| // Copyright 2014 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <assert.h> // For assert |
| #include <limits.h> // For LONG_MIN, LONG_MAX. |
| |
| #include "src/v8.h" |
| |
| #if V8_TARGET_ARCH_PPC |
| |
| #include "src/base/bits.h" |
| #include "src/base/division-by-constant.h" |
| #include "src/bootstrapper.h" |
| #include "src/codegen.h" |
| #include "src/cpu-profiler.h" |
| #include "src/debug.h" |
| #include "src/isolate-inl.h" |
| #include "src/runtime/runtime.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| MacroAssembler::MacroAssembler(Isolate* arg_isolate, void* buffer, int size) |
| : Assembler(arg_isolate, buffer, size), |
| generating_stub_(false), |
| has_frame_(false) { |
| if (isolate() != NULL) { |
| code_object_ = |
| Handle<Object>(isolate()->heap()->undefined_value(), isolate()); |
| } |
| } |
| |
| |
| void MacroAssembler::Jump(Register target) { |
| mtctr(target); |
| bctr(); |
| } |
| |
| |
| void MacroAssembler::JumpToJSEntry(Register target) { |
| Move(ip, target); |
| Jump(ip); |
| } |
| |
| |
| void MacroAssembler::Jump(intptr_t target, RelocInfo::Mode rmode, |
| Condition cond, CRegister cr) { |
| Label skip; |
| |
| if (cond != al) b(NegateCondition(cond), &skip, cr); |
| |
| DCHECK(rmode == RelocInfo::CODE_TARGET || rmode == RelocInfo::RUNTIME_ENTRY); |
| |
| mov(ip, Operand(target, rmode)); |
| mtctr(ip); |
| bctr(); |
| |
| bind(&skip); |
| } |
| |
| |
| void MacroAssembler::Jump(Address target, RelocInfo::Mode rmode, Condition cond, |
| CRegister cr) { |
| DCHECK(!RelocInfo::IsCodeTarget(rmode)); |
| Jump(reinterpret_cast<intptr_t>(target), rmode, cond, cr); |
| } |
| |
| |
| void MacroAssembler::Jump(Handle<Code> code, RelocInfo::Mode rmode, |
| Condition cond) { |
| DCHECK(RelocInfo::IsCodeTarget(rmode)); |
| // 'code' is always generated ppc code, never THUMB code |
| AllowDeferredHandleDereference embedding_raw_address; |
| Jump(reinterpret_cast<intptr_t>(code.location()), rmode, cond); |
| } |
| |
| |
| int MacroAssembler::CallSize(Register target) { return 2 * kInstrSize; } |
| |
| |
| void MacroAssembler::Call(Register target) { |
| BlockTrampolinePoolScope block_trampoline_pool(this); |
| Label start; |
| bind(&start); |
| |
| // Statement positions are expected to be recorded when the target |
| // address is loaded. |
| positions_recorder()->WriteRecordedPositions(); |
| |
| // branch via link register and set LK bit for return point |
| mtctr(target); |
| bctrl(); |
| |
| DCHECK_EQ(CallSize(target), SizeOfCodeGeneratedSince(&start)); |
| } |
| |
| |
| void MacroAssembler::CallJSEntry(Register target) { |
| DCHECK(target.is(ip)); |
| Call(target); |
| } |
| |
| |
| int MacroAssembler::CallSize(Address target, RelocInfo::Mode rmode, |
| Condition cond) { |
| Operand mov_operand = Operand(reinterpret_cast<intptr_t>(target), rmode); |
| return (2 + instructions_required_for_mov(mov_operand)) * kInstrSize; |
| } |
| |
| |
| int MacroAssembler::CallSizeNotPredictableCodeSize(Address target, |
| RelocInfo::Mode rmode, |
| Condition cond) { |
| return (2 + kMovInstructionsNoConstantPool) * kInstrSize; |
| } |
| |
| |
| void MacroAssembler::Call(Address target, RelocInfo::Mode rmode, |
| Condition cond) { |
| BlockTrampolinePoolScope block_trampoline_pool(this); |
| DCHECK(cond == al); |
| |
| #ifdef DEBUG |
| // Check the expected size before generating code to ensure we assume the same |
| // constant pool availability (e.g., whether constant pool is full or not). |
| int expected_size = CallSize(target, rmode, cond); |
| Label start; |
| bind(&start); |
| #endif |
| |
| // Statement positions are expected to be recorded when the target |
| // address is loaded. |
| positions_recorder()->WriteRecordedPositions(); |
| |
| // This can likely be optimized to make use of bc() with 24bit relative |
| // |
| // RecordRelocInfo(x.rmode_, x.imm_); |
| // bc( BA, .... offset, LKset); |
| // |
| |
| mov(ip, Operand(reinterpret_cast<intptr_t>(target), rmode)); |
| mtctr(ip); |
| bctrl(); |
| |
| DCHECK_EQ(expected_size, SizeOfCodeGeneratedSince(&start)); |
| } |
| |
| |
| int MacroAssembler::CallSize(Handle<Code> code, RelocInfo::Mode rmode, |
| TypeFeedbackId ast_id, Condition cond) { |
| AllowDeferredHandleDereference using_raw_address; |
| return CallSize(reinterpret_cast<Address>(code.location()), rmode, cond); |
| } |
| |
| |
| void MacroAssembler::Call(Handle<Code> code, RelocInfo::Mode rmode, |
| TypeFeedbackId ast_id, Condition cond) { |
| BlockTrampolinePoolScope block_trampoline_pool(this); |
| DCHECK(RelocInfo::IsCodeTarget(rmode)); |
| |
| #ifdef DEBUG |
| // Check the expected size before generating code to ensure we assume the same |
| // constant pool availability (e.g., whether constant pool is full or not). |
| int expected_size = CallSize(code, rmode, ast_id, cond); |
| Label start; |
| bind(&start); |
| #endif |
| |
| if (rmode == RelocInfo::CODE_TARGET && !ast_id.IsNone()) { |
| SetRecordedAstId(ast_id); |
| rmode = RelocInfo::CODE_TARGET_WITH_ID; |
| } |
| AllowDeferredHandleDereference using_raw_address; |
| Call(reinterpret_cast<Address>(code.location()), rmode, cond); |
| DCHECK_EQ(expected_size, SizeOfCodeGeneratedSince(&start)); |
| } |
| |
| |
| void MacroAssembler::Ret(Condition cond) { |
| DCHECK(cond == al); |
| blr(); |
| } |
| |
| |
| void MacroAssembler::Drop(int count, Condition cond) { |
| DCHECK(cond == al); |
| if (count > 0) { |
| Add(sp, sp, count * kPointerSize, r0); |
| } |
| } |
| |
| |
| void MacroAssembler::Ret(int drop, Condition cond) { |
| Drop(drop, cond); |
| Ret(cond); |
| } |
| |
| |
| void MacroAssembler::Call(Label* target) { b(target, SetLK); } |
| |
| |
| void MacroAssembler::Push(Handle<Object> handle) { |
| mov(r0, Operand(handle)); |
| push(r0); |
| } |
| |
| |
| void MacroAssembler::Move(Register dst, Handle<Object> value) { |
| AllowDeferredHandleDereference smi_check; |
| if (value->IsSmi()) { |
| LoadSmiLiteral(dst, reinterpret_cast<Smi*>(*value)); |
| } else { |
| DCHECK(value->IsHeapObject()); |
| if (isolate()->heap()->InNewSpace(*value)) { |
| Handle<Cell> cell = isolate()->factory()->NewCell(value); |
| mov(dst, Operand(cell)); |
| LoadP(dst, FieldMemOperand(dst, Cell::kValueOffset)); |
| } else { |
| mov(dst, Operand(value)); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Move(Register dst, Register src, Condition cond) { |
| DCHECK(cond == al); |
| if (!dst.is(src)) { |
| mr(dst, src); |
| } |
| } |
| |
| |
| void MacroAssembler::Move(DoubleRegister dst, DoubleRegister src) { |
| if (!dst.is(src)) { |
| fmr(dst, src); |
| } |
| } |
| |
| |
| void MacroAssembler::MultiPush(RegList regs) { |
| int16_t num_to_push = NumberOfBitsSet(regs); |
| int16_t stack_offset = num_to_push * kPointerSize; |
| |
| subi(sp, sp, Operand(stack_offset)); |
| for (int16_t i = kNumRegisters - 1; i >= 0; i--) { |
| if ((regs & (1 << i)) != 0) { |
| stack_offset -= kPointerSize; |
| StoreP(ToRegister(i), MemOperand(sp, stack_offset)); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::MultiPop(RegList regs) { |
| int16_t stack_offset = 0; |
| |
| for (int16_t i = 0; i < kNumRegisters; i++) { |
| if ((regs & (1 << i)) != 0) { |
| LoadP(ToRegister(i), MemOperand(sp, stack_offset)); |
| stack_offset += kPointerSize; |
| } |
| } |
| addi(sp, sp, Operand(stack_offset)); |
| } |
| |
| |
| void MacroAssembler::LoadRoot(Register destination, Heap::RootListIndex index, |
| Condition cond) { |
| DCHECK(cond == al); |
| LoadP(destination, MemOperand(kRootRegister, index << kPointerSizeLog2), r0); |
| } |
| |
| |
| void MacroAssembler::StoreRoot(Register source, Heap::RootListIndex index, |
| Condition cond) { |
| DCHECK(cond == al); |
| StoreP(source, MemOperand(kRootRegister, index << kPointerSizeLog2), r0); |
| } |
| |
| |
| void MacroAssembler::InNewSpace(Register object, Register scratch, |
| Condition cond, Label* branch) { |
| // N.B. scratch may be same register as object |
| DCHECK(cond == eq || cond == ne); |
| mov(r0, Operand(ExternalReference::new_space_mask(isolate()))); |
| and_(scratch, object, r0); |
| mov(r0, Operand(ExternalReference::new_space_start(isolate()))); |
| cmp(scratch, r0); |
| b(cond, branch); |
| } |
| |
| |
| void MacroAssembler::RecordWriteField( |
| Register object, int offset, Register value, Register dst, |
| LinkRegisterStatus lr_status, SaveFPRegsMode save_fp, |
| RememberedSetAction remembered_set_action, SmiCheck smi_check, |
| PointersToHereCheck pointers_to_here_check_for_value) { |
| // First, check if a write barrier is even needed. The tests below |
| // catch stores of Smis. |
| Label done; |
| |
| // Skip barrier if writing a smi. |
| if (smi_check == INLINE_SMI_CHECK) { |
| JumpIfSmi(value, &done); |
| } |
| |
| // Although the object register is tagged, the offset is relative to the start |
| // of the object, so so offset must be a multiple of kPointerSize. |
| DCHECK(IsAligned(offset, kPointerSize)); |
| |
| Add(dst, object, offset - kHeapObjectTag, r0); |
| if (emit_debug_code()) { |
| Label ok; |
| andi(r0, dst, Operand((1 << kPointerSizeLog2) - 1)); |
| beq(&ok, cr0); |
| stop("Unaligned cell in write barrier"); |
| bind(&ok); |
| } |
| |
| RecordWrite(object, dst, value, lr_status, save_fp, remembered_set_action, |
| OMIT_SMI_CHECK, pointers_to_here_check_for_value); |
| |
| bind(&done); |
| |
| // Clobber clobbered input registers when running with the debug-code flag |
| // turned on to provoke errors. |
| if (emit_debug_code()) { |
| mov(value, Operand(bit_cast<intptr_t>(kZapValue + 4))); |
| mov(dst, Operand(bit_cast<intptr_t>(kZapValue + 8))); |
| } |
| } |
| |
| |
| // Will clobber 4 registers: object, map, dst, ip. The |
| // register 'object' contains a heap object pointer. |
| void MacroAssembler::RecordWriteForMap(Register object, Register map, |
| Register dst, |
| LinkRegisterStatus lr_status, |
| SaveFPRegsMode fp_mode) { |
| if (emit_debug_code()) { |
| LoadP(dst, FieldMemOperand(map, HeapObject::kMapOffset)); |
| Cmpi(dst, Operand(isolate()->factory()->meta_map()), r0); |
| Check(eq, kWrongAddressOrValuePassedToRecordWrite); |
| } |
| |
| if (!FLAG_incremental_marking) { |
| return; |
| } |
| |
| if (emit_debug_code()) { |
| LoadP(ip, FieldMemOperand(object, HeapObject::kMapOffset)); |
| cmp(ip, map); |
| Check(eq, kWrongAddressOrValuePassedToRecordWrite); |
| } |
| |
| Label done; |
| |
| // A single check of the map's pages interesting flag suffices, since it is |
| // only set during incremental collection, and then it's also guaranteed that |
| // the from object's page's interesting flag is also set. This optimization |
| // relies on the fact that maps can never be in new space. |
| CheckPageFlag(map, |
| map, // Used as scratch. |
| MemoryChunk::kPointersToHereAreInterestingMask, eq, &done); |
| |
| addi(dst, object, Operand(HeapObject::kMapOffset - kHeapObjectTag)); |
| if (emit_debug_code()) { |
| Label ok; |
| andi(r0, dst, Operand((1 << kPointerSizeLog2) - 1)); |
| beq(&ok, cr0); |
| stop("Unaligned cell in write barrier"); |
| bind(&ok); |
| } |
| |
| // Record the actual write. |
| if (lr_status == kLRHasNotBeenSaved) { |
| mflr(r0); |
| push(r0); |
| } |
| RecordWriteStub stub(isolate(), object, map, dst, OMIT_REMEMBERED_SET, |
| fp_mode); |
| CallStub(&stub); |
| if (lr_status == kLRHasNotBeenSaved) { |
| pop(r0); |
| mtlr(r0); |
| } |
| |
| bind(&done); |
| |
| // Count number of write barriers in generated code. |
| isolate()->counters()->write_barriers_static()->Increment(); |
