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Unified Diff: src/x64/lithium-codegen-x64.cc

Issue 1405363003: Move Hydrogen and Lithium to src/crankshaft/ (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: rebased Created 5 years, 2 months ago
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Index: src/x64/lithium-codegen-x64.cc
diff --git a/src/x64/lithium-codegen-x64.cc b/src/x64/lithium-codegen-x64.cc
deleted file mode 100644
index 993c17461d67dbdaa1b17fb1f8d1a662e3816234..0000000000000000000000000000000000000000
--- a/src/x64/lithium-codegen-x64.cc
+++ /dev/null
@@ -1,5912 +0,0 @@
-// Copyright 2013 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#if V8_TARGET_ARCH_X64
-
-#include "src/base/bits.h"
-#include "src/code-factory.h"
-#include "src/code-stubs.h"
-#include "src/hydrogen-osr.h"
-#include "src/ic/ic.h"
-#include "src/ic/stub-cache.h"
-#include "src/profiler/cpu-profiler.h"
-#include "src/x64/lithium-codegen-x64.h"
-
-namespace v8 {
-namespace internal {
-
-
-// When invoking builtins, we need to record the safepoint in the middle of
-// the invoke instruction sequence generated by the macro assembler.
-class SafepointGenerator final : public CallWrapper {
- public:
- SafepointGenerator(LCodeGen* codegen,
- LPointerMap* pointers,
- Safepoint::DeoptMode mode)
- : codegen_(codegen),
- pointers_(pointers),
- deopt_mode_(mode) { }
- virtual ~SafepointGenerator() {}
-
- void BeforeCall(int call_size) const override {}
-
- void AfterCall() const override {
- codegen_->RecordSafepoint(pointers_, deopt_mode_);
- }
-
- private:
- LCodeGen* codegen_;
- LPointerMap* pointers_;
- Safepoint::DeoptMode deopt_mode_;
-};
-
-
-#define __ masm()->
-
-bool LCodeGen::GenerateCode() {
- LPhase phase("Z_Code generation", chunk());
- DCHECK(is_unused());
- status_ = GENERATING;
-
- // Open a frame scope to indicate that there is a frame on the stack. The
- // MANUAL indicates that the scope shouldn't actually generate code to set up
- // the frame (that is done in GeneratePrologue).
- FrameScope frame_scope(masm_, StackFrame::MANUAL);
-
- return GeneratePrologue() &&
- GenerateBody() &&
- GenerateDeferredCode() &&
- GenerateJumpTable() &&
- GenerateSafepointTable();
-}
-
-
-void LCodeGen::FinishCode(Handle<Code> code) {
- DCHECK(is_done());
- code->set_stack_slots(GetStackSlotCount());
- code->set_safepoint_table_offset(safepoints_.GetCodeOffset());
- PopulateDeoptimizationData(code);
-}
-
-
-#ifdef _MSC_VER
-void LCodeGen::MakeSureStackPagesMapped(int offset) {
- const int kPageSize = 4 * KB;
- for (offset -= kPageSize; offset > 0; offset -= kPageSize) {
- __ movp(Operand(rsp, offset), rax);
- }
-}
-#endif
-
-
-void LCodeGen::SaveCallerDoubles() {
- DCHECK(info()->saves_caller_doubles());
- DCHECK(NeedsEagerFrame());
- Comment(";;; Save clobbered callee double registers");
- int count = 0;
- BitVector* doubles = chunk()->allocated_double_registers();
- BitVector::Iterator save_iterator(doubles);
- while (!save_iterator.Done()) {
- __ Movsd(MemOperand(rsp, count * kDoubleSize),
- XMMRegister::from_code(save_iterator.Current()));
- save_iterator.Advance();
- count++;
- }
-}
-
-
-void LCodeGen::RestoreCallerDoubles() {
- DCHECK(info()->saves_caller_doubles());
- DCHECK(NeedsEagerFrame());
- Comment(";;; Restore clobbered callee double registers");
- BitVector* doubles = chunk()->allocated_double_registers();
- BitVector::Iterator save_iterator(doubles);
- int count = 0;
- while (!save_iterator.Done()) {
- __ Movsd(XMMRegister::from_code(save_iterator.Current()),
- MemOperand(rsp, count * kDoubleSize));
- save_iterator.Advance();
- count++;
- }
-}
-
-
-bool LCodeGen::GeneratePrologue() {
- DCHECK(is_generating());
-
- if (info()->IsOptimizing()) {
- ProfileEntryHookStub::MaybeCallEntryHook(masm_);
-
-#ifdef DEBUG
- if (strlen(FLAG_stop_at) > 0 &&
- info_->literal()->name()->IsUtf8EqualTo(CStrVector(FLAG_stop_at))) {
- __ int3();
- }
-#endif
-
- // Sloppy mode functions need to replace the receiver with the global proxy
- // when called as functions (without an explicit receiver object).
- if (info()->MustReplaceUndefinedReceiverWithGlobalProxy()) {
- Label ok;
- StackArgumentsAccessor args(rsp, scope()->num_parameters());
- __ movp(rcx, args.GetReceiverOperand());
-
- __ CompareRoot(rcx, Heap::kUndefinedValueRootIndex);
- __ j(not_equal, &ok, Label::kNear);
-
- __ movp(rcx, GlobalObjectOperand());
- __ movp(rcx, FieldOperand(rcx, GlobalObject::kGlobalProxyOffset));
-
- __ movp(args.GetReceiverOperand(), rcx);
-
- __ bind(&ok);
- }
- }
-
- info()->set_prologue_offset(masm_->pc_offset());
- if (NeedsEagerFrame()) {
- DCHECK(!frame_is_built_);
- frame_is_built_ = true;
- if (info()->IsStub()) {
- __ StubPrologue();
- } else {
- __ Prologue(info()->IsCodePreAgingActive());
- }
- }
-
- // Reserve space for the stack slots needed by the code.
- int slots = GetStackSlotCount();
- if (slots > 0) {
- if (FLAG_debug_code) {
- __ subp(rsp, Immediate(slots * kPointerSize));
-#ifdef _MSC_VER
- MakeSureStackPagesMapped(slots * kPointerSize);
-#endif
- __ Push(rax);
- __ Set(rax, slots);
- __ Set(kScratchRegister, kSlotsZapValue);
- Label loop;
- __ bind(&loop);
- __ movp(MemOperand(rsp, rax, times_pointer_size, 0),
- kScratchRegister);
- __ decl(rax);
- __ j(not_zero, &loop);
- __ Pop(rax);
- } else {
- __ subp(rsp, Immediate(slots * kPointerSize));
-#ifdef _MSC_VER
- MakeSureStackPagesMapped(slots * kPointerSize);
-#endif
- }
-
- if (info()->saves_caller_doubles()) {
- SaveCallerDoubles();
- }
- }
- return !is_aborted();
-}
-
-
-void LCodeGen::DoPrologue(LPrologue* instr) {
- Comment(";;; Prologue begin");
-
- // Possibly allocate a local context.
- if (info_->num_heap_slots() > 0) {
- Comment(";;; Allocate local context");
- bool need_write_barrier = true;
- // Argument to NewContext is the function, which is still in rdi.
- int slots = info_->num_heap_slots() - Context::MIN_CONTEXT_SLOTS;
- Safepoint::DeoptMode deopt_mode = Safepoint::kNoLazyDeopt;
- if (info()->scope()->is_script_scope()) {
- __ Push(rdi);
- __ Push(info()->scope()->GetScopeInfo(info()->isolate()));
- __ CallRuntime(Runtime::kNewScriptContext, 2);
- deopt_mode = Safepoint::kLazyDeopt;
- } else if (slots <= FastNewContextStub::kMaximumSlots) {
- FastNewContextStub stub(isolate(), slots);
- __ CallStub(&stub);
- // Result of FastNewContextStub is always in new space.
- need_write_barrier = false;
- } else {
- __ Push(rdi);
- __ CallRuntime(Runtime::kNewFunctionContext, 1);
- }
- RecordSafepoint(deopt_mode);
-
- // Context is returned in rax. It replaces the context passed to us.
- // It's saved in the stack and kept live in rsi.
- __ movp(rsi, rax);
- __ movp(Operand(rbp, StandardFrameConstants::kContextOffset), rax);
-
- // Copy any necessary parameters into the context.
- int num_parameters = scope()->num_parameters();
- int first_parameter = scope()->has_this_declaration() ? -1 : 0;
- for (int i = first_parameter; i < num_parameters; i++) {
- Variable* var = (i == -1) ? scope()->receiver() : scope()->parameter(i);
- if (var->IsContextSlot()) {
- int parameter_offset = StandardFrameConstants::kCallerSPOffset +
- (num_parameters - 1 - i) * kPointerSize;
- // Load parameter from stack.
- __ movp(rax, Operand(rbp, parameter_offset));
- // Store it in the context.
- int context_offset = Context::SlotOffset(var->index());
- __ movp(Operand(rsi, context_offset), rax);
- // Update the write barrier. This clobbers rax and rbx.
- if (need_write_barrier) {
- __ RecordWriteContextSlot(rsi, context_offset, rax, rbx, kSaveFPRegs);
- } else if (FLAG_debug_code) {
- Label done;
- __ JumpIfInNewSpace(rsi, rax, &done, Label::kNear);
- __ Abort(kExpectedNewSpaceObject);
- __ bind(&done);
- }
- }
- }
- Comment(";;; End allocate local context");
- }
-
- Comment(";;; Prologue end");
-}
-
-
-void LCodeGen::GenerateOsrPrologue() {
- // Generate the OSR entry prologue at the first unknown OSR value, or if there
- // are none, at the OSR entrypoint instruction.
- if (osr_pc_offset_ >= 0) return;
-
- osr_pc_offset_ = masm()->pc_offset();
-
- // Adjust the frame size, subsuming the unoptimized frame into the
- // optimized frame.
- int slots = GetStackSlotCount() - graph()->osr()->UnoptimizedFrameSlots();
- DCHECK(slots >= 0);
- __ subp(rsp, Immediate(slots * kPointerSize));
-}
-
-
-void LCodeGen::GenerateBodyInstructionPre(LInstruction* instr) {
- if (instr->IsCall()) {
- EnsureSpaceForLazyDeopt(Deoptimizer::patch_size());
- }
- if (!instr->IsLazyBailout() && !instr->IsGap()) {
- safepoints_.BumpLastLazySafepointIndex();
- }
-}
-
-
-void LCodeGen::GenerateBodyInstructionPost(LInstruction* instr) {
- if (FLAG_debug_code && FLAG_enable_slow_asserts && instr->HasResult() &&
- instr->hydrogen_value()->representation().IsInteger32() &&
- instr->result()->IsRegister()) {
- __ AssertZeroExtended(ToRegister(instr->result()));
- }
-
- if (instr->HasResult() && instr->MustSignExtendResult(chunk())) {
- // We sign extend the dehoisted key at the definition point when the pointer
- // size is 64-bit. For x32 port, we sign extend the dehoisted key at the use
- // points and MustSignExtendResult is always false. We can't use
- // STATIC_ASSERT here as the pointer size is 32-bit for x32.
- DCHECK(kPointerSize == kInt64Size);
- if (instr->result()->IsRegister()) {
- Register result_reg = ToRegister(instr->result());
- __ movsxlq(result_reg, result_reg);
- } else {
- // Sign extend the 32bit result in the stack slots.
- DCHECK(instr->result()->IsStackSlot());
- Operand src = ToOperand(instr->result());
- __ movsxlq(kScratchRegister, src);
- __ movq(src, kScratchRegister);
- }
- }
-}
-
-
-bool LCodeGen::GenerateJumpTable() {
- if (jump_table_.length() == 0) return !is_aborted();
-
- Label needs_frame;
- Comment(";;; -------------------- Jump table --------------------");
- for (int i = 0; i < jump_table_.length(); i++) {
- Deoptimizer::JumpTableEntry* table_entry = &jump_table_[i];
- __ bind(&table_entry->label);
- Address entry = table_entry->address;
- DeoptComment(table_entry->deopt_info);
- if (table_entry->needs_frame) {
- DCHECK(!info()->saves_caller_doubles());
- __ Move(kScratchRegister, ExternalReference::ForDeoptEntry(entry));
- __ call(&needs_frame);
- } else {
- if (info()->saves_caller_doubles()) {
- DCHECK(info()->IsStub());
- RestoreCallerDoubles();
- }
- __ call(entry, RelocInfo::RUNTIME_ENTRY);
- }
- info()->LogDeoptCallPosition(masm()->pc_offset(),
- table_entry->deopt_info.inlining_id);
- }
-
- if (needs_frame.is_linked()) {
- __ bind(&needs_frame);
- /* stack layout
- 4: return address <-- rsp
- 3: garbage
- 2: garbage
- 1: garbage
- 0: garbage
- */
- // Reserve space for context and stub marker.
- __ subp(rsp, Immediate(2 * kPointerSize));
- __ Push(MemOperand(rsp, 2 * kPointerSize)); // Copy return address.
- __ Push(kScratchRegister); // Save entry address for ret(0)
-
- /* stack layout
- 4: return address
- 3: garbage
- 2: garbage
- 1: return address
- 0: entry address <-- rsp
- */
-
- // Remember context pointer.
- __ movp(kScratchRegister,
- MemOperand(rbp, StandardFrameConstants::kContextOffset));
- // Save context pointer into the stack frame.
- __ movp(MemOperand(rsp, 3 * kPointerSize), kScratchRegister);
-
- // Create a stack frame.
- __ movp(MemOperand(rsp, 4 * kPointerSize), rbp);
- __ leap(rbp, MemOperand(rsp, 4 * kPointerSize));
-
- // This variant of deopt can only be used with stubs. Since we don't
- // have a function pointer to install in the stack frame that we're
- // building, install a special marker there instead.
- DCHECK(info()->IsStub());
- __ Move(MemOperand(rsp, 2 * kPointerSize), Smi::FromInt(StackFrame::STUB));
-
- /* stack layout
- 4: old rbp
- 3: context pointer
- 2: stub marker
- 1: return address
- 0: entry address <-- rsp
- */
- __ ret(0);
- }
-
- return !is_aborted();
-}
-
-
-bool LCodeGen::GenerateDeferredCode() {
- DCHECK(is_generating());
- if (deferred_.length() > 0) {
- for (int i = 0; !is_aborted() && i < deferred_.length(); i++) {
- LDeferredCode* code = deferred_[i];
-
- HValue* value =
- instructions_->at(code->instruction_index())->hydrogen_value();
- RecordAndWritePosition(
- chunk()->graph()->SourcePositionToScriptPosition(value->position()));
-
- Comment(";;; <@%d,#%d> "
- "-------------------- Deferred %s --------------------",
- code->instruction_index(),
- code->instr()->hydrogen_value()->id(),
- code->instr()->Mnemonic());
- __ bind(code->entry());
- if (NeedsDeferredFrame()) {
- Comment(";;; Build frame");
- DCHECK(!frame_is_built_);
- DCHECK(info()->IsStub());
- frame_is_built_ = true;
- // Build the frame in such a way that esi isn't trashed.
- __ pushq(rbp); // Caller's frame pointer.
- __ Push(Operand(rbp, StandardFrameConstants::kContextOffset));
- __ Push(Smi::FromInt(StackFrame::STUB));
- __ leap(rbp, Operand(rsp, 2 * kPointerSize));
- Comment(";;; Deferred code");
- }
- code->Generate();
- if (NeedsDeferredFrame()) {
- __ bind(code->done());
- Comment(";;; Destroy frame");
- DCHECK(frame_is_built_);
- frame_is_built_ = false;
- __ movp(rsp, rbp);
- __ popq(rbp);
- }
- __ jmp(code->exit());
- }
- }
-
- // Deferred code is the last part of the instruction sequence. Mark
- // the generated code as done unless we bailed out.
- if (!is_aborted()) status_ = DONE;
- return !is_aborted();
-}
-
-
-bool LCodeGen::GenerateSafepointTable() {
- DCHECK(is_done());
- safepoints_.Emit(masm(), GetStackSlotCount());
- return !is_aborted();
-}
-
-
-Register LCodeGen::ToRegister(int index) const {
- return Register::from_code(index);
-}
-
-
-XMMRegister LCodeGen::ToDoubleRegister(int index) const {
- return XMMRegister::from_code(index);
-}
-
-
-Register LCodeGen::ToRegister(LOperand* op) const {
- DCHECK(op->IsRegister());
- return ToRegister(op->index());
-}
-
-
-XMMRegister LCodeGen::ToDoubleRegister(LOperand* op) const {
- DCHECK(op->IsDoubleRegister());
- return ToDoubleRegister(op->index());
-}
-
-
-bool LCodeGen::IsInteger32Constant(LConstantOperand* op) const {
- return chunk_->LookupLiteralRepresentation(op).IsSmiOrInteger32();
-}
-
-
-bool LCodeGen::IsExternalConstant(LConstantOperand* op) const {
- return chunk_->LookupLiteralRepresentation(op).IsExternal();
-}
-
-
-bool LCodeGen::IsDehoistedKeyConstant(LConstantOperand* op) const {
- return op->IsConstantOperand() &&
- chunk_->IsDehoistedKey(chunk_->LookupConstant(op));
-}
-
-
-bool LCodeGen::IsSmiConstant(LConstantOperand* op) const {
- return chunk_->LookupLiteralRepresentation(op).IsSmi();
-}
-
-
-int32_t LCodeGen::ToInteger32(LConstantOperand* op) const {
- return ToRepresentation(op, Representation::Integer32());
-}
-
-
-int32_t LCodeGen::ToRepresentation(LConstantOperand* op,
- const Representation& r) const {
- HConstant* constant = chunk_->LookupConstant(op);
- int32_t value = constant->Integer32Value();
- if (r.IsInteger32()) return value;
- DCHECK(SmiValuesAre31Bits() && r.IsSmiOrTagged());
- return static_cast<int32_t>(reinterpret_cast<intptr_t>(Smi::FromInt(value)));
-}
-
-
-Smi* LCodeGen::ToSmi(LConstantOperand* op) const {
- HConstant* constant = chunk_->LookupConstant(op);
- return Smi::FromInt(constant->Integer32Value());
-}
-
-
-double LCodeGen::ToDouble(LConstantOperand* op) const {
- HConstant* constant = chunk_->LookupConstant(op);
- DCHECK(constant->HasDoubleValue());
- return constant->DoubleValue();
-}
-
-
-ExternalReference LCodeGen::ToExternalReference(LConstantOperand* op) const {
- HConstant* constant = chunk_->LookupConstant(op);
- DCHECK(constant->HasExternalReferenceValue());
- return constant->ExternalReferenceValue();
-}
-
-
-Handle<Object> LCodeGen::ToHandle(LConstantOperand* op) const {
- HConstant* constant = chunk_->LookupConstant(op);
- DCHECK(chunk_->LookupLiteralRepresentation(op).IsSmiOrTagged());
- return constant->handle(isolate());
-}
-
-
-static int ArgumentsOffsetWithoutFrame(int index) {
- DCHECK(index < 0);
- return -(index + 1) * kPointerSize + kPCOnStackSize;
-}
-
-
-Operand LCodeGen::ToOperand(LOperand* op) const {
- // Does not handle registers. In X64 assembler, plain registers are not
- // representable as an Operand.
- DCHECK(op->IsStackSlot() || op->IsDoubleStackSlot());
- if (NeedsEagerFrame()) {
- return Operand(rbp, StackSlotOffset(op->index()));
- } else {
- // Retrieve parameter without eager stack-frame relative to the
- // stack-pointer.
- return Operand(rsp, ArgumentsOffsetWithoutFrame(op->index()));
- }
-}
-
-
-void LCodeGen::WriteTranslation(LEnvironment* environment,
- Translation* translation) {
- if (environment == NULL) return;
-
- // The translation includes one command per value in the environment.
- int translation_size = environment->translation_size();
-
- WriteTranslation(environment->outer(), translation);
- WriteTranslationFrame(environment, translation);
-
- int object_index = 0;
- int dematerialized_index = 0;
- for (int i = 0; i < translation_size; ++i) {
- LOperand* value = environment->values()->at(i);
- AddToTranslation(
- environment, translation, value, environment->HasTaggedValueAt(i),
- environment->HasUint32ValueAt(i), &object_index, &dematerialized_index);
- }
-}
-
-
-void LCodeGen::AddToTranslation(LEnvironment* environment,
- Translation* translation,
- LOperand* op,
- bool is_tagged,
- bool is_uint32,
- int* object_index_pointer,
- int* dematerialized_index_pointer) {
- if (op == LEnvironment::materialization_marker()) {
- int object_index = (*object_index_pointer)++;
- if (environment->ObjectIsDuplicateAt(object_index)) {
- int dupe_of = environment->ObjectDuplicateOfAt(object_index);
- translation->DuplicateObject(dupe_of);
- return;
- }
- int object_length = environment->ObjectLengthAt(object_index);
- if (environment->ObjectIsArgumentsAt(object_index)) {
- translation->BeginArgumentsObject(object_length);
- } else {
- translation->BeginCapturedObject(object_length);
- }
- int dematerialized_index = *dematerialized_index_pointer;
- int env_offset = environment->translation_size() + dematerialized_index;
- *dematerialized_index_pointer += object_length;
- for (int i = 0; i < object_length; ++i) {
- LOperand* value = environment->values()->at(env_offset + i);
- AddToTranslation(environment,
- translation,
- value,
- environment->HasTaggedValueAt(env_offset + i),
- environment->HasUint32ValueAt(env_offset + i),
- object_index_pointer,
- dematerialized_index_pointer);
- }
- return;
- }
-
- if (op->IsStackSlot()) {
- int index = op->index();
- if (index >= 0) {
- index += StandardFrameConstants::kFixedFrameSize / kPointerSize;
- }
- if (is_tagged) {
- translation->StoreStackSlot(index);
- } else if (is_uint32) {
- translation->StoreUint32StackSlot(index);
- } else {
- translation->StoreInt32StackSlot(index);
- }
- } else if (op->IsDoubleStackSlot()) {
- int index = op->index();
- if (index >= 0) {
- index += StandardFrameConstants::kFixedFrameSize / kPointerSize;
- }
- translation->StoreDoubleStackSlot(index);
- } else if (op->IsRegister()) {
- Register reg = ToRegister(op);
- if (is_tagged) {
- translation->StoreRegister(reg);
- } else if (is_uint32) {
- translation->StoreUint32Register(reg);
- } else {
- translation->StoreInt32Register(reg);
- }
- } else if (op->IsDoubleRegister()) {
- XMMRegister reg = ToDoubleRegister(op);
- translation->StoreDoubleRegister(reg);
- } else if (op->IsConstantOperand()) {
- HConstant* constant = chunk()->LookupConstant(LConstantOperand::cast(op));
- int src_index = DefineDeoptimizationLiteral(constant->handle(isolate()));
- translation->StoreLiteral(src_index);
- } else {
- UNREACHABLE();
- }
-}
-
-
-void LCodeGen::CallCodeGeneric(Handle<Code> code,
- RelocInfo::Mode mode,
- LInstruction* instr,
- SafepointMode safepoint_mode,
- int argc) {
- DCHECK(instr != NULL);
- __ call(code, mode);
- RecordSafepointWithLazyDeopt(instr, safepoint_mode, argc);
-
- // Signal that we don't inline smi code before these stubs in the
- // optimizing code generator.
- if (code->kind() == Code::BINARY_OP_IC ||
- code->kind() == Code::COMPARE_IC) {
- __ nop();
- }
-}
-
-
-void LCodeGen::CallCode(Handle<Code> code,
- RelocInfo::Mode mode,
- LInstruction* instr) {
- CallCodeGeneric(code, mode, instr, RECORD_SIMPLE_SAFEPOINT, 0);
-}
-
-
-void LCodeGen::CallRuntime(const Runtime::Function* function,
- int num_arguments,
- LInstruction* instr,
- SaveFPRegsMode save_doubles) {
- DCHECK(instr != NULL);
- DCHECK(instr->HasPointerMap());
-
- __ CallRuntime(function, num_arguments, save_doubles);
-
- RecordSafepointWithLazyDeopt(instr, RECORD_SIMPLE_SAFEPOINT, 0);
-}
-
-
-void LCodeGen::LoadContextFromDeferred(LOperand* context) {
- if (context->IsRegister()) {
- if (!ToRegister(context).is(rsi)) {
- __ movp(rsi, ToRegister(context));
- }
- } else if (context->IsStackSlot()) {
- __ movp(rsi, ToOperand(context));
- } else if (context->IsConstantOperand()) {
- HConstant* constant =
- chunk_->LookupConstant(LConstantOperand::cast(context));
- __ Move(rsi, Handle<Object>::cast(constant->handle(isolate())));
- } else {
- UNREACHABLE();
- }
-}
-
-
-
-void LCodeGen::CallRuntimeFromDeferred(Runtime::FunctionId id,
- int argc,
- LInstruction* instr,
- LOperand* context) {
- LoadContextFromDeferred(context);
-
- __ CallRuntimeSaveDoubles(id);
- RecordSafepointWithRegisters(
- instr->pointer_map(), argc, Safepoint::kNoLazyDeopt);
-}
-
-
-void LCodeGen::RegisterEnvironmentForDeoptimization(LEnvironment* environment,
- Safepoint::DeoptMode mode) {
- environment->set_has_been_used();
- if (!environment->HasBeenRegistered()) {
- // Physical stack frame layout:
- // -x ............. -4 0 ..................................... y
- // [incoming arguments] [spill slots] [pushed outgoing arguments]
-
- // Layout of the environment:
- // 0 ..................................................... size-1
- // [parameters] [locals] [expression stack including arguments]
-
- // Layout of the translation:
- // 0 ........................................................ size - 1 + 4
- // [expression stack including arguments] [locals] [4 words] [parameters]
- // |>------------ translation_size ------------<|
-
- int frame_count = 0;
- int jsframe_count = 0;
- for (LEnvironment* e = environment; e != NULL; e = e->outer()) {
- ++frame_count;
- if (e->frame_type() == JS_FUNCTION) {
- ++jsframe_count;
- }
- }
- Translation translation(&translations_, frame_count, jsframe_count, zone());
- WriteTranslation(environment, &translation);
- int deoptimization_index = deoptimizations_.length();
- int pc_offset = masm()->pc_offset();
- environment->Register(deoptimization_index,
- translation.index(),
- (mode == Safepoint::kLazyDeopt) ? pc_offset : -1);
- deoptimizations_.Add(environment, environment->zone());
- }
-}
-
-
-void LCodeGen::DeoptimizeIf(Condition cc, LInstruction* instr,
- Deoptimizer::DeoptReason deopt_reason,
- Deoptimizer::BailoutType bailout_type) {
- LEnvironment* environment = instr->environment();
- RegisterEnvironmentForDeoptimization(environment, Safepoint::kNoLazyDeopt);
- DCHECK(environment->HasBeenRegistered());
- int id = environment->deoptimization_index();
- Address entry =
- Deoptimizer::GetDeoptimizationEntry(isolate(), id, bailout_type);
- if (entry == NULL) {
- Abort(kBailoutWasNotPrepared);
- return;
- }
-
- if (DeoptEveryNTimes()) {
- ExternalReference count = ExternalReference::stress_deopt_count(isolate());
- Label no_deopt;
- __ pushfq();
- __ pushq(rax);
- Operand count_operand = masm()->ExternalOperand(count, kScratchRegister);
- __ movl(rax, count_operand);
- __ subl(rax, Immediate(1));
- __ j(not_zero, &no_deopt, Label::kNear);
- if (FLAG_trap_on_deopt) __ int3();
- __ movl(rax, Immediate(FLAG_deopt_every_n_times));
- __ movl(count_operand, rax);
- __ popq(rax);
- __ popfq();
- DCHECK(frame_is_built_);
- __ call(entry, RelocInfo::RUNTIME_ENTRY);
- __ bind(&no_deopt);
- __ movl(count_operand, rax);
- __ popq(rax);
- __ popfq();
- }
-
- if (info()->ShouldTrapOnDeopt()) {
- Label done;
- if (cc != no_condition) {
- __ j(NegateCondition(cc), &done, Label::kNear);
- }
- __ int3();
- __ bind(&done);
- }
-
- Deoptimizer::DeoptInfo deopt_info = MakeDeoptInfo(instr, deopt_reason);
-
- DCHECK(info()->IsStub() || frame_is_built_);
- // Go through jump table if we need to handle condition, build frame, or
- // restore caller doubles.
