, RelocInfo::Mode mode) {
658 Memory::Address_at(pc) = target;
662 void Assembler::set_target_address_at(Address pc, Address constant_pool,
664 ICacheFlushMode icache_flush_mode) {
665 Memory::Address_at(target_pointer_address_at(pc)) = target;
666 // Intuitively, we would think it is necessary to always flush the
667 // instruction cache after patching a target address in the code as follows:
668 // Assembler::FlushICacheWithoutIsolate(pc, sizeof(target));
669 // However, on ARM, an instruction is actually patched in the case of
670 // embedded constants of the form:
671 // ldr ip, [pc, #...]
672 // since the instruction accessing this address in the constant pool remains
673 // unchanged, a flush is not required.
677 void Assembler::set_target_address_at(Address pc,
680 ICacheFlushMode icache_flush_mode) {
681 Address constant_pool = code ? code->constant_pool() : NULL;
682 set_target_address_at(pc, constant_pool, target, icache_flush_mode);
686 int RelocInfo::target_address_size() {
691 Address RelocInfo::target_address() {
692 DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_));
693 return Assembler::target_address_at(pc_, host_);
697 Address RelocInfo::target_address_address() {
698 DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)
699 || rmode_ == EMBEDDED_OBJECT
700 || rmode_ == EXTERNAL_REFERENCE);
701 return Assembler::target_pointer_address_at(pc_);
705 Address RelocInfo::constant_pool_entry_address() {
706 DCHECK(IsInConstantPool());
707 return Assembler::target_pointer_address_at(pc_);
711 Object* RelocInfo::target_object() {
712 DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
713 return reinterpret_cast<Object*>(Assembler::target_address_at(pc_, host_));
717 Handle<Object> RelocInfo::target_object_handle(Assembler* origin) {
718 DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
719 return Handle<Object>(reinterpret_cast<Object**>(
720 Assembler::target_address_at(pc_, host_)));
724 void RelocInfo::set_target_object(Object* target,
725 WriteBarrierMode write_barrier_mode,
726 ICacheFlushMode icache_flush_mode) {
727 DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
728 Assembler::set_target_address_at(pc_, host_,
729 reinterpret_cast<Address>(target),
731 if (write_barrier_mode == UPDATE_WRITE_BARRIER &&
733 target->IsHeapObject()) {
734 host()->GetHeap()->incremental_marking()->RecordWrite(
735 host(), &Memory::Object_at(pc_), HeapObject::cast(target));
740 Address RelocInfo::target_external_reference() {
741 DCHECK(rmode_ == EXTERNAL_REFERENCE);
742 return Assembler::target_address_at(pc_, host_);
746 Address RelocInfo::target_internal_reference() {
747 DCHECK(rmode_ == INTERNAL_REFERENCE);
748 return Memory::Address_at(pc_);
752 Address RelocInfo::target_internal_reference_address() {
753 DCHECK(rmode_ == INTERNAL_REFERENCE);
754 return reinterpret_cast<Address>(pc_);
758 Address RelocInfo::target_runtime_entry(Assembler* origin) {
759 DCHECK(IsRuntimeEntry(rmode_));
760 return target_address();
764 void RelocInfo::set_target_runtime_entry(Address target,
765 WriteBarrierMode write_barrier_mode,
766 ICacheFlushMode icache_flush_mode) {
767 DCHECK(IsRuntimeEntry(rmode_));
768 if (target_address() != target) {
769 set_target_address(target, write_barrier_mode, icache_flush_mode);
774 Handle<Cell> RelocInfo::target_cell_handle() {
776 Cell *null_cell = NULL;
777 return Handle<Cell>(null_cell);
781 Cell* RelocInfo::target_cell() {
782 DCHECK(rmode_ == RelocInfo::CELL);
783 return Cell::FromValueAddress(Memory::Address_at(pc_));
787 void RelocInfo::set_target_cell(Cell* cell,
788 WriteBarrierMode write_barrier_mode,
789 ICacheFlushMode icache_flush_mode) {
794 static const int kNoCodeAgeSequenceLength = 5 * kInstructionSize;
795 static const int kCodeAgeStubEntryOffset = 3 * kInstructionSize;
798 Handle<Object> RelocInfo::code_age_stub_handle(Assembler* origin) {
799 UNREACHABLE(); // This should never be reached on ARM64.
800 return Handle<Object>();
804 Code* RelocInfo::code_age_stub() {
805 DCHECK(rmode_ == RelocInfo::CODE_AGE_SEQUENCE);
806 // Read the stub entry point from the code age sequence.