| IncrementCounter(isolate()->counters()->write_barriers_dynamic(), 1, ip, dst); |
| |
| // Clobber clobbered registers when running with the debug-code flag |
| // turned on to provoke errors. |
| if (emit_debug_code()) { |
| mov(dst, Operand(bit_cast<intptr_t>(kZapValue + 12))); |
| mov(map, Operand(bit_cast<intptr_t>(kZapValue + 16))); |
| } |
| } |
| |
| |
| // Will clobber 4 registers: object, address, scratch, ip. The |
| // register 'object' contains a heap object pointer. The heap object |
| // tag is shifted away. |
| void MacroAssembler::RecordWrite( |
| Register object, Register address, Register value, |
| LinkRegisterStatus lr_status, SaveFPRegsMode fp_mode, |
| RememberedSetAction remembered_set_action, SmiCheck smi_check, |
| PointersToHereCheck pointers_to_here_check_for_value) { |
| DCHECK(!object.is(value)); |
| if (emit_debug_code()) { |
| LoadP(r0, MemOperand(address)); |
| cmp(r0, value); |
| Check(eq, kWrongAddressOrValuePassedToRecordWrite); |
| } |
| |
| if (remembered_set_action == OMIT_REMEMBERED_SET && |
| !FLAG_incremental_marking) { |
| return; |
| } |
| |
| // First, check if a write barrier is even needed. The tests below |
| // catch stores of smis and stores into the young generation. |
| Label done; |
| |
| if (smi_check == INLINE_SMI_CHECK) { |
| JumpIfSmi(value, &done); |
| } |
| |
| if (pointers_to_here_check_for_value != kPointersToHereAreAlwaysInteresting) { |
| CheckPageFlag(value, |
| value, // Used as scratch. |
| MemoryChunk::kPointersToHereAreInterestingMask, eq, &done); |
| } |
| CheckPageFlag(object, |
| value, // Used as scratch. |
| MemoryChunk::kPointersFromHereAreInterestingMask, eq, &done); |
| |
| // Record the actual write. |
| if (lr_status == kLRHasNotBeenSaved) { |
| mflr(r0); |
| push(r0); |
| } |
| RecordWriteStub stub(isolate(), object, value, address, remembered_set_action, |
| fp_mode); |
| CallStub(&stub); |
| if (lr_status == kLRHasNotBeenSaved) { |
| pop(r0); |
| mtlr(r0); |
| } |
| |
| bind(&done); |
| |
| // Count number of write barriers in generated code. |
| isolate()->counters()->write_barriers_static()->Increment(); |
| IncrementCounter(isolate()->counters()->write_barriers_dynamic(), 1, ip, |
| value); |
| |
| // Clobber clobbered registers when running with the debug-code flag |
| // turned on to provoke errors. |
| if (emit_debug_code()) { |
| mov(address, Operand(bit_cast<intptr_t>(kZapValue + 12))); |
| mov(value, Operand(bit_cast<intptr_t>(kZapValue + 16))); |
| } |
| } |
| |
| |
| void MacroAssembler::RememberedSetHelper(Register object, // For debug tests. |
| Register address, Register scratch, |
| SaveFPRegsMode fp_mode, |
| RememberedSetFinalAction and_then) { |
| Label done; |
| if (emit_debug_code()) { |
| Label ok; |
| JumpIfNotInNewSpace(object, scratch, &ok); |
| stop("Remembered set pointer is in new space"); |
| bind(&ok); |
| } |
| // Load store buffer top. |
| ExternalReference store_buffer = |
| ExternalReference::store_buffer_top(isolate()); |
| mov(ip, Operand(store_buffer)); |
| LoadP(scratch, MemOperand(ip)); |
| // Store pointer to buffer and increment buffer top. |
| StoreP(address, MemOperand(scratch)); |
| addi(scratch, scratch, Operand(kPointerSize)); |
| // Write back new top of buffer. |
| StoreP(scratch, MemOperand(ip)); |
| // Call stub on end of buffer. |
| // Check for end of buffer. |
| mov(r0, Operand(StoreBuffer::kStoreBufferOverflowBit)); |
| and_(r0, scratch, r0, SetRC); |
| |
| if (and_then == kFallThroughAtEnd) { |
| beq(&done, cr0); |
| } else { |
| DCHECK(and_then == kReturnAtEnd); |
| beq(&done, cr0); |
| } |
| mflr(r0); |
| push(r0); |
| StoreBufferOverflowStub store_buffer_overflow(isolate(), fp_mode); |
| CallStub(&store_buffer_overflow); |
| pop(r0); |
| mtlr(r0); |
| bind(&done); |
| if (and_then == kReturnAtEnd) { |
| Ret(); |
| } |
| } |
| |
| |
| void MacroAssembler::PushFixedFrame(Register marker_reg) { |
| mflr(r0); |
| #if V8_OOL_CONSTANT_POOL |
| if (marker_reg.is_valid()) { |
| Push(r0, fp, kConstantPoolRegister, cp, marker_reg); |
| } else { |
| Push(r0, fp, kConstantPoolRegister, cp); |
| } |
| #else |
| if (marker_reg.is_valid()) { |
| Push(r0, fp, cp, marker_reg); |
| } else { |
| Push(r0, fp, cp); |
| } |
| #endif |
| } |
| |
| |
| void MacroAssembler::PopFixedFrame(Register marker_reg) { |
| #if V8_OOL_CONSTANT_POOL |
| if (marker_reg.is_valid()) { |
| Pop(r0, fp, kConstantPoolRegister, cp, marker_reg); |
| } else { |
| Pop(r0, fp, kConstantPoolRegister, cp); |
| } |
| #else |
| if (marker_reg.is_valid()) { |
| Pop(r0, fp, cp, marker_reg); |
| } else { |
| Pop(r0, fp, cp); |
| } |
| #endif |
| mtlr(r0); |
| } |
| |
| |
| // Push and pop all registers that can hold pointers. |
| void MacroAssembler::PushSafepointRegisters() { |
| // Safepoints expect a block of kNumSafepointRegisters values on the |
| // stack, so adjust the stack for unsaved registers. |
| const int num_unsaved = kNumSafepointRegisters - kNumSafepointSavedRegisters; |
| DCHECK(num_unsaved >= 0); |
| if (num_unsaved > 0) { |
| subi(sp, sp, Operand(num_unsaved * kPointerSize)); |
| } |
| MultiPush(kSafepointSavedRegisters); |
| } |
| |
| |
| void MacroAssembler::PopSafepointRegisters() { |
| const int num_unsaved = kNumSafepointRegisters - kNumSafepointSavedRegisters; |
| MultiPop(kSafepointSavedRegisters); |
| if (num_unsaved > 0) { |
| addi(sp, sp, Operand(num_unsaved * kPointerSize)); |
| } |
| } |
| |
| |
| void MacroAssembler::StoreToSafepointRegisterSlot(Register src, Register dst) { |
| StoreP(src, SafepointRegisterSlot(dst)); |
| } |
| |
| |
| void MacroAssembler::LoadFromSafepointRegisterSlot(Register dst, Register src) { |
| LoadP(dst, SafepointRegisterSlot(src)); |
| } |
| |
| |
| int MacroAssembler::SafepointRegisterStackIndex(int reg_code) { |
| // The registers are pushed starting with the highest encoding, |
| // which means that lowest encodings are closest to the stack pointer. |
| RegList regs = kSafepointSavedRegisters; |
| int index = 0; |
| |
| DCHECK(reg_code >= 0 && reg_code < kNumRegisters); |
| |
| for (int16_t i = 0; i < reg_code; i++) { |
| if ((regs & (1 << i)) != 0) { |
| index++; |
| } |
| } |
| |
| return index; |
| } |
| |
| |
| MemOperand MacroAssembler::SafepointRegisterSlot(Register reg) { |
| return MemOperand(sp, SafepointRegisterStackIndex(reg.code()) * kPointerSize); |
| } |
| |
| |
| MemOperand MacroAssembler::SafepointRegistersAndDoublesSlot(Register reg) { |
| // General purpose registers are pushed last on the stack. |
| int doubles_size = DoubleRegister::NumAllocatableRegisters() * kDoubleSize; |
| int register_offset = SafepointRegisterStackIndex(reg.code()) * kPointerSize; |
| return MemOperand(sp, doubles_size + register_offset); |
| } |
| |
| |
| void MacroAssembler::CanonicalizeNaN(const DoubleRegister dst, |
| const DoubleRegister src) { |
| Label done; |
| |
| // Test for NaN |
| fcmpu(src, src); |
| |
| if (dst.is(src)) { |
| bordered(&done); |
| } else { |
| Label is_nan; |
| bunordered(&is_nan); |
| fmr(dst, src); |
| b(&done); |
| bind(&is_nan); |
| } |
| |
| // Replace with canonical NaN. |
| double nan_value = FixedDoubleArray::canonical_not_the_hole_nan_as_double(); |
| LoadDoubleLiteral(dst, nan_value, r0); |
| |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::ConvertIntToDouble(Register src, |
| DoubleRegister double_dst) { |
| MovIntToDouble(double_dst, src, r0); |
| fcfid(double_dst, double_dst); |
| } |
| |
| |
| void MacroAssembler::ConvertUnsignedIntToDouble(Register src, |
| DoubleRegister double_dst) { |
| MovUnsignedIntToDouble(double_dst, src, r0); |
| fcfid(double_dst, double_dst); |
| } |
| |
| |
| void MacroAssembler::ConvertIntToFloat(const DoubleRegister dst, |
| const Register src, |
| const Register int_scratch) { |
| MovIntToDouble(dst, src, int_scratch); |
| fcfid(dst, dst); |
| frsp(dst, dst); |
| } |
| |
| |
| void MacroAssembler::ConvertDoubleToInt64(const DoubleRegister double_input, |
| #if !V8_TARGET_ARCH_PPC64 |
| const Register dst_hi, |
| #endif |
| const Register dst, |
| const DoubleRegister double_dst, |
| FPRoundingMode rounding_mode) { |
| if (rounding_mode == kRoundToZero) { |
| fctidz(double_dst, double_input); |
| } else { |
| SetRoundingMode(rounding_mode); |
| fctid(double_dst, double_input); |
| ResetRoundingMode(); |
| } |
| |
| MovDoubleToInt64( |
| #if !V8_TARGET_ARCH_PPC64 |
| dst_hi, |
| #endif |
| dst, double_dst); |
| } |
| |
| |
| #if V8_OOL_CONSTANT_POOL |
| void MacroAssembler::LoadConstantPoolPointerRegister( |
| CodeObjectAccessMethod access_method, int ip_code_entry_delta) { |
| Register base; |
| int constant_pool_offset = Code::kConstantPoolOffset - Code::kHeaderSize; |
| if (access_method == CAN_USE_IP) { |
| base = ip; |
| constant_pool_offset += ip_code_entry_delta; |
| } else { |
| DCHECK(access_method == CONSTRUCT_INTERNAL_REFERENCE); |
| base = kConstantPoolRegister; |
| ConstantPoolUnavailableScope constant_pool_unavailable(this); |
| |
| // CheckBuffer() is called too frequently. This will pre-grow |
| // the buffer if needed to avoid spliting the relocation and instructions |
| EnsureSpaceFor(kMovInstructionsNoConstantPool * kInstrSize); |
| |
| uintptr_t code_start = reinterpret_cast<uintptr_t>(pc_) - pc_offset(); |
| mov(base, Operand(code_start, RelocInfo::INTERNAL_REFERENCE)); |
| } |
| LoadP(kConstantPoolRegister, MemOperand(base, constant_pool_offset)); |
| } |
| #endif |
| |
| |
| void MacroAssembler::StubPrologue(int prologue_offset) { |
| LoadSmiLiteral(r11, Smi::FromInt(StackFrame::STUB)); |
| PushFixedFrame(r11); |
| // Adjust FP to point to saved FP. |
| addi(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp)); |
| #if V8_OOL_CONSTANT_POOL |
| // ip contains prologue address |
| LoadConstantPoolPointerRegister(CAN_USE_IP, -prologue_offset); |
| set_ool_constant_pool_available(true); |
| #endif |
| } |
| |
| |
| void MacroAssembler::Prologue(bool code_pre_aging, int prologue_offset) { |
| { |
| PredictableCodeSizeScope predictible_code_size_scope( |
| this, kNoCodeAgeSequenceLength); |
| Assembler::BlockTrampolinePoolScope block_trampoline_pool(this); |
| // The following instructions must remain together and unmodified |
| // for code aging to work properly. |
| if (code_pre_aging) { |
| // Pre-age the code. |
| // This matches the code found in PatchPlatformCodeAge() |
| Code* stub = Code::GetPreAgedCodeAgeStub(isolate()); |
| intptr_t target = reinterpret_cast<intptr_t>(stub->instruction_start()); |
| // Don't use Call -- we need to preserve ip and lr |
| nop(); // marker to detect sequence (see IsOld) |
| mov(r3, Operand(target)); |
| Jump(r3); |
| for (int i = 0; i < kCodeAgingSequenceNops; i++) { |
| nop(); |
| } |
| } else { |
| // This matches the code found in GetNoCodeAgeSequence() |
| PushFixedFrame(r4); |
| // Adjust fp to point to saved fp. |
| addi(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp)); |
| for (int i = 0; i < kNoCodeAgeSequenceNops; i++) { |
| nop(); |
| } |
| } |
| } |
| #if V8_OOL_CONSTANT_POOL |
| // ip contains prologue address |
| LoadConstantPoolPointerRegister(CAN_USE_IP, -prologue_offset); |
| set_ool_constant_pool_available(true); |
| #endif |
| } |
| |
| |
| void MacroAssembler::EnterFrame(StackFrame::Type type, |
| bool load_constant_pool_pointer_reg) { |
| if (FLAG_enable_ool_constant_pool && load_constant_pool_pointer_reg) { |
| PushFixedFrame(); |
| #if V8_OOL_CONSTANT_POOL |
| // This path should not rely on ip containing code entry. |
| LoadConstantPoolPointerRegister(CONSTRUCT_INTERNAL_REFERENCE); |