- if (cc == no_condition && frame_is_built_ &&
- !info()->saves_caller_doubles()) {
- DeoptComment(deopt_info);
- __ call(entry, RelocInfo::RUNTIME_ENTRY);
- info()->LogDeoptCallPosition(masm()->pc_offset(), deopt_info.inlining_id);
- } else {
- Deoptimizer::JumpTableEntry table_entry(entry, deopt_info, bailout_type,
- !frame_is_built_);
- // We often have several deopts to the same entry, reuse the last
- // jump entry if this is the case.
- if (FLAG_trace_deopt || isolate()->cpu_profiler()->is_profiling() ||
- jump_table_.is_empty() ||
- !table_entry.IsEquivalentTo(jump_table_.last())) {
- jump_table_.Add(table_entry, zone());
- }
- if (cc == no_condition) {
- __ jmp(&jump_table_.last().label);
- } else {
- __ j(cc, &jump_table_.last().label);
- }
- }
-}
-
-
-void LCodeGen::DeoptimizeIf(Condition cc, LInstruction* instr,
- Deoptimizer::DeoptReason deopt_reason) {
- Deoptimizer::BailoutType bailout_type = info()->IsStub()
- ? Deoptimizer::LAZY
- : Deoptimizer::EAGER;
- DeoptimizeIf(cc, instr, deopt_reason, bailout_type);
-}
-
-
-void LCodeGen::PopulateDeoptimizationData(Handle<Code> code) {
- int length = deoptimizations_.length();
- if (length == 0) return;
- Handle<DeoptimizationInputData> data =
- DeoptimizationInputData::New(isolate(), length, TENURED);
-
- Handle<ByteArray> translations =
- translations_.CreateByteArray(isolate()->factory());
- data->SetTranslationByteArray(*translations);
- data->SetInlinedFunctionCount(Smi::FromInt(inlined_function_count_));
- data->SetOptimizationId(Smi::FromInt(info_->optimization_id()));
- if (info_->IsOptimizing()) {
- // Reference to shared function info does not change between phases.
- AllowDeferredHandleDereference allow_handle_dereference;
- data->SetSharedFunctionInfo(*info_->shared_info());
- } else {
- data->SetSharedFunctionInfo(Smi::FromInt(0));
- }
- data->SetWeakCellCache(Smi::FromInt(0));
-
- Handle<FixedArray> literals =
- factory()->NewFixedArray(deoptimization_literals_.length(), TENURED);
- { AllowDeferredHandleDereference copy_handles;
- for (int i = 0; i < deoptimization_literals_.length(); i++) {
- literals->set(i, *deoptimization_literals_[i]);
- }
- data->SetLiteralArray(*literals);
- }
-
- data->SetOsrAstId(Smi::FromInt(info_->osr_ast_id().ToInt()));
- data->SetOsrPcOffset(Smi::FromInt(osr_pc_offset_));
-
- // Populate the deoptimization entries.
- for (int i = 0; i < length; i++) {
- LEnvironment* env = deoptimizations_[i];
- data->SetAstId(i, env->ast_id());
- data->SetTranslationIndex(i, Smi::FromInt(env->translation_index()));
- data->SetArgumentsStackHeight(i,
- Smi::FromInt(env->arguments_stack_height()));
- data->SetPc(i, Smi::FromInt(env->pc_offset()));
- }
- code->set_deoptimization_data(*data);
-}
-
-
-void LCodeGen::PopulateDeoptimizationLiteralsWithInlinedFunctions() {
- DCHECK_EQ(0, deoptimization_literals_.length());
- for (auto function : chunk()->inlined_functions()) {
- DefineDeoptimizationLiteral(function);
- }
- inlined_function_count_ = deoptimization_literals_.length();
-}
-
-
-void LCodeGen::RecordSafepointWithLazyDeopt(
- LInstruction* instr, SafepointMode safepoint_mode, int argc) {
- if (safepoint_mode == RECORD_SIMPLE_SAFEPOINT) {
- RecordSafepoint(instr->pointer_map(), Safepoint::kLazyDeopt);
- } else {
- DCHECK(safepoint_mode == RECORD_SAFEPOINT_WITH_REGISTERS);
- RecordSafepointWithRegisters(
- instr->pointer_map(), argc, Safepoint::kLazyDeopt);
- }
-}
-
-
-void LCodeGen::RecordSafepoint(
- LPointerMap* pointers,
- Safepoint::Kind kind,
- int arguments,
- Safepoint::DeoptMode deopt_mode) {
- DCHECK(kind == expected_safepoint_kind_);
-
- const ZoneList<LOperand*>* operands = pointers->GetNormalizedOperands();
-
- Safepoint safepoint = safepoints_.DefineSafepoint(masm(),
- kind, arguments, deopt_mode);
- for (int i = 0; i < operands->length(); i++) {
- LOperand* pointer = operands->at(i);
- if (pointer->IsStackSlot()) {
- safepoint.DefinePointerSlot(pointer->index(), zone());
- } else if (pointer->IsRegister() && (kind & Safepoint::kWithRegisters)) {
- safepoint.DefinePointerRegister(ToRegister(pointer), zone());
- }
- }
-}
-
-
-void LCodeGen::RecordSafepoint(LPointerMap* pointers,
- Safepoint::DeoptMode deopt_mode) {
- RecordSafepoint(pointers, Safepoint::kSimple, 0, deopt_mode);
-}
-
-
-void LCodeGen::RecordSafepoint(Safepoint::DeoptMode deopt_mode) {
- LPointerMap empty_pointers(zone());
- RecordSafepoint(&empty_pointers, deopt_mode);
-}
-
-
-void LCodeGen::RecordSafepointWithRegisters(LPointerMap* pointers,
- int arguments,
- Safepoint::DeoptMode deopt_mode) {
- RecordSafepoint(pointers, Safepoint::kWithRegisters, arguments, deopt_mode);
-}
-
-
-void LCodeGen::RecordAndWritePosition(int position) {
- if (position == RelocInfo::kNoPosition) return;
- masm()->positions_recorder()->RecordPosition(position);
- masm()->positions_recorder()->WriteRecordedPositions();
-}
-
-
-static const char* LabelType(LLabel* label) {
- if (label->is_loop_header()) return " (loop header)";
- if (label->is_osr_entry()) return " (OSR entry)";
- return "";
-}
-
-
-void LCodeGen::DoLabel(LLabel* label) {
- Comment(";;; <@%d,#%d> -------------------- B%d%s --------------------",
- current_instruction_,
- label->hydrogen_value()->id(),
- label->block_id(),
- LabelType(label));
- __ bind(label->label());
- current_block_ = label->block_id();
- DoGap(label);
-}
-
-
-void LCodeGen::DoParallelMove(LParallelMove* move) {
- resolver_.Resolve(move);
-}
-
-
-void LCodeGen::DoGap(LGap* gap) {
- for (int i = LGap::FIRST_INNER_POSITION;
- i <= LGap::LAST_INNER_POSITION;
- i++) {
- LGap::InnerPosition inner_pos = static_cast<LGap::InnerPosition>(i);
- LParallelMove* move = gap->GetParallelMove(inner_pos);
- if (move != NULL) DoParallelMove(move);
- }
-}
-
-
-void LCodeGen::DoInstructionGap(LInstructionGap* instr) {
- DoGap(instr);
-}
-
-
-void LCodeGen::DoParameter(LParameter* instr) {
- // Nothing to do.
-}
-
-
-void LCodeGen::DoCallStub(LCallStub* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- DCHECK(ToRegister(instr->result()).is(rax));
- switch (instr->hydrogen()->major_key()) {
- case CodeStub::RegExpExec: {
- RegExpExecStub stub(isolate());
- CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
- break;
- }
- case CodeStub::SubString: {
- SubStringStub stub(isolate());
- CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
- break;
- }
- default:
- UNREACHABLE();
- }
-}
-
-
-void LCodeGen::DoUnknownOSRValue(LUnknownOSRValue* instr) {
- GenerateOsrPrologue();
-}
-
-
-void LCodeGen::DoModByPowerOf2I(LModByPowerOf2I* instr) {
- Register dividend = ToRegister(instr->dividend());
- int32_t divisor = instr->divisor();
- DCHECK(dividend.is(ToRegister(instr->result())));
-
- // Theoretically, a variation of the branch-free code for integer division by
- // a power of 2 (calculating the remainder via an additional multiplication
- // (which gets simplified to an 'and') and subtraction) should be faster, and
- // this is exactly what GCC and clang emit. Nevertheless, benchmarks seem to
- // indicate that positive dividends are heavily favored, so the branching
- // version performs better.
- HMod* hmod = instr->hydrogen();
- int32_t mask = divisor < 0 ? -(divisor + 1) : (divisor - 1);
- Label dividend_is_not_negative, done;
- if (hmod->CheckFlag(HValue::kLeftCanBeNegative)) {
- __ testl(dividend, dividend);
- __ j(not_sign, &dividend_is_not_negative, Label::kNear);
- // Note that this is correct even for kMinInt operands.
- __ negl(dividend);
- __ andl(dividend, Immediate(mask));
- __ negl(dividend);
- if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) {
- DeoptimizeIf(zero, instr, Deoptimizer::kMinusZero);
- }
- __ jmp(&done, Label::kNear);
- }
-
- __ bind(&dividend_is_not_negative);
- __ andl(dividend, Immediate(mask));
- __ bind(&done);
-}
-
-
-void LCodeGen::DoModByConstI(LModByConstI* instr) {
- Register dividend = ToRegister(instr->dividend());
- int32_t divisor = instr->divisor();
- DCHECK(ToRegister(instr->result()).is(rax));
-
- if (divisor == 0) {
- DeoptimizeIf(no_condition, instr, Deoptimizer::kDivisionByZero);
- return;
- }
-
- __ TruncatingDiv(dividend, Abs(divisor));
- __ imull(rdx, rdx, Immediate(Abs(divisor)));
- __ movl(rax, dividend);
- __ subl(rax, rdx);
-
- // Check for negative zero.
- HMod* hmod = instr->hydrogen();
- if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) {
- Label remainder_not_zero;
- __ j(not_zero, &remainder_not_zero, Label::kNear);
- __ cmpl(dividend, Immediate(0));
- DeoptimizeIf(less, instr, Deoptimizer::kMinusZero);
- __ bind(&remainder_not_zero);
- }
-}
-
-
-void LCodeGen::DoModI(LModI* instr) {
- HMod* hmod = instr->hydrogen();
-
- Register left_reg = ToRegister(instr->left());
- DCHECK(left_reg.is(rax));
- Register right_reg = ToRegister(instr->right());
- DCHECK(!right_reg.is(rax));
- DCHECK(!right_reg.is(rdx));
- Register result_reg = ToRegister(instr->result());
- DCHECK(result_reg.is(rdx));
-
- Label done;
- // Check for x % 0, idiv would signal a divide error. We have to
- // deopt in this case because we can't return a NaN.
- if (hmod->CheckFlag(HValue::kCanBeDivByZero)) {
- __ testl(right_reg, right_reg);
- DeoptimizeIf(zero, instr, Deoptimizer::kDivisionByZero);
- }
-
- // Check for kMinInt % -1, idiv would signal a divide error. We
- // have to deopt if we care about -0, because we can't return that.
- if (hmod->CheckFlag(HValue::kCanOverflow)) {
- Label no_overflow_possible;
- __ cmpl(left_reg, Immediate(kMinInt));
- __ j(not_zero, &no_overflow_possible, Label::kNear);
- __ cmpl(right_reg, Immediate(-1));
- if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) {
- DeoptimizeIf(equal, instr, Deoptimizer::kMinusZero);
- } else {
- __ j(not_equal, &no_overflow_possible, Label::kNear);
- __ Set(result_reg, 0);
- __ jmp(&done, Label::kNear);
- }
- __ bind(&no_overflow_possible);
- }
-
- // Sign extend dividend in eax into edx:eax, since we are using only the low
- // 32 bits of the values.
- __ cdq();
-
- // If we care about -0, test if the dividend is <0 and the result is 0.
- if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) {
- Label positive_left;
- __ testl(left_reg, left_reg);
- __ j(not_sign, &positive_left, Label::kNear);
- __ idivl(right_reg);
- __ testl(result_reg, result_reg);
- DeoptimizeIf(zero, instr, Deoptimizer::kMinusZero);
- __ jmp(&done, Label::kNear);
- __ bind(&positive_left);
- }
- __ idivl(right_reg);
- __ bind(&done);
-}
-
-
-void LCodeGen::DoFlooringDivByPowerOf2I(LFlooringDivByPowerOf2I* instr) {
- Register dividend = ToRegister(instr->dividend());
- int32_t divisor = instr->divisor();
- DCHECK(dividend.is(ToRegister(instr->result())));
-
- // If the divisor is positive, things are easy: There can be no deopts and we
- // can simply do an arithmetic right shift.
- if (divisor == 1) return;
- int32_t shift = WhichPowerOf2Abs(divisor);
- if (divisor > 1) {
- __ sarl(dividend, Immediate(shift));
- return;
- }
-
- // If the divisor is negative, we have to negate and handle edge cases.
- __ negl(dividend);
- if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
- DeoptimizeIf(zero, instr, Deoptimizer::kMinusZero);
- }
-
- // Dividing by -1 is basically negation, unless we overflow.
- if (divisor == -1) {
- if (instr->hydrogen()->CheckFlag(HValue::kLeftCanBeMinInt)) {
- DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow);
- }
- return;
- }
-
- // If the negation could not overflow, simply shifting is OK.
- if (!instr->hydrogen()->CheckFlag(HValue::kLeftCanBeMinInt)) {
- __ sarl(dividend, Immediate(shift));
- return;
- }
-
- Label not_kmin_int, done;
- __ j(no_overflow, &not_kmin_int, Label::kNear);
- __ movl(dividend, Immediate(kMinInt / divisor));
- __ jmp(&done, Label::kNear);
- __ bind(&not_kmin_int);
- __ sarl(dividend, Immediate(shift));
- __ bind(&done);
-}
-
-
-void LCodeGen::DoFlooringDivByConstI(LFlooringDivByConstI* instr) {
- Register dividend = ToRegister(instr->dividend());
- int32_t divisor = instr->divisor();
- DCHECK(ToRegister(instr->result()).is(rdx));
-
- if (divisor == 0) {
- DeoptimizeIf(no_condition, instr, Deoptimizer::kDivisionByZero);
- return;
- }
-
- // Check for (0 / -x) that will produce negative zero.
- HMathFloorOfDiv* hdiv = instr->hydrogen();
- if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) {
- __ testl(dividend, dividend);
- DeoptimizeIf(zero, instr, Deoptimizer::kMinusZero);
- }
-
- // Easy case: We need no dynamic check for the dividend and the flooring
- // division is the same as the truncating division.
- if ((divisor > 0 && !hdiv->CheckFlag(HValue::kLeftCanBeNegative)) ||
- (divisor < 0 && !hdiv->CheckFlag(HValue::kLeftCanBePositive))) {
- __ TruncatingDiv(dividend, Abs(divisor));
- if (divisor < 0) __ negl(rdx);
- return;
- }
-
- // In the general case we may need to adjust before and after the truncating
- // division to get a flooring division.
- Register temp = ToRegister(instr->temp3());
- DCHECK(!temp.is(dividend) && !temp.is(rax) && !temp.is(rdx));
- Label needs_adjustment, done;
- __ cmpl(dividend, Immediate(0));
- __ j(divisor > 0 ? less : greater, &needs_adjustment, Label::kNear);
- __ TruncatingDiv(dividend, Abs(divisor));
- if (divisor < 0) __ negl(rdx);
- __ jmp(&done, Label::kNear);
- __ bind(&needs_adjustment);
- __ leal(temp, Operand(dividend, divisor > 0 ? 1 : -1));
- __ TruncatingDiv(temp, Abs(divisor));
- if (divisor < 0) __ negl(rdx);
- __ decl(rdx);
- __ bind(&done);
-}
-
-
-// TODO(svenpanne) Refactor this to avoid code duplication with DoDivI.
-void LCodeGen::DoFlooringDivI(LFlooringDivI* instr) {
- HBinaryOperation* hdiv = instr->hydrogen();
- Register dividend = ToRegister(instr->dividend());
- Register divisor = ToRegister(instr->divisor());
- Register remainder = ToRegister(instr->temp());
- Register result = ToRegister(instr->result());
- DCHECK(dividend.is(rax));
- DCHECK(remainder.is(rdx));
- DCHECK(result.is(rax));
- DCHECK(!divisor.is(rax));
- DCHECK(!divisor.is(rdx));
-
- // Check for x / 0.
- if (hdiv->CheckFlag(HValue::kCanBeDivByZero)) {
- __ testl(divisor, divisor);
- DeoptimizeIf(zero, instr, Deoptimizer::kDivisionByZero);
- }
-
- // Check for (0 / -x) that will produce negative zero.
- if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero)) {
- Label dividend_not_zero;
- __ testl(dividend, dividend);
- __ j(not_zero, &dividend_not_zero, Label::kNear);
- __ testl(divisor, divisor);
- DeoptimizeIf(sign, instr, Deoptimizer::kMinusZero);
- __ bind(&dividend_not_zero);
- }
-
- // Check for (kMinInt / -1).
- if (hdiv->CheckFlag(HValue::kCanOverflow)) {
- Label dividend_not_min_int;
- __ cmpl(dividend, Immediate(kMinInt));
- __ j(not_zero, &dividend_not_min_int, Label::kNear);
- __ cmpl(divisor, Immediate(-1));
- DeoptimizeIf(zero, instr, Deoptimizer::kOverflow);
- __ bind(&dividend_not_min_int);
- }
-
- // Sign extend to rdx (= remainder).
- __ cdq();
- __ idivl(divisor);
-
- Label done;
- __ testl(remainder, remainder);
- __ j(zero, &done, Label::kNear);
- __ xorl(remainder, divisor);
- __ sarl(remainder, Immediate(31));
- __ addl(result, remainder);
- __ bind(&done);
-}
-
-
-void LCodeGen::DoDivByPowerOf2I(LDivByPowerOf2I* instr) {
- Register dividend = ToRegister(instr->dividend());
- int32_t divisor = instr->divisor();
- Register result = ToRegister(instr->result());
- DCHECK(divisor == kMinInt || base::bits::IsPowerOfTwo32(Abs(divisor)));
- DCHECK(!result.is(dividend));
-
- // Check for (0 / -x) that will produce negative zero.
- HDiv* hdiv = instr->hydrogen();
- if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) {
- __ testl(dividend, dividend);
- DeoptimizeIf(zero, instr, Deoptimizer::kMinusZero);
- }
- // Check for (kMinInt / -1).
- if (hdiv->CheckFlag(HValue::kCanOverflow) && divisor == -1) {
- __ cmpl(dividend, Immediate(kMinInt));
- DeoptimizeIf(zero, instr, Deoptimizer::kOverflow);
- }
- // Deoptimize if remainder will not be 0.
- if (!hdiv->CheckFlag(HInstruction::kAllUsesTruncatingToInt32) &&
- divisor != 1 && divisor != -1) {
- int32_t mask = divisor < 0 ? -(divisor + 1) : (divisor - 1);
- __ testl(dividend, Immediate(mask));
- DeoptimizeIf(not_zero, instr, Deoptimizer::kLostPrecision);
- }
- __ Move(result, dividend);
- int32_t shift = WhichPowerOf2Abs(divisor);
- if (shift > 0) {
- // The arithmetic shift is always OK, the 'if' is an optimization only.
- if (shift > 1) __ sarl(result, Immediate(31));
- __ shrl(result, Immediate(32 - shift));
- __ addl(result, dividend);
- __ sarl(result, Immediate(shift));
- }
- if (divisor < 0) __ negl(result);
-}
-
-
-void LCodeGen::DoDivByConstI(LDivByConstI* instr) {
- Register dividend = ToRegister(instr->dividend());
- int32_t divisor = instr->divisor();
- DCHECK(ToRegister(instr->result()).is(rdx));
-
- if (divisor == 0) {
- DeoptimizeIf(no_condition, instr, Deoptimizer::kDivisionByZero);
- return;
- }
-
- // Check for (0 / -x) that will produce negative zero.
- HDiv* hdiv = instr->hydrogen();
- if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) {
- __ testl(dividend, dividend);
- DeoptimizeIf(zero, instr, Deoptimizer::kMinusZero);
- }
-
- __ TruncatingDiv(dividend, Abs(divisor));
- if (divisor < 0) __ negl(rdx);
-
- if (!hdiv->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)) {
- __ movl(rax, rdx);
- __ imull(rax, rax, Immediate(divisor));
- __ subl(rax, dividend);
- DeoptimizeIf(not_equal, instr, Deoptimizer::kLostPrecision);
- }
-}
-
-
-// TODO(svenpanne) Refactor this to avoid code duplication with DoFlooringDivI.
-void LCodeGen::DoDivI(LDivI* instr) {
- HBinaryOperation* hdiv = instr->hydrogen();
- Register dividend = ToRegister(instr->dividend());
- Register divisor = ToRegister(instr->divisor());
- Register remainder = ToRegister(instr->temp());
- DCHECK(dividend.is(rax));
- DCHECK(remainder.is(rdx));
- DCHECK(ToRegister(instr->result()).is(rax));
- DCHECK(!divisor.is(rax));
- DCHECK(!divisor.is(rdx));
-
- // Check for x / 0.
- if (hdiv->CheckFlag(HValue::kCanBeDivByZero)) {
- __ testl(divisor, divisor);
- DeoptimizeIf(zero, instr, Deoptimizer::kDivisionByZero);
- }
-
- // Check for (0 / -x) that will produce negative zero.
- if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero)) {
- Label dividend_not_zero;
- __ testl(dividend, dividend);
- __ j(not_zero, &dividend_not_zero, Label::kNear);
- __ testl(divisor, divisor);
- DeoptimizeIf(sign, instr, Deoptimizer::kMinusZero);
- __ bind(&dividend_not_zero);
- }
-
- // Check for (kMinInt / -1).
- if (hdiv->CheckFlag(HValue::kCanOverflow)) {
- Label dividend_not_min_int;
- __ cmpl(dividend, Immediate(kMinInt));
- __ j(not_zero, &dividend_not_min_int, Label::kNear);
- __ cmpl(divisor, Immediate(-1));
- DeoptimizeIf(zero, instr, Deoptimizer::kOverflow);
- __ bind(&dividend_not_min_int);
- }
-
- // Sign extend to rdx (= remainder).
- __ cdq();
- __ idivl(divisor);
-
- if (!hdiv->CheckFlag(HValue::kAllUsesTruncatingToInt32)) {
- // Deoptimize if remainder is not 0.
- __ testl(remainder, remainder);
- DeoptimizeIf(not_zero, instr, Deoptimizer::kLostPrecision);
- }
-}
-
-
-void LCodeGen::DoMulI(LMulI* instr) {
- Register left = ToRegister(instr->left());
- LOperand* right = instr->right();
-
- if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
- if (instr->hydrogen_value()->representation().IsSmi()) {
- __ movp(kScratchRegister, left);
- } else {
- __ movl(kScratchRegister, left);
- }
- }
-
- bool can_overflow =
- instr->hydrogen()->CheckFlag(HValue::kCanOverflow);
- if (right->IsConstantOperand()) {
- int32_t right_value = ToInteger32(LConstantOperand::cast(right));
- if (right_value == -1) {
- __ negl(left);
- } else if (right_value == 0) {
- __ xorl(left, left);
- } else if (right_value == 2) {
- __ addl(left, left);
- } else if (!can_overflow) {
- // If the multiplication is known to not overflow, we
- // can use operations that don't set the overflow flag
- // correctly.
- switch (right_value) {
- case 1:
- // Do nothing.
- break;
- case 3:
- __ leal(left, Operand(left, left, times_2, 0));
- break;
- case 4:
- __ shll(left, Immediate(2));
- break;
- case 5:
- __ leal(left, Operand(left, left, times_4, 0));
- break;
- case 8:
- __ shll(left, Immediate(3));
- break;
- case 9:
- __ leal(left, Operand(left, left, times_8, 0));
- break;
- case 16:
- __ shll(left, Immediate(4));
- break;
- default:
- __ imull(left, left, Immediate(right_value));
- break;
- }
- } else {
- __ imull(left, left, Immediate(right_value));
- }
- } else if (right->IsStackSlot()) {
- if (instr->hydrogen_value()->representation().IsSmi()) {
- __ SmiToInteger64(left, left);
- __ imulp(left, ToOperand(right));
- } else {
- __ imull(left, ToOperand(right));
- }
- } else {
- if (instr->hydrogen_value()->representation().IsSmi()) {
- __ SmiToInteger64(left, left);
- __ imulp(left, ToRegister(right));
- } else {
- __ imull(left, ToRegister(right));
- }
- }
-
- if (can_overflow) {
- DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow);
- }
-
- if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
- // Bail out if the result is supposed to be negative zero.
- Label done;
- if (instr->hydrogen_value()->representation().IsSmi()) {
- __ testp(left, left);
- } else {
- __ testl(left, left);
- }
- __ j(not_zero, &done, Label::kNear);
- if (right->IsConstantOperand()) {
- // Constant can't be represented as 32-bit Smi due to immediate size
- // limit.
- DCHECK(SmiValuesAre32Bits()
- ? !instr->hydrogen_value()->representation().IsSmi()
- : SmiValuesAre31Bits());
- if (ToInteger32(LConstantOperand::cast(right)) < 0) {
- DeoptimizeIf(no_condition, instr, Deoptimizer::kMinusZero);
- } else if (ToInteger32(LConstantOperand::cast(right)) == 0) {
- __ cmpl(kScratchRegister, Immediate(0));
- DeoptimizeIf(less, instr, Deoptimizer::kMinusZero);
- }
- } else if (right->IsStackSlot()) {
- if (instr->hydrogen_value()->representation().IsSmi()) {
- __ orp(kScratchRegister, ToOperand(right));
- } else {
- __ orl(kScratchRegister, ToOperand(right));
- }
- DeoptimizeIf(sign, instr, Deoptimizer::kMinusZero);
- } else {
- // Test the non-zero operand for negative sign.
