| // Copyright 2012 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 "v8.h" |
| |
| #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, |
| Safepoint::DeoptMode mode) |
| : codegen_(codegen), |
| pointers_(pointers), |
| deopt_mode_(mode) { } |
| virtual ~SafepointGenerator() { } |
| |
| virtual void BeforeCall(int call_size) const { } |
| |
| virtual void AfterCall() const { |
| codegen_->RecordSafepoint(pointers_, deopt_mode_); |
| } |
| |
| private: |
| LCodeGen* codegen_; |
| LPointerMap* pointers_; |
| Safepoint::DeoptMode deopt_mode_; |
| }; |
| |
| |
| #define __ masm()-> |
| |
| bool LCodeGen::GenerateCode() { |
| HPhase phase("Z_Code generation", chunk()); |
| ASSERT(is_unused()); |
| status_ = GENERATING; |
| |
| // Open a frame scope to indicate that there is a frame on the stack. The |
| // NONE indicates that the scope shouldn't actually generate code to set up |
| // the frame (that is done in GeneratePrologue). |
| FrameScope frame_scope(masm_, StackFrame::NONE); |
| |
| return GeneratePrologue() && |
| GenerateBody() && |
| GenerateDeferredCode() && |
| GenerateDeoptJumpTable() && |
| GenerateSafepointTable(); |
| } |
| |
| |
| void LCodeGen::FinishCode(Handle<Code> code) { |
| ASSERT(is_done()); |
| code->set_stack_slots(GetStackSlotCount()); |
| code->set_safepoint_table_offset(safepoints_.GetCodeOffset()); |
| if (FLAG_weak_embedded_maps_in_optimized_code) { |
| RegisterDependentCodeForEmbeddedMaps(code); |
| } |
| PopulateDeoptimizationData(code); |
| info()->CommitDependentMaps(code); |
| } |
| |
| |
| void LCodeGen::Abort(const char* reason) { |
| info()->set_bailout_reason(reason); |
| 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); |
| OS::MemCopy(copy.start(), builder.Finalize(), copy.length()); |
| masm()->RecordComment(copy.start()); |
| } |
| |
| |
| bool LCodeGen::GeneratePrologue() { |
| ASSERT(is_generating()); |
| |
| if (info()->IsOptimizing()) { |
| ProfileEntryHookStub::MaybeCallEntryHook(masm_); |
| |
| #ifdef DEBUG |
| if (strlen(FLAG_stop_at) > 0 && |
| info_->function()->name()->IsUtf8EqualTo(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. |
| |
| // Strict mode functions and builtins need to replace the receiver |
| // with undefined when called as functions (without an explicit |
| // receiver object). r5 is zero for method calls and non-zero for |
| // function calls. |
| if (!info_->is_classic_mode() || info_->is_native()) { |
| Label ok; |
| __ cmp(r5, Operand::Zero()); |
| __ b(eq, &ok); |
| int receiver_offset = scope()->num_parameters() * kPointerSize; |
| __ LoadRoot(r2, Heap::kUndefinedValueRootIndex); |
| __ str(r2, MemOperand(sp, receiver_offset)); |
| __ bind(&ok); |
| } |
| } |
| |
| info()->set_prologue_offset(masm_->pc_offset()); |
| if (NeedsEagerFrame()) { |
| if (info()->IsStub()) { |
| __ stm(db_w, sp, cp.bit() | fp.bit() | lr.bit()); |
| __ Push(Smi::FromInt(StackFrame::STUB)); |
| // Adjust FP to point to saved FP. |
| __ add(fp, sp, Operand(2 * kPointerSize)); |
| } else { |
| PredictableCodeSizeScope predictible_code_size_scope( |
| masm_, kNoCodeAgeSequenceLength * Assembler::kInstrSize); |
| // The following three instructions must remain together and unmodified |
| // for code aging to work properly. |
| __ stm(db_w, sp, r1.bit() | cp.bit() | fp.bit() | lr.bit()); |
| // Load undefined value here, so the value is ready for the loop |
| // below. |
| __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| // Adjust FP to point to saved FP. |
| __ add(fp, sp, Operand(2 * kPointerSize)); |
| } |
| frame_is_built_ = true; |
| info_->AddNoFrameRange(0, masm_->pc_offset()); |
| } |
| |
| // Reserve space for the stack slots needed by the code. |
| int slots = GetStackSlotCount(); |
| if (slots > 0) { |
| if (FLAG_debug_code) { |
| __ sub(sp, sp, Operand(slots * kPointerSize)); |
| __ push(r0); |
| __ push(r1); |
| __ add(r0, sp, Operand(slots * kPointerSize)); |
| __ mov(r1, Operand(kSlotsZapValue)); |
| Label loop; |
| __ bind(&loop); |
| __ sub(r0, r0, Operand(kPointerSize)); |
| __ str(r1, MemOperand(r0, 2 * kPointerSize)); |
| __ cmp(r0, sp); |
| __ b(ne, &loop); |
| __ pop(r1); |
| __ pop(r0); |
| } else { |
| __ sub(sp, sp, Operand(slots * kPointerSize)); |
| } |
| } |
| |
| if (info()->saves_caller_doubles()) { |
| Comment(";;; Save clobbered callee double registers"); |
| int count = 0; |
| BitVector* doubles = chunk()->allocated_double_registers(); |
| BitVector::Iterator save_iterator(doubles); |
| while (!save_iterator.Done()) { |
| __ vstr(DwVfpRegister::FromAllocationIndex(save_iterator.Current()), |
| MemOperand(sp, count * kDoubleSize)); |
| save_iterator.Advance(); |
| count++; |
| } |
| } |
| |
| // Possibly allocate a local context. |
| int heap_slots = info()->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::kNewFunctionContext, 1); |
| } |
| RecordSafepoint(Safepoint::kNoLazyDeopt); |
| // 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++) { |
| Variable* var = scope()->parameter(i); |
| if (var->IsContextSlot()) { |
| 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. |
| MemOperand target = ContextOperand(cp, var->index()); |
| __ str(r0, target); |
| // Update the write barrier. This clobbers r3 and r0. |
| __ RecordWriteContextSlot( |
| cp, |
| target.offset(), |
| r0, |
| r3, |
| GetLinkRegisterState(), |
| kSaveFPRegs); |
| } |
| } |
| Comment(";;; End allocate local context"); |
| } |
| |
| // Trace the call. |
| if (FLAG_trace && info()->IsOptimizing()) { |
| __ 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_); |
| |
| // Don't emit code for basic blocks with a replacement. |
| if (instr->IsLabel()) { |
| emit_instructions = !LLabel::cast(instr)->HasReplacement(); |
| } |
| if (!emit_instructions) continue; |
| |
| if (FLAG_code_comments && instr->HasInterestingComment(this)) { |
| Comment(";;; <@%d,#%d> %s", |
| current_instruction_, |
| instr->hydrogen_value()->id(), |
| instr->Mnemonic()); |
| } |
| |
| instr->CompileToNative(this); |
| } |
| EnsureSpaceForLazyDeopt(); |
| return !is_aborted(); |
| } |
| |
| |
| bool LCodeGen::GenerateDeferredCode() { |
| ASSERT(is_generating()); |
| if (deferred_.length() > 0) { |
| for (int i = 0; !is_aborted() && i < deferred_.length(); i++) { |
| LDeferredCode* code = deferred_[i]; |
| Comment(";;; <@%d,#%d> " |
| "-------------------- Deferred %s --------------------", |
| code->instruction_index(), |
| code->instr()->hydrogen_value()->id(), |
| code->instr()->Mnemonic()); |
| __ bind(code->entry()); |
| if (NeedsDeferredFrame()) { |
| Comment(";;; Build frame"); |
| ASSERT(!frame_is_built_); |
| ASSERT(info()->IsStub()); |
| frame_is_built_ = true; |
| __ stm(db_w, sp, cp.bit() | fp.bit() | lr.bit()); |
| __ mov(scratch0(), Operand(Smi::FromInt(StackFrame::STUB))); |
| __ push(scratch0()); |
| __ add(fp, sp, Operand(2 * kPointerSize)); |
| Comment(";;; Deferred code"); |
| } |
| code->Generate(); |
| if (NeedsDeferredFrame()) { |
| Comment(";;; Destroy frame"); |
| ASSERT(frame_is_built_); |
| __ pop(ip); |
| __ ldm(ia_w, sp, cp.bit() | fp.bit() | lr.bit()); |
| frame_is_built_ = false; |
| } |
| __ jmp(code->exit()); |
| } |
| } |
| |
| // Force constant pool emission at the end of the deferred code to make |
| // sure that no constant pools are emitted after. |
| masm()->CheckConstPool(true, false); |
| |
| return !is_aborted(); |
| } |
| |
| |
| bool LCodeGen::GenerateDeoptJumpTable() { |
| // Check that the jump table is accessible from everywhere in the function |
| // code, i.e. that offsets to the table can be encoded in the 24bit signed |
| // immediate of a branch instruction. |
| // To simplify we consider the code size from the first instruction to the |
| // end of the jump table. We also don't consider the pc load delta. |
| // Each entry in the jump table generates one instruction and inlines one |
| // 32bit data after it. |
| if (!is_int24((masm()->pc_offset() / Assembler::kInstrSize) + |
| deopt_jump_table_.length() * 7)) { |
| Abort("Generated code is too large"); |
| } |
| |
| if (deopt_jump_table_.length() > 0) { |
| Comment(";;; -------------------- Jump table --------------------"); |
| } |
| Label table_start; |
| __ bind(&table_start); |
| Label needs_frame_not_call; |
| Label needs_frame_is_call; |
| for (int i = 0; i < deopt_jump_table_.length(); i++) { |
| __ bind(&deopt_jump_table_[i].label); |
| Address entry = deopt_jump_table_[i].address; |
| Deoptimizer::BailoutType type = deopt_jump_table_[i].bailout_type; |
| int id = Deoptimizer::GetDeoptimizationId(isolate(), entry, type); |
| if (id == Deoptimizer::kNotDeoptimizationEntry) { |
| Comment(";;; jump table entry %d.", i); |
| } else { |
| Comment(";;; jump table entry %d: deoptimization bailout %d.", i, id); |
| } |
| if (deopt_jump_table_[i].needs_frame) { |
| __ mov(ip, Operand(ExternalReference::ForDeoptEntry(entry))); |
| if (type == Deoptimizer::LAZY) { |
| if (needs_frame_is_call.is_bound()) { |
| __ b(&needs_frame_is_call); |
| } else { |
| __ bind(&needs_frame_is_call); |
| __ stm(db_w, sp, cp.bit() | fp.bit() | lr.bit()); |
| // This variant of deopt can only be used with stubs. Since we don't |
| // have a function pointer to install in the stack frame that we're |
| // building, install a special marker there instead. |
| ASSERT(info()->IsStub()); |
| __ mov(scratch0(), Operand(Smi::FromInt(StackFrame::STUB))); |
| __ push(scratch0()); |
| __ add(fp, sp, Operand(2 * kPointerSize)); |
| __ mov(lr, Operand(pc), LeaveCC, al); |
| __ mov(pc, ip); |
| } |
| } else { |
| if (needs_frame_not_call.is_bound()) { |
| __ b(&needs_frame_not_call); |
| } else { |
| __ bind(&needs_frame_not_call); |
| __ stm(db_w, sp, cp.bit() | fp.bit() | lr.bit()); |
| // This variant of deopt can only be used with stubs. Since we don't |
| // have a function pointer to install in the stack frame that we're |
| // building, install a special marker there instead. |
| ASSERT(info()->IsStub()); |
| __ mov(scratch0(), Operand(Smi::FromInt(StackFrame::STUB))); |
| __ push(scratch0()); |
| __ add(fp, sp, Operand(2 * kPointerSize)); |
| __ mov(pc, ip); |
| } |
| } |
| } else { |
| if (type == Deoptimizer::LAZY) { |
| __ mov(lr, Operand(pc), LeaveCC, al); |
| __ mov(pc, Operand(ExternalReference::ForDeoptEntry(entry))); |
| } else { |
| __ mov(pc, Operand(ExternalReference::ForDeoptEntry(entry))); |
| } |
| } |
| masm()->CheckConstPool(false, false); |
| } |
| |
| // Force constant pool emission at the end of the deopt jump table to make |
| // sure that no constant pools are emitted after. |
| masm()->CheckConstPool(true, false); |
| |
| // The deoptimization jump table 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(), GetStackSlotCount()); |
| return !is_aborted(); |
| } |
| |
| |
| Register LCodeGen::ToRegister(int index) const { |
| return Register::FromAllocationIndex(index); |
| } |
| |
| |
| DwVfpRegister LCodeGen::ToDoubleRegister(int index) const { |
| return DwVfpRegister::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()) { |
| LConstantOperand* const_op = LConstantOperand::cast(op); |
| HConstant* constant = chunk_->LookupConstant(const_op); |
| Handle<Object> literal = constant->handle(); |
| Representation r = chunk_->LookupLiteralRepresentation(const_op); |
| if (r.IsInteger32()) { |
| ASSERT(literal->IsNumber()); |
| __ mov(scratch, Operand(static_cast<int32_t>(literal->Number()))); |
| } else if (r.IsDouble()) { |
| Abort("EmitLoadRegister: Unsupported double immediate."); |
| } else { |
| ASSERT(r.IsTagged()); |
| if (literal->IsSmi()) { |
| __ mov(scratch, Operand(literal)); |
| } else { |
| __ LoadHeapObject(scratch, Handle<HeapObject>::cast(literal)); |
| } |
| } |
| return scratch; |
| } else if (op->IsStackSlot() || op->IsArgument()) { |
| __ ldr(scratch, ToMemOperand(op)); |
| return scratch; |
| } |
| UNREACHABLE(); |
| return scratch; |
| } |
| |
| |
| DwVfpRegister LCodeGen::ToDoubleRegister(LOperand* op) const { |
| ASSERT(op->IsDoubleRegister()); |
| return ToDoubleRegister(op->index()); |
| } |
| |
| |
| DwVfpRegister LCodeGen::EmitLoadDoubleRegister(LOperand* op, |
| SwVfpRegister flt_scratch, |
| DwVfpRegister dbl_scratch) { |
| if (op->IsDoubleRegister()) { |
| return ToDoubleRegister(op->index()); |
| } else if (op->IsConstantOperand()) { |
| LConstantOperand* const_op = LConstantOperand::cast(op); |
| HConstant* constant = chunk_->LookupConstant(const_op); |
| Handle<Object> literal = constant->handle(); |
| 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; |
| } |
| |
| |
| Handle<Object> LCodeGen::ToHandle(LConstantOperand* op) const { |
| HConstant* constant = chunk_->LookupConstant(op); |
| ASSERT(chunk_->LookupLiteralRepresentation(op).IsSmiOrTagged()); |
| return constant->handle(); |
| } |
| |
| |
| bool LCodeGen::IsInteger32(LConstantOperand* op) const { |
| return chunk_->LookupLiteralRepresentation(op).IsSmiOrInteger32(); |
| } |
| |
| |
| bool LCodeGen::IsSmi(LConstantOperand* op) const { |
| return chunk_->LookupLiteralRepresentation(op).IsSmi(); |
| } |
| |
| |
| int LCodeGen::ToInteger32(LConstantOperand* op) const { |
| HConstant* constant = chunk_->LookupConstant(op); |
| return constant->Integer32Value(); |
| } |
| |
| |
| Smi* LCodeGen::ToSmi(LConstantOperand* op) const { |
| HConstant* constant = chunk_->LookupConstant(op); |
| return Smi::FromInt(constant->Integer32Value()); |
| } |
| |
| |
| double LCodeGen::ToDouble(LConstantOperand* op) const { |
| HConstant* constant = chunk_->LookupConstant(op); |
| ASSERT(constant->HasDoubleValue()); |
| return constant->DoubleValue(); |
| } |
| |
| |
| Operand LCodeGen::ToOperand(LOperand* op) { |
| if (op->IsConstantOperand()) { |
| LConstantOperand* const_op = LConstantOperand::cast(op); |
| HConstant* constant = chunk()->LookupConstant(const_op); |
| Representation r = chunk_->LookupLiteralRepresentation(const_op); |
| if (r.IsInteger32()) { |
| ASSERT(constant->HasInteger32Value()); |
| return Operand(constant->Integer32Value()); |
| } else if (r.IsDouble()) { |
| Abort("ToOperand Unsupported double immediate."); |
| } |
| ASSERT(r.IsTagged()); |
| return Operand(constant->handle()); |
| } else if (op->IsRegister()) { |
| return Operand(ToRegister(op)); |
| } else if (op->IsDoubleRegister()) { |
| Abort("ToOperand IsDoubleRegister unimplemented"); |
| return Operand::Zero(); |
| } |
| // Stack slots not implemented, use ToMemOperand instead. |
| UNREACHABLE(); |
| return Operand::Zero(); |
| } |
| |
| |
| MemOperand LCodeGen::ToMemOperand(LOperand* op) const { |
| ASSERT(!op->IsRegister()); |
| ASSERT(!op->IsDoubleRegister()); |
| ASSERT(op->IsStackSlot() || op->IsDoubleStackSlot()); |
| return MemOperand(fp, StackSlotOffset(op->index())); |
| } |
| |
| |
| MemOperand LCodeGen::ToHighMemOperand(LOperand* op) const { |
| ASSERT(op->IsDoubleStackSlot()); |
| return MemOperand(fp, StackSlotOffset(op->index()) + 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->translation_size(); |
| // The output frame height does not include the parameters. |
| int height = translation_size - environment->parameter_count(); |
| |
| WriteTranslation(environment->outer(), translation); |
| bool has_closure_id = !info()->closure().is_null() && |
| !info()->closure().is_identical_to(environment->closure()); |
| int closure_id = has_closure_id |
| ? DefineDeoptimizationLiteral(environment->closure()) |
| : Translation::kSelfLiteralId; |
| |
| switch (environment->frame_type()) { |
| case JS_FUNCTION: |
| translation->BeginJSFrame(environment->ast_id(), closure_id, height); |
| break; |
| case JS_CONSTRUCT: |
| translation->BeginConstructStubFrame(closure_id, translation_size); |
| break; |
| case JS_GETTER: |
| ASSERT(translation_size == 1); |
| ASSERT(height == 0); |
| translation->BeginGetterStubFrame(closure_id); |
| break; |
| case JS_SETTER: |
| ASSERT(translation_size == 2); |
| ASSERT(height == 0); |
| translation->BeginSetterStubFrame(closure_id); |
| break; |
| case STUB: |
| translation->BeginCompiledStubFrame(); |
| break; |
| case ARGUMENTS_ADAPTOR: |
| translation->BeginArgumentsAdaptorFrame(closure_id, translation_size); |
| break; |
| } |
| |
| 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), |
| environment->HasUint32ValueAt(i)); |
| } else if ( |
| value->IsDoubleRegister() && |
| environment->spilled_double_registers()[value->index()] != NULL) { |
| translation->MarkDuplicate(); |
| AddToTranslation( |
| translation, |
| environment->spilled_double_registers()[value->index()], |
| false, |
| false); |
| } |
| } |
| |
| // TODO(mstarzinger): 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. |
| if (value == NULL) { |
| int arguments_count = environment->values()->length() - translation_size; |
| translation->BeginArgumentsObject(arguments_count); |
| for (int i = 0; i < arguments_count; ++i) { |
| LOperand* value = environment->values()->at(translation_size + i); |
| ASSERT(environment->spilled_registers() == NULL || |
| !value->IsRegister() || |
| environment->spilled_registers()[value->index()] == NULL); |
| ASSERT(environment->spilled_registers() == NULL || |
| !value->IsDoubleRegister() || |
| environment->spilled_double_registers()[value->index()] == NULL); |
| AddToTranslation(translation, |
| value, |
| environment->HasTaggedValueAt(translation_size + i), |
| environment->HasUint32ValueAt(translation_size + i)); |
| } |
| continue; |
| } |
| |
| AddToTranslation(translation, |
| value, |
| environment->HasTaggedValueAt(i), |
| environment->HasUint32ValueAt(i)); |
| } |
| } |
| |
| |
| void LCodeGen::AddToTranslation(Translation* translation, |
| LOperand* op, |
| bool is_tagged, |
| bool is_uint32) { |
| if (op->IsStackSlot()) { |
| if (is_tagged) { |
| translation->StoreStackSlot(op->index()); |
| } else if (is_uint32) { |
| translation->StoreUint32StackSlot(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 = GetStackSlotCount() + op->index(); |
| translation->StoreStackSlot(src_index); |
| } else if (op->IsRegister()) { |
| Register reg = ToRegister(op); |
| if (is_tagged) { |
| translation->StoreRegister(reg); |
| } else if (is_uint32) { |
| translation->StoreUint32Register(reg); |
| } else { |
| translation->StoreInt32Register(reg); |
| } |
| } else if (op->IsDoubleRegister()) { |
| DoubleRegister reg = ToDoubleRegister(op); |
| translation->StoreDoubleRegister(reg); |
| } else if (op->IsConstantOperand()) { |
| HConstant* constant = chunk()->LookupConstant(LConstantOperand::cast(op)); |
| int src_index = DefineDeoptimizationLiteral(constant->handle()); |
| translation->StoreLiteral(src_index); |
| } else { |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void LCodeGen::CallCode(Handle<Code> code, |
| RelocInfo::Mode mode, |
| LInstruction* instr, |
| TargetAddressStorageMode storage_mode) { |
| CallCodeGeneric(code, mode, instr, RECORD_SIMPLE_SAFEPOINT, storage_mode); |
| } |
| |
| |
| void LCodeGen::CallCodeGeneric(Handle<Code> code, |
| RelocInfo::Mode mode, |
| LInstruction* instr, |
| SafepointMode safepoint_mode, |
| TargetAddressStorageMode storage_mode) { |
| ASSERT(instr != NULL); |
| // Block literal pool emission to ensure nop indicating no inlined smi code |
| // is in the correct position. |
| Assembler::BlockConstPoolScope block_const_pool(masm()); |
| LPointerMap* pointers = instr->pointer_map(); |
| RecordPosition(pointers->position()); |
| __ Call(code, mode, TypeFeedbackId::None(), al, storage_mode); |
| RecordSafepointWithLazyDeopt(instr, safepoint_mode); |
| |
| // Signal that we don't inline smi code before these stubs in the |
| // optimizing code generator. |
| if (code->kind() == Code::BINARY_OP_IC || |
| code->kind() == Code::COMPARE_IC) { |
| __ nop(); |
| } |
| } |
| |
| |
| void LCodeGen::CallRuntime(const 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); |
| RecordSafepointWithLazyDeopt(instr, RECORD_SIMPLE_SAFEPOINT); |
| } |
| |
| |
| void LCodeGen::CallRuntimeFromDeferred(Runtime::FunctionId id, |
| int argc, |
| LInstruction* instr) { |
| __ CallRuntimeSaveDoubles(id); |
| RecordSafepointWithRegisters( |
| instr->pointer_map(), argc, Safepoint::kNoLazyDeopt); |
| } |
| |
| |
| void LCodeGen::RegisterEnvironmentForDeoptimization(LEnvironment* environment, |
| Safepoint::DeoptMode mode) { |
| if (!environment->HasBeenRegistered()) { |
| // Physical stack frame layout: |
| // -x ............. -4 0 ..................................... y |
| // [incoming arguments] [spill slots] [pushed outgoing arguments] |
| |
| // Layout of the environment: |
| // 0 ..................................................... size-1 |
| // [parameters] [locals] [expression stack including arguments] |
| |
| // Layout of the translation: |
| // 0 ........................................................ size - 1 + 4 |
| // [expression stack including arguments] [locals] [4 words] [parameters] |
| // |>------------ translation_size ------------<| |
| |
| int frame_count = 0; |
| int jsframe_count = 0; |
| for (LEnvironment* e = environment; e != NULL; e = e->outer()) { |
| ++frame_count; |
| if (e->frame_type() == JS_FUNCTION) { |
| ++jsframe_count; |
| } |
| } |
| Translation translation(&translations_, frame_count, jsframe_count, zone()); |
| WriteTranslation(environment, &translation); |
| int deoptimization_index = deoptimizations_.length(); |
| int pc_offset = masm()->pc_offset(); |
| environment->Register(deoptimization_index, |
| translation.index(), |
| (mode == Safepoint::kLazyDeopt) ? pc_offset : -1); |
| deoptimizations_.Add(environment, zone()); |