807 Address stub_entry_address = pc_ + kCodeAgeStubEntryOffset;
808 return Code::GetCodeFromTargetAddress(Memory::Address_at(stub_entry_address));
812 void RelocInfo::set_code_age_stub(Code* stub,
813 ICacheFlushMode icache_flush_mode) {
814 DCHECK(rmode_ == RelocInfo::CODE_AGE_SEQUENCE);
815 DCHECK(!Code::IsYoungSequence(stub->GetIsolate(), pc_));
816 // Overwrite the stub entry point in the code age sequence. This is loaded as
817 // a literal so there is no need to call FlushICache here.
818 Address stub_entry_address = pc_ + kCodeAgeStubEntryOffset;
819 Memory::Address_at(stub_entry_address) = stub->instruction_start();
823 Address RelocInfo::debug_call_address() {
824 DCHECK(IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence());
825 // For the above sequences the Relocinfo points to the load literal loading
827 STATIC_ASSERT(Assembler::kPatchDebugBreakSlotAddressOffset == 0);
828 return Assembler::target_address_at(pc_, host_);
832 void RelocInfo::set_debug_call_address(Address target) {
833 DCHECK(IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence());
834 STATIC_ASSERT(Assembler::kPatchDebugBreakSlotAddressOffset == 0);
835 Assembler::set_target_address_at(pc_, host_, target);
836 if (host() != NULL) {
837 Object* target_code = Code::GetCodeFromTargetAddress(target);
838 host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
839 host(), this, HeapObject::cast(target_code));
844 void RelocInfo::WipeOut() {
845 DCHECK(IsEmbeddedObject(rmode_) || IsCodeTarget(rmode_) ||
846 IsRuntimeEntry(rmode_) || IsExternalReference(rmode_) ||
847 IsInternalReference(rmode_));
848 if (IsInternalReference(rmode_)) {
849 Memory::Address_at(pc_) = NULL;
851 Assembler::set_target_address_at(pc_, host_, NULL);
856 bool RelocInfo::IsPatchedReturnSequence() {
857 // The sequence must be:
858 // ldr ip0, [pc, #offset]
860 // See arm64/debug-arm64.cc DebugCodegen::PatchDebugBreakSlot
861 Instruction* i1 = reinterpret_cast<Instruction*>(pc_);
862 Instruction* i2 = i1->following();
863 return i1->IsLdrLiteralX() && (i1->Rt() == kIp0Code) &&
864 i2->IsBranchAndLinkToRegister() && (i2->Rn() == kIp0Code);
868 bool RelocInfo::IsPatchedDebugBreakSlotSequence() {
869 Instruction* current_instr = reinterpret_cast<Instruction*>(pc_);
870 return !current_instr->IsNop(Assembler::DEBUG_BREAK_NOP);
874 void RelocInfo::Visit(Isolate* isolate, ObjectVisitor* visitor) {
875 RelocInfo::Mode mode = rmode();
876 if (mode == RelocInfo::EMBEDDED_OBJECT) {
877 visitor->VisitEmbeddedPointer(this);
878 } else if (RelocInfo::IsCodeTarget(mode)) {
879 visitor->VisitCodeTarget(this);
880 } else if (mode == RelocInfo::CELL) {
881 visitor->VisitCell(this);
882 } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
883 visitor->VisitExternalReference(this);
884 } else if (mode == RelocInfo::INTERNAL_REFERENCE) {
885 visitor->VisitInternalReference(this);
886 } else if (RelocInfo::IsDebugBreakSlot(mode) &&
887 IsPatchedDebugBreakSlotSequence()) {
888 visitor->VisitDebugTarget(this);
889 } else if (RelocInfo::IsRuntimeEntry(mode)) {
890 visitor->VisitRuntimeEntry(this);
895 template<typename StaticVisitor>
896 void RelocInfo::Visit(Heap* heap) {
897 RelocInfo::Mode mode = rmode();
898 if (mode == RelocInfo::EMBEDDED_OBJECT) {
899 StaticVisitor::VisitEmbeddedPointer(heap, this);
900 } else if (RelocInfo::IsCodeTarget(mode)) {