| #endif |
| LoadSmiLiteral(ip, Smi::FromInt(type)); |
| push(ip); |
| } else { |
| LoadSmiLiteral(ip, Smi::FromInt(type)); |
| PushFixedFrame(ip); |
| } |
| // Adjust FP to point to saved FP. |
| addi(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp)); |
| |
| mov(r0, Operand(CodeObject())); |
| push(r0); |
| } |
| |
| |
| int MacroAssembler::LeaveFrame(StackFrame::Type type, int stack_adjustment) { |
| #if V8_OOL_CONSTANT_POOL |
| ConstantPoolUnavailableScope constant_pool_unavailable(this); |
| #endif |
| // r3: preserved |
| // r4: preserved |
| // r5: preserved |
| |
| // Drop the execution stack down to the frame pointer and restore |
| // the caller frame pointer, return address and constant pool pointer. |
| int frame_ends; |
| LoadP(r0, MemOperand(fp, StandardFrameConstants::kCallerPCOffset)); |
| LoadP(ip, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| #if V8_OOL_CONSTANT_POOL |
| const int exitOffset = ExitFrameConstants::kConstantPoolOffset; |
| const int standardOffset = StandardFrameConstants::kConstantPoolOffset; |
| const int offset = ((type == StackFrame::EXIT) ? exitOffset : standardOffset); |
| LoadP(kConstantPoolRegister, MemOperand(fp, offset)); |
| #endif |
| mtlr(r0); |
| frame_ends = pc_offset(); |
| Add(sp, fp, StandardFrameConstants::kCallerSPOffset + stack_adjustment, r0); |
| mr(fp, ip); |
| return frame_ends; |
| } |
| |
| |
| // ExitFrame layout (probably wrongish.. needs updating) |
| // |
| // SP -> previousSP |
| // LK reserved |
| // code |
| // sp_on_exit (for debug?) |
| // oldSP->prev SP |
| // LK |
| // <parameters on stack> |
| |
| // Prior to calling EnterExitFrame, we've got a bunch of parameters |
| // on the stack that we need to wrap a real frame around.. so first |
| // we reserve a slot for LK and push the previous SP which is captured |
| // in the fp register (r31) |
| // Then - we buy a new frame |
| |
| void MacroAssembler::EnterExitFrame(bool save_doubles, int stack_space) { |
| // Set up the frame structure on the stack. |
| DCHECK_EQ(2 * kPointerSize, ExitFrameConstants::kCallerSPDisplacement); |
| DCHECK_EQ(1 * kPointerSize, ExitFrameConstants::kCallerPCOffset); |
| DCHECK_EQ(0 * kPointerSize, ExitFrameConstants::kCallerFPOffset); |
| DCHECK(stack_space > 0); |
| |
| // This is an opportunity to build a frame to wrap |
| // all of the pushes that have happened inside of V8 |
| // since we were called from C code |
| |
| // replicate ARM frame - TODO make this more closely follow PPC ABI |
| mflr(r0); |
| Push(r0, fp); |
| mr(fp, sp); |
| // Reserve room for saved entry sp and code object. |
| subi(sp, sp, Operand(ExitFrameConstants::kFrameSize)); |
| |
| if (emit_debug_code()) { |
| li(r8, Operand::Zero()); |
| StoreP(r8, MemOperand(fp, ExitFrameConstants::kSPOffset)); |
| } |
| #if V8_OOL_CONSTANT_POOL |
| StoreP(kConstantPoolRegister, |
| MemOperand(fp, ExitFrameConstants::kConstantPoolOffset)); |
| #endif |
| mov(r8, Operand(CodeObject())); |
| StoreP(r8, MemOperand(fp, ExitFrameConstants::kCodeOffset)); |
| |
| // Save the frame pointer and the context in top. |
| mov(r8, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
| StoreP(fp, MemOperand(r8)); |
| mov(r8, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
| StoreP(cp, MemOperand(r8)); |
| |
| // Optionally save all volatile double registers. |
| if (save_doubles) { |
| SaveFPRegs(sp, 0, DoubleRegister::kNumVolatileRegisters); |
| // Note that d0 will be accessible at |
| // fp - ExitFrameConstants::kFrameSize - |
| // kNumVolatileRegisters * kDoubleSize, |
| // since the sp slot and code slot were pushed after the fp. |
| } |
| |
| addi(sp, sp, Operand(-stack_space * kPointerSize)); |
| |
| // Allocate and align the frame preparing for calling the runtime |
| // function. |
| const int frame_alignment = ActivationFrameAlignment(); |
| if (frame_alignment > kPointerSize) { |
| DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
| ClearRightImm(sp, sp, Operand(WhichPowerOf2(frame_alignment))); |
| } |
| li(r0, Operand::Zero()); |
| StorePU(r0, MemOperand(sp, -kNumRequiredStackFrameSlots * kPointerSize)); |
| |
| // Set the exit frame sp value to point just before the return address |
| // location. |
| addi(r8, sp, Operand((kStackFrameExtraParamSlot + 1) * kPointerSize)); |
| StoreP(r8, MemOperand(fp, ExitFrameConstants::kSPOffset)); |
| } |
| |
| |
| void MacroAssembler::InitializeNewString(Register string, Register length, |
| Heap::RootListIndex map_index, |
| Register scratch1, Register scratch2) { |
| SmiTag(scratch1, length); |
| LoadRoot(scratch2, map_index); |
| StoreP(scratch1, FieldMemOperand(string, String::kLengthOffset), r0); |
| li(scratch1, Operand(String::kEmptyHashField)); |
| StoreP(scratch2, FieldMemOperand(string, HeapObject::kMapOffset), r0); |
| StoreP(scratch1, FieldMemOperand(string, String::kHashFieldSlot), r0); |
| } |
| |
| |
| int MacroAssembler::ActivationFrameAlignment() { |
| #if !defined(USE_SIMULATOR) |
| // Running on the real platform. Use the alignment as mandated by the local |
| // environment. |
| // Note: This will break if we ever start generating snapshots on one PPC |
| // platform for another PPC platform with a different alignment. |
| return base::OS::ActivationFrameAlignment(); |
| #else // Simulated |
| // If we are using the simulator then we should always align to the expected |
| // alignment. As the simulator is used to generate snapshots we do not know |
| // if the target platform will need alignment, so this is controlled from a |
| // flag. |
| return FLAG_sim_stack_alignment; |
| #endif |
| } |
| |
| |
| void MacroAssembler::LeaveExitFrame(bool save_doubles, Register argument_count, |
| bool restore_context) { |
| #if V8_OOL_CONSTANT_POOL |
| ConstantPoolUnavailableScope constant_pool_unavailable(this); |
| #endif |
| // Optionally restore all double registers. |
| if (save_doubles) { |
| // Calculate the stack location of the saved doubles and restore them. |
| const int kNumRegs = DoubleRegister::kNumVolatileRegisters; |
| const int offset = |
| (ExitFrameConstants::kFrameSize + kNumRegs * kDoubleSize); |
| addi(r6, fp, Operand(-offset)); |
| RestoreFPRegs(r6, 0, kNumRegs); |
| } |
| |
| // Clear top frame. |
| li(r6, Operand::Zero()); |
| mov(ip, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
| StoreP(r6, MemOperand(ip)); |
| |
| // Restore current context from top and clear it in debug mode. |
| if (restore_context) { |
| mov(ip, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
| LoadP(cp, MemOperand(ip)); |
| } |
| #ifdef DEBUG |
| mov(ip, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
| StoreP(r6, MemOperand(ip)); |
| #endif |
| |
| // Tear down the exit frame, pop the arguments, and return. |
| LeaveFrame(StackFrame::EXIT); |
| |
| if (argument_count.is_valid()) { |
| ShiftLeftImm(argument_count, argument_count, Operand(kPointerSizeLog2)); |
| add(sp, sp, argument_count); |
| } |
| } |
| |
| |
| void MacroAssembler::MovFromFloatResult(const DoubleRegister dst) { |
| Move(dst, d1); |
| } |
| |
| |
| void MacroAssembler::MovFromFloatParameter(const DoubleRegister dst) { |
| Move(dst, d1); |
| } |
| |
| |
| void MacroAssembler::InvokePrologue(const ParameterCount& expected, |
| const ParameterCount& actual, |
| Handle<Code> code_constant, |
| Register code_reg, Label* done, |
| bool* definitely_mismatches, |
| InvokeFlag flag, |
| const CallWrapper& call_wrapper) { |
| bool definitely_matches = false; |
| *definitely_mismatches = false; |
| Label regular_invoke; |
| |
| // Check whether the expected and actual arguments count match. If not, |
| // setup registers according to contract with ArgumentsAdaptorTrampoline: |
| // r3: actual arguments count |
| // r4: function (passed through to callee) |
| // r5: expected arguments count |
| |
| // The code below is made a lot easier because the calling code already sets |
| // up actual and expected registers according to the contract if values are |
| // passed in registers. |
| |
| // ARM has some sanity checks as per below, considering add them for PPC |
| // DCHECK(actual.is_immediate() || actual.reg().is(r3)); |
| // DCHECK(expected.is_immediate() || expected.reg().is(r5)); |
| // DCHECK((!code_constant.is_null() && code_reg.is(no_reg)) |
| // || code_reg.is(r6)); |
| |
| if (expected.is_immediate()) { |
| DCHECK(actual.is_immediate()); |
| if (expected.immediate() == actual.immediate()) { |
| definitely_matches = true; |
| } else { |
| mov(r3, Operand(actual.immediate())); |
| const int sentinel = SharedFunctionInfo::kDontAdaptArgumentsSentinel; |
| if (expected.immediate() == sentinel) { |
| // Don't worry about adapting arguments for builtins that |
| // don't want that done. Skip adaption code by making it look |
| // like we have a match between expected and actual number of |
| // arguments. |
| definitely_matches = true; |
| } else { |
| *definitely_mismatches = true; |
| mov(r5, Operand(expected.immediate())); |
| } |
| } |
| } else { |
| if (actual.is_immediate()) { |
| cmpi(expected.reg(), Operand(actual.immediate())); |
| beq(®ular_invoke); |
| mov(r3, Operand(actual.immediate())); |
| } else { |
| cmp(expected.reg(), actual.reg()); |
| beq(®ular_invoke); |
| } |
| } |
| |
| if (!definitely_matches) { |
| if (!code_constant.is_null()) { |
| mov(r6, Operand(code_constant)); |
| addi(r6, r6, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| } |
| |
| Handle<Code> adaptor = isolate()->builtins()->ArgumentsAdaptorTrampoline(); |
| if (flag == CALL_FUNCTION) { |
| call_wrapper.BeforeCall(CallSize(adaptor)); |
| Call(adaptor); |
| call_wrapper.AfterCall(); |
| if (!*definitely_mismatches) { |
| b(done); |
| } |
| } else { |
| Jump(adaptor, RelocInfo::CODE_TARGET); |
| } |
| bind(®ular_invoke); |
| } |
| } |
| |
| |
| void MacroAssembler::InvokeCode(Register code, const ParameterCount& expected, |
| const ParameterCount& actual, InvokeFlag flag, |
| const CallWrapper& call_wrapper) { |
| // You can't call a function without a valid frame. |
| DCHECK(flag == JUMP_FUNCTION || has_frame()); |
| |
| Label done; |
| bool definitely_mismatches = false; |
| InvokePrologue(expected, actual, Handle<Code>::null(), code, &done, |
| &definitely_mismatches, flag, call_wrapper); |
| if (!definitely_mismatches) { |
| if (flag == CALL_FUNCTION) { |
| call_wrapper.BeforeCall(CallSize(code)); |
| CallJSEntry(code); |
| call_wrapper.AfterCall(); |
| } else { |
| DCHECK(flag == JUMP_FUNCTION); |
| JumpToJSEntry(code); |
| } |
| |
| // Continue here if InvokePrologue does handle the invocation due to |
| // mismatched parameter counts. |
| bind(&done); |
| } |
| } |
| |
| |
| void MacroAssembler::InvokeFunction(Register fun, const ParameterCount& actual, |
| InvokeFlag flag, |
| const CallWrapper& call_wrapper) { |
| // You can't call a function without a valid frame. |
| DCHECK(flag == JUMP_FUNCTION || has_frame()); |
| |
| // Contract with called JS functions requires that function is passed in r4. |
| DCHECK(fun.is(r4)); |
| |
| Register expected_reg = r5; |
| Register code_reg = ip; |
| |
| LoadP(code_reg, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset)); |
| LoadP(cp, FieldMemOperand(r4, JSFunction::kContextOffset)); |
| LoadWordArith(expected_reg, |
| FieldMemOperand( |
| code_reg, SharedFunctionInfo::kFormalParameterCountOffset)); |
| #if !defined(V8_TARGET_ARCH_PPC64) |
| SmiUntag(expected_reg); |
| #endif |
| LoadP(code_reg, FieldMemOperand(r4, JSFunction::kCodeEntryOffset)); |
| |