| } |
| } |
| |
| |
| void LCodeGen::DeoptimizeIf(Condition cc, |
| LEnvironment* environment, |
| Deoptimizer::BailoutType bailout_type) { |
| RegisterEnvironmentForDeoptimization(environment, Safepoint::kNoLazyDeopt); |
| ASSERT(environment->HasBeenRegistered()); |
| int id = environment->deoptimization_index(); |
| ASSERT(info()->IsOptimizing() || info()->IsStub()); |
| Address entry = |
| Deoptimizer::GetDeoptimizationEntry(isolate(), id, bailout_type); |
| 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()->IsStub() && |
| info()->opt_count() == id) { |
| __ Jump(entry, RelocInfo::RUNTIME_ENTRY); |
| return; |
| } |
| |
| if (FLAG_trap_on_deopt && info()->IsOptimizing()) { |
| __ stop("trap_on_deopt", cc); |
| } |
| |
| ASSERT(info()->IsStub() || frame_is_built_); |
| bool needs_lazy_deopt = info()->IsStub(); |
| if (cc == al && frame_is_built_) { |
| if (needs_lazy_deopt) { |
| __ Call(entry, RelocInfo::RUNTIME_ENTRY); |
| } else { |
| __ Jump(entry, RelocInfo::RUNTIME_ENTRY); |
| } |
| } else { |
| // We often have several deopts to the same entry, reuse the last |
| // jump entry if this is the case. |
| if (deopt_jump_table_.is_empty() || |
| (deopt_jump_table_.last().address != entry) || |
| (deopt_jump_table_.last().bailout_type != bailout_type) || |
| (deopt_jump_table_.last().needs_frame != !frame_is_built_)) { |
| Deoptimizer::JumpTableEntry table_entry(entry, |
| bailout_type, |
| !frame_is_built_); |
| deopt_jump_table_.Add(table_entry, zone()); |
| } |
| __ b(cc, &deopt_jump_table_.last().label); |
| } |
| } |
| |
| |
| void LCodeGen::DeoptimizeIf(Condition cc, |
| LEnvironment* environment) { |
| Deoptimizer::BailoutType bailout_type = info()->IsStub() |
| ? Deoptimizer::LAZY |
| : Deoptimizer::EAGER; |
| DeoptimizeIf(cc, environment, bailout_type); |
| } |
| |
| |
| void LCodeGen::SoftDeoptimize(LEnvironment* environment) { |
| ASSERT(!info()->IsStub()); |
| DeoptimizeIf(al, environment, Deoptimizer::SOFT); |
| } |
| |
| |
| void LCodeGen::RegisterDependentCodeForEmbeddedMaps(Handle<Code> code) { |
| ZoneList<Handle<Map> > maps(1, zone()); |
| int mode_mask = RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT); |
| for (RelocIterator it(*code, mode_mask); !it.done(); it.next()) { |
| RelocInfo::Mode mode = it.rinfo()->rmode(); |
| if (mode == RelocInfo::EMBEDDED_OBJECT && |
| it.rinfo()->target_object()->IsMap()) { |
| Handle<Map> map(Map::cast(it.rinfo()->target_object())); |
| if (map->CanTransition()) { |
| maps.Add(map, zone()); |
| } |
| } |
| } |
| #ifdef VERIFY_HEAP |
| // This disables verification of weak embedded maps after full GC. |
| // AddDependentCode can cause a GC, which would observe the state where |
| // this code is not yet in the depended code lists of the embedded maps. |
| NoWeakEmbeddedMapsVerificationScope disable_verification_of_embedded_maps; |
| #endif |
| for (int i = 0; i < maps.length(); i++) { |
| maps.at(i)->AddDependentCode(DependentCode::kWeaklyEmbeddedGroup, code); |
| } |
| } |
| |
| |
| void LCodeGen::PopulateDeoptimizationData(Handle<Code> code) { |
| int length = deoptimizations_.length(); |
| if (length == 0) return; |
| Handle<DeoptimizationInputData> data = |
| factory()->NewDeoptimizationInputData(length, TENURED); |
| |
| Handle<ByteArray> translations = |
| translations_.CreateByteArray(isolate()->factory()); |
| data->SetTranslationByteArray(*translations); |
| data->SetInlinedFunctionCount(Smi::FromInt(inlined_function_count_)); |
| |
| Handle<FixedArray> literals = |
| factory()->NewFixedArray(deoptimization_literals_.length(), TENURED); |
| { AllowDeferredHandleDereference copy_handles; |
| for (int i = 0; i < deoptimization_literals_.length(); i++) { |
| literals->set(i, *deoptimization_literals_[i]); |
| } |
| data->SetLiteralArray(*literals); |
| } |
| |
| data->SetOsrAstId(Smi::FromInt(info_->osr_ast_id().ToInt())); |
| data->SetOsrPcOffset(Smi::FromInt(osr_pc_offset_)); |
| |
| // Populate the deoptimization entries. |
| for (int i = 0; i < length; i++) { |
| LEnvironment* env = deoptimizations_[i]; |
| data->SetAstId(i, env->ast_id()); |
| data->SetTranslationIndex(i, Smi::FromInt(env->translation_index())); |
| data->SetArgumentsStackHeight(i, |
| Smi::FromInt(env->arguments_stack_height())); |
| data->SetPc(i, Smi::FromInt(env->pc_offset())); |
| } |
| code->set_deoptimization_data(*data); |
| } |
| |
| |
| 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, zone()); |
| 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::RecordSafepointWithLazyDeopt( |
| LInstruction* instr, SafepointMode safepoint_mode) { |
| if (safepoint_mode == RECORD_SIMPLE_SAFEPOINT) { |
| RecordSafepoint(instr->pointer_map(), Safepoint::kLazyDeopt); |
| } else { |
| ASSERT(safepoint_mode == RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS); |
| RecordSafepointWithRegisters( |
| instr->pointer_map(), 0, Safepoint::kLazyDeopt); |
| } |
| } |
| |
| |
| void LCodeGen::RecordSafepoint( |
| LPointerMap* pointers, |
| Safepoint::Kind kind, |
| int arguments, |
| Safepoint::DeoptMode deopt_mode) { |
| ASSERT(expected_safepoint_kind_ == kind); |
| |
| const ZoneList<LOperand*>* operands = pointers->GetNormalizedOperands(); |
| Safepoint safepoint = safepoints_.DefineSafepoint(masm(), |
| kind, arguments, deopt_mode); |
| for (int i = 0; i < operands->length(); i++) { |
| LOperand* pointer = operands->at(i); |
| if (pointer->IsStackSlot()) { |
| safepoint.DefinePointerSlot(pointer->index(), zone()); |
| } else if (pointer->IsRegister() && (kind & Safepoint::kWithRegisters)) { |
| safepoint.DefinePointerRegister(ToRegister(pointer), zone()); |
| } |
| } |
| if (kind & Safepoint::kWithRegisters) { |
| // Register cp always contains a pointer to the context. |
| safepoint.DefinePointerRegister(cp, zone()); |
| } |
| } |
| |
| |
| void LCodeGen::RecordSafepoint(LPointerMap* pointers, |
| Safepoint::DeoptMode deopt_mode) { |
| RecordSafepoint(pointers, Safepoint::kSimple, 0, deopt_mode); |
| } |
| |
| |
| void LCodeGen::RecordSafepoint(Safepoint::DeoptMode deopt_mode) { |
| LPointerMap empty_pointers(RelocInfo::kNoPosition, zone()); |
| RecordSafepoint(&empty_pointers, deopt_mode); |
| } |
| |
| |
| void LCodeGen::RecordSafepointWithRegisters(LPointerMap* pointers, |
| int arguments, |
| Safepoint::DeoptMode deopt_mode) { |
| RecordSafepoint( |
| pointers, Safepoint::kWithRegisters, arguments, deopt_mode); |
| } |
| |
| |
| void LCodeGen::RecordSafepointWithRegistersAndDoubles( |
| LPointerMap* pointers, |
| int arguments, |
| Safepoint::DeoptMode deopt_mode) { |
| RecordSafepoint( |
| pointers, Safepoint::kWithRegistersAndDoubles, arguments, deopt_mode); |
| } |
| |
| |
| void LCodeGen::RecordPosition(int position) { |
| if (position == RelocInfo::kNoPosition) return; |
| masm()->positions_recorder()->RecordPosition(position); |
| } |
| |
| |
| static const char* LabelType(LLabel* label) { |
| if (label->is_loop_header()) return " (loop header)"; |
| if (label->is_osr_entry()) return " (OSR entry)"; |
| return ""; |
| } |
| |
| |
| void LCodeGen::DoLabel(LLabel* label) { |
| Comment(";;; <@%d,#%d> -------------------- B%d%s --------------------", |
| current_instruction_, |
| label->hydrogen_value()->id(), |
| label->block_id(), |
| LabelType(label)); |
| __ bind(label->label()); |
| current_block_ = label->block_id(); |
| DoGap(label); |
| } |
| |
| |
| void LCodeGen::DoParallelMove(LParallelMove* move) { |
| resolver_.Resolve(move); |
| } |
| |
| |
| void LCodeGen::DoGap(LGap* gap) { |
| for (int i = LGap::FIRST_INNER_POSITION; |
| i <= LGap::LAST_INNER_POSITION; |
| i++) { |
| LGap::InnerPosition inner_pos = static_cast<LGap::InnerPosition>(i); |
| LParallelMove* move = gap->GetParallelMove(inner_pos); |
| if (move != NULL) DoParallelMove(move); |
| } |
| } |
| |
| |
| void LCodeGen::DoInstructionGap(LInstructionGap* instr) { |
| DoGap(instr); |
| } |
| |
| |
| void LCodeGen::DoParameter(LParameter* instr) { |
| // Nothing to do. |
| } |
| |
| |
| void LCodeGen::DoCallStub(LCallStub* instr) { |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| switch (instr->hydrogen()->major_key()) { |
| case CodeStub::RegExpConstructResult: { |
| RegExpConstructResultStub stub; |
| CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr); |
| break; |
| } |
| case CodeStub::RegExpExec: { |
| RegExpExecStub stub; |
| CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr); |
| break; |
| } |
| case CodeStub::SubString: { |
| SubStringStub stub; |
| CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr); |
| break; |
| } |
| case CodeStub::NumberToString: { |
| NumberToStringStub stub; |
| CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr); |
| break; |
| } |
| case CodeStub::StringAdd: { |
| StringAddStub stub(NO_STRING_ADD_FLAGS); |
| CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr); |
| break; |
| } |
| case CodeStub::StringCompare: { |
| StringCompareStub stub; |
| CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr); |
| break; |
| } |
| case CodeStub::TranscendentalCache: { |
| __ ldr(r0, MemOperand(sp, 0)); |
| TranscendentalCacheStub stub(instr->transcendental_type(), |
| TranscendentalCacheStub::TAGGED); |
| CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr); |
| break; |
| } |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void LCodeGen::DoUnknownOSRValue(LUnknownOSRValue* instr) { |
| // Nothing to do. |
| } |
| |
| |
| void LCodeGen::DoModI(LModI* instr) { |
| HMod* hmod = instr->hydrogen(); |
| HValue* left = hmod->left(); |
| HValue* right = hmod->right(); |
| if (hmod->HasPowerOf2Divisor()) { |
| // TODO(svenpanne) We should really do the strength reduction on the |
| // Hydrogen level. |
| Register left_reg = ToRegister(instr->left()); |
| Register result_reg = ToRegister(instr->result()); |
| |
| // Note: The code below even works when right contains kMinInt. |
| int32_t divisor = Abs(right->GetInteger32Constant()); |
| |
| Label left_is_not_negative, done; |
| if (left->CanBeNegative()) { |
| __ cmp(left_reg, Operand::Zero()); |
| __ b(pl, &left_is_not_negative); |
| __ rsb(result_reg, left_reg, Operand::Zero()); |
| __ and_(result_reg, result_reg, Operand(divisor - 1)); |
| __ rsb(result_reg, result_reg, Operand::Zero(), SetCC); |
| if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| __ b(&done); |
| } |
| |
| __ bind(&left_is_not_negative); |
| __ and_(result_reg, left_reg, Operand(divisor - 1)); |
| __ bind(&done); |
| |
| } else if (hmod->has_fixed_right_arg()) { |
| Register left_reg = ToRegister(instr->left()); |
| Register right_reg = ToRegister(instr->right()); |
| Register result_reg = ToRegister(instr->result()); |
| |
| int32_t divisor = hmod->fixed_right_arg_value(); |
| ASSERT(IsPowerOf2(divisor)); |
| |
| // Check if our assumption of a fixed right operand still holds. |
| __ cmp(right_reg, Operand(divisor)); |
| DeoptimizeIf(ne, instr->environment()); |
| |
| Label left_is_not_negative, done; |
| if (left->CanBeNegative()) { |
| __ cmp(left_reg, Operand::Zero()); |
| __ b(pl, &left_is_not_negative); |
| __ rsb(result_reg, left_reg, Operand::Zero()); |
| __ and_(result_reg, result_reg, Operand(divisor - 1)); |
| __ rsb(result_reg, result_reg, Operand::Zero(), SetCC); |
| if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| __ b(&done); |
| } |
| |
| __ bind(&left_is_not_negative); |
| __ and_(result_reg, left_reg, Operand(divisor - 1)); |
| __ bind(&done); |
| |
| } else if (CpuFeatures::IsSupported(SUDIV)) { |
| CpuFeatureScope scope(masm(), SUDIV); |
| |
| Register left_reg = ToRegister(instr->left()); |
| Register right_reg = ToRegister(instr->right()); |
| Register result_reg = ToRegister(instr->result()); |
| |
| Label done; |
| // Check for x % 0, sdiv might signal an exception. We have to deopt in this |
| // case because we can't return a NaN. |
| if (right->CanBeZero()) { |
| __ cmp(right_reg, Operand::Zero()); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| |
| // Check for kMinInt % -1, sdiv will return kMinInt, which is not what we |
| // want. We have to deopt if we care about -0, because we can't return that. |
| if (left->RangeCanInclude(kMinInt) && right->RangeCanInclude(-1)) { |
| Label no_overflow_possible; |
| __ cmp(left_reg, Operand(kMinInt)); |
| __ b(ne, &no_overflow_possible); |
| __ cmp(right_reg, Operand(-1)); |
| if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| DeoptimizeIf(eq, instr->environment()); |
| } else { |
| __ b(ne, &no_overflow_possible); |
| __ mov(result_reg, Operand::Zero()); |
| __ jmp(&done); |
| } |
| __ bind(&no_overflow_possible); |
| } |
| |
| // For 'r3 = r1 % r2' we can have the following ARM code: |
| // sdiv r3, r1, r2 |
| // mls r3, r3, r2, r1 |
| |
| __ sdiv(result_reg, left_reg, right_reg); |
| __ mls(result_reg, result_reg, right_reg, left_reg); |
| |
| // If we care about -0, test if the dividend is <0 and the result is 0. |
| if (left->CanBeNegative() && |
| hmod->CanBeZero() && |
| hmod->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| __ cmp(result_reg, Operand::Zero()); |
| __ b(ne, &done); |
| __ cmp(left_reg, Operand::Zero()); |
| DeoptimizeIf(lt, instr->environment()); |
| } |
| __ bind(&done); |
| |
| } else { |
| // General case, without any SDIV support. |
| Register left_reg = ToRegister(instr->left()); |
| Register right_reg = ToRegister(instr->right()); |
| Register result_reg = ToRegister(instr->result()); |
| Register scratch = scratch0(); |
| ASSERT(!scratch.is(left_reg)); |
| ASSERT(!scratch.is(right_reg)); |
| ASSERT(!scratch.is(result_reg)); |
| DwVfpRegister dividend = ToDoubleRegister(instr->temp()); |
| DwVfpRegister divisor = ToDoubleRegister(instr->temp2()); |
| ASSERT(!divisor.is(dividend)); |
| DwVfpRegister quotient = double_scratch0(); |
| ASSERT(!quotient.is(dividend)); |
| ASSERT(!quotient.is(divisor)); |
| |
| Label done; |
| // Check for x % 0, we have to deopt in this case because we can't return a |
| // NaN. |
| if (right->CanBeZero()) { |
| __ cmp(right_reg, Operand::Zero()); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| |
| __ Move(result_reg, left_reg); |
| // Load the arguments in VFP registers. The divisor value is preloaded |
| // before. Be careful that 'right_reg' is only live on entry. |
| // TODO(svenpanne) The last comments seems to be wrong nowadays. |
| __ vmov(dividend.low(), left_reg); |
| __ vmov(divisor.low(), right_reg); |
| |
| __ vcvt_f64_s32(dividend, dividend.low()); |
| __ vcvt_f64_s32(divisor, divisor.low()); |
| |
| // We do not care about the sign of the divisor. Note that we still handle |
| // the kMinInt % -1 case correctly, though. |
| __ vabs(divisor, divisor); |
| // Compute the quotient and round it to a 32bit integer. |
| __ vdiv(quotient, dividend, divisor); |
| __ vcvt_s32_f64(quotient.low(), quotient); |
| __ vcvt_f64_s32(quotient, quotient.low()); |
| |
| // Compute the remainder in result. |
| DwVfpRegister double_scratch = dividend; |
| __ vmul(double_scratch, divisor, quotient); |
| __ vcvt_s32_f64(double_scratch.low(), double_scratch); |
| __ vmov(scratch, double_scratch.low()); |
| __ sub(result_reg, left_reg, scratch, SetCC); |
| |
| // If we care about -0, test if the dividend is <0 and the result is 0. |
| if (left->CanBeNegative() && |
| hmod->CanBeZero() && |
| hmod->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| __ b(ne, &done); |
| __ cmp(left_reg, Operand::Zero()); |
| DeoptimizeIf(mi, instr->environment()); |
| } |
| __ bind(&done); |
| } |
| } |
| |
| |
| void LCodeGen::EmitSignedIntegerDivisionByConstant( |
| Register result, |
| Register dividend, |
| int32_t divisor, |
| Register remainder, |
| Register scratch, |
| LEnvironment* environment) { |
| ASSERT(!AreAliased(dividend, scratch, ip)); |
| ASSERT(LChunkBuilder::HasMagicNumberForDivisor(divisor)); |
| |
| uint32_t divisor_abs = abs(divisor); |
| |
| int32_t power_of_2_factor = |
| CompilerIntrinsics::CountTrailingZeros(divisor_abs); |
| |
| switch (divisor_abs) { |
| case 0: |
| DeoptimizeIf(al, environment); |
| return; |
| |
| case 1: |
| if (divisor > 0) { |
| __ Move(result, dividend); |
| } else { |
| __ rsb(result, dividend, Operand::Zero(), SetCC); |
| DeoptimizeIf(vs, environment); |
| } |
| // Compute the remainder. |
| __ mov(remainder, Operand::Zero()); |
| return; |
| |
| default: |
| if (IsPowerOf2(divisor_abs)) { |
| // Branch and condition free code for integer division by a power |
| // of two. |
| int32_t power = WhichPowerOf2(divisor_abs); |
| if (power > 1) { |
| __ mov(scratch, Operand(dividend, ASR, power - 1)); |
| } |
| __ add(scratch, dividend, Operand(scratch, LSR, 32 - power)); |
| __ mov(result, Operand(scratch, ASR, power)); |
| // Negate if necessary. |
| // We don't need to check for overflow because the case '-1' is |
| // handled separately. |
| if (divisor < 0) { |
| ASSERT(divisor != -1); |
| __ rsb(result, result, Operand::Zero()); |
| } |
| // Compute the remainder. |
| if (divisor > 0) { |
| __ sub(remainder, dividend, Operand(result, LSL, power)); |
| } else { |
| __ add(remainder, dividend, Operand(result, LSL, power)); |
| } |
| return; |
| } else { |
| // Use magic numbers for a few specific divisors. |
| // Details and proofs can be found in: |
| // - Hacker's Delight, Henry S. Warren, Jr. |
| // - The PowerPC Compiler Writer’s Guide |
| // and probably many others. |
| // |
| // We handle |
| // <divisor with magic numbers> * <power of 2> |
| // but not |
| // <divisor with magic numbers> * <other divisor with magic numbers> |
| DivMagicNumbers magic_numbers = |
| DivMagicNumberFor(divisor_abs >> power_of_2_factor); |
| // Branch and condition free code for integer division by a power |
| // of two. |
| const int32_t M = magic_numbers.M; |
| const int32_t s = magic_numbers.s + power_of_2_factor; |
| |
| __ mov(ip, Operand(M)); |
| __ smull(ip, scratch, dividend, ip); |
| if (M < 0) { |
| __ add(scratch, scratch, Operand(dividend)); |
| } |
| if (s > 0) { |
| __ mov(scratch, Operand(scratch, ASR, s)); |
| } |
| __ add(result, scratch, Operand(dividend, LSR, 31)); |
| if (divisor < 0) __ rsb(result, result, Operand::Zero()); |
| // Compute the remainder. |
| __ mov(ip, Operand(divisor)); |
| // This sequence could be replaced with 'mls' when |
| // it gets implemented. |
| __ mul(scratch, result, ip); |
| __ sub(remainder, dividend, scratch); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoDivI(LDivI* instr) { |
| if (instr->hydrogen()->HasPowerOf2Divisor()) { |
| Register dividend = ToRegister(instr->left()); |
| int32_t divisor = instr->hydrogen()->right()->GetInteger32Constant(); |
| int32_t test_value = 0; |
| int32_t power = 0; |
| |
| if (divisor > 0) { |
| test_value = divisor - 1; |
| power = WhichPowerOf2(divisor); |
| } else { |
| // Check for (0 / -x) that will produce negative zero. |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| __ tst(dividend, Operand(dividend)); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| // Check for (kMinInt / -1). |
| if (divisor == -1 && instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) { |
| __ cmp(dividend, Operand(kMinInt)); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| test_value = - divisor - 1; |
| power = WhichPowerOf2(-divisor); |
| } |
| |
| if (test_value != 0) { |
| if (instr->hydrogen()->CheckFlag( |
| HInstruction::kAllUsesTruncatingToInt32)) { |
| __ cmp(dividend, Operand(0)); |
| __ rsb(dividend, dividend, Operand(0), LeaveCC, lt); |
| __ mov(dividend, Operand(dividend, ASR, power)); |
| if (divisor > 0) __ rsb(dividend, dividend, Operand(0), LeaveCC, lt); |
| return; // Don't fall through to "__ rsb" below. |
| } else { |
| // Deoptimize if remainder is not 0. |
| __ tst(dividend, Operand(test_value)); |
| DeoptimizeIf(ne, instr->environment()); |
| __ mov(dividend, Operand(dividend, ASR, power)); |
| } |
| } |
| if (divisor < 0) __ rsb(dividend, dividend, Operand(0)); |
| |
| return; |
| } |
| |
| const Register left = ToRegister(instr->left()); |
| const Register right = ToRegister(instr->right()); |
| const Register result = ToRegister(instr->result()); |
| |
| // Check for x / 0. |
| if (instr->hydrogen()->CheckFlag(HValue::kCanBeDivByZero)) { |
| __ cmp(right, Operand::Zero()); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| |
| // Check for (0 / -x) that will produce negative zero. |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| Label left_not_zero; |
| __ cmp(left, Operand::Zero()); |
| __ b(ne, &left_not_zero); |
| __ cmp(right, Operand::Zero()); |
| 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); |
| } |
| |
| if (CpuFeatures::IsSupported(SUDIV)) { |
| CpuFeatureScope scope(masm(), SUDIV); |
| __ sdiv(result, left, right); |
| |
| if (!instr->hydrogen()->CheckFlag( |
| HInstruction::kAllUsesTruncatingToInt32)) { |
| // Compute remainder and deopt if it's not zero. |
| const Register remainder = scratch0(); |
| __ mls(remainder, result, right, left); |
| __ cmp(remainder, Operand::Zero()); |
| DeoptimizeIf(ne, instr->environment()); |
| } |
| } else { |
| const DoubleRegister vleft = ToDoubleRegister(instr->temp()); |
| const DoubleRegister vright = double_scratch0(); |
| __ vmov(vleft.low(), left); |
| __ vmov(vright.low(), right); |
| __ vcvt_f64_s32(vleft, vleft.low()); |
| __ vcvt_f64_s32(vright, vright.low()); |
| __ vdiv(vleft, vleft, vright); // vleft now contains the result. |
| __ vcvt_s32_f64(vright.low(), vleft); |
| __ vmov(result, vright.low()); |
| |
| if (!instr->hydrogen()->CheckFlag( |
| HInstruction::kAllUsesTruncatingToInt32)) { |