901 StaticVisitor::VisitCodeTarget(heap, this);
902 } else if (mode == RelocInfo::CELL) {
903 StaticVisitor::VisitCell(heap, this);
904 } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
905 StaticVisitor::VisitExternalReference(this);
906 } else if (mode == RelocInfo::INTERNAL_REFERENCE) {
907 StaticVisitor::VisitInternalReference(this);
908 } else if (RelocInfo::IsDebugBreakSlot(mode) &&
909 IsPatchedDebugBreakSlotSequence()) {
910 StaticVisitor::VisitDebugTarget(heap, this);
911 } else if (RelocInfo::IsRuntimeEntry(mode)) {
912 StaticVisitor::VisitRuntimeEntry(this);
917 LoadStoreOp Assembler::LoadOpFor(const CPURegister& rt) {
918 DCHECK(rt.IsValid());
919 if (rt.IsRegister()) {
920 return rt.Is64Bits() ? LDR_x : LDR_w;
922 DCHECK(rt.IsFPRegister());
923 return rt.Is64Bits() ? LDR_d : LDR_s;
928 LoadStorePairOp Assembler::LoadPairOpFor(const CPURegister& rt,
929 const CPURegister& rt2) {
930 DCHECK(AreSameSizeAndType(rt, rt2));
932 if (rt.IsRegister()) {
933 return rt.Is64Bits() ? LDP_x : LDP_w;
935 DCHECK(rt.IsFPRegister());
936 return rt.Is64Bits() ? LDP_d : LDP_s;
941 LoadStoreOp Assembler::StoreOpFor(const CPURegister& rt) {
942 DCHECK(rt.IsValid());
943 if (rt.IsRegister()) {
944 return rt.Is64Bits() ? STR_x : STR_w;
946 DCHECK(rt.IsFPRegister());
947 return rt.Is64Bits() ? STR_d : STR_s;
952 LoadStorePairOp Assembler::StorePairOpFor(const CPURegister& rt,
953 const CPURegister& rt2) {
954 DCHECK(AreSameSizeAndType(rt, rt2));
956 if (rt.IsRegister()) {
957 return rt.Is64Bits() ? STP_x : STP_w;
959 DCHECK(rt.IsFPRegister());
960 return rt.Is64Bits() ? STP_d : STP_s;
965 LoadLiteralOp Assembler::LoadLiteralOpFor(const CPURegister& rt) {
966 if (rt.IsRegister()) {
967 return rt.Is64Bits() ? LDR_x_lit : LDR_w_lit;
969 DCHECK(rt.IsFPRegister());
970 return rt.Is64Bits() ? LDR_d_lit : LDR_s_lit;
975 int Assembler::LinkAndGetInstructionOffsetTo(Label* label) {
976 DCHECK(kStartOfLabelLinkChain == 0);
977 int offset = LinkAndGetByteOffsetTo(label);
978 DCHECK(IsAligned(offset, kInstructionSize));
979 return offset >> kInstructionSizeLog2;
983 Instr Assembler::Flags(FlagsUpdate S) {
985 return 1 << FlagsUpdate_offset;
986 } else if (S == LeaveFlags) {
987 return 0 << FlagsUpdate_offset;
994 Instr Assembler::Cond(Condition cond) {
995 return cond << Condition_offset;
999 Instr Assembler::ImmPCRelAddress(int imm21) {
1000 CHECK(is_int21(imm21));
1001 Instr imm = static_cast<Instr>(truncate_to_int21(imm21));
1002 Instr immhi = (imm >> ImmPCRelLo_width) << ImmPCRelHi_offset;
1003 Instr immlo = imm << ImmPCRelLo_offset;
1004 return (immhi & ImmPCRelHi_mask) | (immlo & ImmPCRelLo_mask);
1008 Instr Assembler::ImmUncondBranch(int imm26) {
1009 CHECK(is_int26(imm26));
1010 return truncate_to_int26(imm26) << ImmUncondBranch_offset;
1014 Instr Assembler::ImmCondBranch(int imm19) {
1015 CHECK(is_int19(imm19));
1016 return truncate_to_int19(imm19) << ImmCondBranch_offset;
1020 Instr Assembler::ImmCmpBranch(int imm19) {
1021 CHECK(is_int19(imm19));
1022 return truncate_to_int19(imm19) << ImmCmpBranch_offset;
1026 Instr Assembler::ImmTestBranch(int imm14) {
1027 CHECK(is_int14(imm14));
1028 return truncate_to_int14(imm14) << ImmTestBranch_offset;
1032 Instr Assembler::ImmTestBranchBit(unsigned bit_pos) {
1033 DCHECK(is_uint6(bit_pos));
1034 // Subtract five from the shift offset, as we need bit 5 from bit_pos.