- if (instr->hydrogen_value()->representation().IsSmi()) {
- __ orp(kScratchRegister, ToRegister(right));
- } else {
- __ orl(kScratchRegister, ToRegister(right));
- }
- DeoptimizeIf(sign, instr, Deoptimizer::kMinusZero);
- }
- __ bind(&done);
- }
-}
-
-
-void LCodeGen::DoBitI(LBitI* instr) {
- LOperand* left = instr->left();
- LOperand* right = instr->right();
- DCHECK(left->Equals(instr->result()));
- DCHECK(left->IsRegister());
-
- if (right->IsConstantOperand()) {
- int32_t right_operand =
- ToRepresentation(LConstantOperand::cast(right),
- instr->hydrogen()->right()->representation());
- switch (instr->op()) {
- case Token::BIT_AND:
- __ andl(ToRegister(left), Immediate(right_operand));
- break;
- case Token::BIT_OR:
- __ orl(ToRegister(left), Immediate(right_operand));
- break;
- case Token::BIT_XOR:
- if (right_operand == int32_t(~0)) {
- __ notl(ToRegister(left));
- } else {
- __ xorl(ToRegister(left), Immediate(right_operand));
- }
- break;
- default:
- UNREACHABLE();
- break;
- }
- } else if (right->IsStackSlot()) {
- switch (instr->op()) {
- case Token::BIT_AND:
- if (instr->IsInteger32()) {
- __ andl(ToRegister(left), ToOperand(right));
- } else {
- __ andp(ToRegister(left), ToOperand(right));
- }
- break;
- case Token::BIT_OR:
- if (instr->IsInteger32()) {
- __ orl(ToRegister(left), ToOperand(right));
- } else {
- __ orp(ToRegister(left), ToOperand(right));
- }
- break;
- case Token::BIT_XOR:
- if (instr->IsInteger32()) {
- __ xorl(ToRegister(left), ToOperand(right));
- } else {
- __ xorp(ToRegister(left), ToOperand(right));
- }
- break;
- default:
- UNREACHABLE();
- break;
- }
- } else {
- DCHECK(right->IsRegister());
- switch (instr->op()) {
- case Token::BIT_AND:
- if (instr->IsInteger32()) {
- __ andl(ToRegister(left), ToRegister(right));
- } else {
- __ andp(ToRegister(left), ToRegister(right));
- }
- break;
- case Token::BIT_OR:
- if (instr->IsInteger32()) {
- __ orl(ToRegister(left), ToRegister(right));
- } else {
- __ orp(ToRegister(left), ToRegister(right));
- }
- break;
- case Token::BIT_XOR:
- if (instr->IsInteger32()) {
- __ xorl(ToRegister(left), ToRegister(right));
- } else {
- __ xorp(ToRegister(left), ToRegister(right));
- }
- break;
- default:
- UNREACHABLE();
- break;
- }
- }
-}
-
-
-void LCodeGen::DoShiftI(LShiftI* instr) {
- LOperand* left = instr->left();
- LOperand* right = instr->right();
- DCHECK(left->Equals(instr->result()));
- DCHECK(left->IsRegister());
- if (right->IsRegister()) {
- DCHECK(ToRegister(right).is(rcx));
-
- switch (instr->op()) {
- case Token::ROR:
- __ rorl_cl(ToRegister(left));
- break;
- case Token::SAR:
- __ sarl_cl(ToRegister(left));
- break;
- case Token::SHR:
- __ shrl_cl(ToRegister(left));
- if (instr->can_deopt()) {
- __ testl(ToRegister(left), ToRegister(left));
- DeoptimizeIf(negative, instr, Deoptimizer::kNegativeValue);
- }
- break;
- case Token::SHL:
- __ shll_cl(ToRegister(left));
- break;
- default:
- UNREACHABLE();
- break;
- }
- } else {
- int32_t value = ToInteger32(LConstantOperand::cast(right));
- uint8_t shift_count = static_cast<uint8_t>(value & 0x1F);
- switch (instr->op()) {
- case Token::ROR:
- if (shift_count != 0) {
- __ rorl(ToRegister(left), Immediate(shift_count));
- }
- break;
- case Token::SAR:
- if (shift_count != 0) {
- __ sarl(ToRegister(left), Immediate(shift_count));
- }
- break;
- case Token::SHR:
- if (shift_count != 0) {
- __ shrl(ToRegister(left), Immediate(shift_count));
- } else if (instr->can_deopt()) {
- __ testl(ToRegister(left), ToRegister(left));
- DeoptimizeIf(negative, instr, Deoptimizer::kNegativeValue);
- }
- break;
- case Token::SHL:
- if (shift_count != 0) {
- if (instr->hydrogen_value()->representation().IsSmi()) {
- if (SmiValuesAre32Bits()) {
- __ shlp(ToRegister(left), Immediate(shift_count));
- } else {
- DCHECK(SmiValuesAre31Bits());
- if (instr->can_deopt()) {
- if (shift_count != 1) {
- __ shll(ToRegister(left), Immediate(shift_count - 1));
- }
- __ Integer32ToSmi(ToRegister(left), ToRegister(left));
- DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow);
- } else {
- __ shll(ToRegister(left), Immediate(shift_count));
- }
- }
- } else {
- __ shll(ToRegister(left), Immediate(shift_count));
- }
- }
- break;
- default:
- UNREACHABLE();
- break;
- }
- }
-}
-
-
-void LCodeGen::DoSubI(LSubI* instr) {
- LOperand* left = instr->left();
- LOperand* right = instr->right();
- DCHECK(left->Equals(instr->result()));
-
- if (right->IsConstantOperand()) {
- int32_t right_operand =
- ToRepresentation(LConstantOperand::cast(right),
- instr->hydrogen()->right()->representation());
- __ subl(ToRegister(left), Immediate(right_operand));
- } else if (right->IsRegister()) {
- if (instr->hydrogen_value()->representation().IsSmi()) {
- __ subp(ToRegister(left), ToRegister(right));
- } else {
- __ subl(ToRegister(left), ToRegister(right));
- }
- } else {
- if (instr->hydrogen_value()->representation().IsSmi()) {
- __ subp(ToRegister(left), ToOperand(right));
- } else {
- __ subl(ToRegister(left), ToOperand(right));
- }
- }
-
- if (instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) {
- DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow);
- }
-}
-
-
-void LCodeGen::DoConstantI(LConstantI* instr) {
- Register dst = ToRegister(instr->result());
- if (instr->value() == 0) {
- __ xorl(dst, dst);
- } else {
- __ movl(dst, Immediate(instr->value()));
- }
-}
-
-
-void LCodeGen::DoConstantS(LConstantS* instr) {
- __ Move(ToRegister(instr->result()), instr->value());
-}
-
-
-void LCodeGen::DoConstantD(LConstantD* instr) {
- __ Move(ToDoubleRegister(instr->result()), instr->bits());
-}
-
-
-void LCodeGen::DoConstantE(LConstantE* instr) {
- __ LoadAddress(ToRegister(instr->result()), instr->value());
-}
-
-
-void LCodeGen::DoConstantT(LConstantT* instr) {
- Handle<Object> object = instr->value(isolate());
- AllowDeferredHandleDereference smi_check;
- __ Move(ToRegister(instr->result()), object);
-}
-
-
-void LCodeGen::DoMapEnumLength(LMapEnumLength* instr) {
- Register result = ToRegister(instr->result());
- Register map = ToRegister(instr->value());
- __ EnumLength(result, map);
-}
-
-
-void LCodeGen::DoDateField(LDateField* instr) {
- Register object = ToRegister(instr->date());
- Register result = ToRegister(instr->result());
- Smi* index = instr->index();
- DCHECK(object.is(result));
- DCHECK(object.is(rax));
-
- if (FLAG_debug_code) {
- __ AssertNotSmi(object);
- __ CmpObjectType(object, JS_DATE_TYPE, kScratchRegister);
- __ Check(equal, kOperandIsNotADate);
- }
-
- if (index->value() == 0) {
- __ movp(result, FieldOperand(object, JSDate::kValueOffset));
- } else {
- Label runtime, done;
- if (index->value() < JSDate::kFirstUncachedField) {
- ExternalReference stamp = ExternalReference::date_cache_stamp(isolate());
- Operand stamp_operand = __ ExternalOperand(stamp);
- __ movp(kScratchRegister, stamp_operand);
- __ cmpp(kScratchRegister, FieldOperand(object,
- JSDate::kCacheStampOffset));
- __ j(not_equal, &runtime, Label::kNear);
- __ movp(result, FieldOperand(object, JSDate::kValueOffset +
- kPointerSize * index->value()));
- __ jmp(&done, Label::kNear);
- }
- __ bind(&runtime);
- __ PrepareCallCFunction(2);
- __ movp(arg_reg_1, object);
- __ Move(arg_reg_2, index, Assembler::RelocInfoNone());
- __ CallCFunction(ExternalReference::get_date_field_function(isolate()), 2);
- __ bind(&done);
- }
-}
-
-
-Operand LCodeGen::BuildSeqStringOperand(Register string,
- LOperand* index,
- String::Encoding encoding) {
- if (index->IsConstantOperand()) {
- int offset = ToInteger32(LConstantOperand::cast(index));
- if (encoding == String::TWO_BYTE_ENCODING) {
- offset *= kUC16Size;
- }
- STATIC_ASSERT(kCharSize == 1);
- return FieldOperand(string, SeqString::kHeaderSize + offset);
- }
- return FieldOperand(
- string, ToRegister(index),
- encoding == String::ONE_BYTE_ENCODING ? times_1 : times_2,
- SeqString::kHeaderSize);
-}
-
-
-void LCodeGen::DoSeqStringGetChar(LSeqStringGetChar* instr) {
- String::Encoding encoding = instr->hydrogen()->encoding();
- Register result = ToRegister(instr->result());
- Register string = ToRegister(instr->string());
-
- if (FLAG_debug_code) {
- __ Push(string);
- __ movp(string, FieldOperand(string, HeapObject::kMapOffset));
- __ movzxbp(string, FieldOperand(string, Map::kInstanceTypeOffset));
-
- __ andb(string, Immediate(kStringRepresentationMask | kStringEncodingMask));
- static const uint32_t one_byte_seq_type = kSeqStringTag | kOneByteStringTag;
- static const uint32_t two_byte_seq_type = kSeqStringTag | kTwoByteStringTag;
- __ cmpp(string, Immediate(encoding == String::ONE_BYTE_ENCODING
- ? one_byte_seq_type : two_byte_seq_type));
- __ Check(equal, kUnexpectedStringType);
- __ Pop(string);
- }
-
- Operand operand = BuildSeqStringOperand(string, instr->index(), encoding);
- if (encoding == String::ONE_BYTE_ENCODING) {
- __ movzxbl(result, operand);
- } else {
- __ movzxwl(result, operand);
- }
-}
-
-
-void LCodeGen::DoSeqStringSetChar(LSeqStringSetChar* instr) {
- String::Encoding encoding = instr->hydrogen()->encoding();
- Register string = ToRegister(instr->string());
-
- if (FLAG_debug_code) {
- Register value = ToRegister(instr->value());
- Register index = ToRegister(instr->index());
- static const uint32_t one_byte_seq_type = kSeqStringTag | kOneByteStringTag;
- static const uint32_t two_byte_seq_type = kSeqStringTag | kTwoByteStringTag;
- int encoding_mask =
- instr->hydrogen()->encoding() == String::ONE_BYTE_ENCODING
- ? one_byte_seq_type : two_byte_seq_type;
- __ EmitSeqStringSetCharCheck(string, index, value, encoding_mask);
- }
-
- Operand operand = BuildSeqStringOperand(string, instr->index(), encoding);
- if (instr->value()->IsConstantOperand()) {
- int value = ToInteger32(LConstantOperand::cast(instr->value()));
- DCHECK_LE(0, value);
- if (encoding == String::ONE_BYTE_ENCODING) {
- DCHECK_LE(value, String::kMaxOneByteCharCode);
- __ movb(operand, Immediate(value));
- } else {
- DCHECK_LE(value, String::kMaxUtf16CodeUnit);
- __ movw(operand, Immediate(value));
- }
- } else {
- Register value = ToRegister(instr->value());
- if (encoding == String::ONE_BYTE_ENCODING) {
- __ movb(operand, value);
- } else {
- __ movw(operand, value);
- }
- }
-}
-
-
-void LCodeGen::DoAddI(LAddI* instr) {
- LOperand* left = instr->left();
- LOperand* right = instr->right();
-
- Representation target_rep = instr->hydrogen()->representation();
- bool is_p = target_rep.IsSmi() || target_rep.IsExternal();
-
- if (LAddI::UseLea(instr->hydrogen()) && !left->Equals(instr->result())) {
- if (right->IsConstantOperand()) {
- // No support for smi-immediates for 32-bit SMI.
- DCHECK(SmiValuesAre32Bits() ? !target_rep.IsSmi() : SmiValuesAre31Bits());
- int32_t offset =
- ToRepresentation(LConstantOperand::cast(right),
- instr->hydrogen()->right()->representation());
- if (is_p) {
- __ leap(ToRegister(instr->result()),
- MemOperand(ToRegister(left), offset));
- } else {
- __ leal(ToRegister(instr->result()),
- MemOperand(ToRegister(left), offset));
- }
- } else {
- Operand address(ToRegister(left), ToRegister(right), times_1, 0);
- if (is_p) {
- __ leap(ToRegister(instr->result()), address);
- } else {
- __ leal(ToRegister(instr->result()), address);
- }
- }
- } else {
- if (right->IsConstantOperand()) {
- // No support for smi-immediates for 32-bit SMI.
- DCHECK(SmiValuesAre32Bits() ? !target_rep.IsSmi() : SmiValuesAre31Bits());
- int32_t right_operand =
- ToRepresentation(LConstantOperand::cast(right),
- instr->hydrogen()->right()->representation());
- if (is_p) {
- __ addp(ToRegister(left), Immediate(right_operand));
- } else {
- __ addl(ToRegister(left), Immediate(right_operand));
- }
- } else if (right->IsRegister()) {
- if (is_p) {
- __ addp(ToRegister(left), ToRegister(right));
- } else {
- __ addl(ToRegister(left), ToRegister(right));
- }
- } else {
- if (is_p) {
- __ addp(ToRegister(left), ToOperand(right));
- } else {
- __ addl(ToRegister(left), ToOperand(right));
- }
- }
- if (instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) {
- DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow);
- }
- }
-}
-
-
-void LCodeGen::DoMathMinMax(LMathMinMax* instr) {
- LOperand* left = instr->left();
- LOperand* right = instr->right();
- DCHECK(left->Equals(instr->result()));
- HMathMinMax::Operation operation = instr->hydrogen()->operation();
- if (instr->hydrogen()->representation().IsSmiOrInteger32()) {
- Label return_left;
- Condition condition = (operation == HMathMinMax::kMathMin)
- ? less_equal
- : greater_equal;
- Register left_reg = ToRegister(left);
- if (right->IsConstantOperand()) {
- Immediate right_imm = Immediate(
- ToRepresentation(LConstantOperand::cast(right),
- instr->hydrogen()->right()->representation()));
- DCHECK(SmiValuesAre32Bits()
- ? !instr->hydrogen()->representation().IsSmi()
- : SmiValuesAre31Bits());
- __ cmpl(left_reg, right_imm);
- __ j(condition, &return_left, Label::kNear);
- __ movp(left_reg, right_imm);
- } else if (right->IsRegister()) {
- Register right_reg = ToRegister(right);
- if (instr->hydrogen_value()->representation().IsSmi()) {
- __ cmpp(left_reg, right_reg);
- } else {
- __ cmpl(left_reg, right_reg);
- }
- __ j(condition, &return_left, Label::kNear);
- __ movp(left_reg, right_reg);
- } else {
- Operand right_op = ToOperand(right);
- if (instr->hydrogen_value()->representation().IsSmi()) {
- __ cmpp(left_reg, right_op);
- } else {
- __ cmpl(left_reg, right_op);
- }
- __ j(condition, &return_left, Label::kNear);
- __ movp(left_reg, right_op);
- }
- __ bind(&return_left);
- } else {
- DCHECK(instr->hydrogen()->representation().IsDouble());
- Label check_nan_left, check_zero, return_left, return_right;
- Condition condition = (operation == HMathMinMax::kMathMin) ? below : above;
- XMMRegister left_reg = ToDoubleRegister(left);
- XMMRegister right_reg = ToDoubleRegister(right);
- __ Ucomisd(left_reg, right_reg);
- __ j(parity_even, &check_nan_left, Label::kNear); // At least one NaN.
- __ j(equal, &check_zero, Label::kNear); // left == right.
- __ j(condition, &return_left, Label::kNear);
- __ jmp(&return_right, Label::kNear);
-
- __ bind(&check_zero);
- XMMRegister xmm_scratch = double_scratch0();
- __ Xorpd(xmm_scratch, xmm_scratch);
- __ Ucomisd(left_reg, xmm_scratch);
- __ j(not_equal, &return_left, Label::kNear); // left == right != 0.
- // At this point, both left and right are either 0 or -0.
- if (operation == HMathMinMax::kMathMin) {
- __ orps(left_reg, right_reg);
- } else {
- // Since we operate on +0 and/or -0, addsd and andsd have the same effect.
- __ addsd(left_reg, right_reg);
- }
- __ jmp(&return_left, Label::kNear);
-
- __ bind(&check_nan_left);
- __ Ucomisd(left_reg, left_reg); // NaN check.
- __ j(parity_even, &return_left, Label::kNear);
- __ bind(&return_right);
- __ Movapd(left_reg, right_reg);
-
- __ bind(&return_left);
- }
-}
-
-
-void LCodeGen::DoArithmeticD(LArithmeticD* instr) {
- XMMRegister left = ToDoubleRegister(instr->left());
- XMMRegister right = ToDoubleRegister(instr->right());
- XMMRegister result = ToDoubleRegister(instr->result());
- switch (instr->op()) {
- case Token::ADD:
- if (CpuFeatures::IsSupported(AVX)) {
- CpuFeatureScope scope(masm(), AVX);
- __ vaddsd(result, left, right);
- } else {
- DCHECK(result.is(left));
- __ addsd(left, right);
- }
- break;
- case Token::SUB:
- if (CpuFeatures::IsSupported(AVX)) {
- CpuFeatureScope scope(masm(), AVX);
- __ vsubsd(result, left, right);
- } else {
- DCHECK(result.is(left));
- __ subsd(left, right);
- }
- break;
- case Token::MUL:
- if (CpuFeatures::IsSupported(AVX)) {
- CpuFeatureScope scope(masm(), AVX);
- __ vmulsd(result, left, right);
- } else {
- DCHECK(result.is(left));
- __ mulsd(left, right);
- }
- break;
- case Token::DIV:
- if (CpuFeatures::IsSupported(AVX)) {
- CpuFeatureScope scope(masm(), AVX);
- __ vdivsd(result, left, right);
- } else {
- DCHECK(result.is(left));
- __ divsd(left, right);
- }
- // Don't delete this mov. It may improve performance on some CPUs,
- // when there is a (v)mulsd depending on the result
- __ Movapd(result, result);
- break;
- case Token::MOD: {
- XMMRegister xmm_scratch = double_scratch0();
- __ PrepareCallCFunction(2);
- __ Movapd(xmm_scratch, left);
- DCHECK(right.is(xmm1));
- __ CallCFunction(
- ExternalReference::mod_two_doubles_operation(isolate()), 2);
- __ Movapd(result, xmm_scratch);
- break;
- }
- default:
- UNREACHABLE();
- break;
- }
-}
-
-
-void LCodeGen::DoArithmeticT(LArithmeticT* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- DCHECK(ToRegister(instr->left()).is(rdx));
- DCHECK(ToRegister(instr->right()).is(rax));
- DCHECK(ToRegister(instr->result()).is(rax));
-
- Handle<Code> code =
- CodeFactory::BinaryOpIC(isolate(), instr->op(), instr->strength()).code();
- CallCode(code, RelocInfo::CODE_TARGET, instr);
-}
-
-
-template<class InstrType>
-void LCodeGen::EmitBranch(InstrType instr, Condition cc) {
- int left_block = instr->TrueDestination(chunk_);
- int right_block = instr->FalseDestination(chunk_);
-
- int next_block = GetNextEmittedBlock();
-
- if (right_block == left_block || cc == no_condition) {
- EmitGoto(left_block);
- } else if (left_block == next_block) {
- __ j(NegateCondition(cc), chunk_->GetAssemblyLabel(right_block));
- } else if (right_block == next_block) {
- __ j(cc, chunk_->GetAssemblyLabel(left_block));
- } else {
- __ j(cc, chunk_->GetAssemblyLabel(left_block));
- if (cc != always) {
- __ jmp(chunk_->GetAssemblyLabel(right_block));
- }
- }
-}
-
-
-template <class InstrType>
-void LCodeGen::EmitTrueBranch(InstrType instr, Condition cc) {
- int true_block = instr->TrueDestination(chunk_);
- __ j(cc, chunk_->GetAssemblyLabel(true_block));
-}
-
-
-template <class InstrType>
-void LCodeGen::EmitFalseBranch(InstrType instr, Condition cc) {
- int false_block = instr->FalseDestination(chunk_);
- __ j(cc, chunk_->GetAssemblyLabel(false_block));
-}
-
-
-void LCodeGen::DoDebugBreak(LDebugBreak* instr) {
- __ int3();
-}
-
-
-void LCodeGen::DoBranch(LBranch* instr) {
- Representation r = instr->hydrogen()->value()->representation();
- if (r.IsInteger32()) {
- DCHECK(!info()->IsStub());
- Register reg = ToRegister(instr->value());
- __ testl(reg, reg);
- EmitBranch(instr, not_zero);
- } else if (r.IsSmi()) {
- DCHECK(!info()->IsStub());
- Register reg = ToRegister(instr->value());
- __ testp(reg, reg);
- EmitBranch(instr, not_zero);
- } else if (r.IsDouble()) {
- DCHECK(!info()->IsStub());
- XMMRegister reg = ToDoubleRegister(instr->value());
- XMMRegister xmm_scratch = double_scratch0();
- __ Xorpd(xmm_scratch, xmm_scratch);
- __ Ucomisd(reg, xmm_scratch);
- EmitBranch(instr, not_equal);
- } else {
- DCHECK(r.IsTagged());
- Register reg = ToRegister(instr->value());
- HType type = instr->hydrogen()->value()->type();
- if (type.IsBoolean()) {
- DCHECK(!info()->IsStub());
- __ CompareRoot(reg, Heap::kTrueValueRootIndex);
- EmitBranch(instr, equal);
- } else if (type.IsSmi()) {
- DCHECK(!info()->IsStub());
- __ SmiCompare(reg, Smi::FromInt(0));
- EmitBranch(instr, not_equal);
- } else if (type.IsJSArray()) {
- DCHECK(!info()->IsStub());
- EmitBranch(instr, no_condition);
- } else if (type.IsHeapNumber()) {
- DCHECK(!info()->IsStub());
- XMMRegister xmm_scratch = double_scratch0();
- __ Xorpd(xmm_scratch, xmm_scratch);
- __ Ucomisd(xmm_scratch, FieldOperand(reg, HeapNumber::kValueOffset));
- EmitBranch(instr, not_equal);
- } else if (type.IsString()) {
- DCHECK(!info()->IsStub());
- __ cmpp(FieldOperand(reg, String::kLengthOffset), Immediate(0));
- EmitBranch(instr, not_equal);
- } else {
- ToBooleanStub::Types expected = instr->hydrogen()->expected_input_types();
- // Avoid deopts in the case where we've never executed this path before.
- if (expected.IsEmpty()) expected = ToBooleanStub::Types::Generic();
-
- if (expected.Contains(ToBooleanStub::UNDEFINED)) {
- // undefined -> false.
- __ CompareRoot(reg, Heap::kUndefinedValueRootIndex);
- __ j(equal, instr->FalseLabel(chunk_));
- }
- if (expected.Contains(ToBooleanStub::BOOLEAN)) {
- // true -> true.
- __ CompareRoot(reg, Heap::kTrueValueRootIndex);
- __ j(equal, instr->TrueLabel(chunk_));
- // false -> false.
- __ CompareRoot(reg, Heap::kFalseValueRootIndex);
- __ j(equal, instr->FalseLabel(chunk_));
- }
- if (expected.Contains(ToBooleanStub::NULL_TYPE)) {
- // 'null' -> false.
- __ CompareRoot(reg, Heap::kNullValueRootIndex);
- __ j(equal, instr->FalseLabel(chunk_));
- }
-
- if (expected.Contains(ToBooleanStub::SMI)) {
- // Smis: 0 -> false, all other -> true.
- __ Cmp(reg, Smi::FromInt(0));
- __ j(equal, instr->FalseLabel(chunk_));
- __ JumpIfSmi(reg, instr->TrueLabel(chunk_));
- } else if (expected.NeedsMap()) {
- // If we need a map later and have a Smi -> deopt.
- __ testb(reg, Immediate(kSmiTagMask));
- DeoptimizeIf(zero, instr, Deoptimizer::kSmi);
- }
-
- const Register map = kScratchRegister;
- if (expected.NeedsMap()) {
- __ movp(map, FieldOperand(reg, HeapObject::kMapOffset));
-
- if (expected.CanBeUndetectable()) {
- // Undetectable -> false.
- __ testb(FieldOperand(map, Map::kBitFieldOffset),
- Immediate(1 << Map::kIsUndetectable));
- __ j(not_zero, instr->FalseLabel(chunk_));
- }
- }
-
- if (expected.Contains(ToBooleanStub::SPEC_OBJECT)) {
- // spec object -> true.
- __ CmpInstanceType(map, FIRST_SPEC_OBJECT_TYPE);
- __ j(above_equal, instr->TrueLabel(chunk_));
- }
-
- if (expected.Contains(ToBooleanStub::STRING)) {
- // String value -> false iff empty.
- Label not_string;
- __ CmpInstanceType(map, FIRST_NONSTRING_TYPE);
- __ j(above_equal, &not_string, Label::kNear);
- __ cmpp(FieldOperand(reg, String::kLengthOffset), Immediate(0));
- __ j(not_zero, instr->TrueLabel(chunk_));
- __ jmp(instr->FalseLabel(chunk_));
- __ bind(&not_string);
- }
-
- if (expected.Contains(ToBooleanStub::SYMBOL)) {
- // Symbol value -> true.
- __ CmpInstanceType(map, SYMBOL_TYPE);
- __ j(equal, instr->TrueLabel(chunk_));
- }
-
- if (expected.Contains(ToBooleanStub::SIMD_VALUE)) {
- // SIMD value -> true.
- __ CmpInstanceType(map, SIMD128_VALUE_TYPE);
- __ j(equal, instr->TrueLabel(chunk_));
- }
-
- if (expected.Contains(ToBooleanStub::HEAP_NUMBER)) {
- // heap number -> false iff +0, -0, or NaN.
- Label not_heap_number;
- __ CompareRoot(map, Heap::kHeapNumberMapRootIndex);
- __ j(not_equal, &not_heap_number, Label::kNear);
- XMMRegister xmm_scratch = double_scratch0();
- __ Xorpd(xmm_scratch, xmm_scratch);
- __ Ucomisd(xmm_scratch, FieldOperand(reg, HeapNumber::kValueOffset));
- __ j(zero, instr->FalseLabel(chunk_));
- __ jmp(instr->TrueLabel(chunk_));
- __ bind(&not_heap_number);
- }
-
- if (!expected.IsGeneric()) {
- // We've seen something for the first time -> deopt.
- // This can only happen if we are not generic already.
- DeoptimizeIf(no_condition, instr, Deoptimizer::kUnexpectedObject);
- }
- }
- }
-}
-
-
-void LCodeGen::EmitGoto(int block) {
- if (!IsNextEmittedBlock(block)) {
- __ jmp(chunk_->GetAssemblyLabel(chunk_->LookupDestination(block)));
- }
-}
-
-
-void LCodeGen::DoGoto(LGoto* instr) {
- EmitGoto(instr->block_id());
-}
-
-
-inline Condition LCodeGen::TokenToCondition(Token::Value op, bool is_unsigned) {
- Condition cond = no_condition;
- switch (op) {
- case Token::EQ:
- case Token::EQ_STRICT:
- cond = equal;
- break;
- case Token::NE:
- case Token::NE_STRICT:
- cond = not_equal;
- break;
- case Token::LT:
- cond = is_unsigned ? below : less;
- break;
- case Token::GT:
- cond = is_unsigned ? above : greater;
- break;
- case Token::LTE:
- cond = is_unsigned ? below_equal : less_equal;
- break;
- case Token::GTE:
- cond = is_unsigned ? above_equal : greater_equal;
- break;
- case Token::IN:
- case Token::INSTANCEOF:
- default:
- UNREACHABLE();
- }
- return cond;
-}
-
-
-void LCodeGen::DoCompareNumericAndBranch(LCompareNumericAndBranch* instr) {
- LOperand* left = instr->left();
- LOperand* right = instr->right();
- bool is_unsigned =
- instr->is_double() ||
- instr->hydrogen()->left()->CheckFlag(HInstruction::kUint32) ||
- instr->hydrogen()->right()->CheckFlag(HInstruction::kUint32);
- Condition cc = TokenToCondition(instr->op(), is_unsigned);
-
- if (left->IsConstantOperand() && right->IsConstantOperand()) {
- // We can statically evaluate the comparison.
- double left_val = ToDouble(LConstantOperand::cast(left));
- double right_val = ToDouble(LConstantOperand::cast(right));
- int next_block = EvalComparison(instr->op(), left_val, right_val) ?
- instr->TrueDestination(chunk_) : instr->FalseDestination(chunk_);
- EmitGoto(next_block);
- } else {
- if (instr->is_double()) {
- // Don't base result on EFLAGS when a NaN is involved. Instead
- // jump to the false block.
