| // Copyright 2011 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "arm/lithium-codegen-arm.h" |
| #include "arm/lithium-gap-resolver-arm.h" |
| #include "code-stubs.h" |
| #include "stub-cache.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| class SafepointGenerator : public CallWrapper { |
| public: |
| SafepointGenerator(LCodeGen* codegen, |
| LPointerMap* pointers, |
| int deoptimization_index) |
| : codegen_(codegen), |
| pointers_(pointers), |
| deoptimization_index_(deoptimization_index) { } |
| virtual ~SafepointGenerator() { } |
| |
| virtual void BeforeCall(int call_size) { |
| ASSERT(call_size >= 0); |
| // Ensure that we have enough space after the previous safepoint position |
| // for the generated code there. |
| int call_end = codegen_->masm()->pc_offset() + call_size; |
| int prev_jump_end = |
| codegen_->LastSafepointEnd() + Deoptimizer::patch_size(); |
| if (call_end < prev_jump_end) { |
| int padding_size = prev_jump_end - call_end; |
| ASSERT_EQ(0, padding_size % Assembler::kInstrSize); |
| while (padding_size > 0) { |
| codegen_->masm()->nop(); |
| padding_size -= Assembler::kInstrSize; |
| } |
| } |
| } |
| |
| virtual void AfterCall() { |
| codegen_->RecordSafepoint(pointers_, deoptimization_index_); |
| } |
| |
| private: |
| LCodeGen* codegen_; |
| LPointerMap* pointers_; |
| int deoptimization_index_; |
| }; |
| |
| |
| #define __ masm()-> |
| |
| bool LCodeGen::GenerateCode() { |
| HPhase phase("Code generation", chunk()); |
| ASSERT(is_unused()); |
| status_ = GENERATING; |
| CpuFeatures::Scope scope1(VFP3); |
| CpuFeatures::Scope scope2(ARMv7); |
| return GeneratePrologue() && |
| GenerateBody() && |
| GenerateDeferredCode() && |
| GenerateSafepointTable(); |
| } |
| |
| |
| void LCodeGen::FinishCode(Handle<Code> code) { |
| ASSERT(is_done()); |
| code->set_stack_slots(StackSlotCount()); |
| code->set_safepoint_table_offset(safepoints_.GetCodeOffset()); |
| PopulateDeoptimizationData(code); |
| } |
| |
| |
| void LCodeGen::Abort(const char* format, ...) { |
| if (FLAG_trace_bailout) { |
| SmartPointer<char> name(info()->shared_info()->DebugName()->ToCString()); |
| PrintF("Aborting LCodeGen in @\"%s\": ", *name); |
| va_list arguments; |
| va_start(arguments, format); |
| OS::VPrint(format, arguments); |
| va_end(arguments); |
| PrintF("\n"); |
| } |
| status_ = ABORTED; |
| } |
| |
| |
| void LCodeGen::Comment(const char* format, ...) { |
| if (!FLAG_code_comments) return; |
| char buffer[4 * KB]; |
| StringBuilder builder(buffer, ARRAY_SIZE(buffer)); |
| va_list arguments; |
| va_start(arguments, format); |
| builder.AddFormattedList(format, arguments); |
| va_end(arguments); |
| |
| // Copy the string before recording it in the assembler to avoid |
| // issues when the stack allocated buffer goes out of scope. |
| size_t length = builder.position(); |
| Vector<char> copy = Vector<char>::New(length + 1); |
| memcpy(copy.start(), builder.Finalize(), copy.length()); |
| masm()->RecordComment(copy.start()); |
| } |
| |
| |
| bool LCodeGen::GeneratePrologue() { |
| ASSERT(is_generating()); |
| |
| #ifdef DEBUG |
| if (strlen(FLAG_stop_at) > 0 && |
| info_->function()->name()->IsEqualTo(CStrVector(FLAG_stop_at))) { |
| __ stop("stop_at"); |
| } |
| #endif |
| |
| // r1: Callee's JS function. |
| // cp: Callee's context. |
| // fp: Caller's frame pointer. |
| // lr: Caller's pc. |
| |
| __ stm(db_w, sp, r1.bit() | cp.bit() | fp.bit() | lr.bit()); |
| __ add(fp, sp, Operand(2 * kPointerSize)); // Adjust FP to point to saved FP. |
| |
| // Reserve space for the stack slots needed by the code. |
| int slots = StackSlotCount(); |
| if (slots > 0) { |
| if (FLAG_debug_code) { |
| __ mov(r0, Operand(slots)); |
| __ mov(r2, Operand(kSlotsZapValue)); |
| Label loop; |
| __ bind(&loop); |
| __ push(r2); |
| __ sub(r0, r0, Operand(1), SetCC); |
| __ b(ne, &loop); |
| } else { |
| __ sub(sp, sp, Operand(slots * kPointerSize)); |
| } |
| } |
| |
| // Possibly allocate a local context. |
| int heap_slots = scope()->num_heap_slots() - Context::MIN_CONTEXT_SLOTS; |
| if (heap_slots > 0) { |
| Comment(";;; Allocate local context"); |
| // Argument to NewContext is the function, which is in r1. |
| __ push(r1); |
| if (heap_slots <= FastNewContextStub::kMaximumSlots) { |
| FastNewContextStub stub(heap_slots); |
| __ CallStub(&stub); |
| } else { |
| __ CallRuntime(Runtime::kNewContext, 1); |
| } |
| RecordSafepoint(Safepoint::kNoDeoptimizationIndex); |
| // Context is returned in both r0 and cp. It replaces the context |
| // passed to us. It's saved in the stack and kept live in cp. |
| __ str(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| // Copy any necessary parameters into the context. |
| int num_parameters = scope()->num_parameters(); |
| for (int i = 0; i < num_parameters; i++) { |
| Slot* slot = scope()->parameter(i)->AsSlot(); |
| if (slot != NULL && slot->type() == Slot::CONTEXT) { |
| int parameter_offset = StandardFrameConstants::kCallerSPOffset + |
| (num_parameters - 1 - i) * kPointerSize; |
| // Load parameter from stack. |
| __ ldr(r0, MemOperand(fp, parameter_offset)); |
| // Store it in the context. |
| __ mov(r1, Operand(Context::SlotOffset(slot->index()))); |
| __ str(r0, MemOperand(cp, r1)); |
| // Update the write barrier. This clobbers all involved |
| // registers, so we have to use two more registers to avoid |
| // clobbering cp. |
| __ mov(r2, Operand(cp)); |
| __ RecordWrite(r2, Operand(r1), r3, r0); |
| } |
| } |
| Comment(";;; End allocate local context"); |
| } |
| |
| // Trace the call. |
| if (FLAG_trace) { |
| __ CallRuntime(Runtime::kTraceEnter, 0); |
| } |
| return !is_aborted(); |
| } |
| |
| |
| bool LCodeGen::GenerateBody() { |
| ASSERT(is_generating()); |
| bool emit_instructions = true; |
| for (current_instruction_ = 0; |
| !is_aborted() && current_instruction_ < instructions_->length(); |
| current_instruction_++) { |
| LInstruction* instr = instructions_->at(current_instruction_); |
| if (instr->IsLabel()) { |
| LLabel* label = LLabel::cast(instr); |
| emit_instructions = !label->HasReplacement(); |
| } |
| |
| if (emit_instructions) { |
| Comment(";;; @%d: %s.", current_instruction_, instr->Mnemonic()); |
| instr->CompileToNative(this); |
| } |
| } |
| return !is_aborted(); |
| } |
| |
| |
| LInstruction* LCodeGen::GetNextInstruction() { |
| if (current_instruction_ < instructions_->length() - 1) { |
| return instructions_->at(current_instruction_ + 1); |
| } else { |
| return NULL; |
| } |
| } |
| |
| |
| bool LCodeGen::GenerateDeferredCode() { |
| ASSERT(is_generating()); |
| for (int i = 0; !is_aborted() && i < deferred_.length(); i++) { |
| LDeferredCode* code = deferred_[i]; |
| __ bind(code->entry()); |
| code->Generate(); |
| __ jmp(code->exit()); |
| } |
| |
| // Force constant pool emission at the end of deferred code to make |
| // sure that no constant pools are emitted after the official end of |
| // the instruction sequence. |
| masm()->CheckConstPool(true, false); |
| |
| // 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() { |
| ASSERT(is_done()); |
| safepoints_.Emit(masm(), StackSlotCount()); |
| return !is_aborted(); |
| } |
| |
| |
| Register LCodeGen::ToRegister(int index) const { |
| return Register::FromAllocationIndex(index); |
| } |
| |
| |
| DoubleRegister LCodeGen::ToDoubleRegister(int index) const { |
| return DoubleRegister::FromAllocationIndex(index); |
| } |
| |
| |
| Register LCodeGen::ToRegister(LOperand* op) const { |
| ASSERT(op->IsRegister()); |
| return ToRegister(op->index()); |
| } |
| |
| |
| Register LCodeGen::EmitLoadRegister(LOperand* op, Register scratch) { |
| if (op->IsRegister()) { |
| return ToRegister(op->index()); |
| } else if (op->IsConstantOperand()) { |
| __ mov(scratch, ToOperand(op)); |
| return scratch; |
| } else if (op->IsStackSlot() || op->IsArgument()) { |
| __ ldr(scratch, ToMemOperand(op)); |
| return scratch; |
| } |
| UNREACHABLE(); |
| return scratch; |
| } |
| |
| |
| DoubleRegister LCodeGen::ToDoubleRegister(LOperand* op) const { |
| ASSERT(op->IsDoubleRegister()); |
| return ToDoubleRegister(op->index()); |
| } |
| |
| |
| DoubleRegister LCodeGen::EmitLoadDoubleRegister(LOperand* op, |
| SwVfpRegister flt_scratch, |
| DoubleRegister dbl_scratch) { |
| if (op->IsDoubleRegister()) { |
| return ToDoubleRegister(op->index()); |
| } else if (op->IsConstantOperand()) { |
| LConstantOperand* const_op = LConstantOperand::cast(op); |
| Handle<Object> literal = chunk_->LookupLiteral(const_op); |
| Representation r = chunk_->LookupLiteralRepresentation(const_op); |
| if (r.IsInteger32()) { |
| ASSERT(literal->IsNumber()); |
| __ mov(ip, Operand(static_cast<int32_t>(literal->Number()))); |
| __ vmov(flt_scratch, ip); |
| __ vcvt_f64_s32(dbl_scratch, flt_scratch); |
| return dbl_scratch; |
| } else if (r.IsDouble()) { |
| Abort("unsupported double immediate"); |
| } else if (r.IsTagged()) { |
| Abort("unsupported tagged immediate"); |
| } |
| } else if (op->IsStackSlot() || op->IsArgument()) { |
| // TODO(regis): Why is vldr not taking a MemOperand? |
| // __ vldr(dbl_scratch, ToMemOperand(op)); |
| MemOperand mem_op = ToMemOperand(op); |
| __ vldr(dbl_scratch, mem_op.rn(), mem_op.offset()); |
| return dbl_scratch; |
| } |
| UNREACHABLE(); |
| return dbl_scratch; |
| } |
| |
| |
| int LCodeGen::ToInteger32(LConstantOperand* op) const { |
| Handle<Object> value = chunk_->LookupLiteral(op); |
| ASSERT(chunk_->LookupLiteralRepresentation(op).IsInteger32()); |
| ASSERT(static_cast<double>(static_cast<int32_t>(value->Number())) == |
| value->Number()); |
| return static_cast<int32_t>(value->Number()); |
| } |
| |
| |
| Operand LCodeGen::ToOperand(LOperand* op) { |
| if (op->IsConstantOperand()) { |
| LConstantOperand* const_op = LConstantOperand::cast(op); |
| Handle<Object> literal = chunk_->LookupLiteral(const_op); |
| Representation r = chunk_->LookupLiteralRepresentation(const_op); |
| if (r.IsInteger32()) { |
| ASSERT(literal->IsNumber()); |
| return Operand(static_cast<int32_t>(literal->Number())); |
| } else if (r.IsDouble()) { |
| Abort("ToOperand Unsupported double immediate."); |
| } |
| ASSERT(r.IsTagged()); |
| return Operand(literal); |
| } else if (op->IsRegister()) { |
| return Operand(ToRegister(op)); |
| } else if (op->IsDoubleRegister()) { |
| Abort("ToOperand IsDoubleRegister unimplemented"); |
| return Operand(0); |
| } |
| // Stack slots not implemented, use ToMemOperand instead. |
| UNREACHABLE(); |
| return Operand(0); |
| } |
| |
| |
| MemOperand LCodeGen::ToMemOperand(LOperand* op) const { |
| ASSERT(!op->IsRegister()); |
| ASSERT(!op->IsDoubleRegister()); |
| ASSERT(op->IsStackSlot() || op->IsDoubleStackSlot()); |
| int index = op->index(); |
| if (index >= 0) { |
| // Local or spill slot. Skip the frame pointer, function, and |
| // context in the fixed part of the frame. |
| return MemOperand(fp, -(index + 3) * kPointerSize); |
| } else { |
| // Incoming parameter. Skip the return address. |
| return MemOperand(fp, -(index - 1) * kPointerSize); |
| } |
| } |
| |
| |
| MemOperand LCodeGen::ToHighMemOperand(LOperand* op) const { |
| ASSERT(op->IsDoubleStackSlot()); |
| int index = op->index(); |
| if (index >= 0) { |
| // Local or spill slot. Skip the frame pointer, function, context, |
| // and the first word of the double in the fixed part of the frame. |
| return MemOperand(fp, -(index + 3) * kPointerSize + kPointerSize); |
| } else { |
| // Incoming parameter. Skip the return address and the first word of |
| // the double. |
| return MemOperand(fp, -(index - 1) * kPointerSize + kPointerSize); |
| } |
| } |
| |
| |
| 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->values()->length(); |
| // The output frame height does not include the parameters. |
| int height = translation_size - environment->parameter_count(); |
| |
| WriteTranslation(environment->outer(), translation); |
| int closure_id = DefineDeoptimizationLiteral(environment->closure()); |
| translation->BeginFrame(environment->ast_id(), closure_id, height); |
| for (int i = 0; i < translation_size; ++i) { |
| LOperand* value = environment->values()->at(i); |
| // spilled_registers_ and spilled_double_registers_ are either |
| // both NULL or both set. |
| if (environment->spilled_registers() != NULL && value != NULL) { |
| if (value->IsRegister() && |
| environment->spilled_registers()[value->index()] != NULL) { |
| translation->MarkDuplicate(); |
| AddToTranslation(translation, |
| environment->spilled_registers()[value->index()], |
| environment->HasTaggedValueAt(i)); |
| } else if ( |
| value->IsDoubleRegister() && |
| environment->spilled_double_registers()[value->index()] != NULL) { |
| translation->MarkDuplicate(); |
| AddToTranslation( |
| translation, |
| environment->spilled_double_registers()[value->index()], |
| false); |
| } |
| } |
| |
| AddToTranslation(translation, value, environment->HasTaggedValueAt(i)); |
| } |
| } |
| |
| |
| void LCodeGen::AddToTranslation(Translation* translation, |
| LOperand* op, |
| bool is_tagged) { |
| if (op == NULL) { |
| // TODO(twuerthinger): Introduce marker operands to indicate that this value |
| // is not present and must be reconstructed from the deoptimizer. Currently |
| // this is only used for the arguments object. |
| translation->StoreArgumentsObject(); |
| } else if (op->IsStackSlot()) { |
| if (is_tagged) { |
| translation->StoreStackSlot(op->index()); |
| } else { |
| translation->StoreInt32StackSlot(op->index()); |
| } |
| } else if (op->IsDoubleStackSlot()) { |
| translation->StoreDoubleStackSlot(op->index()); |
| } else if (op->IsArgument()) { |
| ASSERT(is_tagged); |
| int src_index = StackSlotCount() + op->index(); |
| translation->StoreStackSlot(src_index); |
| } else if (op->IsRegister()) { |
| Register reg = ToRegister(op); |
| if (is_tagged) { |
| translation->StoreRegister(reg); |
| } else { |
| translation->StoreInt32Register(reg); |
| } |
| } else if (op->IsDoubleRegister()) { |
| DoubleRegister reg = ToDoubleRegister(op); |
| translation->StoreDoubleRegister(reg); |
| } else if (op->IsConstantOperand()) { |
| Handle<Object> literal = chunk()->LookupLiteral(LConstantOperand::cast(op)); |
| int src_index = DefineDeoptimizationLiteral(literal); |
| translation->StoreLiteral(src_index); |
| } else { |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void LCodeGen::CallCode(Handle<Code> code, |
| RelocInfo::Mode mode, |
| LInstruction* instr) { |
| ASSERT(instr != NULL); |
| LPointerMap* pointers = instr->pointer_map(); |
| RecordPosition(pointers->position()); |
| __ Call(code, mode); |
| RegisterLazyDeoptimization(instr); |
| } |
| |
| |
| void LCodeGen::CallRuntime(Runtime::Function* function, |
| int num_arguments, |
| LInstruction* instr) { |
| ASSERT(instr != NULL); |
| LPointerMap* pointers = instr->pointer_map(); |
| ASSERT(pointers != NULL); |
| RecordPosition(pointers->position()); |
| |
| __ CallRuntime(function, num_arguments); |
| RegisterLazyDeoptimization(instr); |
| } |
| |
| |
| void LCodeGen::RegisterLazyDeoptimization(LInstruction* instr) { |
| // Create the environment to bailout to. If the call has side effects |
| // execution has to continue after the call otherwise execution can continue |
| // from a previous bailout point repeating the call. |
| LEnvironment* deoptimization_environment; |
| if (instr->HasDeoptimizationEnvironment()) { |
| deoptimization_environment = instr->deoptimization_environment(); |
| } else { |
| deoptimization_environment = instr->environment(); |
| } |
| |
| RegisterEnvironmentForDeoptimization(deoptimization_environment); |
| RecordSafepoint(instr->pointer_map(), |
| deoptimization_environment->deoptimization_index()); |
| } |
| |
| |
| void LCodeGen::RegisterEnvironmentForDeoptimization(LEnvironment* environment) { |
| 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; |
| for (LEnvironment* e = environment; e != NULL; e = e->outer()) { |
| ++frame_count; |
| } |
| Translation translation(&translations_, frame_count); |
| WriteTranslation(environment, &translation); |
| int deoptimization_index = deoptimizations_.length(); |
| environment->Register(deoptimization_index, translation.index()); |
| deoptimizations_.Add(environment); |