| // Deopt if exact conversion to integer was not possible. |
| // Use vright as scratch register. |
| __ vcvt_f64_s32(vright, vright.low()); |
| __ VFPCompareAndSetFlags(vleft, vright); |
| DeoptimizeIf(ne, instr->environment()); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoMultiplyAddD(LMultiplyAddD* instr) { |
| DwVfpRegister addend = ToDoubleRegister(instr->addend()); |
| DwVfpRegister multiplier = ToDoubleRegister(instr->multiplier()); |
| DwVfpRegister multiplicand = ToDoubleRegister(instr->multiplicand()); |
| |
| // This is computed in-place. |
| ASSERT(addend.is(ToDoubleRegister(instr->result()))); |
| |
| __ vmla(addend, multiplier, multiplicand); |
| } |
| |
| |
| void LCodeGen::DoMultiplySubD(LMultiplySubD* instr) { |
| DwVfpRegister minuend = ToDoubleRegister(instr->minuend()); |
| DwVfpRegister multiplier = ToDoubleRegister(instr->multiplier()); |
| DwVfpRegister multiplicand = ToDoubleRegister(instr->multiplicand()); |
| |
| // This is computed in-place. |
| ASSERT(minuend.is(ToDoubleRegister(instr->result()))); |
| |
| __ vmls(minuend, multiplier, multiplicand); |
| } |
| |
| |
| void LCodeGen::DoMathFloorOfDiv(LMathFloorOfDiv* instr) { |
| const Register result = ToRegister(instr->result()); |
| const Register left = ToRegister(instr->left()); |
| const Register remainder = ToRegister(instr->temp()); |
| const Register scratch = scratch0(); |
| |
| if (!CpuFeatures::IsSupported(SUDIV)) { |
| // If the CPU doesn't support sdiv instruction, we only optimize when we |
| // have magic numbers for the divisor. The standard integer division routine |
| // is usually slower than transitionning to VFP. |
| ASSERT(instr->right()->IsConstantOperand()); |
| int32_t divisor = ToInteger32(LConstantOperand::cast(instr->right())); |
| ASSERT(LChunkBuilder::HasMagicNumberForDivisor(divisor)); |
| if (divisor < 0) { |
| __ cmp(left, Operand::Zero()); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| EmitSignedIntegerDivisionByConstant(result, |
| left, |
| divisor, |
| remainder, |
| scratch, |
| instr->environment()); |
| // We performed a truncating division. Correct the result if necessary. |
| __ cmp(remainder, Operand::Zero()); |
| __ teq(remainder, Operand(divisor), ne); |
| __ sub(result, result, Operand(1), LeaveCC, mi); |
| } else { |
| CpuFeatureScope scope(masm(), SUDIV); |
| const Register right = ToRegister(instr->right()); |
| |
| // Check for x / 0. |
| __ cmp(right, Operand::Zero()); |
| DeoptimizeIf(eq, instr->environment()); |
| |
| // 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); |
| } |
| |
| // Check for (0 / -x) that will produce negative zero. |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| __ cmp(right, Operand::Zero()); |
| __ cmp(left, Operand::Zero(), mi); |
| // "right" can't be null because the code would have already been |
| // deoptimized. The Z flag is set only if (right < 0) and (left == 0). |
| // In this case we need to deoptimize to produce a -0. |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| |
| Label done; |
| __ sdiv(result, left, right); |
| // If both operands have the same sign then we are done. |
| __ eor(remainder, left, Operand(right), SetCC); |
| __ b(pl, &done); |
| |
| // Check if the result needs to be corrected. |
| __ mls(remainder, result, right, left); |
| __ cmp(remainder, Operand::Zero()); |
| __ sub(result, result, Operand(1), LeaveCC, ne); |
| |
| __ bind(&done); |
| } |
| } |
| |
| |
| void LCodeGen::DoMulI(LMulI* instr) { |
| Register scratch = scratch0(); |
| Register result = ToRegister(instr->result()); |
| // Note that result may alias left. |
| Register left = ToRegister(instr->left()); |
| LOperand* right_op = instr->right(); |
| |
| bool can_overflow = instr->hydrogen()->CheckFlag(HValue::kCanOverflow); |
| bool bailout_on_minus_zero = |
| instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero); |
| |
| if (right_op->IsConstantOperand() && !can_overflow) { |
| // Use optimized code for specific constants. |
| int32_t constant = ToInteger32(LConstantOperand::cast(right_op)); |
| |
| if (bailout_on_minus_zero && (constant < 0)) { |
| // The case of a null constant will be handled separately. |
| // If constant is negative and left is null, the result should be -0. |
| __ cmp(left, Operand::Zero()); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| |
| switch (constant) { |
| case -1: |
| __ rsb(result, left, Operand::Zero()); |
| break; |
| case 0: |
| if (bailout_on_minus_zero) { |
| // If left is strictly negative and the constant is null, the |
| // result is -0. Deoptimize if required, otherwise return 0. |
| __ cmp(left, Operand::Zero()); |
| DeoptimizeIf(mi, instr->environment()); |
| } |
| __ mov(result, Operand::Zero()); |
| break; |
| case 1: |
| __ Move(result, left); |
| break; |
| default: |
| // Multiplying by powers of two and powers of two plus or minus |
| // one can be done faster with shifted operands. |
| // For other constants we emit standard code. |
| int32_t mask = constant >> 31; |
| uint32_t constant_abs = (constant + mask) ^ mask; |
| |
| if (IsPowerOf2(constant_abs) || |
| IsPowerOf2(constant_abs - 1) || |
| IsPowerOf2(constant_abs + 1)) { |
| if (IsPowerOf2(constant_abs)) { |
| int32_t shift = WhichPowerOf2(constant_abs); |
| __ mov(result, Operand(left, LSL, shift)); |
| } else if (IsPowerOf2(constant_abs - 1)) { |
| int32_t shift = WhichPowerOf2(constant_abs - 1); |
| __ add(result, left, Operand(left, LSL, shift)); |
| } else if (IsPowerOf2(constant_abs + 1)) { |
| int32_t shift = WhichPowerOf2(constant_abs + 1); |
| __ rsb(result, left, Operand(left, LSL, shift)); |
| } |
| |
| // Correct the sign of the result is the constant is negative. |
| if (constant < 0) __ rsb(result, result, Operand::Zero()); |
| |
| } else { |
| // Generate standard code. |
| __ mov(ip, Operand(constant)); |
| __ mul(result, left, ip); |
| } |
| } |
| |
| } else { |
| Register right = EmitLoadRegister(right_op, scratch); |
| if (bailout_on_minus_zero) { |
| __ orr(ToRegister(instr->temp()), left, right); |
| } |
| |
| if (can_overflow) { |
| // scratch:result = left * right. |
| __ smull(result, scratch, left, right); |
| __ cmp(scratch, Operand(result, ASR, 31)); |
| DeoptimizeIf(ne, instr->environment()); |
| } else { |
| __ mul(result, left, right); |
| } |
| |
| if (bailout_on_minus_zero) { |
| // Bail out if the result is supposed to be negative zero. |
| Label done; |
| __ cmp(result, Operand::Zero()); |
| __ b(ne, &done); |
| __ cmp(ToRegister(instr->temp()), Operand::Zero()); |
| DeoptimizeIf(mi, instr->environment()); |
| __ bind(&done); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoBitI(LBitI* instr) { |
| LOperand* left_op = instr->left(); |
| LOperand* right_op = instr->right(); |
| ASSERT(left_op->IsRegister()); |
| Register left = ToRegister(left_op); |
| Register result = ToRegister(instr->result()); |
| Operand right(no_reg); |
| |
| if (right_op->IsStackSlot() || right_op->IsArgument()) { |
| right = Operand(EmitLoadRegister(right_op, ip)); |
| } else { |
| ASSERT(right_op->IsRegister() || right_op->IsConstantOperand()); |
| right = ToOperand(right_op); |
| } |
| |
| switch (instr->op()) { |
| case Token::BIT_AND: |
| __ and_(result, left, right); |
| break; |
| case Token::BIT_OR: |
| __ orr(result, left, right); |
| break; |
| case Token::BIT_XOR: |
| __ eor(result, left, right); |
| break; |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| |
| |
| void LCodeGen::DoShiftI(LShiftI* instr) { |
| // Both 'left' and 'right' are "used at start" (see LCodeGen::DoShift), so |
| // result may alias either of them. |
| LOperand* right_op = instr->right(); |
| Register left = ToRegister(instr->left()); |
| Register result = ToRegister(instr->result()); |
| Register scratch = scratch0(); |
| if (right_op->IsRegister()) { |
| // Mask the right_op operand. |
| __ and_(scratch, ToRegister(right_op), Operand(0x1F)); |
| switch (instr->op()) { |
| case Token::ROR: |
| __ mov(result, Operand(left, ROR, scratch)); |
| break; |
| case Token::SAR: |
| __ mov(result, Operand(left, ASR, scratch)); |
| break; |
| case Token::SHR: |
| if (instr->can_deopt()) { |
| __ mov(result, Operand(left, LSR, scratch), SetCC); |
| DeoptimizeIf(mi, instr->environment()); |
| } else { |
| __ mov(result, Operand(left, LSR, scratch)); |
| } |
| break; |
| case Token::SHL: |
| __ mov(result, Operand(left, LSL, scratch)); |
| break; |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| } else { |
| // Mask the right_op operand. |
| int value = ToInteger32(LConstantOperand::cast(right_op)); |
| uint8_t shift_count = static_cast<uint8_t>(value & 0x1F); |
| switch (instr->op()) { |
| case Token::ROR: |
| if (shift_count != 0) { |
| __ mov(result, Operand(left, ROR, shift_count)); |
| } else { |
| __ Move(result, left); |
| } |
| break; |
| case Token::SAR: |
| if (shift_count != 0) { |
| __ mov(result, Operand(left, ASR, shift_count)); |
| } else { |
| __ Move(result, left); |
| } |
| break; |
| case Token::SHR: |
| if (shift_count != 0) { |
| __ mov(result, Operand(left, LSR, shift_count)); |
| } else { |
| if (instr->can_deopt()) { |
| __ tst(left, Operand(0x80000000)); |
| DeoptimizeIf(ne, instr->environment()); |
| } |
| __ Move(result, left); |
| } |
| break; |
| case Token::SHL: |
| if (shift_count != 0) { |
| __ mov(result, Operand(left, LSL, shift_count)); |
| } else { |
| __ Move(result, left); |
| } |
| break; |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoSubI(LSubI* instr) { |
| LOperand* left = instr->left(); |
| LOperand* right = instr->right(); |
| LOperand* result = instr->result(); |
| bool can_overflow = instr->hydrogen()->CheckFlag(HValue::kCanOverflow); |
| SBit set_cond = can_overflow ? SetCC : LeaveCC; |
| |
| if (right->IsStackSlot() || right->IsArgument()) { |
| Register right_reg = EmitLoadRegister(right, ip); |
| __ sub(ToRegister(result), ToRegister(left), Operand(right_reg), set_cond); |
| } else { |
| ASSERT(right->IsRegister() || right->IsConstantOperand()); |
| __ sub(ToRegister(result), ToRegister(left), ToOperand(right), set_cond); |
| } |
| |
| if (can_overflow) { |
| DeoptimizeIf(vs, instr->environment()); |
| } |
| } |
| |
| |
| void LCodeGen::DoRSubI(LRSubI* instr) { |
| LOperand* left = instr->left(); |
| LOperand* right = instr->right(); |
| LOperand* result = instr->result(); |
| bool can_overflow = instr->hydrogen()->CheckFlag(HValue::kCanOverflow); |
| SBit set_cond = can_overflow ? SetCC : LeaveCC; |
| |
| if (right->IsStackSlot() || right->IsArgument()) { |
| Register right_reg = EmitLoadRegister(right, ip); |
| __ rsb(ToRegister(result), ToRegister(left), Operand(right_reg), set_cond); |
| } else { |
| ASSERT(right->IsRegister() || right->IsConstantOperand()); |
| __ rsb(ToRegister(result), ToRegister(left), ToOperand(right), set_cond); |
| } |
| |
| if (can_overflow) { |
| DeoptimizeIf(vs, instr->environment()); |
| } |
| } |
| |
| |
| void LCodeGen::DoConstantI(LConstantI* instr) { |
| __ mov(ToRegister(instr->result()), Operand(instr->value())); |
| } |
| |
| |
| void LCodeGen::DoConstantS(LConstantS* instr) { |
| __ 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, scratch0()); |
| } |
| |
| |
| void LCodeGen::DoConstantT(LConstantT* instr) { |
| Handle<Object> value = instr->value(); |
| AllowDeferredHandleDereference smi_check; |
| if (value->IsSmi()) { |
| __ mov(ToRegister(instr->result()), Operand(value)); |
| } else { |
| __ LoadHeapObject(ToRegister(instr->result()), |
| Handle<HeapObject>::cast(value)); |
| } |
| } |
| |
| |
| void LCodeGen::DoFixedArrayBaseLength(LFixedArrayBaseLength* instr) { |
| Register result = ToRegister(instr->result()); |
| Register array = ToRegister(instr->value()); |
| __ ldr(result, FieldMemOperand(array, FixedArrayBase::kLengthOffset)); |
| } |
| |
| |
| void LCodeGen::DoMapEnumLength(LMapEnumLength* instr) { |
| Register result = ToRegister(instr->result()); |
| Register map = ToRegister(instr->value()); |
| __ EnumLength(result, map); |
| } |
| |
| |
| void LCodeGen::DoElementsKind(LElementsKind* instr) { |
| Register result = ToRegister(instr->result()); |
| Register input = ToRegister(instr->value()); |
| |
| // Load map into |result|. |
| __ ldr(result, FieldMemOperand(input, HeapObject::kMapOffset)); |
| // Load the map's "bit field 2" into |result|. We only need the first byte, |
| // but the following bit field extraction takes care of that anyway. |
| __ ldr(result, FieldMemOperand(result, Map::kBitField2Offset)); |
| // Retrieve elements_kind from bit field 2. |
| __ ubfx(result, result, Map::kElementsKindShift, Map::kElementsKindBitCount); |
| } |
| |
| |
| void LCodeGen::DoValueOf(LValueOf* instr) { |
| Register input = ToRegister(instr->value()); |
| Register result = ToRegister(instr->result()); |
| Register map = ToRegister(instr->temp()); |
| Label done; |
| |
| // If the object is a smi return the object. |
| __ SmiTst(input); |
| __ Move(result, input, eq); |
| __ b(eq, &done); |
| |
| // If the object is not a value type, return the object. |
| __ CompareObjectType(input, map, map, JS_VALUE_TYPE); |
| __ Move(result, input, ne); |
| __ b(ne, &done); |
| __ ldr(result, FieldMemOperand(input, JSValue::kValueOffset)); |
| |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoDateField(LDateField* instr) { |
| Register object = ToRegister(instr->date()); |
| Register result = ToRegister(instr->result()); |
| Register scratch = ToRegister(instr->temp()); |
| Smi* index = instr->index(); |
| Label runtime, done; |
| ASSERT(object.is(result)); |
| ASSERT(object.is(r0)); |
| ASSERT(!scratch.is(scratch0())); |
| ASSERT(!scratch.is(object)); |
| |
| __ SmiTst(object); |
| DeoptimizeIf(eq, instr->environment()); |
| __ CompareObjectType(object, scratch, scratch, JS_DATE_TYPE); |
| DeoptimizeIf(ne, instr->environment()); |
| |
| if (index->value() == 0) { |
| __ ldr(result, FieldMemOperand(object, JSDate::kValueOffset)); |
| } else { |
| if (index->value() < JSDate::kFirstUncachedField) { |
| ExternalReference stamp = ExternalReference::date_cache_stamp(isolate()); |
| __ mov(scratch, Operand(stamp)); |
| __ ldr(scratch, MemOperand(scratch)); |
| __ ldr(scratch0(), FieldMemOperand(object, JSDate::kCacheStampOffset)); |
| __ cmp(scratch, scratch0()); |
| __ b(ne, &runtime); |
| __ ldr(result, FieldMemOperand(object, JSDate::kValueOffset + |
| kPointerSize * index->value())); |
| __ jmp(&done); |
| } |
| __ bind(&runtime); |
| __ PrepareCallCFunction(2, scratch); |
| __ mov(r1, Operand(index)); |
| __ CallCFunction(ExternalReference::get_date_field_function(isolate()), 2); |
| __ bind(&done); |
| } |
| } |
| |
| |
| void LCodeGen::DoSeqStringSetChar(LSeqStringSetChar* instr) { |
| Register string = ToRegister(instr->string()); |
| Register index = ToRegister(instr->index()); |
| Register value = ToRegister(instr->value()); |
| String::Encoding encoding = instr->encoding(); |
| |
| if (FLAG_debug_code) { |
| __ ldr(ip, FieldMemOperand(string, HeapObject::kMapOffset)); |
| __ ldrb(ip, FieldMemOperand(ip, Map::kInstanceTypeOffset)); |
| |
| __ and_(ip, ip, Operand(kStringRepresentationMask | kStringEncodingMask)); |
| static const uint32_t one_byte_seq_type = kSeqStringTag | kOneByteStringTag; |
| static const uint32_t two_byte_seq_type = kSeqStringTag | kTwoByteStringTag; |
| __ cmp(ip, Operand(encoding == String::ONE_BYTE_ENCODING |
| ? one_byte_seq_type : two_byte_seq_type)); |
| __ Check(eq, "Unexpected string type"); |
| } |
| |
| __ add(ip, |
| string, |
| Operand(SeqString::kHeaderSize - kHeapObjectTag)); |
| if (encoding == String::ONE_BYTE_ENCODING) { |
| __ strb(value, MemOperand(ip, index)); |
| } else { |
| // MemOperand with ip as the base register is not allowed for strh, so |
| // we do the address calculation explicitly. |
| __ add(ip, ip, Operand(index, LSL, 1)); |
| __ strh(value, MemOperand(ip)); |
| } |
| } |
| |
| |
| void LCodeGen::DoBitNotI(LBitNotI* instr) { |
| Register input = ToRegister(instr->value()); |
| Register result = ToRegister(instr->result()); |
| __ mvn(result, Operand(input)); |
| } |
| |
| |
| void LCodeGen::DoThrow(LThrow* instr) { |
| Register input_reg = EmitLoadRegister(instr->value(), ip); |
| __ push(input_reg); |
| CallRuntime(Runtime::kThrow, 1, instr); |
| |
| if (FLAG_debug_code) { |
| __ stop("Unreachable code."); |
| } |
| } |
| |
| |
| void LCodeGen::DoAddI(LAddI* instr) { |
| LOperand* left = instr->left(); |
| LOperand* right = instr->right(); |
| LOperand* result = instr->result(); |
| bool can_overflow = instr->hydrogen()->CheckFlag(HValue::kCanOverflow); |
| SBit set_cond = can_overflow ? SetCC : LeaveCC; |
| |
| if (right->IsStackSlot() || right->IsArgument()) { |
| Register right_reg = EmitLoadRegister(right, ip); |
| __ add(ToRegister(result), ToRegister(left), Operand(right_reg), set_cond); |
| } else { |
| ASSERT(right->IsRegister() || right->IsConstantOperand()); |
| __ add(ToRegister(result), ToRegister(left), ToOperand(right), set_cond); |
| } |
| |
| if (can_overflow) { |
| DeoptimizeIf(vs, instr->environment()); |
| } |
| } |
| |
| |
| void LCodeGen::DoMathMinMax(LMathMinMax* instr) { |
| LOperand* left = instr->left(); |
| LOperand* right = instr->right(); |
| HMathMinMax::Operation operation = instr->hydrogen()->operation(); |
| if (instr->hydrogen()->representation().IsInteger32()) { |
| Condition condition = (operation == HMathMinMax::kMathMin) ? le : ge; |
| Register left_reg = ToRegister(left); |
| Operand right_op = (right->IsRegister() || right->IsConstantOperand()) |
| ? ToOperand(right) |
| : Operand(EmitLoadRegister(right, ip)); |
| Register result_reg = ToRegister(instr->result()); |
| __ cmp(left_reg, right_op); |
| __ Move(result_reg, left_reg, condition); |
| __ mov(result_reg, right_op, LeaveCC, NegateCondition(condition)); |
| } else { |
| ASSERT(instr->hydrogen()->representation().IsDouble()); |
| DwVfpRegister left_reg = ToDoubleRegister(left); |
| DwVfpRegister right_reg = ToDoubleRegister(right); |
| DwVfpRegister result_reg = ToDoubleRegister(instr->result()); |
| Label result_is_nan, return_left, return_right, check_zero, done; |
| __ VFPCompareAndSetFlags(left_reg, right_reg); |
| if (operation == HMathMinMax::kMathMin) { |
| __ b(mi, &return_left); |
| __ b(gt, &return_right); |
| } else { |
| __ b(mi, &return_right); |
| __ b(gt, &return_left); |
| } |
| __ b(vs, &result_is_nan); |
| // Left equals right => check for -0. |
| __ VFPCompareAndSetFlags(left_reg, 0.0); |
| if (left_reg.is(result_reg) || right_reg.is(result_reg)) { |
| __ b(ne, &done); // left == right != 0. |
| } else { |
| __ b(ne, &return_left); // left == right != 0. |
| } |
| // At this point, both left and right are either 0 or -0. |
| if (operation == HMathMinMax::kMathMin) { |
| // We could use a single 'vorr' instruction here if we had NEON support. |
| __ vneg(left_reg, left_reg); |
| __ vsub(result_reg, left_reg, right_reg); |
| __ vneg(result_reg, result_reg); |
| } else { |
| // Since we operate on +0 and/or -0, vadd and vand have the same effect; |
| // the decision for vadd is easy because vand is a NEON instruction. |
| __ vadd(result_reg, left_reg, right_reg); |
| } |
| __ b(&done); |
| |
| __ bind(&result_is_nan); |
| __ vadd(result_reg, left_reg, right_reg); |
| __ b(&done); |
| |
| __ bind(&return_right); |
| __ Move(result_reg, right_reg); |
| if (!left_reg.is(result_reg)) { |
| __ b(&done); |
| } |
| |
| __ bind(&return_left); |
| __ Move(result_reg, left_reg); |
| |
| __ bind(&done); |
| } |
| } |
| |
| |
| void LCodeGen::DoArithmeticD(LArithmeticD* instr) { |
| DwVfpRegister left = ToDoubleRegister(instr->left()); |
| DwVfpRegister right = ToDoubleRegister(instr->right()); |
| DwVfpRegister result = ToDoubleRegister(instr->result()); |
| switch (instr->op()) { |
| case Token::ADD: |
| __ vadd(result, left, right); |
| break; |
| case Token::SUB: |
| __ vsub(result, left, right); |
| break; |
| case Token::MUL: |
| __ vmul(result, left, right); |
| break; |
| case Token::DIV: |
| __ vdiv(result, 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(0, 2, scratch0()); |
| __ SetCallCDoubleArguments(left, right); |
| __ CallCFunction( |
| ExternalReference::double_fp_operation(Token::MOD, isolate()), |
| 0, 2); |
| // Move the result in the double result register. |
| __ GetCFunctionDoubleResult(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->left()).is(r1)); |
| ASSERT(ToRegister(instr->right()).is(r0)); |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| |
| BinaryOpStub stub(instr->op(), NO_OVERWRITE); |
| // Block literal pool emission to ensure nop indicating no inlined smi code |
| // is in the correct position. |
| Assembler::BlockConstPoolScope block_const_pool(masm()); |
| CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr); |
| __ nop(); // Signals no inlined code. |
| } |
| |
| |
| int LCodeGen::GetNextEmittedBlock() const { |
| for (int i = current_block_ + 1; i < graph()->blocks()->length(); ++i) { |
| if (!chunk_->GetLabel(i)->HasReplacement()) return i; |
| } |
| return -1; |
| } |
| |
| |
| void LCodeGen::EmitBranch(int left_block, int right_block, Condition cc) { |
| int next_block = GetNextEmittedBlock(); |
| 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::DoDebugBreak(LDebugBreak* instr) { |
| __ stop("LBreak"); |
| } |
| |
| |
| 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()->value()->representation(); |
| if (r.IsInteger32() || r.IsSmi()) { |
| ASSERT(!info()->IsStub()); |
| Register reg = ToRegister(instr->value()); |