- __ Ucomisd(ToDoubleRegister(left), ToDoubleRegister(right));
- __ j(parity_even, instr->FalseLabel(chunk_));
- } else {
- int32_t value;
- if (right->IsConstantOperand()) {
- value = ToInteger32(LConstantOperand::cast(right));
- if (instr->hydrogen_value()->representation().IsSmi()) {
- __ Cmp(ToRegister(left), Smi::FromInt(value));
- } else {
- __ cmpl(ToRegister(left), Immediate(value));
- }
- } else if (left->IsConstantOperand()) {
- value = ToInteger32(LConstantOperand::cast(left));
- if (instr->hydrogen_value()->representation().IsSmi()) {
- if (right->IsRegister()) {
- __ Cmp(ToRegister(right), Smi::FromInt(value));
- } else {
- __ Cmp(ToOperand(right), Smi::FromInt(value));
- }
- } else if (right->IsRegister()) {
- __ cmpl(ToRegister(right), Immediate(value));
- } else {
- __ cmpl(ToOperand(right), Immediate(value));
- }
- // We commuted the operands, so commute the condition.
- cc = CommuteCondition(cc);
- } else if (instr->hydrogen_value()->representation().IsSmi()) {
- if (right->IsRegister()) {
- __ cmpp(ToRegister(left), ToRegister(right));
- } else {
- __ cmpp(ToRegister(left), ToOperand(right));
- }
- } else {
- if (right->IsRegister()) {
- __ cmpl(ToRegister(left), ToRegister(right));
- } else {
- __ cmpl(ToRegister(left), ToOperand(right));
- }
- }
- }
- EmitBranch(instr, cc);
- }
-}
-
-
-void LCodeGen::DoCmpObjectEqAndBranch(LCmpObjectEqAndBranch* instr) {
- Register left = ToRegister(instr->left());
-
- if (instr->right()->IsConstantOperand()) {
- Handle<Object> right = ToHandle(LConstantOperand::cast(instr->right()));
- __ Cmp(left, right);
- } else {
- Register right = ToRegister(instr->right());
- __ cmpp(left, right);
- }
- EmitBranch(instr, equal);
-}
-
-
-void LCodeGen::DoCmpHoleAndBranch(LCmpHoleAndBranch* instr) {
- if (instr->hydrogen()->representation().IsTagged()) {
- Register input_reg = ToRegister(instr->object());
- __ Cmp(input_reg, factory()->the_hole_value());
- EmitBranch(instr, equal);
- return;
- }
-
- XMMRegister input_reg = ToDoubleRegister(instr->object());
- __ Ucomisd(input_reg, input_reg);
- EmitFalseBranch(instr, parity_odd);
-
- __ subp(rsp, Immediate(kDoubleSize));
- __ Movsd(MemOperand(rsp, 0), input_reg);
- __ addp(rsp, Immediate(kDoubleSize));
-
- int offset = sizeof(kHoleNanUpper32);
- __ cmpl(MemOperand(rsp, -offset), Immediate(kHoleNanUpper32));
- EmitBranch(instr, equal);
-}
-
-
-void LCodeGen::DoCompareMinusZeroAndBranch(LCompareMinusZeroAndBranch* instr) {
- Representation rep = instr->hydrogen()->value()->representation();
- DCHECK(!rep.IsInteger32());
-
- if (rep.IsDouble()) {
- XMMRegister value = ToDoubleRegister(instr->value());
- XMMRegister xmm_scratch = double_scratch0();
- __ Xorpd(xmm_scratch, xmm_scratch);
- __ Ucomisd(xmm_scratch, value);
- EmitFalseBranch(instr, not_equal);
- __ Movmskpd(kScratchRegister, value);
- __ testl(kScratchRegister, Immediate(1));
- EmitBranch(instr, not_zero);
- } else {
- Register value = ToRegister(instr->value());
- Handle<Map> map = masm()->isolate()->factory()->heap_number_map();
- __ CheckMap(value, map, instr->FalseLabel(chunk()), DO_SMI_CHECK);
- __ cmpl(FieldOperand(value, HeapNumber::kExponentOffset),
- Immediate(0x1));
- EmitFalseBranch(instr, no_overflow);
- __ cmpl(FieldOperand(value, HeapNumber::kMantissaOffset),
- Immediate(0x00000000));
- EmitBranch(instr, equal);
- }
-}
-
-
-Condition LCodeGen::EmitIsString(Register input,
- Register temp1,
- Label* is_not_string,
- SmiCheck check_needed = INLINE_SMI_CHECK) {
- if (check_needed == INLINE_SMI_CHECK) {
- __ JumpIfSmi(input, is_not_string);
- }
-
- Condition cond = masm_->IsObjectStringType(input, temp1, temp1);
-
- return cond;
-}
-
-
-void LCodeGen::DoIsStringAndBranch(LIsStringAndBranch* instr) {
- Register reg = ToRegister(instr->value());
- Register temp = ToRegister(instr->temp());
-
- SmiCheck check_needed =
- instr->hydrogen()->value()->type().IsHeapObject()
- ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
-
- Condition true_cond = EmitIsString(
- reg, temp, instr->FalseLabel(chunk_), check_needed);
-
- EmitBranch(instr, true_cond);
-}
-
-
-void LCodeGen::DoIsSmiAndBranch(LIsSmiAndBranch* instr) {
- Condition is_smi;
- if (instr->value()->IsRegister()) {
- Register input = ToRegister(instr->value());
- is_smi = masm()->CheckSmi(input);
- } else {
- Operand input = ToOperand(instr->value());
- is_smi = masm()->CheckSmi(input);
- }
- EmitBranch(instr, is_smi);
-}
-
-
-void LCodeGen::DoIsUndetectableAndBranch(LIsUndetectableAndBranch* instr) {
- Register input = ToRegister(instr->value());
- Register temp = ToRegister(instr->temp());
-
- if (!instr->hydrogen()->value()->type().IsHeapObject()) {
- __ JumpIfSmi(input, instr->FalseLabel(chunk_));
- }
- __ movp(temp, FieldOperand(input, HeapObject::kMapOffset));
- __ testb(FieldOperand(temp, Map::kBitFieldOffset),
- Immediate(1 << Map::kIsUndetectable));
- EmitBranch(instr, not_zero);
-}
-
-
-void LCodeGen::DoStringCompareAndBranch(LStringCompareAndBranch* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- DCHECK(ToRegister(instr->left()).is(rdx));
- DCHECK(ToRegister(instr->right()).is(rax));
-
- Handle<Code> code = CodeFactory::StringCompare(isolate()).code();
- CallCode(code, RelocInfo::CODE_TARGET, instr);
- __ testp(rax, rax);
-
- EmitBranch(instr, TokenToCondition(instr->op(), false));
-}
-
-
-static InstanceType TestType(HHasInstanceTypeAndBranch* instr) {
- InstanceType from = instr->from();
- InstanceType to = instr->to();
- if (from == FIRST_TYPE) return to;
- DCHECK(from == to || to == LAST_TYPE);
- return from;
-}
-
-
-static Condition BranchCondition(HHasInstanceTypeAndBranch* instr) {
- InstanceType from = instr->from();
- InstanceType to = instr->to();
- if (from == to) return equal;
- if (to == LAST_TYPE) return above_equal;
- if (from == FIRST_TYPE) return below_equal;
- UNREACHABLE();
- return equal;
-}
-
-
-void LCodeGen::DoHasInstanceTypeAndBranch(LHasInstanceTypeAndBranch* instr) {
- Register input = ToRegister(instr->value());
-
- if (!instr->hydrogen()->value()->type().IsHeapObject()) {
- __ JumpIfSmi(input, instr->FalseLabel(chunk_));
- }
-
- __ CmpObjectType(input, TestType(instr->hydrogen()), kScratchRegister);
- EmitBranch(instr, BranchCondition(instr->hydrogen()));
-}
-
-
-void LCodeGen::DoGetCachedArrayIndex(LGetCachedArrayIndex* instr) {
- Register input = ToRegister(instr->value());
- Register result = ToRegister(instr->result());
-
- __ AssertString(input);
-
- __ movl(result, FieldOperand(input, String::kHashFieldOffset));
- DCHECK(String::kHashShift >= kSmiTagSize);
- __ IndexFromHash(result, result);
-}
-
-
-void LCodeGen::DoHasCachedArrayIndexAndBranch(
- LHasCachedArrayIndexAndBranch* instr) {
- Register input = ToRegister(instr->value());
-
- __ testl(FieldOperand(input, String::kHashFieldOffset),
- Immediate(String::kContainsCachedArrayIndexMask));
- EmitBranch(instr, equal);
-}
-
-
-// Branches to a label or falls through with the answer in the z flag.
-// Trashes the temp register.
-void LCodeGen::EmitClassOfTest(Label* is_true,
- Label* is_false,
- Handle<String> class_name,
- Register input,
- Register temp,
- Register temp2) {
- DCHECK(!input.is(temp));
- DCHECK(!input.is(temp2));
- DCHECK(!temp.is(temp2));
-
- __ JumpIfSmi(input, is_false);
-
- if (String::Equals(isolate()->factory()->Function_string(), class_name)) {
- // Assuming the following assertions, we can use the same compares to test
- // for both being a function type and being in the object type range.
- STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2);
- STATIC_ASSERT(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE ==
- FIRST_SPEC_OBJECT_TYPE + 1);
- STATIC_ASSERT(LAST_NONCALLABLE_SPEC_OBJECT_TYPE ==
- LAST_SPEC_OBJECT_TYPE - 1);
- STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE);
- __ CmpObjectType(input, FIRST_SPEC_OBJECT_TYPE, temp);
- __ j(below, is_false);
- __ j(equal, is_true);
- __ CmpInstanceType(temp, LAST_SPEC_OBJECT_TYPE);
- __ j(equal, is_true);
- } else {
- // Faster code path to avoid two compares: subtract lower bound from the
- // actual type and do a signed compare with the width of the type range.
- __ movp(temp, FieldOperand(input, HeapObject::kMapOffset));
- __ movzxbl(temp2, FieldOperand(temp, Map::kInstanceTypeOffset));
- __ subp(temp2, Immediate(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE));
- __ cmpp(temp2, Immediate(LAST_NONCALLABLE_SPEC_OBJECT_TYPE -
- FIRST_NONCALLABLE_SPEC_OBJECT_TYPE));
- __ j(above, is_false);
- }
-
- // Now we are in the FIRST-LAST_NONCALLABLE_SPEC_OBJECT_TYPE range.
- // Check if the constructor in the map is a function.
- __ GetMapConstructor(temp, temp, kScratchRegister);
-
- // Objects with a non-function constructor have class 'Object'.
- __ CmpInstanceType(kScratchRegister, JS_FUNCTION_TYPE);
- if (String::Equals(class_name, isolate()->factory()->Object_string())) {
- __ j(not_equal, is_true);
- } else {
- __ j(not_equal, is_false);
- }
-
- // temp now contains the constructor function. Grab the
- // instance class name from there.
- __ movp(temp, FieldOperand(temp, JSFunction::kSharedFunctionInfoOffset));
- __ movp(temp, FieldOperand(temp,
- SharedFunctionInfo::kInstanceClassNameOffset));
- // The class name we are testing against is internalized since it's a literal.
- // The name in the constructor is internalized because of the way the context
- // is booted. This routine isn't expected to work for random API-created
- // classes and it doesn't have to because you can't access it with natives
- // syntax. Since both sides are internalized it is sufficient to use an
- // identity comparison.
- DCHECK(class_name->IsInternalizedString());
- __ Cmp(temp, class_name);
- // End with the answer in the z flag.
-}
-
-
-void LCodeGen::DoClassOfTestAndBranch(LClassOfTestAndBranch* instr) {
- Register input = ToRegister(instr->value());
- Register temp = ToRegister(instr->temp());
- Register temp2 = ToRegister(instr->temp2());
- Handle<String> class_name = instr->hydrogen()->class_name();
-
- EmitClassOfTest(instr->TrueLabel(chunk_), instr->FalseLabel(chunk_),
- class_name, input, temp, temp2);
-
- EmitBranch(instr, equal);
-}
-
-
-void LCodeGen::DoCmpMapAndBranch(LCmpMapAndBranch* instr) {
- Register reg = ToRegister(instr->value());
-
- __ Cmp(FieldOperand(reg, HeapObject::kMapOffset), instr->map());
- EmitBranch(instr, equal);
-}
-
-
-void LCodeGen::DoInstanceOf(LInstanceOf* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- DCHECK(ToRegister(instr->left()).is(InstanceOfDescriptor::LeftRegister()));
- DCHECK(ToRegister(instr->right()).is(InstanceOfDescriptor::RightRegister()));
- DCHECK(ToRegister(instr->result()).is(rax));
- InstanceOfStub stub(isolate());
- CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
-}
-
-
-void LCodeGen::DoHasInPrototypeChainAndBranch(
- LHasInPrototypeChainAndBranch* instr) {
- Register const object = ToRegister(instr->object());
- Register const object_map = kScratchRegister;
- Register const object_prototype = object_map;
- Register const prototype = ToRegister(instr->prototype());
-
- // The {object} must be a spec object. It's sufficient to know that {object}
- // is not a smi, since all other non-spec objects have {null} prototypes and
- // will be ruled out below.
- if (instr->hydrogen()->ObjectNeedsSmiCheck()) {
- Condition is_smi = __ CheckSmi(object);
- EmitFalseBranch(instr, is_smi);
- }
-
- // Loop through the {object}s prototype chain looking for the {prototype}.
- __ movp(object_map, FieldOperand(object, HeapObject::kMapOffset));
- Label loop;
- __ bind(&loop);
- __ movp(object_prototype, FieldOperand(object_map, Map::kPrototypeOffset));
- __ cmpp(object_prototype, prototype);
- EmitTrueBranch(instr, equal);
- __ CompareRoot(object_prototype, Heap::kNullValueRootIndex);
- EmitFalseBranch(instr, equal);
- __ movp(object_map, FieldOperand(object_prototype, HeapObject::kMapOffset));
- __ jmp(&loop);
-}
-
-
-void LCodeGen::DoCmpT(LCmpT* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- Token::Value op = instr->op();
-
- Handle<Code> ic =
- CodeFactory::CompareIC(isolate(), op, instr->strength()).code();
- CallCode(ic, RelocInfo::CODE_TARGET, instr);
-
- Condition condition = TokenToCondition(op, false);
- Label true_value, done;
- __ testp(rax, rax);
- __ j(condition, &true_value, Label::kNear);
- __ LoadRoot(ToRegister(instr->result()), Heap::kFalseValueRootIndex);
- __ jmp(&done, Label::kNear);
- __ bind(&true_value);
- __ LoadRoot(ToRegister(instr->result()), Heap::kTrueValueRootIndex);
- __ bind(&done);
-}
-
-
-void LCodeGen::DoReturn(LReturn* instr) {
- if (FLAG_trace && info()->IsOptimizing()) {
- // Preserve the return value on the stack and rely on the runtime call
- // to return the value in the same register. We're leaving the code
- // managed by the register allocator and tearing down the frame, it's
- // safe to write to the context register.
- __ Push(rax);
- __ movp(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
- __ CallRuntime(Runtime::kTraceExit, 1);
- }
- if (info()->saves_caller_doubles()) {
- RestoreCallerDoubles();
- }
- if (NeedsEagerFrame()) {
- __ movp(rsp, rbp);
- __ popq(rbp);
- }
- if (instr->has_constant_parameter_count()) {
- __ Ret((ToInteger32(instr->constant_parameter_count()) + 1) * kPointerSize,
- rcx);
- } else {
- DCHECK(info()->IsStub()); // Functions would need to drop one more value.
- Register reg = ToRegister(instr->parameter_count());
- // The argument count parameter is a smi
- __ SmiToInteger32(reg, reg);
- Register return_addr_reg = reg.is(rcx) ? rbx : rcx;
- __ PopReturnAddressTo(return_addr_reg);
- __ shlp(reg, Immediate(kPointerSizeLog2));
- __ addp(rsp, reg);
- __ jmp(return_addr_reg);
- }
-}
-
-
-template <class T>
-void LCodeGen::EmitVectorLoadICRegisters(T* instr) {
- Register vector_register = ToRegister(instr->temp_vector());
- Register slot_register = LoadWithVectorDescriptor::SlotRegister();
- DCHECK(vector_register.is(LoadWithVectorDescriptor::VectorRegister()));
- DCHECK(slot_register.is(rax));
-
- AllowDeferredHandleDereference vector_structure_check;
- Handle<TypeFeedbackVector> vector = instr->hydrogen()->feedback_vector();
- __ Move(vector_register, vector);
- // No need to allocate this register.
- FeedbackVectorSlot slot = instr->hydrogen()->slot();
- int index = vector->GetIndex(slot);
- __ Move(slot_register, Smi::FromInt(index));
-}
-
-
-template <class T>
-void LCodeGen::EmitVectorStoreICRegisters(T* instr) {
- Register vector_register = ToRegister(instr->temp_vector());
- Register slot_register = ToRegister(instr->temp_slot());
-
- AllowDeferredHandleDereference vector_structure_check;
- Handle<TypeFeedbackVector> vector = instr->hydrogen()->feedback_vector();
- __ Move(vector_register, vector);
- FeedbackVectorSlot slot = instr->hydrogen()->slot();
- int index = vector->GetIndex(slot);
- __ Move(slot_register, Smi::FromInt(index));
-}
-
-
-void LCodeGen::DoLoadGlobalGeneric(LLoadGlobalGeneric* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- DCHECK(ToRegister(instr->global_object())
- .is(LoadDescriptor::ReceiverRegister()));
- DCHECK(ToRegister(instr->result()).is(rax));
-
- __ Move(LoadDescriptor::NameRegister(), instr->name());
- EmitVectorLoadICRegisters<LLoadGlobalGeneric>(instr);
- Handle<Code> ic =
- CodeFactory::LoadICInOptimizedCode(isolate(), instr->typeof_mode(),
- SLOPPY, PREMONOMORPHIC).code();
- CallCode(ic, RelocInfo::CODE_TARGET, instr);
-}
-
-
-void LCodeGen::DoLoadGlobalViaContext(LLoadGlobalViaContext* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- DCHECK(ToRegister(instr->result()).is(rax));
- int const slot = instr->slot_index();
- int const depth = instr->depth();
- if (depth <= LoadGlobalViaContextStub::kMaximumDepth) {
- __ Set(LoadGlobalViaContextDescriptor::SlotRegister(), slot);
- Handle<Code> stub =
- CodeFactory::LoadGlobalViaContext(isolate(), depth).code();
- CallCode(stub, RelocInfo::CODE_TARGET, instr);
- } else {
- __ Push(Smi::FromInt(slot));
- __ CallRuntime(Runtime::kLoadGlobalViaContext, 1);
- }
-}
-
-
-void LCodeGen::DoLoadContextSlot(LLoadContextSlot* instr) {
- Register context = ToRegister(instr->context());
- Register result = ToRegister(instr->result());
- __ movp(result, ContextOperand(context, instr->slot_index()));
- if (instr->hydrogen()->RequiresHoleCheck()) {
- __ CompareRoot(result, Heap::kTheHoleValueRootIndex);
- if (instr->hydrogen()->DeoptimizesOnHole()) {
- DeoptimizeIf(equal, instr, Deoptimizer::kHole);
- } else {
- Label is_not_hole;
- __ j(not_equal, &is_not_hole, Label::kNear);
- __ LoadRoot(result, Heap::kUndefinedValueRootIndex);
- __ bind(&is_not_hole);
- }
- }
-}
-
-
-void LCodeGen::DoStoreContextSlot(LStoreContextSlot* instr) {
- Register context = ToRegister(instr->context());
- Register value = ToRegister(instr->value());
-
- Operand target = ContextOperand(context, instr->slot_index());
-
- Label skip_assignment;
- if (instr->hydrogen()->RequiresHoleCheck()) {
- __ CompareRoot(target, Heap::kTheHoleValueRootIndex);
- if (instr->hydrogen()->DeoptimizesOnHole()) {
- DeoptimizeIf(equal, instr, Deoptimizer::kHole);
- } else {
- __ j(not_equal, &skip_assignment);
- }
- }
- __ movp(target, value);
-
- if (instr->hydrogen()->NeedsWriteBarrier()) {
- SmiCheck check_needed =
- instr->hydrogen()->value()->type().IsHeapObject()
- ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
- int offset = Context::SlotOffset(instr->slot_index());
- Register scratch = ToRegister(instr->temp());
- __ RecordWriteContextSlot(context,
- offset,
- value,
- scratch,
- kSaveFPRegs,
- EMIT_REMEMBERED_SET,
- check_needed);
- }
-
- __ bind(&skip_assignment);
-}
-
-
-void LCodeGen::DoLoadNamedField(LLoadNamedField* instr) {
- HObjectAccess access = instr->hydrogen()->access();
- int offset = access.offset();
-
- if (access.IsExternalMemory()) {
- Register result = ToRegister(instr->result());
- if (instr->object()->IsConstantOperand()) {
- DCHECK(result.is(rax));
- __ load_rax(ToExternalReference(LConstantOperand::cast(instr->object())));
- } else {
- Register object = ToRegister(instr->object());
- __ Load(result, MemOperand(object, offset), access.representation());
- }
- return;
- }
-
- Register object = ToRegister(instr->object());
- if (instr->hydrogen()->representation().IsDouble()) {
- DCHECK(access.IsInobject());
- XMMRegister result = ToDoubleRegister(instr->result());
- __ Movsd(result, FieldOperand(object, offset));
- return;
- }
-
- Register result = ToRegister(instr->result());
- if (!access.IsInobject()) {
- __ movp(result, FieldOperand(object, JSObject::kPropertiesOffset));
- object = result;
- }
-
- Representation representation = access.representation();
- if (representation.IsSmi() && SmiValuesAre32Bits() &&
- instr->hydrogen()->representation().IsInteger32()) {
- if (FLAG_debug_code) {
- Register scratch = kScratchRegister;
- __ Load(scratch, FieldOperand(object, offset), representation);
- __ AssertSmi(scratch);
- }
-
- // Read int value directly from upper half of the smi.
- STATIC_ASSERT(kSmiTag == 0);
- DCHECK(kSmiTagSize + kSmiShiftSize == 32);
- offset += kPointerSize / 2;
- representation = Representation::Integer32();
- }
- __ Load(result, FieldOperand(object, offset), representation);
-}
-
-
-void LCodeGen::DoLoadNamedGeneric(LLoadNamedGeneric* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- DCHECK(ToRegister(instr->object()).is(LoadDescriptor::ReceiverRegister()));
- DCHECK(ToRegister(instr->result()).is(rax));
-
- __ Move(LoadDescriptor::NameRegister(), instr->name());
- EmitVectorLoadICRegisters<LLoadNamedGeneric>(instr);
- Handle<Code> ic =
- CodeFactory::LoadICInOptimizedCode(
- isolate(), NOT_INSIDE_TYPEOF, instr->hydrogen()->language_mode(),
- instr->hydrogen()->initialization_state()).code();
- CallCode(ic, RelocInfo::CODE_TARGET, instr);
-}
-
-
-void LCodeGen::DoLoadFunctionPrototype(LLoadFunctionPrototype* instr) {
- Register function = ToRegister(instr->function());
- Register result = ToRegister(instr->result());
-
- // Get the prototype or initial map from the function.
- __ movp(result,
- FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset));
-
- // Check that the function has a prototype or an initial map.
- __ CompareRoot(result, Heap::kTheHoleValueRootIndex);
- DeoptimizeIf(equal, instr, Deoptimizer::kHole);
-
- // If the function does not have an initial map, we're done.
- Label done;
- __ CmpObjectType(result, MAP_TYPE, kScratchRegister);
- __ j(not_equal, &done, Label::kNear);
-
- // Get the prototype from the initial map.
- __ movp(result, FieldOperand(result, Map::kPrototypeOffset));
-
- // All done.
- __ bind(&done);
-}
-
-
-void LCodeGen::DoLoadRoot(LLoadRoot* instr) {
- Register result = ToRegister(instr->result());
- __ LoadRoot(result, instr->index());
-}
-
-
-void LCodeGen::DoAccessArgumentsAt(LAccessArgumentsAt* instr) {
- Register arguments = ToRegister(instr->arguments());
- Register result = ToRegister(instr->result());
-
- if (instr->length()->IsConstantOperand() &&
- instr->index()->IsConstantOperand()) {
- int32_t const_index = ToInteger32(LConstantOperand::cast(instr->index()));
- int32_t const_length = ToInteger32(LConstantOperand::cast(instr->length()));
- if (const_index >= 0 && const_index < const_length) {
- StackArgumentsAccessor args(arguments, const_length,
- ARGUMENTS_DONT_CONTAIN_RECEIVER);
- __ movp(result, args.GetArgumentOperand(const_index));
- } else if (FLAG_debug_code) {
- __ int3();
- }
- } else {
- Register length = ToRegister(instr->length());
- // There are two words between the frame pointer and the last argument.
- // Subtracting from length accounts for one of them add one more.
- if (instr->index()->IsRegister()) {
- __ subl(length, ToRegister(instr->index()));
- } else {
- __ subl(length, ToOperand(instr->index()));
- }
- StackArgumentsAccessor args(arguments, length,
- ARGUMENTS_DONT_CONTAIN_RECEIVER);
- __ movp(result, args.GetArgumentOperand(0));
- }
-}
-
-
-void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
- ElementsKind elements_kind = instr->elements_kind();
- LOperand* key = instr->key();
- if (kPointerSize == kInt32Size && !key->IsConstantOperand()) {
- Register key_reg = ToRegister(key);
- Representation key_representation =
- instr->hydrogen()->key()->representation();
- if (ExternalArrayOpRequiresTemp(key_representation, elements_kind)) {
- __ SmiToInteger64(key_reg, key_reg);
- } else if (instr->hydrogen()->IsDehoisted()) {
- // Sign extend key because it could be a 32 bit negative value
- // and the dehoisted address computation happens in 64 bits
- __ movsxlq(key_reg, key_reg);
- }
- }
- Operand operand(BuildFastArrayOperand(
- instr->elements(),
- key,
- instr->hydrogen()->key()->representation(),
- elements_kind,
- instr->base_offset()));
-
- if (elements_kind == FLOAT32_ELEMENTS) {
- XMMRegister result(ToDoubleRegister(instr->result()));
- __ Cvtss2sd(result, operand);
- } else if (elements_kind == FLOAT64_ELEMENTS) {
- __ Movsd(ToDoubleRegister(instr->result()), operand);
- } else {
- Register result(ToRegister(instr->result()));
- switch (elements_kind) {
- case INT8_ELEMENTS:
- __ movsxbl(result, operand);
- break;
- case UINT8_ELEMENTS:
- case UINT8_CLAMPED_ELEMENTS:
- __ movzxbl(result, operand);
- break;
- case INT16_ELEMENTS:
- __ movsxwl(result, operand);
- break;
- case UINT16_ELEMENTS:
- __ movzxwl(result, operand);
- break;
- case INT32_ELEMENTS:
- __ movl(result, operand);
- break;
- case UINT32_ELEMENTS:
- __ movl(result, operand);
- if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) {
- __ testl(result, result);
- DeoptimizeIf(negative, instr, Deoptimizer::kNegativeValue);
- }
- break;
- case FLOAT32_ELEMENTS:
- case FLOAT64_ELEMENTS:
- case FAST_ELEMENTS:
- case FAST_SMI_ELEMENTS:
- case FAST_DOUBLE_ELEMENTS:
- case FAST_HOLEY_ELEMENTS:
- case FAST_HOLEY_SMI_ELEMENTS:
- case FAST_HOLEY_DOUBLE_ELEMENTS:
- case DICTIONARY_ELEMENTS:
- case FAST_SLOPPY_ARGUMENTS_ELEMENTS:
- case SLOW_SLOPPY_ARGUMENTS_ELEMENTS:
- UNREACHABLE();
- break;
- }
- }
-}
-
-
-void LCodeGen::DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr) {
- XMMRegister result(ToDoubleRegister(instr->result()));
- LOperand* key = instr->key();
- if (kPointerSize == kInt32Size && !key->IsConstantOperand() &&
- instr->hydrogen()->IsDehoisted()) {
- // Sign extend key because it could be a 32 bit negative value
- // and the dehoisted address computation happens in 64 bits
- __ movsxlq(ToRegister(key), ToRegister(key));
- }
- if (instr->hydrogen()->RequiresHoleCheck()) {
- Operand hole_check_operand = BuildFastArrayOperand(
- instr->elements(),
- key,
- instr->hydrogen()->key()->representation(),
- FAST_DOUBLE_ELEMENTS,
- instr->base_offset() + sizeof(kHoleNanLower32));
- __ cmpl(hole_check_operand, Immediate(kHoleNanUpper32));
- DeoptimizeIf(equal, instr, Deoptimizer::kHole);
- }
-
- Operand double_load_operand = BuildFastArrayOperand(
- instr->elements(),
- key,
- instr->hydrogen()->key()->representation(),
- FAST_DOUBLE_ELEMENTS,
- instr->base_offset());
- __ Movsd(result, double_load_operand);
-}
-
-
-void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
- HLoadKeyed* hinstr = instr->hydrogen();
- Register result = ToRegister(instr->result());
- LOperand* key = instr->key();
- bool requires_hole_check = hinstr->RequiresHoleCheck();
- Representation representation = hinstr->representation();
- int offset = instr->base_offset();
-
- if (kPointerSize == kInt32Size && !key->IsConstantOperand() &&
- instr->hydrogen()->IsDehoisted()) {
- // Sign extend key because it could be a 32 bit negative value
- // and the dehoisted address computation happens in 64 bits
- __ movsxlq(ToRegister(key), ToRegister(key));
- }
- if (representation.IsInteger32() && SmiValuesAre32Bits() &&
- hinstr->elements_kind() == FAST_SMI_ELEMENTS) {
- DCHECK(!requires_hole_check);
- if (FLAG_debug_code) {
- Register scratch = kScratchRegister;
- __ Load(scratch,
- BuildFastArrayOperand(instr->elements(),
- key,
- instr->hydrogen()->key()->representation(),
- FAST_ELEMENTS,
- offset),
- Representation::Smi());
- __ AssertSmi(scratch);
- }
- // Read int value directly from upper half of the smi.