| } |
| } |
| |
| |
| void LCodeGen::DeoptimizeIf(Condition cc, LEnvironment* environment) { |
| RegisterEnvironmentForDeoptimization(environment); |
| ASSERT(environment->HasBeenRegistered()); |
| int id = environment->deoptimization_index(); |
| Address entry = Deoptimizer::GetDeoptimizationEntry(id, Deoptimizer::EAGER); |
| ASSERT(entry != NULL); |
| if (entry == NULL) { |
| Abort("bailout was not prepared"); |
| return; |
| } |
| |
| ASSERT(FLAG_deopt_every_n_times < 2); // Other values not supported on ARM. |
| |
| if (FLAG_deopt_every_n_times == 1 && |
| info_->shared_info()->opt_count() == id) { |
| __ Jump(entry, RelocInfo::RUNTIME_ENTRY); |
| return; |
| } |
| |
| if (cc == al) { |
| if (FLAG_trap_on_deopt) __ stop("trap_on_deopt"); |
| __ Jump(entry, RelocInfo::RUNTIME_ENTRY); |
| } else { |
| if (FLAG_trap_on_deopt) { |
| Label done; |
| __ b(&done, NegateCondition(cc)); |
| __ stop("trap_on_deopt"); |
| __ Jump(entry, RelocInfo::RUNTIME_ENTRY); |
| __ bind(&done); |
| } else { |
| __ Jump(entry, RelocInfo::RUNTIME_ENTRY, cc); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::PopulateDeoptimizationData(Handle<Code> code) { |
| int length = deoptimizations_.length(); |
| if (length == 0) return; |
| ASSERT(FLAG_deopt); |
| Handle<DeoptimizationInputData> data = |
| Factory::NewDeoptimizationInputData(length, TENURED); |
| |
| Handle<ByteArray> translations = translations_.CreateByteArray(); |
| data->SetTranslationByteArray(*translations); |
| data->SetInlinedFunctionCount(Smi::FromInt(inlined_function_count_)); |
| |
| Handle<FixedArray> literals = |
| Factory::NewFixedArray(deoptimization_literals_.length(), TENURED); |
| 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())); |
| 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, Smi::FromInt(env->ast_id())); |
| data->SetTranslationIndex(i, Smi::FromInt(env->translation_index())); |
| data->SetArgumentsStackHeight(i, |
| Smi::FromInt(env->arguments_stack_height())); |
| } |
| code->set_deoptimization_data(*data); |
| } |
| |
| |
| int LCodeGen::DefineDeoptimizationLiteral(Handle<Object> literal) { |
| int result = deoptimization_literals_.length(); |
| for (int i = 0; i < deoptimization_literals_.length(); ++i) { |
| if (deoptimization_literals_[i].is_identical_to(literal)) return i; |
| } |
| deoptimization_literals_.Add(literal); |
| return result; |
| } |
| |
| |
| void LCodeGen::PopulateDeoptimizationLiteralsWithInlinedFunctions() { |
| ASSERT(deoptimization_literals_.length() == 0); |
| |
| const ZoneList<Handle<JSFunction> >* inlined_closures = |
| chunk()->inlined_closures(); |
| |
| for (int i = 0, length = inlined_closures->length(); |
| i < length; |
| i++) { |
| DefineDeoptimizationLiteral(inlined_closures->at(i)); |
| } |
| |
| inlined_function_count_ = deoptimization_literals_.length(); |
| } |
| |
| |
| void LCodeGen::RecordSafepoint( |
| LPointerMap* pointers, |
| Safepoint::Kind kind, |
| int arguments, |
| int deoptimization_index) { |
| const ZoneList<LOperand*>* operands = pointers->operands(); |
| Safepoint safepoint = safepoints_.DefineSafepoint(masm(), |
| kind, arguments, deoptimization_index); |
| for (int i = 0; i < operands->length(); i++) { |
| LOperand* pointer = operands->at(i); |
| if (pointer->IsStackSlot()) { |
| safepoint.DefinePointerSlot(pointer->index()); |
| } else if (pointer->IsRegister() && (kind & Safepoint::kWithRegisters)) { |
| safepoint.DefinePointerRegister(ToRegister(pointer)); |
| } |
| } |
| if (kind & Safepoint::kWithRegisters) { |
| // Register cp always contains a pointer to the context. |
| safepoint.DefinePointerRegister(cp); |
| } |
| } |
| |
| |
| void LCodeGen::RecordSafepoint(LPointerMap* pointers, |
| int deoptimization_index) { |
| RecordSafepoint(pointers, Safepoint::kSimple, 0, deoptimization_index); |
| } |
| |
| |
| void LCodeGen::RecordSafepoint(int deoptimization_index) { |
| LPointerMap empty_pointers(RelocInfo::kNoPosition); |
| RecordSafepoint(&empty_pointers, deoptimization_index); |
| } |
| |
| |
| void LCodeGen::RecordSafepointWithRegisters(LPointerMap* pointers, |
| int arguments, |
| int deoptimization_index) { |
| RecordSafepoint(pointers, Safepoint::kWithRegisters, arguments, |
| deoptimization_index); |
| } |
| |
| |
| void LCodeGen::RecordSafepointWithRegistersAndDoubles( |
| LPointerMap* pointers, |
| int arguments, |
| int deoptimization_index) { |
| RecordSafepoint(pointers, Safepoint::kWithRegistersAndDoubles, arguments, |
| deoptimization_index); |
| } |
| |
| |
| void LCodeGen::RecordPosition(int position) { |
| if (!FLAG_debug_info || position == RelocInfo::kNoPosition) return; |
| masm()->positions_recorder()->RecordPosition(position); |
| } |
| |
| |
| void LCodeGen::DoLabel(LLabel* label) { |
| if (label->is_loop_header()) { |
| Comment(";;; B%d - LOOP entry", label->block_id()); |
| } else { |
| Comment(";;; B%d", label->block_id()); |
| } |
| __ bind(label->label()); |
| current_block_ = label->block_id(); |
| LCodeGen::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); |
| } |
| |
| LInstruction* next = GetNextInstruction(); |
| if (next != NULL && next->IsLazyBailout()) { |
| int pc = masm()->pc_offset(); |
| safepoints_.SetPcAfterGap(pc); |
| } |
| } |
| |
| |
| void LCodeGen::DoParameter(LParameter* instr) { |
| // Nothing to do. |
| } |
| |
| |
| void LCodeGen::DoCallStub(LCallStub* instr) { |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| switch (instr->hydrogen()->major_key()) { |
| case CodeStub::RegExpConstructResult: { |
| RegExpConstructResultStub stub; |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| break; |
| } |
| case CodeStub::RegExpExec: { |
| RegExpExecStub stub; |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| break; |
| } |
| case CodeStub::SubString: { |
| SubStringStub stub; |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| break; |
| } |
| case CodeStub::NumberToString: { |
| NumberToStringStub stub; |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| break; |
| } |
| case CodeStub::StringAdd: { |
| StringAddStub stub(NO_STRING_ADD_FLAGS); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| break; |
| } |
| case CodeStub::StringCompare: { |
| StringCompareStub stub; |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| break; |
| } |
| case CodeStub::TranscendentalCache: { |
| __ ldr(r0, MemOperand(sp, 0)); |
| TranscendentalCacheStub stub(instr->transcendental_type(), |
| TranscendentalCacheStub::TAGGED); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| break; |
| } |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void LCodeGen::DoUnknownOSRValue(LUnknownOSRValue* instr) { |
| // Nothing to do. |
| } |
| |
| |
| void LCodeGen::DoModI(LModI* instr) { |
| if (instr->hydrogen()->HasPowerOf2Divisor()) { |
| Register dividend = ToRegister(instr->InputAt(0)); |
| |
| int32_t divisor = |
| HConstant::cast(instr->hydrogen()->right())->Integer32Value(); |
| |
| if (divisor < 0) divisor = -divisor; |
| |
| Label positive_dividend, done; |
| __ tst(dividend, Operand(dividend)); |
| __ b(pl, &positive_dividend); |
| __ rsb(dividend, dividend, Operand(0)); |
| __ and_(dividend, dividend, Operand(divisor - 1)); |
| __ rsb(dividend, dividend, Operand(0), SetCC); |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| __ b(ne, &done); |
| DeoptimizeIf(al, instr->environment()); |
| } |
| __ bind(&positive_dividend); |
| __ and_(dividend, dividend, Operand(divisor - 1)); |
| __ bind(&done); |
| return; |
| } |
| |
| class DeferredModI: public LDeferredCode { |
| public: |
| DeferredModI(LCodeGen* codegen, LModI* instr) |
| : LDeferredCode(codegen), instr_(instr) { } |
| virtual void Generate() { |
| codegen()->DoDeferredBinaryOpStub(instr_, Token::MOD); |
| } |
| private: |
| LModI* instr_; |
| }; |
| // These registers hold untagged 32 bit values. |
| Register left = ToRegister(instr->InputAt(0)); |
| Register right = ToRegister(instr->InputAt(1)); |
| Register result = ToRegister(instr->result()); |
| Register scratch = scratch0(); |
| |
| Label deoptimize, done; |
| // Check for x % 0. |
| if (instr->hydrogen()->CheckFlag(HValue::kCanBeDivByZero)) { |
| __ tst(right, Operand(right)); |
| __ b(eq, &deoptimize); |
| } |
| |
| // Check for (0 % -x) that will produce negative zero. |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| Label ok; |
| __ tst(left, Operand(left)); |
| __ b(ne, &ok); |
| __ tst(right, Operand(right)); |
| __ b(pl, &ok); |
| __ b(al, &deoptimize); |
| __ bind(&ok); |
| } |
| |
| // Try a few common cases before using the stub. |
| Label call_stub; |
| const int kUnfolds = 3; |
| // Skip if either side is negative. |
| __ cmp(left, Operand(0)); |
| __ cmp(right, Operand(0), NegateCondition(mi)); |
| __ b(mi, &call_stub); |
| // If the right hand side is smaller than the (nonnegative) |
| // left hand side, it is the result. Else try a few subtractions |
| // of the left hand side. |
| __ mov(scratch, left); |
| for (int i = 0; i < kUnfolds; i++) { |
| // Check if the left hand side is less or equal than the |
| // the right hand side. |
| __ cmp(scratch, right); |
| __ mov(result, scratch, LeaveCC, lt); |
| __ b(lt, &done); |
| // If not, reduce the left hand side by the right hand |
| // side and check again. |
| if (i < kUnfolds - 1) __ sub(scratch, scratch, right); |
| } |
| |
| // Check for power of two on the right hand side. |
| __ JumpIfNotPowerOfTwoOrZero(right, scratch, &call_stub); |
| // Perform modulo operation (scratch contains right - 1). |
| __ and_(result, scratch, Operand(left)); |
| __ b(&done); |
| |
| __ bind(&call_stub); |
| // Call the stub. The numbers in r0 and r1 have |
| // to be tagged to Smis. If that is not possible, deoptimize. |
| DeferredModI* deferred = new DeferredModI(this, instr); |
| __ TrySmiTag(left, &deoptimize, scratch); |
| __ TrySmiTag(right, &deoptimize, scratch); |
| |
| __ b(al, deferred->entry()); |
| __ bind(deferred->exit()); |
| |
| // If the result in r0 is a Smi, untag it, else deoptimize. |
| __ JumpIfNotSmi(result, &deoptimize); |
| __ SmiUntag(result); |
| |
| __ b(al, &done); |
| __ bind(&deoptimize); |
| DeoptimizeIf(al, instr->environment()); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoDivI(LDivI* instr) { |
| class DeferredDivI: public LDeferredCode { |
| public: |
| DeferredDivI(LCodeGen* codegen, LDivI* instr) |
| : LDeferredCode(codegen), instr_(instr) { } |
| virtual void Generate() { |
| codegen()->DoDeferredBinaryOpStub(instr_, Token::DIV); |
| } |
| private: |
| LDivI* instr_; |
| }; |
| |
| const Register left = ToRegister(instr->InputAt(0)); |
| const Register right = ToRegister(instr->InputAt(1)); |
| const Register scratch = scratch0(); |
| const Register result = ToRegister(instr->result()); |
| |
| // Check for x / 0. |
| if (instr->hydrogen()->CheckFlag(HValue::kCanBeDivByZero)) { |
| __ tst(right, right); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| |
| // Check for (0 / -x) that will produce negative zero. |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| Label left_not_zero; |
| __ tst(left, Operand(left)); |
| __ b(ne, &left_not_zero); |
| __ tst(right, Operand(right)); |
| DeoptimizeIf(mi, instr->environment()); |
| __ bind(&left_not_zero); |
| } |
| |
| // Check for (-kMinInt / -1). |
| if (instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) { |
| Label left_not_min_int; |
| __ cmp(left, Operand(kMinInt)); |
| __ b(ne, &left_not_min_int); |
| __ cmp(right, Operand(-1)); |
| DeoptimizeIf(eq, instr->environment()); |
| __ bind(&left_not_min_int); |
| } |
| |
| Label done, deoptimize; |
| // Test for a few common cases first. |
| __ cmp(right, Operand(1)); |
| __ mov(result, left, LeaveCC, eq); |
| __ b(eq, &done); |
| |
| __ cmp(right, Operand(2)); |
| __ tst(left, Operand(1), eq); |
| __ mov(result, Operand(left, ASR, 1), LeaveCC, eq); |
| __ b(eq, &done); |
| |
| __ cmp(right, Operand(4)); |
| __ tst(left, Operand(3), eq); |
| __ mov(result, Operand(left, ASR, 2), LeaveCC, eq); |
| __ b(eq, &done); |
| |
| // Call the stub. The numbers in r0 and r1 have |
| // to be tagged to Smis. If that is not possible, deoptimize. |
| DeferredDivI* deferred = new DeferredDivI(this, instr); |
| |
| __ TrySmiTag(left, &deoptimize, scratch); |
| __ TrySmiTag(right, &deoptimize, scratch); |
| |
| __ b(al, deferred->entry()); |
| __ bind(deferred->exit()); |
| |
| // If the result in r0 is a Smi, untag it, else deoptimize. |
| __ JumpIfNotSmi(result, &deoptimize); |
| __ SmiUntag(result); |
| __ b(&done); |
| |
| __ bind(&deoptimize); |
| DeoptimizeIf(al, instr->environment()); |
| __ bind(&done); |
| } |
| |
| |
| template<int T> |
| void LCodeGen::DoDeferredBinaryOpStub(LTemplateInstruction<1, 2, T>* instr, |
| Token::Value op) { |
| Register left = ToRegister(instr->InputAt(0)); |
| Register right = ToRegister(instr->InputAt(1)); |
| |
| __ PushSafepointRegistersAndDoubles(); |
| // Move left to r1 and right to r0 for the stub call. |
| if (left.is(r1)) { |
| __ Move(r0, right); |
| } else if (left.is(r0) && right.is(r1)) { |
| __ Swap(r0, r1, r2); |
| } else if (left.is(r0)) { |
| ASSERT(!right.is(r1)); |
| __ mov(r1, r0); |
| __ mov(r0, right); |
| } else { |
| ASSERT(!left.is(r0) && !right.is(r0)); |
| __ mov(r0, right); |
| __ mov(r1, left); |
| } |
| TypeRecordingBinaryOpStub stub(op, OVERWRITE_LEFT); |
| __ CallStub(&stub); |
| RecordSafepointWithRegistersAndDoubles(instr->pointer_map(), |
| 0, |
| Safepoint::kNoDeoptimizationIndex); |
| // Overwrite the stored value of r0 with the result of the stub. |
| __ StoreToSafepointRegistersAndDoublesSlot(r0, r0); |
| __ PopSafepointRegistersAndDoubles(); |
| } |
| |
| |
| void LCodeGen::DoMulI(LMulI* instr) { |
| Register scratch = scratch0(); |
| Register left = ToRegister(instr->InputAt(0)); |
| Register right = EmitLoadRegister(instr->InputAt(1), scratch); |
| |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero) && |
| !instr->InputAt(1)->IsConstantOperand()) { |
| __ orr(ToRegister(instr->TempAt(0)), left, right); |
| } |
| |
| if (instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) { |
| // scratch:left = left * right. |
| __ smull(left, scratch, left, right); |
| __ mov(ip, Operand(left, ASR, 31)); |
| __ cmp(ip, Operand(scratch)); |
| DeoptimizeIf(ne, instr->environment()); |
| } else { |
| __ mul(left, left, right); |
| } |
| |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| // Bail out if the result is supposed to be negative zero. |
| Label done; |
| __ tst(left, Operand(left)); |
| __ b(ne, &done); |
| if (instr->InputAt(1)->IsConstantOperand()) { |
| if (ToInteger32(LConstantOperand::cast(instr->InputAt(1))) <= 0) { |
| DeoptimizeIf(al, instr->environment()); |
| } |
| } else { |
| // Test the non-zero operand for negative sign. |
| __ cmp(ToRegister(instr->TempAt(0)), Operand(0)); |
| DeoptimizeIf(mi, instr->environment()); |
| } |
| __ bind(&done); |
| } |
| } |
| |
| |
| void LCodeGen::DoBitI(LBitI* instr) { |
| LOperand* left = instr->InputAt(0); |
| LOperand* right = instr->InputAt(1); |
| ASSERT(left->Equals(instr->result())); |
| ASSERT(left->IsRegister()); |
| Register result = ToRegister(left); |
| Register right_reg = EmitLoadRegister(right, ip); |
| switch (instr->op()) { |
| case Token::BIT_AND: |
| __ and_(result, ToRegister(left), Operand(right_reg)); |
| break; |
| case Token::BIT_OR: |
| __ orr(result, ToRegister(left), Operand(right_reg)); |
| break; |
| case Token::BIT_XOR: |
| __ eor(result, ToRegister(left), Operand(right_reg)); |
| break; |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| |
| |
| void LCodeGen::DoShiftI(LShiftI* instr) { |
| Register scratch = scratch0(); |
| LOperand* left = instr->InputAt(0); |
| LOperand* right = instr->InputAt(1); |
| ASSERT(left->Equals(instr->result())); |
| ASSERT(left->IsRegister()); |
| Register result = ToRegister(left); |
| if (right->IsRegister()) { |
| // Mask the right operand. |
| __ and_(scratch, ToRegister(right), Operand(0x1F)); |
| switch (instr->op()) { |
| case Token::SAR: |
| __ mov(result, Operand(result, ASR, scratch)); |
| break; |
| case Token::SHR: |
| if (instr->can_deopt()) { |
| __ mov(result, Operand(result, LSR, scratch), SetCC); |
| DeoptimizeIf(mi, instr->environment()); |
