diff options
Diffstat (limited to 'deps/v8/src/x64/codegen-x64.cc')
| -rw-r--r-- | deps/v8/src/x64/codegen-x64.cc | 331 |
1 files changed, 10 insertions, 321 deletions
diff --git a/deps/v8/src/x64/codegen-x64.cc b/deps/v8/src/x64/codegen-x64.cc index 911f3cb64a..2432d7ed4f 100644 --- a/deps/v8/src/x64/codegen-x64.cc +++ b/deps/v8/src/x64/codegen-x64.cc @@ -62,309 +62,6 @@ UnaryMathFunctionWithIsolate CreateSqrtFunction(Isolate* isolate) { #define __ ACCESS_MASM(masm) -void ElementsTransitionGenerator::GenerateMapChangeElementsTransition( - MacroAssembler* masm, - Register receiver, - Register key, - Register value, - Register target_map, - AllocationSiteMode mode, - Label* allocation_memento_found) { - // Return address is on the stack. - Register scratch = rdi; - DCHECK(!AreAliased(receiver, key, value, target_map, scratch)); - - if (mode == TRACK_ALLOCATION_SITE) { - DCHECK(allocation_memento_found != NULL); - __ JumpIfJSArrayHasAllocationMemento( - receiver, scratch, allocation_memento_found); - } - - // Set transitioned map. - __ movp(FieldOperand(receiver, HeapObject::kMapOffset), target_map); - __ RecordWriteField(receiver, - HeapObject::kMapOffset, - target_map, - scratch, - kDontSaveFPRegs, - EMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); -} - - -void ElementsTransitionGenerator::GenerateSmiToDouble( - MacroAssembler* masm, - Register receiver, - Register key, - Register value, - Register target_map, - AllocationSiteMode mode, - Label* fail) { - // Return address is on the stack. - DCHECK(receiver.is(rdx)); - DCHECK(key.is(rcx)); - DCHECK(value.is(rax)); - DCHECK(target_map.is(rbx)); - - // The fail label is not actually used since we do not allocate. - Label allocated, new_backing_store, only_change_map, done; - - if (mode == TRACK_ALLOCATION_SITE) { - __ JumpIfJSArrayHasAllocationMemento(rdx, rdi, fail); - } - - // Check for empty arrays, which only require a map transition and no changes - // to the backing store. - __ movp(r8, FieldOperand(rdx, JSObject::kElementsOffset)); - __ CompareRoot(r8, Heap::kEmptyFixedArrayRootIndex); - __ j(equal, &only_change_map); - - __ SmiToInteger32(r9, FieldOperand(r8, FixedDoubleArray::kLengthOffset)); - if (kPointerSize == kDoubleSize) { - // Check backing store for COW-ness. For COW arrays we have to - // allocate a new backing store. - __ CompareRoot(FieldOperand(r8, HeapObject::kMapOffset), - Heap::kFixedCOWArrayMapRootIndex); - __ j(equal, &new_backing_store); - } else { - // For x32 port we have to allocate a new backing store as SMI size is - // not equal with double size. - DCHECK(kDoubleSize == 2 * kPointerSize); - __ jmp(&new_backing_store); - } - - // Check if the backing store is in new-space. If not, we need to allocate - // a new one since the old one is in pointer-space. - // If in new space, we can reuse the old backing store because it is - // the same size. - __ JumpIfNotInNewSpace(r8, rdi, &new_backing_store); - - __ movp(r14, r8); // Destination array equals source array. - - // r8 : source FixedArray - // r9 : elements array length - // r14: destination FixedDoubleArray - // Set backing store's map - __ LoadRoot(rdi, Heap::kFixedDoubleArrayMapRootIndex); - __ movp(FieldOperand(r14, HeapObject::kMapOffset), rdi); - - __ bind(&allocated); - // Set transitioned map. - __ movp(FieldOperand(rdx, HeapObject::kMapOffset), rbx); - __ RecordWriteField(rdx, - HeapObject::kMapOffset, - rbx, - rdi, - kDontSaveFPRegs, - EMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); - - // Convert smis to doubles and holes to hole NaNs. The Array's length - // remains unchanged. - STATIC_ASSERT(FixedDoubleArray::kLengthOffset == FixedArray::kLengthOffset); - STATIC_ASSERT(FixedDoubleArray::kHeaderSize == FixedArray::kHeaderSize); - - Label loop, entry, convert_hole; - __ movq(r15, bit_cast<int64_t, uint64_t>(kHoleNanInt64)); - // r15: the-hole NaN - __ jmp(&entry); - - // Allocate new backing store. - __ bind(&new_backing_store); - __ leap(rdi, Operand(r9, times_8, FixedArray::kHeaderSize)); - __ Allocate(rdi, r14, r11, r15, fail, NO_ALLOCATION_FLAGS); - // Set backing store's map - __ LoadRoot(rdi, Heap::kFixedDoubleArrayMapRootIndex); - __ movp(FieldOperand(r14, HeapObject::kMapOffset), rdi); - // Set receiver's backing store. - __ movp(FieldOperand(rdx, JSObject::kElementsOffset), r14); - __ movp(r11, r14); - __ RecordWriteField(rdx, - JSObject::kElementsOffset, - r11, - r15, - kDontSaveFPRegs, - EMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); - // Set backing store's length. - __ Integer32ToSmi(r11, r9); - __ movp(FieldOperand(r14, FixedDoubleArray::kLengthOffset), r11); - __ jmp(&allocated); - - __ bind(&only_change_map); - // Set transitioned map. - __ movp(FieldOperand(rdx, HeapObject::kMapOffset), rbx); - __ RecordWriteField(rdx, - HeapObject::kMapOffset, - rbx, - rdi, - kDontSaveFPRegs, - OMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); - __ jmp(&done); - - // Conversion loop. - __ bind(&loop); - __ movp(rbx, - FieldOperand(r8, r9, times_pointer_size, FixedArray::kHeaderSize)); - // r9 : current element's index - // rbx: current element (smi-tagged) - __ JumpIfNotSmi(rbx, &convert_hole); - __ SmiToInteger32(rbx, rbx); - __ Cvtlsi2sd(kScratchDoubleReg, rbx); - __ Movsd(FieldOperand(r14, r9, times_8, FixedDoubleArray::kHeaderSize), - kScratchDoubleReg); - __ jmp(&entry); - __ bind(&convert_hole); - - if (FLAG_debug_code) { - __ CompareRoot(rbx, Heap::kTheHoleValueRootIndex); - __ Assert(equal, kObjectFoundInSmiOnlyArray); - } - - __ movq(FieldOperand(r14, r9, times_8, FixedDoubleArray::kHeaderSize), r15); - __ bind(&entry); - __ decp(r9); - __ j(not_sign, &loop); - - __ bind(&done); -} - - -void ElementsTransitionGenerator::GenerateDoubleToObject( - MacroAssembler* masm, - Register receiver, - Register key, - Register value, - Register target_map, - AllocationSiteMode mode, - Label* fail) { - // Return address is on the stack. - DCHECK(receiver.is(rdx)); - DCHECK(key.is(rcx)); - DCHECK(value.is(rax)); - DCHECK(target_map.is(rbx)); - - Label loop, entry, convert_hole, gc_required, only_change_map; - - if (mode == TRACK_ALLOCATION_SITE) { - __ JumpIfJSArrayHasAllocationMemento(rdx, rdi, fail); - } - - // Check for empty arrays, which only require a map transition and no changes - // to the backing store. - __ movp(r8, FieldOperand(rdx, JSObject::kElementsOffset)); - __ CompareRoot(r8, Heap::kEmptyFixedArrayRootIndex); - __ j(equal, &only_change_map); - - __ Push(rsi); - __ Push(rax); - - __ movp(r8, FieldOperand(rdx, JSObject::kElementsOffset)); - __ SmiToInteger32(r9, FieldOperand(r8, FixedDoubleArray::kLengthOffset)); - // r8 : source FixedDoubleArray - // r9 : number of elements - __ leap(rdi, Operand(r9, times_pointer_size, FixedArray::kHeaderSize)); - __ Allocate(rdi, r11, r14, r15, &gc_required, NO_ALLOCATION_FLAGS); - // r11: destination FixedArray - __ LoadRoot(rdi, Heap::kFixedArrayMapRootIndex); - __ movp(FieldOperand(r11, HeapObject::kMapOffset), rdi); - __ Integer32ToSmi(r14, r9); - __ movp(FieldOperand(r11, FixedArray::kLengthOffset), r14); - - // Prepare for conversion loop. - __ movq(rsi, bit_cast<int64_t, uint64_t>(kHoleNanInt64)); - __ LoadRoot(rdi, Heap::kTheHoleValueRootIndex); - // rsi: the-hole NaN - // rdi: pointer to the-hole - - // Allocating heap numbers in the loop below can fail and cause a jump to - // gc_required. We can't leave a partly initialized FixedArray behind, - // so pessimistically fill it with holes now. - Label