- STATIC_ASSERT(kSmiTag == 0);
- DCHECK(kSmiTagSize + kSmiShiftSize == 32);
- offset += kPointerSize / 2;
- }
-
- __ Load(result,
- BuildFastArrayOperand(instr->elements(), key,
- instr->hydrogen()->key()->representation(),
- FAST_ELEMENTS, offset),
- representation);
-
- // Check for the hole value.
- if (requires_hole_check) {
- if (IsFastSmiElementsKind(hinstr->elements_kind())) {
- Condition smi = __ CheckSmi(result);
- DeoptimizeIf(NegateCondition(smi), instr, Deoptimizer::kNotASmi);
- } else {
- __ CompareRoot(result, Heap::kTheHoleValueRootIndex);
- DeoptimizeIf(equal, instr, Deoptimizer::kHole);
- }
- } else if (hinstr->hole_mode() == CONVERT_HOLE_TO_UNDEFINED) {
- DCHECK(hinstr->elements_kind() == FAST_HOLEY_ELEMENTS);
- Label done;
- __ CompareRoot(result, Heap::kTheHoleValueRootIndex);
- __ j(not_equal, &done);
- if (info()->IsStub()) {
- // A stub can safely convert the hole to undefined only if the array
- // protector cell contains (Smi) Isolate::kArrayProtectorValid. Otherwise
- // it needs to bail out.
- __ LoadRoot(result, Heap::kArrayProtectorRootIndex);
- __ Cmp(FieldOperand(result, Cell::kValueOffset),
- Smi::FromInt(Isolate::kArrayProtectorValid));
- DeoptimizeIf(not_equal, instr, Deoptimizer::kHole);
- }
- __ Move(result, isolate()->factory()->undefined_value());
- __ bind(&done);
- }
-}
-
-
-void LCodeGen::DoLoadKeyed(LLoadKeyed* instr) {
- if (instr->is_fixed_typed_array()) {
- DoLoadKeyedExternalArray(instr);
- } else if (instr->hydrogen()->representation().IsDouble()) {
- DoLoadKeyedFixedDoubleArray(instr);
- } else {
- DoLoadKeyedFixedArray(instr);
- }
-}
-
-
-Operand LCodeGen::BuildFastArrayOperand(
- LOperand* elements_pointer,
- LOperand* key,
- Representation key_representation,
- ElementsKind elements_kind,
- uint32_t offset) {
- Register elements_pointer_reg = ToRegister(elements_pointer);
- int shift_size = ElementsKindToShiftSize(elements_kind);
- if (key->IsConstantOperand()) {
- int32_t constant_value = ToInteger32(LConstantOperand::cast(key));
- if (constant_value & 0xF0000000) {
- Abort(kArrayIndexConstantValueTooBig);
- }
- return Operand(elements_pointer_reg,
- (constant_value << shift_size) + offset);
- } else {
- // Guaranteed by ArrayInstructionInterface::KeyedAccessIndexRequirement().
- DCHECK(key_representation.IsInteger32());
-
- ScaleFactor scale_factor = static_cast<ScaleFactor>(shift_size);
- return Operand(elements_pointer_reg,
- ToRegister(key),
- scale_factor,
- offset);
- }
-}
-
-
-void LCodeGen::DoLoadKeyedGeneric(LLoadKeyedGeneric* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- DCHECK(ToRegister(instr->object()).is(LoadDescriptor::ReceiverRegister()));
- DCHECK(ToRegister(instr->key()).is(LoadDescriptor::NameRegister()));
-
- if (instr->hydrogen()->HasVectorAndSlot()) {
- EmitVectorLoadICRegisters<LLoadKeyedGeneric>(instr);
- }
-
- Handle<Code> ic = CodeFactory::KeyedLoadICInOptimizedCode(
- isolate(), instr->hydrogen()->language_mode(),
- instr->hydrogen()->initialization_state()).code();
- CallCode(ic, RelocInfo::CODE_TARGET, instr);
-}
-
-
-void LCodeGen::DoArgumentsElements(LArgumentsElements* instr) {
- Register result = ToRegister(instr->result());
-
- if (instr->hydrogen()->from_inlined()) {
- __ leap(result, Operand(rsp, -kFPOnStackSize + -kPCOnStackSize));
- } else {
- // Check for arguments adapter frame.
- Label done, adapted;
- __ movp(result, Operand(rbp, StandardFrameConstants::kCallerFPOffset));
- __ Cmp(Operand(result, StandardFrameConstants::kContextOffset),
- Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR));
- __ j(equal, &adapted, Label::kNear);
-
- // No arguments adaptor frame.
- __ movp(result, rbp);
- __ jmp(&done, Label::kNear);
-
- // Arguments adaptor frame present.
- __ bind(&adapted);
- __ movp(result, Operand(rbp, StandardFrameConstants::kCallerFPOffset));
-
- // Result is the frame pointer for the frame if not adapted and for the real
- // frame below the adaptor frame if adapted.
- __ bind(&done);
- }
-}
-
-
-void LCodeGen::DoArgumentsLength(LArgumentsLength* instr) {
- Register result = ToRegister(instr->result());
-
- Label done;
-
- // If no arguments adaptor frame the number of arguments is fixed.
- if (instr->elements()->IsRegister()) {
- __ cmpp(rbp, ToRegister(instr->elements()));
- } else {
- __ cmpp(rbp, ToOperand(instr->elements()));
- }
- __ movl(result, Immediate(scope()->num_parameters()));
- __ j(equal, &done, Label::kNear);
-
- // Arguments adaptor frame present. Get argument length from there.
- __ movp(result, Operand(rbp, StandardFrameConstants::kCallerFPOffset));
- __ SmiToInteger32(result,
- Operand(result,
- ArgumentsAdaptorFrameConstants::kLengthOffset));
-
- // Argument length is in result register.
- __ bind(&done);
-}
-
-
-void LCodeGen::DoWrapReceiver(LWrapReceiver* instr) {
- Register receiver = ToRegister(instr->receiver());
- Register function = ToRegister(instr->function());
-
- // If the receiver is null or undefined, we have to pass the global
- // object as a receiver to normal functions. Values have to be
- // passed unchanged to builtins and strict-mode functions.
- Label global_object, receiver_ok;
- Label::Distance dist = DeoptEveryNTimes() ? Label::kFar : Label::kNear;
-
- if (!instr->hydrogen()->known_function()) {
- // Do not transform the receiver to object for strict mode
- // functions.
- __ movp(kScratchRegister,
- FieldOperand(function, JSFunction::kSharedFunctionInfoOffset));
- __ testb(FieldOperand(kScratchRegister,
- SharedFunctionInfo::kStrictModeByteOffset),
- Immediate(1 << SharedFunctionInfo::kStrictModeBitWithinByte));
- __ j(not_equal, &receiver_ok, dist);
-
- // Do not transform the receiver to object for builtins.
- __ testb(FieldOperand(kScratchRegister,
- SharedFunctionInfo::kNativeByteOffset),
- Immediate(1 << SharedFunctionInfo::kNativeBitWithinByte));
- __ j(not_equal, &receiver_ok, dist);
- }
-
- // Normal function. Replace undefined or null with global receiver.
- __ CompareRoot(receiver, Heap::kNullValueRootIndex);
- __ j(equal, &global_object, Label::kNear);
- __ CompareRoot(receiver, Heap::kUndefinedValueRootIndex);
- __ j(equal, &global_object, Label::kNear);
-
- // The receiver should be a JS object.
- Condition is_smi = __ CheckSmi(receiver);
- DeoptimizeIf(is_smi, instr, Deoptimizer::kSmi);
- __ CmpObjectType(receiver, FIRST_SPEC_OBJECT_TYPE, kScratchRegister);
- DeoptimizeIf(below, instr, Deoptimizer::kNotAJavaScriptObject);
-
- __ jmp(&receiver_ok, Label::kNear);
- __ bind(&global_object);
- __ movp(receiver, FieldOperand(function, JSFunction::kContextOffset));
- __ movp(receiver,
- Operand(receiver,
- Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX)));
- __ movp(receiver, FieldOperand(receiver, GlobalObject::kGlobalProxyOffset));
-
- __ bind(&receiver_ok);
-}
-
-
-void LCodeGen::DoApplyArguments(LApplyArguments* instr) {
- Register receiver = ToRegister(instr->receiver());
- Register function = ToRegister(instr->function());
- Register length = ToRegister(instr->length());
- Register elements = ToRegister(instr->elements());
- DCHECK(receiver.is(rax)); // Used for parameter count.
- DCHECK(function.is(rdi)); // Required by InvokeFunction.
- DCHECK(ToRegister(instr->result()).is(rax));
-
- // Copy the arguments to this function possibly from the
- // adaptor frame below it.
- const uint32_t kArgumentsLimit = 1 * KB;
- __ cmpp(length, Immediate(kArgumentsLimit));
- DeoptimizeIf(above, instr, Deoptimizer::kTooManyArguments);
-
- __ Push(receiver);
- __ movp(receiver, length);
-
- // Loop through the arguments pushing them onto the execution
- // stack.
- Label invoke, loop;
- // length is a small non-negative integer, due to the test above.
- __ testl(length, length);
- __ j(zero, &invoke, Label::kNear);
- __ bind(&loop);
- StackArgumentsAccessor args(elements, length,
- ARGUMENTS_DONT_CONTAIN_RECEIVER);
- __ Push(args.GetArgumentOperand(0));
- __ decl(length);
- __ j(not_zero, &loop);
-
- // Invoke the function.
- __ bind(&invoke);
- DCHECK(instr->HasPointerMap());
- LPointerMap* pointers = instr->pointer_map();
- SafepointGenerator safepoint_generator(
- this, pointers, Safepoint::kLazyDeopt);
- ParameterCount actual(rax);
- __ InvokeFunction(function, actual, CALL_FUNCTION, safepoint_generator);
-}
-
-
-void LCodeGen::DoPushArgument(LPushArgument* instr) {
- LOperand* argument = instr->value();
- EmitPushTaggedOperand(argument);
-}
-
-
-void LCodeGen::DoDrop(LDrop* instr) {
- __ Drop(instr->count());
-}
-
-
-void LCodeGen::DoThisFunction(LThisFunction* instr) {
- Register result = ToRegister(instr->result());
- __ movp(result, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset));
-}
-
-
-void LCodeGen::DoContext(LContext* instr) {
- Register result = ToRegister(instr->result());
- if (info()->IsOptimizing()) {
- __ movp(result, Operand(rbp, StandardFrameConstants::kContextOffset));
- } else {
- // If there is no frame, the context must be in rsi.
- DCHECK(result.is(rsi));
- }
-}
-
-
-void LCodeGen::DoDeclareGlobals(LDeclareGlobals* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- __ Push(instr->hydrogen()->pairs());
- __ Push(Smi::FromInt(instr->hydrogen()->flags()));
- CallRuntime(Runtime::kDeclareGlobals, 2, instr);
-}
-
-
-void LCodeGen::CallKnownFunction(Handle<JSFunction> function,
- int formal_parameter_count, int arity,
- LInstruction* instr) {
- bool dont_adapt_arguments =
- formal_parameter_count == SharedFunctionInfo::kDontAdaptArgumentsSentinel;
- bool can_invoke_directly =
- dont_adapt_arguments || formal_parameter_count == arity;
-
- Register function_reg = rdi;
- LPointerMap* pointers = instr->pointer_map();
-
- if (can_invoke_directly) {
- // Change context.
- __ movp(rsi, FieldOperand(function_reg, JSFunction::kContextOffset));
-
- // Always initialize rax to the number of actual arguments.
- __ Set(rax, arity);
-
- // Invoke function.
- if (function.is_identical_to(info()->closure())) {
- __ CallSelf();
- } else {
- __ Call(FieldOperand(function_reg, JSFunction::kCodeEntryOffset));
- }
-
- // Set up deoptimization.
- RecordSafepointWithLazyDeopt(instr, RECORD_SIMPLE_SAFEPOINT, 0);
- } else {
- // We need to adapt arguments.
- SafepointGenerator generator(
- this, pointers, Safepoint::kLazyDeopt);
- ParameterCount count(arity);
- ParameterCount expected(formal_parameter_count);
- __ InvokeFunction(function_reg, expected, count, CALL_FUNCTION, generator);
- }
-}
-
-
-void LCodeGen::DoCallWithDescriptor(LCallWithDescriptor* instr) {
- DCHECK(ToRegister(instr->result()).is(rax));
-
- if (instr->hydrogen()->IsTailCall()) {
- if (NeedsEagerFrame()) __ leave();
-
- if (instr->target()->IsConstantOperand()) {
- LConstantOperand* target = LConstantOperand::cast(instr->target());
- Handle<Code> code = Handle<Code>::cast(ToHandle(target));
- __ jmp(code, RelocInfo::CODE_TARGET);
- } else {
- DCHECK(instr->target()->IsRegister());
- Register target = ToRegister(instr->target());
- __ addp(target, Immediate(Code::kHeaderSize - kHeapObjectTag));
- __ jmp(target);
- }
- } else {
- LPointerMap* pointers = instr->pointer_map();
- SafepointGenerator generator(this, pointers, Safepoint::kLazyDeopt);
-
- if (instr->target()->IsConstantOperand()) {
- LConstantOperand* target = LConstantOperand::cast(instr->target());
- Handle<Code> code = Handle<Code>::cast(ToHandle(target));
- generator.BeforeCall(__ CallSize(code));
- __ call(code, RelocInfo::CODE_TARGET);
- } else {
- DCHECK(instr->target()->IsRegister());
- Register target = ToRegister(instr->target());
- generator.BeforeCall(__ CallSize(target));
- __ addp(target, Immediate(Code::kHeaderSize - kHeapObjectTag));
- __ call(target);
- }
- generator.AfterCall();
- }
-}
-
-
-void LCodeGen::DoCallJSFunction(LCallJSFunction* instr) {
- DCHECK(ToRegister(instr->function()).is(rdi));
- DCHECK(ToRegister(instr->result()).is(rax));
-
- __ Set(rax, instr->arity());
-
- // Change context.
- __ movp(rsi, FieldOperand(rdi, JSFunction::kContextOffset));
-
- LPointerMap* pointers = instr->pointer_map();
- SafepointGenerator generator(this, pointers, Safepoint::kLazyDeopt);
-
- bool is_self_call = false;
- if (instr->hydrogen()->function()->IsConstant()) {
- Handle<JSFunction> jsfun = Handle<JSFunction>::null();
- HConstant* fun_const = HConstant::cast(instr->hydrogen()->function());
- jsfun = Handle<JSFunction>::cast(fun_const->handle(isolate()));
- is_self_call = jsfun.is_identical_to(info()->closure());
- }
-
- if (is_self_call) {
- __ CallSelf();
- } else {
- Operand target = FieldOperand(rdi, JSFunction::kCodeEntryOffset);
- generator.BeforeCall(__ CallSize(target));
- __ Call(target);
- }
- generator.AfterCall();
-}
-
-
-void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LMathAbs* instr) {
- Register input_reg = ToRegister(instr->value());
- __ CompareRoot(FieldOperand(input_reg, HeapObject::kMapOffset),
- Heap::kHeapNumberMapRootIndex);
- DeoptimizeIf(not_equal, instr, Deoptimizer::kNotAHeapNumber);
-
- Label slow, allocated, done;
- Register tmp = input_reg.is(rax) ? rcx : rax;
- Register tmp2 = tmp.is(rcx) ? rdx : input_reg.is(rcx) ? rdx : rcx;
-
- // Preserve the value of all registers.
- PushSafepointRegistersScope scope(this);
-
- __ movl(tmp, FieldOperand(input_reg, HeapNumber::kExponentOffset));
- // Check the sign of the argument. If the argument is positive, just
- // return it. We do not need to patch the stack since |input| and
- // |result| are the same register and |input| will be restored
- // unchanged by popping safepoint registers.
- __ testl(tmp, Immediate(HeapNumber::kSignMask));
- __ j(zero, &done);
-
- __ AllocateHeapNumber(tmp, tmp2, &slow);
- __ jmp(&allocated, Label::kNear);
-
- // Slow case: Call the runtime system to do the number allocation.
- __ bind(&slow);
- CallRuntimeFromDeferred(
- Runtime::kAllocateHeapNumber, 0, instr, instr->context());
- // Set the pointer to the new heap number in tmp.
- if (!tmp.is(rax)) __ movp(tmp, rax);
- // Restore input_reg after call to runtime.
- __ LoadFromSafepointRegisterSlot(input_reg, input_reg);
-
- __ bind(&allocated);
- __ movq(tmp2, FieldOperand(input_reg, HeapNumber::kValueOffset));
- __ shlq(tmp2, Immediate(1));
- __ shrq(tmp2, Immediate(1));
- __ movq(FieldOperand(tmp, HeapNumber::kValueOffset), tmp2);
- __ StoreToSafepointRegisterSlot(input_reg, tmp);
-
- __ bind(&done);
-}
-
-
-void LCodeGen::EmitIntegerMathAbs(LMathAbs* instr) {
- Register input_reg = ToRegister(instr->value());
- __ testl(input_reg, input_reg);
- Label is_positive;
- __ j(not_sign, &is_positive, Label::kNear);
- __ negl(input_reg); // Sets flags.
- DeoptimizeIf(negative, instr, Deoptimizer::kOverflow);
- __ bind(&is_positive);
-}
-
-
-void LCodeGen::EmitSmiMathAbs(LMathAbs* instr) {
- Register input_reg = ToRegister(instr->value());
- __ testp(input_reg, input_reg);
- Label is_positive;
- __ j(not_sign, &is_positive, Label::kNear);
- __ negp(input_reg); // Sets flags.
- DeoptimizeIf(negative, instr, Deoptimizer::kOverflow);
- __ bind(&is_positive);
-}
-
-
-void LCodeGen::DoMathAbs(LMathAbs* instr) {
- // Class for deferred case.
- class DeferredMathAbsTaggedHeapNumber final : public LDeferredCode {
- public:
- DeferredMathAbsTaggedHeapNumber(LCodeGen* codegen, LMathAbs* instr)
- : LDeferredCode(codegen), instr_(instr) { }
- void Generate() override {
- codegen()->DoDeferredMathAbsTaggedHeapNumber(instr_);
- }
- LInstruction* instr() override { return instr_; }
-
- private:
- LMathAbs* instr_;
- };
-
- DCHECK(instr->value()->Equals(instr->result()));
- Representation r = instr->hydrogen()->value()->representation();
-
- if (r.IsDouble()) {
- XMMRegister scratch = double_scratch0();
- XMMRegister input_reg = ToDoubleRegister(instr->value());
- __ Xorpd(scratch, scratch);
- __ subsd(scratch, input_reg);
- __ andps(input_reg, scratch);
- } else if (r.IsInteger32()) {
- EmitIntegerMathAbs(instr);
- } else if (r.IsSmi()) {
- EmitSmiMathAbs(instr);
- } else { // Tagged case.
- DeferredMathAbsTaggedHeapNumber* deferred =
- new(zone()) DeferredMathAbsTaggedHeapNumber(this, instr);
- Register input_reg = ToRegister(instr->value());
- // Smi check.
- __ JumpIfNotSmi(input_reg, deferred->entry());
- EmitSmiMathAbs(instr);
- __ bind(deferred->exit());
- }
-}
-
-
-void LCodeGen::DoMathFloor(LMathFloor* instr) {
- XMMRegister xmm_scratch = double_scratch0();
- Register output_reg = ToRegister(instr->result());
- XMMRegister input_reg = ToDoubleRegister(instr->value());
-
- if (CpuFeatures::IsSupported(SSE4_1)) {
- CpuFeatureScope scope(masm(), SSE4_1);
- if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
- // Deoptimize if minus zero.
- __ Movq(output_reg, input_reg);
- __ subq(output_reg, Immediate(1));
- DeoptimizeIf(overflow, instr, Deoptimizer::kMinusZero);
- }
- __ roundsd(xmm_scratch, input_reg, kRoundDown);
- __ Cvttsd2si(output_reg, xmm_scratch);
- __ cmpl(output_reg, Immediate(0x1));
- DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow);
- } else {
- Label negative_sign, done;
- // Deoptimize on unordered.
- __ Xorpd(xmm_scratch, xmm_scratch); // Zero the register.
- __ Ucomisd(input_reg, xmm_scratch);
- DeoptimizeIf(parity_even, instr, Deoptimizer::kNaN);
- __ j(below, &negative_sign, Label::kNear);
-
- if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
- // Check for negative zero.
- Label positive_sign;
- __ j(above, &positive_sign, Label::kNear);
- __ Movmskpd(output_reg, input_reg);
- __ testl(output_reg, Immediate(1));
- DeoptimizeIf(not_zero, instr, Deoptimizer::kMinusZero);
- __ Set(output_reg, 0);
- __ jmp(&done);
- __ bind(&positive_sign);
- }
-
- // Use truncating instruction (OK because input is positive).
- __ Cvttsd2si(output_reg, input_reg);
- // Overflow is signalled with minint.
- __ cmpl(output_reg, Immediate(0x1));
- DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow);
- __ jmp(&done, Label::kNear);
-
- // Non-zero negative reaches here.
- __ bind(&negative_sign);
- // Truncate, then compare and compensate.
- __ Cvttsd2si(output_reg, input_reg);
- __ Cvtlsi2sd(xmm_scratch, output_reg);
- __ Ucomisd(input_reg, xmm_scratch);
- __ j(equal, &done, Label::kNear);
- __ subl(output_reg, Immediate(1));
- DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow);
-
- __ bind(&done);
- }
-}
-
-
-void LCodeGen::DoMathRound(LMathRound* instr) {
- const XMMRegister xmm_scratch = double_scratch0();
- Register output_reg = ToRegister(instr->result());
- XMMRegister input_reg = ToDoubleRegister(instr->value());
- XMMRegister input_temp = ToDoubleRegister(instr->temp());
- static int64_t one_half = V8_INT64_C(0x3FE0000000000000); // 0.5
- static int64_t minus_one_half = V8_INT64_C(0xBFE0000000000000); // -0.5
-
- Label done, round_to_zero, below_one_half;
- Label::Distance dist = DeoptEveryNTimes() ? Label::kFar : Label::kNear;
- __ movq(kScratchRegister, one_half);
- __ Movq(xmm_scratch, kScratchRegister);
- __ Ucomisd(xmm_scratch, input_reg);
- __ j(above, &below_one_half, Label::kNear);
-
- // CVTTSD2SI rounds towards zero, since 0.5 <= x, we use floor(0.5 + x).
- __ addsd(xmm_scratch, input_reg);
- __ Cvttsd2si(output_reg, xmm_scratch);
- // Overflow is signalled with minint.
- __ cmpl(output_reg, Immediate(0x1));
- DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow);
- __ jmp(&done, dist);
-
- __ bind(&below_one_half);
- __ movq(kScratchRegister, minus_one_half);
- __ Movq(xmm_scratch, kScratchRegister);
- __ Ucomisd(xmm_scratch, input_reg);
- __ j(below_equal, &round_to_zero, Label::kNear);
-
- // CVTTSD2SI rounds towards zero, we use ceil(x - (-0.5)) and then
- // compare and compensate.
- __ Movapd(input_temp, input_reg); // Do not alter input_reg.
- __ subsd(input_temp, xmm_scratch);
- __ Cvttsd2si(output_reg, input_temp);
- // Catch minint due to overflow, and to prevent overflow when compensating.
- __ cmpl(output_reg, Immediate(0x1));
- DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow);
-
- __ Cvtlsi2sd(xmm_scratch, output_reg);
- __ Ucomisd(xmm_scratch, input_temp);
- __ j(equal, &done, dist);
- __ subl(output_reg, Immediate(1));
- // No overflow because we already ruled out minint.
- __ jmp(&done, dist);
-
- __ bind(&round_to_zero);
- // We return 0 for the input range [+0, 0.5[, or [-0.5, 0.5[ if
- // we can ignore the difference between a result of -0 and +0.
- if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
- __ Movq(output_reg, input_reg);
- __ testq(output_reg, output_reg);
- DeoptimizeIf(negative, instr, Deoptimizer::kMinusZero);
- }
- __ Set(output_reg, 0);
- __ bind(&done);
-}
-
-
-void LCodeGen::DoMathFround(LMathFround* instr) {
- XMMRegister input_reg = ToDoubleRegister(instr->value());
- XMMRegister output_reg = ToDoubleRegister(instr->result());
- __ Cvtsd2ss(output_reg, input_reg);
- __ Cvtss2sd(output_reg, output_reg);
-}
-
-
-void LCodeGen::DoMathSqrt(LMathSqrt* instr) {
- XMMRegister output = ToDoubleRegister(instr->result());
- if (instr->value()->IsDoubleRegister()) {
- XMMRegister input = ToDoubleRegister(instr->value());
- __ sqrtsd(output, input);
- } else {
- Operand input = ToOperand(instr->value());
- __ sqrtsd(output, input);
- }
-}
-
-
-void LCodeGen::DoMathPowHalf(LMathPowHalf* instr) {
- XMMRegister xmm_scratch = double_scratch0();
- XMMRegister input_reg = ToDoubleRegister(instr->value());
- DCHECK(ToDoubleRegister(instr->result()).is(input_reg));
-
- // Note that according to ECMA-262 15.8.2.13:
- // Math.pow(-Infinity, 0.5) == Infinity
- // Math.sqrt(-Infinity) == NaN
- Label done, sqrt;
- // Check base for -Infinity. According to IEEE-754, double-precision
- // -Infinity has the highest 12 bits set and the lowest 52 bits cleared.
- __ movq(kScratchRegister, V8_INT64_C(0xFFF0000000000000));
- __ Movq(xmm_scratch, kScratchRegister);
- __ Ucomisd(xmm_scratch, input_reg);
- // Comparing -Infinity with NaN results in "unordered", which sets the
- // zero flag as if both were equal. However, it also sets the carry flag.
- __ j(not_equal, &sqrt, Label::kNear);
- __ j(carry, &sqrt, Label::kNear);
- // If input is -Infinity, return Infinity.
- __ Xorpd(input_reg, input_reg);
- __ subsd(input_reg, xmm_scratch);
- __ jmp(&done, Label::kNear);
-
- // Square root.
- __ bind(&sqrt);
- __ Xorpd(xmm_scratch, xmm_scratch);
- __ addsd(input_reg, xmm_scratch); // Convert -0 to +0.
- __ sqrtsd(input_reg, input_reg);
- __ bind(&done);
-}
-
-
-void LCodeGen::DoPower(LPower* instr) {
- Representation exponent_type = instr->hydrogen()->right()->representation();
- // Having marked this as a call, we can use any registers.
- // Just make sure that the input/output registers are the expected ones.