1035 unsigned b5 = bit_pos << (ImmTestBranchBit5_offset - 5);
1036 unsigned b40 = bit_pos << ImmTestBranchBit40_offset;
1037 b5 &= ImmTestBranchBit5_mask;
1038 b40 &= ImmTestBranchBit40_mask;
1043 Instr Assembler::SF(Register rd) {
1044 return rd.Is64Bits() ? SixtyFourBits : ThirtyTwoBits;
1048 Instr Assembler::ImmAddSub(int imm) {
1049 DCHECK(IsImmAddSub(imm));
1050 if (is_uint12(imm)) { // No shift required.
1051 imm <<= ImmAddSub_offset;
1053 imm = ((imm >> 12) << ImmAddSub_offset) | (1 << ShiftAddSub_offset);
1059 Instr Assembler::ImmS(unsigned imms, unsigned reg_size) {
1060 DCHECK(((reg_size == kXRegSizeInBits) && is_uint6(imms)) ||
1061 ((reg_size == kWRegSizeInBits) && is_uint5(imms)));
1063 return imms << ImmS_offset;
1067 Instr Assembler::ImmR(unsigned immr, unsigned reg_size) {
1068 DCHECK(((reg_size == kXRegSizeInBits) && is_uint6(immr)) ||
1069 ((reg_size == kWRegSizeInBits) && is_uint5(immr)));
1071 DCHECK(is_uint6(immr));
1072 return immr << ImmR_offset;
1076 Instr Assembler::ImmSetBits(unsigned imms, unsigned reg_size) {
1077 DCHECK((reg_size == kWRegSizeInBits) || (reg_size == kXRegSizeInBits));
1078 DCHECK(is_uint6(imms));
1079 DCHECK((reg_size == kXRegSizeInBits) || is_uint6(imms + 3));
1081 return imms << ImmSetBits_offset;
1085 Instr Assembler::ImmRotate(unsigned immr, unsigned reg_size) {
1086 DCHECK((reg_size == kWRegSizeInBits) || (reg_size == kXRegSizeInBits));
1087 DCHECK(((reg_size == kXRegSizeInBits) && is_uint6(immr)) ||
1088 ((reg_size == kWRegSizeInBits) && is_uint5(immr)));
1090 return immr << ImmRotate_offset;
1094 Instr Assembler::ImmLLiteral(int imm19) {
1095 CHECK(is_int19(imm19));
1096 return truncate_to_int19(imm19) << ImmLLiteral_offset;
1100 Instr Assembler::BitN(unsigned bitn, unsigned reg_size) {
1101 DCHECK((reg_size == kWRegSizeInBits) || (reg_size == kXRegSizeInBits));
1102 DCHECK((reg_size == kXRegSizeInBits) || (bitn == 0));
1104 return bitn << BitN_offset;
1108 Instr Assembler::ShiftDP(Shift shift) {
1109 DCHECK(shift == LSL || shift == LSR || shift == ASR || shift == ROR);
1110 return shift << ShiftDP_offset;
1114 Instr Assembler::ImmDPShift(unsigned amount) {
1115 DCHECK(is_uint6(amount));
1116 return amount << ImmDPShift_offset;
1120 Instr Assembler::ExtendMode(Extend extend) {
1121 return extend << ExtendMode_offset;
1125 Instr Assembler::ImmExtendShift(unsigned left_shift) {
1126 DCHECK(left_shift <= 4);
1127 return left_shift << ImmExtendShift_offset;
1131 Instr Assembler::ImmCondCmp(unsigned imm) {
1132 DCHECK(is_uint5(imm));
1133 return imm << ImmCondCmp_offset;
1137 Instr Assembler::Nzcv(StatusFlags nzcv) {
1138 return ((nzcv >> Flags_offset) & 0xf) << Nzcv_offset;