| ParameterCount expected(expected_reg); |
| InvokeCode(code_reg, expected, actual, flag, call_wrapper); |
| } |
| |
| |
| void MacroAssembler::InvokeFunction(Register function, |
| const ParameterCount& expected, |
| const ParameterCount& actual, |
| InvokeFlag flag, |
| const CallWrapper& call_wrapper) { |
| // You can't call a function without a valid frame. |
| DCHECK(flag == JUMP_FUNCTION || has_frame()); |
| |
| // Contract with called JS functions requires that function is passed in r4. |
| DCHECK(function.is(r4)); |
| |
| // Get the function and setup the context. |
| LoadP(cp, FieldMemOperand(r4, JSFunction::kContextOffset)); |
| |
| // We call indirectly through the code field in the function to |
| // allow recompilation to take effect without changing any of the |
| // call sites. |
| LoadP(ip, FieldMemOperand(r4, JSFunction::kCodeEntryOffset)); |
| InvokeCode(ip, expected, actual, flag, call_wrapper); |
| } |
| |
| |
| void MacroAssembler::InvokeFunction(Handle<JSFunction> function, |
| const ParameterCount& expected, |
| const ParameterCount& actual, |
| InvokeFlag flag, |
| const CallWrapper& call_wrapper) { |
| Move(r4, function); |
| InvokeFunction(r4, expected, actual, flag, call_wrapper); |
| } |
| |
| |
| void MacroAssembler::IsObjectJSObjectType(Register heap_object, Register map, |
| Register scratch, Label* fail) { |
| LoadP(map, FieldMemOperand(heap_object, HeapObject::kMapOffset)); |
| IsInstanceJSObjectType(map, scratch, fail); |
| } |
| |
| |
| void MacroAssembler::IsInstanceJSObjectType(Register map, Register scratch, |
| Label* fail) { |
| lbz(scratch, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| cmpi(scratch, Operand(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
| blt(fail); |
| cmpi(scratch, Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
| bgt(fail); |
| } |
| |
| |
| void MacroAssembler::IsObjectJSStringType(Register object, Register scratch, |
| Label* fail) { |
| DCHECK(kNotStringTag != 0); |
| |
| LoadP(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| lbz(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| andi(r0, scratch, Operand(kIsNotStringMask)); |
| bne(fail, cr0); |
| } |
| |
| |
| void MacroAssembler::IsObjectNameType(Register object, Register scratch, |
| Label* fail) { |
| LoadP(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| lbz(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| cmpi(scratch, Operand(LAST_NAME_TYPE)); |
| bgt(fail); |
| } |
| |
| |
| void MacroAssembler::DebugBreak() { |
| li(r3, Operand::Zero()); |
| mov(r4, Operand(ExternalReference(Runtime::kDebugBreak, isolate()))); |
| CEntryStub ces(isolate(), 1); |
| DCHECK(AllowThisStubCall(&ces)); |
| Call(ces.GetCode(), RelocInfo::DEBUG_BREAK); |
| } |
| |
| |
| void MacroAssembler::PushTryHandler(StackHandler::Kind kind, |
| int handler_index) { |
| // Adjust this code if not the case. |
| STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize); |
| STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0 * kPointerSize); |
| STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize); |
| STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize); |
| STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize); |
| STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize); |
| |
| // For the JSEntry handler, we must preserve r1-r7, r0,r8-r15 are available. |
| // We want the stack to look like |
| // sp -> NextOffset |
| // CodeObject |
| // state |
| // context |
| // frame pointer |
| |
| // Link the current handler as the next handler. |
| mov(r8, Operand(ExternalReference(Isolate::kHandlerAddress, isolate()))); |
| LoadP(r0, MemOperand(r8)); |
| StorePU(r0, MemOperand(sp, -StackHandlerConstants::kSize)); |
| // Set this new handler as the current one. |
| StoreP(sp, MemOperand(r8)); |
| |
| if (kind == StackHandler::JS_ENTRY) { |
| li(r8, Operand::Zero()); // NULL frame pointer. |
| StoreP(r8, MemOperand(sp, StackHandlerConstants::kFPOffset)); |
| LoadSmiLiteral(r8, Smi::FromInt(0)); // Indicates no context. |
| StoreP(r8, MemOperand(sp, StackHandlerConstants::kContextOffset)); |
| } else { |
| // still not sure if fp is right |
| StoreP(fp, MemOperand(sp, StackHandlerConstants::kFPOffset)); |
| StoreP(cp, MemOperand(sp, StackHandlerConstants::kContextOffset)); |
| } |
| unsigned state = StackHandler::IndexField::encode(handler_index) | |
| StackHandler::KindField::encode(kind); |
| LoadIntLiteral(r8, state); |
| StoreP(r8, MemOperand(sp, StackHandlerConstants::kStateOffset)); |
| mov(r8, Operand(CodeObject())); |
| StoreP(r8, MemOperand(sp, StackHandlerConstants::kCodeOffset)); |
| } |
| |
| |
| void MacroAssembler::PopTryHandler() { |
| STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0); |
| pop(r4); |
| mov(ip, Operand(ExternalReference(Isolate::kHandlerAddress, isolate()))); |
| addi(sp, sp, Operand(StackHandlerConstants::kSize - kPointerSize)); |
| StoreP(r4, MemOperand(ip)); |
| } |
| |
| |
| // PPC - make use of ip as a temporary register |
| void MacroAssembler::JumpToHandlerEntry() { |
| // Compute the handler entry address and jump to it. The handler table is |
| // a fixed array of (smi-tagged) code offsets. |
| // r3 = exception, r4 = code object, r5 = state. |
| #if V8_OOL_CONSTANT_POOL |
| ConstantPoolUnavailableScope constant_pool_unavailable(this); |
| LoadP(kConstantPoolRegister, FieldMemOperand(r4, Code::kConstantPoolOffset)); |
| #endif |
| LoadP(r6, FieldMemOperand(r4, Code::kHandlerTableOffset)); // Handler table. |
| addi(r6, r6, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| srwi(r5, r5, Operand(StackHandler::kKindWidth)); // Handler index. |
| slwi(ip, r5, Operand(kPointerSizeLog2)); |
| add(ip, r6, ip); |
| LoadP(r5, MemOperand(ip)); // Smi-tagged offset. |
| addi(r4, r4, Operand(Code::kHeaderSize - kHeapObjectTag)); // Code start. |
| SmiUntag(ip, r5); |
| add(r0, r4, ip); |
| mtctr(r0); |
| bctr(); |
| } |
| |
| |
| void MacroAssembler::Throw(Register value) { |
| // Adjust this code if not the case. |
| STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize); |
| STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0); |
| STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize); |
| STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize); |
| STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize); |
| STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize); |
| Label skip; |
| |
| // The exception is expected in r3. |
| if (!value.is(r3)) { |
| mr(r3, value); |
| } |
| // Drop the stack pointer to the top of the top handler. |
| mov(r6, Operand(ExternalReference(Isolate::kHandlerAddress, isolate()))); |
| LoadP(sp, MemOperand(r6)); |
| // Restore the next handler. |
| pop(r5); |
| StoreP(r5, MemOperand(r6)); |
| |
| // Get the code object (r4) and state (r5). Restore the context and frame |
| // pointer. |
| pop(r4); |
| pop(r5); |
| pop(cp); |
| pop(fp); |
| |
| // If the handler is a JS frame, restore the context to the frame. |
| // (kind == ENTRY) == (fp == 0) == (cp == 0), so we could test either fp |
| // or cp. |
| cmpi(cp, Operand::Zero()); |
| beq(&skip); |
| StoreP(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| bind(&skip); |
| |
| JumpToHandlerEntry(); |
| } |
| |
| |
| void MacroAssembler::ThrowUncatchable(Register value) { |
| // Adjust this code if not the case. |
| STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize); |
| STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0 * kPointerSize); |
| STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize); |
| STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize); |
| STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize); |
| STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize); |
| |
| // The exception is expected in r3. |
| if (!value.is(r3)) { |
| mr(r3, value); |
| } |
| // Drop the stack pointer to the top of the top stack handler. |
| mov(r6, Operand(ExternalReference(Isolate::kHandlerAddress, isolate()))); |
| LoadP(sp, MemOperand(r6)); |
| |
| // Unwind the handlers until the ENTRY handler is found. |
| Label fetch_next, check_kind; |
| b(&check_kind); |
| bind(&fetch_next); |
| LoadP(sp, MemOperand(sp, StackHandlerConstants::kNextOffset)); |
| |
| bind(&check_kind); |
| STATIC_ASSERT(StackHandler::JS_ENTRY == 0); |
| LoadP(r5, MemOperand(sp, StackHandlerConstants::kStateOffset)); |
| andi(r0, r5, Operand(StackHandler::KindField::kMask)); |
| bne(&fetch_next, cr0); |
| |
| // Set the top handler address to next handler past the top ENTRY handler. |
| pop(r5); |
| StoreP(r5, MemOperand(r6)); |
| // Get the code object (r4) and state (r5). Clear the context and frame |
| // pointer (0 was saved in the handler). |
| pop(r4); |
| pop(r5); |
| pop(cp); |
| pop(fp); |
| |
| JumpToHandlerEntry(); |
| } |
| |
| |
| void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg, |
| Register scratch, Label* miss) { |
| Label same_contexts; |
| |
| DCHECK(!holder_reg.is(scratch)); |
| DCHECK(!holder_reg.is(ip)); |
| DCHECK(!scratch.is(ip)); |
| |
| // Load current lexical context from the stack frame. |
| LoadP(scratch, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| // In debug mode, make sure the lexical context is set. |
| #ifdef DEBUG |
| cmpi(scratch, Operand::Zero()); |
| Check(ne, kWeShouldNotHaveAnEmptyLexicalContext); |
| #endif |
| |
| // Load the native context of the current context. |
| int offset = |
| Context::kHeaderSize + Context::GLOBAL_OBJECT_INDEX * kPointerSize; |
| LoadP(scratch, FieldMemOperand(scratch, offset)); |
| LoadP(scratch, FieldMemOperand(scratch, GlobalObject::kNativeContextOffset)); |
| |
| // Check the context is a native context. |
| if (emit_debug_code()) { |
| // Cannot use ip as a temporary in this verification code. Due to the fact |
| // that ip is clobbered as part of cmp with an object Operand. |
| push(holder_reg); // Temporarily save holder on the stack. |
| // Read the first word and compare to the native_context_map. |
| LoadP(holder_reg, FieldMemOperand(scratch, HeapObject::kMapOffset)); |
| LoadRoot(ip, Heap::kNativeContextMapRootIndex); |
| cmp(holder_reg, ip); |
| Check(eq, kJSGlobalObjectNativeContextShouldBeANativeContext); |
| pop(holder_reg); // Restore holder. |
| } |
| |
| // Check if both contexts are the same. |
| LoadP(ip, FieldMemOperand(holder_reg, JSGlobalProxy::kNativeContextOffset)); |
| cmp(scratch, ip); |
| beq(&same_contexts); |
| |
| // Check the context is a native context. |
| if (emit_debug_code()) { |
| // Cannot use ip as a temporary in this verification code. Due to the fact |
| // that ip is clobbered as part of cmp with an object Operand. |
| push(holder_reg); // Temporarily save holder on the stack. |
| mr(holder_reg, ip); // Move ip to its holding place. |
| LoadRoot(ip, Heap::kNullValueRootIndex); |
| cmp(holder_reg, ip); |
| Check(ne, kJSGlobalProxyContextShouldNotBeNull); |
| |
| LoadP(holder_reg, FieldMemOperand(holder_reg, HeapObject::kMapOffset)); |
| LoadRoot(ip, Heap::kNativeContextMapRootIndex); |
| cmp(holder_reg, ip); |
| Check(eq, kJSGlobalObjectNativeContextShouldBeANativeContext); |
| // Restore ip is not needed. ip is reloaded below. |
| pop(holder_reg); // Restore holder. |
| // Restore ip to holder's context. |
| LoadP(ip, FieldMemOperand(holder_reg, JSGlobalProxy::kNativeContextOffset)); |
| } |
| |
| // Check that the security token in the calling global object is |
| // compatible with the security token in the receiving global |
| // object. |
| int token_offset = |