-
- Register tagged_exponent = MathPowTaggedDescriptor::exponent();
- DCHECK(!instr->right()->IsRegister() ||
- ToRegister(instr->right()).is(tagged_exponent));
- DCHECK(!instr->right()->IsDoubleRegister() ||
- ToDoubleRegister(instr->right()).is(xmm1));
- DCHECK(ToDoubleRegister(instr->left()).is(xmm2));
- DCHECK(ToDoubleRegister(instr->result()).is(xmm3));
-
- if (exponent_type.IsSmi()) {
- MathPowStub stub(isolate(), MathPowStub::TAGGED);
- __ CallStub(&stub);
- } else if (exponent_type.IsTagged()) {
- Label no_deopt;
- __ JumpIfSmi(tagged_exponent, &no_deopt, Label::kNear);
- __ CmpObjectType(tagged_exponent, HEAP_NUMBER_TYPE, rcx);
- DeoptimizeIf(not_equal, instr, Deoptimizer::kNotAHeapNumber);
- __ bind(&no_deopt);
- MathPowStub stub(isolate(), MathPowStub::TAGGED);
- __ CallStub(&stub);
- } else if (exponent_type.IsInteger32()) {
- MathPowStub stub(isolate(), MathPowStub::INTEGER);
- __ CallStub(&stub);
- } else {
- DCHECK(exponent_type.IsDouble());
- MathPowStub stub(isolate(), MathPowStub::DOUBLE);
- __ CallStub(&stub);
- }
-}
-
-
-void LCodeGen::DoMathExp(LMathExp* instr) {
- XMMRegister input = ToDoubleRegister(instr->value());
- XMMRegister result = ToDoubleRegister(instr->result());
- XMMRegister temp0 = double_scratch0();
- Register temp1 = ToRegister(instr->temp1());
- Register temp2 = ToRegister(instr->temp2());
-
- MathExpGenerator::EmitMathExp(masm(), input, result, temp0, temp1, temp2);
-}
-
-
-void LCodeGen::DoMathLog(LMathLog* instr) {
- DCHECK(instr->value()->Equals(instr->result()));
- XMMRegister input_reg = ToDoubleRegister(instr->value());
- XMMRegister xmm_scratch = double_scratch0();
- Label positive, done, zero;
- __ Xorpd(xmm_scratch, xmm_scratch);
- __ Ucomisd(input_reg, xmm_scratch);
- __ j(above, &positive, Label::kNear);
- __ j(not_carry, &zero, Label::kNear);
- __ pcmpeqd(input_reg, input_reg);
- __ jmp(&done, Label::kNear);
- __ bind(&zero);
- ExternalReference ninf =
- ExternalReference::address_of_negative_infinity();
- Operand ninf_operand = masm()->ExternalOperand(ninf);
- __ Movsd(input_reg, ninf_operand);
- __ jmp(&done, Label::kNear);
- __ bind(&positive);
- __ fldln2();
- __ subp(rsp, Immediate(kDoubleSize));
- __ Movsd(Operand(rsp, 0), input_reg);
- __ fld_d(Operand(rsp, 0));
- __ fyl2x();
- __ fstp_d(Operand(rsp, 0));
- __ Movsd(input_reg, Operand(rsp, 0));
- __ addp(rsp, Immediate(kDoubleSize));
- __ bind(&done);
-}
-
-
-void LCodeGen::DoMathClz32(LMathClz32* instr) {
- Register input = ToRegister(instr->value());
- Register result = ToRegister(instr->result());
-
- __ Lzcntl(result, input);
-}
-
-
-void LCodeGen::DoInvokeFunction(LInvokeFunction* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- DCHECK(ToRegister(instr->function()).is(rdi));
- DCHECK(instr->HasPointerMap());
-
- Handle<JSFunction> known_function = instr->hydrogen()->known_function();
- if (known_function.is_null()) {
- LPointerMap* pointers = instr->pointer_map();
- SafepointGenerator generator(this, pointers, Safepoint::kLazyDeopt);
- ParameterCount count(instr->arity());
- __ InvokeFunction(rdi, count, CALL_FUNCTION, generator);
- } else {
- CallKnownFunction(known_function,
- instr->hydrogen()->formal_parameter_count(),
- instr->arity(), instr);
- }
-}
-
-
-void LCodeGen::DoCallFunction(LCallFunction* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- DCHECK(ToRegister(instr->function()).is(rdi));
- DCHECK(ToRegister(instr->result()).is(rax));
-
- int arity = instr->arity();
- CallFunctionFlags flags = instr->hydrogen()->function_flags();
- if (instr->hydrogen()->HasVectorAndSlot()) {
- Register slot_register = ToRegister(instr->temp_slot());
- Register vector_register = ToRegister(instr->temp_vector());
- DCHECK(slot_register.is(rdx));
- DCHECK(vector_register.is(rbx));
-
- AllowDeferredHandleDereference vector_structure_check;
- Handle<TypeFeedbackVector> vector = instr->hydrogen()->feedback_vector();
- int index = vector->GetIndex(instr->hydrogen()->slot());
-
- __ Move(vector_register, vector);
- __ Move(slot_register, Smi::FromInt(index));
-
- CallICState::CallType call_type =
- (flags & CALL_AS_METHOD) ? CallICState::METHOD : CallICState::FUNCTION;
-
- Handle<Code> ic =
- CodeFactory::CallICInOptimizedCode(isolate(), arity, call_type).code();
- CallCode(ic, RelocInfo::CODE_TARGET, instr);
- } else {
- CallFunctionStub stub(isolate(), arity, flags);
- CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
- }
-}
-
-
-void LCodeGen::DoCallNew(LCallNew* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- DCHECK(ToRegister(instr->constructor()).is(rdi));
- DCHECK(ToRegister(instr->result()).is(rax));
-
- __ Set(rax, instr->arity());
- // No cell in ebx for construct type feedback in optimized code
- __ LoadRoot(rbx, Heap::kUndefinedValueRootIndex);
- CallConstructStub stub(isolate(), NO_CALL_CONSTRUCTOR_FLAGS);
- CallCode(stub.GetCode(), RelocInfo::CONSTRUCT_CALL, instr);
-}
-
-
-void LCodeGen::DoCallNewArray(LCallNewArray* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- DCHECK(ToRegister(instr->constructor()).is(rdi));
- DCHECK(ToRegister(instr->result()).is(rax));
-
- __ Set(rax, instr->arity());
- if (instr->arity() == 1) {
- // We only need the allocation site for the case we have a length argument.
- // The case may bail out to the runtime, which will determine the correct
- // elements kind with the site.
- __ Move(rbx, instr->hydrogen()->site());
- } else {
- __ LoadRoot(rbx, Heap::kUndefinedValueRootIndex);
- }
-
- ElementsKind kind = instr->hydrogen()->elements_kind();
- AllocationSiteOverrideMode override_mode =
- (AllocationSite::GetMode(kind) == TRACK_ALLOCATION_SITE)
- ? DISABLE_ALLOCATION_SITES
- : DONT_OVERRIDE;
-
- if (instr->arity() == 0) {
- ArrayNoArgumentConstructorStub stub(isolate(), kind, override_mode);
- CallCode(stub.GetCode(), RelocInfo::CONSTRUCT_CALL, instr);
- } else if (instr->arity() == 1) {
- Label done;
- if (IsFastPackedElementsKind(kind)) {
- Label packed_case;
- // We might need a change here
- // look at the first argument
- __ movp(rcx, Operand(rsp, 0));
- __ testp(rcx, rcx);
- __ j(zero, &packed_case, Label::kNear);
-
- ElementsKind holey_kind = GetHoleyElementsKind(kind);
- ArraySingleArgumentConstructorStub stub(isolate(),
- holey_kind,
- override_mode);
- CallCode(stub.GetCode(), RelocInfo::CONSTRUCT_CALL, instr);
- __ jmp(&done, Label::kNear);
- __ bind(&packed_case);
- }
-
- ArraySingleArgumentConstructorStub stub(isolate(), kind, override_mode);
- CallCode(stub.GetCode(), RelocInfo::CONSTRUCT_CALL, instr);
- __ bind(&done);
- } else {
- ArrayNArgumentsConstructorStub stub(isolate(), kind, override_mode);
- CallCode(stub.GetCode(), RelocInfo::CONSTRUCT_CALL, instr);
- }
-}
-
-
-void LCodeGen::DoCallRuntime(LCallRuntime* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- CallRuntime(instr->function(), instr->arity(), instr, instr->save_doubles());
-}
-
-
-void LCodeGen::DoStoreCodeEntry(LStoreCodeEntry* instr) {
- Register function = ToRegister(instr->function());
- Register code_object = ToRegister(instr->code_object());
- __ leap(code_object, FieldOperand(code_object, Code::kHeaderSize));
- __ movp(FieldOperand(function, JSFunction::kCodeEntryOffset), code_object);
-}
-
-
-void LCodeGen::DoInnerAllocatedObject(LInnerAllocatedObject* instr) {
- Register result = ToRegister(instr->result());
- Register base = ToRegister(instr->base_object());
- if (instr->offset()->IsConstantOperand()) {
- LConstantOperand* offset = LConstantOperand::cast(instr->offset());
- __ leap(result, Operand(base, ToInteger32(offset)));
- } else {
- Register offset = ToRegister(instr->offset());
- __ leap(result, Operand(base, offset, times_1, 0));
- }
-}
-
-
-void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
- HStoreNamedField* hinstr = instr->hydrogen();
- Representation representation = instr->representation();
-
- HObjectAccess access = hinstr->access();
- int offset = access.offset();
-
- if (access.IsExternalMemory()) {
- DCHECK(!hinstr->NeedsWriteBarrier());
- Register value = ToRegister(instr->value());
- if (instr->object()->IsConstantOperand()) {
- DCHECK(value.is(rax));
- LConstantOperand* object = LConstantOperand::cast(instr->object());
- __ store_rax(ToExternalReference(object));
- } else {
- Register object = ToRegister(instr->object());
- __ Store(MemOperand(object, offset), value, representation);
- }
- return;
- }
-
- Register object = ToRegister(instr->object());
- __ AssertNotSmi(object);
-
- DCHECK(!representation.IsSmi() ||
- !instr->value()->IsConstantOperand() ||
- IsInteger32Constant(LConstantOperand::cast(instr->value())));
- if (!FLAG_unbox_double_fields && representation.IsDouble()) {
- DCHECK(access.IsInobject());
- DCHECK(!hinstr->has_transition());
- DCHECK(!hinstr->NeedsWriteBarrier());
- XMMRegister value = ToDoubleRegister(instr->value());
- __ Movsd(FieldOperand(object, offset), value);
- return;
- }
-
- if (hinstr->has_transition()) {
- Handle<Map> transition = hinstr->transition_map();
- AddDeprecationDependency(transition);
- if (!hinstr->NeedsWriteBarrierForMap()) {
- __ Move(FieldOperand(object, HeapObject::kMapOffset), transition);
- } else {
- Register temp = ToRegister(instr->temp());
- __ Move(kScratchRegister, transition);
- __ movp(FieldOperand(object, HeapObject::kMapOffset), kScratchRegister);
- // Update the write barrier for the map field.
- __ RecordWriteForMap(object,
- kScratchRegister,
- temp,
- kSaveFPRegs);
- }
- }
-
- // Do the store.
- Register write_register = object;
- if (!access.IsInobject()) {
- write_register = ToRegister(instr->temp());
- __ movp(write_register, FieldOperand(object, JSObject::kPropertiesOffset));
- }
-
- if (representation.IsSmi() && SmiValuesAre32Bits() &&
- hinstr->value()->representation().IsInteger32()) {
- DCHECK(hinstr->store_mode() == STORE_TO_INITIALIZED_ENTRY);
- if (FLAG_debug_code) {
- Register scratch = kScratchRegister;
- __ Load(scratch, FieldOperand(write_register, offset), representation);
- __ AssertSmi(scratch);
- }
- // Store int value directly to upper half of the smi.
- STATIC_ASSERT(kSmiTag == 0);
- DCHECK(kSmiTagSize + kSmiShiftSize == 32);
- offset += kPointerSize / 2;
- representation = Representation::Integer32();
- }
-
- Operand operand = FieldOperand(write_register, offset);
-
- if (FLAG_unbox_double_fields && representation.IsDouble()) {
- DCHECK(access.IsInobject());
- XMMRegister value = ToDoubleRegister(instr->value());
- __ Movsd(operand, value);
-
- } else if (instr->value()->IsRegister()) {
- Register value = ToRegister(instr->value());
- __ Store(operand, value, representation);
- } else {
- LConstantOperand* operand_value = LConstantOperand::cast(instr->value());
- if (IsInteger32Constant(operand_value)) {
- DCHECK(!hinstr->NeedsWriteBarrier());
- int32_t value = ToInteger32(operand_value);
- if (representation.IsSmi()) {
- __ Move(operand, Smi::FromInt(value));
-
- } else {
- __ movl(operand, Immediate(value));
- }
-
- } else if (IsExternalConstant(operand_value)) {
- DCHECK(!hinstr->NeedsWriteBarrier());
- ExternalReference ptr = ToExternalReference(operand_value);
- __ Move(kScratchRegister, ptr);
- __ movp(operand, kScratchRegister);
- } else {
- Handle<Object> handle_value = ToHandle(operand_value);
- DCHECK(!hinstr->NeedsWriteBarrier());
- __ Move(operand, handle_value);
- }
- }
-
- if (hinstr->NeedsWriteBarrier()) {
- Register value = ToRegister(instr->value());
- Register temp = access.IsInobject() ? ToRegister(instr->temp()) : object;
- // Update the write barrier for the object for in-object properties.
- __ RecordWriteField(write_register,
- offset,
- value,
- temp,
- kSaveFPRegs,
- EMIT_REMEMBERED_SET,
- hinstr->SmiCheckForWriteBarrier(),
- hinstr->PointersToHereCheckForValue());
- }
-}
-
-
-void LCodeGen::DoStoreNamedGeneric(LStoreNamedGeneric* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- DCHECK(ToRegister(instr->object()).is(StoreDescriptor::ReceiverRegister()));
- DCHECK(ToRegister(instr->value()).is(StoreDescriptor::ValueRegister()));
-
- if (instr->hydrogen()->HasVectorAndSlot()) {
- EmitVectorStoreICRegisters<LStoreNamedGeneric>(instr);
- }
-
- __ Move(StoreDescriptor::NameRegister(), instr->hydrogen()->name());
- Handle<Code> ic = CodeFactory::StoreICInOptimizedCode(
- isolate(), instr->language_mode(),
- instr->hydrogen()->initialization_state()).code();
- CallCode(ic, RelocInfo::CODE_TARGET, instr);
-}
-
-
-void LCodeGen::DoStoreGlobalViaContext(LStoreGlobalViaContext* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- DCHECK(ToRegister(instr->value())
- .is(StoreGlobalViaContextDescriptor::ValueRegister()));
- int const slot = instr->slot_index();
- int const depth = instr->depth();
- if (depth <= StoreGlobalViaContextStub::kMaximumDepth) {
- __ Set(StoreGlobalViaContextDescriptor::SlotRegister(), slot);
- Handle<Code> stub = CodeFactory::StoreGlobalViaContext(
- isolate(), depth, instr->language_mode())
- .code();
- CallCode(stub, RelocInfo::CODE_TARGET, instr);
- } else {
- __ Push(Smi::FromInt(slot));
- __ Push(StoreGlobalViaContextDescriptor::ValueRegister());
- __ CallRuntime(is_strict(instr->language_mode())
- ? Runtime::kStoreGlobalViaContext_Strict
- : Runtime::kStoreGlobalViaContext_Sloppy,
- 2);
- }
-}
-
-
-void LCodeGen::DoBoundsCheck(LBoundsCheck* instr) {
- Representation representation = instr->hydrogen()->length()->representation();
- DCHECK(representation.Equals(instr->hydrogen()->index()->representation()));
- DCHECK(representation.IsSmiOrInteger32());
-
- Condition cc = instr->hydrogen()->allow_equality() ? below : below_equal;
- if (instr->length()->IsConstantOperand()) {
- int32_t length = ToInteger32(LConstantOperand::cast(instr->length()));
- Register index = ToRegister(instr->index());
- if (representation.IsSmi()) {
- __ Cmp(index, Smi::FromInt(length));
- } else {
- __ cmpl(index, Immediate(length));
- }
- cc = CommuteCondition(cc);
- } else if (instr->index()->IsConstantOperand()) {
- int32_t index = ToInteger32(LConstantOperand::cast(instr->index()));
- if (instr->length()->IsRegister()) {
- Register length = ToRegister(instr->length());
- if (representation.IsSmi()) {
- __ Cmp(length, Smi::FromInt(index));
- } else {
- __ cmpl(length, Immediate(index));
- }
- } else {
- Operand length = ToOperand(instr->length());
- if (representation.IsSmi()) {
- __ Cmp(length, Smi::FromInt(index));
- } else {
- __ cmpl(length, Immediate(index));
- }
- }
- } else {
- Register index = ToRegister(instr->index());
- if (instr->length()->IsRegister()) {
- Register length = ToRegister(instr->length());
- if (representation.IsSmi()) {
- __ cmpp(length, index);
- } else {
- __ cmpl(length, index);
- }
- } else {
- Operand length = ToOperand(instr->length());
- if (representation.IsSmi()) {
- __ cmpp(length, index);
- } else {
- __ cmpl(length, index);
- }
- }
- }
- if (FLAG_debug_code && instr->hydrogen()->skip_check()) {
- Label done;
- __ j(NegateCondition(cc), &done, Label::kNear);
- __ int3();
- __ bind(&done);
- } else {
- DeoptimizeIf(cc, instr, Deoptimizer::kOutOfBounds);
- }
-}
-
-
-void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
- ElementsKind elements_kind = instr->elements_kind();
- LOperand* key = instr->key();
- if (kPointerSize == kInt32Size && !key->IsConstantOperand()) {
- Register key_reg = ToRegister(key);
- Representation key_representation =
- instr->hydrogen()->key()->representation();
- if (ExternalArrayOpRequiresTemp(key_representation, elements_kind)) {
- __ SmiToInteger64(key_reg, key_reg);
- } else if (instr->hydrogen()->IsDehoisted()) {
- // Sign extend key because it could be a 32 bit negative value
- // and the dehoisted address computation happens in 64 bits
- __ movsxlq(key_reg, key_reg);
- }
- }
- Operand operand(BuildFastArrayOperand(
- instr->elements(),
- key,
- instr->hydrogen()->key()->representation(),
- elements_kind,
- instr->base_offset()));
-
- if (elements_kind == FLOAT32_ELEMENTS) {
- XMMRegister value(ToDoubleRegister(instr->value()));
- __ Cvtsd2ss(value, value);
- __ Movss(operand, value);
- } else if (elements_kind == FLOAT64_ELEMENTS) {
- __ Movsd(operand, ToDoubleRegister(instr->value()));
- } else {
- Register value(ToRegister(instr->value()));
- switch (elements_kind) {
- case INT8_ELEMENTS:
- case UINT8_ELEMENTS:
- case UINT8_CLAMPED_ELEMENTS:
- __ movb(operand, value);
- break;
- case INT16_ELEMENTS:
- case UINT16_ELEMENTS:
- __ movw(operand, value);
- break;
- case INT32_ELEMENTS:
- case UINT32_ELEMENTS:
- __ movl(operand, value);
- break;
- case FLOAT32_ELEMENTS:
- case FLOAT64_ELEMENTS:
- case FAST_ELEMENTS:
- case FAST_SMI_ELEMENTS:
- case FAST_DOUBLE_ELEMENTS:
- case FAST_HOLEY_ELEMENTS:
- case FAST_HOLEY_SMI_ELEMENTS:
- case FAST_HOLEY_DOUBLE_ELEMENTS:
- case DICTIONARY_ELEMENTS:
- case FAST_SLOPPY_ARGUMENTS_ELEMENTS:
- case SLOW_SLOPPY_ARGUMENTS_ELEMENTS:
- UNREACHABLE();
- break;
- }
- }
-}
-
-
-void LCodeGen::DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr) {
- XMMRegister value = ToDoubleRegister(instr->value());
- LOperand* key = instr->key();
- if (kPointerSize == kInt32Size && !key->IsConstantOperand() &&
- instr->hydrogen()->IsDehoisted()) {
- // Sign extend key because it could be a 32 bit negative value
- // and the dehoisted address computation happens in 64 bits
- __ movsxlq(ToRegister(key), ToRegister(key));
- }
- if (instr->NeedsCanonicalization()) {
- XMMRegister xmm_scratch = double_scratch0();
- // Turn potential sNaN value into qNaN.
- __ Xorpd(xmm_scratch, xmm_scratch);
- __ subsd(value, xmm_scratch);
- }
-
- Operand double_store_operand = BuildFastArrayOperand(
- instr->elements(),
- key,
- instr->hydrogen()->key()->representation(),
- FAST_DOUBLE_ELEMENTS,
- instr->base_offset());
-
- __ Movsd(double_store_operand, value);
-}
-
-
-void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
- HStoreKeyed* hinstr = instr->hydrogen();
- LOperand* key = instr->key();
- int offset = instr->base_offset();
- Representation representation = hinstr->value()->representation();
-
- if (kPointerSize == kInt32Size && !key->IsConstantOperand() &&
- instr->hydrogen()->IsDehoisted()) {
- // Sign extend key because it could be a 32 bit negative value
- // and the dehoisted address computation happens in 64 bits
- __ movsxlq(ToRegister(key), ToRegister(key));
- }
- if (representation.IsInteger32() && SmiValuesAre32Bits()) {
- DCHECK(hinstr->store_mode() == STORE_TO_INITIALIZED_ENTRY);
- DCHECK(hinstr->elements_kind() == FAST_SMI_ELEMENTS);
- if (FLAG_debug_code) {
- Register scratch = kScratchRegister;
- __ Load(scratch,
- BuildFastArrayOperand(instr->elements(),
- key,
- instr->hydrogen()->key()->representation(),
- FAST_ELEMENTS,
- offset),
- Representation::Smi());
- __ AssertSmi(scratch);
- }
- // Store int value directly to upper half of the smi.
- STATIC_ASSERT(kSmiTag == 0);
- DCHECK(kSmiTagSize + kSmiShiftSize == 32);
- offset += kPointerSize / 2;
- }
-
- Operand operand =
- BuildFastArrayOperand(instr->elements(),
- key,
- instr->hydrogen()->key()->representation(),
- FAST_ELEMENTS,
- offset);
- if (instr->value()->IsRegister()) {
- __ Store(operand, ToRegister(instr->value()), representation);
- } else {
- LConstantOperand* operand_value = LConstantOperand::cast(instr->value());
- if (IsInteger32Constant(operand_value)) {
- int32_t value = ToInteger32(operand_value);
- if (representation.IsSmi()) {
- __ Move(operand, Smi::FromInt(value));
-
- } else {
- __ movl(operand, Immediate(value));
- }
- } else {
- Handle<Object> handle_value = ToHandle(operand_value);
- __ Move(operand, handle_value);
- }
- }
-
- if (hinstr->NeedsWriteBarrier()) {
- Register elements = ToRegister(instr->elements());
- DCHECK(instr->value()->IsRegister());
- Register value = ToRegister(instr->value());
- DCHECK(!key->IsConstantOperand());
- SmiCheck check_needed = hinstr->value()->type().IsHeapObject()
- ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
- // Compute address of modified element and store it into key register.
- Register key_reg(ToRegister(key));
- __ leap(key_reg, operand);
- __ RecordWrite(elements,
- key_reg,
- value,
- kSaveFPRegs,
- EMIT_REMEMBERED_SET,
- check_needed,
- hinstr->PointersToHereCheckForValue());
- }
-}
-
-
-void LCodeGen::DoStoreKeyed(LStoreKeyed* instr) {
- if (instr->is_fixed_typed_array()) {
- DoStoreKeyedExternalArray(instr);
- } else if (instr->hydrogen()->value()->representation().IsDouble()) {
- DoStoreKeyedFixedDoubleArray(instr);
- } else {
- DoStoreKeyedFixedArray(instr);
- }
-}
-
-
-void LCodeGen::DoStoreKeyedGeneric(LStoreKeyedGeneric* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- DCHECK(ToRegister(instr->object()).is(StoreDescriptor::ReceiverRegister()));
- DCHECK(ToRegister(instr->key()).is(StoreDescriptor::NameRegister()));
- DCHECK(ToRegister(instr->value()).is(StoreDescriptor::ValueRegister()));
-
- if (instr->hydrogen()->HasVectorAndSlot()) {
- EmitVectorStoreICRegisters<LStoreKeyedGeneric>(instr);
- }
-
- Handle<Code> ic = CodeFactory::KeyedStoreICInOptimizedCode(
- isolate(), instr->language_mode(),
- instr->hydrogen()->initialization_state()).code();
- CallCode(ic, RelocInfo::CODE_TARGET, instr);
-}
-
-
-void LCodeGen::DoMaybeGrowElements(LMaybeGrowElements* instr) {
- class DeferredMaybeGrowElements final : public LDeferredCode {
- public:
- DeferredMaybeGrowElements(LCodeGen* codegen, LMaybeGrowElements* instr)
- : LDeferredCode(codegen), instr_(instr) {}
- void Generate() override { codegen()->DoDeferredMaybeGrowElements(instr_); }
- LInstruction* instr() override { return instr_; }
-
- private:
- LMaybeGrowElements* instr_;
- };
-
- Register result = rax;
- DeferredMaybeGrowElements* deferred =
- new (zone()) DeferredMaybeGrowElements(this, instr);
- LOperand* key = instr->key();
- LOperand* current_capacity = instr->current_capacity();
-
- DCHECK(instr->hydrogen()->key()->representation().IsInteger32());
- DCHECK(instr->hydrogen()->current_capacity()->representation().IsInteger32());
- DCHECK(key->IsConstantOperand() || key->IsRegister());
- DCHECK(current_capacity->IsConstantOperand() ||
- current_capacity->IsRegister());
-
- if (key->IsConstantOperand() && current_capacity->IsConstantOperand()) {
- int32_t constant_key = ToInteger32(LConstantOperand::cast(key));
- int32_t constant_capacity =
- ToInteger32(LConstantOperand::cast(current_capacity));
- if (constant_key >= constant_capacity) {
- // Deferred case.
- __ jmp(deferred->entry());
- }
- } else if (key->IsConstantOperand()) {
- int32_t constant_key = ToInteger32(LConstantOperand::cast(key));
- __ cmpl(ToRegister(current_capacity), Immediate(constant_key));
- __ j(less_equal, deferred->entry());
- } else if (current_capacity->IsConstantOperand()) {
- int32_t constant_capacity =
- ToInteger32(LConstantOperand::cast(current_capacity));
- __ cmpl(ToRegister(key), Immediate(constant_capacity));
- __ j(greater_equal, deferred->entry());
- } else {
- __ cmpl(ToRegister(key), ToRegister(current_capacity));
- __ j(greater_equal, deferred->entry());
- }
-
- if (instr->elements()->IsRegister()) {
- __ movp(result, ToRegister(instr->elements()));
- } else {
- __ movp(result, ToOperand(instr->elements()));
- }
-
- __ bind(deferred->exit());
-}
-
-
-void LCodeGen::DoDeferredMaybeGrowElements(LMaybeGrowElements* instr) {
- // TODO(3095996): Get rid of this. For now, we need to make the
- // result register contain a valid pointer because it is already
- // contained in the register pointer map.
- Register result = rax;
- __ Move(result, Smi::FromInt(0));
-
- // We have to call a stub.
- {
- PushSafepointRegistersScope scope(this);
- if (instr->object()->IsConstantOperand()) {
- LConstantOperand* constant_object =
- LConstantOperand::cast(instr->object());
- if (IsSmiConstant(constant_object)) {
- Smi* immediate = ToSmi(constant_object);
- __ Move(result, immediate);
- } else {
- Handle<Object> handle_value = ToHandle(constant_object);
- __ Move(result, handle_value);
- }
- } else if (instr->object()->IsRegister()) {
- __ Move(result, ToRegister(instr->object()));
- } else {
- __ movp(result, ToOperand(instr->object()));
- }
-
- LOperand* key = instr->key();
- if (key->IsConstantOperand()) {
- __ Move(rbx, ToSmi(LConstantOperand::cast(key)));
- } else {
- __ Move(rbx, ToRegister(key));
- __ Integer32ToSmi(rbx, rbx);
- }
-
- GrowArrayElementsStub stub(isolate(), instr->hydrogen()->is_js_array(),
- instr->hydrogen()->kind());
- __ CallStub(&stub);
- RecordSafepointWithLazyDeopt(instr, RECORD_SAFEPOINT_WITH_REGISTERS, 0);
- __ StoreToSafepointRegisterSlot(result, result);
- }
-
- // Deopt on smi, which means the elements array changed to dictionary mode.
