diff options
Diffstat (limited to 'deps/v8/src/arm/codegen-arm.cc')
| -rw-r--r-- | deps/v8/src/arm/codegen-arm.cc | 358 |
1 files changed, 9 insertions, 349 deletions
diff --git a/deps/v8/src/arm/codegen-arm.cc b/deps/v8/src/arm/codegen-arm.cc index e63da5c766..06e92168b6 100644 --- a/deps/v8/src/arm/codegen-arm.cc +++ b/deps/v8/src/arm/codegen-arm.cc @@ -317,337 +317,6 @@ void StubRuntimeCallHelper::AfterCall(MacroAssembler* masm) const { #define __ ACCESS_MASM(masm) -void ElementsTransitionGenerator::GenerateMapChangeElementsTransition( - MacroAssembler* masm, - Register receiver, - Register key, - Register value, - Register target_map, - AllocationSiteMode mode, - Label* allocation_memento_found) { - Register scratch_elements = r4; - DCHECK(!AreAliased(receiver, key, value, target_map, - scratch_elements)); - - if (mode == TRACK_ALLOCATION_SITE) { - DCHECK(allocation_memento_found != NULL); - __ JumpIfJSArrayHasAllocationMemento( - receiver, scratch_elements, allocation_memento_found); - } - - // Set transitioned map. - __ str(target_map, FieldMemOperand(receiver, HeapObject::kMapOffset)); - __ RecordWriteField(receiver, - HeapObject::kMapOffset, - target_map, - r9, - kLRHasNotBeenSaved, - 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) { - // Register lr contains the return address. - Label loop, entry, convert_hole, gc_required, only_change_map, done; - Register elements = r4; - Register length = r5; - Register array = r6; - Register array_end = array; - - // target_map parameter can be clobbered. - Register scratch1 = target_map; - Register scratch2 = r9; - - // Verify input registers don't conflict with locals. - DCHECK(!AreAliased(receiver, key, value, target_map, - elements, length, array, scratch2)); - - if (mode == TRACK_ALLOCATION_SITE) { - __ JumpIfJSArrayHasAllocationMemento(receiver, elements, fail); - } - - // Check for empty arrays, which only require a map transition and no changes - // to the backing store. - __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset)); - __ CompareRoot(elements, Heap::kEmptyFixedArrayRootIndex); - __ b(eq, &only_change_map); - - __ push(lr); - __ ldr(length, FieldMemOperand(elements, FixedArray::kLengthOffset)); - // length: number of elements (smi-tagged) - - // Allocate new FixedDoubleArray. - // Use lr as a temporary register. - __ mov(lr, Operand(length, LSL, 2)); - __ add(lr, lr, Operand(FixedDoubleArray::kHeaderSize)); - __ Allocate(lr, array, elements, scratch2, &gc_required, DOUBLE_ALIGNMENT); - __ sub(array, array, Operand(kHeapObjectTag)); - // array: destination FixedDoubleArray, not tagged as heap object. - __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset)); - // r4: source FixedArray. - - // Set destination FixedDoubleArray's length and map. - __ LoadRoot(scratch2, Heap::kFixedDoubleArrayMapRootIndex); - __ str(length, MemOperand(array, FixedDoubleArray::kLengthOffset)); - // Update receiver's map. - __ str(scratch2, MemOperand(array, HeapObject::kMapOffset)); - - __ str(target_map, FieldMemOperand(receiver, HeapObject::kMapOffset)); - __ RecordWriteField(receiver, - HeapObject::kMapOffset, - target_map, - scratch2, - kLRHasBeenSaved, - kDontSaveFPRegs, - OMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); - // Replace receiver's backing store with newly created FixedDoubleArray. - __ add(scratch1, array, Operand(kHeapObjectTag)); - __ str(scratch1, FieldMemOperand(receiver, JSObject::kElementsOffset)); - __ RecordWriteField(receiver, - JSObject::kElementsOffset, - scratch1, - scratch2, - kLRHasBeenSaved, - kDontSaveFPRegs, - EMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); - - // Prepare for conversion loop. - __ add(scratch1, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); - __ add(scratch2, array, Operand(FixedDoubleArray::kHeaderSize)); - __ add(array_end, scratch2, Operand(length, LSL, 2)); - - // Repurpose