| } else { |
| __ mov(result, Operand(result, LSR, scratch)); |
| } |
| break; |
| case Token::SHL: |
| __ mov(result, Operand(result, LSL, scratch)); |
| break; |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| } else { |
| int value = ToInteger32(LConstantOperand::cast(right)); |
| uint8_t shift_count = static_cast<uint8_t>(value & 0x1F); |
| switch (instr->op()) { |
| case Token::SAR: |
| if (shift_count != 0) { |
| __ mov(result, Operand(result, ASR, shift_count)); |
| } |
| break; |
| case Token::SHR: |
| if (shift_count == 0 && instr->can_deopt()) { |
| __ tst(result, Operand(0x80000000)); |
| DeoptimizeIf(ne, instr->environment()); |
| } else { |
| __ mov(result, Operand(result, LSR, shift_count)); |
| } |
| break; |
| case Token::SHL: |
| if (shift_count != 0) { |
| __ mov(result, Operand(result, LSL, shift_count)); |
| } |
| break; |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoSubI(LSubI* instr) { |
| Register left = ToRegister(instr->InputAt(0)); |
| Register right = EmitLoadRegister(instr->InputAt(1), ip); |
| ASSERT(instr->InputAt(0)->Equals(instr->result())); |
| __ sub(left, left, right, SetCC); |
| if (instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) { |
| DeoptimizeIf(vs, instr->environment()); |
| } |
| } |
| |
| |
| void LCodeGen::DoConstantI(LConstantI* instr) { |
| ASSERT(instr->result()->IsRegister()); |
| __ mov(ToRegister(instr->result()), Operand(instr->value())); |
| } |
| |
| |
| void LCodeGen::DoConstantD(LConstantD* instr) { |
| ASSERT(instr->result()->IsDoubleRegister()); |
| DwVfpRegister result = ToDoubleRegister(instr->result()); |
| double v = instr->value(); |
| __ vmov(result, v); |
| } |
| |
| |
| void LCodeGen::DoConstantT(LConstantT* instr) { |
| ASSERT(instr->result()->IsRegister()); |
| __ mov(ToRegister(instr->result()), Operand(instr->value())); |
| } |
| |
| |
| void LCodeGen::DoJSArrayLength(LJSArrayLength* instr) { |
| Register result = ToRegister(instr->result()); |
| Register array = ToRegister(instr->InputAt(0)); |
| __ ldr(result, FieldMemOperand(array, JSArray::kLengthOffset)); |
| } |
| |
| |
| void LCodeGen::DoExternalArrayLength(LExternalArrayLength* instr) { |
| Register result = ToRegister(instr->result()); |
| Register array = ToRegister(instr->InputAt(0)); |
| __ ldr(result, FieldMemOperand(array, ExternalArray::kLengthOffset)); |
| } |
| |
| |
| void LCodeGen::DoFixedArrayLength(LFixedArrayLength* instr) { |
| Register result = ToRegister(instr->result()); |
| Register array = ToRegister(instr->InputAt(0)); |
| __ ldr(result, FieldMemOperand(array, FixedArray::kLengthOffset)); |
| } |
| |
| |
| void LCodeGen::DoValueOf(LValueOf* instr) { |
| Register input = ToRegister(instr->InputAt(0)); |
| Register result = ToRegister(instr->result()); |
| Register map = ToRegister(instr->TempAt(0)); |
| ASSERT(input.is(result)); |
| Label done; |
| |
| // If the object is a smi return the object. |
| __ tst(input, Operand(kSmiTagMask)); |
| __ b(eq, &done); |
| |
| // If the object is not a value type, return the object. |
| __ CompareObjectType(input, map, map, JS_VALUE_TYPE); |
| __ b(ne, &done); |
| __ ldr(result, FieldMemOperand(input, JSValue::kValueOffset)); |
| |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoBitNotI(LBitNotI* instr) { |
| LOperand* input = instr->InputAt(0); |
| ASSERT(input->Equals(instr->result())); |
| __ mvn(ToRegister(input), Operand(ToRegister(input))); |
| } |
| |
| |
| void LCodeGen::DoThrow(LThrow* instr) { |
| Register input_reg = EmitLoadRegister(instr->InputAt(0), ip); |
| __ push(input_reg); |
| CallRuntime(Runtime::kThrow, 1, instr); |
| |
| if (FLAG_debug_code) { |
| __ stop("Unreachable code."); |
| } |
| } |
| |
| |
| void LCodeGen::DoAddI(LAddI* instr) { |
| LOperand* left = instr->InputAt(0); |
| LOperand* right = instr->InputAt(1); |
| ASSERT(left->Equals(instr->result())); |
| |
| Register right_reg = EmitLoadRegister(right, ip); |
| __ add(ToRegister(left), ToRegister(left), Operand(right_reg), SetCC); |
| |
| if (instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) { |
| DeoptimizeIf(vs, instr->environment()); |
| } |
| } |
| |
| |
| void LCodeGen::DoArithmeticD(LArithmeticD* instr) { |
| DoubleRegister left = ToDoubleRegister(instr->InputAt(0)); |
| DoubleRegister right = ToDoubleRegister(instr->InputAt(1)); |
| switch (instr->op()) { |
| case Token::ADD: |
| __ vadd(left, left, right); |
| break; |
| case Token::SUB: |
| __ vsub(left, left, right); |
| break; |
| case Token::MUL: |
| __ vmul(left, left, right); |
| break; |
| case Token::DIV: |
| __ vdiv(left, left, right); |
| break; |
| case Token::MOD: { |
| // Save r0-r3 on the stack. |
| __ stm(db_w, sp, r0.bit() | r1.bit() | r2.bit() | r3.bit()); |
| |
| __ PrepareCallCFunction(4, scratch0()); |
| __ vmov(r0, r1, left); |
| __ vmov(r2, r3, right); |
| __ CallCFunction(ExternalReference::double_fp_operation(Token::MOD), 4); |
| // Move the result in the double result register. |
| __ GetCFunctionDoubleResult(ToDoubleRegister(instr->result())); |
| |
| // Restore r0-r3. |
| __ ldm(ia_w, sp, r0.bit() | r1.bit() | r2.bit() | r3.bit()); |
| break; |
| } |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| |
| |
| void LCodeGen::DoArithmeticT(LArithmeticT* instr) { |
| ASSERT(ToRegister(instr->InputAt(0)).is(r1)); |
| ASSERT(ToRegister(instr->InputAt(1)).is(r0)); |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| |
| TypeRecordingBinaryOpStub stub(instr->op(), NO_OVERWRITE); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| int LCodeGen::GetNextEmittedBlock(int block) { |
| for (int i = block + 1; i < graph()->blocks()->length(); ++i) { |
| LLabel* label = chunk_->GetLabel(i); |
| if (!label->HasReplacement()) return i; |
| } |
| return -1; |
| } |
| |
| |
| void LCodeGen::EmitBranch(int left_block, int right_block, Condition cc) { |
| int next_block = GetNextEmittedBlock(current_block_); |
| right_block = chunk_->LookupDestination(right_block); |
| left_block = chunk_->LookupDestination(left_block); |
| |
| if (right_block == left_block) { |
| EmitGoto(left_block); |
| } else if (left_block == next_block) { |
| __ b(NegateCondition(cc), chunk_->GetAssemblyLabel(right_block)); |
| } else if (right_block == next_block) { |
| __ b(cc, chunk_->GetAssemblyLabel(left_block)); |
| } else { |
| __ b(cc, chunk_->GetAssemblyLabel(left_block)); |
| __ b(chunk_->GetAssemblyLabel(right_block)); |
| } |
| } |
| |
| |
| void LCodeGen::DoBranch(LBranch* instr) { |
| int true_block = chunk_->LookupDestination(instr->true_block_id()); |
| int false_block = chunk_->LookupDestination(instr->false_block_id()); |
| |
| Representation r = instr->hydrogen()->representation(); |
| if (r.IsInteger32()) { |
| Register reg = ToRegister(instr->InputAt(0)); |
| __ cmp(reg, Operand(0)); |
| EmitBranch(true_block, false_block, ne); |
| } else if (r.IsDouble()) { |
| DoubleRegister reg = ToDoubleRegister(instr->InputAt(0)); |
| Register scratch = scratch0(); |
| |
| // Test the double value. Zero and NaN are false. |
| __ VFPCompareAndLoadFlags(reg, 0.0, scratch); |
| __ tst(scratch, Operand(kVFPZConditionFlagBit | kVFPVConditionFlagBit)); |
| EmitBranch(true_block, false_block, ne); |
| } else { |
| ASSERT(r.IsTagged()); |
| Register reg = ToRegister(instr->InputAt(0)); |
| if (instr->hydrogen()->type().IsBoolean()) { |
| __ LoadRoot(ip, Heap::kTrueValueRootIndex); |
| __ cmp(reg, ip); |
| EmitBranch(true_block, false_block, eq); |
| } else { |
| Label* true_label = chunk_->GetAssemblyLabel(true_block); |
| Label* false_label = chunk_->GetAssemblyLabel(false_block); |
| |
| __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| __ cmp(reg, ip); |
| __ b(eq, false_label); |
| __ LoadRoot(ip, Heap::kTrueValueRootIndex); |
| __ cmp(reg, ip); |
| __ b(eq, true_label); |
| __ LoadRoot(ip, Heap::kFalseValueRootIndex); |
| __ cmp(reg, ip); |
| __ b(eq, false_label); |
| __ cmp(reg, Operand(0)); |
| __ b(eq, false_label); |
| __ tst(reg, Operand(kSmiTagMask)); |
| __ b(eq, true_label); |
| |
| // Test double values. Zero and NaN are false. |
| Label call_stub; |
| DoubleRegister dbl_scratch = d0; |
| Register scratch = scratch0(); |
| __ ldr(scratch, FieldMemOperand(reg, HeapObject::kMapOffset)); |
| __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex); |
| __ cmp(scratch, Operand(ip)); |
| __ b(ne, &call_stub); |
| __ sub(ip, reg, Operand(kHeapObjectTag)); |
| __ vldr(dbl_scratch, ip, HeapNumber::kValueOffset); |
| __ VFPCompareAndLoadFlags(dbl_scratch, 0.0, scratch); |
| __ tst(scratch, Operand(kVFPZConditionFlagBit | kVFPVConditionFlagBit)); |
| __ b(ne, false_label); |
| __ b(true_label); |
| |
| // The conversion stub doesn't cause garbage collections so it's |
| // safe to not record a safepoint after the call. |
| __ bind(&call_stub); |
| ToBooleanStub stub(reg); |
| RegList saved_regs = kJSCallerSaved | kCalleeSaved; |
| __ stm(db_w, sp, saved_regs); |
| __ CallStub(&stub); |
| __ cmp(reg, Operand(0)); |
| __ ldm(ia_w, sp, saved_regs); |
| EmitBranch(true_block, false_block, ne); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::EmitGoto(int block, LDeferredCode* deferred_stack_check) { |
| block = chunk_->LookupDestination(block); |
| int next_block = GetNextEmittedBlock(current_block_); |
| if (block != next_block) { |
| // Perform stack overflow check if this goto needs it before jumping. |
| if (deferred_stack_check != NULL) { |
| __ LoadRoot(ip, Heap::kStackLimitRootIndex); |
| __ cmp(sp, Operand(ip)); |
| __ b(hs, chunk_->GetAssemblyLabel(block)); |
| __ jmp(deferred_stack_check->entry()); |
| deferred_stack_check->SetExit(chunk_->GetAssemblyLabel(block)); |
| } else { |
| __ jmp(chunk_->GetAssemblyLabel(block)); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoDeferredStackCheck(LGoto* instr) { |
| __ PushSafepointRegisters(); |
| __ CallRuntimeSaveDoubles(Runtime::kStackGuard); |
| RecordSafepointWithRegisters( |
| instr->pointer_map(), 0, Safepoint::kNoDeoptimizationIndex); |
| __ PopSafepointRegisters(); |
| } |
| |
| |
| void LCodeGen::DoGoto(LGoto* instr) { |
| class DeferredStackCheck: public LDeferredCode { |
| public: |
| DeferredStackCheck(LCodeGen* codegen, LGoto* instr) |
| : LDeferredCode(codegen), instr_(instr) { } |
| virtual void Generate() { codegen()->DoDeferredStackCheck(instr_); } |
| private: |
| LGoto* instr_; |
| }; |
| |
| DeferredStackCheck* deferred = NULL; |
| if (instr->include_stack_check()) { |
| deferred = new DeferredStackCheck(this, instr); |
| } |
| EmitGoto(instr->block_id(), deferred); |
| } |
| |
| |
| Condition LCodeGen::TokenToCondition(Token::Value op, bool is_unsigned) { |
| Condition cond = kNoCondition; |
| switch (op) { |
| case Token::EQ: |
| case Token::EQ_STRICT: |
| cond = eq; |
| break; |
| case Token::LT: |
| cond = is_unsigned ? lo : lt; |
| break; |
| case Token::GT: |
| cond = is_unsigned ? hi : gt; |
| break; |
| case Token::LTE: |
| cond = is_unsigned ? ls : le; |
| break; |
| case Token::GTE: |
| cond = is_unsigned ? hs : ge; |
| break; |
| case Token::IN: |
| case Token::INSTANCEOF: |
| default: |
| UNREACHABLE(); |
| } |
| return cond; |
| } |
| |
| |
| void LCodeGen::EmitCmpI(LOperand* left, LOperand* right) { |
| __ cmp(ToRegister(left), ToRegister(right)); |
| } |
| |
| |
| void LCodeGen::DoCmpID(LCmpID* instr) { |
| LOperand* left = instr->InputAt(0); |
| LOperand* right = instr->InputAt(1); |
| LOperand* result = instr->result(); |
| Register scratch = scratch0(); |
| |
| Label unordered, done; |
| if (instr->is_double()) { |
| // Compare left and right as doubles and load the |
| // resulting flags into the normal status register. |
| __ VFPCompareAndSetFlags(ToDoubleRegister(left), ToDoubleRegister(right)); |
| // If a NaN is involved, i.e. the result is unordered (V set), |
| // jump to unordered to return false. |
| __ b(vs, &unordered); |
| } else { |
| EmitCmpI(left, right); |
| } |
| |
| Condition cc = TokenToCondition(instr->op(), instr->is_double()); |
| __ LoadRoot(ToRegister(result), Heap::kTrueValueRootIndex); |
| __ b(cc, &done); |
| |
| __ bind(&unordered); |
| __ LoadRoot(ToRegister(result), Heap::kFalseValueRootIndex); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoCmpIDAndBranch(LCmpIDAndBranch* instr) { |
| LOperand* left = instr->InputAt(0); |
| LOperand* right = instr->InputAt(1); |
| int false_block = chunk_->LookupDestination(instr->false_block_id()); |
| int true_block = chunk_->LookupDestination(instr->true_block_id()); |
| |
| if (instr->is_double()) { |
| // Compare left and right as doubles and load the |
| // resulting flags into the normal status register. |
| __ VFPCompareAndSetFlags(ToDoubleRegister(left), ToDoubleRegister(right)); |
| // If a NaN is involved, i.e. the result is unordered (V set), |
| // jump to false block label. |
| __ b(vs, chunk_->GetAssemblyLabel(false_block)); |
| } else { |
| EmitCmpI(left, right); |
| } |
| |
| Condition cc = TokenToCondition(instr->op(), instr->is_double()); |
| EmitBranch(true_block, false_block, cc); |
| } |
| |
| |
| void LCodeGen::DoCmpJSObjectEq(LCmpJSObjectEq* instr) { |
| Register left = ToRegister(instr->InputAt(0)); |
| Register right = ToRegister(instr->InputAt(1)); |
| Register result = ToRegister(instr->result()); |
| |
| __ cmp(left, Operand(right)); |
| __ LoadRoot(result, Heap::kTrueValueRootIndex, eq); |
| __ LoadRoot(result, Heap::kFalseValueRootIndex, ne); |
| } |
| |
| |
| void LCodeGen::DoCmpJSObjectEqAndBranch(LCmpJSObjectEqAndBranch* instr) { |
| Register left = ToRegister(instr->InputAt(0)); |
| Register right = ToRegister(instr->InputAt(1)); |
| int false_block = chunk_->LookupDestination(instr->false_block_id()); |
| int true_block = chunk_->LookupDestination(instr->true_block_id()); |
| |
| __ cmp(left, Operand(right)); |
| EmitBranch(true_block, false_block, eq); |
| } |
| |
| |
| void LCodeGen::DoIsNull(LIsNull* instr) { |
| Register reg = ToRegister(instr->InputAt(0)); |
| Register result = ToRegister(instr->result()); |
| |
| __ LoadRoot(ip, Heap::kNullValueRootIndex); |
| __ cmp(reg, ip); |
| if (instr->is_strict()) { |
| __ LoadRoot(result, Heap::kTrueValueRootIndex, eq); |
| __ LoadRoot(result, Heap::kFalseValueRootIndex, ne); |
| } else { |
| Label true_value, false_value, done; |
| __ b(eq, &true_value); |
| __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| __ cmp(ip, reg); |
| __ b(eq, &true_value); |
| __ tst(reg, Operand(kSmiTagMask)); |
| __ b(eq, &false_value); |
| // Check for undetectable objects by looking in the bit field in |
| // the map. The object has already been smi checked. |
| Register scratch = result; |
| __ ldr(scratch, FieldMemOperand(reg, HeapObject::kMapOffset)); |
| __ ldrb(scratch, FieldMemOperand(scratch, Map::kBitFieldOffset)); |
| __ tst(scratch, Operand(1 << Map::kIsUndetectable)); |
| __ b(ne, &true_value); |
| __ bind(&false_value); |
| __ LoadRoot(result, Heap::kFalseValueRootIndex); |
| __ jmp(&done); |
| __ bind(&true_value); |
| __ LoadRoot(result, Heap::kTrueValueRootIndex); |
| __ bind(&done); |
| } |
| } |
| |
| |
| void LCodeGen::DoIsNullAndBranch(LIsNullAndBranch* instr) { |
| Register scratch = scratch0(); |
| Register reg = ToRegister(instr->InputAt(0)); |
| |
| // TODO(fsc): If the expression is known to be a smi, then it's |
| // definitely not null. Jump to the false block. |
| |
| int true_block = chunk_->LookupDestination(instr->true_block_id()); |
| int false_block = chunk_->LookupDestination(instr->false_block_id()); |
| |
| __ LoadRoot(ip, Heap::kNullValueRootIndex); |
| __ cmp(reg, ip); |
| if (instr->is_strict()) { |
| EmitBranch(true_block, false_block, eq); |
| } else { |
| Label* true_label = chunk_->GetAssemblyLabel(true_block); |
| Label* false_label = chunk_->GetAssemblyLabel(false_block); |
| __ b(eq, true_label); |
| __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| __ cmp(reg, ip); |
| __ b(eq, true_label); |
| __ tst(reg, Operand(kSmiTagMask)); |
| __ b(eq, false_label); |
| // Check for undetectable objects by looking in the bit field in |
| // the map. The object has already been smi checked. |
| __ ldr(scratch, FieldMemOperand(reg, HeapObject::kMapOffset)); |
| __ ldrb(scratch, FieldMemOperand(scratch, Map::kBitFieldOffset)); |