- Condition is_smi = __ CheckSmi(result);
- DeoptimizeIf(is_smi, instr, Deoptimizer::kSmi);
-}
-
-
-void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) {
- Register object_reg = ToRegister(instr->object());
-
- Handle<Map> from_map = instr->original_map();
- Handle<Map> to_map = instr->transitioned_map();
- ElementsKind from_kind = instr->from_kind();
- ElementsKind to_kind = instr->to_kind();
-
- Label not_applicable;
- __ Cmp(FieldOperand(object_reg, HeapObject::kMapOffset), from_map);
- __ j(not_equal, &not_applicable);
- if (IsSimpleMapChangeTransition(from_kind, to_kind)) {
- Register new_map_reg = ToRegister(instr->new_map_temp());
- __ Move(new_map_reg, to_map, RelocInfo::EMBEDDED_OBJECT);
- __ movp(FieldOperand(object_reg, HeapObject::kMapOffset), new_map_reg);
- // Write barrier.
- __ RecordWriteForMap(object_reg, new_map_reg, ToRegister(instr->temp()),
- kDontSaveFPRegs);
- } else {
- DCHECK(object_reg.is(rax));
- DCHECK(ToRegister(instr->context()).is(rsi));
- PushSafepointRegistersScope scope(this);
- __ Move(rbx, to_map);
- bool is_js_array = from_map->instance_type() == JS_ARRAY_TYPE;
- TransitionElementsKindStub stub(isolate(), from_kind, to_kind, is_js_array);
- __ CallStub(&stub);
- RecordSafepointWithLazyDeopt(instr, RECORD_SAFEPOINT_WITH_REGISTERS, 0);
- }
- __ bind(&not_applicable);
-}
-
-
-void LCodeGen::DoTrapAllocationMemento(LTrapAllocationMemento* instr) {
- Register object = ToRegister(instr->object());
- Register temp = ToRegister(instr->temp());
- Label no_memento_found;
- __ TestJSArrayForAllocationMemento(object, temp, &no_memento_found);
- DeoptimizeIf(equal, instr, Deoptimizer::kMementoFound);
- __ bind(&no_memento_found);
-}
-
-
-void LCodeGen::DoStringAdd(LStringAdd* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- DCHECK(ToRegister(instr->left()).is(rdx));
- DCHECK(ToRegister(instr->right()).is(rax));
- StringAddStub stub(isolate(),
- instr->hydrogen()->flags(),
- instr->hydrogen()->pretenure_flag());
- CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
-}
-
-
-void LCodeGen::DoStringCharCodeAt(LStringCharCodeAt* instr) {
- class DeferredStringCharCodeAt final : public LDeferredCode {
- public:
- DeferredStringCharCodeAt(LCodeGen* codegen, LStringCharCodeAt* instr)
- : LDeferredCode(codegen), instr_(instr) { }
- void Generate() override { codegen()->DoDeferredStringCharCodeAt(instr_); }
- LInstruction* instr() override { return instr_; }
-
- private:
- LStringCharCodeAt* instr_;
- };
-
- DeferredStringCharCodeAt* deferred =
- new(zone()) DeferredStringCharCodeAt(this, instr);
-
- StringCharLoadGenerator::Generate(masm(),
- ToRegister(instr->string()),
- ToRegister(instr->index()),
- ToRegister(instr->result()),
- deferred->entry());
- __ bind(deferred->exit());
-}
-
-
-void LCodeGen::DoDeferredStringCharCodeAt(LStringCharCodeAt* instr) {
- Register string = ToRegister(instr->string());
- Register result = ToRegister(instr->result());
-
- // TODO(3095996): Get rid of this. For now, we need to make the
- // result register contain a valid pointer because it is already
- // contained in the register pointer map.
- __ Set(result, 0);
-
- PushSafepointRegistersScope scope(this);
- __ Push(string);
- // Push the index as a smi. This is safe because of the checks in
- // DoStringCharCodeAt above.
- STATIC_ASSERT(String::kMaxLength <= Smi::kMaxValue);
- if (instr->index()->IsConstantOperand()) {
- int32_t const_index = ToInteger32(LConstantOperand::cast(instr->index()));
- __ Push(Smi::FromInt(const_index));
- } else {
- Register index = ToRegister(instr->index());
- __ Integer32ToSmi(index, index);
- __ Push(index);
- }
- CallRuntimeFromDeferred(
- Runtime::kStringCharCodeAtRT, 2, instr, instr->context());
- __ AssertSmi(rax);
- __ SmiToInteger32(rax, rax);
- __ StoreToSafepointRegisterSlot(result, rax);
-}
-
-
-void LCodeGen::DoStringCharFromCode(LStringCharFromCode* instr) {
- class DeferredStringCharFromCode final : public LDeferredCode {
- public:
- DeferredStringCharFromCode(LCodeGen* codegen, LStringCharFromCode* instr)
- : LDeferredCode(codegen), instr_(instr) { }
- void Generate() override {
- codegen()->DoDeferredStringCharFromCode(instr_);
- }
- LInstruction* instr() override { return instr_; }
-
- private:
- LStringCharFromCode* instr_;
- };
-
- DeferredStringCharFromCode* deferred =
- new(zone()) DeferredStringCharFromCode(this, instr);
-
- DCHECK(instr->hydrogen()->value()->representation().IsInteger32());
- Register char_code = ToRegister(instr->char_code());
- Register result = ToRegister(instr->result());
- DCHECK(!char_code.is(result));
-
- __ cmpl(char_code, Immediate(String::kMaxOneByteCharCode));
- __ j(above, deferred->entry());
- __ movsxlq(char_code, char_code);
- __ LoadRoot(result, Heap::kSingleCharacterStringCacheRootIndex);
- __ movp(result, FieldOperand(result,
- char_code, times_pointer_size,
- FixedArray::kHeaderSize));
- __ CompareRoot(result, Heap::kUndefinedValueRootIndex);
- __ j(equal, deferred->entry());
- __ bind(deferred->exit());
-}
-
-
-void LCodeGen::DoDeferredStringCharFromCode(LStringCharFromCode* instr) {
- Register char_code = ToRegister(instr->char_code());
- Register result = ToRegister(instr->result());
-
- // TODO(3095996): Get rid of this. For now, we need to make the
- // result register contain a valid pointer because it is already
- // contained in the register pointer map.
- __ Set(result, 0);
-
- PushSafepointRegistersScope scope(this);
- __ Integer32ToSmi(char_code, char_code);
- __ Push(char_code);
- CallRuntimeFromDeferred(Runtime::kCharFromCode, 1, instr, instr->context());
- __ StoreToSafepointRegisterSlot(result, rax);
-}
-
-
-void LCodeGen::DoInteger32ToDouble(LInteger32ToDouble* instr) {
- LOperand* input = instr->value();
- DCHECK(input->IsRegister() || input->IsStackSlot());
- LOperand* output = instr->result();
- DCHECK(output->IsDoubleRegister());
- if (input->IsRegister()) {
- __ Cvtlsi2sd(ToDoubleRegister(output), ToRegister(input));
- } else {
- __ Cvtlsi2sd(ToDoubleRegister(output), ToOperand(input));
- }
-}
-
-
-void LCodeGen::DoUint32ToDouble(LUint32ToDouble* instr) {
- LOperand* input = instr->value();
- LOperand* output = instr->result();
-
- __ LoadUint32(ToDoubleRegister(output), ToRegister(input));
-}
-
-
-void LCodeGen::DoNumberTagI(LNumberTagI* instr) {
- class DeferredNumberTagI final : public LDeferredCode {
- public:
- DeferredNumberTagI(LCodeGen* codegen, LNumberTagI* instr)
- : LDeferredCode(codegen), instr_(instr) { }
- void Generate() override {
- codegen()->DoDeferredNumberTagIU(instr_, instr_->value(), instr_->temp1(),
- instr_->temp2(), SIGNED_INT32);
- }
- LInstruction* instr() override { return instr_; }
-
- private:
- LNumberTagI* instr_;
- };
-
- LOperand* input = instr->value();
- DCHECK(input->IsRegister() && input->Equals(instr->result()));
- Register reg = ToRegister(input);
-
- if (SmiValuesAre32Bits()) {
- __ Integer32ToSmi(reg, reg);
- } else {
- DCHECK(SmiValuesAre31Bits());
- DeferredNumberTagI* deferred = new(zone()) DeferredNumberTagI(this, instr);
- __ Integer32ToSmi(reg, reg);
- __ j(overflow, deferred->entry());
- __ bind(deferred->exit());
- }
-}
-
-
-void LCodeGen::DoNumberTagU(LNumberTagU* instr) {
- class DeferredNumberTagU final : public LDeferredCode {
- public:
- DeferredNumberTagU(LCodeGen* codegen, LNumberTagU* instr)
- : LDeferredCode(codegen), instr_(instr) { }
- void Generate() override {
- codegen()->DoDeferredNumberTagIU(instr_, instr_->value(), instr_->temp1(),
- instr_->temp2(), UNSIGNED_INT32);
- }
- LInstruction* instr() override { return instr_; }
-
- private:
- LNumberTagU* instr_;
- };
-
- LOperand* input = instr->value();
- DCHECK(input->IsRegister() && input->Equals(instr->result()));
- Register reg = ToRegister(input);
-
- DeferredNumberTagU* deferred = new(zone()) DeferredNumberTagU(this, instr);
- __ cmpl(reg, Immediate(Smi::kMaxValue));
- __ j(above, deferred->entry());
- __ Integer32ToSmi(reg, reg);
- __ bind(deferred->exit());
-}
-
-
-void LCodeGen::DoDeferredNumberTagIU(LInstruction* instr,
- LOperand* value,
- LOperand* temp1,
- LOperand* temp2,
- IntegerSignedness signedness) {
- Label done, slow;
- Register reg = ToRegister(value);
- Register tmp = ToRegister(temp1);
- XMMRegister temp_xmm = ToDoubleRegister(temp2);
-
- // Load value into temp_xmm which will be preserved across potential call to
- // runtime (MacroAssembler::EnterExitFrameEpilogue preserves only allocatable
- // XMM registers on x64).
- if (signedness == SIGNED_INT32) {
- DCHECK(SmiValuesAre31Bits());
- // There was overflow, so bits 30 and 31 of the original integer
- // disagree. Try to allocate a heap number in new space and store
- // the value in there. If that fails, call the runtime system.
- __ SmiToInteger32(reg, reg);
- __ xorl(reg, Immediate(0x80000000));
- __ Cvtlsi2sd(temp_xmm, reg);
- } else {
- DCHECK(signedness == UNSIGNED_INT32);
- __ LoadUint32(temp_xmm, reg);
- }
-
- if (FLAG_inline_new) {
- __ AllocateHeapNumber(reg, tmp, &slow);
- __ jmp(&done, kPointerSize == kInt64Size ? Label::kNear : Label::kFar);
- }
-
- // Slow case: Call the runtime system to do the number allocation.
- __ bind(&slow);
- {
- // Put a valid pointer value in the stack slot where the result
- // register is stored, as this register is in the pointer map, but contains
- // an integer value.
- __ Set(reg, 0);
-
- // Preserve the value of all registers.
- PushSafepointRegistersScope scope(this);
-
- // NumberTagIU uses the context from the frame, rather than
- // the environment's HContext or HInlinedContext value.
- // They only call Runtime::kAllocateHeapNumber.
- // The corresponding HChange instructions are added in a phase that does
- // not have easy access to the local context.
- __ movp(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
- __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber);
- RecordSafepointWithRegisters(
- instr->pointer_map(), 0, Safepoint::kNoLazyDeopt);
- __ StoreToSafepointRegisterSlot(reg, rax);
- }
-
- // Done. Put the value in temp_xmm into the value of the allocated heap
- // number.
- __ bind(&done);
- __ Movsd(FieldOperand(reg, HeapNumber::kValueOffset), temp_xmm);
-}
-
-
-void LCodeGen::DoNumberTagD(LNumberTagD* instr) {
- class DeferredNumberTagD final : public LDeferredCode {
- public:
- DeferredNumberTagD(LCodeGen* codegen, LNumberTagD* instr)
- : LDeferredCode(codegen), instr_(instr) { }
- void Generate() override { codegen()->DoDeferredNumberTagD(instr_); }
- LInstruction* instr() override { return instr_; }
-
- private:
- LNumberTagD* instr_;
- };
-
- XMMRegister input_reg = ToDoubleRegister(instr->value());
- Register reg = ToRegister(instr->result());
- Register tmp = ToRegister(instr->temp());
-
- DeferredNumberTagD* deferred = new(zone()) DeferredNumberTagD(this, instr);
- if (FLAG_inline_new) {
- __ AllocateHeapNumber(reg, tmp, deferred->entry());
- } else {
- __ jmp(deferred->entry());
- }
- __ bind(deferred->exit());
- __ Movsd(FieldOperand(reg, HeapNumber::kValueOffset), input_reg);
-}
-
-
-void LCodeGen::DoDeferredNumberTagD(LNumberTagD* instr) {
- // TODO(3095996): Get rid of this. For now, we need to make the
- // result register contain a valid pointer because it is already
- // contained in the register pointer map.
- Register reg = ToRegister(instr->result());
- __ Move(reg, Smi::FromInt(0));
-
- {
- PushSafepointRegistersScope scope(this);
- // NumberTagD uses the context from the frame, rather than
- // the environment's HContext or HInlinedContext value.
- // They only call Runtime::kAllocateHeapNumber.
- // The corresponding HChange instructions are added in a phase that does
- // not have easy access to the local context.
- __ movp(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
- __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber);
- RecordSafepointWithRegisters(
- instr->pointer_map(), 0, Safepoint::kNoLazyDeopt);
- __ movp(kScratchRegister, rax);
- }
- __ movp(reg, kScratchRegister);
-}
-
-
-void LCodeGen::DoSmiTag(LSmiTag* instr) {
- HChange* hchange = instr->hydrogen();
- Register input = ToRegister(instr->value());
- Register output = ToRegister(instr->result());
- if (hchange->CheckFlag(HValue::kCanOverflow) &&
- hchange->value()->CheckFlag(HValue::kUint32)) {
- Condition is_smi = __ CheckUInteger32ValidSmiValue(input);
- DeoptimizeIf(NegateCondition(is_smi), instr, Deoptimizer::kOverflow);
- }
- __ Integer32ToSmi(output, input);
- if (hchange->CheckFlag(HValue::kCanOverflow) &&
- !hchange->value()->CheckFlag(HValue::kUint32)) {
- DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow);
- }
-}
-
-
-void LCodeGen::DoSmiUntag(LSmiUntag* instr) {
- DCHECK(instr->value()->Equals(instr->result()));
- Register input = ToRegister(instr->value());
- if (instr->needs_check()) {
- Condition is_smi = __ CheckSmi(input);
- DeoptimizeIf(NegateCondition(is_smi), instr, Deoptimizer::kNotASmi);
- } else {
- __ AssertSmi(input);
- }
- __ SmiToInteger32(input, input);
-}
-
-
-void LCodeGen::EmitNumberUntagD(LNumberUntagD* instr, Register input_reg,
- XMMRegister result_reg, NumberUntagDMode mode) {
- bool can_convert_undefined_to_nan =
- instr->hydrogen()->can_convert_undefined_to_nan();
- bool deoptimize_on_minus_zero = instr->hydrogen()->deoptimize_on_minus_zero();
-
- Label convert, load_smi, done;
-
- if (mode == NUMBER_CANDIDATE_IS_ANY_TAGGED) {
- // Smi check.
- __ JumpIfSmi(input_reg, &load_smi, Label::kNear);
-
- // Heap number map check.
- __ CompareRoot(FieldOperand(input_reg, HeapObject::kMapOffset),
- Heap::kHeapNumberMapRootIndex);
-
- // On x64 it is safe to load at heap number offset before evaluating the map
- // check, since all heap objects are at least two words long.
- __ Movsd(result_reg, FieldOperand(input_reg, HeapNumber::kValueOffset));
-
- if (can_convert_undefined_to_nan) {
- __ j(not_equal, &convert, Label::kNear);
- } else {
- DeoptimizeIf(not_equal, instr, Deoptimizer::kNotAHeapNumber);
- }
-
- if (deoptimize_on_minus_zero) {
- XMMRegister xmm_scratch = double_scratch0();
- __ Xorpd(xmm_scratch, xmm_scratch);
- __ Ucomisd(xmm_scratch, result_reg);
- __ j(not_equal, &done, Label::kNear);
- __ Movmskpd(kScratchRegister, result_reg);
- __ testl(kScratchRegister, Immediate(1));
- DeoptimizeIf(not_zero, instr, Deoptimizer::kMinusZero);
- }
- __ jmp(&done, Label::kNear);
-
- if (can_convert_undefined_to_nan) {
- __ bind(&convert);
-
- // Convert undefined (and hole) to NaN. Compute NaN as 0/0.
- __ CompareRoot(input_reg, Heap::kUndefinedValueRootIndex);
- DeoptimizeIf(not_equal, instr, Deoptimizer::kNotAHeapNumberUndefined);
-
- __ pcmpeqd(result_reg, result_reg);
- __ jmp(&done, Label::kNear);
- }
- } else {
- DCHECK(mode == NUMBER_CANDIDATE_IS_SMI);
- }
-
- // Smi to XMM conversion
- __ bind(&load_smi);
- __ SmiToInteger32(kScratchRegister, input_reg);
- __ Cvtlsi2sd(result_reg, kScratchRegister);
- __ bind(&done);
-}
-
-
-void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr, Label* done) {
- Register input_reg = ToRegister(instr->value());
-
- if (instr->truncating()) {
- Label no_heap_number, check_bools, check_false;
-
- // Heap number map check.
- __ CompareRoot(FieldOperand(input_reg, HeapObject::kMapOffset),
- Heap::kHeapNumberMapRootIndex);
- __ j(not_equal, &no_heap_number, Label::kNear);
- __ TruncateHeapNumberToI(input_reg, input_reg);
- __ jmp(done);
-
- __ bind(&no_heap_number);
- // Check for Oddballs. Undefined/False is converted to zero and True to one
- // for truncating conversions.
- __ CompareRoot(input_reg, Heap::kUndefinedValueRootIndex);
- __ j(not_equal, &check_bools, Label::kNear);
- __ Set(input_reg, 0);
- __ jmp(done);
-
- __ bind(&check_bools);
- __ CompareRoot(input_reg, Heap::kTrueValueRootIndex);
- __ j(not_equal, &check_false, Label::kNear);
- __ Set(input_reg, 1);
- __ jmp(done);
-
- __ bind(&check_false);
- __ CompareRoot(input_reg, Heap::kFalseValueRootIndex);
- DeoptimizeIf(not_equal, instr,
- Deoptimizer::kNotAHeapNumberUndefinedBoolean);
- __ Set(input_reg, 0);
- } else {
- XMMRegister scratch = ToDoubleRegister(instr->temp());
- DCHECK(!scratch.is(xmm0));
- __ CompareRoot(FieldOperand(input_reg, HeapObject::kMapOffset),
- Heap::kHeapNumberMapRootIndex);
- DeoptimizeIf(not_equal, instr, Deoptimizer::kNotAHeapNumber);
- __ Movsd(xmm0, FieldOperand(input_reg, HeapNumber::kValueOffset));
- __ Cvttsd2si(input_reg, xmm0);
- __ Cvtlsi2sd(scratch, input_reg);
- __ Ucomisd(xmm0, scratch);
- DeoptimizeIf(not_equal, instr, Deoptimizer::kLostPrecision);
- DeoptimizeIf(parity_even, instr, Deoptimizer::kNaN);
- if (instr->hydrogen()->GetMinusZeroMode() == FAIL_ON_MINUS_ZERO) {
- __ testl(input_reg, input_reg);
- __ j(not_zero, done);
- __ Movmskpd(input_reg, xmm0);
- __ andl(input_reg, Immediate(1));
- DeoptimizeIf(not_zero, instr, Deoptimizer::kMinusZero);
- }
- }
-}
-
-
-void LCodeGen::DoTaggedToI(LTaggedToI* instr) {
- class DeferredTaggedToI final : public LDeferredCode {
- public:
- DeferredTaggedToI(LCodeGen* codegen, LTaggedToI* instr)
- : LDeferredCode(codegen), instr_(instr) { }
- void Generate() override { codegen()->DoDeferredTaggedToI(instr_, done()); }
- LInstruction* instr() override { return instr_; }
-
- private:
- LTaggedToI* instr_;
- };
-
- LOperand* input = instr->value();
- DCHECK(input->IsRegister());
- DCHECK(input->Equals(instr->result()));
- Register input_reg = ToRegister(input);
-
- if (instr->hydrogen()->value()->representation().IsSmi()) {
- __ SmiToInteger32(input_reg, input_reg);
- } else {
- DeferredTaggedToI* deferred = new(zone()) DeferredTaggedToI(this, instr);
- __ JumpIfNotSmi(input_reg, deferred->entry());
- __ SmiToInteger32(input_reg, input_reg);
- __ bind(deferred->exit());
- }
-}
-
-
-void LCodeGen::DoNumberUntagD(LNumberUntagD* instr) {
- LOperand* input = instr->value();
- DCHECK(input->IsRegister());
- LOperand* result = instr->result();
- DCHECK(result->IsDoubleRegister());
-
- Register input_reg = ToRegister(input);
- XMMRegister result_reg = ToDoubleRegister(result);
-
- HValue* value = instr->hydrogen()->value();
- NumberUntagDMode mode = value->representation().IsSmi()
- ? NUMBER_CANDIDATE_IS_SMI : NUMBER_CANDIDATE_IS_ANY_TAGGED;
-
- EmitNumberUntagD(instr, input_reg, result_reg, mode);
-}
-
-
-void LCodeGen::DoDoubleToI(LDoubleToI* instr) {
- LOperand* input = instr->value();
- DCHECK(input->IsDoubleRegister());
- LOperand* result = instr->result();
- DCHECK(result->IsRegister());
-
- XMMRegister input_reg = ToDoubleRegister(input);
- Register result_reg = ToRegister(result);
-
- if (instr->truncating()) {
- __ TruncateDoubleToI(result_reg, input_reg);
- } else {
- Label lost_precision, is_nan, minus_zero, done;
- XMMRegister xmm_scratch = double_scratch0();
- Label::Distance dist = DeoptEveryNTimes() ? Label::kFar : Label::kNear;
- __ DoubleToI(result_reg, input_reg, xmm_scratch,
- instr->hydrogen()->GetMinusZeroMode(), &lost_precision,
- &is_nan, &minus_zero, dist);
- __ jmp(&done, dist);
- __ bind(&lost_precision);
- DeoptimizeIf(no_condition, instr, Deoptimizer::kLostPrecision);
- __ bind(&is_nan);
- DeoptimizeIf(no_condition, instr, Deoptimizer::kNaN);
- __ bind(&minus_zero);
- DeoptimizeIf(no_condition, instr, Deoptimizer::kMinusZero);
- __ bind(&done);
- }
-}
-
-
-void LCodeGen::DoDoubleToSmi(LDoubleToSmi* instr) {
- LOperand* input = instr->value();
- DCHECK(input->IsDoubleRegister());
- LOperand* result = instr->result();
- DCHECK(result->IsRegister());
-
- XMMRegister input_reg = ToDoubleRegister(input);
- Register result_reg = ToRegister(result);
-
- Label lost_precision, is_nan, minus_zero, done;
- XMMRegister xmm_scratch = double_scratch0();
- Label::Distance dist = DeoptEveryNTimes() ? Label::kFar : Label::kNear;
- __ DoubleToI(result_reg, input_reg, xmm_scratch,
- instr->hydrogen()->GetMinusZeroMode(), &lost_precision, &is_nan,
- &minus_zero, dist);
- __ jmp(&done, dist);
- __ bind(&lost_precision);
- DeoptimizeIf(no_condition, instr, Deoptimizer::kLostPrecision);
- __ bind(&is_nan);
- DeoptimizeIf(no_condition, instr, Deoptimizer::kNaN);
- __ bind(&minus_zero);
- DeoptimizeIf(no_condition, instr, Deoptimizer::kMinusZero);
- __ bind(&done);
- __ Integer32ToSmi(result_reg, result_reg);
- DeoptimizeIf(overflow, instr, Deoptimizer::kOverflow);
-}
-
-
-void LCodeGen::DoCheckSmi(LCheckSmi* instr) {
- LOperand* input = instr->value();
- Condition cc = masm()->CheckSmi(ToRegister(input));
- DeoptimizeIf(NegateCondition(cc), instr, Deoptimizer::kNotASmi);
-}
-
-
-void LCodeGen::DoCheckNonSmi(LCheckNonSmi* instr) {
- if (!instr->hydrogen()->value()->type().IsHeapObject()) {
- LOperand* input = instr->value();
- Condition cc = masm()->CheckSmi(ToRegister(input));
- DeoptimizeIf(cc, instr, Deoptimizer::kSmi);
- }
-}
-
-
-void LCodeGen::DoCheckArrayBufferNotNeutered(
- LCheckArrayBufferNotNeutered* instr) {
- Register view = ToRegister(instr->view());
-
- __ movp(kScratchRegister,
- FieldOperand(view, JSArrayBufferView::kBufferOffset));
- __ testb(FieldOperand(kScratchRegister, JSArrayBuffer::kBitFieldOffset),
- Immediate(1 << JSArrayBuffer::WasNeutered::kShift));
- DeoptimizeIf(not_zero, instr, Deoptimizer::kOutOfBounds);
-}
-
-
-void LCodeGen::DoCheckInstanceType(LCheckInstanceType* instr) {
- Register input = ToRegister(instr->value());
-
- __ movp(kScratchRegister, FieldOperand(input, HeapObject::kMapOffset));
-
- if (instr->hydrogen()->is_interval_check()) {
- InstanceType first;
- InstanceType last;
- instr->hydrogen()->GetCheckInterval(&first, &last);
-
- __ cmpb(FieldOperand(kScratchRegister, Map::kInstanceTypeOffset),
- Immediate(static_cast<int8_t>(first)));
-
- // If there is only one type in the interval check for equality.
- if (first == last) {
- DeoptimizeIf(not_equal, instr, Deoptimizer::kWrongInstanceType);
- } else {
- DeoptimizeIf(below, instr, Deoptimizer::kWrongInstanceType);
- // Omit check for the last type.