registers no longer in use. - Register hole_lower = elements; - Register hole_upper = length; - - __ mov(hole_lower, Operand(kHoleNanLower32)); - __ mov(hole_upper, Operand(kHoleNanUpper32)); - // scratch1: begin of source FixedArray element fields, not tagged - // hole_lower: kHoleNanLower32 - // hole_upper: kHoleNanUpper32 - // array_end: end of destination FixedDoubleArray, not tagged - // scratch2: begin of FixedDoubleArray element fields, not tagged - - __ b(&entry); - - __ bind(&only_change_map); - __ str(target_map, FieldMemOperand(receiver, HeapObject::kMapOffset)); - __ RecordWriteField(receiver, - HeapObject::kMapOffset, - target_map, - scratch2, - kLRHasNotBeenSaved, - kDontSaveFPRegs, - OMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); - __ b(&done); - - // Call into runtime if GC is required. - __ bind(&gc_required); - __ pop(lr); - __ b(fail); - - // Convert and copy elements. - __ bind(&loop); - __ ldr(lr, MemOperand(scratch1, 4, PostIndex)); - // lr: current element - __ UntagAndJumpIfNotSmi(lr, lr, &convert_hole); - - // Normal smi, convert to double and store. - __ vmov(s0, lr); - __ vcvt_f64_s32(d0, s0); - __ vstr(d0, scratch2, 0); - __ add(scratch2, scratch2, Operand(8)); - __ b(&entry); - - // Hole found, store the-hole NaN. - __ bind(&convert_hole); - if (FLAG_debug_code) { - // Restore a "smi-untagged" heap object. - __ SmiTag(lr); - __ orr(lr, lr, Operand(1)); - __ CompareRoot(lr, Heap::kTheHoleValueRootIndex); - __ Assert(eq, kObjectFoundInSmiOnlyArray); - } - __ Strd(hole_lower, hole_upper, MemOperand(scratch2, 8, PostIndex)); - - __ bind(&entry); - __ cmp(scratch2, array_end); - __ b(lt, &loop); - - __ pop(lr); - __ bind(&done); -} - - -void ElementsTransitionGenerator::GenerateDoubleToObject( - MacroAssembler* masm, - Register receiver, - Register key, - Register value, - Register target_map, - AllocationSiteMode mode, - Label* fail) { - // Register lr contains the return address. - Label entry, loop, convert_hole, gc_required, only_change_map; - Register elements = r4; - Register array = r6; - Register length = r5; - Register scratch = r9; - - // Verify input registers don't conflict with locals. - DCHECK(!AreAliased(receiver, key, value, target_map, - elements, array, length, scratch)); - - if (mode == TRACK_ALLOCATION_SITE) { - __ JumpIfJSArrayHasAllocationMemento(receiver, elements, fail); - } - - // Check for empty arrays, which only require a map transition and no changes - // to the backing store. - __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset)); - __ CompareRoot(elements, Heap::kEmptyFixedArrayRootIndex); - __ b(eq, &only_change_map); - - __ push(lr); - __ Push(target_map, receiver, key, value); - __ ldr(length, FieldMemOperand(elements, FixedArray::kLengthOffset)); - // elements: source FixedDoubleArray - // length: number of elements (smi-tagged) - - // Allocate new FixedArray. - // Re-use value and target_map registers, as they have been saved on the - // stack. - Register array_size = value; - Register allocate_scratch = target_map; - __ mov(array_size, Operand(FixedDoubleArray::kHeaderSize)); - __ add(array_size, array_size, Operand(length, LSL, 1)); - __ Allocate(array_size, array, allocate_scratch, scratch, &gc_required, - NO_ALLOCATION_FLAGS); - // array: destination FixedArray, tagged as heap object - // Set destination FixedDoubleArray's length and map. - __ LoadRoot(scratch, Heap::kFixedArrayMapRootIndex); - __ str(length, FieldMemOperand(array, FixedDoubleArray::kLengthOffset)); - __ str(scratch, FieldMemOperand(array, HeapObject::kMapOffset)); - - __ sub(array, array, Operand(kHeapObjectTag)); - - // Prepare for conversion loop. - Register src_elements = elements; - Register dst_elements = target_map; - Register dst_end = length; - Register heap_number_map = scratch; - __ add(src_elements, elements, - Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag + 4)); - __ add(dst_elements, array, Operand(FixedArray::kHeaderSize)); - __ add(dst_end, dst_elements, Operand(length, LSL, 1)); - - // 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; - __ LoadRoot(scratch, Heap::kTheHoleValueRootIndex); - __ b(&initialization_loop_entry); - __ bind(&initialization_loop); - __ str(scratch, MemOperand(dst_elements, kPointerSize, PostIndex)); - __ bind(&initialization_loop_entry); - __ cmp(dst_elements, dst_end); - __ b(lt, &initialization_loop); - - __ add(dst_elements, array, Operand(FixedArray::kHeaderSize)); - __ add(array, array, Operand(kHeapObjectTag)); - __ LoadRoot(heap_number_map, Heap::kHeapNumberMapRootIndex); - // Using offsetted addresses in src_elements to fully take advantage of - // post-indexing. - // dst_elements: begin of destination FixedArray element fields, not tagged - // src_elements: begin of source FixedDoubleArray element fields, - // not tagged, +4 - // dst_end: end of destination FixedArray, not tagged - // array: destination FixedArray - // heap_number_map: heap number map - __ b(&entry); - - // Call into runtime if GC is required. - __ bind(&gc_required); - __ Pop(target_map, receiver, key, value); - __ pop(lr); - __ b(fail); - - __ bind(&loop); - Register upper_bits = key; - __ ldr(upper_bits, MemOperand(src_elements, 8, PostIndex)); - // upper_bits: current element's upper 32 bit - // src_elements: address of next element's upper 32 bit - __ cmp(upper_bits, Operand(kHoleNanUpper32)); - __ b(eq, &convert_hole); - - // Non-hole double, copy value into a heap number. - Register heap_number = receiver; - Register scratch2 = value; - __ AllocateHeapNumber(heap_number, scratch2, lr, heap_number_map, - &gc_required); - // heap_number: new heap number - __ ldr(scratch2, MemOperand(src_elements, 12, NegOffset)); - __ Strd(scratch2, upper_bits, - FieldMemOperand(heap_number, HeapNumber::kValueOffset)); - __ mov(scratch2, dst_elements); - __ str(heap_number, MemOperand(dst_elements, 4, PostIndex)); - __ RecordWrite(array, - scratch2, - heap_number, - kLRHasBeenSaved, - kDontSaveFPRegs, - EMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); - __ b(&entry); - - // Replace the-hole NaN with the-hole pointer. - __ bind(&convert_hole); - __ LoadRoot(scratch2, Heap::kTheHoleValueRootIndex); - __ str(scratch2, MemOperand(dst_elements, 4, PostIndex)); - - __ bind(&entry); - __ cmp(dst_elements, dst_end); - __ b(lt, &loop); - - __ Pop(target_map, receiver, key, value); - // Replace receiver's backing store with newly created and filled FixedArray. - __ str(array, FieldMemOperand(receiver, JSObject::kElementsOffset)); - __ RecordWriteField(receiver, - JSObject::kElementsOffset, - array, - scratch, - kLRHasBeenSaved, - kDontSaveFPRegs, - EMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); - __ pop(lr); - - __ bind(&only_change_map); - // Update receiver's map. - __ str(target_map, FieldMemOperand(receiver, HeapObject::kMapOffset)); - __ RecordWriteField(receiver, - HeapObject::kMapOffset, - target_map, - scratch, - kLRHasNotBeenSaved, - kDontSaveFPRegs, - OMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); -} - - void StringCharLoadGenerator::Generate(MacroAssembler* masm, Register string, Register index, @@ -771,31 +440,23 @@ 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 { - Address target_address = Memory::Address_at( - sequence + (kNoCodeAgeSequenceLength - Assembler::kInstrSize)); - Code* stub = GetCodeFromTargetAddress(target_address); - GetCodeAgeAndParity(stub, age, parity); - } + Address target_address = Memory::Address_at( + sequence + (kNoCodeAgeSequenceLength - Assembler::kInstrSize)); + 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 / Assembler::kInstrSize); patcher.masm()->add(r0, pc, Operand(-8)); @@ -804,7 +465,6 @@ void Code::PatchPlatformCodeAge(Isolate* isolate, } } - } // namespace internal } // namespace v8 |