| __ tst(scratch, Operand(1 << Map::kIsUndetectable)); |
| EmitBranch(true_block, false_block, ne); |
| } |
| } |
| |
| |
| Condition LCodeGen::EmitIsObject(Register input, |
| Register temp1, |
| Register temp2, |
| Label* is_not_object, |
| Label* is_object) { |
| __ JumpIfSmi(input, is_not_object); |
| |
| __ LoadRoot(temp1, Heap::kNullValueRootIndex); |
| __ cmp(input, temp1); |
| __ b(eq, is_object); |
| |
| // Load map. |
| __ ldr(temp1, FieldMemOperand(input, HeapObject::kMapOffset)); |
| // Undetectable objects behave like undefined. |
| __ ldrb(temp2, FieldMemOperand(temp1, Map::kBitFieldOffset)); |
| __ tst(temp2, Operand(1 << Map::kIsUndetectable)); |
| __ b(ne, is_not_object); |
| |
| // Load instance type and check that it is in object type range. |
| __ ldrb(temp2, FieldMemOperand(temp1, Map::kInstanceTypeOffset)); |
| __ cmp(temp2, Operand(FIRST_JS_OBJECT_TYPE)); |
| __ b(lt, is_not_object); |
| __ cmp(temp2, Operand(LAST_JS_OBJECT_TYPE)); |
| return le; |
| } |
| |
| |
| void LCodeGen::DoIsObject(LIsObject* instr) { |
| Register reg = ToRegister(instr->InputAt(0)); |
| Register result = ToRegister(instr->result()); |
| Register temp = scratch0(); |
| Label is_false, is_true, done; |
| |
| Condition true_cond = EmitIsObject(reg, result, temp, &is_false, &is_true); |
| __ b(true_cond, &is_true); |
| |
| __ bind(&is_false); |
| __ LoadRoot(result, Heap::kFalseValueRootIndex); |
| __ b(&done); |
| |
| __ bind(&is_true); |
| __ LoadRoot(result, Heap::kTrueValueRootIndex); |
| |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoIsObjectAndBranch(LIsObjectAndBranch* instr) { |
| Register reg = ToRegister(instr->InputAt(0)); |
| Register temp1 = ToRegister(instr->TempAt(0)); |
| Register temp2 = scratch0(); |
| |
| int true_block = chunk_->LookupDestination(instr->true_block_id()); |
| int false_block = chunk_->LookupDestination(instr->false_block_id()); |
| Label* true_label = chunk_->GetAssemblyLabel(true_block); |
| Label* false_label = chunk_->GetAssemblyLabel(false_block); |
| |
| Condition true_cond = |
| EmitIsObject(reg, temp1, temp2, false_label, true_label); |
| |
| EmitBranch(true_block, false_block, true_cond); |
| } |
| |
| |
| void LCodeGen::DoIsSmi(LIsSmi* instr) { |
| ASSERT(instr->hydrogen()->value()->representation().IsTagged()); |
| Register result = ToRegister(instr->result()); |
| Register input_reg = EmitLoadRegister(instr->InputAt(0), ip); |
| __ tst(input_reg, Operand(kSmiTagMask)); |
| __ LoadRoot(result, Heap::kTrueValueRootIndex); |
| Label done; |
| __ b(eq, &done); |
| __ LoadRoot(result, Heap::kFalseValueRootIndex); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoIsSmiAndBranch(LIsSmiAndBranch* instr) { |
| int true_block = chunk_->LookupDestination(instr->true_block_id()); |
| int false_block = chunk_->LookupDestination(instr->false_block_id()); |
| |
| Register input_reg = EmitLoadRegister(instr->InputAt(0), ip); |
| __ tst(input_reg, Operand(kSmiTagMask)); |
| EmitBranch(true_block, false_block, eq); |
| } |
| |
| |
| static InstanceType TestType(HHasInstanceType* instr) { |
| InstanceType from = instr->from(); |
| InstanceType to = instr->to(); |
| if (from == FIRST_TYPE) return to; |
| ASSERT(from == to || to == LAST_TYPE); |
| return from; |
| } |
| |
| |
| static Condition BranchCondition(HHasInstanceType* instr) { |
| InstanceType from = instr->from(); |
| InstanceType to = instr->to(); |
| if (from == to) return eq; |
| if (to == LAST_TYPE) return hs; |
| if (from == FIRST_TYPE) return ls; |
| UNREACHABLE(); |
| return eq; |
| } |
| |
| |
| void LCodeGen::DoHasInstanceType(LHasInstanceType* instr) { |
| Register input = ToRegister(instr->InputAt(0)); |
| Register result = ToRegister(instr->result()); |
| |
| ASSERT(instr->hydrogen()->value()->representation().IsTagged()); |
| Label done; |
| __ tst(input, Operand(kSmiTagMask)); |
| __ LoadRoot(result, Heap::kFalseValueRootIndex, eq); |
| __ b(eq, &done); |
| __ CompareObjectType(input, result, result, TestType(instr->hydrogen())); |
| Condition cond = BranchCondition(instr->hydrogen()); |
| __ LoadRoot(result, Heap::kTrueValueRootIndex, cond); |
| __ LoadRoot(result, Heap::kFalseValueRootIndex, NegateCondition(cond)); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoHasInstanceTypeAndBranch(LHasInstanceTypeAndBranch* instr) { |
| Register scratch = scratch0(); |
| Register input = ToRegister(instr->InputAt(0)); |
| |
| int true_block = chunk_->LookupDestination(instr->true_block_id()); |
| int false_block = chunk_->LookupDestination(instr->false_block_id()); |
| |
| Label* false_label = chunk_->GetAssemblyLabel(false_block); |
| |
| __ tst(input, Operand(kSmiTagMask)); |
| __ b(eq, false_label); |
| |
| __ CompareObjectType(input, scratch, scratch, TestType(instr->hydrogen())); |
| EmitBranch(true_block, false_block, BranchCondition(instr->hydrogen())); |
| } |
| |
| |
| void LCodeGen::DoGetCachedArrayIndex(LGetCachedArrayIndex* instr) { |
| Register input = ToRegister(instr->InputAt(0)); |
| Register result = ToRegister(instr->result()); |
| |
| if (FLAG_debug_code) { |
| __ AbortIfNotString(input); |
| } |
| |
| __ ldr(result, FieldMemOperand(input, String::kHashFieldOffset)); |
| __ IndexFromHash(result, result); |
| } |
| |
| |
| void LCodeGen::DoHasCachedArrayIndex(LHasCachedArrayIndex* instr) { |
| Register input = ToRegister(instr->InputAt(0)); |
| Register result = ToRegister(instr->result()); |
| Register scratch = scratch0(); |
| |
| ASSERT(instr->hydrogen()->value()->representation().IsTagged()); |
| __ ldr(scratch, |
| FieldMemOperand(input, String::kHashFieldOffset)); |
| __ tst(scratch, Operand(String::kContainsCachedArrayIndexMask)); |
| __ LoadRoot(result, Heap::kTrueValueRootIndex, eq); |
| __ LoadRoot(result, Heap::kFalseValueRootIndex, ne); |
| } |
| |
| |
| void LCodeGen::DoHasCachedArrayIndexAndBranch( |
| LHasCachedArrayIndexAndBranch* instr) { |
| Register input = ToRegister(instr->InputAt(0)); |
| Register scratch = scratch0(); |
| |
| int true_block = chunk_->LookupDestination(instr->true_block_id()); |
| int false_block = chunk_->LookupDestination(instr->false_block_id()); |
| |
| __ ldr(scratch, |
| FieldMemOperand(input, String::kHashFieldOffset)); |
| __ tst(scratch, Operand(String::kContainsCachedArrayIndexMask)); |
| EmitBranch(true_block, false_block, eq); |
| } |
| |
| |
| // Branches to a label or falls through with the answer in flags. Trashes |
| // the temp registers, but not the input. Only input and temp2 may alias. |
| void LCodeGen::EmitClassOfTest(Label* is_true, |
| Label* is_false, |
| Handle<String>class_name, |
| Register input, |
| Register temp, |
| Register temp2) { |
| ASSERT(!input.is(temp)); |
| ASSERT(!temp.is(temp2)); // But input and temp2 may be the same register. |
| __ tst(input, Operand(kSmiTagMask)); |
| __ b(eq, is_false); |
| __ CompareObjectType(input, temp, temp2, FIRST_JS_OBJECT_TYPE); |
| __ b(lt, is_false); |
| |
| // Map is now in temp. |
| // Functions have class 'Function'. |
| __ CompareInstanceType(temp, temp2, JS_FUNCTION_TYPE); |
| if (class_name->IsEqualTo(CStrVector("Function"))) { |
| __ b(eq, is_true); |
| } else { |
| __ b(eq, is_false); |
| } |
| |
| // Check if the constructor in the map is a function. |
| __ ldr(temp, FieldMemOperand(temp, Map::kConstructorOffset)); |
| |
| // As long as JS_FUNCTION_TYPE is the last instance type and it is |
| // right after LAST_JS_OBJECT_TYPE, we can avoid checking for |
| // LAST_JS_OBJECT_TYPE. |
| ASSERT(LAST_TYPE == JS_FUNCTION_TYPE); |
| ASSERT(JS_FUNCTION_TYPE == LAST_JS_OBJECT_TYPE + 1); |
| |
| // Objects with a non-function constructor have class 'Object'. |
| __ CompareObjectType(temp, temp2, temp2, JS_FUNCTION_TYPE); |
| if (class_name->IsEqualTo(CStrVector("Object"))) { |
| __ b(ne, is_true); |
| } else { |
| __ b(ne, is_false); |
| } |
| |
| // temp now contains the constructor function. Grab the |
| // instance class name from there. |
| __ ldr(temp, FieldMemOperand(temp, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(temp, FieldMemOperand(temp, |
| SharedFunctionInfo::kInstanceClassNameOffset)); |
| // The class name we are testing against is a symbol because it's a literal. |
| // The name in the constructor is a symbol 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 symbols it is sufficient to use an identity |
| // comparison. |
| __ cmp(temp, Operand(class_name)); |
| // End with the answer in flags. |
| } |
| |
| |
| void LCodeGen::DoClassOfTest(LClassOfTest* instr) { |
| Register input = ToRegister(instr->InputAt(0)); |
| Register result = ToRegister(instr->result()); |
| ASSERT(input.is(result)); |
| Handle<String> class_name = instr->hydrogen()->class_name(); |
| |
| Label done, is_true, is_false; |
| |
| EmitClassOfTest(&is_true, &is_false, class_name, input, scratch0(), input); |
| __ b(ne, &is_false); |
| |
| __ bind(&is_true); |
| __ LoadRoot(result, Heap::kTrueValueRootIndex); |
| __ jmp(&done); |
| |
| __ bind(&is_false); |
| __ LoadRoot(result, Heap::kFalseValueRootIndex); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoClassOfTestAndBranch(LClassOfTestAndBranch* instr) { |
| Register input = ToRegister(instr->InputAt(0)); |
| Register temp = scratch0(); |
| Register temp2 = ToRegister(instr->TempAt(0)); |
| Handle<String> class_name = instr->hydrogen()->class_name(); |
| |
| int true_block = chunk_->LookupDestination(instr->true_block_id()); |
| int false_block = chunk_->LookupDestination(instr->false_block_id()); |
| |
| Label* true_label = chunk_->GetAssemblyLabel(true_block); |
| Label* false_label = chunk_->GetAssemblyLabel(false_block); |
| |
| EmitClassOfTest(true_label, false_label, class_name, input, temp, temp2); |
| |
| EmitBranch(true_block, false_block, eq); |
| } |
| |
| |
| void LCodeGen::DoCmpMapAndBranch(LCmpMapAndBranch* instr) { |
| Register reg = ToRegister(instr->InputAt(0)); |
| Register temp = ToRegister(instr->TempAt(0)); |
| int true_block = instr->true_block_id(); |
| int false_block = instr->false_block_id(); |
| |
| __ ldr(temp, FieldMemOperand(reg, HeapObject::kMapOffset)); |
| __ cmp(temp, Operand(instr->map())); |
| EmitBranch(true_block, false_block, eq); |
| } |
| |
| |
| void LCodeGen::DoInstanceOf(LInstanceOf* instr) { |
| ASSERT(ToRegister(instr->InputAt(0)).is(r0)); // Object is in r0. |
| ASSERT(ToRegister(instr->InputAt(1)).is(r1)); // Function is in r1. |
| |
| InstanceofStub stub(InstanceofStub::kArgsInRegisters); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| |
| Label true_value, done; |
| __ tst(r0, r0); |
| __ mov(r0, Operand(Factory::false_value()), LeaveCC, ne); |
| __ mov(r0, Operand(Factory::true_value()), LeaveCC, eq); |
| } |
| |
| |
| void LCodeGen::DoInstanceOfAndBranch(LInstanceOfAndBranch* instr) { |
| ASSERT(ToRegister(instr->InputAt(0)).is(r0)); // Object is in r0. |
| ASSERT(ToRegister(instr->InputAt(1)).is(r1)); // Function is in r1. |
| |
| int true_block = chunk_->LookupDestination(instr->true_block_id()); |
| int false_block = chunk_->LookupDestination(instr->false_block_id()); |
| |
| InstanceofStub stub(InstanceofStub::kArgsInRegisters); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| __ tst(r0, Operand(r0)); |
| EmitBranch(true_block, false_block, eq); |
| } |
| |
| |
| void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) { |
| class DeferredInstanceOfKnownGlobal: public LDeferredCode { |
| public: |
| DeferredInstanceOfKnownGlobal(LCodeGen* codegen, |
| LInstanceOfKnownGlobal* instr) |
| : LDeferredCode(codegen), instr_(instr) { } |
| virtual void Generate() { |
| codegen()->DoDeferredLInstanceOfKnownGlobal(instr_, &map_check_); |
| } |
| |
| Label* map_check() { return &map_check_; } |
| |
| private: |
| LInstanceOfKnownGlobal* instr_; |
| Label map_check_; |
| }; |
| |
| DeferredInstanceOfKnownGlobal* deferred; |
| deferred = new DeferredInstanceOfKnownGlobal(this, instr); |
| |
| Label done, false_result; |
| Register object = ToRegister(instr->InputAt(0)); |
| Register temp = ToRegister(instr->TempAt(0)); |
| Register result = ToRegister(instr->result()); |
| |
| ASSERT(object.is(r0)); |
| ASSERT(result.is(r0)); |
| |
| // A Smi is not instance of anything. |
| __ JumpIfSmi(object, &false_result); |
| |
| // This is the inlined call site instanceof cache. The two occurences of the |
| // hole value will be patched to the last map/result pair generated by the |
| // instanceof stub. |
| Label cache_miss; |
| Register map = temp; |
| __ ldr(map, FieldMemOperand(object, HeapObject::kMapOffset)); |
| __ bind(deferred->map_check()); // Label for calculating code patching. |
| // We use Factory::the_hole_value() on purpose instead of loading from the |
| // root array to force relocation to be able to later patch with |
| // the cached map. |
| __ mov(ip, Operand(Factory::the_hole_value())); |
| __ cmp(map, Operand(ip)); |
| __ b(ne, &cache_miss); |
| // We use Factory::the_hole_value() on purpose instead of loading from the |
| // root array to force relocation to be able to later patch |
| // with true or false. |
| __ mov(result, Operand(Factory::the_hole_value())); |
| __ b(&done); |
| |
| // The inlined call site cache did not match. Check null and string before |
| // calling the deferred code. |
| __ bind(&cache_miss); |
| // Null is not instance of anything. |
| __ LoadRoot(ip, Heap::kNullValueRootIndex); |
| __ cmp(object, Operand(ip)); |
| __ b(eq, &false_result); |
| |
| // String values is not instance of anything. |
| Condition is_string = masm_->IsObjectStringType(object, temp); |
| __ b(is_string, &false_result); |
| |
| // Go to the deferred code. |
| __ b(deferred->entry()); |
| |
| __ bind(&false_result); |
| __ LoadRoot(result, Heap::kFalseValueRootIndex); |
| |
| // Here result has either true or false. Deferred code also produces true or |
| // false object. |
| __ bind(deferred->exit()); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoDeferredLInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr, |
| Label* map_check) { |
| Register result = ToRegister(instr->result()); |
| ASSERT(result.is(r0)); |
| |
| InstanceofStub::Flags flags = InstanceofStub::kNoFlags; |
| flags = static_cast<InstanceofStub::Flags>( |
| flags | InstanceofStub::kArgsInRegisters); |
| flags = static_cast<InstanceofStub::Flags>( |
| flags | InstanceofStub::kCallSiteInlineCheck); |
| flags = static_cast<InstanceofStub::Flags>( |
| flags | InstanceofStub::kReturnTrueFalseObject); |
| InstanceofStub stub(flags); |
| |
| __ PushSafepointRegisters(); |
| |
| // Get the temp register reserved by the instruction. This needs to be r4 as |
| // its slot of the pushing of safepoint registers is used to communicate the |
| // offset to the location of the map check. |
| Register temp = ToRegister(instr->TempAt(0)); |
| ASSERT(temp.is(r4)); |
| __ mov(InstanceofStub::right(), Operand(instr->function())); |
| static const int kAdditionalDelta = 4; |
| int delta = masm_->InstructionsGeneratedSince(map_check) + kAdditionalDelta; |
| Label before_push_delta; |
| __ bind(&before_push_delta); |
| __ BlockConstPoolFor(kAdditionalDelta); |
| __ mov(temp, Operand(delta * kPointerSize)); |
| __ StoreToSafepointRegisterSlot(temp, temp); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| // Put the result value into the result register slot and |
| // restore all registers. |
| __ StoreToSafepointRegisterSlot(result, result); |
| |
| __ PopSafepointRegisters(); |
| } |
| |
| |
| static Condition ComputeCompareCondition(Token::Value op) { |
| switch (op) { |
| case Token::EQ_STRICT: |
| case Token::EQ: |
| return eq; |
| case Token::LT: |
| return lt; |
| case Token::GT: |
| return gt; |
| case Token::LTE: |
| return le; |
| case Token::GTE: |
| return ge; |
| default: |
| UNREACHABLE(); |
| return kNoCondition; |
| } |
| } |
| |
| |
| void LCodeGen::DoCmpT(LCmpT* instr) { |
| Token::Value op = instr->op(); |
| |
| Handle<Code> ic = CompareIC::GetUninitialized(op); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| __ cmp(r0, Operand(0)); // This instruction also signals no smi code inlined. |
| |
| Condition condition = ComputeCompareCondition(op); |
| if (op == Token::GT || op == Token::LTE) { |
| condition = ReverseCondition(condition); |
| } |