- if (last != LAST_TYPE) {
- __ cmpb(FieldOperand(kScratchRegister, Map::kInstanceTypeOffset),
- Immediate(static_cast<int8_t>(last)));
- DeoptimizeIf(above, instr, Deoptimizer::kWrongInstanceType);
- }
- }
- } else {
- uint8_t mask;
- uint8_t tag;
- instr->hydrogen()->GetCheckMaskAndTag(&mask, &tag);
-
- if (base::bits::IsPowerOfTwo32(mask)) {
- DCHECK(tag == 0 || base::bits::IsPowerOfTwo32(tag));
- __ testb(FieldOperand(kScratchRegister, Map::kInstanceTypeOffset),
- Immediate(mask));
- DeoptimizeIf(tag == 0 ? not_zero : zero, instr,
- Deoptimizer::kWrongInstanceType);
- } else {
- __ movzxbl(kScratchRegister,
- FieldOperand(kScratchRegister, Map::kInstanceTypeOffset));
- __ andb(kScratchRegister, Immediate(mask));
- __ cmpb(kScratchRegister, Immediate(tag));
- DeoptimizeIf(not_equal, instr, Deoptimizer::kWrongInstanceType);
- }
- }
-}
-
-
-void LCodeGen::DoCheckValue(LCheckValue* instr) {
- Register reg = ToRegister(instr->value());
- __ Cmp(reg, instr->hydrogen()->object().handle());
- DeoptimizeIf(not_equal, instr, Deoptimizer::kValueMismatch);
-}
-
-
-void LCodeGen::DoDeferredInstanceMigration(LCheckMaps* instr, Register object) {
- {
- PushSafepointRegistersScope scope(this);
- __ Push(object);
- __ Set(rsi, 0);
- __ CallRuntimeSaveDoubles(Runtime::kTryMigrateInstance);
- RecordSafepointWithRegisters(
- instr->pointer_map(), 1, Safepoint::kNoLazyDeopt);
-
- __ testp(rax, Immediate(kSmiTagMask));
- }
- DeoptimizeIf(zero, instr, Deoptimizer::kInstanceMigrationFailed);
-}
-
-
-void LCodeGen::DoCheckMaps(LCheckMaps* instr) {
- class DeferredCheckMaps final : public LDeferredCode {
- public:
- DeferredCheckMaps(LCodeGen* codegen, LCheckMaps* instr, Register object)
- : LDeferredCode(codegen), instr_(instr), object_(object) {
- SetExit(check_maps());
- }
- void Generate() override {
- codegen()->DoDeferredInstanceMigration(instr_, object_);
- }
- Label* check_maps() { return &check_maps_; }
- LInstruction* instr() override { return instr_; }
-
- private:
- LCheckMaps* instr_;
- Label check_maps_;
- Register object_;
- };
-
- if (instr->hydrogen()->IsStabilityCheck()) {
- const UniqueSet<Map>* maps = instr->hydrogen()->maps();
- for (int i = 0; i < maps->size(); ++i) {
- AddStabilityDependency(maps->at(i).handle());
- }
- return;
- }
-
- LOperand* input = instr->value();
- DCHECK(input->IsRegister());
- Register reg = ToRegister(input);
-
- DeferredCheckMaps* deferred = NULL;
- if (instr->hydrogen()->HasMigrationTarget()) {
- deferred = new(zone()) DeferredCheckMaps(this, instr, reg);
- __ bind(deferred->check_maps());
- }
-
- const UniqueSet<Map>* maps = instr->hydrogen()->maps();
- Label success;
- for (int i = 0; i < maps->size() - 1; i++) {
- Handle<Map> map = maps->at(i).handle();
- __ CompareMap(reg, map);
- __ j(equal, &success, Label::kNear);
- }
-
- Handle<Map> map = maps->at(maps->size() - 1).handle();
- __ CompareMap(reg, map);
- if (instr->hydrogen()->HasMigrationTarget()) {
- __ j(not_equal, deferred->entry());
- } else {
- DeoptimizeIf(not_equal, instr, Deoptimizer::kWrongMap);
- }
-
- __ bind(&success);
-}
-
-
-void LCodeGen::DoClampDToUint8(LClampDToUint8* instr) {
- XMMRegister value_reg = ToDoubleRegister(instr->unclamped());
- XMMRegister xmm_scratch = double_scratch0();
- Register result_reg = ToRegister(instr->result());
- __ ClampDoubleToUint8(value_reg, xmm_scratch, result_reg);
-}
-
-
-void LCodeGen::DoClampIToUint8(LClampIToUint8* instr) {
- DCHECK(instr->unclamped()->Equals(instr->result()));
- Register value_reg = ToRegister(instr->result());
- __ ClampUint8(value_reg);
-}
-
-
-void LCodeGen::DoClampTToUint8(LClampTToUint8* instr) {
- DCHECK(instr->unclamped()->Equals(instr->result()));
- Register input_reg = ToRegister(instr->unclamped());
- XMMRegister temp_xmm_reg = ToDoubleRegister(instr->temp_xmm());
- XMMRegister xmm_scratch = double_scratch0();
- Label is_smi, done, heap_number;
- Label::Distance dist = DeoptEveryNTimes() ? Label::kFar : Label::kNear;
- __ JumpIfSmi(input_reg, &is_smi, dist);
-
- // Check for heap number
- __ Cmp(FieldOperand(input_reg, HeapObject::kMapOffset),
- factory()->heap_number_map());
- __ j(equal, &heap_number, Label::kNear);
-
- // Check for undefined. Undefined is converted to zero for clamping
- // conversions.
- __ Cmp(input_reg, factory()->undefined_value());
- DeoptimizeIf(not_equal, instr, Deoptimizer::kNotAHeapNumberUndefined);
- __ xorl(input_reg, input_reg);
- __ jmp(&done, Label::kNear);
-
- // Heap number
- __ bind(&heap_number);
- __ Movsd(xmm_scratch, FieldOperand(input_reg, HeapNumber::kValueOffset));
- __ ClampDoubleToUint8(xmm_scratch, temp_xmm_reg, input_reg);
- __ jmp(&done, Label::kNear);
-
- // smi
- __ bind(&is_smi);
- __ SmiToInteger32(input_reg, input_reg);
- __ ClampUint8(input_reg);
-
- __ bind(&done);
-}
-
-
-void LCodeGen::DoDoubleBits(LDoubleBits* instr) {
- XMMRegister value_reg = ToDoubleRegister(instr->value());
- Register result_reg = ToRegister(instr->result());
- if (instr->hydrogen()->bits() == HDoubleBits::HIGH) {
- __ Movq(result_reg, value_reg);
- __ shrq(result_reg, Immediate(32));
- } else {
- __ Movd(result_reg, value_reg);
- }
-}
-
-
-void LCodeGen::DoConstructDouble(LConstructDouble* instr) {
- Register hi_reg = ToRegister(instr->hi());
- Register lo_reg = ToRegister(instr->lo());
- XMMRegister result_reg = ToDoubleRegister(instr->result());
- __ movl(kScratchRegister, hi_reg);
- __ shlq(kScratchRegister, Immediate(32));
- __ orq(kScratchRegister, lo_reg);
- __ Movq(result_reg, kScratchRegister);
-}
-
-
-void LCodeGen::DoAllocate(LAllocate* instr) {
- class DeferredAllocate final : public LDeferredCode {
- public:
- DeferredAllocate(LCodeGen* codegen, LAllocate* instr)
- : LDeferredCode(codegen), instr_(instr) { }
- void Generate() override { codegen()->DoDeferredAllocate(instr_); }
- LInstruction* instr() override { return instr_; }
-
- private:
- LAllocate* instr_;
- };
-
- DeferredAllocate* deferred =
- new(zone()) DeferredAllocate(this, instr);
-
- Register result = ToRegister(instr->result());
- Register temp = ToRegister(instr->temp());
-
- // Allocate memory for the object.
- AllocationFlags flags = TAG_OBJECT;
- if (instr->hydrogen()->MustAllocateDoubleAligned()) {
- flags = static_cast<AllocationFlags>(flags | DOUBLE_ALIGNMENT);
- }
- if (instr->hydrogen()->IsOldSpaceAllocation()) {
- DCHECK(!instr->hydrogen()->IsNewSpaceAllocation());
- flags = static_cast<AllocationFlags>(flags | PRETENURE);
- }
-
- if (instr->size()->IsConstantOperand()) {
- int32_t size = ToInteger32(LConstantOperand::cast(instr->size()));
- CHECK(size <= Page::kMaxRegularHeapObjectSize);
- __ Allocate(size, result, temp, no_reg, deferred->entry(), flags);
- } else {
- Register size = ToRegister(instr->size());
- __ Allocate(size, result, temp, no_reg, deferred->entry(), flags);
- }
-
- __ bind(deferred->exit());
-
- if (instr->hydrogen()->MustPrefillWithFiller()) {
- if (instr->size()->IsConstantOperand()) {
- int32_t size = ToInteger32(LConstantOperand::cast(instr->size()));
- __ movl(temp, Immediate((size / kPointerSize) - 1));
- } else {
- temp = ToRegister(instr->size());
- __ sarp(temp, Immediate(kPointerSizeLog2));
- __ decl(temp);
- }
- Label loop;
- __ bind(&loop);
- __ Move(FieldOperand(result, temp, times_pointer_size, 0),
- isolate()->factory()->one_pointer_filler_map());
- __ decl(temp);
- __ j(not_zero, &loop);
- }
-}
-
-
-void LCodeGen::DoDeferredAllocate(LAllocate* instr) {
- Register result = ToRegister(instr->result());
-
- // TODO(3095996): Get rid of this. For now, we need to make the
- // result register contain a valid pointer because it is already
- // contained in the register pointer map.
- __ Move(result, Smi::FromInt(0));
-
- PushSafepointRegistersScope scope(this);
- if (instr->size()->IsRegister()) {
- Register size = ToRegister(instr->size());
- DCHECK(!size.is(result));
- __ Integer32ToSmi(size, size);
- __ Push(size);
- } else {
- int32_t size = ToInteger32(LConstantOperand::cast(instr->size()));
- __ Push(Smi::FromInt(size));
- }
-
- int flags = 0;
- if (instr->hydrogen()->IsOldSpaceAllocation()) {
- DCHECK(!instr->hydrogen()->IsNewSpaceAllocation());
- flags = AllocateTargetSpace::update(flags, OLD_SPACE);
- } else {
- flags = AllocateTargetSpace::update(flags, NEW_SPACE);
- }
- __ Push(Smi::FromInt(flags));
-
- CallRuntimeFromDeferred(
- Runtime::kAllocateInTargetSpace, 2, instr, instr->context());
- __ StoreToSafepointRegisterSlot(result, rax);
-}
-
-
-void LCodeGen::DoToFastProperties(LToFastProperties* instr) {
- DCHECK(ToRegister(instr->value()).is(rax));
- __ Push(rax);
- CallRuntime(Runtime::kToFastProperties, 1, instr);
-}
-
-
-void LCodeGen::DoRegExpLiteral(LRegExpLiteral* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- Label materialized;
- // Registers will be used as follows:
- // rcx = literals array.
- // rbx = regexp literal.
- // rax = regexp literal clone.
- int literal_offset =
- LiteralsArray::OffsetOfLiteralAt(instr->hydrogen()->literal_index());
- __ Move(rcx, instr->hydrogen()->literals());
- __ movp(rbx, FieldOperand(rcx, literal_offset));
- __ CompareRoot(rbx, Heap::kUndefinedValueRootIndex);
- __ j(not_equal, &materialized, Label::kNear);
-
- // Create regexp literal using runtime function
- // Result will be in rax.
- __ Push(rcx);
- __ Push(Smi::FromInt(instr->hydrogen()->literal_index()));
- __ Push(instr->hydrogen()->pattern());
- __ Push(instr->hydrogen()->flags());
- CallRuntime(Runtime::kMaterializeRegExpLiteral, 4, instr);
- __ movp(rbx, rax);
-
- __ bind(&materialized);
- int size = JSRegExp::kSize + JSRegExp::kInObjectFieldCount * kPointerSize;
- Label allocated, runtime_allocate;
- __ Allocate(size, rax, rcx, rdx, &runtime_allocate, TAG_OBJECT);
- __ jmp(&allocated, Label::kNear);
-
- __ bind(&runtime_allocate);
- __ Push(rbx);
- __ Push(Smi::FromInt(size));
- CallRuntime(Runtime::kAllocateInNewSpace, 1, instr);
- __ Pop(rbx);
-
- __ bind(&allocated);
- // Copy the content into the newly allocated memory.
- // (Unroll copy loop once for better throughput).
- for (int i = 0; i < size - kPointerSize; i += 2 * kPointerSize) {
- __ movp(rdx, FieldOperand(rbx, i));
- __ movp(rcx, FieldOperand(rbx, i + kPointerSize));
- __ movp(FieldOperand(rax, i), rdx);
- __ movp(FieldOperand(rax, i + kPointerSize), rcx);
- }
- if ((size % (2 * kPointerSize)) != 0) {
- __ movp(rdx, FieldOperand(rbx, size - kPointerSize));
- __ movp(FieldOperand(rax, size - kPointerSize), rdx);
- }
-}
-
-
-void LCodeGen::DoTypeof(LTypeof* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
- DCHECK(ToRegister(instr->value()).is(rbx));
- Label end, do_call;
- Register value_register = ToRegister(instr->value());
- __ JumpIfNotSmi(value_register, &do_call);
- __ Move(rax, isolate()->factory()->number_string());
- __ jmp(&end);
- __ bind(&do_call);
- TypeofStub stub(isolate());
- CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
- __ bind(&end);
-}
-
-
-void LCodeGen::EmitPushTaggedOperand(LOperand* operand) {
- DCHECK(!operand->IsDoubleRegister());
- if (operand->IsConstantOperand()) {
- __ Push(ToHandle(LConstantOperand::cast(operand)));
- } else if (operand->IsRegister()) {
- __ Push(ToRegister(operand));
- } else {
- __ Push(ToOperand(operand));
- }
-}
-
-
-void LCodeGen::DoTypeofIsAndBranch(LTypeofIsAndBranch* instr) {
- Register input = ToRegister(instr->value());
- Condition final_branch_condition = EmitTypeofIs(instr, input);
- if (final_branch_condition != no_condition) {
- EmitBranch(instr, final_branch_condition);
- }
-}
-
-
-Condition LCodeGen::EmitTypeofIs(LTypeofIsAndBranch* instr, Register input) {
- Label* true_label = instr->TrueLabel(chunk_);
- Label* false_label = instr->FalseLabel(chunk_);
- Handle<String> type_name = instr->type_literal();
- int left_block = instr->TrueDestination(chunk_);
- int right_block = instr->FalseDestination(chunk_);
- int next_block = GetNextEmittedBlock();
-
- Label::Distance true_distance = left_block == next_block ? Label::kNear
- : Label::kFar;
- Label::Distance false_distance = right_block == next_block ? Label::kNear
- : Label::kFar;
- Condition final_branch_condition = no_condition;
- Factory* factory = isolate()->factory();
- if (String::Equals(type_name, factory->number_string())) {
- __ JumpIfSmi(input, true_label, true_distance);
- __ CompareRoot(FieldOperand(input, HeapObject::kMapOffset),
- Heap::kHeapNumberMapRootIndex);
-
- final_branch_condition = equal;
-
- } else if (String::Equals(type_name, factory->string_string())) {
- __ JumpIfSmi(input, false_label, false_distance);
- __ CmpObjectType(input, FIRST_NONSTRING_TYPE, input);
- final_branch_condition = below;
-
- } else if (String::Equals(type_name, factory->symbol_string())) {
- __ JumpIfSmi(input, false_label, false_distance);
- __ CmpObjectType(input, SYMBOL_TYPE, input);
- final_branch_condition = equal;
-
- } else if (String::Equals(type_name, factory->boolean_string())) {
- __ CompareRoot(input, Heap::kTrueValueRootIndex);
- __ j(equal, true_label, true_distance);
- __ CompareRoot(input, Heap::kFalseValueRootIndex);
- final_branch_condition = equal;
-
- } else if (String::Equals(type_name, factory->undefined_string())) {
- __ CompareRoot(input, Heap::kUndefinedValueRootIndex);
- __ j(equal, true_label, true_distance);
- __ JumpIfSmi(input, false_label, false_distance);
- // Check for undetectable objects => true.
- __ movp(input, FieldOperand(input, HeapObject::kMapOffset));
- __ testb(FieldOperand(input, Map::kBitFieldOffset),
- Immediate(1 << Map::kIsUndetectable));
- final_branch_condition = not_zero;
-
- } else if (String::Equals(type_name, factory->function_string())) {
- __ JumpIfSmi(input, false_label, false_distance);
- // Check for callable and not undetectable objects => true.
- __ movp(input, FieldOperand(input, HeapObject::kMapOffset));
- __ movzxbl(input, FieldOperand(input, Map::kBitFieldOffset));
- __ andb(input,
- Immediate((1 << Map::kIsCallable) | (1 << Map::kIsUndetectable)));
- __ cmpb(input, Immediate(1 << Map::kIsCallable));
- final_branch_condition = equal;
-
- } else if (String::Equals(type_name, factory->object_string())) {
- __ JumpIfSmi(input, false_label, false_distance);
- __ CompareRoot(input, Heap::kNullValueRootIndex);
- __ j(equal, true_label, true_distance);
- STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE);
- __ CmpObjectType(input, FIRST_SPEC_OBJECT_TYPE, input);
- __ j(below, false_label, false_distance);
- // Check for callable or undetectable objects => false.
- __ testb(FieldOperand(input, Map::kBitFieldOffset),
- Immediate((1 << Map::kIsCallable) | (1 << Map::kIsUndetectable)));
- final_branch_condition = zero;
-
-// clang-format off
-#define SIMD128_TYPE(TYPE, Type, type, lane_count, lane_type) \
- } else if (String::Equals(type_name, factory->type##_string())) { \
- __ JumpIfSmi(input, false_label, false_distance); \
- __ CompareRoot(FieldOperand(input, HeapObject::kMapOffset), \
- Heap::k##Type##MapRootIndex); \
- final_branch_condition = equal;
- SIMD128_TYPES(SIMD128_TYPE)
-#undef SIMD128_TYPE
- // clang-format on
-
- } else {
- __ jmp(false_label, false_distance);
- }
-
- return final_branch_condition;
-}
-
-
-void LCodeGen::DoIsConstructCallAndBranch(LIsConstructCallAndBranch* instr) {
- Register temp = ToRegister(instr->temp());
-
- EmitIsConstructCall(temp);
- EmitBranch(instr, equal);
-}
-
-
-void LCodeGen::EmitIsConstructCall(Register temp) {
- // Get the frame pointer for the calling frame.
- __ movp(temp, Operand(rbp, StandardFrameConstants::kCallerFPOffset));
-
- // Skip the arguments adaptor frame if it exists.
- Label check_frame_marker;
- __ Cmp(Operand(temp, StandardFrameConstants::kContextOffset),
- Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR));
- __ j(not_equal, &check_frame_marker, Label::kNear);
- __ movp(temp, Operand(temp, StandardFrameConstants::kCallerFPOffset));
-
- // Check the marker in the calling frame.
- __ bind(&check_frame_marker);
- __ Cmp(Operand(temp, StandardFrameConstants::kMarkerOffset),
- Smi::FromInt(StackFrame::CONSTRUCT));
-}
-
-
-void LCodeGen::EnsureSpaceForLazyDeopt(int space_needed) {
- if (info()->ShouldEnsureSpaceForLazyDeopt()) {
- // Ensure that we have enough space after the previous lazy-bailout
- // instruction for patching the code here.
- int current_pc = masm()->pc_offset();
- if (current_pc < last_lazy_deopt_pc_ + space_needed) {
- int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc;
- __ Nop(padding_size);
- }
- }
- last_lazy_deopt_pc_ = masm()->pc_offset();
-}
-
-
-void LCodeGen::DoLazyBailout(LLazyBailout* instr) {
- last_lazy_deopt_pc_ = masm()->pc_offset();
- DCHECK(instr->HasEnvironment());
- LEnvironment* env = instr->environment();
- RegisterEnvironmentForDeoptimization(env, Safepoint::kLazyDeopt);
- safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index());
-}
-
-
-void LCodeGen::DoDeoptimize(LDeoptimize* instr) {
- Deoptimizer::BailoutType type = instr->hydrogen()->type();
- // TODO(danno): Stubs expect all deopts to be lazy for historical reasons (the
- // needed return address), even though the implementation of LAZY and EAGER is
- // now identical. When LAZY is eventually completely folded into EAGER, remove
- // the special case below.
- if (info()->IsStub() && type == Deoptimizer::EAGER) {
- type = Deoptimizer::LAZY;
- }
- DeoptimizeIf(no_condition, instr, instr->hydrogen()->reason(), type);
-}
-
-
-void LCodeGen::DoDummy(LDummy* instr) {
- // Nothing to see here, move on!
-}
-
-
-void LCodeGen::DoDummyUse(LDummyUse* instr) {
- // Nothing to see here, move on!
-}
-
-
-void LCodeGen::DoDeferredStackCheck(LStackCheck* instr) {
- PushSafepointRegistersScope scope(this);
- __ movp(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
- __ CallRuntimeSaveDoubles(Runtime::kStackGuard);
- RecordSafepointWithLazyDeopt(instr, RECORD_SAFEPOINT_WITH_REGISTERS, 0);
- DCHECK(instr->HasEnvironment());
- LEnvironment* env = instr->environment();
- safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index());
-}
-
-
-void LCodeGen::DoStackCheck(LStackCheck* instr) {
- class DeferredStackCheck final : public LDeferredCode {
- public:
- DeferredStackCheck(LCodeGen* codegen, LStackCheck* instr)
- : LDeferredCode(codegen), instr_(instr) { }
- void Generate() override { codegen()->DoDeferredStackCheck(instr_); }
- LInstruction* instr() override { return instr_; }
-
- private:
- LStackCheck* instr_;
- };
-
- DCHECK(instr->HasEnvironment());
- LEnvironment* env = instr->environment();
- // There is no LLazyBailout instruction for stack-checks. We have to
- // prepare for lazy deoptimization explicitly here.
- if (instr->hydrogen()->is_function_entry()) {
- // Perform stack overflow check.
- Label done;
- __ CompareRoot(rsp, Heap::kStackLimitRootIndex);
- __ j(above_equal, &done, Label::kNear);
-
- DCHECK(instr->context()->IsRegister());
- DCHECK(ToRegister(instr->context()).is(rsi));
- CallCode(isolate()->builtins()->StackCheck(),
- RelocInfo::CODE_TARGET,
- instr);
- __ bind(&done);
- } else {
- DCHECK(instr->hydrogen()->is_backwards_branch());
- // Perform stack overflow check if this goto needs it before jumping.
- DeferredStackCheck* deferred_stack_check =
- new(zone()) DeferredStackCheck(this, instr);
- __ CompareRoot(rsp, Heap::kStackLimitRootIndex);
- __ j(below, deferred_stack_check->entry());
- EnsureSpaceForLazyDeopt(Deoptimizer::patch_size());
- __ bind(instr->done_label());
- deferred_stack_check->SetExit(instr->done_label());
- RegisterEnvironmentForDeoptimization(env, Safepoint::kLazyDeopt);
- // Don't record a deoptimization index for the safepoint here.
- // This will be done explicitly when emitting call and the safepoint in
- // the deferred code.
- }
-}
-
-
-void LCodeGen::DoOsrEntry(LOsrEntry* instr) {
- // This is a pseudo-instruction that ensures that the environment here is
- // properly registered for deoptimization and records the assembler's PC
- // offset.
- LEnvironment* environment = instr->environment();
-
- // If the environment were already registered, we would have no way of
- // backpatching it with the spill slot operands.
- DCHECK(!environment->HasBeenRegistered());
- RegisterEnvironmentForDeoptimization(environment, Safepoint::kNoLazyDeopt);
-
- GenerateOsrPrologue();
-}
-
-
-void LCodeGen::DoForInPrepareMap(LForInPrepareMap* instr) {
- DCHECK(ToRegister(instr->context()).is(rsi));
-
- Condition cc = masm()->CheckSmi(rax);
- DeoptimizeIf(cc, instr, Deoptimizer::kSmi);
-
- STATIC_ASSERT(FIRST_JS_PROXY_TYPE == FIRST_SPEC_OBJECT_TYPE);
- __ CmpObjectType(rax, LAST_JS_PROXY_TYPE, rcx);
- DeoptimizeIf(below_equal, instr, Deoptimizer::kWrongInstanceType);
-
- Label use_cache, call_runtime;
- Register null_value = rdi;
- __ LoadRoot(null_value, Heap::kNullValueRootIndex);
- __ CheckEnumCache(null_value, &call_runtime);
-
- __ movp(rax, FieldOperand(rax, HeapObject::kMapOffset));
- __ jmp(&use_cache, Label::kNear);
-
- // Get the set of properties to enumerate.
- __ bind(&call_runtime);
- __ Push(rax);
- CallRuntime(Runtime::kGetPropertyNamesFast, 1, instr);
-
- __ CompareRoot(FieldOperand(rax, HeapObject::kMapOffset),
- Heap::kMetaMapRootIndex);
- DeoptimizeIf(not_equal, instr, Deoptimizer::kWrongMap);
- __ bind(&use_cache);
-}
-
-
-void LCodeGen::DoForInCacheArray(LForInCacheArray* instr) {
- Register map = ToRegister(instr->map());
- Register result = ToRegister(instr->result());
- Label load_cache, done;
- __ EnumLength(result, map);
- __ Cmp(result, Smi::FromInt(0));
- __ j(not_equal, &load_cache, Label::kNear);
- __ LoadRoot(result, Heap::kEmptyFixedArrayRootIndex);
- __ jmp(&done, Label::kNear);
- __ bind(&load_cache);
- __ LoadInstanceDescriptors(map, result);
- __ movp(result,
- FieldOperand(result, DescriptorArray::kEnumCacheOffset));
- __ movp(result,
- FieldOperand(result, FixedArray::SizeFor(instr->idx())));
- __ bind(&done);
- Condition cc = masm()->CheckSmi(result);
- DeoptimizeIf(cc, instr, Deoptimizer::kNoCache);
-}
-
-
-void LCodeGen::DoCheckMapValue(LCheckMapValue* instr) {
- Register object = ToRegister(instr->value());
- __ cmpp(ToRegister(instr->map()),
- FieldOperand(object, HeapObject::kMapOffset));
- DeoptimizeIf(not_equal, instr, Deoptimizer::kWrongMap);
-}
-
-
-void LCodeGen::DoDeferredLoadMutableDouble(LLoadFieldByIndex* instr,
- Register object,
- Register index) {
- PushSafepointRegistersScope scope(this);
- __ Push(object);
- __ Push(index);
- __ xorp(rsi, rsi);
- __ CallRuntimeSaveDoubles(Runtime::kLoadMutableDouble);
- RecordSafepointWithRegisters(
- instr->pointer_map(), 2, Safepoint::kNoLazyDeopt);
- __ StoreToSafepointRegisterSlot(object, rax);
-}
-
-
-void LCodeGen::DoLoadFieldByIndex(LLoadFieldByIndex* instr) {
- class DeferredLoadMutableDouble final : public LDeferredCode {
- public:
- DeferredLoadMutableDouble(LCodeGen* codegen,
- LLoadFieldByIndex* instr,
- Register object,
- Register index)
- : LDeferredCode(codegen),
- instr_(instr),
- object_(object),
- index_(index) {
- }
- void Generate() override {
- codegen()->DoDeferredLoadMutableDouble(instr_, object_, index_);
- }
- LInstruction* instr() override { return instr_; }
-
- private:
- LLoadFieldByIndex* instr_;
- Register object_;
- Register index_;
- };
-
- Register object = ToRegister(instr->object());
- Register index = ToRegister(instr->index());
-
- DeferredLoadMutableDouble* deferred;
- deferred = new(zone()) DeferredLoadMutableDouble(this, instr, object, index);
-
- Label out_of_object, done;
- __ Move(kScratchRegister, Smi::FromInt(1));
- __ testp(index, kScratchRegister);
- __ j(not_zero, deferred->entry());
-
- __ sarp(index, Immediate(1));
-
- __ SmiToInteger32(index, index);
- __ cmpl(index, Immediate(0));
- __ j(less, &out_of_object, Label::kNear);
- __ movp(object, FieldOperand(object,
- index,
- times_pointer_size,
- JSObject::kHeaderSize));
- __ jmp(&done, Label::kNear);
-
- __ bind(&out_of_object);
- __ movp(object, FieldOperand(object, JSObject::kPropertiesOffset));
- __ negl(index);
- // Index is now equal to out of object property index plus 1.
- __ movp(object, FieldOperand(object,
- index,
- times_pointer_size,
- FixedArray::kHeaderSize - kPointerSize));
- __ bind(deferred->exit());
- __ bind(&done);
-}
-
-
-void LCodeGen::DoStoreFrameContext(LStoreFrameContext* instr) {
- Register context = ToRegister(instr->context());
- __ movp(Operand(rbp, StandardFrameConstants::kContextOffset), context);
-}
-
-
-void LCodeGen::DoAllocateBlockContext(LAllocateBlockContext* instr) {
- Handle<ScopeInfo> scope_info = instr->scope_info();
- __ Push(scope_info);
- __ Push(ToRegister(instr->function()));
- CallRuntime(Runtime::kPushBlockContext, 2, instr);
- RecordSafepoint(Safepoint::kNoLazyDeopt);
-}
-
-
-#undef __
-
-} // namespace internal
-} // namespace v8
-
-#endif // V8_TARGET_ARCH_X64
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