initialization_loop, initialization_loop_entry; - __ jmp(&initialization_loop_entry, Label::kNear); - __ bind(&initialization_loop); - __ movp(FieldOperand(r11, r9, times_pointer_size, FixedArray::kHeaderSize), - rdi); - __ bind(&initialization_loop_entry); - __ decp(r9); - __ j(not_sign, &initialization_loop); - - __ SmiToInteger32(r9, FieldOperand(r8, FixedDoubleArray::kLengthOffset)); - __ jmp(&entry); - - // Call into runtime if GC is required. - __ bind(&gc_required); - __ Pop(rax); - __ Pop(rsi); - __ jmp(fail); - - // Box doubles into heap numbers. - __ bind(&loop); - __ movq(r14, FieldOperand(r8, - r9, - times_8, - FixedDoubleArray::kHeaderSize)); - // r9 : current element's index - // r14: current element - __ cmpq(r14, rsi); - __ j(equal, &convert_hole); - - // Non-hole double, copy value into a heap number. - __ AllocateHeapNumber(rax, r15, &gc_required); - // rax: new heap number - __ movq(FieldOperand(rax, HeapNumber::kValueOffset), r14); - __ movp(FieldOperand(r11, - r9, - times_pointer_size, - FixedArray::kHeaderSize), - rax); - __ movp(r15, r9); - __ RecordWriteArray(r11, - rax, - r15, - kDontSaveFPRegs, - EMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); - __ jmp(&entry, Label::kNear); - - // Replace the-hole NaN with the-hole pointer. - __ bind(&convert_hole); - __ movp(FieldOperand(r11, - r9, - times_pointer_size, - FixedArray::kHeaderSize), - rdi); - - __ bind(&entry); - __ decp(r9); - __ j(not_sign, &loop); - - // Replace receiver's backing store with newly created and filled FixedArray. - __ movp(FieldOperand(rdx, JSObject::kElementsOffset), r11); - __ RecordWriteField(rdx, - JSObject::kElementsOffset, - r11, - r15, - kDontSaveFPRegs, - EMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); - __ Pop(rax); - __ Pop(rsi); - - __ bind(&only_change_map); - // Set transitioned map. - __ movp(FieldOperand(rdx, HeapObject::kMapOffset), rbx); - __ RecordWriteField(rdx, - HeapObject::kMapOffset, - rbx, - rdi, - kDontSaveFPRegs, - OMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); -} - - void StringCharLoadGenerator::Generate(MacroAssembler* masm, Register string, Register index, @@ -498,32 +195,24 @@ bool Code::IsYoungSequence(Isolate* isolate, byte* sequence) { return result; } +Code::Age Code::GetCodeAge(Isolate* isolate, byte* sequence) { + if (IsYoungSequence(isolate, sequence)) return kNoAgeCodeAge; -void Code::GetCodeAgeAndParity(Isolate* isolate, byte* sequence, Age* age, - MarkingParity* parity) { - if (IsYoungSequence(isolate, sequence)) { - *age = kNoAgeCodeAge; - *parity = NO_MARKING_PARITY; - } else { - sequence++; // Skip the kCallOpcode byte - Address target_address = sequence + *reinterpret_cast<int*>(sequence) + - Assembler::kCallTargetAddressOffset; - Code* stub = GetCodeFromTargetAddress(target_address); - GetCodeAgeAndParity(stub, age, parity); - } + sequence++; // Skip the kCallOpcode byte + Address target_address = sequence + *reinterpret_cast<int*>(sequence) + + Assembler::kCallTargetAddressOffset; + Code* stub = GetCodeFromTargetAddress(target_address); + return GetAgeOfCodeAgeStub(stub); } - -void Code::PatchPlatformCodeAge(Isolate* isolate, - byte* sequence, - Code::Age age, - MarkingParity parity) { +void Code::PatchPlatformCodeAge(Isolate* isolate, byte* sequence, + Code::Age age) { uint32_t young_length = isolate->code_aging_helper()->young_sequence_length(); if (age == kNoAgeCodeAge) { isolate->code_aging_helper()->CopyYoungSequenceTo(sequence); Assembler::FlushICache(isolate, sequence, young_length); } else { - Code* stub = GetCodeAgeStub(isolate, age, parity); + Code* stub = GetCodeAgeStub(isolate, age); CodePatcher patcher(isolate, sequence, young_length); patcher.masm()->call(stub->instruction_start()); patcher.masm()->Nop( |