| Context::kHeaderSize + Context::SECURITY_TOKEN_INDEX * kPointerSize; |
| |
| LoadP(scratch, FieldMemOperand(scratch, token_offset)); |
| LoadP(ip, FieldMemOperand(ip, token_offset)); |
| cmp(scratch, ip); |
| bne(miss); |
| |
| bind(&same_contexts); |
| } |
| |
| |
| // Compute the hash code from the untagged key. This must be kept in sync with |
| // ComputeIntegerHash in utils.h and KeyedLoadGenericStub in |
| // code-stub-hydrogen.cc |
| void MacroAssembler::GetNumberHash(Register t0, Register scratch) { |
| // First of all we assign the hash seed to scratch. |
| LoadRoot(scratch, Heap::kHashSeedRootIndex); |
| SmiUntag(scratch); |
| |
| // Xor original key with a seed. |
| xor_(t0, t0, scratch); |
| |
| // Compute the hash code from the untagged key. This must be kept in sync |
| // with ComputeIntegerHash in utils.h. |
| // |
| // hash = ~hash + (hash << 15); |
| notx(scratch, t0); |
| slwi(t0, t0, Operand(15)); |
| add(t0, scratch, t0); |
| // hash = hash ^ (hash >> 12); |
| srwi(scratch, t0, Operand(12)); |
| xor_(t0, t0, scratch); |
| // hash = hash + (hash << 2); |
| slwi(scratch, t0, Operand(2)); |
| add(t0, t0, scratch); |
| // hash = hash ^ (hash >> 4); |
| srwi(scratch, t0, Operand(4)); |
| xor_(t0, t0, scratch); |
| // hash = hash * 2057; |
| mr(r0, t0); |
| slwi(scratch, t0, Operand(3)); |
| add(t0, t0, scratch); |
| slwi(scratch, r0, Operand(11)); |
| add(t0, t0, scratch); |
| // hash = hash ^ (hash >> 16); |
| srwi(scratch, t0, Operand(16)); |
| xor_(t0, t0, scratch); |
| } |
| |
| |
| void MacroAssembler::LoadFromNumberDictionary(Label* miss, Register elements, |
| Register key, Register result, |
| Register t0, Register t1, |
| Register t2) { |
| // Register use: |
| // |
| // elements - holds the slow-case elements of the receiver on entry. |
| // Unchanged unless 'result' is the same register. |
| // |
| // key - holds the smi key on entry. |
| // Unchanged unless 'result' is the same register. |
| // |
| // result - holds the result on exit if the load succeeded. |
| // Allowed to be the same as 'key' or 'result'. |
| // Unchanged on bailout so 'key' or 'result' can be used |
| // in further computation. |
| // |
| // Scratch registers: |
| // |
| // t0 - holds the untagged key on entry and holds the hash once computed. |
| // |
| // t1 - used to hold the capacity mask of the dictionary |
| // |
| // t2 - used for the index into the dictionary. |
| Label done; |
| |
| GetNumberHash(t0, t1); |
| |
| // Compute the capacity mask. |
| LoadP(t1, FieldMemOperand(elements, SeededNumberDictionary::kCapacityOffset)); |
| SmiUntag(t1); |
| subi(t1, t1, Operand(1)); |
| |
| // Generate an unrolled loop that performs a few probes before giving up. |
| for (int i = 0; i < kNumberDictionaryProbes; i++) { |
| // Use t2 for index calculations and keep the hash intact in t0. |
| mr(t2, t0); |
| // Compute the masked index: (hash + i + i * i) & mask. |
| if (i > 0) { |
| addi(t2, t2, Operand(SeededNumberDictionary::GetProbeOffset(i))); |
| } |
| and_(t2, t2, t1); |
| |
| // Scale the index by multiplying by the element size. |
| DCHECK(SeededNumberDictionary::kEntrySize == 3); |
| slwi(ip, t2, Operand(1)); |
| add(t2, t2, ip); // t2 = t2 * 3 |
| |
| // Check if the key is identical to the name. |
| slwi(t2, t2, Operand(kPointerSizeLog2)); |
| add(t2, elements, t2); |
| LoadP(ip, |
| FieldMemOperand(t2, SeededNumberDictionary::kElementsStartOffset)); |
| cmp(key, ip); |
| if (i != kNumberDictionaryProbes - 1) { |
| beq(&done); |
| } else { |
| bne(miss); |
| } |
| } |
| |
| bind(&done); |
| // Check that the value is a field property. |
| // t2: elements + (index * kPointerSize) |
| const int kDetailsOffset = |
| SeededNumberDictionary::kElementsStartOffset + 2 * kPointerSize; |
| LoadP(t1, FieldMemOperand(t2, kDetailsOffset)); |
| LoadSmiLiteral(ip, Smi::FromInt(PropertyDetails::TypeField::kMask)); |
| DCHECK_EQ(DATA, 0); |
| and_(r0, t1, ip, SetRC); |
| bne(miss, cr0); |
| |
| // Get the value at the masked, scaled index and return. |
| const int kValueOffset = |
| SeededNumberDictionary::kElementsStartOffset + kPointerSize; |
| LoadP(result, FieldMemOperand(t2, kValueOffset)); |
| } |
| |
| |
| void MacroAssembler::Allocate(int object_size, Register result, |
| Register scratch1, Register scratch2, |
| Label* gc_required, AllocationFlags flags) { |
| DCHECK(object_size <= Page::kMaxRegularHeapObjectSize); |
| if (!FLAG_inline_new) { |
| if (emit_debug_code()) { |
| // Trash the registers to simulate an allocation failure. |
| li(result, Operand(0x7091)); |
| li(scratch1, Operand(0x7191)); |
| li(scratch2, Operand(0x7291)); |
| } |
| b(gc_required); |
| return; |
| } |
| |
| DCHECK(!result.is(scratch1)); |
| DCHECK(!result.is(scratch2)); |
| DCHECK(!scratch1.is(scratch2)); |
| DCHECK(!scratch1.is(ip)); |
| DCHECK(!scratch2.is(ip)); |
| |
| // Make object size into bytes. |
| if ((flags & SIZE_IN_WORDS) != 0) { |
| object_size *= kPointerSize; |
| } |
| DCHECK_EQ(0, static_cast<int>(object_size & kObjectAlignmentMask)); |
| |
| // Check relative positions of allocation top and limit addresses. |
| ExternalReference allocation_top = |
| AllocationUtils::GetAllocationTopReference(isolate(), flags); |
| ExternalReference allocation_limit = |
| AllocationUtils::GetAllocationLimitReference(isolate(), flags); |
| |
| intptr_t top = reinterpret_cast<intptr_t>(allocation_top.address()); |
| intptr_t limit = reinterpret_cast<intptr_t>(allocation_limit.address()); |
| DCHECK((limit - top) == kPointerSize); |
| |
| // Set up allocation top address register. |
| Register topaddr = scratch1; |
| mov(topaddr, Operand(allocation_top)); |
| |
| // This code stores a temporary value in ip. This is OK, as the code below |
| // does not need ip for implicit literal generation. |
| if ((flags & RESULT_CONTAINS_TOP) == 0) { |
| // Load allocation top into result and allocation limit into ip. |
| LoadP(result, MemOperand(topaddr)); |
| LoadP(ip, MemOperand(topaddr, kPointerSize)); |
| } else { |
| if (emit_debug_code()) { |
| // Assert that result actually contains top on entry. ip is used |
| // immediately below so this use of ip does not cause difference with |
| // respect to register content between debug and release mode. |
| LoadP(ip, MemOperand(topaddr)); |
| cmp(result, ip); |
| Check(eq, kUnexpectedAllocationTop); |
| } |
| // Load allocation limit into ip. Result already contains allocation top. |
| LoadP(ip, MemOperand(topaddr, limit - top), r0); |
| } |
| |
| if ((flags & DOUBLE_ALIGNMENT) != 0) { |
| // Align the next allocation. Storing the filler map without checking top is |
| // safe in new-space because the limit of the heap is aligned there. |
| DCHECK((flags & PRETENURE_OLD_POINTER_SPACE) == 0); |
| #if V8_TARGET_ARCH_PPC64 |
| STATIC_ASSERT(kPointerAlignment == kDoubleAlignment); |
| #else |
| STATIC_ASSERT(kPointerAlignment * 2 == kDoubleAlignment); |
| andi(scratch2, result, Operand(kDoubleAlignmentMask)); |
| Label aligned; |
| beq(&aligned, cr0); |
| if ((flags & PRETENURE_OLD_DATA_SPACE) != 0) { |
| cmpl(result, ip); |
| bge(gc_required); |
| } |
| mov(scratch2, Operand(isolate()->factory()->one_pointer_filler_map())); |
| stw(scratch2, MemOperand(result)); |
| addi(result, result, Operand(kDoubleSize / 2)); |
| bind(&aligned); |
| #endif |
| } |
| |
| // Calculate new top and bail out if new space is exhausted. Use result |
| // to calculate the new top. |
| sub(r0, ip, result); |
| if (is_int16(object_size)) { |
| cmpi(r0, Operand(object_size)); |
| blt(gc_required); |
| addi(scratch2, result, Operand(object_size)); |
| } else { |
| Cmpi(r0, Operand(object_size), scratch2); |
| blt(gc_required); |
| add(scratch2, result, scratch2); |
| } |
| StoreP(scratch2, MemOperand(topaddr)); |
| |
| // Tag object if requested. |
| if ((flags & TAG_OBJECT) != 0) { |
| addi(result, result, Operand(kHeapObjectTag)); |
| } |
| } |
| |
| |
| void MacroAssembler::Allocate(Register object_size, Register result, |
| Register scratch1, Register scratch2, |
| Label* gc_required, AllocationFlags flags) { |
| if (!FLAG_inline_new) { |
| if (emit_debug_code()) { |
| // Trash the registers to simulate an allocation failure. |
| li(result, Operand(0x7091)); |
| li(scratch1, Operand(0x7191)); |
| li(scratch2, Operand(0x7291)); |
| } |
| b(gc_required); |
| return; |
| } |
| |
| // Assert that the register arguments are different and that none of |
| // them are ip. ip is used explicitly in the code generated below. |
| DCHECK(!result.is(scratch1)); |
| DCHECK(!result.is(scratch2)); |
| DCHECK(!scratch1.is(scratch2)); |
| DCHECK(!object_size.is(ip)); |
| DCHECK(!result.is(ip)); |
| DCHECK(!scratch1.is(ip)); |
| DCHECK(!scratch2.is(ip)); |
| |
| // Check relative positions of allocation top and limit addresses. |
| ExternalReference allocation_top = |
| AllocationUtils::GetAllocationTopReference(isolate(), flags); |
| ExternalReference allocation_limit = |
| AllocationUtils::GetAllocationLimitReference(isolate(), flags); |
| intptr_t top = reinterpret_cast<intptr_t>(allocation_top.address()); |
| intptr_t limit = reinterpret_cast<intptr_t>(allocation_limit.address()); |
| DCHECK((limit - top) == kPointerSize); |
| |
| // Set up allocation top address. |
| Register topaddr = scratch1; |
| mov(topaddr, Operand(allocation_top)); |
| |
| // This code stores a temporary value in ip. This is OK, as the code below |
| // does not need ip for implicit literal generation. |
| if ((flags & RESULT_CONTAINS_TOP) == 0) { |
| // Load allocation top into result and allocation limit into ip. |
| LoadP(result, MemOperand(topaddr)); |
| LoadP(ip, MemOperand(topaddr, kPointerSize)); |
| } else { |
| if (emit_debug_code()) { |
| // Assert that result actually contains top on entry. ip is used |
| // immediately below so this use of ip does not cause difference with |
| // respect to register content between debug and release mode. |
| LoadP(ip, MemOperand(topaddr)); |
| cmp(result, ip); |
| Check(eq, kUnexpectedAllocationTop); |
| } |
| // Load allocation limit into ip. Result already contains allocation top. |
| LoadP(ip, MemOperand(topaddr, limit - top)); |
| } |
| |
| if ((flags & DOUBLE_ALIGNMENT) != 0) { |
| // Align the next allocation. Storing the filler map without checking top is |
| // safe in new-space because the limit of the heap is aligned there. |
| DCHECK((flags & PRETENURE_OLD_POINTER_SPACE) == 0); |
| #if V8_TARGET_ARCH_PPC64 |
| STATIC_ASSERT(kPointerAlignment == kDoubleAlignment); |
| #else |
| STATIC_ASSERT(kPointerAlignment * 2 == kDoubleAlignment); |
| andi(scratch2, result, Operand(kDoubleAlignmentMask)); |
| Label aligned; |
| beq(&aligned, cr0); |
| if ((flags & PRETENURE_OLD_DATA_SPACE) != 0) { |
| cmpl(result, ip); |
| bge(gc_required); |
| } |
| mov(scratch2, Operand(isolate()->factory()->one_pointer_filler_map())); |
| stw(scratch2, MemOperand(result)); |
| addi(result, result, Operand(kDoubleSize / 2)); |
| bind(&aligned); |
| #endif |
| } |
| |
| // Calculate new top and bail out if new space is exhausted. Use result |
| // to calculate the new top. Object size may be in words so a shift is |
| // required to get the number of bytes. |
| sub(r0, ip, result); |
| if ((flags & SIZE_IN_WORDS) != 0) { |
| ShiftLeftImm(scratch2, object_size, Operand(kPointerSizeLog2)); |
| cmp(r0, scratch2); |
| blt(gc_required); |
| add(scratch2, result, scratch2); |
| } else { |
| cmp(r0, object_size); |
| blt(gc_required); |
| add(scratch2, result, object_size); |
| } |
| |