| __ LoadRoot(ToRegister(instr->result()), |
| Heap::kTrueValueRootIndex, |
| condition); |
| __ LoadRoot(ToRegister(instr->result()), |
| Heap::kFalseValueRootIndex, |
| NegateCondition(condition)); |
| } |
| |
| |
| void LCodeGen::DoCmpTAndBranch(LCmpTAndBranch* instr) { |
| Token::Value op = instr->op(); |
| int true_block = chunk_->LookupDestination(instr->true_block_id()); |
| int false_block = chunk_->LookupDestination(instr->false_block_id()); |
| |
| Handle<Code> ic = CompareIC::GetUninitialized(op); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| |
| // The compare stub expects compare condition and the input operands |
| // reversed for GT and LTE. |
| Condition condition = ComputeCompareCondition(op); |
| if (op == Token::GT || op == Token::LTE) { |
| condition = ReverseCondition(condition); |
| } |
| __ cmp(r0, Operand(0)); |
| EmitBranch(true_block, false_block, condition); |
| } |
| |
| |
| void LCodeGen::DoReturn(LReturn* instr) { |
| if (FLAG_trace) { |
| // Push the return value on the stack as the parameter. |
| // Runtime::TraceExit returns its parameter in r0. |
| __ push(r0); |
| __ CallRuntime(Runtime::kTraceExit, 1); |
| } |
| int32_t sp_delta = (ParameterCount() + 1) * kPointerSize; |
| __ mov(sp, fp); |
| __ ldm(ia_w, sp, fp.bit() | lr.bit()); |
| __ add(sp, sp, Operand(sp_delta)); |
| __ Jump(lr); |
| } |
| |
| |
| void LCodeGen::DoLoadGlobalCell(LLoadGlobalCell* instr) { |
| Register result = ToRegister(instr->result()); |
| __ mov(ip, Operand(Handle<Object>(instr->hydrogen()->cell()))); |
| __ ldr(result, FieldMemOperand(ip, JSGlobalPropertyCell::kValueOffset)); |
| if (instr->hydrogen()->check_hole_value()) { |
| __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| __ cmp(result, ip); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| } |
| |
| |
| void LCodeGen::DoLoadGlobalGeneric(LLoadGlobalGeneric* instr) { |
| ASSERT(ToRegister(instr->global_object()).is(r0)); |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| |
| __ mov(r2, Operand(instr->name())); |
| RelocInfo::Mode mode = instr->for_typeof() ? RelocInfo::CODE_TARGET : |
| RelocInfo::CODE_TARGET_CONTEXT; |
| Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize)); |
| CallCode(ic, mode, instr); |
| } |
| |
| |
| void LCodeGen::DoStoreGlobal(LStoreGlobal* instr) { |
| Register value = ToRegister(instr->InputAt(0)); |
| Register scratch = scratch0(); |
| |
| // Load the cell. |
| __ mov(scratch, Operand(Handle<Object>(instr->hydrogen()->cell()))); |
| |
| // If the cell we are storing to contains the hole it could have |
| // been deleted from the property dictionary. In that case, we need |
| // to update the property details in the property dictionary to mark |
| // it as no longer deleted. |
| if (instr->hydrogen()->check_hole_value()) { |
| Register scratch2 = ToRegister(instr->TempAt(0)); |
| __ ldr(scratch2, |
| FieldMemOperand(scratch, JSGlobalPropertyCell::kValueOffset)); |
| __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| __ cmp(scratch2, ip); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| |
| // Store the value. |
| __ str(value, FieldMemOperand(scratch, JSGlobalPropertyCell::kValueOffset)); |
| } |
| |
| |
| void LCodeGen::DoLoadContextSlot(LLoadContextSlot* instr) { |
| Register context = ToRegister(instr->context()); |
| Register result = ToRegister(instr->result()); |
| __ ldr(result, ContextOperand(context, instr->slot_index())); |
| } |
| |
| |
| void LCodeGen::DoStoreContextSlot(LStoreContextSlot* instr) { |
| Register context = ToRegister(instr->context()); |
| Register value = ToRegister(instr->value()); |
| __ str(value, ContextOperand(context, instr->slot_index())); |
| if (instr->needs_write_barrier()) { |
| int offset = Context::SlotOffset(instr->slot_index()); |
| __ RecordWrite(context, Operand(offset), value, scratch0()); |
| } |
| } |
| |
| |
| void LCodeGen::DoLoadNamedField(LLoadNamedField* instr) { |
| Register object = ToRegister(instr->InputAt(0)); |
| Register result = ToRegister(instr->result()); |
| if (instr->hydrogen()->is_in_object()) { |
| __ ldr(result, FieldMemOperand(object, instr->hydrogen()->offset())); |
| } else { |
| __ ldr(result, FieldMemOperand(object, JSObject::kPropertiesOffset)); |
| __ ldr(result, FieldMemOperand(result, instr->hydrogen()->offset())); |
| } |
| } |
| |
| |
| void LCodeGen::DoLoadNamedGeneric(LLoadNamedGeneric* instr) { |
| ASSERT(ToRegister(instr->object()).is(r0)); |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| |
| // Name is always in r2. |
| __ mov(r2, Operand(instr->name())); |
| Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize)); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| void LCodeGen::DoLoadFunctionPrototype(LLoadFunctionPrototype* instr) { |
| Register scratch = scratch0(); |
| Register function = ToRegister(instr->function()); |
| Register result = ToRegister(instr->result()); |
| |
| // Check that the function really is a function. Load map into the |
| // result register. |
| __ CompareObjectType(function, result, scratch, JS_FUNCTION_TYPE); |
| DeoptimizeIf(ne, instr->environment()); |
| |
| // Make sure that the function has an instance prototype. |
| Label non_instance; |
| __ ldrb(scratch, FieldMemOperand(result, Map::kBitFieldOffset)); |
| __ tst(scratch, Operand(1 << Map::kHasNonInstancePrototype)); |
| __ b(ne, &non_instance); |
| |
| // Get the prototype or initial map from the function. |
| __ ldr(result, |
| FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| |
| // Check that the function has a prototype or an initial map. |
| __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| __ cmp(result, ip); |
| DeoptimizeIf(eq, instr->environment()); |
| |
| // If the function does not have an initial map, we're done. |
| Label done; |
| __ CompareObjectType(result, scratch, scratch, MAP_TYPE); |
| __ b(ne, &done); |
| |
| // Get the prototype from the initial map. |
| __ ldr(result, FieldMemOperand(result, Map::kPrototypeOffset)); |
| __ jmp(&done); |
| |
| // Non-instance prototype: Fetch prototype from constructor field |
| // in initial map. |
| __ bind(&non_instance); |
| __ ldr(result, FieldMemOperand(result, Map::kConstructorOffset)); |
| |
| // All done. |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoLoadElements(LLoadElements* instr) { |
| Register result = ToRegister(instr->result()); |
| Register input = ToRegister(instr->InputAt(0)); |
| Register scratch = scratch0(); |
| |
| __ ldr(result, FieldMemOperand(input, JSObject::kElementsOffset)); |
| if (FLAG_debug_code) { |
| Label done; |
| __ ldr(scratch, FieldMemOperand(result, HeapObject::kMapOffset)); |
| __ LoadRoot(ip, Heap::kFixedArrayMapRootIndex); |
| __ cmp(scratch, ip); |
| __ b(eq, &done); |
| __ LoadRoot(ip, Heap::kExternalPixelArrayMapRootIndex); |
| __ cmp(scratch, ip); |
| __ b(eq, &done); |
| __ LoadRoot(ip, Heap::kFixedCOWArrayMapRootIndex); |
| __ cmp(scratch, ip); |
| __ Check(eq, "Check for fast elements failed."); |
| __ bind(&done); |
| } |
| } |
| |
| |
| void LCodeGen::DoLoadExternalArrayPointer( |
| LLoadExternalArrayPointer* instr) { |
| Register to_reg = ToRegister(instr->result()); |
| Register from_reg = ToRegister(instr->InputAt(0)); |
| __ ldr(to_reg, FieldMemOperand(from_reg, |
| ExternalArray::kExternalPointerOffset)); |
| } |
| |
| |
| void LCodeGen::DoAccessArgumentsAt(LAccessArgumentsAt* instr) { |
| Register arguments = ToRegister(instr->arguments()); |
| Register length = ToRegister(instr->length()); |
| Register index = ToRegister(instr->index()); |
| Register result = ToRegister(instr->result()); |
| |
| // Bailout index is not a valid argument index. Use unsigned check to get |
| // negative check for free. |
| __ sub(length, length, index, SetCC); |
| DeoptimizeIf(ls, instr->environment()); |
| |
| // There are two words between the frame pointer and the last argument. |
| // Subtracting from length accounts for one of them add one more. |
| __ add(length, length, Operand(1)); |
| __ ldr(result, MemOperand(arguments, length, LSL, kPointerSizeLog2)); |
| } |
| |
| |
| void LCodeGen::DoLoadKeyedFastElement(LLoadKeyedFastElement* instr) { |
| Register elements = ToRegister(instr->elements()); |
| Register key = EmitLoadRegister(instr->key(), scratch0()); |
| Register result = ToRegister(instr->result()); |
| Register scratch = scratch0(); |
| ASSERT(result.is(elements)); |
| |
| // Load the result. |
| __ add(scratch, elements, Operand(key, LSL, kPointerSizeLog2)); |
| __ ldr(result, FieldMemOperand(scratch, FixedArray::kHeaderSize)); |
| |
| // Check for the hole value. |
| __ LoadRoot(scratch, Heap::kTheHoleValueRootIndex); |
| __ cmp(result, scratch); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| |
| |
| void LCodeGen::DoLoadPixelArrayElement(LLoadPixelArrayElement* instr) { |
| Register external_pointer = ToRegister(instr->external_pointer()); |
| Register key = ToRegister(instr->key()); |
| Register result = ToRegister(instr->result()); |
| |
| // Load the result. |
| __ ldrb(result, MemOperand(external_pointer, key)); |
| } |
| |
| |
| void LCodeGen::DoLoadKeyedGeneric(LLoadKeyedGeneric* instr) { |
| ASSERT(ToRegister(instr->object()).is(r1)); |
| ASSERT(ToRegister(instr->key()).is(r0)); |
| |
| Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize)); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| void LCodeGen::DoArgumentsElements(LArgumentsElements* instr) { |
| Register scratch = scratch0(); |
| Register result = ToRegister(instr->result()); |
| |
| // Check if the calling frame is an arguments adaptor frame. |
| Label done, adapted; |
| __ ldr(scratch, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| __ ldr(result, MemOperand(scratch, StandardFrameConstants::kContextOffset)); |
| __ cmp(result, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| |
| // Result is the frame pointer for the frame if not adapted and for the real |
| // frame below the adaptor frame if adapted. |
| __ mov(result, fp, LeaveCC, ne); |
| __ mov(result, scratch, LeaveCC, eq); |
| } |
| |
| |
| void LCodeGen::DoArgumentsLength(LArgumentsLength* instr) { |
| Register elem = ToRegister(instr->InputAt(0)); |
| Register result = ToRegister(instr->result()); |
| |
| Label done; |
| |
| // If no arguments adaptor frame the number of arguments is fixed. |
| __ cmp(fp, elem); |
| __ mov(result, Operand(scope()->num_parameters())); |
| __ b(eq, &done); |
| |
| // Arguments adaptor frame present. Get argument length from there. |
| __ ldr(result, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| __ ldr(result, |
| MemOperand(result, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| __ SmiUntag(result); |
| |
| // Argument length is in result register. |
| __ bind(&done); |
| } |
| |
| |
| 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()); |
| Register scratch = scratch0(); |
| ASSERT(receiver.is(r0)); // Used for parameter count. |
| ASSERT(function.is(r1)); // Required by InvokeFunction. |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| |
| // If the receiver is null or undefined, we have to pass the global object |
| // as a receiver. |
| Label global_object, receiver_ok; |
| __ LoadRoot(scratch, Heap::kNullValueRootIndex); |
| __ cmp(receiver, scratch); |
| __ b(eq, &global_object); |
| __ LoadRoot(scratch, Heap::kUndefinedValueRootIndex); |
| __ cmp(receiver, scratch); |
| __ b(eq, &global_object); |
| |
| // Deoptimize if the receiver is not a JS object. |
| __ tst(receiver, Operand(kSmiTagMask)); |
| DeoptimizeIf(eq, instr->environment()); |
| __ CompareObjectType(receiver, scratch, scratch, FIRST_JS_OBJECT_TYPE); |
| DeoptimizeIf(lo, instr->environment()); |
| __ jmp(&receiver_ok); |
| |
| __ bind(&global_object); |
| __ ldr(receiver, GlobalObjectOperand()); |
| __ bind(&receiver_ok); |
| |
| // Copy the arguments to this function possibly from the |
| // adaptor frame below it. |
| const uint32_t kArgumentsLimit = 1 * KB; |
| __ cmp(length, Operand(kArgumentsLimit)); |
| DeoptimizeIf(hi, instr->environment()); |
| |
| // Push the receiver and use the register to keep the original |
| // number of arguments. |
| __ push(receiver); |
| __ mov(receiver, length); |
| // The arguments are at a one pointer size offset from elements. |
| __ add(elements, elements, Operand(1 * kPointerSize)); |
| |
| // 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. |
| __ tst(length, Operand(length)); |
| __ b(eq, &invoke); |
| __ bind(&loop); |
| __ ldr(scratch, MemOperand(elements, length, LSL, 2)); |
| __ push(scratch); |
| __ sub(length, length, Operand(1), SetCC); |
| __ b(ne, &loop); |
| |
| __ bind(&invoke); |
| ASSERT(instr->HasPointerMap() && instr->HasDeoptimizationEnvironment()); |
| LPointerMap* pointers = instr->pointer_map(); |
| LEnvironment* env = instr->deoptimization_environment(); |
| RecordPosition(pointers->position()); |
| RegisterEnvironmentForDeoptimization(env); |
| SafepointGenerator safepoint_generator(this, |
| pointers, |
| env->deoptimization_index()); |
| // The number of arguments is stored in receiver which is r0, as expected |
| // by InvokeFunction. |
| v8::internal::ParameterCount actual(receiver); |
| __ InvokeFunction(function, actual, CALL_FUNCTION, &safepoint_generator); |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| } |
| |
| |
| void LCodeGen::DoPushArgument(LPushArgument* instr) { |
| LOperand* argument = instr->InputAt(0); |
| if (argument->IsDoubleRegister() || argument->IsDoubleStackSlot()) { |
| Abort("DoPushArgument not implemented for double type."); |
| } else { |
| Register argument_reg = EmitLoadRegister(argument, ip); |
| __ push(argument_reg); |
| } |
| } |
| |
| |
| void LCodeGen::DoContext(LContext* instr) { |
| Register result = ToRegister(instr->result()); |
| __ mov(result, cp); |
| } |
| |
| |
| void LCodeGen::DoOuterContext(LOuterContext* instr) { |
| Register context = ToRegister(instr->context()); |
| Register result = ToRegister(instr->result()); |
| __ ldr(result, |
| MemOperand(context, Context::SlotOffset(Context::CLOSURE_INDEX))); |
| __ ldr(result, FieldMemOperand(result, JSFunction::kContextOffset)); |
| } |
| |
| |
| void LCodeGen::DoGlobalObject(LGlobalObject* instr) { |
| Register context = ToRegister(instr->context()); |
| Register result = ToRegister(instr->result()); |
| __ ldr(result, ContextOperand(cp, Context::GLOBAL_INDEX)); |
| } |
| |
| |
| void LCodeGen::DoGlobalReceiver(LGlobalReceiver* instr) { |
| Register global = ToRegister(instr->global()); |
| Register result = ToRegister(instr->result()); |
| __ ldr(result, FieldMemOperand(global, GlobalObject::kGlobalReceiverOffset)); |
| } |
| |
| |
| void LCodeGen::CallKnownFunction(Handle<JSFunction> function, |
| int arity, |
| LInstruction* instr) { |
| // Change context if needed. |
| bool change_context = |
| (info()->closure()->context() != function->context()) || |
| scope()->contains_with() || |
| (scope()->num_heap_slots() > 0); |
| if (change_context) { |
| __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| } |
| |
| // Set r0 to arguments count if adaption is not needed. Assumes that r0 |
| // is available to write to at this point. |
| if (!function->NeedsArgumentsAdaption()) { |
| __ mov(r0, Operand(arity)); |
| } |
| |
| LPointerMap* pointers = instr->pointer_map(); |
| RecordPosition(pointers->position()); |
| |
| // Invoke function. |
| __ ldr(ip, FieldMemOperand(r1, JSFunction::kCodeEntryOffset)); |
| __ Call(ip); |
| |
| // Setup deoptimization. |
| RegisterLazyDeoptimization(instr); |
| |
| // Restore context. |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| } |
| |
| |
| void LCodeGen::DoCallConstantFunction(LCallConstantFunction* instr) { |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| __ mov(r1, Operand(instr->function())); |
| CallKnownFunction(instr->function(), instr->arity(), instr); |
| } |
| |
| |
| void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LUnaryMathOperation* instr) { |
| ASSERT(instr->InputAt(0)->Equals(instr->result())); |
| Register input = ToRegister(instr->InputAt(0)); |
| Register scratch = scratch0(); |
| |
| // Deoptimize if not a heap number. |
| __ ldr(scratch, FieldMemOperand(input, HeapObject::kMapOffset)); |