1142 Instr Assembler::ImmLSUnsigned(int imm12) {
1143 DCHECK(is_uint12(imm12));
1144 return imm12 << ImmLSUnsigned_offset;
1148 Instr Assembler::ImmLS(int imm9) {
1149 DCHECK(is_int9(imm9));
1150 return truncate_to_int9(imm9) << ImmLS_offset;
1154 Instr Assembler::ImmLSPair(int imm7, LSDataSize size) {
1155 DCHECK(((imm7 >> size) << size) == imm7);
1156 int scaled_imm7 = imm7 >> size;
1157 DCHECK(is_int7(scaled_imm7));
1158 return truncate_to_int7(scaled_imm7) << ImmLSPair_offset;
1162 Instr Assembler::ImmShiftLS(unsigned shift_amount) {
1163 DCHECK(is_uint1(shift_amount));
1164 return shift_amount << ImmShiftLS_offset;
1168 Instr Assembler::ImmException(int imm16) {
1169 DCHECK(is_uint16(imm16));
1170 return imm16 << ImmException_offset;
1174 Instr Assembler::ImmSystemRegister(int imm15) {
1175 DCHECK(is_uint15(imm15));
1176 return imm15 << ImmSystemRegister_offset;
1180 Instr Assembler::ImmHint(int imm7) {
1181 DCHECK(is_uint7(imm7));
1182 return imm7 << ImmHint_offset;
1186 Instr Assembler::ImmBarrierDomain(int imm2) {
1187 DCHECK(is_uint2(imm2));
1188 return imm2 << ImmBarrierDomain_offset;
1192 Instr Assembler::ImmBarrierType(int imm2) {
1193 DCHECK(is_uint2(imm2));
1194 return imm2 << ImmBarrierType_offset;
1198 LSDataSize Assembler::CalcLSDataSize(LoadStoreOp op) {
1199 DCHECK((SizeLS_offset + SizeLS_width) == (kInstructionSize * 8));
1200 return static_cast<LSDataSize>(op >> SizeLS_offset);
1204 Instr Assembler::ImmMoveWide(int imm) {
1205 DCHECK(is_uint16(imm));
1206 return imm << ImmMoveWide_offset;
1210 Instr Assembler::ShiftMoveWide(int shift) {
1211 DCHECK(is_uint2(shift));
1212 return shift << ShiftMoveWide_offset;
1216 Instr Assembler::FPType(FPRegister fd) {
1217 return fd.Is64Bits() ? FP64 : FP32;
1221 Instr Assembler::FPScale(unsigned scale) {
1222 DCHECK(is_uint6(scale));
1223 return scale << FPScale_offset;
1227 const Register& Assembler::AppropriateZeroRegFor(const CPURegister& reg) const {
1228 return reg.Is64Bits() ? xzr : wzr;
1232 inline void Assembler::CheckBufferSpace() {
1233 DCHECK(pc_ < (buffer_ + buffer_size_));
1234 if (buffer_space() < kGap) {
1240 inline void Assembler::CheckBuffer() {
1242 if (pc_offset() >= next_veneer_pool_check_) {
1243 CheckVeneerPool(false, true);
1245 if (pc_offset() >= next_constant_pool_check_) {
1246 CheckConstPool(false, true);
1251 TypeFeedbackId Assembler::RecordedAstId() {
1252 DCHECK(!recorded_ast_id_.IsNone());
1253 return recorded_ast_id_;
1257 void Assembler::ClearRecordedAstId() {
1258 recorded_ast_id_ = TypeFeedbackId::None();
1262 } // namespace internal
1265 #endif // V8_ARM64_ASSEMBLER_ARM64_INL_H_