diff options
Diffstat (limited to 'deps/v8/src/mips/codegen-mips.cc')
| -rw-r--r-- | deps/v8/src/mips/codegen-mips.cc | 373 |
1 files changed, 10 insertions, 363 deletions
diff --git a/deps/v8/src/mips/codegen-mips.cc b/deps/v8/src/mips/codegen-mips.cc index 8aaeaca367..a57299abf6 100644 --- a/deps/v8/src/mips/codegen-mips.cc +++ b/deps/v8/src/mips/codegen-mips.cc @@ -605,351 +605,6 @@ 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 = t0; - 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. - __ sw(target_map, FieldMemOperand(receiver, HeapObject::kMapOffset)); - __ RecordWriteField(receiver, - HeapObject::kMapOffset, - target_map, - t5, - kRAHasNotBeenSaved, - 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 ra contains the return address. - Label loop, entry, convert_hole, gc_required, only_change_map, done; - Register elements = t0; - Register length = t1; - Register array = t2; - Register array_end = array; - - // target_map parameter can be clobbered. - Register scratch1 = target_map; - Register scratch2 = t5; - Register scratch3 = t3; - - // Verify input registers don't conflict with locals. - DCHECK(!AreAliased(receiver, key, value, target_map, - elements, length, array, scratch2)); - - Register scratch = t6; - - 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. - __ lw(elements, FieldMemOperand(receiver, JSObject::kElementsOffset)); - __ LoadRoot(at, Heap::kEmptyFixedArrayRootIndex); - __ Branch(&only_change_map, eq, at, Operand(elements)); - - __ push(ra); - __ lw(length, FieldMemOperand(elements, FixedArray::kLengthOffset)); - // elements: source FixedArray - // length: number of elements (smi-tagged) - - // Allocate new FixedDoubleArray. - __ sll(scratch, length, 2); - __ Addu(scratch, scratch, FixedDoubleArray::kHeaderSize); - __ Allocate(scratch, array, t3, scratch2, &gc_required, DOUBLE_ALIGNMENT); - // array: destination FixedDoubleArray, tagged as heap object - - // Set destination FixedDoubleArray's length and map. - __ LoadRoot(scratch2, Heap::kFixedDoubleArrayMapRootIndex); - __ sw(length, FieldMemOperand(array, FixedDoubleArray::kLengthOffset)); - // Update receiver's map. - __ sw(scratch2, FieldMemOperand(array, HeapObject::kMapOffset)); - - __ sw(target_map, FieldMemOperand(receiver, HeapObject::kMapOffset)); - __ RecordWriteField(receiver, - HeapObject::kMapOffset, - target_map, - scratch2, - kRAHasBeenSaved, - kDontSaveFPRegs, - OMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); - // Replace receiver's backing store with newly created FixedDoubleArray. - __ Addu(scratch1, array, Operand(kHeapObjectTag - kHeapObjectTag)); - __ sw(scratch1, FieldMemOperand(receiver, JSObject::kElementsOffset)); - __ RecordWriteField(receiver, - JSObject::kElementsOffset, - scratch1, - scratch2, - kRAHasBeenSaved, - kDontSaveFPRegs, - EMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); - - - // Prepare for conversion loop. - __ Addu(scratch1, elements, - Operand(FixedArray::kHeaderSize - kHeapObjectTag)); - __ Addu(scratch3, array, - Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag)); - __ Lsa(array_end, scratch3, length, 2); - - // Repurpose registers no longer in use. - Register hole_lower = elements; - Register hole_upper = length; - __ li(hole_lower, Operand(kHoleNanLower32)); - __ li(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 - // scratch3: begin of FixedDoubleArray element fields, not tagged - - __ Branch(&entry); - - __ bind(&only_change_map); - __ sw(target_map, FieldMemOperand(receiver, HeapObject::kMapOffset)); - __ RecordWriteField(receiver, - HeapObject::kMapOffset, - target_map, - scratch2, - kRAHasBeenSaved, - kDontSaveFPRegs, - OMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); - __ Branch(&done); - - // Call into runtime if GC is required. - __ bind(&gc_required); - __ lw(ra, MemOperand(sp, 0)); - __ Branch(USE_DELAY_SLOT, fail); - __ addiu(sp, sp, kPointerSize); // In delay slot. - - // Convert and copy elements. - __ bind(&loop); - __ lw(scratch2, MemOperand(scratch1)); - __ Addu(scratch1, scratch1, kIntSize); - // scratch2: current element - __ UntagAndJumpIfNotSmi(scratch2, scratch2, &convert_hole); - - // Normal smi, convert to double and store. - __ mtc1(scratch2, f0); - __ cvt_d_w(f0, f0); - __ sdc1(f0, MemOperand(scratch3)); - __ Branch(USE_DELAY_SLOT, &entry); - __ addiu(scratch3, scratch3, kDoubleSize); // In delay slot. - - // Hole found, store the-hole NaN. - __ bind(&convert_hole); - if (FLAG_debug_code) { - // Restore a "smi-untagged" heap object. - __ SmiTag(scratch2); - __ Or(scratch2, scratch2, Operand(1)); - __ LoadRoot(at, Heap::kTheHoleValueRootIndex); - __ Assert(eq, kObjectFoundInSmiOnlyArray, at, Operand(scratch2)); - } - // mantissa - __ sw(hole_lower, MemOperand(scratch3, Register::kMantissaOffset)); - // exponent - __ sw(hole_upper, MemOperand(scratch3, Register::kExponentOffset)); - __ addiu(scratch3, scratch3, kDoubleSize); - - __ bind(&entry); - __ Branch(&loop, lt, scratch3, Operand(array_end)); - - __ bind(&done); - __ pop(ra); -} - - -void ElementsTransitionGenerator::GenerateDoubleToObject( - MacroAssembler* masm, - Register receiver, - Register key, - Register value, - Register target_map, - AllocationSiteMode mode, - Label* fail) { - // Register ra contains the return address. - Label entry, loop, convert_hole, gc_required, only_change_map; - Register elements = t0; - Register array = t2; - Register length = t1; - Register scratch = t5; - - // 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. - __ lw(elements, FieldMemOperand(receiver, JSObject::kElementsOffset)); - __ LoadRoot(at, Heap::kEmptyFixedArrayRootIndex); - __ Branch(&only_change_map, eq, at, Operand(elements)); - - __ MultiPush( - value.bit() | key.bit() | receiver.bit() | target_map.bit() | ra.bit()); - - __ lw(length, FieldMemOperand(elements, FixedArray::kLengthOffset)); - // elements: source FixedArray - // 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; - __ sll(array_size, length, 1); - __ Addu(array_size, array_size, FixedDoubleArray::kHeaderSize); - __ Allocate(array_size, array, allocate_scratch, scratch, &gc_required, - NO_ALLOCATION_FLAGS); - // array: destination FixedArray, not tagged as heap object - // Set destination FixedDoubleArray's length and map. - __ LoadRoot(scratch, Heap::kFixedArrayMapRootIndex); - __ sw(length, FieldMemOperand(array, FixedDoubleArray::kLengthOffset)); - __ sw(scratch, FieldMemOperand(array, HeapObject::kMapOffset)); - - // Prepare for conversion loop. - Register src_elements = elements; - Register dst_elements = target_map; - Register dst_end = length; - Register heap_number_map = scratch; - __ Addu(src_elements, src_elements, Operand( - FixedDoubleArray::kHeaderSize - kHeapObjectTag - + Register::kExponentOffset)); - __ Addu(dst_elements, array, - Operand(FixedArray::kHeaderSize - kHeapObjectTag)); - __ Lsa(dst_end, dst_elements, dst_end, 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); - __ Branch(&initialization_loop_entry); - __ bind(&initialization_loop); - __ sw(scratch, MemOperand(dst_elements)); - __ Addu(dst_elements, dst_elements, Operand(kPointerSize)); - __ bind(&initialization_loop_entry); - __ Branch(&initialization_loop, lt, dst_elements, Operand(dst_end)); - - __ Addu(dst_elements, array, - Operand(FixedArray::kHeaderSize - kHeapObjectTag)); - __ LoadRoot(heap_number_map, Heap::kHeapNumberMapRootIndex); - // Using