| __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex); |
| __ cmp(scratch, Operand(ip)); |
| DeoptimizeIf(ne, instr->environment()); |
| |
| Label done; |
| Register exponent = scratch0(); |
| scratch = no_reg; |
| __ ldr(exponent, FieldMemOperand(input, 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| would be restored |
| // unchanged by popping safepoint registers. |
| __ tst(exponent, Operand(HeapNumber::kSignMask)); |
| __ b(eq, &done); |
| |
| // Input is negative. Reverse its sign. |
| // Preserve the value of all registers. |
| __ PushSafepointRegisters(); |
| |
| // Registers were saved at the safepoint, so we can use |
| // many scratch registers. |
| Register tmp1 = input.is(r1) ? r0 : r1; |
| Register tmp2 = input.is(r2) ? r0 : r2; |
| Register tmp3 = input.is(r3) ? r0 : r3; |
| Register tmp4 = input.is(r4) ? r0 : r4; |
| |
| // exponent: floating point exponent value. |
| |
| Label allocated, slow; |
| __ LoadRoot(tmp4, Heap::kHeapNumberMapRootIndex); |
| __ AllocateHeapNumber(tmp1, tmp2, tmp3, tmp4, &slow); |
| __ b(&allocated); |
| |
| // Slow case: Call the runtime system to do the number allocation. |
| __ bind(&slow); |
| |
| __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber); |
| RecordSafepointWithRegisters( |
| instr->pointer_map(), 0, Safepoint::kNoDeoptimizationIndex); |
| // Set the pointer to the new heap number in tmp. |
| if (!tmp1.is(r0)) __ mov(tmp1, Operand(r0)); |
| // Restore input_reg after call to runtime. |
| __ LoadFromSafepointRegisterSlot(input, input); |
| __ ldr(exponent, FieldMemOperand(input, HeapNumber::kExponentOffset)); |
| |
| __ bind(&allocated); |
| // exponent: floating point exponent value. |
| // tmp1: allocated heap number. |
| __ bic(exponent, exponent, Operand(HeapNumber::kSignMask)); |
| __ str(exponent, FieldMemOperand(tmp1, HeapNumber::kExponentOffset)); |
| __ ldr(tmp2, FieldMemOperand(input, HeapNumber::kMantissaOffset)); |
| __ str(tmp2, FieldMemOperand(tmp1, HeapNumber::kMantissaOffset)); |
| |
| __ StoreToSafepointRegisterSlot(tmp1, input); |
| __ PopSafepointRegisters(); |
| |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::EmitIntegerMathAbs(LUnaryMathOperation* instr) { |
| Register input = ToRegister(instr->InputAt(0)); |
| __ cmp(input, Operand(0)); |
| // We can make rsb conditional because the previous cmp instruction |
| // will clear the V (overflow) flag and rsb won't set this flag |
| // if input is positive. |
| __ rsb(input, input, Operand(0), SetCC, mi); |
| // Deoptimize on overflow. |
| DeoptimizeIf(vs, instr->environment()); |
| } |
| |
| |
| void LCodeGen::DoMathAbs(LUnaryMathOperation* instr) { |
| // Class for deferred case. |
| class DeferredMathAbsTaggedHeapNumber: public LDeferredCode { |
| public: |
| DeferredMathAbsTaggedHeapNumber(LCodeGen* codegen, |
| LUnaryMathOperation* instr) |
| : LDeferredCode(codegen), instr_(instr) { } |
| virtual void Generate() { |
| codegen()->DoDeferredMathAbsTaggedHeapNumber(instr_); |
| } |
| private: |
| LUnaryMathOperation* instr_; |
| }; |
| |
| ASSERT(instr->InputAt(0)->Equals(instr->result())); |
| Representation r = instr->hydrogen()->value()->representation(); |
| if (r.IsDouble()) { |
| DwVfpRegister input = ToDoubleRegister(instr->InputAt(0)); |
| __ vabs(input, input); |
| } else if (r.IsInteger32()) { |
| EmitIntegerMathAbs(instr); |
| } else { |
| // Representation is tagged. |
| DeferredMathAbsTaggedHeapNumber* deferred = |
| new DeferredMathAbsTaggedHeapNumber(this, instr); |
| Register input = ToRegister(instr->InputAt(0)); |
| // Smi check. |
| __ JumpIfNotSmi(input, deferred->entry()); |
| // If smi, handle it directly. |
| EmitIntegerMathAbs(instr); |
| __ bind(deferred->exit()); |
| } |
| } |
| |
| |
| void LCodeGen::DoMathFloor(LUnaryMathOperation* instr) { |
| DoubleRegister input = ToDoubleRegister(instr->InputAt(0)); |
| Register result = ToRegister(instr->result()); |
| SwVfpRegister single_scratch = double_scratch0().low(); |
| Register scratch1 = scratch0(); |
| Register scratch2 = ToRegister(instr->TempAt(0)); |
| |
| __ EmitVFPTruncate(kRoundToMinusInf, |
| single_scratch, |
| input, |
| scratch1, |
| scratch2); |
| DeoptimizeIf(ne, instr->environment()); |
| |
| // Move the result back to general purpose register r0. |
| __ vmov(result, single_scratch); |
| |
| // Test for -0. |
| Label done; |
| __ cmp(result, Operand(0)); |
| __ b(ne, &done); |
| __ vmov(scratch1, input.high()); |
| __ tst(scratch1, Operand(HeapNumber::kSignMask)); |
| DeoptimizeIf(ne, instr->environment()); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoMathRound(LUnaryMathOperation* instr) { |
| DoubleRegister input = ToDoubleRegister(instr->InputAt(0)); |
| Register result = ToRegister(instr->result()); |
| Register scratch1 = scratch0(); |
| Register scratch2 = result; |
| __ EmitVFPTruncate(kRoundToNearest, |
| double_scratch0().low(), |
| input, |
| scratch1, |
| scratch2); |
| DeoptimizeIf(ne, instr->environment()); |
| __ vmov(result, double_scratch0().low()); |
| |
| // Test for -0. |
| Label done; |
| __ cmp(result, Operand(0)); |
| __ b(ne, &done); |
| __ vmov(scratch1, input.high()); |
| __ tst(scratch1, Operand(HeapNumber::kSignMask)); |
| DeoptimizeIf(ne, instr->environment()); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoMathSqrt(LUnaryMathOperation* instr) { |
| DoubleRegister input = ToDoubleRegister(instr->InputAt(0)); |
| ASSERT(ToDoubleRegister(instr->result()).is(input)); |
| __ vsqrt(input, input); |
| } |
| |
| |
| void LCodeGen::DoMathPowHalf(LUnaryMathOperation* instr) { |
| DoubleRegister input = ToDoubleRegister(instr->InputAt(0)); |
| Register scratch = scratch0(); |
| SwVfpRegister single_scratch = double_scratch0().low(); |
| DoubleRegister double_scratch = double_scratch0(); |
| ASSERT(ToDoubleRegister(instr->result()).is(input)); |
| |
| // Add +0 to convert -0 to +0. |
| __ mov(scratch, Operand(0)); |
| __ vmov(single_scratch, scratch); |
| __ vcvt_f64_s32(double_scratch, single_scratch); |
| __ vadd(input, input, double_scratch); |
| __ vsqrt(input, input); |
| } |
| |
| |
| void LCodeGen::DoPower(LPower* instr) { |
| LOperand* left = instr->InputAt(0); |
| LOperand* right = instr->InputAt(1); |
| Register scratch = scratch0(); |
| DoubleRegister result_reg = ToDoubleRegister(instr->result()); |
| Representation exponent_type = instr->hydrogen()->right()->representation(); |
| if (exponent_type.IsDouble()) { |
| // Prepare arguments and call C function. |
| __ PrepareCallCFunction(4, scratch); |
| __ vmov(r0, r1, ToDoubleRegister(left)); |
| __ vmov(r2, r3, ToDoubleRegister(right)); |
| __ CallCFunction(ExternalReference::power_double_double_function(), 4); |
| } else if (exponent_type.IsInteger32()) { |
| ASSERT(ToRegister(right).is(r0)); |
| // Prepare arguments and call C function. |
| __ PrepareCallCFunction(4, scratch); |
| __ mov(r2, ToRegister(right)); |
| __ vmov(r0, r1, ToDoubleRegister(left)); |
| __ CallCFunction(ExternalReference::power_double_int_function(), 4); |
| } else { |
| ASSERT(exponent_type.IsTagged()); |
| ASSERT(instr->hydrogen()->left()->representation().IsDouble()); |
| |
| Register right_reg = ToRegister(right); |
| |
| // Check for smi on the right hand side. |
| Label non_smi, call; |
| __ JumpIfNotSmi(right_reg, &non_smi); |
| |
| // Untag smi and convert it to a double. |
| __ SmiUntag(right_reg); |
| SwVfpRegister single_scratch = double_scratch0().low(); |
| __ vmov(single_scratch, right_reg); |
| __ vcvt_f64_s32(result_reg, single_scratch); |
| __ jmp(&call); |
| |
| // Heap number map check. |
| __ bind(&non_smi); |
| __ ldr(scratch, FieldMemOperand(right_reg, HeapObject::kMapOffset)); |
| __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex); |
| __ cmp(scratch, Operand(ip)); |
| DeoptimizeIf(ne, instr->environment()); |
| int32_t value_offset = HeapNumber::kValueOffset - kHeapObjectTag; |
| __ add(scratch, right_reg, Operand(value_offset)); |
| __ vldr(result_reg, scratch, 0); |
| |
| // Prepare arguments and call C function. |
| __ bind(&call); |
| __ PrepareCallCFunction(4, scratch); |
| __ vmov(r0, r1, ToDoubleRegister(left)); |
| __ vmov(r2, r3, result_reg); |
| __ CallCFunction(ExternalReference::power_double_double_function(), 4); |
| } |
| // Store the result in the result register. |
| __ GetCFunctionDoubleResult(result_reg); |
| } |
| |
| |
| void LCodeGen::DoMathLog(LUnaryMathOperation* instr) { |
| ASSERT(ToDoubleRegister(instr->result()).is(d2)); |
| TranscendentalCacheStub stub(TranscendentalCache::LOG, |
| TranscendentalCacheStub::UNTAGGED); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| void LCodeGen::DoMathCos(LUnaryMathOperation* instr) { |
| ASSERT(ToDoubleRegister(instr->result()).is(d2)); |
| TranscendentalCacheStub stub(TranscendentalCache::COS, |
| TranscendentalCacheStub::UNTAGGED); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| void LCodeGen::DoMathSin(LUnaryMathOperation* instr) { |
| ASSERT(ToDoubleRegister(instr->result()).is(d2)); |
| TranscendentalCacheStub stub(TranscendentalCache::SIN, |
| TranscendentalCacheStub::UNTAGGED); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| void LCodeGen::DoUnaryMathOperation(LUnaryMathOperation* instr) { |
| switch (instr->op()) { |
| case kMathAbs: |
| DoMathAbs(instr); |
| break; |
| case kMathFloor: |
| DoMathFloor(instr); |
| break; |
| case kMathRound: |
| DoMathRound(instr); |
| break; |
| case kMathSqrt: |
| DoMathSqrt(instr); |
| break; |
| case kMathPowHalf: |
| DoMathPowHalf(instr); |
| break; |
| case kMathCos: |
| DoMathCos(instr); |
| break; |
| case kMathSin: |
| DoMathSin(instr); |
| break; |
| case kMathLog: |
| DoMathLog(instr); |
| break; |
| default: |
| Abort("Unimplemented type of LUnaryMathOperation."); |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void LCodeGen::DoCallKeyed(LCallKeyed* instr) { |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| |
| int arity = instr->arity(); |
| Handle<Code> ic = StubCache::ComputeKeyedCallInitialize(arity, NOT_IN_LOOP); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| } |
| |
| |
| void LCodeGen::DoCallNamed(LCallNamed* instr) { |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| |
| int arity = instr->arity(); |
| Handle<Code> ic = StubCache::ComputeCallInitialize(arity, NOT_IN_LOOP); |
| __ mov(r2, Operand(instr->name())); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| // Restore context register. |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| } |
| |
| |
| void LCodeGen::DoCallFunction(LCallFunction* instr) { |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| |
| int arity = instr->arity(); |
| CallFunctionStub stub(arity, NOT_IN_LOOP, RECEIVER_MIGHT_BE_VALUE); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| __ Drop(1); |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| } |
| |
| |
| void LCodeGen::DoCallGlobal(LCallGlobal* instr) { |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| |
| int arity = instr->arity(); |
| Handle<Code> ic = StubCache::ComputeCallInitialize(arity, NOT_IN_LOOP); |
| __ mov(r2, Operand(instr->name())); |
| CallCode(ic, RelocInfo::CODE_TARGET_CONTEXT, instr); |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| } |
| |
| |
| void LCodeGen::DoCallKnownGlobal(LCallKnownGlobal* instr) { |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| __ mov(r1, Operand(instr->target())); |
| CallKnownFunction(instr->target(), instr->arity(), instr); |
| } |
| |
| |
| void LCodeGen::DoCallNew(LCallNew* instr) { |
| ASSERT(ToRegister(instr->InputAt(0)).is(r1)); |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| |
| Handle<Code> builtin(Builtins::builtin(Builtins::JSConstructCall)); |
| __ mov(r0, Operand(instr->arity())); |
| CallCode(builtin, RelocInfo::CONSTRUCT_CALL, instr); |
| } |
| |
| |
| void LCodeGen::DoCallRuntime(LCallRuntime* instr) { |
| CallRuntime(instr->function(), instr->arity(), instr); |
| } |
| |
| |
| void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) { |
| Register object = ToRegister(instr->object()); |
| Register value = ToRegister(instr->value()); |
| Register scratch = scratch0(); |
| int offset = instr->offset(); |
| |
| ASSERT(!object.is(value)); |
| |
| if (!instr->transition().is_null()) { |
| __ mov(scratch, Operand(instr->transition())); |
| __ str(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| } |
| |
| // Do the store. |
| if (instr->is_in_object()) { |
| __ str(value, FieldMemOperand(object, offset)); |
| if (instr->needs_write_barrier()) { |
| // Update the write barrier for the object for in-object properties. |
| __ RecordWrite(object, Operand(offset), value, scratch); |
| } |
| } else { |
| __ ldr(scratch, FieldMemOperand(object, JSObject::kPropertiesOffset)); |
| __ str(value, FieldMemOperand(scratch, offset)); |
| if (instr->needs_write_barrier()) { |
| // Update the write barrier for the properties array. |
| // object is used as a scratch register. |
| __ RecordWrite(scratch, Operand(offset), value, object); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoStoreNamedGeneric(LStoreNamedGeneric* instr) { |
| ASSERT(ToRegister(instr->object()).is(r1)); |
| ASSERT(ToRegister(instr->value()).is(r0)); |
| |
| // Name is always in r2. |
| __ mov(r2, Operand(instr->name())); |
| Handle<Code> ic(Builtins::builtin( |
| info_->is_strict() ? Builtins::StoreIC_Initialize_Strict |
| : Builtins::StoreIC_Initialize)); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| void LCodeGen::DoBoundsCheck(LBoundsCheck* instr) { |
| __ cmp(ToRegister(instr->index()), ToRegister(instr->length())); |
| DeoptimizeIf(hs, instr->environment()); |
| } |
| |
| |
| void LCodeGen::DoStoreKeyedFastElement(LStoreKeyedFastElement* instr) { |
| Register value = ToRegister(instr->value()); |
| Register elements = ToRegister(instr->object()); |
| Register key = instr->key()->IsRegister() ? ToRegister(instr->key()) : no_reg; |
| Register scratch = scratch0(); |
| |
| // Do the store. |
| if (instr->key()->IsConstantOperand()) { |
| ASSERT(!instr->hydrogen()->NeedsWriteBarrier()); |
| LConstantOperand* const_operand = LConstantOperand::cast(instr->key()); |
| int offset = |
| ToInteger32(const_operand) * kPointerSize + FixedArray::kHeaderSize; |
| __ str(value, FieldMemOperand(elements, offset)); |
| } else { |
| __ add(scratch, elements, Operand(key, LSL, kPointerSizeLog2)); |
| __ str(value, FieldMemOperand(scratch, FixedArray::kHeaderSize)); |
| } |
| |
| if (instr->hydrogen()->NeedsWriteBarrier()) { |
| // Compute address of modified element and store it into key register. |
| __ add(key, scratch, Operand(FixedArray::kHeaderSize)); |
| __ RecordWrite(elements, key, value); |
| } |
| } |
| |
| |
| void LCodeGen::DoStorePixelArrayElement(LStorePixelArrayElement* instr) { |
| Register external_pointer = ToRegister(instr->external_pointer()); |
| Register key = ToRegister(instr->key()); |
| Register value = ToRegister(instr->value()); |
| |
| // Clamp the value to [0..255]. |
| __ Usat(value, 8, Operand(value)); |
| __ strb(value, MemOperand(external_pointer, key, LSL, 0)); |
| } |
| |
| |
| void LCodeGen::DoStoreKeyedGeneric(LStoreKeyedGeneric* instr) { |
| ASSERT(ToRegister(instr->object()).is(r2)); |
| ASSERT(ToRegister(instr->key()).is(r1)); |
| ASSERT(ToRegister(instr->value()).is(r0)); |
| |
| Handle<Code> ic(Builtins::builtin( |
| info_->is_strict() ? Builtins::KeyedStoreIC_Initialize_Strict |
| : Builtins::KeyedStoreIC_Initialize)); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| void LCodeGen::DoStringCharCodeAt(LStringCharCodeAt* instr) { |
| class DeferredStringCharCodeAt: public LDeferredCode { |
| public: |
| DeferredStringCharCodeAt(LCodeGen* codegen, LStringCharCodeAt* instr) |
| : LDeferredCode(codegen), instr_(instr) { } |
| virtual void Generate() { codegen()->DoDeferredStringCharCodeAt(instr_); } |
| private: |
| LStringCharCodeAt* instr_; |
| }; |
| |
| Register scratch = scratch0(); |
| Register string = ToRegister(instr->string()); |
| Register index = no_reg; |
| int const_index = -1; |
| if (instr->index()->IsConstantOperand()) { |
| const_index = ToInteger32(LConstantOperand::cast(instr->index())); |
| STATIC_ASSERT(String::kMaxLength <= Smi::kMaxValue); |
| if (!Smi::IsValid(const_index)) { |