| __ cmp(reg, Operand::Zero()); |
| EmitBranch(true_block, false_block, ne); |
| } else if (r.IsDouble()) { |
| ASSERT(!info()->IsStub()); |
| DwVfpRegister reg = ToDoubleRegister(instr->value()); |
| // Test the double value. Zero and NaN are false. |
| __ VFPCompareAndSetFlags(reg, 0.0); |
| __ cmp(r0, r0, vs); // If NaN, set the Z flag. |
| EmitBranch(true_block, false_block, ne); |
| } else { |
| ASSERT(r.IsTagged()); |
| Register reg = ToRegister(instr->value()); |
| HType type = instr->hydrogen()->value()->type(); |
| if (type.IsBoolean()) { |
| ASSERT(!info()->IsStub()); |
| __ CompareRoot(reg, Heap::kTrueValueRootIndex); |
| EmitBranch(true_block, false_block, eq); |
| } else if (type.IsSmi()) { |
| ASSERT(!info()->IsStub()); |
| __ cmp(reg, Operand::Zero()); |
| EmitBranch(true_block, false_block, ne); |
| } else { |
| Label* true_label = chunk_->GetAssemblyLabel(true_block); |
| Label* false_label = chunk_->GetAssemblyLabel(false_block); |
| |
| ToBooleanStub::Types expected = instr->hydrogen()->expected_input_types(); |
| // Avoid deopts in the case where we've never executed this path before. |
| if (expected.IsEmpty()) expected = ToBooleanStub::all_types(); |
| |
| if (expected.Contains(ToBooleanStub::UNDEFINED)) { |
| // undefined -> false. |
| __ CompareRoot(reg, Heap::kUndefinedValueRootIndex); |
| __ b(eq, false_label); |
| } |
| if (expected.Contains(ToBooleanStub::BOOLEAN)) { |
| // Boolean -> its value. |
| __ CompareRoot(reg, Heap::kTrueValueRootIndex); |
| __ b(eq, true_label); |
| __ CompareRoot(reg, Heap::kFalseValueRootIndex); |
| __ b(eq, false_label); |
| } |
| if (expected.Contains(ToBooleanStub::NULL_TYPE)) { |
| // 'null' -> false. |
| __ CompareRoot(reg, Heap::kNullValueRootIndex); |
| __ b(eq, false_label); |
| } |
| |
| if (expected.Contains(ToBooleanStub::SMI)) { |
| // Smis: 0 -> false, all other -> true. |
| __ cmp(reg, Operand::Zero()); |
| __ b(eq, false_label); |
| __ JumpIfSmi(reg, true_label); |
| } else if (expected.NeedsMap()) { |
| // If we need a map later and have a Smi -> deopt. |
| __ SmiTst(reg); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| |
| const Register map = scratch0(); |
| if (expected.NeedsMap()) { |
| __ ldr(map, FieldMemOperand(reg, HeapObject::kMapOffset)); |
| |
| if (expected.CanBeUndetectable()) { |
| // Undetectable -> false. |
| __ ldrb(ip, FieldMemOperand(map, Map::kBitFieldOffset)); |
| __ tst(ip, Operand(1 << Map::kIsUndetectable)); |
| __ b(ne, false_label); |
| } |
| } |
| |
| if (expected.Contains(ToBooleanStub::SPEC_OBJECT)) { |
| // spec object -> true. |
| __ CompareInstanceType(map, ip, FIRST_SPEC_OBJECT_TYPE); |
| __ b(ge, true_label); |
| } |
| |
| if (expected.Contains(ToBooleanStub::STRING)) { |
| // String value -> false iff empty. |
| Label not_string; |
| __ CompareInstanceType(map, ip, FIRST_NONSTRING_TYPE); |
| __ b(ge, ¬_string); |
| __ ldr(ip, FieldMemOperand(reg, String::kLengthOffset)); |
| __ cmp(ip, Operand::Zero()); |
| __ b(ne, true_label); |
| __ b(false_label); |
| __ bind(¬_string); |
| } |
| |
| if (expected.Contains(ToBooleanStub::SYMBOL)) { |
| // Symbol value -> true. |
| __ CompareInstanceType(map, ip, SYMBOL_TYPE); |
| __ b(eq, true_label); |
| } |
| |
| if (expected.Contains(ToBooleanStub::HEAP_NUMBER)) { |
| // heap number -> false iff +0, -0, or NaN. |
| DwVfpRegister dbl_scratch = double_scratch0(); |
| Label not_heap_number; |
| __ CompareRoot(map, Heap::kHeapNumberMapRootIndex); |
| __ b(ne, ¬_heap_number); |
| __ vldr(dbl_scratch, FieldMemOperand(reg, HeapNumber::kValueOffset)); |
| __ VFPCompareAndSetFlags(dbl_scratch, 0.0); |
| __ cmp(r0, r0, vs); // NaN -> false. |
| __ b(eq, false_label); // +0, -0 -> false. |
| __ b(true_label); |
| __ bind(¬_heap_number); |
| } |
| |
| // We've seen something for the first time -> deopt. |
| DeoptimizeIf(al, instr->environment()); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::EmitGoto(int block) { |
| if (!IsNextEmittedBlock(block)) { |
| __ jmp(chunk_->GetAssemblyLabel(chunk_->LookupDestination(block))); |
| } |
| } |
| |
| |
| void LCodeGen::DoGoto(LGoto* instr) { |
| EmitGoto(instr->block_id()); |
| } |
| |
| |
| 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::DoCmpIDAndBranch(LCmpIDAndBranch* instr) { |
| LOperand* left = instr->left(); |
| LOperand* right = instr->right(); |
| int false_block = chunk_->LookupDestination(instr->false_block_id()); |
| int true_block = chunk_->LookupDestination(instr->true_block_id()); |
| Condition cond = TokenToCondition(instr->op(), false); |
| |
| if (left->IsConstantOperand() && right->IsConstantOperand()) { |
| // We can statically evaluate the comparison. |
| double left_val = ToDouble(LConstantOperand::cast(left)); |
| double right_val = ToDouble(LConstantOperand::cast(right)); |
| int next_block = |
| EvalComparison(instr->op(), left_val, right_val) ? true_block |
| : false_block; |
| EmitGoto(next_block); |
| } else { |
| if (instr->is_double()) { |
| // Compare left and right operands 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 { |
| if (right->IsConstantOperand()) { |
| int32_t value = ToInteger32(LConstantOperand::cast(right)); |
| if (instr->hydrogen_value()->representation().IsSmi()) { |
| __ cmp(ToRegister(left), Operand(Smi::FromInt(value))); |
| } else { |
| __ cmp(ToRegister(left), Operand(value)); |
| } |
| } else if (left->IsConstantOperand()) { |
| int32_t value = ToInteger32(LConstantOperand::cast(left)); |
| if (instr->hydrogen_value()->representation().IsSmi()) { |
| __ cmp(ToRegister(right), Operand(Smi::FromInt(value))); |
| } else { |
| __ cmp(ToRegister(right), Operand(value)); |
| } |
| // We transposed the operands. Reverse the condition. |
| cond = ReverseCondition(cond); |
| } else { |
| __ cmp(ToRegister(left), ToRegister(right)); |
| } |
| } |
| EmitBranch(true_block, false_block, cond); |
| } |
| } |
| |
| |
| void LCodeGen::DoCmpObjectEqAndBranch(LCmpObjectEqAndBranch* instr) { |
| Register left = ToRegister(instr->left()); |
| Register right = ToRegister(instr->right()); |
| 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::DoCmpConstantEqAndBranch(LCmpConstantEqAndBranch* instr) { |
| Register left = ToRegister(instr->left()); |
| int true_block = chunk_->LookupDestination(instr->true_block_id()); |
| int false_block = chunk_->LookupDestination(instr->false_block_id()); |
| |
| __ cmp(left, Operand(instr->hydrogen()->right())); |
| EmitBranch(true_block, false_block, eq); |
| } |
| |
| |
| Condition LCodeGen::EmitIsObject(Register input, |
| Register temp1, |
| Label* is_not_object, |
| Label* is_object) { |
| Register temp2 = scratch0(); |
| __ JumpIfSmi(input, is_not_object); |
| |
| __ LoadRoot(temp2, Heap::kNullValueRootIndex); |
| __ cmp(input, temp2); |
| __ 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_NONCALLABLE_SPEC_OBJECT_TYPE)); |
| __ b(lt, is_not_object); |
| __ cmp(temp2, Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
| return le; |
| } |
| |
| |
| void LCodeGen::DoIsObjectAndBranch(LIsObjectAndBranch* instr) { |
| Register reg = ToRegister(instr->value()); |
| Register temp1 = ToRegister(instr->temp()); |
| |
| 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, false_label, true_label); |
| |
| EmitBranch(true_block, false_block, true_cond); |
| } |
| |
| |
| Condition LCodeGen::EmitIsString(Register input, |
| Register temp1, |
| Label* is_not_string) { |
| __ JumpIfSmi(input, is_not_string); |
| __ CompareObjectType(input, temp1, temp1, FIRST_NONSTRING_TYPE); |
| |
| return lt; |
| } |
| |
| |
| void LCodeGen::DoIsStringAndBranch(LIsStringAndBranch* instr) { |
| Register reg = ToRegister(instr->value()); |
| Register temp1 = ToRegister(instr->temp()); |
| |
| 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); |
| |
| Condition true_cond = |
| EmitIsString(reg, temp1, false_label); |
| |
| EmitBranch(true_block, false_block, true_cond); |
| } |
| |
| |
| 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->value(), ip); |
| __ SmiTst(input_reg); |
| EmitBranch(true_block, false_block, eq); |
| } |
| |
| |
| void LCodeGen::DoIsUndetectableAndBranch(LIsUndetectableAndBranch* instr) { |
| Register input = ToRegister(instr->value()); |
| Register temp = ToRegister(instr->temp()); |
| |
| int true_block = chunk_->LookupDestination(instr->true_block_id()); |
| int false_block = chunk_->LookupDestination(instr->false_block_id()); |
| |
| __ JumpIfSmi(input, chunk_->GetAssemblyLabel(false_block)); |
| __ ldr(temp, FieldMemOperand(input, HeapObject::kMapOffset)); |
| __ ldrb(temp, FieldMemOperand(temp, Map::kBitFieldOffset)); |
| __ tst(temp, Operand(1 << Map::kIsUndetectable)); |
| EmitBranch(true_block, false_block, ne); |
| } |
| |
| |
| 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::DoStringCompareAndBranch(LStringCompareAndBranch* 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(isolate(), op); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| // This instruction also signals no smi code inlined. |
| __ cmp(r0, Operand::Zero()); |
| |
| Condition condition = ComputeCompareCondition(op); |
| |
| EmitBranch(true_block, false_block, condition); |
| } |
| |
| |
| static InstanceType TestType(HHasInstanceTypeAndBranch* 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(HHasInstanceTypeAndBranch* 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::DoHasInstanceTypeAndBranch(LHasInstanceTypeAndBranch* instr) { |
| Register scratch = scratch0(); |
| Register input = ToRegister(instr->value()); |
| |
| 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); |
| |
| __ JumpIfSmi(input, 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->value()); |
| Register result = ToRegister(instr->result()); |
| |
| __ AssertString(input); |
| |
| __ ldr(result, FieldMemOperand(input, String::kHashFieldOffset)); |
| __ IndexFromHash(result, result); |
| } |
| |
| |
| void LCodeGen::DoHasCachedArrayIndexAndBranch( |
| LHasCachedArrayIndexAndBranch* instr) { |
| Register input = ToRegister(instr->value()); |
| 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. |
| void LCodeGen::EmitClassOfTest(Label* is_true, |
| Label* is_false, |
| Handle<String>class_name, |
| Register input, |
| Register temp, |
| Register temp2) { |
| ASSERT(!input.is(temp)); |
| ASSERT(!input.is(temp2)); |
| ASSERT(!temp.is(temp2)); |
| |
| __ JumpIfSmi(input, is_false); |
| |
| if (class_name->IsOneByteEqualTo(STATIC_ASCII_VECTOR("Function"))) { |
| // Assuming the following assertions, we can use the same compares to test |
| // for both being a function type and being in the object type range. |
| STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2); |
| STATIC_ASSERT(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE == |
| FIRST_SPEC_OBJECT_TYPE + 1); |
| STATIC_ASSERT(LAST_NONCALLABLE_SPEC_OBJECT_TYPE == |
| LAST_SPEC_OBJECT_TYPE - 1); |
| STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); |
| __ CompareObjectType(input, temp, temp2, FIRST_SPEC_OBJECT_TYPE); |
| __ b(lt, is_false); |
| __ b(eq, is_true); |
| __ cmp(temp2, Operand(LAST_SPEC_OBJECT_TYPE)); |
| __ b(eq, is_true); |
| } else { |
| // Faster code path to avoid two compares: subtract lower bound from the |
| // actual type and do a signed compare with the width of the type range. |
| __ ldr(temp, FieldMemOperand(input, HeapObject::kMapOffset)); |
| __ ldrb(temp2, FieldMemOperand(temp, Map::kInstanceTypeOffset)); |
| __ sub(temp2, temp2, Operand(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
| __ cmp(temp2, Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE - |
| FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
| __ b(gt, is_false); |
| } |
| |
| // Now we are in the FIRST-LAST_NONCALLABLE_SPEC_OBJECT_TYPE range. |
| // Check if the constructor in the map is a function. |
| __ ldr(temp, FieldMemOperand(temp, Map::kConstructorOffset)); |
| |
| // Objects with a non-function constructor have class 'Object'. |
| __ CompareObjectType(temp, temp2, temp2, JS_FUNCTION_TYPE); |
| if (class_name->IsOneByteEqualTo(STATIC_ASCII_VECTOR("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 internalized since it's a literal. |
| // The name in the constructor is internalized because of the way the context |
| // is booted. This routine isn't expected to work for random API-created |
| // classes and it doesn't have to because you can't access it with natives |
| // syntax. Since both sides are internalized it is sufficient to use an |
| // identity comparison. |
| __ cmp(temp, Operand(class_name)); |
| // End with the answer in flags. |
| } |
| |
| |
| void LCodeGen::DoClassOfTestAndBranch(LClassOfTestAndBranch* instr) { |
| Register input = ToRegister(instr->value()); |
| Register temp = scratch0(); |
| Register temp2 = ToRegister(instr->temp()); |
| 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->value()); |
| Register temp = ToRegister(instr->temp()); |
| 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->left()).is(r0)); // Object is in r0. |
| ASSERT(ToRegister(instr->right()).is(r1)); // Function is in r1. |
| |
| InstanceofStub stub(InstanceofStub::kArgsInRegisters); |
| CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr); |
| |
| __ cmp(r0, Operand::Zero()); |
| __ mov(r0, Operand(factory()->false_value()), LeaveCC, ne); |
| __ mov(r0, Operand(factory()->true_value()), LeaveCC, eq); |
| } |
| |
| |
| void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) { |
| class DeferredInstanceOfKnownGlobal: public LDeferredCode { |
| public: |
| DeferredInstanceOfKnownGlobal(LCodeGen* codegen, |
| LInstanceOfKnownGlobal* instr) |
| : LDeferredCode(codegen), instr_(instr) { } |
| virtual void Generate() { |
| codegen()->DoDeferredInstanceOfKnownGlobal(instr_, &map_check_); |
| } |
| virtual LInstruction* instr() { return instr_; } |
| Label* map_check() { return &map_check_; } |
| private: |
| LInstanceOfKnownGlobal* instr_; |
| Label map_check_; |
| }; |
| |
| DeferredInstanceOfKnownGlobal* deferred; |
| deferred = new(zone()) DeferredInstanceOfKnownGlobal(this, instr); |
| |
| Label done, false_result; |
| Register object = ToRegister(instr->value()); |
| Register temp = ToRegister(instr->temp()); |
| 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)); |
| { |
| // Block constant pool emission to ensure the positions of instructions are |
| // as expected by the patcher. See InstanceofStub::Generate(). |
| Assembler::BlockConstPoolScope block_const_pool(masm()); |
| __ 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. |
| PredictableCodeSizeScope predictable(masm_, 5 * Assembler::kInstrSize); |
| Handle<Cell> cell = factory()->NewCell(factory()->the_hole_value()); |
| __ mov(ip, Operand(Handle<Object>(cell))); |
| __ ldr(ip, FieldMemOperand(ip, PropertyCell::kValueOffset)); |
| __ 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::DoDeferredInstanceOfKnownGlobal(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); |
| |
| PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters); |
| |
| // 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->temp()); |
| ASSERT(temp.is(r4)); |
| __ LoadHeapObject(InstanceofStub::right(), instr->function()); |
| static const int kAdditionalDelta = 5; |
| // Make sure that code size is predicable, since we use specific constants |
| // offsets in the code to find embedded values.. |
| PredictableCodeSizeScope predictable(masm_, 6 * Assembler::kInstrSize); |
| int delta = masm_->InstructionsGeneratedSince(map_check) + kAdditionalDelta; |
| Label before_push_delta; |
| __ bind(&before_push_delta); |
| __ BlockConstPoolFor(kAdditionalDelta); |
| __ mov(temp, Operand(delta * kPointerSize)); |
| // The mov above can generate one or two instructions. The delta was computed |
| // for two instructions, so we need to pad here in case of one instruction. |
| if (masm_->InstructionsGeneratedSince(&before_push_delta) != 2) { |
| ASSERT_EQ(1, masm_->InstructionsGeneratedSince(&before_push_delta)); |
| __ nop(); |
| } |
| __ StoreToSafepointRegisterSlot(temp, temp); |
| CallCodeGeneric(stub.GetCode(isolate()), |
| RelocInfo::CODE_TARGET, |
| instr, |
| RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS); |
| LEnvironment* env = instr->GetDeferredLazyDeoptimizationEnvironment(); |
| safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index()); |
| // Put the result value into the result register slot and |
| // restore all registers. |
| __ StoreToSafepointRegisterSlot(result, result); |
| } |
| |
| |
| void LCodeGen::DoInstanceSize(LInstanceSize* instr) { |
| Register object = ToRegister(instr->object()); |
| Register result = ToRegister(instr->result()); |
| __ ldr(result, FieldMemOperand(object, HeapObject::kMapOffset)); |
| __ ldrb(result, FieldMemOperand(result, Map::kInstanceSizeOffset)); |
| } |
| |
| |
| void LCodeGen::DoCmpT(LCmpT* instr) { |
| Token::Value op = instr->op(); |
| |
| Handle<Code> ic = CompareIC::GetUninitialized(isolate(), op); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr); |
| // This instruction also signals no smi code inlined. |
| __ cmp(r0, Operand::Zero()); |
| |
| Condition condition = ComputeCompareCondition(op); |
| __ LoadRoot(ToRegister(instr->result()), |
| Heap::kTrueValueRootIndex, |
| condition); |
| __ LoadRoot(ToRegister(instr->result()), |
| Heap::kFalseValueRootIndex, |
| NegateCondition(condition)); |
| } |
| |
| |
| void LCodeGen::DoReturn(LReturn* instr) { |
| if (FLAG_trace && info()->IsOptimizing()) { |
| // Push the return value on the stack as the parameter. |
| // Runtime::TraceExit returns its parameter in r0. |
| __ push(r0); |
| __ CallRuntime(Runtime::kTraceExit, 1); |
| } |
| if (info()->saves_caller_doubles()) { |
| ASSERT(NeedsEagerFrame()); |
| BitVector* doubles = chunk()->allocated_double_registers(); |
| BitVector::Iterator save_iterator(doubles); |
| int count = 0; |
| while (!save_iterator.Done()) { |
| __ vldr(DwVfpRegister::FromAllocationIndex(save_iterator.Current()), |
| MemOperand(sp, count * kDoubleSize)); |
| save_iterator.Advance(); |
| count++; |
| } |
| } |
| int no_frame_start = -1; |
| if (NeedsEagerFrame()) { |
| __ mov(sp, fp); |
| no_frame_start = masm_->pc_offset(); |
| __ ldm(ia_w, sp, fp.bit() | lr.bit()); |
| } |
| if (instr->has_constant_parameter_count()) { |
| int parameter_count = ToInteger32(instr->constant_parameter_count()); |
| int32_t sp_delta = (parameter_count + 1) * kPointerSize; |
| if (sp_delta != 0) { |
| __ add(sp, sp, Operand(sp_delta)); |
| } |
| } else { |
| Register reg = ToRegister(instr->parameter_count()); |
| // The argument count parameter is a smi |
| __ SmiUntag(reg); |
| __ add(sp, sp, Operand(reg, LSL, kPointerSizeLog2)); |
| } |
| |
| __ Jump(lr); |
| |
| if (no_frame_start != -1) { |
| info_->AddNoFrameRange(no_frame_start, masm_->pc_offset()); |
| } |
| } |
| |
| |
| void LCodeGen::DoLoadGlobalCell(LLoadGlobalCell* instr) { |
| Register result = ToRegister(instr->result()); |
| __ mov(ip, Operand(Handle<Object>(instr->hydrogen()->cell()))); |
| __ ldr(result, FieldMemOperand(ip, Cell::kValueOffset)); |
| if (instr->hydrogen()->RequiresHoleCheck()) { |
| __ 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 = isolate()->builtins()->LoadIC_Initialize(); |
| CallCode(ic, mode, instr); |
| } |
| |
| |
| void LCodeGen::DoStoreGlobalCell(LStoreGlobalCell* instr) { |
| Register value = ToRegister(instr->value()); |
| Register cell = scratch0(); |
| |
| // Load the cell. |
| __ mov(cell, Operand(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()->RequiresHoleCheck()) { |
| // We use a temp to check the payload (CompareRoot might clobber ip). |
| Register payload = ToRegister(instr->temp()); |
| __ ldr(payload, FieldMemOperand(cell, Cell::kValueOffset)); |
| __ CompareRoot(payload, Heap::kTheHoleValueRootIndex); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| |
| // Store the value. |
| __ str(value, FieldMemOperand(cell, Cell::kValueOffset)); |
| // Cells are always rescanned, so no write barrier here. |
| } |
| |
| |
| void LCodeGen::DoStoreGlobalGeneric(LStoreGlobalGeneric* instr) { |
| ASSERT(ToRegister(instr->global_object()).is(r1)); |
| ASSERT(ToRegister(instr->value()).is(r0)); |
| |
| __ mov(r2, Operand(instr->name())); |
| Handle<Code> ic = (instr->strict_mode_flag() == kStrictMode) |
| ? isolate()->builtins()->StoreIC_Initialize_Strict() |
| : isolate()->builtins()->StoreIC_Initialize(); |
| CallCode(ic, RelocInfo::CODE_TARGET_CONTEXT, instr); |
| } |
| |
| |
| void LCodeGen::DoLoadContextSlot(LLoadContextSlot* instr) { |
| Register context = ToRegister(instr->context()); |
| Register result = ToRegister(instr->result()); |
| __ ldr(result, ContextOperand(context, instr->slot_index())); |
| if (instr->hydrogen()->RequiresHoleCheck()) { |
| __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| __ cmp(result, ip); |
| if (instr->hydrogen()->DeoptimizesOnHole()) { |
| DeoptimizeIf(eq, instr->environment()); |
| } else { |
| __ mov(result, Operand(factory()->undefined_value()), LeaveCC, eq); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoStoreContextSlot(LStoreContextSlot* instr) { |
| Register context = ToRegister(instr->context()); |
| Register value = ToRegister(instr->value()); |
| Register scratch = scratch0(); |
| MemOperand target = ContextOperand(context, instr->slot_index()); |
| |
| Label skip_assignment; |
| |
| if (instr->hydrogen()->RequiresHoleCheck()) { |
| __ ldr(scratch, target); |
| __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| __ cmp(scratch, ip); |