| // Update allocation top. result temporarily holds the new top. |
| if (emit_debug_code()) { |
| andi(r0, scratch2, Operand(kObjectAlignmentMask)); |
| Check(eq, kUnalignedAllocationInNewSpace, cr0); |
| } |
| StoreP(scratch2, MemOperand(topaddr)); |
| |
| // Tag object if requested. |
| if ((flags & TAG_OBJECT) != 0) { |
| addi(result, result, Operand(kHeapObjectTag)); |
| } |
| } |
| |
| |
| void MacroAssembler::UndoAllocationInNewSpace(Register object, |
| Register scratch) { |
| ExternalReference new_space_allocation_top = |
| ExternalReference::new_space_allocation_top_address(isolate()); |
| |
| // Make sure the object has no tag before resetting top. |
| mov(r0, Operand(~kHeapObjectTagMask)); |
| and_(object, object, r0); |
| // was.. and_(object, object, Operand(~kHeapObjectTagMask)); |
| #ifdef DEBUG |
| // Check that the object un-allocated is below the current top. |
| mov(scratch, Operand(new_space_allocation_top)); |
| LoadP(scratch, MemOperand(scratch)); |
| cmp(object, scratch); |
| Check(lt, kUndoAllocationOfNonAllocatedMemory); |
| #endif |
| // Write the address of the object to un-allocate as the current top. |
| mov(scratch, Operand(new_space_allocation_top)); |
| StoreP(object, MemOperand(scratch)); |
| } |
| |
| |
| void MacroAssembler::AllocateTwoByteString(Register result, Register length, |
| Register scratch1, Register scratch2, |
| Register scratch3, |
| Label* gc_required) { |
| // Calculate the number of bytes needed for the characters in the string while |
| // observing object alignment. |
| DCHECK((SeqTwoByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
| slwi(scratch1, length, Operand(1)); // Length in bytes, not chars. |
| addi(scratch1, scratch1, |
| Operand(kObjectAlignmentMask + SeqTwoByteString::kHeaderSize)); |
| mov(r0, Operand(~kObjectAlignmentMask)); |
| and_(scratch1, scratch1, r0); |
| |
| // Allocate two-byte string in new space. |
| Allocate(scratch1, result, scratch2, scratch3, gc_required, TAG_OBJECT); |
| |
| // Set the map, length and hash field. |
| InitializeNewString(result, length, Heap::kStringMapRootIndex, scratch1, |
| scratch2); |
| } |
| |
| |
| void MacroAssembler::AllocateOneByteString(Register result, Register length, |
| Register scratch1, Register scratch2, |
| Register scratch3, |
| Label* gc_required) { |
| // Calculate the number of bytes needed for the characters in the string while |
| // observing object alignment. |
| DCHECK((SeqOneByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
| DCHECK(kCharSize == 1); |
| addi(scratch1, length, |
| Operand(kObjectAlignmentMask + SeqOneByteString::kHeaderSize)); |
| li(r0, Operand(~kObjectAlignmentMask)); |
| and_(scratch1, scratch1, r0); |
| |
| // Allocate one-byte string in new space. |
| Allocate(scratch1, result, scratch2, scratch3, gc_required, TAG_OBJECT); |
| |
| // Set the map, length and hash field. |
| InitializeNewString(result, length, Heap::kOneByteStringMapRootIndex, |
| scratch1, scratch2); |
| } |
| |
| |
| void MacroAssembler::AllocateTwoByteConsString(Register result, Register length, |
| Register scratch1, |
| Register scratch2, |
| Label* gc_required) { |
| Allocate(ConsString::kSize, result, scratch1, scratch2, gc_required, |
| TAG_OBJECT); |
| |
| InitializeNewString(result, length, Heap::kConsStringMapRootIndex, scratch1, |
| scratch2); |
| } |
| |
| |
| void MacroAssembler::AllocateOneByteConsString(Register result, Register length, |
| Register scratch1, |
| Register scratch2, |
| Label* gc_required) { |
| Allocate(ConsString::kSize, result, scratch1, scratch2, gc_required, |
| TAG_OBJECT); |
| |
| InitializeNewString(result, length, Heap::kConsOneByteStringMapRootIndex, |
| scratch1, scratch2); |
| } |
| |
| |
| void MacroAssembler::AllocateTwoByteSlicedString(Register result, |
| Register length, |
| Register scratch1, |
| Register scratch2, |
| Label* gc_required) { |
| Allocate(SlicedString::kSize, result, scratch1, scratch2, gc_required, |
| TAG_OBJECT); |
| |
| InitializeNewString(result, length, Heap::kSlicedStringMapRootIndex, scratch1, |
| scratch2); |
| } |
| |
| |
| void MacroAssembler::AllocateOneByteSlicedString(Register result, |
| Register length, |
| Register scratch1, |
| Register scratch2, |
| Label* gc_required) { |
| Allocate(SlicedString::kSize, result, scratch1, scratch2, gc_required, |
| TAG_OBJECT); |
| |
| InitializeNewString(result, length, Heap::kSlicedOneByteStringMapRootIndex, |
| scratch1, scratch2); |
| } |
| |
| |
| void MacroAssembler::CompareObjectType(Register object, Register map, |
| Register type_reg, InstanceType type) { |
| const Register temp = type_reg.is(no_reg) ? r0 : type_reg; |
| |
| LoadP(map, FieldMemOperand(object, HeapObject::kMapOffset)); |
| CompareInstanceType(map, temp, type); |
| } |
| |
| |
| void MacroAssembler::CheckObjectTypeRange(Register object, Register map, |
| InstanceType min_type, |
| InstanceType max_type, |
| Label* false_label) { |
| STATIC_ASSERT(Map::kInstanceTypeOffset < 4096); |
| STATIC_ASSERT(LAST_TYPE < 256); |
| LoadP(map, FieldMemOperand(object, HeapObject::kMapOffset)); |
| lbz(ip, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| subi(ip, ip, Operand(min_type)); |
| cmpli(ip, Operand(max_type - min_type)); |
| bgt(false_label); |
| } |
| |
| |
| void MacroAssembler::CompareInstanceType(Register map, Register type_reg, |
| InstanceType type) { |
| STATIC_ASSERT(Map::kInstanceTypeOffset < 4096); |
| STATIC_ASSERT(LAST_TYPE < 256); |
| lbz(type_reg, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| cmpi(type_reg, Operand(type)); |
| } |
| |
| |
| void MacroAssembler::CompareRoot(Register obj, Heap::RootListIndex index) { |
| DCHECK(!obj.is(r0)); |
| LoadRoot(r0, index); |
| cmp(obj, r0); |
| } |
| |
| |
| void MacroAssembler::CheckFastElements(Register map, Register scratch, |
| Label* fail) { |
| STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| STATIC_ASSERT(FAST_ELEMENTS == 2); |
| STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3); |
| lbz(scratch, FieldMemOperand(map, Map::kBitField2Offset)); |
| STATIC_ASSERT(Map::kMaximumBitField2FastHoleyElementValue < 0x8000); |
| cmpli(scratch, Operand(Map::kMaximumBitField2FastHoleyElementValue)); |
| bgt(fail); |
| } |
| |
| |
| void MacroAssembler::CheckFastObjectElements(Register map, Register scratch, |
| Label* fail) { |
| STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| STATIC_ASSERT(FAST_ELEMENTS == 2); |
| STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3); |
| lbz(scratch, FieldMemOperand(map, Map::kBitField2Offset)); |
| cmpli(scratch, Operand(Map::kMaximumBitField2FastHoleySmiElementValue)); |
| ble(fail); |
| cmpli(scratch, Operand(Map::kMaximumBitField2FastHoleyElementValue)); |
| bgt(fail); |
| } |
| |
| |
| void MacroAssembler::CheckFastSmiElements(Register map, Register scratch, |
| Label* fail) { |
| STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| lbz(scratch, FieldMemOperand(map, Map::kBitField2Offset)); |
| cmpli(scratch, Operand(Map::kMaximumBitField2FastHoleySmiElementValue)); |
| bgt(fail); |
| } |
| |
| |
| void MacroAssembler::StoreNumberToDoubleElements( |
| Register value_reg, Register key_reg, Register elements_reg, |
| Register scratch1, DoubleRegister double_scratch, Label* fail, |
| int elements_offset) { |
| Label smi_value, store; |
| |
| // Handle smi values specially. |
| JumpIfSmi(value_reg, &smi_value); |
| |
| // Ensure that the object is a heap number |
| CheckMap(value_reg, scratch1, isolate()->factory()->heap_number_map(), fail, |
| DONT_DO_SMI_CHECK); |
| |
| lfd(double_scratch, FieldMemOperand(value_reg, HeapNumber::kValueOffset)); |
| // Force a canonical NaN. |
| CanonicalizeNaN(double_scratch); |
| b(&store); |
| |
| bind(&smi_value); |
| SmiToDouble(double_scratch, value_reg); |
| |
| bind(&store); |
| SmiToDoubleArrayOffset(scratch1, key_reg); |
| add(scratch1, elements_reg, scratch1); |
| stfd(double_scratch, FieldMemOperand(scratch1, FixedDoubleArray::kHeaderSize - |
| elements_offset)); |
| } |
| |
| |
| void MacroAssembler::AddAndCheckForOverflow(Register dst, Register left, |
| Register right, |
| Register overflow_dst, |
| Register scratch) { |
| DCHECK(!dst.is(overflow_dst)); |
| DCHECK(!dst.is(scratch)); |
| DCHECK(!overflow_dst.is(scratch)); |
| DCHECK(!overflow_dst.is(left)); |
| DCHECK(!overflow_dst.is(right)); |
| |
| // C = A+B; C overflows if A/B have same sign and C has diff sign than A |
| if (dst.is(left)) { |
| mr(scratch, left); // Preserve left. |
| add(dst, left, right); // Left is overwritten. |
| xor_(scratch, dst, scratch); // Original left. |
| xor_(overflow_dst, dst, right); |
| } else if (dst.is(right)) { |
| mr(scratch, right); // Preserve right. |
| add(dst, left, right); // Right is overwritten. |
| xor_(scratch, dst, scratch); // Original right. |
| xor_(overflow_dst, dst, left); |
| } else { |
| add(dst, left, right); |
| xor_(overflow_dst, dst, left); |
| xor_(scratch, dst, right); |
| } |
| and_(overflow_dst, scratch, overflow_dst, SetRC); |
| } |
| |
| |
| void MacroAssembler::AddAndCheckForOverflow(Register dst, Register left, |
| intptr_t right, |
| Register overflow_dst, |
| Register scratch) { |
| Register original_left = left; |
| DCHECK(!dst.is(overflow_dst)); |
| DCHECK(!dst.is(scratch)); |
| DCHECK(!overflow_dst.is(scratch)); |
| DCHECK(!overflow_dst.is(left)); |
| |
| // C = A+B; C overflows if A/B have same sign and C has diff sign than A |
| if (dst.is(left)) { |
| // Preserve left. |
| original_left = overflow_dst; |
| mr(original_left, left); |
| } |
| Add(dst, left, right, scratch); |
| xor_(overflow_dst, dst, original_left); |
| if (right >= 0) { |
| and_(overflow_dst, overflow_dst, dst, SetRC); |
| } else { |
| andc(overflow_dst, overflow_dst, dst, SetRC); |
| } |
| } |
| |
| |
| void MacroAssembler::SubAndCheckForOverflow(Register dst, Register left, |
| Register right, |
| Register overflow_dst, |
| Register scratch) { |
| DCHECK(!dst.is(overflow_dst)); |
| DCHECK(!dst.is(scratch)); |
| DCHECK(!overflow_dst.is(scratch)); |
| DCHECK(!overflow_dst.is(left)); |
| DCHECK(!overflow_dst.is(right)); |
| |
| // C = A-B; C overflows if A/B have diff signs and C has diff sign than A |
| if (dst.is(left)) { |
| mr(scratch, left); // Preserve left. |
| sub(dst, left, right); // Left is overwritten. |
| xor_(overflow_dst, dst, scratch); |
| xor_(scratch, scratch, right); |
| and_(overflow_dst, overflow_dst, scratch, SetRC); |
| } else if (dst.is(right)) { |
| mr(scratch, right); // Preserve right. |
| sub(dst, left, right); // Right is overwritten. |
| xor_(overflow_dst, dst, left); |
| xor_(scratch, left, scratch); |
| and_(overflow_dst, overflow_dst, scratch, SetRC); |
| } else { |
| sub(dst, left, right); |
| xor_(overflow_dst, dst, left); |
| xor_(scratch, left, right); |
| and_(overflow_dst, scratch, overflow_dst, SetRC); |
| } |
| } |
| |
| |
| void MacroAssembler::CompareMap(Register obj, Register scratch, Handle<Map> map, |
| Label* early_success) { |
| LoadP(scratch, FieldMemOperand(obj, HeapObject::kMapOffset)); |
| CompareMap(scratch, map, early_success); |
| } |
| |
| |
| void MacroAssembler::CompareMap(Register obj_map, Handle<Map> map, |
| Label* early_success) { |
| mov(r0, Operand(map)); |
| cmp(obj_map, r0); |
| } |
| |
| |
| void MacroAssembler::CheckMap(Register obj, Register scratch, Handle<Map> map, |
| Label* fail, SmiCheckType smi_check_type) { |
| if (smi_check_type == DO_SMI_CHECK) { |
| JumpIfSmi(obj, fail); |
| } |
| |
| Label success; |