| // Guaranteed to be out of bounds because of the assert above. |
| // So the bounds check that must dominate this instruction must |
| // have deoptimized already. |
| if (FLAG_debug_code) { |
| __ Abort("StringCharCodeAt: out of bounds index."); |
| } |
| // No code needs to be generated. |
| return; |
| } |
| } else { |
| index = ToRegister(instr->index()); |
| } |
| Register result = ToRegister(instr->result()); |
| |
| DeferredStringCharCodeAt* deferred = |
| new DeferredStringCharCodeAt(this, instr); |
| |
| Label flat_string, ascii_string, done; |
| |
| // Fetch the instance type of the receiver into result register. |
| __ ldr(result, FieldMemOperand(string, HeapObject::kMapOffset)); |
| __ ldrb(result, FieldMemOperand(result, Map::kInstanceTypeOffset)); |
| |
| // We need special handling for non-flat strings. |
| STATIC_ASSERT(kSeqStringTag == 0); |
| __ tst(result, Operand(kStringRepresentationMask)); |
| __ b(eq, &flat_string); |
| |
| // Handle non-flat strings. |
| __ tst(result, Operand(kIsConsStringMask)); |
| __ b(eq, deferred->entry()); |
| |
| // ConsString. |
| // Check whether the right hand side is the empty string (i.e. if |
| // this is really a flat string in a cons string). If that is not |
| // the case we would rather go to the runtime system now to flatten |
| // the string. |
| __ ldr(scratch, FieldMemOperand(string, ConsString::kSecondOffset)); |
| __ LoadRoot(ip, Heap::kEmptyStringRootIndex); |
| __ cmp(scratch, ip); |
| __ b(ne, deferred->entry()); |
| // Get the first of the two strings and load its instance type. |
| __ ldr(string, FieldMemOperand(string, ConsString::kFirstOffset)); |
| __ ldr(result, FieldMemOperand(string, HeapObject::kMapOffset)); |
| __ ldrb(result, FieldMemOperand(result, Map::kInstanceTypeOffset)); |
| // If the first cons component is also non-flat, then go to runtime. |
| STATIC_ASSERT(kSeqStringTag == 0); |
| __ tst(result, Operand(kStringRepresentationMask)); |
| __ b(ne, deferred->entry()); |
| |
| // Check for 1-byte or 2-byte string. |
| __ bind(&flat_string); |
| STATIC_ASSERT(kAsciiStringTag != 0); |
| __ tst(result, Operand(kStringEncodingMask)); |
| __ b(ne, &ascii_string); |
| |
| // 2-byte string. |
| // Load the 2-byte character code into the result register. |
| STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize == 1); |
| if (instr->index()->IsConstantOperand()) { |
| __ ldrh(result, |
| FieldMemOperand(string, |
| SeqTwoByteString::kHeaderSize + 2 * const_index)); |
| } else { |
| __ add(scratch, |
| string, |
| Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| __ ldrh(result, MemOperand(scratch, index, LSL, 1)); |
| } |
| __ jmp(&done); |
| |
| // ASCII string. |
| // Load the byte into the result register. |
| __ bind(&ascii_string); |
| if (instr->index()->IsConstantOperand()) { |
| __ ldrb(result, FieldMemOperand(string, |
| SeqAsciiString::kHeaderSize + const_index)); |
| } else { |
| __ add(scratch, |
| string, |
| Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| __ ldrb(result, MemOperand(scratch, index)); |
| } |
| __ bind(&done); |
| __ bind(deferred->exit()); |
| } |
| |
| |
| void LCodeGen::DoDeferredStringCharCodeAt(LStringCharCodeAt* instr) { |
| Register string = ToRegister(instr->string()); |
| Register result = ToRegister(instr->result()); |
| Register scratch = scratch0(); |
| |
| // 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. |
| __ mov(result, Operand(0)); |
| |
| __ PushSafepointRegisters(); |
| __ push(string); |
| // Push the index as a smi. This is safe because of the checks in |
| // DoStringCharCodeAt above. |
| if (instr->index()->IsConstantOperand()) { |
| int const_index = ToInteger32(LConstantOperand::cast(instr->index())); |
| __ mov(scratch, Operand(Smi::FromInt(const_index))); |
| __ push(scratch); |
| } else { |
| Register index = ToRegister(instr->index()); |
| __ SmiTag(index); |
| __ push(index); |
| } |
| __ CallRuntimeSaveDoubles(Runtime::kStringCharCodeAt); |
| RecordSafepointWithRegisters( |
| instr->pointer_map(), 2, Safepoint::kNoDeoptimizationIndex); |
| if (FLAG_debug_code) { |
| __ AbortIfNotSmi(r0); |
| } |
| __ SmiUntag(r0); |
| __ StoreToSafepointRegisterSlot(r0, result); |
| __ PopSafepointRegisters(); |
| } |
| |
| |
| void LCodeGen::DoStringCharFromCode(LStringCharFromCode* instr) { |
| class DeferredStringCharFromCode: public LDeferredCode { |
| public: |
| DeferredStringCharFromCode(LCodeGen* codegen, LStringCharFromCode* instr) |
| : LDeferredCode(codegen), instr_(instr) { } |
| virtual void Generate() { codegen()->DoDeferredStringCharFromCode(instr_); } |
| private: |
| LStringCharFromCode* instr_; |
| }; |
| |
| DeferredStringCharFromCode* deferred = |
| new DeferredStringCharFromCode(this, instr); |
| |
| ASSERT(instr->hydrogen()->value()->representation().IsInteger32()); |
| Register char_code = ToRegister(instr->char_code()); |
| Register result = ToRegister(instr->result()); |
| ASSERT(!char_code.is(result)); |
| |
| __ cmp(char_code, Operand(String::kMaxAsciiCharCode)); |
| __ b(hi, deferred->entry()); |
| __ LoadRoot(result, Heap::kSingleCharacterStringCacheRootIndex); |
| __ add(result, result, Operand(char_code, LSL, kPointerSizeLog2)); |
| __ ldr(result, FieldMemOperand(result, FixedArray::kHeaderSize)); |
| __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| __ cmp(result, ip); |
| __ b(eq, 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. |
| __ mov(result, Operand(0)); |
| |
| __ PushSafepointRegisters(); |
| __ SmiTag(char_code); |
| __ push(char_code); |
| __ CallRuntimeSaveDoubles(Runtime::kCharFromCode); |
| RecordSafepointWithRegisters( |
| instr->pointer_map(), 1, Safepoint::kNoDeoptimizationIndex); |
| __ StoreToSafepointRegisterSlot(r0, result); |
| __ PopSafepointRegisters(); |
| } |
| |
| |
| void LCodeGen::DoStringLength(LStringLength* instr) { |
| Register string = ToRegister(instr->InputAt(0)); |
| Register result = ToRegister(instr->result()); |
| __ ldr(result, FieldMemOperand(string, String::kLengthOffset)); |
| } |
| |
| |
| void LCodeGen::DoInteger32ToDouble(LInteger32ToDouble* instr) { |
| LOperand* input = instr->InputAt(0); |
| ASSERT(input->IsRegister() || input->IsStackSlot()); |
| LOperand* output = instr->result(); |
| ASSERT(output->IsDoubleRegister()); |
| SwVfpRegister single_scratch = double_scratch0().low(); |
| if (input->IsStackSlot()) { |
| Register scratch = scratch0(); |
| __ ldr(scratch, ToMemOperand(input)); |
| __ vmov(single_scratch, scratch); |
| } else { |
| __ vmov(single_scratch, ToRegister(input)); |
| } |
| __ vcvt_f64_s32(ToDoubleRegister(output), single_scratch); |
| } |
| |
| |
| void LCodeGen::DoNumberTagI(LNumberTagI* instr) { |
| class DeferredNumberTagI: public LDeferredCode { |
| public: |
| DeferredNumberTagI(LCodeGen* codegen, LNumberTagI* instr) |
| : LDeferredCode(codegen), instr_(instr) { } |
| virtual void Generate() { codegen()->DoDeferredNumberTagI(instr_); } |
| private: |
| LNumberTagI* instr_; |
| }; |
| |
| LOperand* input = instr->InputAt(0); |
| ASSERT(input->IsRegister() && input->Equals(instr->result())); |
| Register reg = ToRegister(input); |
| |
| DeferredNumberTagI* deferred = new DeferredNumberTagI(this, instr); |
| __ SmiTag(reg, SetCC); |
| __ b(vs, deferred->entry()); |
| __ bind(deferred->exit()); |
| } |
| |
| |
| void LCodeGen::DoDeferredNumberTagI(LNumberTagI* instr) { |
| Label slow; |
| Register reg = ToRegister(instr->InputAt(0)); |
| DoubleRegister dbl_scratch = d0; |
| SwVfpRegister flt_scratch = s0; |
| |
| // Preserve the value of all registers. |
| __ PushSafepointRegisters(); |
| |
| // 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. |
| Label done; |
| __ SmiUntag(reg); |
| __ eor(reg, reg, Operand(0x80000000)); |
| __ vmov(flt_scratch, reg); |
| __ vcvt_f64_s32(dbl_scratch, flt_scratch); |
| if (FLAG_inline_new) { |
| __ LoadRoot(r6, Heap::kHeapNumberMapRootIndex); |
| __ AllocateHeapNumber(r5, r3, r4, r6, &slow); |
| if (!reg.is(r5)) __ mov(reg, r5); |
| __ b(&done); |
| } |
| |
| // Slow case: Call the runtime system to do the number allocation. |
| __ bind(&slow); |
| |
| // TODO(3095996): 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. |
| __ mov(ip, Operand(0)); |
| __ StoreToSafepointRegisterSlot(ip, reg); |
| __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber); |
| RecordSafepointWithRegisters( |
| instr->pointer_map(), 0, Safepoint::kNoDeoptimizationIndex); |
| if (!reg.is(r0)) __ mov(reg, r0); |
| |
| // Done. Put the value in dbl_scratch into the value of the allocated heap |
| // number. |
| __ bind(&done); |
| __ sub(ip, reg, Operand(kHeapObjectTag)); |
| __ vstr(dbl_scratch, ip, HeapNumber::kValueOffset); |
| __ StoreToSafepointRegisterSlot(reg, reg); |
| __ PopSafepointRegisters(); |
| } |
| |
| |
| void LCodeGen::DoNumberTagD(LNumberTagD* instr) { |
| class DeferredNumberTagD: public LDeferredCode { |
| public: |
| DeferredNumberTagD(LCodeGen* codegen, LNumberTagD* instr) |
| : LDeferredCode(codegen), instr_(instr) { } |
| virtual void Generate() { codegen()->DoDeferredNumberTagD(instr_); } |
| private: |
| LNumberTagD* instr_; |
| }; |
| |
| DoubleRegister input_reg = ToDoubleRegister(instr->InputAt(0)); |
| Register scratch = scratch0(); |
| Register reg = ToRegister(instr->result()); |
| Register temp1 = ToRegister(instr->TempAt(0)); |
| Register temp2 = ToRegister(instr->TempAt(1)); |
| |
| DeferredNumberTagD* deferred = new DeferredNumberTagD(this, instr); |
| if (FLAG_inline_new) { |
| __ LoadRoot(scratch, Heap::kHeapNumberMapRootIndex); |
| __ AllocateHeapNumber(reg, temp1, temp2, scratch, deferred->entry()); |
| } else { |
| __ jmp(deferred->entry()); |
| } |
| __ bind(deferred->exit()); |
| __ sub(ip, reg, Operand(kHeapObjectTag)); |
| __ vstr(input_reg, ip, HeapNumber::kValueOffset); |
| } |
| |
| |
| 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()); |
| __ mov(reg, Operand(0)); |
| |
| __ PushSafepointRegisters(); |
| __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber); |
| RecordSafepointWithRegisters( |
| instr->pointer_map(), 0, Safepoint::kNoDeoptimizationIndex); |
| __ StoreToSafepointRegisterSlot(r0, reg); |
| __ PopSafepointRegisters(); |
| } |
| |
| |
| void LCodeGen::DoSmiTag(LSmiTag* instr) { |
| LOperand* input = instr->InputAt(0); |
| ASSERT(input->IsRegister() && input->Equals(instr->result())); |
| ASSERT(!instr->hydrogen_value()->CheckFlag(HValue::kCanOverflow)); |
| __ SmiTag(ToRegister(input)); |
| } |
| |
| |
| void LCodeGen::DoSmiUntag(LSmiUntag* instr) { |
| LOperand* input = instr->InputAt(0); |
| ASSERT(input->IsRegister() && input->Equals(instr->result())); |
| if (instr->needs_check()) { |
| __ tst(ToRegister(input), Operand(kSmiTagMask)); |
| DeoptimizeIf(ne, instr->environment()); |
| } |
| __ SmiUntag(ToRegister(input)); |
| } |
| |
| |
| void LCodeGen::EmitNumberUntagD(Register input_reg, |
| DoubleRegister result_reg, |
| LEnvironment* env) { |
| Register scratch = scratch0(); |
| SwVfpRegister flt_scratch = s0; |
| ASSERT(!result_reg.is(d0)); |
| |
| Label load_smi, heap_number, done; |
| |
| // Smi check. |
| __ tst(input_reg, Operand(kSmiTagMask)); |
| __ b(eq, &load_smi); |
| |
| // Heap number map check. |
| __ ldr(scratch, FieldMemOperand(input_reg, HeapObject::kMapOffset)); |
| __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex); |
| __ cmp(scratch, Operand(ip)); |
| __ b(eq, &heap_number); |
| |
| __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| __ cmp(input_reg, Operand(ip)); |
| DeoptimizeIf(ne, env); |
| |
| // Convert undefined to NaN. |
| __ LoadRoot(ip, Heap::kNanValueRootIndex); |
| __ sub(ip, ip, Operand(kHeapObjectTag)); |
| __ vldr(result_reg, ip, HeapNumber::kValueOffset); |
| __ jmp(&done); |
| |
| // Heap number to double register conversion. |
| __ bind(&heap_number); |
| __ sub(ip, input_reg, Operand(kHeapObjectTag)); |
| __ vldr(result_reg, ip, HeapNumber::kValueOffset); |
| __ jmp(&done); |
| |
| // Smi to double register conversion |
| __ bind(&load_smi); |
| __ SmiUntag(input_reg); // Untag smi before converting to float. |
| __ vmov(flt_scratch, input_reg); |
| __ vcvt_f64_s32(result_reg, flt_scratch); |
| __ SmiTag(input_reg); // Retag smi. |
| __ bind(&done); |
| } |
| |
| |
| class DeferredTaggedToI: public LDeferredCode { |
| public: |
| DeferredTaggedToI(LCodeGen* codegen, LTaggedToI* instr) |
| : LDeferredCode(codegen), instr_(instr) { } |
| virtual void Generate() { codegen()->DoDeferredTaggedToI(instr_); } |
| private: |
| LTaggedToI* instr_; |
| }; |
| |
| |
| void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr) { |
| Register input_reg = ToRegister(instr->InputAt(0)); |
| Register scratch1 = scratch0(); |
| Register scratch2 = ToRegister(instr->TempAt(0)); |
| DwVfpRegister double_scratch = double_scratch0(); |
| SwVfpRegister single_scratch = double_scratch.low(); |
| |
| ASSERT(!scratch1.is(input_reg) && !scratch1.is(scratch2)); |
| ASSERT(!scratch2.is(input_reg) && !scratch2.is(scratch1)); |
| |
| Label done; |
| |
| // Heap number map check. |
| __ ldr(scratch1, FieldMemOperand(input_reg, HeapObject::kMapOffset)); |
| __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex); |
| __ cmp(scratch1, Operand(ip)); |
| |
| if (instr->truncating()) { |
| Register scratch3 = ToRegister(instr->TempAt(1)); |
| DwVfpRegister double_scratch2 = ToDoubleRegister(instr->TempAt(2)); |
| ASSERT(!scratch3.is(input_reg) && |
| !scratch3.is(scratch1) && |
| !scratch3.is(scratch2)); |
| // Performs a truncating conversion of a floating point number as used by |
| // the JS bitwise operations. |
| Label heap_number; |
| __ b(eq, &heap_number); |
| // Check for undefined. Undefined is converted to zero for truncating |
| // conversions. |
| __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| __ cmp(input_reg, Operand(ip)); |
| DeoptimizeIf(ne, instr->environment()); |
| __ mov(input_reg, Operand(0)); |
| __ b(&done); |
| |
| __ bind(&heap_number); |
| __ sub(scratch1, input_reg, Operand(kHeapObjectTag)); |
| __ vldr(double_scratch2, scratch1, HeapNumber::kValueOffset); |
| |
| __ EmitECMATruncate(input_reg, |
| double_scratch2, |
| single_scratch, |
| scratch1, |
| scratch2, |
| scratch3); |
| |
| } else { |
| CpuFeatures::Scope scope(VFP3); |
| // Deoptimize if we don't have a heap number. |
| DeoptimizeIf(ne, instr->environment()); |
| |
| __ sub(ip, input_reg, Operand(kHeapObjectTag)); |
| __ vldr(double_scratch, ip, HeapNumber::kValueOffset); |
| __ EmitVFPTruncate(kRoundToZero, |
| single_scratch, |
| double_scratch, |
| scratch1, |
| scratch2, |
| kCheckForInexactConversion); |
| DeoptimizeIf(ne, instr->environment()); |
| // Load the result. |
| __ vmov(input_reg, single_scratch); |
| |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| __ cmp(input_reg, Operand(0)); |
| __ b(ne, &done); |
| __ vmov(scratch1, double_scratch.high()); |
| __ tst(scratch1, Operand(HeapNumber::kSignMask)); |
| DeoptimizeIf(ne, instr->environment()); |
| } |
| } |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoTaggedToI(LTaggedToI* instr) { |
| LOperand* input = instr->InputAt(0); |
| ASSERT(input->IsRegister()); |
| ASSERT(input->Equals(instr->result())); |
| |
| Register input_reg = ToRegister(input); |
| |
| DeferredTaggedToI* deferred = new DeferredTaggedToI(this, instr); |
| |
| // Smi check. |
| __ tst(input_reg, Operand(kSmiTagMask)); |
| __ b(ne, deferred->entry()); |
| |
| // Smi to int32 conversion |
| __ SmiUntag(input_reg); // Untag smi. |
| |
| __ bind(deferred->exit()); |
| } |
| |
| |
| void LCodeGen::DoNumberUntagD(LNumberUntagD* instr) { |
| LOperand* input = instr->InputAt(0); |
| ASSERT(input->IsRegister()); |
| LOperand* result = instr->result(); |
| ASSERT(result->IsDoubleRegister()); |
| |
| Register input_reg = ToRegister(input); |
| DoubleRegister result_reg = ToDoubleRegister(result); |
| |
| EmitNumberUntagD(input_reg, result_reg, instr->environment()); |
| } |
| |
| |
| void LCodeGen::DoDoubleToI(LDoubleToI* instr) { |
| Register result_reg = ToRegister(instr->result()); |
| Register scratch1 = scratch0(); |
| Register scratch2 = ToRegister(instr->TempAt(0)); |
| DwVfpRegister double_input = ToDoubleRegister(instr->InputAt(0)); |