| if (instr->hydrogen()->DeoptimizesOnHole()) { |
| DeoptimizeIf(eq, instr->environment()); |
| } else { |
| __ b(ne, &skip_assignment); |
| } |
| } |
| |
| __ str(value, target); |
| if (instr->hydrogen()->NeedsWriteBarrier()) { |
| HType type = instr->hydrogen()->value()->type(); |
| SmiCheck check_needed = |
| type.IsHeapObject() ? OMIT_SMI_CHECK : INLINE_SMI_CHECK; |
| __ RecordWriteContextSlot(context, |
| target.offset(), |
| value, |
| scratch, |
| GetLinkRegisterState(), |
| kSaveFPRegs, |
| EMIT_REMEMBERED_SET, |
| check_needed); |
| } |
| |
| __ bind(&skip_assignment); |
| } |
| |
| |
| void LCodeGen::DoLoadNamedField(LLoadNamedField* instr) { |
| HObjectAccess access = instr->hydrogen()->access(); |
| int offset = access.offset(); |
| Register object = ToRegister(instr->object()); |
| if (instr->hydrogen()->representation().IsDouble()) { |
| DwVfpRegister result = ToDoubleRegister(instr->result()); |
| __ vldr(result, FieldMemOperand(object, offset)); |
| return; |
| } |
| |
| Register result = ToRegister(instr->result()); |
| if (access.IsInobject()) { |
| __ ldr(result, FieldMemOperand(object, offset)); |
| } else { |
| __ ldr(result, FieldMemOperand(object, JSObject::kPropertiesOffset)); |
| __ ldr(result, FieldMemOperand(result, offset)); |
| } |
| } |
| |
| |
| void LCodeGen::EmitLoadFieldOrConstantFunction(Register result, |
| Register object, |
| Handle<Map> type, |
| Handle<String> name, |
| LEnvironment* env) { |
| LookupResult lookup(isolate()); |
| type->LookupDescriptor(NULL, *name, &lookup); |
| ASSERT(lookup.IsFound() || lookup.IsCacheable()); |
| if (lookup.IsField()) { |
| int index = lookup.GetLocalFieldIndexFromMap(*type); |
| int offset = index * kPointerSize; |
| if (index < 0) { |
| // Negative property indices are in-object properties, indexed |
| // from the end of the fixed part of the object. |
| __ ldr(result, FieldMemOperand(object, offset + type->instance_size())); |
| } else { |
| // Non-negative property indices are in the properties array. |
| __ ldr(result, FieldMemOperand(object, JSObject::kPropertiesOffset)); |
| __ ldr(result, FieldMemOperand(result, offset + FixedArray::kHeaderSize)); |
| } |
| } else if (lookup.IsConstantFunction()) { |
| Handle<JSFunction> function(lookup.GetConstantFunctionFromMap(*type)); |
| __ LoadHeapObject(result, function); |
| } else { |
| // Negative lookup. |
| // Check prototypes. |
| Handle<HeapObject> current(HeapObject::cast((*type)->prototype())); |
| Heap* heap = type->GetHeap(); |
| while (*current != heap->null_value()) { |
| __ LoadHeapObject(result, current); |
| __ ldr(result, FieldMemOperand(result, HeapObject::kMapOffset)); |
| __ cmp(result, Operand(Handle<Map>(current->map()))); |
| DeoptimizeIf(ne, env); |
| current = |
| Handle<HeapObject>(HeapObject::cast(current->map()->prototype())); |
| } |
| __ LoadRoot(result, Heap::kUndefinedValueRootIndex); |
| } |
| } |
| |
| |
| void LCodeGen::DoLoadNamedFieldPolymorphic(LLoadNamedFieldPolymorphic* instr) { |
| Register object = ToRegister(instr->object()); |
| Register result = ToRegister(instr->result()); |
| Register object_map = scratch0(); |
| |
| int map_count = instr->hydrogen()->types()->length(); |
| bool need_generic = instr->hydrogen()->need_generic(); |
| |
| if (map_count == 0 && !need_generic) { |
| DeoptimizeIf(al, instr->environment()); |
| return; |
| } |
| Handle<String> name = instr->hydrogen()->name(); |
| Label done; |
| __ ldr(object_map, FieldMemOperand(object, HeapObject::kMapOffset)); |
| for (int i = 0; i < map_count; ++i) { |
| bool last = (i == map_count - 1); |
| Handle<Map> map = instr->hydrogen()->types()->at(i); |
| Label check_passed; |
| __ CompareMap(object_map, map, &check_passed); |
| if (last && !need_generic) { |
| DeoptimizeIf(ne, instr->environment()); |
| __ bind(&check_passed); |
| EmitLoadFieldOrConstantFunction( |
| result, object, map, name, instr->environment()); |
| } else { |
| Label next; |
| __ b(ne, &next); |
| __ bind(&check_passed); |
| EmitLoadFieldOrConstantFunction( |
| result, object, map, name, instr->environment()); |
| __ b(&done); |
| __ bind(&next); |
| } |
| } |
| if (need_generic) { |
| __ mov(r2, Operand(name)); |
| Handle<Code> ic = isolate()->builtins()->LoadIC_Initialize(); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr, NEVER_INLINE_TARGET_ADDRESS); |
| } |
| __ bind(&done); |
| } |
| |
| |
| 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 = isolate()->builtins()->LoadIC_Initialize(); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr, NEVER_INLINE_TARGET_ADDRESS); |
| } |
| |
| |
| 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::DoLoadExternalArrayPointer( |
| LLoadExternalArrayPointer* instr) { |
| Register to_reg = ToRegister(instr->result()); |
| Register from_reg = ToRegister(instr->object()); |
| __ ldr(to_reg, FieldMemOperand(from_reg, |
| ExternalArray::kExternalPointerOffset)); |
| } |
| |
| |
| void LCodeGen::DoAccessArgumentsAt(LAccessArgumentsAt* instr) { |
| Register arguments = ToRegister(instr->arguments()); |
| Register result = ToRegister(instr->result()); |
| if (instr->length()->IsConstantOperand() && |
| instr->index()->IsConstantOperand()) { |
| int const_index = ToInteger32(LConstantOperand::cast(instr->index())); |
| int const_length = ToInteger32(LConstantOperand::cast(instr->length())); |
| int index = (const_length - const_index) + 1; |
| __ ldr(result, MemOperand(arguments, index * kPointerSize)); |
| } else { |
| Register length = ToRegister(instr->length()); |
| Register index = ToRegister(instr->index()); |
| // There are two words between the frame pointer and the last argument. |
| // Subtracting from length accounts for one of them add one more. |
| __ sub(length, length, index); |
| __ add(length, length, Operand(1)); |
| __ ldr(result, MemOperand(arguments, length, LSL, kPointerSizeLog2)); |
| } |
| } |
| |
| |
| void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) { |
| Register external_pointer = ToRegister(instr->elements()); |
| Register key = no_reg; |
| ElementsKind elements_kind = instr->elements_kind(); |
| bool key_is_constant = instr->key()->IsConstantOperand(); |
| int constant_key = 0; |
| if (key_is_constant) { |
| constant_key = ToInteger32(LConstantOperand::cast(instr->key())); |
| if (constant_key & 0xF0000000) { |
| Abort("array index constant value too big."); |
| } |
| } else { |
| key = ToRegister(instr->key()); |
| } |
| int element_size_shift = ElementsKindToShiftSize(elements_kind); |
| int shift_size = (instr->hydrogen()->key()->representation().IsSmi()) |
| ? (element_size_shift - kSmiTagSize) : element_size_shift; |
| int additional_offset = instr->additional_index() << element_size_shift; |
| |
| if (elements_kind == EXTERNAL_FLOAT_ELEMENTS || |
| elements_kind == EXTERNAL_DOUBLE_ELEMENTS) { |
| DwVfpRegister result = ToDoubleRegister(instr->result()); |
| Operand operand = key_is_constant |
| ? Operand(constant_key << element_size_shift) |
| : Operand(key, LSL, shift_size); |
| __ add(scratch0(), external_pointer, operand); |
| if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) { |
| __ vldr(kScratchDoubleReg.low(), scratch0(), additional_offset); |
| __ vcvt_f64_f32(result, kScratchDoubleReg.low()); |
| } else { // i.e. elements_kind == EXTERNAL_DOUBLE_ELEMENTS |
| __ vldr(result, scratch0(), additional_offset); |
| } |
| } else { |
| Register result = ToRegister(instr->result()); |
| MemOperand mem_operand = PrepareKeyedOperand( |
| key, external_pointer, key_is_constant, constant_key, |
| element_size_shift, shift_size, |
| instr->additional_index(), additional_offset); |
| switch (elements_kind) { |
| case EXTERNAL_BYTE_ELEMENTS: |
| __ ldrsb(result, mem_operand); |
| break; |
| case EXTERNAL_PIXEL_ELEMENTS: |
| case EXTERNAL_UNSIGNED_BYTE_ELEMENTS: |
| __ ldrb(result, mem_operand); |
| break; |
| case EXTERNAL_SHORT_ELEMENTS: |
| __ ldrsh(result, mem_operand); |
| break; |
| case EXTERNAL_UNSIGNED_SHORT_ELEMENTS: |
| __ ldrh(result, mem_operand); |
| break; |
| case EXTERNAL_INT_ELEMENTS: |
| __ ldr(result, mem_operand); |
| break; |
| case EXTERNAL_UNSIGNED_INT_ELEMENTS: |
| __ ldr(result, mem_operand); |
| if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) { |
| __ cmp(result, Operand(0x80000000)); |
| DeoptimizeIf(cs, instr->environment()); |
| } |
| break; |
| case EXTERNAL_FLOAT_ELEMENTS: |
| case EXTERNAL_DOUBLE_ELEMENTS: |
| case FAST_HOLEY_DOUBLE_ELEMENTS: |
| case FAST_HOLEY_ELEMENTS: |
| case FAST_HOLEY_SMI_ELEMENTS: |
| case FAST_DOUBLE_ELEMENTS: |
| case FAST_ELEMENTS: |
| case FAST_SMI_ELEMENTS: |
| case DICTIONARY_ELEMENTS: |
| case NON_STRICT_ARGUMENTS_ELEMENTS: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr) { |
| Register elements = ToRegister(instr->elements()); |
| bool key_is_constant = instr->key()->IsConstantOperand(); |
| Register key = no_reg; |
| DwVfpRegister result = ToDoubleRegister(instr->result()); |
| Register scratch = scratch0(); |
| |
| int element_size_shift = ElementsKindToShiftSize(FAST_DOUBLE_ELEMENTS); |
| int shift_size = (instr->hydrogen()->key()->representation().IsSmi()) |
| ? (element_size_shift - kSmiTagSize) : element_size_shift; |
| int constant_key = 0; |
| if (key_is_constant) { |
| constant_key = ToInteger32(LConstantOperand::cast(instr->key())); |
| if (constant_key & 0xF0000000) { |
| Abort("array index constant value too big."); |
| } |
| } else { |
| key = ToRegister(instr->key()); |
| } |
| |
| int base_offset = (FixedDoubleArray::kHeaderSize - kHeapObjectTag) + |
| ((constant_key + instr->additional_index()) << element_size_shift); |
| if (!key_is_constant) { |
| __ add(elements, elements, Operand(key, LSL, shift_size)); |
| } |
| __ add(elements, elements, Operand(base_offset)); |
| __ vldr(result, elements, 0); |
| if (instr->hydrogen()->RequiresHoleCheck()) { |
| __ ldr(scratch, MemOperand(elements, sizeof(kHoleNanLower32))); |
| __ cmp(scratch, Operand(kHoleNanUpper32)); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| } |
| |
| |
| void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) { |
| Register elements = ToRegister(instr->elements()); |
| Register result = ToRegister(instr->result()); |
| Register scratch = scratch0(); |
| Register store_base = scratch; |
| int offset = 0; |
| |
| if (instr->key()->IsConstantOperand()) { |
| LConstantOperand* const_operand = LConstantOperand::cast(instr->key()); |
| offset = FixedArray::OffsetOfElementAt(ToInteger32(const_operand) + |
| instr->additional_index()); |
| store_base = elements; |
| } else { |
| Register key = EmitLoadRegister(instr->key(), scratch0()); |
| // Even though the HLoadKeyed instruction forces the input |
| // representation for the key to be an integer, the input gets replaced |
| // during bound check elimination with the index argument to the bounds |
| // check, which can be tagged, so that case must be handled here, too. |
| if (instr->hydrogen()->key()->representation().IsSmi()) { |
| __ add(scratch, elements, Operand::PointerOffsetFromSmiKey(key)); |
| } else { |
| __ add(scratch, elements, Operand(key, LSL, kPointerSizeLog2)); |
| } |
| offset = FixedArray::OffsetOfElementAt(instr->additional_index()); |
| } |
| __ ldr(result, FieldMemOperand(store_base, offset)); |
| |
| // Check for the hole value. |
| if (instr->hydrogen()->RequiresHoleCheck()) { |
| if (IsFastSmiElementsKind(instr->hydrogen()->elements_kind())) { |
| __ SmiTst(result); |
| DeoptimizeIf(ne, instr->environment()); |
| } else { |
| __ LoadRoot(scratch, Heap::kTheHoleValueRootIndex); |
| __ cmp(result, scratch); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoLoadKeyed(LLoadKeyed* instr) { |
| if (instr->is_external()) { |
| DoLoadKeyedExternalArray(instr); |
| } else if (instr->hydrogen()->representation().IsDouble()) { |
| DoLoadKeyedFixedDoubleArray(instr); |
| } else { |
| DoLoadKeyedFixedArray(instr); |
| } |
| } |
| |
| |
| MemOperand LCodeGen::PrepareKeyedOperand(Register key, |
| Register base, |
| bool key_is_constant, |
| int constant_key, |
| int element_size, |
| int shift_size, |
| int additional_index, |
| int additional_offset) { |
| if (additional_index != 0 && !key_is_constant) { |
| additional_index *= 1 << (element_size - shift_size); |
| __ add(scratch0(), key, Operand(additional_index)); |
| } |
| |
| if (key_is_constant) { |
| return MemOperand(base, |
| (constant_key << element_size) + additional_offset); |
| } |
| |
| if (additional_index == 0) { |
| if (shift_size >= 0) { |
| return MemOperand(base, key, LSL, shift_size); |
| } else { |
| ASSERT_EQ(-1, shift_size); |
| return MemOperand(base, key, LSR, 1); |
| } |
| } |
| |
| if (shift_size >= 0) { |
| return MemOperand(base, scratch0(), LSL, shift_size); |
| } else { |
| ASSERT_EQ(-1, shift_size); |
| return MemOperand(base, scratch0(), LSR, 1); |
| } |
| } |
| |
| |
| void LCodeGen::DoLoadKeyedGeneric(LLoadKeyedGeneric* instr) { |
| ASSERT(ToRegister(instr->object()).is(r1)); |
| ASSERT(ToRegister(instr->key()).is(r0)); |
| |
| Handle<Code> ic = isolate()->builtins()->KeyedLoadIC_Initialize(); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr, NEVER_INLINE_TARGET_ADDRESS); |
| } |
| |
| |
| void LCodeGen::DoArgumentsElements(LArgumentsElements* instr) { |
| Register scratch = scratch0(); |
| Register result = ToRegister(instr->result()); |
| |
| if (instr->hydrogen()->from_inlined()) { |
| __ sub(result, sp, Operand(2 * kPointerSize)); |
| } else { |
| // 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->elements()); |
| 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::DoWrapReceiver(LWrapReceiver* instr) { |
| Register receiver = ToRegister(instr->receiver()); |
| Register function = ToRegister(instr->function()); |
| Register scratch = scratch0(); |
| |
| // If the receiver is null or undefined, we have to pass the global |
| // object as a receiver to normal functions. Values have to be |
| // passed unchanged to builtins and strict-mode functions. |
| Label global_object, receiver_ok; |
| |
| // Do not transform the receiver to object for strict mode |
| // functions. |
| __ ldr(scratch, |
| FieldMemOperand(function, JSFunction::kSharedFunctionInfoOffset)); |
| __ ldr(scratch, |
| FieldMemOperand(scratch, SharedFunctionInfo::kCompilerHintsOffset)); |
| __ tst(scratch, |
| Operand(1 << (SharedFunctionInfo::kStrictModeFunction + kSmiTagSize))); |
| __ b(ne, &receiver_ok); |
| |
| // Do not transform the receiver to object for builtins. |
| __ tst(scratch, Operand(1 << (SharedFunctionInfo::kNative + kSmiTagSize))); |
| __ b(ne, &receiver_ok); |
| |
| // Normal function. Replace undefined or null with global receiver. |
| __ 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. |
| __ SmiTst(receiver); |
| DeoptimizeIf(eq, instr->environment()); |
| __ CompareObjectType(receiver, scratch, scratch, FIRST_SPEC_OBJECT_TYPE); |
| DeoptimizeIf(lt, instr->environment()); |
| __ jmp(&receiver_ok); |
| |
| __ bind(&global_object); |
| __ ldr(receiver, GlobalObjectOperand()); |
| __ ldr(receiver, |
| FieldMemOperand(receiver, JSGlobalObject::kGlobalReceiverOffset)); |
| __ bind(&receiver_ok); |
| } |
| |
| |
| void LCodeGen::DoApplyArguments(LApplyArguments* instr) { |
| Register receiver = ToRegister(instr->receiver()); |
| Register function = ToRegister(instr->function()); |
| Register length = ToRegister(instr->length()); |
| Register elements = ToRegister(instr->elements()); |
| Register scratch = scratch0(); |
| ASSERT(receiver.is(r0)); // Used for parameter count. |
| ASSERT(function.is(r1)); // Required by InvokeFunction. |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| |
| // 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. |
| __ cmp(length, Operand::Zero()); |
| __ 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()); |
| LPointerMap* pointers = instr->pointer_map(); |
| RecordPosition(pointers->position()); |
| SafepointGenerator safepoint_generator( |
| this, pointers, Safepoint::kLazyDeopt); |
| // The number of arguments is stored in receiver which is r0, as expected |
| // by InvokeFunction. |
| ParameterCount actual(receiver); |
| __ InvokeFunction(function, actual, CALL_FUNCTION, |
| safepoint_generator, CALL_AS_METHOD); |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| } |
| |
| |
| void LCodeGen::DoPushArgument(LPushArgument* instr) { |
| LOperand* argument = instr->value(); |
| if (argument->IsDoubleRegister() || argument->IsDoubleStackSlot()) { |
| Abort("DoPushArgument not implemented for double type."); |
| } else { |
| Register argument_reg = EmitLoadRegister(argument, ip); |
| __ push(argument_reg); |
| } |
| } |
| |
| |
| void LCodeGen::DoDrop(LDrop* instr) { |
| __ Drop(instr->count()); |
| } |
| |
| |
| void LCodeGen::DoThisFunction(LThisFunction* instr) { |
| Register result = ToRegister(instr->result()); |
| __ ldr(result, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| } |
| |
| |
| void LCodeGen::DoContext(LContext* instr) { |
| // If there is a non-return use, the context must be moved to a register. |
| Register result = ToRegister(instr->result()); |
| for (HUseIterator it(instr->hydrogen()->uses()); !it.Done(); it.Advance()) { |
| if (!it.value()->IsReturn()) { |
| __ mov(result, cp); |
| return; |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoOuterContext(LOuterContext* instr) { |
| Register context = ToRegister(instr->context()); |
| Register result = ToRegister(instr->result()); |
| __ ldr(result, |
| MemOperand(context, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
| } |
| |
| |
| void LCodeGen::DoDeclareGlobals(LDeclareGlobals* instr) { |
| __ push(cp); // The context is the first argument. |
| __ LoadHeapObject(scratch0(), instr->hydrogen()->pairs()); |
| __ push(scratch0()); |
| __ mov(scratch0(), Operand(Smi::FromInt(instr->hydrogen()->flags()))); |
| __ push(scratch0()); |
| CallRuntime(Runtime::kDeclareGlobals, 3, instr); |
| } |
| |
| |
| void LCodeGen::DoGlobalObject(LGlobalObject* instr) { |
| Register result = ToRegister(instr->result()); |
| __ ldr(result, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX)); |
| } |
| |
| |
| void LCodeGen::DoGlobalReceiver(LGlobalReceiver* instr) { |
| Register global = ToRegister(instr->global_object()); |
| Register result = ToRegister(instr->result()); |
| __ ldr(result, FieldMemOperand(global, GlobalObject::kGlobalReceiverOffset)); |
| } |
| |
| |
| void LCodeGen::CallKnownFunction(Handle<JSFunction> function, |
| int formal_parameter_count, |
| int arity, |
| LInstruction* instr, |
| CallKind call_kind, |
| R1State r1_state) { |
| bool dont_adapt_arguments = |
| formal_parameter_count == SharedFunctionInfo::kDontAdaptArgumentsSentinel; |
| bool can_invoke_directly = |
| dont_adapt_arguments || formal_parameter_count == arity; |
| |
| LPointerMap* pointers = instr->pointer_map(); |
| RecordPosition(pointers->position()); |
| |
| if (can_invoke_directly) { |
| if (r1_state == R1_UNINITIALIZED) { |
| __ LoadHeapObject(r1, function); |
| } |
| |
| // 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 (dont_adapt_arguments) { |
| __ mov(r0, Operand(arity)); |
| } |
| |
| // Invoke function. |
| __ SetCallKind(r5, call_kind); |
| __ ldr(ip, FieldMemOperand(r1, JSFunction::kCodeEntryOffset)); |
| __ Call(ip); |
| |
| // Set up deoptimization. |
| RecordSafepointWithLazyDeopt(instr, RECORD_SIMPLE_SAFEPOINT); |
| } else { |
| SafepointGenerator generator(this, pointers, Safepoint::kLazyDeopt); |
| ParameterCount count(arity); |
| ParameterCount expected(formal_parameter_count); |
| __ InvokeFunction( |
| function, expected, count, CALL_FUNCTION, generator, call_kind); |
| } |
| |
| // Restore context. |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| } |
| |
| |
| void LCodeGen::DoCallConstantFunction(LCallConstantFunction* instr) { |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| CallKnownFunction(instr->hydrogen()->function(), |
| instr->hydrogen()->formal_parameter_count(), |
| instr->arity(), |
| instr, |
| CALL_AS_METHOD, |
| R1_UNINITIALIZED); |
| } |
| |
| |
| void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LMathAbs* instr) { |
| Register input = ToRegister(instr->value()); |
| Register result = ToRegister(instr->result()); |
| 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. |
| __ tst(exponent, Operand(HeapNumber::kSignMask)); |
| // Move the input to the result if necessary. |
| __ Move(result, input); |
| __ b(eq, &done); |
| |
| // Input is negative. Reverse its sign. |
| // Preserve the value of all registers. |
| { |
| PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters); |
| |
| // 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); |
| |
| CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, instr); |
| // 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, result); |
| } |
| |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::EmitIntegerMathAbs(LMathAbs* instr) { |
| Register input = ToRegister(instr->value()); |
| Register result = ToRegister(instr->result()); |
| __ cmp(input, Operand::Zero()); |
| __ Move(result, input, pl); |
| // 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(result, input, Operand::Zero(), SetCC, mi); |
| // Deoptimize on overflow. |
| DeoptimizeIf(vs, instr->environment()); |
| } |
| |
| |
| void LCodeGen::DoMathAbs(LMathAbs* instr) { |
| // Class for deferred case. |
| class DeferredMathAbsTaggedHeapNumber: public LDeferredCode { |
| public: |
| DeferredMathAbsTaggedHeapNumber(LCodeGen* codegen, LMathAbs* instr) |