| CompareMap(obj, scratch, map, &success); |
| bne(fail); |
| bind(&success); |
| } |
| |
| |
| void MacroAssembler::CheckMap(Register obj, Register scratch, |
| Heap::RootListIndex index, Label* fail, |
| SmiCheckType smi_check_type) { |
| if (smi_check_type == DO_SMI_CHECK) { |
| JumpIfSmi(obj, fail); |
| } |
| LoadP(scratch, FieldMemOperand(obj, HeapObject::kMapOffset)); |
| LoadRoot(r0, index); |
| cmp(scratch, r0); |
| bne(fail); |
| } |
| |
| |
| void MacroAssembler::DispatchMap(Register obj, Register scratch, |
| Handle<Map> map, Handle<Code> success, |
| SmiCheckType smi_check_type) { |
| Label fail; |
| if (smi_check_type == DO_SMI_CHECK) { |
| JumpIfSmi(obj, &fail); |
| } |
| LoadP(scratch, FieldMemOperand(obj, HeapObject::kMapOffset)); |
| mov(r0, Operand(map)); |
| cmp(scratch, r0); |
| bne(&fail); |
| Jump(success, RelocInfo::CODE_TARGET, al); |
| bind(&fail); |
| } |
| |
| |
| void MacroAssembler::TryGetFunctionPrototype(Register function, Register result, |
| Register scratch, Label* miss, |
| bool miss_on_bound_function) { |
| Label non_instance; |
| if (miss_on_bound_function) { |
| // Check that the receiver isn't a smi. |
| JumpIfSmi(function, miss); |
| |
| // Check that the function really is a function. Load map into result reg. |
| CompareObjectType(function, result, scratch, JS_FUNCTION_TYPE); |
| bne(miss); |
| |
| LoadP(scratch, |
| FieldMemOperand(function, JSFunction::kSharedFunctionInfoOffset)); |
| lwz(scratch, |
| FieldMemOperand(scratch, SharedFunctionInfo::kCompilerHintsOffset)); |
| TestBit(scratch, |
| #if V8_TARGET_ARCH_PPC64 |
| SharedFunctionInfo::kBoundFunction, |
| #else |
| SharedFunctionInfo::kBoundFunction + kSmiTagSize, |
| #endif |
| r0); |
| bne(miss, cr0); |
| |
| // Make sure that the function has an instance prototype. |
| lbz(scratch, FieldMemOperand(result, Map::kBitFieldOffset)); |
| andi(r0, scratch, Operand(1 << Map::kHasNonInstancePrototype)); |
| bne(&non_instance, cr0); |
| } |
| |
| // Get the prototype or initial map from the function. |
| LoadP(result, |
| FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| |
| // If the prototype or initial map is the hole, don't return it and |
| // simply miss the cache instead. This will allow us to allocate a |
| // prototype object on-demand in the runtime system. |
| LoadRoot(r0, Heap::kTheHoleValueRootIndex); |
| cmp(result, r0); |
| beq(miss); |
| |
| // If the function does not have an initial map, we're done. |
| Label done; |
| CompareObjectType(result, scratch, scratch, MAP_TYPE); |
| bne(&done); |
| |
| // Get the prototype from the initial map. |
| LoadP(result, FieldMemOperand(result, Map::kPrototypeOffset)); |
| |
| if (miss_on_bound_function) { |
| b(&done); |
| |
| // Non-instance prototype: Fetch prototype from constructor field |
| // in initial map. |
| bind(&non_instance); |
| LoadP(result, FieldMemOperand(result, Map::kConstructorOffset)); |
| } |
| |
| // All done. |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::CallStub(CodeStub* stub, TypeFeedbackId ast_id, |
| Condition cond) { |
| DCHECK(AllowThisStubCall(stub)); // Stub calls are not allowed in some stubs. |
| Call(stub->GetCode(), RelocInfo::CODE_TARGET, ast_id, cond); |
| } |
| |
| |
| void MacroAssembler::TailCallStub(CodeStub* stub, Condition cond) { |
| Jump(stub->GetCode(), RelocInfo::CODE_TARGET, cond); |
| } |
| |
| |
| static int AddressOffset(ExternalReference ref0, ExternalReference ref1) { |
| return ref0.address() - ref1.address(); |
| } |
| |
| |
| void MacroAssembler::CallApiFunctionAndReturn( |
| Register function_address, ExternalReference thunk_ref, int stack_space, |
| MemOperand return_value_operand, MemOperand* context_restore_operand) { |
| ExternalReference next_address = |
| ExternalReference::handle_scope_next_address(isolate()); |
| const int kNextOffset = 0; |
| const int kLimitOffset = AddressOffset( |
| ExternalReference::handle_scope_limit_address(isolate()), next_address); |
| const int kLevelOffset = AddressOffset( |
| ExternalReference::handle_scope_level_address(isolate()), next_address); |
| |
| DCHECK(function_address.is(r4) || function_address.is(r5)); |
| Register scratch = r6; |
| |
| Label profiler_disabled; |
| Label end_profiler_check; |
| mov(scratch, Operand(ExternalReference::is_profiling_address(isolate()))); |
| lbz(scratch, MemOperand(scratch, 0)); |
| cmpi(scratch, Operand::Zero()); |
| beq(&profiler_disabled); |
| |
| // Additional parameter is the address of the actual callback. |
| mov(scratch, Operand(thunk_ref)); |
| jmp(&end_profiler_check); |
| |
| bind(&profiler_disabled); |
| mr(scratch, function_address); |
| bind(&end_profiler_check); |
| |
| // Allocate HandleScope in callee-save registers. |
| // r17 - next_address |
| // r14 - next_address->kNextOffset |
| // r15 - next_address->kLimitOffset |
| // r16 - next_address->kLevelOffset |
| mov(r17, Operand(next_address)); |
| LoadP(r14, MemOperand(r17, kNextOffset)); |
| LoadP(r15, MemOperand(r17, kLimitOffset)); |
| lwz(r16, MemOperand(r17, kLevelOffset)); |
| addi(r16, r16, Operand(1)); |
| stw(r16, MemOperand(r17, kLevelOffset)); |
| |
| if (FLAG_log_timer_events) { |
| FrameScope frame(this, StackFrame::MANUAL); |
| PushSafepointRegisters(); |
| PrepareCallCFunction(1, r3); |
| mov(r3, Operand(ExternalReference::isolate_address(isolate()))); |
| CallCFunction(ExternalReference::log_enter_external_function(isolate()), 1); |
| PopSafepointRegisters(); |
| } |
| |
| // Native call returns to the DirectCEntry stub which redirects to the |
| // return address pushed on stack (could have moved after GC). |
| // DirectCEntry stub itself is generated early and never moves. |
| DirectCEntryStub stub(isolate()); |
| stub.GenerateCall(this, scratch); |
| |
| if (FLAG_log_timer_events) { |
| FrameScope frame(this, StackFrame::MANUAL); |
| PushSafepointRegisters(); |
| PrepareCallCFunction(1, r3); |
| mov(r3, Operand(ExternalReference::isolate_address(isolate()))); |
| CallCFunction(ExternalReference::log_leave_external_function(isolate()), 1); |
| PopSafepointRegisters(); |
| } |
| |
| Label promote_scheduled_exception; |
| Label exception_handled; |
| Label delete_allocated_handles; |
| Label leave_exit_frame; |
| Label return_value_loaded; |
| |
| // load value from ReturnValue |
| LoadP(r3, return_value_operand); |
| bind(&return_value_loaded); |
| // No more valid handles (the result handle was the last one). Restore |
| // previous handle scope. |
| StoreP(r14, MemOperand(r17, kNextOffset)); |
| if (emit_debug_code()) { |
| lwz(r4, MemOperand(r17, kLevelOffset)); |
| cmp(r4, r16); |
| Check(eq, kUnexpectedLevelAfterReturnFromApiCall); |
| } |
| subi(r16, r16, Operand(1)); |
| stw(r16, MemOperand(r17, kLevelOffset)); |
| LoadP(r0, MemOperand(r17, kLimitOffset)); |
| cmp(r15, r0); |
| bne(&delete_allocated_handles); |
| |
| // Check if the function scheduled an exception. |
| bind(&leave_exit_frame); |
| LoadRoot(r14, Heap::kTheHoleValueRootIndex); |
| mov(r15, Operand(ExternalReference::scheduled_exception_address(isolate()))); |
| LoadP(r15, MemOperand(r15)); |
| cmp(r14, r15); |
| bne(&promote_scheduled_exception); |
| bind(&exception_handled); |
| |
| bool restore_context = context_restore_operand != NULL; |
| if (restore_context) { |
| LoadP(cp, *context_restore_operand); |
| } |
| // LeaveExitFrame expects unwind space to be in a register. |
| mov(r14, Operand(stack_space)); |
| LeaveExitFrame(false, r14, !restore_context); |
| blr(); |
| |
| bind(&promote_scheduled_exception); |
| { |
| FrameScope frame(this, StackFrame::INTERNAL); |
| CallExternalReference( |
| ExternalReference(Runtime::kPromoteScheduledException, isolate()), 0); |
| } |
| jmp(&exception_handled); |
| |
| // HandleScope limit has changed. Delete allocated extensions. |
| bind(&delete_allocated_handles); |
| StoreP(r15, MemOperand(r17, kLimitOffset)); |
| mr(r14, r3); |
| PrepareCallCFunction(1, r15); |
| mov(r3, Operand(ExternalReference::isolate_address(isolate()))); |
| CallCFunction(ExternalReference::delete_handle_scope_extensions(isolate()), |
| 1); |
| mr(r3, r14); |
| b(&leave_exit_frame); |
| } |
| |
| |
| bool MacroAssembler::AllowThisStubCall(CodeStub* stub) { |
| return has_frame_ || !stub->SometimesSetsUpAFrame(); |
| } |
| |
| |
| void MacroAssembler::IndexFromHash(Register hash, Register index) { |
| // If the hash field contains an array index pick it out. The assert checks |
| // that the constants for the maximum number of digits for an array index |
| // cached in the hash field and the number of bits reserved for it does not |
| // conflict. |
| DCHECK(TenToThe(String::kMaxCachedArrayIndexLength) < |
| (1 << String::kArrayIndexValueBits)); |
| DecodeFieldToSmi<String::ArrayIndexValueBits>(index, hash); |
| } |
| |
| |
| void MacroAssembler::SmiToDouble(DoubleRegister value, Register smi) { |
| SmiUntag(ip, smi); |
| ConvertIntToDouble(ip, value); |
| } |
| |
| |
| void MacroAssembler::TestDoubleIsInt32(DoubleRegister double_input, |
| Register scratch1, Register scratch2, |
| DoubleRegister double_scratch) { |
| TryDoubleToInt32Exact(scratch1, double_input, scratch2, double_scratch); |
| } |
| |
| |
| void MacroAssembler::TryDoubleToInt32Exact(Register result, |
| DoubleRegister double_input, |
| Register scratch, |
| DoubleRegister double_scratch) { |
| Label done; |
| DCHECK(!double_input.is(double_scratch)); |
| |
| ConvertDoubleToInt64(double_input, |
| #if !V8_TARGET_ARCH_PPC64 |
| scratch, |
| #endif |
| result, double_scratch); |
| |
| #if V8_TARGET_ARCH_PPC64 |
| TestIfInt32(result, scratch, r0); |
| #else |
| TestIfInt32(scratch, result, r0); |
| #endif |
| bne(&done); |
| |
| // convert back and compare |
| fcfid(double_scratch, double_scratch); |
| fcmpu(double_scratch, double_input); |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::TryInt32Floor(Register result, DoubleRegister double_input, |
| Register input_high, Register scratch, |
| DoubleRegister double_scratch, Label* done, |
| Label* exact) { |
| DCHECK(!result.is(input_high)); |
| DCHECK(!double_input.is(double_scratch)); |
| Label exception; |
| |
| MovDoubleHighToInt(input_high, double_input); |
| |
| // Test for NaN/Inf |
| ExtractBitMask(result, input_high, HeapNumber::kExponentMask); |
| cmpli(result, Operand(0x7ff)); |
| beq(&exception); |
| |
| // Convert (rounding to -Inf) |
| ConvertDoubleToInt64(double_input, |
| #if !V8_TARGET_ARCH_PPC64 |
| scratch, |
| #endif |
| result, double_scratch, kRoundToMinusInf); |
| |
| // Test for overflow |
| #if V8_TARGET_ARCH_PPC64 |
| TestIfInt32(result, scratch, r0); |
| #else |
| TestIfInt32(scratch, result, r0); |
| #endif |
| bne(&exception); |
| |
| // Test for exactness |
| fcfid(double_scratch, double_scratch); |
| fcmpu(double_scratch, double_input); |
| beq(exact); |
| b(done); |
| |
| bind(&exception); |
| } |
| |
| |
| void MacroAssembler::TryInlineTruncateDoubleToI(Register result, |
| DoubleRegister double_input, |
| Label* done) { |
| DoubleRegister double_scratch = kScratchDoubleReg; |
| Register scratch = ip; |
| |
| ConvertDoubleToInt64(double_input, |
| #if !V8_TARGET_ARCH_PPC64 |
| scratch, |
| #endif |
| result, double_scratch); |
| |
| // Test for overflow |
| #if V8_TARGET_ARCH_PPC64 |
| TestIfInt32(result, scratch, r0); |
| #else |
| TestIfInt32(scratch, result, r0); |
| #endif |
| beq(done); |
| } |
| |
| |
| void MacroAssembler::TruncateDoubleToI(Register result, |
| DoubleRegister double_input) { |
| Label done; |
| |
| TryInlineTruncateDoubleToI(result, double_input, &done); |