offsetted addresses. - // dst_elements: begin of destination FixedArray element fields, not tagged - // src_elements: begin of source FixedDoubleArray element fields, not tagged, - // points to the exponent - // dst_end: end of destination FixedArray, not tagged - // array: destination FixedArray - // heap_number_map: heap number map - __ Branch(&entry); - - // Call into runtime if GC is required. - __ bind(&gc_required); - __ MultiPop( - value.bit() | key.bit() | receiver.bit() | target_map.bit() | ra.bit()); - - __ Branch(fail); - - __ bind(&loop); - Register upper_bits = key; - __ lw(upper_bits, MemOperand(src_elements)); - __ Addu(src_elements, src_elements, kDoubleSize); - // upper_bits: current element's upper 32 bit - // src_elements: address of next element's upper 32 bit - __ Branch(&convert_hole, eq, a1, Operand(kHoleNanUpper32)); - - // Non-hole double, copy value into a heap number. - Register heap_number = receiver; - Register scratch2 = value; - Register scratch3 = t6; - __ AllocateHeapNumber(heap_number, scratch2, scratch3, heap_number_map, - &gc_required); - // heap_number: new heap number - // Load mantissa of current element, src_elements - // point to exponent of next element. - __ lw(scratch2, MemOperand(src_elements, (Register::kMantissaOffset - - Register::kExponentOffset - kDoubleSize))); - __ sw(scratch2, FieldMemOperand(heap_number, HeapNumber::kMantissaOffset)); - __ sw(upper_bits, FieldMemOperand(heap_number, HeapNumber::kExponentOffset)); - __ mov(scratch2, dst_elements); - __ sw(heap_number, MemOperand(dst_elements)); - __ Addu(dst_elements, dst_elements, kIntSize); - __ RecordWrite(array, - scratch2, - heap_number, - kRAHasBeenSaved, - kDontSaveFPRegs, - EMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); - __ Branch(&entry); - - // Replace the-hole NaN with the-hole pointer. - __ bind(&convert_hole); - __ LoadRoot(scratch2, Heap::kTheHoleValueRootIndex); - __ sw(scratch2, MemOperand(dst_elements)); - __ Addu(dst_elements, dst_elements, kIntSize); - - __ bind(&entry); - __ Branch(&loop, lt, dst_elements, Operand(dst_end)); - - __ MultiPop(receiver.bit() | target_map.bit() | value.bit() | key.bit()); - // Replace receiver's backing store with newly created and filled FixedArray. - __ sw(array, FieldMemOperand(receiver, JSObject::kElementsOffset)); - __ RecordWriteField(receiver, - JSObject::kElementsOffset, - array, - scratch, - kRAHasBeenSaved, - kDontSaveFPRegs, - EMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); - __ pop(ra); - - __ bind(&only_change_map); - // Update receiver's map. - __ sw(target_map, FieldMemOperand(receiver, HeapObject::kMapOffset)); - __ RecordWriteField(receiver, - HeapObject::kMapOffset, - target_map, - scratch, - kRAHasNotBeenSaved, - kDontSaveFPRegs, - OMIT_REMEMBERED_SET, - OMIT_SMI_CHECK); -} - - void StringCharLoadGenerator::Generate(MacroAssembler* masm, Register string, Register index, @@ -1076,37 +731,29 @@ 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 = Assembler::target_address_at( - sequence + Assembler::kInstrSize); - Code* stub = GetCodeFromTargetAddress(target_address); - GetCodeAgeAndParity(stub, age, parity); - } + Address target_address = + Assembler::target_address_at(sequence + 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); // Mark this code sequence for FindPlatformCodeAgeSequence(). patcher.masm()->nop(Assembler::CODE_AGE_MARKER_NOP); // Load the stub address to t9 and call it, - // GetCodeAgeAndParity() extracts the stub address from this instruction. + // GetCodeAge() extracts the stub address from this instruction. patcher.masm()->li( t9, Operand(reinterpret_cast<uint32_t>(stub->instruction_start())), |