| : LDeferredCode(codegen), instr_(instr) { } |
| virtual void Generate() { |
| codegen()->DoDeferredMathAbsTaggedHeapNumber(instr_); |
| } |
| virtual LInstruction* instr() { return instr_; } |
| private: |
| LMathAbs* instr_; |
| }; |
| |
| Representation r = instr->hydrogen()->value()->representation(); |
| if (r.IsDouble()) { |
| DwVfpRegister input = ToDoubleRegister(instr->value()); |
| DwVfpRegister result = ToDoubleRegister(instr->result()); |
| __ vabs(result, input); |
| } else if (r.IsInteger32()) { |
| EmitIntegerMathAbs(instr); |
| } else { |
| // Representation is tagged. |
| DeferredMathAbsTaggedHeapNumber* deferred = |
| new(zone()) DeferredMathAbsTaggedHeapNumber(this, instr); |
| Register input = ToRegister(instr->value()); |
| // Smi check. |
| __ JumpIfNotSmi(input, deferred->entry()); |
| // If smi, handle it directly. |
| EmitIntegerMathAbs(instr); |
| __ bind(deferred->exit()); |
| } |
| } |
| |
| |
| void LCodeGen::DoMathFloor(LMathFloor* instr) { |
| DwVfpRegister input = ToDoubleRegister(instr->value()); |
| Register result = ToRegister(instr->result()); |
| Register input_high = scratch0(); |
| Label done, exact; |
| |
| __ vmov(input_high, input.high()); |
| __ TryInt32Floor(result, input, input_high, double_scratch0(), &done, &exact); |
| DeoptimizeIf(al, instr->environment()); |
| |
| __ bind(&exact); |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| // Test for -0. |
| __ cmp(result, Operand::Zero()); |
| __ b(ne, &done); |
| __ cmp(input_high, Operand::Zero()); |
| DeoptimizeIf(mi, instr->environment()); |
| } |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoMathRound(LMathRound* instr) { |
| DwVfpRegister input = ToDoubleRegister(instr->value()); |
| Register result = ToRegister(instr->result()); |
| DwVfpRegister double_scratch1 = ToDoubleRegister(instr->temp()); |
| DwVfpRegister input_plus_dot_five = double_scratch1; |
| Register input_high = scratch0(); |
| DwVfpRegister dot_five = double_scratch0(); |
| Label convert, done; |
| |
| __ Vmov(dot_five, 0.5, scratch0()); |
| __ vabs(double_scratch1, input); |
| __ VFPCompareAndSetFlags(double_scratch1, dot_five); |
| // If input is in [-0.5, -0], the result is -0. |
| // If input is in [+0, +0.5[, the result is +0. |
| // If the input is +0.5, the result is 1. |
| __ b(hi, &convert); // Out of [-0.5, +0.5]. |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| __ vmov(input_high, input.high()); |
| __ cmp(input_high, Operand::Zero()); |
| DeoptimizeIf(mi, instr->environment()); // [-0.5, -0]. |
| } |
| __ VFPCompareAndSetFlags(input, dot_five); |
| __ mov(result, Operand(1), LeaveCC, eq); // +0.5. |
| // Remaining cases: [+0, +0.5[ or [-0.5, +0.5[, depending on |
| // flag kBailoutOnMinusZero. |
| __ mov(result, Operand::Zero(), LeaveCC, ne); |
| __ b(&done); |
| |
| __ bind(&convert); |
| __ vadd(input_plus_dot_five, input, dot_five); |
| __ vmov(input_high, input_plus_dot_five.high()); |
| // Reuse dot_five (double_scratch0) as we no longer need this value. |
| __ TryInt32Floor(result, input_plus_dot_five, input_high, double_scratch0(), |
| &done, &done); |
| DeoptimizeIf(al, instr->environment()); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoMathSqrt(LMathSqrt* instr) { |
| DwVfpRegister input = ToDoubleRegister(instr->value()); |
| DwVfpRegister result = ToDoubleRegister(instr->result()); |
| __ vsqrt(result, input); |
| } |
| |
| |
| void LCodeGen::DoMathPowHalf(LMathPowHalf* instr) { |
| DwVfpRegister input = ToDoubleRegister(instr->value()); |
| DwVfpRegister result = ToDoubleRegister(instr->result()); |
| DwVfpRegister temp = ToDoubleRegister(instr->temp()); |
| |
| // Note that according to ECMA-262 15.8.2.13: |
| // Math.pow(-Infinity, 0.5) == Infinity |
| // Math.sqrt(-Infinity) == NaN |
| Label done; |
| __ vmov(temp, -V8_INFINITY, scratch0()); |
| __ VFPCompareAndSetFlags(input, temp); |
| __ vneg(result, temp, eq); |
| __ b(&done, eq); |
| |
| // Add +0 to convert -0 to +0. |
| __ vadd(result, input, kDoubleRegZero); |
| __ vsqrt(result, result); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoPower(LPower* instr) { |
| Representation exponent_type = instr->hydrogen()->right()->representation(); |
| // Having marked this as a call, we can use any registers. |
| // Just make sure that the input/output registers are the expected ones. |
| ASSERT(!instr->right()->IsDoubleRegister() || |
| ToDoubleRegister(instr->right()).is(d2)); |
| ASSERT(!instr->right()->IsRegister() || |
| ToRegister(instr->right()).is(r2)); |
| ASSERT(ToDoubleRegister(instr->left()).is(d1)); |
| ASSERT(ToDoubleRegister(instr->result()).is(d3)); |
| |
| if (exponent_type.IsSmi()) { |
| MathPowStub stub(MathPowStub::TAGGED); |
| __ CallStub(&stub); |
| } else if (exponent_type.IsTagged()) { |
| Label no_deopt; |
| __ JumpIfSmi(r2, &no_deopt); |
| __ ldr(r7, FieldMemOperand(r2, HeapObject::kMapOffset)); |
| __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex); |
| __ cmp(r7, Operand(ip)); |
| DeoptimizeIf(ne, instr->environment()); |
| __ bind(&no_deopt); |
| MathPowStub stub(MathPowStub::TAGGED); |
| __ CallStub(&stub); |
| } else if (exponent_type.IsInteger32()) { |
| MathPowStub stub(MathPowStub::INTEGER); |
| __ CallStub(&stub); |
| } else { |
| ASSERT(exponent_type.IsDouble()); |
| MathPowStub stub(MathPowStub::DOUBLE); |
| __ CallStub(&stub); |
| } |
| } |
| |
| |
| void LCodeGen::DoRandom(LRandom* instr) { |
| class DeferredDoRandom: public LDeferredCode { |
| public: |
| DeferredDoRandom(LCodeGen* codegen, LRandom* instr) |
| : LDeferredCode(codegen), instr_(instr) { } |
| virtual void Generate() { codegen()->DoDeferredRandom(instr_); } |
| virtual LInstruction* instr() { return instr_; } |
| private: |
| LRandom* instr_; |
| }; |
| |
| DeferredDoRandom* deferred = new(zone()) DeferredDoRandom(this, instr); |
| |
| // Having marked this instruction as a call we can use any |
| // registers. |
| ASSERT(ToDoubleRegister(instr->result()).is(d7)); |
| ASSERT(ToRegister(instr->global_object()).is(r0)); |
| |
| static const int kSeedSize = sizeof(uint32_t); |
| STATIC_ASSERT(kPointerSize == kSeedSize); |
| |
| __ ldr(r0, FieldMemOperand(r0, GlobalObject::kNativeContextOffset)); |
| static const int kRandomSeedOffset = |
| FixedArray::kHeaderSize + Context::RANDOM_SEED_INDEX * kPointerSize; |
| __ ldr(r2, FieldMemOperand(r0, kRandomSeedOffset)); |
| // r2: FixedArray of the native context's random seeds |
| |
| // Load state[0]. |
| __ ldr(r1, FieldMemOperand(r2, ByteArray::kHeaderSize)); |
| __ cmp(r1, Operand::Zero()); |
| __ b(eq, deferred->entry()); |
| // Load state[1]. |
| __ ldr(r0, FieldMemOperand(r2, ByteArray::kHeaderSize + kSeedSize)); |
| // r1: state[0]. |
| // r0: state[1]. |
| |
| // state[0] = 18273 * (state[0] & 0xFFFF) + (state[0] >> 16) |
| __ and_(r3, r1, Operand(0xFFFF)); |
| __ mov(r4, Operand(18273)); |
| __ mul(r3, r3, r4); |
| __ add(r1, r3, Operand(r1, LSR, 16)); |
| // Save state[0]. |
| __ str(r1, FieldMemOperand(r2, ByteArray::kHeaderSize)); |
| |
| // state[1] = 36969 * (state[1] & 0xFFFF) + (state[1] >> 16) |
| __ and_(r3, r0, Operand(0xFFFF)); |
| __ mov(r4, Operand(36969)); |
| __ mul(r3, r3, r4); |
| __ add(r0, r3, Operand(r0, LSR, 16)); |
| // Save state[1]. |
| __ str(r0, FieldMemOperand(r2, ByteArray::kHeaderSize + kSeedSize)); |
| |
| // Random bit pattern = (state[0] << 14) + (state[1] & 0x3FFFF) |
| __ and_(r0, r0, Operand(0x3FFFF)); |
| __ add(r0, r0, Operand(r1, LSL, 14)); |
| |
| __ bind(deferred->exit()); |
| // 0x41300000 is the top half of 1.0 x 2^20 as a double. |
| // Create this constant using mov/orr to avoid PC relative load. |
| __ mov(r1, Operand(0x41000000)); |
| __ orr(r1, r1, Operand(0x300000)); |
| // Move 0x41300000xxxxxxxx (x = random bits) to VFP. |
| __ vmov(d7, r0, r1); |
| // Move 0x4130000000000000 to VFP. |
| __ mov(r0, Operand::Zero()); |
| __ vmov(d8, r0, r1); |
| // Subtract and store the result in the heap number. |
| __ vsub(d7, d7, d8); |
| } |
| |
| |
| void LCodeGen::DoDeferredRandom(LRandom* instr) { |
| __ PrepareCallCFunction(1, scratch0()); |
| __ CallCFunction(ExternalReference::random_uint32_function(isolate()), 1); |
| // Return value is in r0. |
| } |
| |
| |
| void LCodeGen::DoMathExp(LMathExp* instr) { |
| DwVfpRegister input = ToDoubleRegister(instr->value()); |
| DwVfpRegister result = ToDoubleRegister(instr->result()); |
| DwVfpRegister double_scratch1 = ToDoubleRegister(instr->double_temp()); |
| DwVfpRegister double_scratch2 = double_scratch0(); |
| Register temp1 = ToRegister(instr->temp1()); |
| Register temp2 = ToRegister(instr->temp2()); |
| |
| MathExpGenerator::EmitMathExp( |
| masm(), input, result, double_scratch1, double_scratch2, |
| temp1, temp2, scratch0()); |
| } |
| |
| |
| void LCodeGen::DoMathLog(LMathLog* instr) { |
| ASSERT(ToDoubleRegister(instr->result()).is(d2)); |
| TranscendentalCacheStub stub(TranscendentalCache::LOG, |
| TranscendentalCacheStub::UNTAGGED); |
| CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| void LCodeGen::DoMathTan(LMathTan* instr) { |
| ASSERT(ToDoubleRegister(instr->result()).is(d2)); |
| TranscendentalCacheStub stub(TranscendentalCache::TAN, |
| TranscendentalCacheStub::UNTAGGED); |
| CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| void LCodeGen::DoMathCos(LMathCos* instr) { |
| ASSERT(ToDoubleRegister(instr->result()).is(d2)); |
| TranscendentalCacheStub stub(TranscendentalCache::COS, |
| TranscendentalCacheStub::UNTAGGED); |
| CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| void LCodeGen::DoMathSin(LMathSin* instr) { |
| ASSERT(ToDoubleRegister(instr->result()).is(d2)); |
| TranscendentalCacheStub stub(TranscendentalCache::SIN, |
| TranscendentalCacheStub::UNTAGGED); |
| CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr); |
| } |
| |
| |
| void LCodeGen::DoInvokeFunction(LInvokeFunction* instr) { |
| ASSERT(ToRegister(instr->function()).is(r1)); |
| ASSERT(instr->HasPointerMap()); |
| |
| Handle<JSFunction> known_function = instr->hydrogen()->known_function(); |
| if (known_function.is_null()) { |
| LPointerMap* pointers = instr->pointer_map(); |
| RecordPosition(pointers->position()); |
| SafepointGenerator generator(this, pointers, Safepoint::kLazyDeopt); |
| ParameterCount count(instr->arity()); |
| __ InvokeFunction(r1, count, CALL_FUNCTION, generator, CALL_AS_METHOD); |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| } else { |
| CallKnownFunction(known_function, |
| instr->hydrogen()->formal_parameter_count(), |
| instr->arity(), |
| instr, |
| CALL_AS_METHOD, |
| R1_CONTAINS_TARGET); |
| } |
| } |
| |
| |
| void LCodeGen::DoCallKeyed(LCallKeyed* instr) { |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| |
| int arity = instr->arity(); |
| Handle<Code> ic = |
| isolate()->stub_cache()->ComputeKeyedCallInitialize(arity); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr, NEVER_INLINE_TARGET_ADDRESS); |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| } |
| |
| |
| void LCodeGen::DoCallNamed(LCallNamed* instr) { |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| |
| int arity = instr->arity(); |
| RelocInfo::Mode mode = RelocInfo::CODE_TARGET; |
| Handle<Code> ic = |
| isolate()->stub_cache()->ComputeCallInitialize(arity, mode); |
| __ mov(r2, Operand(instr->name())); |
| CallCode(ic, mode, instr, NEVER_INLINE_TARGET_ADDRESS); |
| // Restore context register. |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| } |
| |
| |
| void LCodeGen::DoCallFunction(LCallFunction* instr) { |
| ASSERT(ToRegister(instr->function()).is(r1)); |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| |
| int arity = instr->arity(); |
| CallFunctionStub stub(arity, NO_CALL_FUNCTION_FLAGS); |
| CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr); |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| } |
| |
| |
| void LCodeGen::DoCallGlobal(LCallGlobal* instr) { |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| |
| int arity = instr->arity(); |
| RelocInfo::Mode mode = RelocInfo::CODE_TARGET_CONTEXT; |
| Handle<Code> ic = |
| isolate()->stub_cache()->ComputeCallInitialize(arity, mode); |
| __ mov(r2, Operand(instr->name())); |
| CallCode(ic, mode, instr, NEVER_INLINE_TARGET_ADDRESS); |
| __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| } |
| |
| |
| void LCodeGen::DoCallKnownGlobal(LCallKnownGlobal* instr) { |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| CallKnownFunction(instr->hydrogen()->target(), |
| instr->hydrogen()->formal_parameter_count(), |
| instr->arity(), |
| instr, |
| CALL_AS_FUNCTION, |
| R1_UNINITIALIZED); |
| } |
| |
| |
| void LCodeGen::DoCallNew(LCallNew* instr) { |
| ASSERT(ToRegister(instr->constructor()).is(r1)); |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| |
| __ mov(r0, Operand(instr->arity())); |
| if (FLAG_optimize_constructed_arrays) { |
| // No cell in r2 for construct type feedback in optimized code |
| Handle<Object> undefined_value(isolate()->heap()->undefined_value(), |
| isolate()); |
| __ mov(r2, Operand(undefined_value)); |
| } |
| CallConstructStub stub(NO_CALL_FUNCTION_FLAGS); |
| CallCode(stub.GetCode(isolate()), RelocInfo::CONSTRUCT_CALL, instr); |
| } |
| |
| |
| void LCodeGen::DoCallNewArray(LCallNewArray* instr) { |
| ASSERT(ToRegister(instr->constructor()).is(r1)); |
| ASSERT(ToRegister(instr->result()).is(r0)); |
| ASSERT(FLAG_optimize_constructed_arrays); |
| |
| __ mov(r0, Operand(instr->arity())); |
| __ mov(r2, Operand(instr->hydrogen()->property_cell())); |
| ElementsKind kind = instr->hydrogen()->elements_kind(); |
| bool disable_allocation_sites = |
| (AllocationSiteInfo::GetMode(kind) == TRACK_ALLOCATION_SITE); |
| |
| if (instr->arity() == 0) { |
| ArrayNoArgumentConstructorStub stub(kind, disable_allocation_sites); |
| CallCode(stub.GetCode(isolate()), RelocInfo::CONSTRUCT_CALL, instr); |
| } else if (instr->arity() == 1) { |
| Label done; |
| if (IsFastPackedElementsKind(kind)) { |
| Label packed_case; |
| // We might need a change here |
| // look at the first argument |
| __ ldr(r5, MemOperand(sp, 0)); |
| __ cmp(r5, Operand::Zero()); |
| __ b(eq, &packed_case); |
| |
| ElementsKind holey_kind = GetHoleyElementsKind(kind); |
| ArraySingleArgumentConstructorStub stub(holey_kind, |
| disable_allocation_sites); |
| CallCode(stub.GetCode(isolate()), RelocInfo::CONSTRUCT_CALL, instr); |
| __ jmp(&done); |
| __ bind(&packed_case); |
| } |
| |
| ArraySingleArgumentConstructorStub stub(kind, disable_allocation_sites); |
| CallCode(stub.GetCode(isolate()), RelocInfo::CONSTRUCT_CALL, instr); |
| __ bind(&done); |
| } else { |
| ArrayNArgumentsConstructorStub stub(kind, disable_allocation_sites); |
| CallCode(stub.GetCode(isolate()), RelocInfo::CONSTRUCT_CALL, instr); |
| } |
| } |
| |
| |
| void LCodeGen::DoCallRuntime(LCallRuntime* instr) { |
| CallRuntime(instr->function(), instr->arity(), instr); |
| } |
| |
| |
| void LCodeGen::DoInnerAllocatedObject(LInnerAllocatedObject* instr) { |
| Register result = ToRegister(instr->result()); |
| Register base = ToRegister(instr->base_object()); |
| __ add(result, base, Operand(instr->offset())); |
| } |
| |
| |
| void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) { |
| Representation representation = instr->representation(); |
| |
| Register object = ToRegister(instr->object()); |
| Register scratch = scratch0(); |
| |
| HObjectAccess access = instr->hydrogen()->access(); |
| int offset = access.offset(); |
| |
| Handle<Map> transition = instr->transition(); |
| |
| if (FLAG_track_heap_object_fields && representation.IsHeapObject()) { |
| Register value = ToRegister(instr->value()); |
| if (!instr->hydrogen()->value()->type().IsHeapObject()) { |
| __ SmiTst(value); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| } else if (FLAG_track_double_fields && representation.IsDouble()) { |
| ASSERT(transition.is_null()); |
| ASSERT(access.IsInobject()); |
| ASSERT(!instr->hydrogen()->NeedsWriteBarrier()); |
| DwVfpRegister value = ToDoubleRegister(instr->value()); |
| __ vstr(value, FieldMemOperand(object, offset)); |
| return; |
| } |
| |
| if (!transition.is_null()) { |
| __ mov(scratch, Operand(transition)); |
| __ str(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| if (instr->hydrogen()->NeedsWriteBarrierForMap()) { |
| Register temp = ToRegister(instr->temp()); |
| // Update the write barrier for the map field. |
| __ RecordWriteField(object, |
| HeapObject::kMapOffset, |
| scratch, |
| temp, |
| GetLinkRegisterState(), |
| kSaveFPRegs, |
| OMIT_REMEMBERED_SET, |
| OMIT_SMI_CHECK); |
| } |
| } |
| |
| // Do the store. |
| Register value = ToRegister(instr->value()); |
| ASSERT(!object.is(value)); |
| HType type = instr->hydrogen()->value()->type(); |
| SmiCheck check_needed = |
| type.IsHeapObject() ? OMIT_SMI_CHECK : INLINE_SMI_CHECK; |
| if (access.IsInobject()) { |
| __ str(value, FieldMemOperand(object, offset)); |
| if (instr->hydrogen()->NeedsWriteBarrier()) { |
| // Update the write barrier for the object for in-object properties. |
| __ RecordWriteField(object, |
| offset, |
| value, |
| scratch, |
| GetLinkRegisterState(), |
| kSaveFPRegs, |
| EMIT_REMEMBERED_SET, |
| check_needed); |
| } |
| } else { |
| __ ldr(scratch, FieldMemOperand(object, JSObject::kPropertiesOffset)); |
| __ str(value, FieldMemOperand(scratch, offset)); |
| if (instr->hydrogen()->NeedsWriteBarrier()) { |
| // Update the write barrier for the properties array. |
| // object is used as a scratch register. |
| __ RecordWriteField(scratch, |
| offset, |
| value, |
| object, |
| GetLinkRegisterState(), |
| kSaveFPRegs, |
| EMIT_REMEMBERED_SET, |
| check_needed); |
| } |
| } |
| } |
| |
| |
| 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 = (instr->strict_mode_flag() == kStrictMode) |
| ? isolate()->builtins()->StoreIC_Initialize_Strict() |
| : isolate()->builtins()->StoreIC_Initialize(); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr, NEVER_INLINE_TARGET_ADDRESS); |
| } |
| |
| |
| void LCodeGen::DoBoundsCheck(LBoundsCheck* instr) { |
| if (instr->hydrogen()->skip_check()) return; |
| |
| if (instr->index()->IsConstantOperand()) { |
| int constant_index = |
| ToInteger32(LConstantOperand::cast(instr->index())); |
| if (instr->hydrogen()->length()->representation().IsSmi()) { |
| __ mov(ip, Operand(Smi::FromInt(constant_index))); |
| } else { |
| __ mov(ip, Operand(constant_index)); |
| } |
| __ cmp(ip, ToRegister(instr->length())); |
| } else { |
| __ cmp(ToRegister(instr->index()), ToRegister(instr->length())); |
| } |
| DeoptimizeIf(hs, instr->environment()); |
| } |
| |
| |
| void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) { |
| Register external_pointer = ToRegister(instr->elements()); |
| Register key = no_reg; |
| ElementsKind elements_kind = instr->elements_kind(); |
| bool key_is_constant = instr->key()->IsConstantOperand(); |
| int constant_key = 0; |
| if (key_is_constant) { |
| constant_key = ToInteger32(LConstantOperand::cast(instr->key())); |
| if (constant_key & 0xF0000000) { |
| Abort("array index constant value too big."); |
| } |
| } else { |
| key = ToRegister(instr->key()); |
| } |
| int element_size_shift = ElementsKindToShiftSize(elements_kind); |
| int shift_size = (instr->hydrogen()->key()->representation().IsSmi()) |
| ? (element_size_shift - kSmiTagSize) : element_size_shift; |
| int additional_offset = instr->additional_index() << element_size_shift; |
| |
| if (elements_kind == EXTERNAL_FLOAT_ELEMENTS || |
| elements_kind == EXTERNAL_DOUBLE_ELEMENTS) { |
| DwVfpRegister value(ToDoubleRegister(instr->value())); |
| Operand operand(key_is_constant |
| ? Operand(constant_key << element_size_shift) |
| : Operand(key, LSL, shift_size)); |
| __ add(scratch0(), external_pointer, operand); |
| if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) { |
| __ vcvt_f32_f64(double_scratch0().low(), value); |
| __ vstr(double_scratch0().low(), scratch0(), additional_offset); |
| } else { // i.e. elements_kind == EXTERNAL_DOUBLE_ELEMENTS |
| __ vstr(value, scratch0(), additional_offset); |
| } |
| } else { |
| Register value(ToRegister(instr->value())); |
| MemOperand mem_operand = PrepareKeyedOperand( |
| key, external_pointer, key_is_constant, constant_key, |
| element_size_shift, shift_size, |
| instr->additional_index(), additional_offset); |
| switch (elements_kind) { |
| case EXTERNAL_PIXEL_ELEMENTS: |
| case EXTERNAL_BYTE_ELEMENTS: |
| case EXTERNAL_UNSIGNED_BYTE_ELEMENTS: |
| __ strb(value, mem_operand); |
| break; |
| case EXTERNAL_SHORT_ELEMENTS: |
| case EXTERNAL_UNSIGNED_SHORT_ELEMENTS: |
| __ strh(value, mem_operand); |
| break; |
| case EXTERNAL_INT_ELEMENTS: |
| case EXTERNAL_UNSIGNED_INT_ELEMENTS: |
| __ str(value, mem_operand); |
| break; |
| case EXTERNAL_FLOAT_ELEMENTS: |
| case EXTERNAL_DOUBLE_ELEMENTS: |
| case FAST_DOUBLE_ELEMENTS: |
| case FAST_ELEMENTS: |
| case FAST_SMI_ELEMENTS: |
| case FAST_HOLEY_DOUBLE_ELEMENTS: |
| case FAST_HOLEY_ELEMENTS: |
| case FAST_HOLEY_SMI_ELEMENTS: |
| case DICTIONARY_ELEMENTS: |
| case NON_STRICT_ARGUMENTS_ELEMENTS: |
| UNREACHABLE(); |
| break; |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr) { |
| DwVfpRegister value = ToDoubleRegister(instr->value()); |
| Register elements = ToRegister(instr->elements()); |
| Register key = no_reg; |
| Register scratch = scratch0(); |
| bool key_is_constant = instr->key()->IsConstantOperand(); |
| int constant_key = 0; |
| |
| // Calculate the effective address of the slot in the array to store the |