| DwVfpRegister double_scratch = double_scratch0(); |
| SwVfpRegister single_scratch = double_scratch0().low(); |
| |
| Label done; |
| |
| if (instr->truncating()) { |
| Register scratch3 = ToRegister(instr->TempAt(1)); |
| __ EmitECMATruncate(result_reg, |
| double_input, |
| single_scratch, |
| scratch1, |
| scratch2, |
| scratch3); |
| } else { |
| VFPRoundingMode rounding_mode = kRoundToMinusInf; |
| __ EmitVFPTruncate(rounding_mode, |
| single_scratch, |
| double_input, |
| scratch1, |
| scratch2, |
| kCheckForInexactConversion); |
| // Deoptimize if we had a vfp invalid exception, |
| // including inexact operation. |
| DeoptimizeIf(ne, instr->environment()); |
| // Retrieve the result. |
| __ vmov(result_reg, single_scratch); |
| } |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoCheckSmi(LCheckSmi* instr) { |
| LOperand* input = instr->InputAt(0); |
| __ tst(ToRegister(input), Operand(kSmiTagMask)); |
| DeoptimizeIf(ne, instr->environment()); |
| } |
| |
| |
| void LCodeGen::DoCheckNonSmi(LCheckNonSmi* instr) { |
| LOperand* input = instr->InputAt(0); |
| __ tst(ToRegister(input), Operand(kSmiTagMask)); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| |
| |
| void LCodeGen::DoCheckInstanceType(LCheckInstanceType* instr) { |
| Register input = ToRegister(instr->InputAt(0)); |
| Register scratch = scratch0(); |
| InstanceType first = instr->hydrogen()->first(); |
| InstanceType last = instr->hydrogen()->last(); |
| |
| __ ldr(scratch, FieldMemOperand(input, HeapObject::kMapOffset)); |
| __ ldrb(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| __ cmp(scratch, Operand(first)); |
| |
| // If there is only one type in the interval check for equality. |
| if (first == last) { |
| DeoptimizeIf(ne, instr->environment()); |
| } else { |
| DeoptimizeIf(lo, instr->environment()); |
| // Omit check for the last type. |
| if (last != LAST_TYPE) { |
| __ cmp(scratch, Operand(last)); |
| DeoptimizeIf(hi, instr->environment()); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoCheckFunction(LCheckFunction* instr) { |
| ASSERT(instr->InputAt(0)->IsRegister()); |
| Register reg = ToRegister(instr->InputAt(0)); |
| __ cmp(reg, Operand(instr->hydrogen()->target())); |
| DeoptimizeIf(ne, instr->environment()); |
| } |
| |
| |
| void LCodeGen::DoCheckMap(LCheckMap* instr) { |
| Register scratch = scratch0(); |
| LOperand* input = instr->InputAt(0); |
| ASSERT(input->IsRegister()); |
| Register reg = ToRegister(input); |
| __ ldr(scratch, FieldMemOperand(reg, HeapObject::kMapOffset)); |
| __ cmp(scratch, Operand(instr->hydrogen()->map())); |
| DeoptimizeIf(ne, instr->environment()); |
| } |
| |
| |
| void LCodeGen::LoadHeapObject(Register result, |
| Handle<HeapObject> object) { |
| if (Heap::InNewSpace(*object)) { |
| Handle<JSGlobalPropertyCell> cell = |
| Factory::NewJSGlobalPropertyCell(object); |
| __ mov(result, Operand(cell)); |
| __ ldr(result, FieldMemOperand(result, JSGlobalPropertyCell::kValueOffset)); |
| } else { |
| __ mov(result, Operand(object)); |
| } |
| } |
| |
| |
| void LCodeGen::DoCheckPrototypeMaps(LCheckPrototypeMaps* instr) { |
| Register temp1 = ToRegister(instr->TempAt(0)); |
| Register temp2 = ToRegister(instr->TempAt(1)); |
| |
| Handle<JSObject> holder = instr->holder(); |
| Handle<JSObject> current_prototype = instr->prototype(); |
| |
| // Load prototype object. |
| LoadHeapObject(temp1, current_prototype); |
| |
| // Check prototype maps up to the holder. |
| while (!current_prototype.is_identical_to(holder)) { |
| __ ldr(temp2, FieldMemOperand(temp1, HeapObject::kMapOffset)); |
| __ cmp(temp2, Operand(Handle<Map>(current_prototype->map()))); |
| DeoptimizeIf(ne, instr->environment()); |
| current_prototype = |
| Handle<JSObject>(JSObject::cast(current_prototype->GetPrototype())); |
| // Load next prototype object. |
| LoadHeapObject(temp1, current_prototype); |
| } |
| |
| // Check the holder map. |
| __ ldr(temp2, FieldMemOperand(temp1, HeapObject::kMapOffset)); |
| __ cmp(temp2, Operand(Handle<Map>(current_prototype->map()))); |
| DeoptimizeIf(ne, instr->environment()); |
| } |
| |
| |
| void LCodeGen::DoArrayLiteral(LArrayLiteral* instr) { |
| __ ldr(r3, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| __ ldr(r3, FieldMemOperand(r3, JSFunction::kLiteralsOffset)); |
| __ mov(r2, Operand(Smi::FromInt(instr->hydrogen()->literal_index()))); |
| __ mov(r1, Operand(instr->hydrogen()->constant_elements())); |
| __ Push(r3, r2, r1); |
| |
| // Pick the right runtime function or stub to call. |
| int length = instr->hydrogen()->length(); |
| if (instr->hydrogen()->IsCopyOnWrite()) { |
| ASSERT(instr->hydrogen()->depth() == 1); |
| FastCloneShallowArrayStub::Mode mode = |
| FastCloneShallowArrayStub::COPY_ON_WRITE_ELEMENTS; |
| FastCloneShallowArrayStub stub(mode, length); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| } else if (instr->hydrogen()->depth() > 1) { |
| CallRuntime(Runtime::kCreateArrayLiteral, 3, instr); |
| } else if (length > FastCloneShallowArrayStub::kMaximumClonedLength) { |
| CallRuntime(Runtime::kCreateArrayLiteralShallow, 3, instr); |
| } else { |
| FastCloneShallowArrayStub::Mode mode = |
| FastCloneShallowArrayStub::CLONE_ELEMENTS; |
| FastCloneShallowArrayStub stub(mode, length); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| } |
| } |
| |
| |
| void LCodeGen::DoObjectLiteral(LObjectLiteral* instr) { |
| __ ldr(r4, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| __ ldr(r4, FieldMemOperand(r4, JSFunction::kLiteralsOffset)); |
| __ mov(r3, Operand(Smi::FromInt(instr->hydrogen()->literal_index()))); |
| __ mov(r2, Operand(instr->hydrogen()->constant_properties())); |
| __ mov(r1, Operand(Smi::FromInt(instr->hydrogen()->fast_elements() ? 1 : 0))); |
| __ Push(r4, r3, r2, r1); |
| |
| // Pick the right runtime function to call. |
| if (instr->hydrogen()->depth() > 1) { |
| CallRuntime(Runtime::kCreateObjectLiteral, 4, instr); |
| } else { |
| CallRuntime(Runtime::kCreateObjectLiteralShallow, 4, instr); |
| } |
| } |
| |
| |
| void LCodeGen::DoRegExpLiteral(LRegExpLiteral* instr) { |
| Label materialized; |
| // Registers will be used as follows: |
| // r3 = JS function. |
| // r7 = literals array. |
| // r1 = regexp literal. |
| // r0 = regexp literal clone. |
| // r2 and r4-r6 are used as temporaries. |
| __ ldr(r3, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| __ ldr(r7, FieldMemOperand(r3, JSFunction::kLiteralsOffset)); |
| int literal_offset = FixedArray::kHeaderSize + |
| instr->hydrogen()->literal_index() * kPointerSize; |
| __ ldr(r1, FieldMemOperand(r7, literal_offset)); |
| __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| __ cmp(r1, ip); |
| __ b(ne, &materialized); |
| |
| // Create regexp literal using runtime function |
| // Result will be in r0. |
| __ mov(r6, Operand(Smi::FromInt(instr->hydrogen()->literal_index()))); |
| __ mov(r5, Operand(instr->hydrogen()->pattern())); |
| __ mov(r4, Operand(instr->hydrogen()->flags())); |
| __ Push(r7, r6, r5, r4); |
| CallRuntime(Runtime::kMaterializeRegExpLiteral, 4, instr); |
| __ mov(r1, r0); |
| |
| __ bind(&materialized); |
| int size = JSRegExp::kSize + JSRegExp::kInObjectFieldCount * kPointerSize; |
| Label allocated, runtime_allocate; |
| |
| __ AllocateInNewSpace(size, r0, r2, r3, &runtime_allocate, TAG_OBJECT); |
| __ jmp(&allocated); |
| |
| __ bind(&runtime_allocate); |
| __ mov(r0, Operand(Smi::FromInt(size))); |
| __ Push(r1, r0); |
| CallRuntime(Runtime::kAllocateInNewSpace, 1, instr); |
| __ pop(r1); |
| |
| __ 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) { |
| __ ldr(r3, FieldMemOperand(r1, i)); |
| __ ldr(r2, FieldMemOperand(r1, i + kPointerSize)); |
| __ str(r3, FieldMemOperand(r0, i)); |
| __ str(r2, FieldMemOperand(r0, i + kPointerSize)); |
| } |
| if ((size % (2 * kPointerSize)) != 0) { |
| __ ldr(r3, FieldMemOperand(r1, size - kPointerSize)); |
| __ str(r3, FieldMemOperand(r0, size - kPointerSize)); |
| } |
| } |
| |
| |
| void LCodeGen::DoFunctionLiteral(LFunctionLiteral* instr) { |
| // Use the fast case closure allocation code that allocates in new |
| // space for nested functions that don't need literals cloning. |
| Handle<SharedFunctionInfo> shared_info = instr->shared_info(); |
| bool pretenure = instr->hydrogen()->pretenure(); |
| if (shared_info->num_literals() == 0 && !pretenure) { |
| FastNewClosureStub stub; |
| __ mov(r1, Operand(shared_info)); |
| __ push(r1); |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| } else { |
| __ mov(r2, Operand(shared_info)); |
| __ mov(r1, Operand(pretenure |
| ? Factory::true_value() |
| : Factory::false_value())); |
| __ Push(cp, r2, r1); |
| CallRuntime(Runtime::kNewClosure, 3, instr); |
| } |
| } |
| |
| |
| void LCodeGen::DoTypeof(LTypeof* instr) { |
| Register input = ToRegister(instr->InputAt(0)); |
| __ push(input); |
| CallRuntime(Runtime::kTypeof, 1, instr); |
| } |
| |
| |
| void LCodeGen::DoTypeofIs(LTypeofIs* instr) { |
| Register input = ToRegister(instr->InputAt(0)); |
| Register result = ToRegister(instr->result()); |
| Label true_label; |
| Label false_label; |
| Label done; |
| |
| Condition final_branch_condition = EmitTypeofIs(&true_label, |
| &false_label, |
| input, |
| instr->type_literal()); |
| __ b(final_branch_condition, &true_label); |
| __ bind(&false_label); |
| __ LoadRoot(result, Heap::kFalseValueRootIndex); |
| __ b(&done); |
| |
| __ bind(&true_label); |
| __ LoadRoot(result, Heap::kTrueValueRootIndex); |
| |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoTypeofIsAndBranch(LTypeofIsAndBranch* instr) { |
| Register input = ToRegister(instr->InputAt(0)); |
| int true_block = chunk_->LookupDestination(instr->true_block_id()); |
| int false_block = chunk_->LookupDestination(instr->false_block_id()); |
| Label* true_label = chunk_->GetAssemblyLabel(true_block); |
| Label* false_label = chunk_->GetAssemblyLabel(false_block); |
| |
| Condition final_branch_condition = EmitTypeofIs(true_label, |
| false_label, |
| input, |
| instr->type_literal()); |
| |
| EmitBranch(true_block, false_block, final_branch_condition); |
| } |
| |
| |
| Condition LCodeGen::EmitTypeofIs(Label* true_label, |
| Label* false_label, |
| Register input, |
| Handle<String> type_name) { |
| Condition final_branch_condition = kNoCondition; |
| Register scratch = scratch0(); |
| if (type_name->Equals(Heap::number_symbol())) { |
| __ JumpIfSmi(input, true_label); |
| __ ldr(input, FieldMemOperand(input, HeapObject::kMapOffset)); |
| __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex); |
| __ cmp(input, Operand(ip)); |
| final_branch_condition = eq; |
| |
| } else if (type_name->Equals(Heap::string_symbol())) { |
| __ JumpIfSmi(input, false_label); |
| __ CompareObjectType(input, input, scratch, FIRST_NONSTRING_TYPE); |
| __ b(ge, false_label); |
| __ ldrb(ip, FieldMemOperand(input, Map::kBitFieldOffset)); |
| __ tst(ip, Operand(1 << Map::kIsUndetectable)); |
| final_branch_condition = eq; |
| |
| } else if (type_name->Equals(Heap::boolean_symbol())) { |
| __ CompareRoot(input, Heap::kTrueValueRootIndex); |
| __ b(eq, true_label); |
| __ CompareRoot(input, Heap::kFalseValueRootIndex); |
| final_branch_condition = eq; |
| |
| } else if (type_name->Equals(Heap::undefined_symbol())) { |
| __ CompareRoot(input, Heap::kUndefinedValueRootIndex); |
| __ b(eq, true_label); |
| __ JumpIfSmi(input, false_label); |
| // Check for undetectable objects => true. |
| __ ldr(input, FieldMemOperand(input, HeapObject::kMapOffset)); |
| __ ldrb(ip, FieldMemOperand(input, Map::kBitFieldOffset)); |
| __ tst(ip, Operand(1 << Map::kIsUndetectable)); |
| final_branch_condition = ne; |
| |
| } else if (type_name->Equals(Heap::function_symbol())) { |
| __ JumpIfSmi(input, false_label); |
| __ CompareObjectType(input, input, scratch, FIRST_FUNCTION_CLASS_TYPE); |
| final_branch_condition = ge; |
| |
| } else if (type_name->Equals(Heap::object_symbol())) { |
| __ JumpIfSmi(input, false_label); |
| __ CompareRoot(input, Heap::kNullValueRootIndex); |
| __ b(eq, true_label); |
| __ CompareObjectType(input, input, scratch, FIRST_JS_OBJECT_TYPE); |
| __ b(lo, false_label); |
| __ CompareInstanceType(input, scratch, FIRST_FUNCTION_CLASS_TYPE); |
| __ b(hs, false_label); |
| // Check for undetectable objects => false. |
| __ ldrb(ip, FieldMemOperand(input, Map::kBitFieldOffset)); |
| __ tst(ip, Operand(1 << Map::kIsUndetectable)); |
| final_branch_condition = eq; |
| |
| } else { |
| final_branch_condition = ne; |
| __ b(false_label); |
| // A dead branch instruction will be generated after this point. |
| } |
| |
| return final_branch_condition; |
| } |
| |
| |
| void LCodeGen::DoIsConstructCall(LIsConstructCall* instr) { |
| Register result = ToRegister(instr->result()); |
| Label true_label; |
| Label false_label; |
| Label done; |
| |
| EmitIsConstructCall(result, scratch0()); |
| __ b(eq, &true_label); |
| |
| __ LoadRoot(result, Heap::kFalseValueRootIndex); |
| __ b(&done); |
| |
| |
| __ bind(&true_label); |
| __ LoadRoot(result, Heap::kTrueValueRootIndex); |
| |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoIsConstructCallAndBranch(LIsConstructCallAndBranch* instr) { |
| Register temp1 = ToRegister(instr->TempAt(0)); |
| int true_block = chunk_->LookupDestination(instr->true_block_id()); |
| int false_block = chunk_->LookupDestination(instr->false_block_id()); |
| |
| EmitIsConstructCall(temp1, scratch0()); |
| EmitBranch(true_block, false_block, eq); |
| } |
| |
| |
| void LCodeGen::EmitIsConstructCall(Register temp1, Register temp2) { |
| ASSERT(!temp1.is(temp2)); |
| // Get the frame pointer for the calling frame. |
| __ ldr(temp1, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| |
| // Skip the arguments adaptor frame if it exists. |
| Label check_frame_marker; |
| __ ldr(temp2, MemOperand(temp1, StandardFrameConstants::kContextOffset)); |
| __ cmp(temp2, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| __ b(ne, &check_frame_marker); |
| __ ldr(temp1, MemOperand(temp1, StandardFrameConstants::kCallerFPOffset)); |
| |
| // Check the marker in the calling frame. |
| __ bind(&check_frame_marker); |
| __ ldr(temp1, MemOperand(temp1, StandardFrameConstants::kMarkerOffset)); |
| __ cmp(temp1, Operand(Smi::FromInt(StackFrame::CONSTRUCT))); |
| } |
| |
| |
| void LCodeGen::DoLazyBailout(LLazyBailout* instr) { |
| // No code for lazy bailout instruction. Used to capture environment after a |
| // call for populating the safepoint data with deoptimization data. |
| } |
| |
| |
| void LCodeGen::DoDeoptimize(LDeoptimize* instr) { |
| DeoptimizeIf(al, instr->environment()); |
| } |
| |
| |
| void LCodeGen::DoDeleteProperty(LDeleteProperty* instr) { |
| Register object = ToRegister(instr->object()); |
| Register key = ToRegister(instr->key()); |
| Register strict = scratch0(); |
| __ mov(strict, Operand(Smi::FromInt(strict_mode_flag()))); |
| __ Push(object, key, strict); |
| ASSERT(instr->HasPointerMap() && instr->HasDeoptimizationEnvironment()); |
| LPointerMap* pointers = instr->pointer_map(); |
| LEnvironment* env = instr->deoptimization_environment(); |
| RecordPosition(pointers->position()); |
| RegisterEnvironmentForDeoptimization(env); |
| SafepointGenerator safepoint_generator(this, |
| pointers, |
| env->deoptimization_index()); |
| __ InvokeBuiltin(Builtins::DELETE, CALL_JS, &safepoint_generator); |
| } |
| |
| |
| void LCodeGen::DoStackCheck(LStackCheck* instr) { |
| // Perform stack overflow check. |
| Label ok; |
| __ LoadRoot(ip, Heap::kStackLimitRootIndex); |
| __ cmp(sp, Operand(ip)); |
| __ b(hs, &ok); |
| StackCheckStub stub; |
| CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr); |
| __ bind(&ok); |
| } |
| |
| |
| 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(); |
| environment->SetSpilledRegisters(instr->SpilledRegisterArray(), |
| instr->SpilledDoubleRegisterArray()); |
| |
| // If the environment were already registered, we would have no way of |
| // backpatching it with the spill slot operands. |
| ASSERT(!environment->HasBeenRegistered()); |
| RegisterEnvironmentForDeoptimization(environment); |
| ASSERT(osr_pc_offset_ == -1); |
| osr_pc_offset_ = masm()->pc_offset(); |
| } |
| |
| |
| #undef __ |
| |
| } } // namespace v8::internal |