| // double value. |
| if (key_is_constant) { |
| constant_key = ToInteger32(LConstantOperand::cast(instr->key())); |
| if (constant_key & 0xF0000000) { |
| Abort("array index constant value too big."); |
| } |
| } else { |
| key = ToRegister(instr->key()); |
| } |
| int element_size_shift = ElementsKindToShiftSize(FAST_DOUBLE_ELEMENTS); |
| int shift_size = (instr->hydrogen()->key()->representation().IsSmi()) |
| ? (element_size_shift - kSmiTagSize) : element_size_shift; |
| Operand operand = key_is_constant |
| ? Operand((constant_key << element_size_shift) + |
| FixedDoubleArray::kHeaderSize - kHeapObjectTag) |
| : Operand(key, LSL, shift_size); |
| __ add(scratch, elements, operand); |
| if (!key_is_constant) { |
| __ add(scratch, scratch, |
| Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag)); |
| } |
| |
| if (instr->NeedsCanonicalization()) { |
| // Force a canonical NaN. |
| if (masm()->emit_debug_code()) { |
| __ vmrs(ip); |
| __ tst(ip, Operand(kVFPDefaultNaNModeControlBit)); |
| __ Assert(ne, "Default NaN mode not set"); |
| } |
| __ VFPCanonicalizeNaN(value); |
| } |
| __ vstr(value, scratch, instr->additional_index() << element_size_shift); |
| } |
| |
| |
| void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) { |
| Register value = ToRegister(instr->value()); |
| Register elements = ToRegister(instr->elements()); |
| Register key = instr->key()->IsRegister() ? ToRegister(instr->key()) |
| : no_reg; |
| Register scratch = scratch0(); |
| Register store_base = scratch; |
| int offset = 0; |
| |
| // Do the store. |
| if (instr->key()->IsConstantOperand()) { |
| ASSERT(!instr->hydrogen()->NeedsWriteBarrier()); |
| LConstantOperand* const_operand = LConstantOperand::cast(instr->key()); |
| offset = FixedArray::OffsetOfElementAt(ToInteger32(const_operand) + |
| instr->additional_index()); |
| store_base = elements; |
| } else { |
| // Even though the HLoadKeyed instruction forces the input |
| // representation for the key to be an integer, the input gets replaced |
| // during bound check elimination with the index argument to the bounds |
| // check, which can be tagged, so that case must be handled here, too. |
| if (instr->hydrogen()->key()->representation().IsSmi()) { |
| __ add(scratch, elements, Operand::PointerOffsetFromSmiKey(key)); |
| } else { |
| __ add(scratch, elements, Operand(key, LSL, kPointerSizeLog2)); |
| } |
| offset = FixedArray::OffsetOfElementAt(instr->additional_index()); |
| } |
| __ str(value, FieldMemOperand(store_base, offset)); |
| |
| if (instr->hydrogen()->NeedsWriteBarrier()) { |
| HType type = instr->hydrogen()->value()->type(); |
| SmiCheck check_needed = |
| type.IsHeapObject() ? OMIT_SMI_CHECK : INLINE_SMI_CHECK; |
| // Compute address of modified element and store it into key register. |
| __ add(key, store_base, Operand(offset - kHeapObjectTag)); |
| __ RecordWrite(elements, |
| key, |
| value, |
| GetLinkRegisterState(), |
| kSaveFPRegs, |
| EMIT_REMEMBERED_SET, |
| check_needed); |
| } |
| } |
| |
| |
| void LCodeGen::DoStoreKeyed(LStoreKeyed* instr) { |
| // By cases: external, fast double |
| if (instr->is_external()) { |
| DoStoreKeyedExternalArray(instr); |
| } else if (instr->hydrogen()->value()->representation().IsDouble()) { |
| DoStoreKeyedFixedDoubleArray(instr); |
| } else { |
| DoStoreKeyedFixedArray(instr); |
| } |
| } |
| |
| |
| 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 = (instr->strict_mode_flag() == kStrictMode) |
| ? isolate()->builtins()->KeyedStoreIC_Initialize_Strict() |
| : isolate()->builtins()->KeyedStoreIC_Initialize(); |
| CallCode(ic, RelocInfo::CODE_TARGET, instr, NEVER_INLINE_TARGET_ADDRESS); |
| } |
| |
| |
| void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) { |
| Register object_reg = ToRegister(instr->object()); |
| Register scratch = scratch0(); |
| |
| Handle<Map> from_map = instr->original_map(); |
| Handle<Map> to_map = instr->transitioned_map(); |
| ElementsKind from_kind = instr->from_kind(); |
| ElementsKind to_kind = instr->to_kind(); |
| |
| Label not_applicable; |
| __ ldr(scratch, FieldMemOperand(object_reg, HeapObject::kMapOffset)); |
| __ cmp(scratch, Operand(from_map)); |
| __ b(ne, ¬_applicable); |
| |
| if (IsSimpleMapChangeTransition(from_kind, to_kind)) { |
| Register new_map_reg = ToRegister(instr->new_map_temp()); |
| __ mov(new_map_reg, Operand(to_map)); |
| __ str(new_map_reg, FieldMemOperand(object_reg, HeapObject::kMapOffset)); |
| // Write barrier. |
| __ RecordWriteField(object_reg, HeapObject::kMapOffset, new_map_reg, |
| scratch, GetLinkRegisterState(), kDontSaveFPRegs); |
| } else if (FLAG_compiled_transitions) { |
| PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters); |
| __ Move(r0, object_reg); |
| __ Move(r1, to_map); |
| TransitionElementsKindStub stub(from_kind, to_kind); |
| __ CallStub(&stub); |
| RecordSafepointWithRegisters( |
| instr->pointer_map(), 0, Safepoint::kNoLazyDeopt); |
| } else if (IsFastSmiElementsKind(from_kind) && |
| IsFastDoubleElementsKind(to_kind)) { |
| Register fixed_object_reg = ToRegister(instr->temp()); |
| ASSERT(fixed_object_reg.is(r2)); |
| Register new_map_reg = ToRegister(instr->new_map_temp()); |
| ASSERT(new_map_reg.is(r3)); |
| __ mov(new_map_reg, Operand(to_map)); |
| __ mov(fixed_object_reg, object_reg); |
| CallCode(isolate()->builtins()->TransitionElementsSmiToDouble(), |
| RelocInfo::CODE_TARGET, instr); |
| } else if (IsFastDoubleElementsKind(from_kind) && |
| IsFastObjectElementsKind(to_kind)) { |
| Register fixed_object_reg = ToRegister(instr->temp()); |
| ASSERT(fixed_object_reg.is(r2)); |
| Register new_map_reg = ToRegister(instr->new_map_temp()); |
| ASSERT(new_map_reg.is(r3)); |
| __ mov(new_map_reg, Operand(to_map)); |
| __ mov(fixed_object_reg, object_reg); |
| CallCode(isolate()->builtins()->TransitionElementsDoubleToObject(), |
| RelocInfo::CODE_TARGET, instr); |
| } else { |
| UNREACHABLE(); |
| } |
| __ bind(¬_applicable); |
| } |
| |
| |
| void LCodeGen::DoTrapAllocationMemento(LTrapAllocationMemento* instr) { |
| Register object = ToRegister(instr->object()); |
| Register temp = ToRegister(instr->temp()); |
| __ TestJSArrayForAllocationSiteInfo(object, temp); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| |
| |
| void LCodeGen::DoStringAdd(LStringAdd* instr) { |
| __ push(ToRegister(instr->left())); |
| __ push(ToRegister(instr->right())); |
| StringAddStub stub(NO_STRING_CHECK_IN_STUB); |
| CallCode(stub.GetCode(isolate()), 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_); } |
| virtual LInstruction* instr() { return instr_; } |
| private: |
| LStringCharCodeAt* instr_; |
| }; |
| |
| DeferredStringCharCodeAt* deferred = |
| new(zone()) DeferredStringCharCodeAt(this, instr); |
| |
| StringCharLoadGenerator::Generate(masm(), |
| ToRegister(instr->string()), |
| ToRegister(instr->index()), |
| ToRegister(instr->result()), |
| deferred->entry()); |
| __ bind(deferred->exit()); |
| } |
| |
| |
| void LCodeGen::DoDeferredStringCharCodeAt(LStringCharCodeAt* instr) { |
| Register string = ToRegister(instr->string()); |
| Register result = ToRegister(instr->result()); |
| 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::Zero()); |
| |
| PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters); |
| __ 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); |
| } |
| CallRuntimeFromDeferred(Runtime::kStringCharCodeAt, 2, instr); |
| __ AssertSmi(r0); |
| __ SmiUntag(r0); |
| __ StoreToSafepointRegisterSlot(r0, result); |
| } |
| |
| |
| 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_); } |
| virtual LInstruction* instr() { return instr_; } |
| private: |
| LStringCharFromCode* instr_; |
| }; |
| |
| DeferredStringCharFromCode* deferred = |
| new(zone()) 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::kMaxOneByteCharCode)); |
| __ 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::Zero()); |
| |
| PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters); |
| __ SmiTag(char_code); |
| __ push(char_code); |
| CallRuntimeFromDeferred(Runtime::kCharFromCode, 1, instr); |
| __ StoreToSafepointRegisterSlot(r0, result); |
| } |
| |
| |
| void LCodeGen::DoStringLength(LStringLength* instr) { |
| Register string = ToRegister(instr->string()); |
| Register result = ToRegister(instr->result()); |
| __ ldr(result, FieldMemOperand(string, String::kLengthOffset)); |
| } |
| |
| |
| void LCodeGen::DoInteger32ToDouble(LInteger32ToDouble* instr) { |
| LOperand* input = instr->value(); |
| 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::DoInteger32ToSmi(LInteger32ToSmi* instr) { |
| LOperand* input = instr->value(); |
| ASSERT(input->IsRegister()); |
| LOperand* output = instr->result(); |
| ASSERT(output->IsRegister()); |
| __ SmiTag(ToRegister(output), ToRegister(input), SetCC); |
| if (!instr->hydrogen()->value()->HasRange() || |
| !instr->hydrogen()->value()->range()->IsInSmiRange()) { |
| DeoptimizeIf(vs, instr->environment()); |
| } |
| } |
| |
| |
| void LCodeGen::DoUint32ToDouble(LUint32ToDouble* instr) { |
| LOperand* input = instr->value(); |
| LOperand* output = instr->result(); |
| |
| SwVfpRegister flt_scratch = double_scratch0().low(); |
| __ vmov(flt_scratch, ToRegister(input)); |
| __ vcvt_f64_u32(ToDoubleRegister(output), flt_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_, |
| instr_->value(), |
| SIGNED_INT32); |
| } |
| virtual LInstruction* instr() { return instr_; } |
| private: |
| LNumberTagI* instr_; |
| }; |
| |
| Register src = ToRegister(instr->value()); |
| Register dst = ToRegister(instr->result()); |
| |
| DeferredNumberTagI* deferred = new(zone()) DeferredNumberTagI(this, instr); |
| __ SmiTag(dst, src, SetCC); |
| __ b(vs, deferred->entry()); |
| __ bind(deferred->exit()); |
| } |
| |
| |
| void LCodeGen::DoNumberTagU(LNumberTagU* instr) { |
| class DeferredNumberTagU: public LDeferredCode { |
| public: |
| DeferredNumberTagU(LCodeGen* codegen, LNumberTagU* instr) |
| : LDeferredCode(codegen), instr_(instr) { } |
| virtual void Generate() { |
| codegen()->DoDeferredNumberTagI(instr_, |
| instr_->value(), |
| UNSIGNED_INT32); |
| } |
| virtual LInstruction* instr() { return instr_; } |
| private: |
| LNumberTagU* instr_; |
| }; |
| |
| LOperand* input = instr->value(); |
| ASSERT(input->IsRegister() && input->Equals(instr->result())); |
| Register reg = ToRegister(input); |
| |
| DeferredNumberTagU* deferred = new(zone()) DeferredNumberTagU(this, instr); |
| __ cmp(reg, Operand(Smi::kMaxValue)); |
| __ b(hi, deferred->entry()); |
| __ SmiTag(reg, reg); |
| __ bind(deferred->exit()); |
| } |
| |
| |
| void LCodeGen::DoDeferredNumberTagI(LInstruction* instr, |
| LOperand* value, |
| IntegerSignedness signedness) { |
| Label slow; |
| Register src = ToRegister(value); |
| Register dst = ToRegister(instr->result()); |
| DwVfpRegister dbl_scratch = double_scratch0(); |
| SwVfpRegister flt_scratch = dbl_scratch.low(); |
| |
| // Preserve the value of all registers. |
| PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters); |
| |
| Label done; |
| if (signedness == SIGNED_INT32) { |
| // 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. |
| if (dst.is(src)) { |
| __ SmiUntag(src, dst); |
| __ eor(src, src, Operand(0x80000000)); |
| } |
| __ vmov(flt_scratch, src); |
| __ vcvt_f64_s32(dbl_scratch, flt_scratch); |
| } else { |
| __ vmov(flt_scratch, src); |
| __ vcvt_f64_u32(dbl_scratch, flt_scratch); |
| } |
| |
| if (FLAG_inline_new) { |
| __ LoadRoot(scratch0(), Heap::kHeapNumberMapRootIndex); |
| __ AllocateHeapNumber(r5, r3, r4, scratch0(), &slow, DONT_TAG_RESULT); |
| __ Move(dst, 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::Zero()); |
| __ StoreToSafepointRegisterSlot(ip, dst); |
| CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, instr); |
| __ Move(dst, r0); |
| __ sub(dst, dst, Operand(kHeapObjectTag)); |
| |
| // Done. Put the value in dbl_scratch into the value of the allocated heap |
| // number. |
| __ bind(&done); |
| __ vstr(dbl_scratch, dst, HeapNumber::kValueOffset); |
| __ add(dst, dst, Operand(kHeapObjectTag)); |
| __ StoreToSafepointRegisterSlot(dst, dst); |
| } |
| |
| |
| 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_); } |
| virtual LInstruction* instr() { return instr_; } |
| private: |
| LNumberTagD* instr_; |
| }; |
| |
| DwVfpRegister input_reg = ToDoubleRegister(instr->value()); |
| Register scratch = scratch0(); |
| Register reg = ToRegister(instr->result()); |
| Register temp1 = ToRegister(instr->temp()); |
| Register temp2 = ToRegister(instr->temp2()); |
| |
| bool convert_hole = false; |
| HValue* change_input = instr->hydrogen()->value(); |
| if (change_input->IsLoadKeyed()) { |
| HLoadKeyed* load = HLoadKeyed::cast(change_input); |
| convert_hole = load->UsesMustHandleHole(); |
| } |
| |
| Label no_special_nan_handling; |
| Label done; |
| if (convert_hole) { |
| DwVfpRegister input_reg = ToDoubleRegister(instr->value()); |
| __ VFPCompareAndSetFlags(input_reg, input_reg); |
| __ b(vc, &no_special_nan_handling); |
| __ vmov(scratch, input_reg.high()); |
| __ cmp(scratch, Operand(kHoleNanUpper32)); |
| // If not the hole NaN, force the NaN to be canonical. |
| __ VFPCanonicalizeNaN(input_reg, ne); |
| __ b(ne, &no_special_nan_handling); |
| __ Move(reg, factory()->the_hole_value()); |
| __ b(&done); |
| } |
| |
| __ bind(&no_special_nan_handling); |
| DeferredNumberTagD* deferred = new(zone()) DeferredNumberTagD(this, instr); |
| if (FLAG_inline_new) { |
| __ LoadRoot(scratch, Heap::kHeapNumberMapRootIndex); |
| // We want the untagged address first for performance |
| __ AllocateHeapNumber(reg, temp1, temp2, scratch, deferred->entry(), |
| DONT_TAG_RESULT); |
| } else { |
| __ jmp(deferred->entry()); |
| } |
| __ bind(deferred->exit()); |
| __ vstr(input_reg, reg, HeapNumber::kValueOffset); |
| // Now that we have finished with the object's real address tag it |
| __ add(reg, reg, Operand(kHeapObjectTag)); |
| __ bind(&done); |
| } |
| |
| |
| 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::Zero()); |
| |
| PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters); |
| CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, instr); |
| __ sub(r0, r0, Operand(kHeapObjectTag)); |
| __ StoreToSafepointRegisterSlot(r0, reg); |
| } |
| |
| |
| void LCodeGen::DoSmiTag(LSmiTag* instr) { |
| ASSERT(!instr->hydrogen_value()->CheckFlag(HValue::kCanOverflow)); |
| __ SmiTag(ToRegister(instr->result()), ToRegister(instr->value())); |
| } |
| |
| |
| void LCodeGen::DoSmiUntag(LSmiUntag* instr) { |
| Register input = ToRegister(instr->value()); |
| Register result = ToRegister(instr->result()); |
| if (instr->needs_check()) { |
| STATIC_ASSERT(kHeapObjectTag == 1); |
| // If the input is a HeapObject, SmiUntag will set the carry flag. |
| __ SmiUntag(result, input, SetCC); |
| DeoptimizeIf(cs, instr->environment()); |
| } else { |
| __ SmiUntag(result, input); |
| } |
| } |
| |
| |
| void LCodeGen::EmitNumberUntagD(Register input_reg, |
| DwVfpRegister result_reg, |
| bool allow_undefined_as_nan, |
| bool deoptimize_on_minus_zero, |
| LEnvironment* env, |
| NumberUntagDMode mode) { |
| Register scratch = scratch0(); |
| SwVfpRegister flt_scratch = double_scratch0().low(); |
| ASSERT(!result_reg.is(double_scratch0())); |
| |
| Label load_smi, heap_number, done; |
| |
| STATIC_ASSERT(NUMBER_CANDIDATE_IS_ANY_TAGGED_CONVERT_HOLE > |
| NUMBER_CANDIDATE_IS_ANY_TAGGED); |
| if (mode >= NUMBER_CANDIDATE_IS_ANY_TAGGED) { |
| // Smi check. |
| __ UntagAndJumpIfSmi(scratch, input_reg, &load_smi); |
| |
| // Heap number map check. |
| __ ldr(scratch, FieldMemOperand(input_reg, HeapObject::kMapOffset)); |
| __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex); |
| __ cmp(scratch, Operand(ip)); |
| if (!allow_undefined_as_nan) { |
| DeoptimizeIf(ne, env); |
| } else { |
| Label heap_number, convert; |
| __ b(eq, &heap_number); |
| |
| // Convert undefined (and hole) to NaN. |
| __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| __ cmp(input_reg, Operand(ip)); |
| if (mode == NUMBER_CANDIDATE_IS_ANY_TAGGED_CONVERT_HOLE) { |
| __ b(eq, &convert); |
| __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| __ cmp(input_reg, Operand(ip)); |
| } |
| DeoptimizeIf(ne, env); |
| |
| __ bind(&convert); |
| __ LoadRoot(ip, Heap::kNanValueRootIndex); |
| __ sub(ip, ip, Operand(kHeapObjectTag)); |
| __ vldr(result_reg, ip, HeapNumber::kValueOffset); |
| __ jmp(&done); |
| |
| __ bind(&heap_number); |
| } |
| // Heap number to double register conversion. |
| __ sub(ip, input_reg, Operand(kHeapObjectTag)); |
| __ vldr(result_reg, ip, HeapNumber::kValueOffset); |
| if (deoptimize_on_minus_zero) { |
| __ vmov(ip, result_reg.low()); |
| __ cmp(ip, Operand::Zero()); |
| __ b(ne, &done); |
| __ vmov(ip, result_reg.high()); |
| __ cmp(ip, Operand(HeapNumber::kSignMask)); |
| DeoptimizeIf(eq, env); |
| } |
| __ jmp(&done); |
| } else { |
| __ SmiUntag(scratch, input_reg); |
| ASSERT(mode == NUMBER_CANDIDATE_IS_SMI); |
| } |
| |
| // Smi to double register conversion |
| __ bind(&load_smi); |
| // scratch: untagged value of input_reg |
| __ vmov(flt_scratch, scratch); |
| __ vcvt_f64_s32(result_reg, flt_scratch); |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr) { |
| Register input_reg = ToRegister(instr->value()); |
| Register scratch1 = scratch0(); |
| Register scratch2 = ToRegister(instr->temp()); |
| DwVfpRegister double_scratch = double_scratch0(); |
| DwVfpRegister double_scratch2 = ToDoubleRegister(instr->temp3()); |
| |
| ASSERT(!scratch1.is(input_reg) && !scratch1.is(scratch2)); |
| ASSERT(!scratch2.is(input_reg) && !scratch2.is(scratch1)); |
| |
| Label done; |
| |
| // The input was optimistically untagged; revert it. |
| // The carry flag is set when we reach this deferred code as we just executed |
| // SmiUntag(heap_object, SetCC) |
| STATIC_ASSERT(kHeapObjectTag == 1); |
| __ adc(input_reg, input_reg, Operand(input_reg)); |
| |
| // 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->temp2()); |
| 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::Zero()); |
| __ b(&done); |
| |
| __ bind(&heap_number); |
| __ sub(scratch1, input_reg, Operand(kHeapObjectTag)); |
| __ vldr(double_scratch2, scratch1, HeapNumber::kValueOffset); |
| |
| __ ECMAToInt32(input_reg, double_scratch2, |
| scratch1, scratch2, scratch3, double_scratch); |
| |
| } else { |
| // 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); |
| __ TryDoubleToInt32Exact(input_reg, double_scratch, double_scratch2); |
| DeoptimizeIf(ne, instr->environment()); |
| |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| __ cmp(input_reg, Operand::Zero()); |
| __ b(ne, &done); |
| __ vmov(scratch1, double_scratch.high()); |
| __ tst(scratch1, Operand(HeapNumber::kSignMask)); |
| DeoptimizeIf(ne, instr->environment()); |
| } |
| } |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoTaggedToI(LTaggedToI* instr) { |
| class DeferredTaggedToI: public LDeferredCode { |
| public: |
| DeferredTaggedToI(LCodeGen* codegen, LTaggedToI* instr) |
| : LDeferredCode(codegen), instr_(instr) { } |
| virtual void Generate() { codegen()->DoDeferredTaggedToI(instr_); } |
| virtual LInstruction* instr() { return instr_; } |
| private: |
| LTaggedToI* instr_; |
| }; |
| |
| LOperand* input = instr->value(); |
| ASSERT(input->IsRegister()); |
| ASSERT(input->Equals(instr->result())); |
| |
| Register input_reg = ToRegister(input); |
| |
| DeferredTaggedToI* deferred = new(zone()) DeferredTaggedToI(this, instr); |
| |
| // Optimistically untag the input. |
| // If the input is a HeapObject, SmiUntag will set the carry flag. |
| __ SmiUntag(input_reg, SetCC); |
| // Branch to deferred code if the input was tagged. |
| // The deferred code will take care of restoring the tag. |
| __ b(cs, deferred->entry()); |
| __ bind(deferred->exit()); |
| } |
| |
| |
| void LCodeGen::DoNumberUntagD(LNumberUntagD* instr) { |
| LOperand* input = instr->value(); |
| ASSERT(input->IsRegister()); |
| LOperand* result = instr->result(); |
| ASSERT(result->IsDoubleRegister()); |
| |
| Register input_reg = ToRegister(input); |
| DwVfpRegister result_reg = ToDoubleRegister(result); |
| |
| NumberUntagDMode mode = NUMBER_CANDIDATE_IS_ANY_TAGGED; |
| HValue* value = instr->hydrogen()->value(); |
| if (value->type().IsSmi()) { |
| mode = NUMBER_CANDIDATE_IS_SMI; |
| } else if (value->IsLoadKeyed()) { |
| HLoadKeyed* load = HLoadKeyed::cast(value); |
| if (load->UsesMustHandleHole()) { |
| if (load->hole_mode() == ALLOW_RETURN_HOLE) { |
| mode = NUMBER_CANDIDATE_IS_ANY_TAGGED_CONVERT_HOLE; |
| } |
| } |
| } |
| |
| EmitNumberUntagD(input_reg, result_reg, |
| instr->hydrogen()->allow_undefined_as_nan(), |
| instr->hydrogen()->deoptimize_on_minus_zero(), |
| instr->environment(), |
| mode); |
| } |
| |
| |
| void LCodeGen::DoDoubleToI(LDoubleToI* instr) { |
| Register result_reg = ToRegister(instr->result()); |
| Register scratch1 = scratch0(); |
| Register scratch2 = ToRegister(instr->temp()); |
| DwVfpRegister double_input = ToDoubleRegister(instr->value()); |
| DwVfpRegister double_scratch = double_scratch0(); |
| |
| if (instr->truncating()) { |
| Register scratch3 = ToRegister(instr->temp2()); |
| __ ECMAToInt32(result_reg, double_input, |
| scratch1, scratch2, scratch3, double_scratch); |
| } else { |
| __ TryDoubleToInt32Exact(result_reg, double_input, double_scratch); |
| // Deoptimize if the input wasn't a int32 (inside a double). |
| DeoptimizeIf(ne, instr->environment()); |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| Label done; |
| __ cmp(result_reg, Operand::Zero()); |
| __ b(ne, &done); |
| __ vmov(scratch1, double_input.high()); |
| __ tst(scratch1, Operand(HeapNumber::kSignMask)); |
| DeoptimizeIf(ne, instr->environment()); |
| __ bind(&done); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoDoubleToSmi(LDoubleToSmi* instr) { |
| Register result_reg = ToRegister(instr->result()); |
| Register scratch1 = scratch0(); |
| Register scratch2 = ToRegister(instr->temp()); |
| DwVfpRegister double_input = ToDoubleRegister(instr->value()); |
| DwVfpRegister double_scratch = double_scratch0(); |
| |
| if (instr->truncating()) { |
| Register scratch3 = ToRegister(instr->temp2()); |
| __ ECMAToInt32(result_reg, double_input, |
| scratch1, scratch2, scratch3, double_scratch); |
| } else { |
| __ TryDoubleToInt32Exact(result_reg, double_input, double_scratch); |
| // Deoptimize if the input wasn't a int32 (inside a double). |
| DeoptimizeIf(ne, instr->environment()); |
| if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) { |
| Label done; |
| __ cmp(result_reg, Operand::Zero()); |
| __ b(ne, &done); |
| __ vmov(scratch1, double_input.high()); |
| __ tst(scratch1, Operand(HeapNumber::kSignMask)); |
| DeoptimizeIf(ne, instr->environment()); |
| __ bind(&done); |
| } |
| } |
| __ SmiTag(result_reg, SetCC); |
| DeoptimizeIf(vs, instr->environment()); |
| } |
| |
| |
| void LCodeGen::DoCheckSmi(LCheckSmi* instr) { |
| LOperand* input = instr->value(); |
| __ SmiTst(ToRegister(input)); |
| DeoptimizeIf(ne, instr->environment()); |
| } |
| |
| |
| void LCodeGen::DoCheckNonSmi(LCheckNonSmi* instr) { |
| LOperand* input = instr->value(); |
| __ SmiTst(ToRegister(input)); |
| DeoptimizeIf(eq, instr->environment()); |
| } |
| |
| |
| void LCodeGen::DoCheckInstanceType(LCheckInstanceType* instr) { |
| Register input = ToRegister(instr->value()); |
| Register scratch = scratch0(); |
| |
| __ ldr(scratch, FieldMemOperand(input, HeapObject::kMapOffset)); |
| __ ldrb(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| |
| if (instr->hydrogen()->is_interval_check()) { |
| InstanceType first; |
| InstanceType last; |
| instr->hydrogen()->GetCheckInterval(&first, &last); |
| |
| __ 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()); |
| } |
| } |
| } else { |
| uint8_t mask; |
| uint8_t tag; |
| instr->hydrogen()->GetCheckMaskAndTag(&mask, &tag); |
| |
| if (IsPowerOf2(mask)) { |
| ASSERT(tag == 0 || IsPowerOf2(tag)); |
| __ tst(scratch, Operand(mask)); |
| DeoptimizeIf(tag == 0 ? ne : eq, instr->environment()); |
| } else { |
| __ and_(scratch, scratch, Operand(mask)); |
| __ cmp(scratch, Operand(tag)); |
| DeoptimizeIf(ne, instr->environment()); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoCheckFunction(LCheckFunction* instr) { |
| Register reg = ToRegister(instr->value()); |
| Handle<JSFunction> target = instr->hydrogen()->target(); |
| AllowDeferredHandleDereference smi_check; |
| if (isolate()->heap()->InNewSpace(*target)) { |
| Register reg = ToRegister(instr->value()); |
| Handle<Cell> cell = isolate()->factory()->NewPropertyCell(target); |
| __ mov(ip, Operand(Handle<Object>(cell))); |
| __ ldr(ip, FieldMemOperand(ip, Cell::kValueOffset)); |
| __ cmp(reg, ip); |
| } else { |
| __ cmp(reg, Operand(target)); |
| } |
| DeoptimizeIf(ne, instr->environment()); |
| } |
| |
| |
| void LCodeGen::DoCheckMapCommon(Register map_reg, |
| Handle<Map> map, |
| LEnvironment* env) { |
| Label success; |
| __ CompareMap(map_reg, map, &success); |
| DeoptimizeIf(ne, env); |
| __ bind(&success); |
| } |
| |
| |
| void LCodeGen::DoCheckMaps(LCheckMaps* instr) { |
| Register map_reg = scratch0(); |
| LOperand* input = instr->value(); |
| ASSERT(input->IsRegister()); |
| Register reg = ToRegister(input); |
| |
| Label success; |
| SmallMapList* map_set = instr->hydrogen()->map_set(); |
| __ ldr(map_reg, FieldMemOperand(reg, HeapObject::kMapOffset)); |
| for (int i = 0; i < map_set->length() - 1; i++) { |
| Handle<Map> map = map_set->at(i); |
| __ CompareMap(map_reg, map, &success); |
| __ b(eq, &success); |
| } |
| Handle<Map> map = map_set->last(); |
| DoCheckMapCommon(map_reg, map, instr->environment()); |
| __ bind(&success); |
| } |
| |
| |
| void LCodeGen::DoClampDToUint8(LClampDToUint8* instr) { |
| DwVfpRegister value_reg = ToDoubleRegister(instr->unclamped()); |
| Register result_reg = ToRegister(instr->result()); |
| DwVfpRegister temp_reg = ToDoubleRegister(instr->temp()); |
| __ ClampDoubleToUint8(result_reg, value_reg, temp_reg); |
| } |
| |
| |
| void LCodeGen::DoClampIToUint8(LClampIToUint8* instr) { |
| Register unclamped_reg = ToRegister(instr->unclamped()); |
| Register result_reg = ToRegister(instr->result()); |
| __ ClampUint8(result_reg, unclamped_reg); |
| } |
| |
| |
| void LCodeGen::DoClampTToUint8(LClampTToUint8* instr) { |
| Register scratch = scratch0(); |
| Register input_reg = ToRegister(instr->unclamped()); |
| Register result_reg = ToRegister(instr->result()); |
| DwVfpRegister temp_reg = ToDoubleRegister(instr->temp()); |
| Label is_smi, done, heap_number; |
| |
| // Both smi and heap number cases are handled. |
| __ UntagAndJumpIfSmi(result_reg, input_reg, &is_smi); |
| |
| // Check for heap number |
| __ ldr(scratch, FieldMemOperand(input_reg, HeapObject::kMapOffset)); |
| __ cmp(scratch, Operand(factory()->heap_number_map())); |
| __ b(eq, &heap_number); |
| |
| // Check for undefined. Undefined is converted to zero for clamping |
| // conversions. |
| __ cmp(input_reg, Operand(factory()->undefined_value())); |
| DeoptimizeIf(ne, instr->environment()); |
| __ mov(result_reg, Operand::Zero()); |
| __ jmp(&done); |
| |
| // Heap number |
| __ bind(&heap_number); |
| __ vldr(double_scratch0(), FieldMemOperand(input_reg, |
| HeapNumber::kValueOffset)); |
| __ ClampDoubleToUint8(result_reg, double_scratch0(), temp_reg); |
| __ jmp(&done); |
| |
| // smi |
| __ bind(&is_smi); |
| __ ClampUint8(result_reg, result_reg); |
| |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoCheckPrototypeMaps(LCheckPrototypeMaps* instr) { |
| Register prototype_reg = ToRegister(instr->temp()); |
| Register map_reg = ToRegister(instr->temp2()); |
| |
| ZoneList<Handle<JSObject> >* prototypes = instr->prototypes(); |
| ZoneList<Handle<Map> >* maps = instr->maps(); |
| |
| ASSERT(prototypes->length() == maps->length()); |
| |
| if (!instr->hydrogen()->CanOmitPrototypeChecks()) { |
| for (int i = 0; i < prototypes->length(); i++) { |
| __ LoadHeapObject(prototype_reg, prototypes->at(i)); |
| __ ldr(map_reg, FieldMemOperand(prototype_reg, HeapObject::kMapOffset)); |
| DoCheckMapCommon(map_reg, maps->at(i), instr->environment()); |
| } |
| } |
| } |
| |
| |
| void LCodeGen::DoAllocate(LAllocate* instr) { |
| class DeferredAllocate: public LDeferredCode { |
| public: |
| DeferredAllocate(LCodeGen* codegen, LAllocate* instr) |
| : LDeferredCode(codegen), instr_(instr) { } |
| virtual void Generate() { codegen()->DoDeferredAllocate(instr_); } |
| virtual LInstruction* instr() { return instr_; } |
| private: |
| LAllocate* instr_; |
| }; |
| |
| DeferredAllocate* deferred = |
| new(zone()) DeferredAllocate(this, instr); |
| |
| Register result = ToRegister(instr->result()); |
| Register scratch = ToRegister(instr->temp1()); |
| Register scratch2 = ToRegister(instr->temp2()); |
| |
| // Allocate memory for the object. |
| AllocationFlags flags = TAG_OBJECT; |
| if (instr->hydrogen()->MustAllocateDoubleAligned()) { |
| flags = static_cast<AllocationFlags>(flags | DOUBLE_ALIGNMENT); |
| } |
| if (instr->hydrogen()->CanAllocateInOldPointerSpace()) { |
| ASSERT(!instr->hydrogen()->CanAllocateInOldDataSpace()); |
| flags = static_cast<AllocationFlags>(flags | PRETENURE_OLD_POINTER_SPACE); |
| } else if (instr->hydrogen()->CanAllocateInOldDataSpace()) { |
| flags = static_cast<AllocationFlags>(flags | PRETENURE_OLD_DATA_SPACE); |
| } |
| |
| if (instr->size()->IsConstantOperand()) { |
| int32_t size = ToInteger32(LConstantOperand::cast(instr->size())); |
| __ Allocate(size, result, scratch, scratch2, deferred->entry(), flags); |
| } else { |
| Register size = ToRegister(instr->size()); |
| __ Allocate(size, |
| result, |
| scratch, |
| scratch2, |
| deferred->entry(), |
| flags); |
| } |
| |
| __ bind(deferred->exit()); |
| } |
| |
| |
| void LCodeGen::DoDeferredAllocate(LAllocate* instr) { |
| Register result = ToRegister(instr->result()); |
| |
| // TODO(3095996): Get rid of this. For now, we need to make the |
| // result register contain a valid pointer because it is already |
| // contained in the register pointer map. |
| __ mov(result, Operand(Smi::FromInt(0))); |
| |
| PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters); |
| if (instr->size()->IsRegister()) { |
| Register size = ToRegister(instr->size()); |
| ASSERT(!size.is(result)); |
| __ SmiTag(size); |
| __ push(size); |
| } else { |
| int32_t size = ToInteger32(LConstantOperand::cast(instr->size())); |
| __ Push(Smi::FromInt(size)); |
| } |
| |
| if (instr->hydrogen()->CanAllocateInOldPointerSpace()) { |
| ASSERT(!instr->hydrogen()->CanAllocateInOldDataSpace()); |
| CallRuntimeFromDeferred(Runtime::kAllocateInOldPointerSpace, 1, instr); |
| } else if (instr->hydrogen()->CanAllocateInOldDataSpace()) { |
| CallRuntimeFromDeferred(Runtime::kAllocateInOldDataSpace, 1, instr); |
| } else { |
| CallRuntimeFromDeferred(Runtime::kAllocateInNewSpace, 1, instr); |
| } |
| __ StoreToSafepointRegisterSlot(r0, result); |
| } |
| |
| |
| void LCodeGen::DoToFastProperties(LToFastProperties* instr) { |
| ASSERT(ToRegister(instr->value()).is(r0)); |
| __ push(r0); |
| CallRuntime(Runtime::kToFastProperties, 1, instr); |
| } |
| |
| |
| void LCodeGen::DoRegExpLiteral(LRegExpLiteral* instr) { |
| Label materialized; |
| // Registers will be used as follows: |
| // r7 = literals array. |
| // r1 = regexp literal. |
| // r0 = regexp literal clone. |
| // r2 and r4-r6 are used as temporaries. |
| int literal_offset = |
| FixedArray::OffsetOfElementAt(instr->hydrogen()->literal_index()); |
| __ LoadHeapObject(r7, instr->hydrogen()->literals()); |
| __ 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; |
| |
| __ Allocate(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. |
| __ CopyFields(r0, r1, double_scratch0(), double_scratch0().low(), |
| 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. |
| bool pretenure = instr->hydrogen()->pretenure(); |
| if (!pretenure && instr->hydrogen()->has_no_literals()) { |
| FastNewClosureStub stub(instr->hydrogen()->language_mode(), |
| instr->hydrogen()->is_generator()); |
| __ mov(r1, Operand(instr->hydrogen()->shared_info())); |
| __ push(r1); |
| CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr); |
| } else { |
| __ mov(r2, Operand(instr->hydrogen()->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->value()); |
| __ push(input); |
| CallRuntime(Runtime::kTypeof, 1, instr); |
| } |
| |
| |
| void LCodeGen::DoTypeofIsAndBranch(LTypeofIsAndBranch* instr) { |
| Register input = ToRegister(instr->value()); |
| 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()); |
| if (final_branch_condition != kNoCondition) { |
| 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_string())) { |
| __ 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_string())) { |
| __ 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()->symbol_string())) { |
| __ JumpIfSmi(input, false_label); |
| __ CompareObjectType(input, input, scratch, SYMBOL_TYPE); |
| final_branch_condition = eq; |
| |
| } else if (type_name->Equals(heap()->boolean_string())) { |
| __ CompareRoot(input, Heap::kTrueValueRootIndex); |
| __ b(eq, true_label); |
| __ CompareRoot(input, Heap::kFalseValueRootIndex); |
| final_branch_condition = eq; |
| |
| } else if (FLAG_harmony_typeof && type_name->Equals(heap()->null_string())) { |
| __ CompareRoot(input, Heap::kNullValueRootIndex); |
| final_branch_condition = eq; |
| |
| } else if (type_name->Equals(heap()->undefined_string())) { |
| __ 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_string())) { |
| STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2); |
| __ JumpIfSmi(input, false_label); |
| __ CompareObjectType(input, scratch, input, JS_FUNCTION_TYPE); |
| __ b(eq, true_label); |
| __ cmp(input, Operand(JS_FUNCTION_PROXY_TYPE)); |
| final_branch_condition = eq; |
| |
| } else if (type_name->Equals(heap()->object_string())) { |
| __ JumpIfSmi(input, false_label); |
| if (!FLAG_harmony_typeof) { |
| __ CompareRoot(input, Heap::kNullValueRootIndex); |
| __ b(eq, true_label); |
| } |
| __ CompareObjectType(input, input, scratch, |
| FIRST_NONCALLABLE_SPEC_OBJECT_TYPE); |
| __ b(lt, false_label); |
| __ CompareInstanceType(input, scratch, LAST_NONCALLABLE_SPEC_OBJECT_TYPE); |
| __ b(gt, false_label); |
| // Check for undetectable objects => false. |
| __ ldrb(ip, FieldMemOperand(input, Map::kBitFieldOffset)); |
| __ tst(ip, Operand(1 << Map::kIsUndetectable)); |
| final_branch_condition = eq; |
| |
| } else { |
| __ b(false_label); |
| } |
| |
| return final_branch_condition; |
| } |
| |
| |
| void LCodeGen::DoIsConstructCallAndBranch(LIsConstructCallAndBranch* instr) { |
| Register temp1 = ToRegister(instr->temp()); |
| 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::EnsureSpaceForLazyDeopt() { |
| if (info()->IsStub()) return; |
| // Ensure that we have enough space after the previous lazy-bailout |
| // instruction for patching the code here. |
| int current_pc = masm()->pc_offset(); |
| int patch_size = Deoptimizer::patch_size(); |
| if (current_pc < last_lazy_deopt_pc_ + patch_size) { |
| // Block literal pool emission for duration of padding. |
| Assembler::BlockConstPoolScope block_const_pool(masm()); |
| int padding_size = last_lazy_deopt_pc_ + patch_size - current_pc; |
| ASSERT_EQ(0, padding_size % Assembler::kInstrSize); |
| while (padding_size > 0) { |
| __ nop(); |
| padding_size -= Assembler::kInstrSize; |
| } |
| } |
| last_lazy_deopt_pc_ = masm()->pc_offset(); |
| } |
| |
| |
| void LCodeGen::DoLazyBailout(LLazyBailout* instr) { |
| EnsureSpaceForLazyDeopt(); |
| ASSERT(instr->HasEnvironment()); |
| LEnvironment* env = instr->environment(); |
| RegisterEnvironmentForDeoptimization(env, Safepoint::kLazyDeopt); |
| safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index()); |
| } |
| |
| |
| void LCodeGen::DoDeoptimize(LDeoptimize* instr) { |
| if (instr->hydrogen_value()->IsSoftDeoptimize()) { |
| SoftDeoptimize(instr->environment()); |
| } else { |
| DeoptimizeIf(al, instr->environment()); |
| } |
| } |
| |
| |
| void LCodeGen::DoDummyUse(LDummyUse* instr) { |
| // Nothing to see here, move on! |
| } |
| |
| |
| 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()); |
| LPointerMap* pointers = instr->pointer_map(); |
| RecordPosition(pointers->position()); |
| SafepointGenerator safepoint_generator( |
| this, pointers, Safepoint::kLazyDeopt); |
| __ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION, safepoint_generator); |
| } |
| |
| |
| void LCodeGen::DoIn(LIn* instr) { |
| Register obj = ToRegister(instr->object()); |
| Register key = ToRegister(instr->key()); |
| __ Push(key, obj); |
| ASSERT(instr->HasPointerMap()); |
| LPointerMap* pointers = instr->pointer_map(); |
| RecordPosition(pointers->position()); |
| SafepointGenerator safepoint_generator(this, pointers, Safepoint::kLazyDeopt); |
| __ InvokeBuiltin(Builtins::IN, CALL_FUNCTION, safepoint_generator); |
| } |
| |
| |
| void LCodeGen::DoDeferredStackCheck(LStackCheck* instr) { |
| PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters); |
| __ CallRuntimeSaveDoubles(Runtime::kStackGuard); |
| RecordSafepointWithLazyDeopt( |
| instr, RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS); |
| ASSERT(instr->HasEnvironment()); |
| LEnvironment* env = instr->environment(); |
| safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index()); |
| } |
| |
| |
| void LCodeGen::DoStackCheck(LStackCheck* instr) { |
| class DeferredStackCheck: public LDeferredCode { |
| public: |
| DeferredStackCheck(LCodeGen* codegen, LStackCheck* instr) |
| : LDeferredCode(codegen), instr_(instr) { } |
| virtual void Generate() { codegen()->DoDeferredStackCheck(instr_); } |
| virtual LInstruction* instr() { return instr_; } |
| private: |
| LStackCheck* instr_; |
| }; |
| |
| ASSERT(instr->HasEnvironment()); |
| LEnvironment* env = instr->environment(); |
| // There is no LLazyBailout instruction for stack-checks. We have to |
| // prepare for lazy deoptimization explicitly here. |
| if (instr->hydrogen()->is_function_entry()) { |
| // Perform stack overflow check. |
| Label done; |
| __ LoadRoot(ip, Heap::kStackLimitRootIndex); |
| __ cmp(sp, Operand(ip)); |
| __ b(hs, &done); |
| StackCheckStub stub; |
| PredictableCodeSizeScope predictable(masm_, 2 * Assembler::kInstrSize); |
| CallCode(stub.GetCode(isolate()), RelocInfo::CODE_TARGET, instr); |
| EnsureSpaceForLazyDeopt(); |
| __ bind(&done); |
| RegisterEnvironmentForDeoptimization(env, Safepoint::kLazyDeopt); |
| safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index()); |
| } else { |
| ASSERT(instr->hydrogen()->is_backwards_branch()); |
| // Perform stack overflow check if this goto needs it before jumping. |
| DeferredStackCheck* deferred_stack_check = |
| new(zone()) DeferredStackCheck(this, instr); |
| __ LoadRoot(ip, Heap::kStackLimitRootIndex); |
| __ cmp(sp, Operand(ip)); |
| __ b(lo, deferred_stack_check->entry()); |
| EnsureSpaceForLazyDeopt(); |
| __ bind(instr->done_label()); |
| deferred_stack_check->SetExit(instr->done_label()); |
| RegisterEnvironmentForDeoptimization(env, Safepoint::kLazyDeopt); |
| // Don't record a deoptimization index for the safepoint here. |
| // This will be done explicitly when emitting call and the safepoint in |
| // the deferred code. |
| } |
| } |
| |
| |
| void LCodeGen::DoOsrEntry(LOsrEntry* instr) { |
| // This is a pseudo-instruction that ensures that the environment here is |
| // properly registered for deoptimization and records the assembler's PC |
| // offset. |
| LEnvironment* environment = instr->environment(); |
| 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, Safepoint::kNoLazyDeopt); |
| ASSERT(osr_pc_offset_ == -1); |
| osr_pc_offset_ = masm()->pc_offset(); |
| } |
| |
| |
| void LCodeGen::DoForInPrepareMap(LForInPrepareMap* instr) { |
| __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| __ cmp(r0, ip); |
| DeoptimizeIf(eq, instr->environment()); |
| |
| Register null_value = r5; |
| __ LoadRoot(null_value, Heap::kNullValueRootIndex); |
| __ cmp(r0, null_value); |
| DeoptimizeIf(eq, instr->environment()); |
| |
| __ SmiTst(r0); |
| DeoptimizeIf(eq, instr->environment()); |
| |
| STATIC_ASSERT(FIRST_JS_PROXY_TYPE == FIRST_SPEC_OBJECT_TYPE); |
| __ CompareObjectType(r0, r1, r1, LAST_JS_PROXY_TYPE); |
| DeoptimizeIf(le, instr->environment()); |
| |
| Label use_cache, call_runtime; |
| __ CheckEnumCache(null_value, &call_runtime); |
| |
| __ ldr(r0, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| __ b(&use_cache); |
| |
| // Get the set of properties to enumerate. |
| __ bind(&call_runtime); |
| __ push(r0); |
| CallRuntime(Runtime::kGetPropertyNamesFast, 1, instr); |
| |
| __ ldr(r1, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| __ LoadRoot(ip, Heap::kMetaMapRootIndex); |
| __ cmp(r1, ip); |
| DeoptimizeIf(ne, instr->environment()); |
| __ bind(&use_cache); |
| } |
| |
| |
| void LCodeGen::DoForInCacheArray(LForInCacheArray* instr) { |
| Register map = ToRegister(instr->map()); |
| Register result = ToRegister(instr->result()); |
| Label load_cache, done; |
| __ EnumLength(result, map); |
| __ cmp(result, Operand(Smi::FromInt(0))); |
| __ b(ne, &load_cache); |
| __ mov(result, Operand(isolate()->factory()->empty_fixed_array())); |
| __ jmp(&done); |
| |
| __ bind(&load_cache); |
| __ LoadInstanceDescriptors(map, result); |
| __ ldr(result, |
| FieldMemOperand(result, DescriptorArray::kEnumCacheOffset)); |
| __ ldr(result, |
| FieldMemOperand(result, FixedArray::SizeFor(instr->idx()))); |
| __ cmp(result, Operand::Zero()); |
| DeoptimizeIf(eq, instr->environment()); |
| |
| __ bind(&done); |
| } |
| |
| |
| void LCodeGen::DoCheckMapValue(LCheckMapValue* instr) { |
| Register object = ToRegister(instr->value()); |
| Register map = ToRegister(instr->map()); |
| __ ldr(scratch0(), FieldMemOperand(object, HeapObject::kMapOffset)); |
| __ cmp(map, scratch0()); |
| DeoptimizeIf(ne, instr->environment()); |
| } |
| |
| |
| void LCodeGen::DoLoadFieldByIndex(LLoadFieldByIndex* instr) { |
| Register object = ToRegister(instr->object()); |
| Register index = ToRegister(instr->index()); |
| Register result = ToRegister(instr->result()); |
| Register scratch = scratch0(); |
| |
| Label out_of_object, done; |
| __ cmp(index, Operand::Zero()); |
| __ b(lt, &out_of_object); |
| |
| __ add(scratch, object, Operand::PointerOffsetFromSmiKey(index)); |
| __ ldr(result, FieldMemOperand(scratch, JSObject::kHeaderSize)); |
| |
| __ b(&done); |
| |
| __ bind(&out_of_object); |
| __ ldr(result, FieldMemOperand(object, JSObject::kPropertiesOffset)); |
| // Index is equal to negated out of object property index plus 1. |
| STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize < kPointerSizeLog2); |
| __ sub(scratch, result, Operand::PointerOffsetFromSmiKey(index)); |
| __ ldr(result, FieldMemOperand(scratch, |
| FixedArray::kHeaderSize - kPointerSize)); |
| __ bind(&done); |
| } |
| |
| |
| #undef __ |
| |
| } } // namespace v8::internal |