| |
| // If we fell through then inline version didn't succeed - call stub instead. |
| mflr(r0); |
| push(r0); |
| // Put input on stack. |
| stfdu(double_input, MemOperand(sp, -kDoubleSize)); |
| |
| DoubleToIStub stub(isolate(), sp, result, 0, true, true); |
| CallStub(&stub); |
| |
| addi(sp, sp, Operand(kDoubleSize)); |
| pop(r0); |
| mtlr(r0); |
| |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::TruncateHeapNumberToI(Register result, Register object) { |
| Label done; |
| DoubleRegister double_scratch = kScratchDoubleReg; |
| DCHECK(!result.is(object)); |
| |
| lfd(double_scratch, FieldMemOperand(object, HeapNumber::kValueOffset)); |
| TryInlineTruncateDoubleToI(result, double_scratch, &done); |
| |
| // If we fell through then inline version didn't succeed - call stub instead. |
| mflr(r0); |
| push(r0); |
| DoubleToIStub stub(isolate(), object, result, |
| HeapNumber::kValueOffset - kHeapObjectTag, true, true); |
| CallStub(&stub); |
| pop(r0); |
| mtlr(r0); |
| |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::TruncateNumberToI(Register object, Register result, |
| Register heap_number_map, |
| Register scratch1, Label* not_number) { |
| Label done; |
| DCHECK(!result.is(object)); |
| |
| UntagAndJumpIfSmi(result, object, &done); |
| JumpIfNotHeapNumber(object, heap_number_map, scratch1, not_number); |
| TruncateHeapNumberToI(result, object); |
| |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::GetLeastBitsFromSmi(Register dst, Register src, |
| int num_least_bits) { |
| #if V8_TARGET_ARCH_PPC64 |
| rldicl(dst, src, kBitsPerPointer - kSmiShift, |
| kBitsPerPointer - num_least_bits); |
| #else |
| rlwinm(dst, src, kBitsPerPointer - kSmiShift, |
| kBitsPerPointer - num_least_bits, 31); |
| #endif |
| } |
| |
| |
| void MacroAssembler::GetLeastBitsFromInt32(Register dst, Register src, |
| int num_least_bits) { |
| rlwinm(dst, src, 0, 32 - num_least_bits, 31); |
| } |
| |
| |
| void MacroAssembler::CallRuntime(const Runtime::Function* f, int num_arguments, |
| SaveFPRegsMode save_doubles) { |
| // All parameters are on the stack. r3 has the return value after call. |
| |
| // If the expected number of arguments of the runtime function is |
| // constant, we check that the actual number of arguments match the |
| // expectation. |
| CHECK(f->nargs < 0 || f->nargs == num_arguments); |
| |
| // TODO(1236192): Most runtime routines don't need the number of |
| // arguments passed in because it is constant. At some point we |
| // should remove this need and make the runtime routine entry code |
| // smarter. |
| mov(r3, Operand(num_arguments)); |
| mov(r4, Operand(ExternalReference(f, isolate()))); |
| CEntryStub stub(isolate(), |
| #if V8_TARGET_ARCH_PPC64 |
| f->result_size, |
| #else |
| 1, |
| #endif |
| save_doubles); |
| CallStub(&stub); |
| } |
| |
| |
| void MacroAssembler::CallExternalReference(const ExternalReference& ext, |
| int num_arguments) { |
| mov(r3, Operand(num_arguments)); |
| mov(r4, Operand(ext)); |
| |
| CEntryStub stub(isolate(), 1); |
| CallStub(&stub); |
| } |
| |
| |
| void MacroAssembler::TailCallExternalReference(const ExternalReference& ext, |
| int num_arguments, |
| int result_size) { |
| // TODO(1236192): Most runtime routines don't need the number of |
| // arguments passed in because it is constant. At some point we |
| // should remove this need and make the runtime routine entry code |
| // smarter. |
| mov(r3, Operand(num_arguments)); |
| JumpToExternalReference(ext); |
| } |
| |
| |
| void MacroAssembler::TailCallRuntime(Runtime::FunctionId fid, int num_arguments, |
| int result_size) { |
| TailCallExternalReference(ExternalReference(fid, isolate()), num_arguments, |
| result_size); |
| } |
| |
| |
| void MacroAssembler::JumpToExternalReference(const ExternalReference& builtin) { |
| mov(r4, Operand(builtin)); |
| CEntryStub stub(isolate(), 1); |
| Jump(stub.GetCode(), RelocInfo::CODE_TARGET); |
| } |
| |
| |
| void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id, InvokeFlag flag, |
| const CallWrapper& call_wrapper) { |
| // You can't call a builtin without a valid frame. |
| DCHECK(flag == JUMP_FUNCTION || has_frame()); |
| |
| GetBuiltinEntry(ip, id); |
| if (flag == CALL_FUNCTION) { |
| call_wrapper.BeforeCall(CallSize(ip)); |
| CallJSEntry(ip); |
| call_wrapper.AfterCall(); |
| } else { |
| DCHECK(flag == JUMP_FUNCTION); |
| JumpToJSEntry(ip); |
| } |
| } |
| |
| |
| void MacroAssembler::GetBuiltinFunction(Register target, |
| Builtins::JavaScript id) { |
| // Load the builtins object into target register. |
| LoadP(target, |
| MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
| LoadP(target, FieldMemOperand(target, GlobalObject::kBuiltinsOffset)); |
| // Load the JavaScript builtin function from the builtins object. |
| LoadP(target, |
| FieldMemOperand(target, JSBuiltinsObject::OffsetOfFunctionWithId(id)), |
| r0); |
| } |
| |
| |
| void MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) { |
| DCHECK(!target.is(r4)); |
| GetBuiltinFunction(r4, id); |
| // Load the code entry point from the builtins object. |
| LoadP(target, FieldMemOperand(r4, JSFunction::kCodeEntryOffset)); |
| } |
| |
| |
| void MacroAssembler::SetCounter(StatsCounter* counter, int value, |
| Register scratch1, Register scratch2) { |
| if (FLAG_native_code_counters && counter->Enabled()) { |
| mov(scratch1, Operand(value)); |
| mov(scratch2, Operand(ExternalReference(counter))); |
| stw(scratch1, MemOperand(scratch2)); |
| } |
| } |
| |
| |
| void MacroAssembler::IncrementCounter(StatsCounter* counter, int value, |
| Register scratch1, Register scratch2) { |
| DCHECK(value > 0); |
| if (FLAG_native_code_counters && counter->Enabled()) { |
| mov(scratch2, Operand(ExternalReference(counter))); |
| lwz(scratch1, MemOperand(scratch2)); |
| addi(scratch1, scratch1, Operand(value)); |
| stw(scratch1, MemOperand(scratch2)); |
| } |
| } |
| |
| |
| void MacroAssembler::DecrementCounter(StatsCounter* counter, int value, |
| Register scratch1, Register scratch2) { |
| DCHECK(value > 0); |
| if (FLAG_native_code_counters && counter->Enabled()) { |
| mov(scratch2, Operand(ExternalReference(counter))); |
| lwz(scratch1, MemOperand(scratch2)); |
| subi(scratch1, scratch1, Operand(value)); |
| stw(scratch1, MemOperand(scratch2)); |
| } |
| } |
| |
| |
| void MacroAssembler::Assert(Condition cond, BailoutReason reason, |
| CRegister cr) { |
| if (emit_debug_code()) Check(cond, reason, cr); |
| } |
| |
| |
| void MacroAssembler::AssertFastElements(Register elements) { |
| if (emit_debug_code()) { |
| DCHECK(!elements.is(r0)); |
| Label ok; |
| push(elements); |
| LoadP(elements, FieldMemOperand(elements, HeapObject::kMapOffset)); |
| LoadRoot(r0, Heap::kFixedArrayMapRootIndex); |
| cmp(elements, r0); |
| beq(&ok); |
| LoadRoot(r0, Heap::kFixedDoubleArrayMapRootIndex); |
| cmp(elements, r0); |
| beq(&ok); |
| LoadRoot(r0, Heap::kFixedCOWArrayMapRootIndex); |
| cmp(elements, r0); |
| beq(&ok); |
| Abort(kJSObjectWithFastElementsMapHasSlowElements); |
| bind(&ok); |
| pop(elements); |
| } |
| } |
| |
| |
| void MacroAssembler::Check(Condition cond, BailoutReason reason, CRegister cr) { |
| Label L; |
| b(cond, &L, cr); |
| Abort(reason); |
| // will not return here |
| bind(&L); |
| } |
| |
| |
| void MacroAssembler::Abort(BailoutReason reason) { |
| Label abort_start; |
| bind(&abort_start); |
| #ifdef DEBUG |
| const char* msg = GetBailoutReason(reason); |
| if (msg != NULL) { |
| RecordComment("Abort message: "); |
| RecordComment(msg); |
| } |
| |
| if (FLAG_trap_on_abort) { |
| stop(msg); |
| return; |
| } |
| #endif |
| |
| LoadSmiLiteral(r0, Smi::FromInt(reason)); |
| push(r0); |
| // Disable stub call restrictions to always allow calls to abort. |
| if (!has_frame_) { |
| // We don't actually want to generate a pile of code for this, so just |
| // claim there is a stack frame, without generating one. |
| FrameScope scope(this, StackFrame::NONE); |
| CallRuntime(Runtime::kAbort, 1); |
| } else { |
| CallRuntime(Runtime::kAbort, 1); |
| } |
| // will not return here |
| } |
| |
| |
| void MacroAssembler::LoadContext(Register dst, int context_chain_length) { |
| if (context_chain_length > 0) { |
| // Move up the chain of contexts to the context containing the slot. |
| LoadP(dst, MemOperand(cp, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
| for (int i = 1; i < context_chain_length; i++) { |
| LoadP(dst, MemOperand(dst, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
| } |
| } else { |
| // Slot is in the current function context. Move it into the |
| // destination register in case we store into it (the write barrier |
| // cannot be allowed to destroy the context in esi). |
| mr(dst, cp); |
| } |
| } |
| |
| |
| void MacroAssembler::LoadTransitionedArrayMapConditional( |
| ElementsKind expected_kind, ElementsKind transitioned_kind, |
| Register map_in_out, Register scratch, Label* no_map_match) { |
| // Load the global or builtins object from the current context. |
| LoadP(scratch, |
| MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
| LoadP(scratch, FieldMemOperand(scratch, GlobalObject::kNativeContextOffset)); |
| |
| // Check that the function's map is the same as the expected cached map. |
| LoadP(scratch, |
| MemOperand(scratch, Context::SlotOffset(Context::JS_ARRAY_MAPS_INDEX))); |
| size_t offset = expected_kind * kPointerSize + FixedArrayBase::kHeaderSize; |
| LoadP(scratch, FieldMemOperand(scratch, offset)); |
| cmp(map_in_out, scratch); |
| bne(no_map_match); |
| |
| // Use the transitioned cached map. |
| offset = transitioned_kind * kPointerSize + FixedArrayBase::kHeaderSize; |
| LoadP(map_in_out, FieldMemOperand(scratch, offset)); |
| } |
| |
| |
| void MacroAssembler::LoadGlobalFunction(int index, Register function) { |
| // Load the global or builtins object from the current context. |
| LoadP(function, |
| MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
| // Load the native context from the global or builtins object. |
| LoadP(function, |
| FieldMemOperand(function, GlobalObject::kNativeContextOffset)); |
| // Load the function from the native context. |
| LoadP(function, MemOperand(function, Context::SlotOffset(index)), r0); |
| } |
| |
| |
| void MacroAssembler::LoadGlobalFunctionInitialMap(Register function, |
| Register map, |
| Register scratch) { |
| // Load the initial map. The global functions all have initial maps. |
| LoadP(map, |
| FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| if (emit_debug_code()) { |
| Label ok, fail; |
| CheckMap(map, scratch, Heap::kMetaMapRootIndex, &fail, DO_SMI_CHECK); |
| b(&ok); |
| bind(&fail); |
| Abort(kGlobalFunctionsMustHaveInitialMap); |
| bind(&ok); |
| } |
| } |
| |
| |
| void MacroAssembler::JumpIfNotPowerOfTwoOrZero( |
| Register reg, Register scratch, Label* not_power_of_two_or_zero) { |
| subi(scratch, reg, Operand(1)); |
| cmpi(scratch, Operand::Zero()); |
| blt(not_power_of_two_or_zero); |
| and_(r0, scratch, reg, SetRC); |
| bne(not_power_of_two_or_zero, cr0); |
| } |
| |
| |
| void MacroAssembler::JumpIfNotPowerOfTwoOrZeroAndNeg(Register reg, |
| Register scratch, |
| Label* zero_and_neg, |
| Label* not_power_of_two) { |
| subi(scratch, reg, Operand(1)); |
| cmpi(scratch, Operand::Zero()); |
| blt(zero_and_neg); |
| and_(r0, scratch, reg, SetRC); |
| bne(not_power_of_two, cr0); |
| } |
| |
| #if !V8_TARGET_ARCH_PPC64 |
| void MacroAssembler::SmiTagCheckOverflow(Register reg, Register overflow) { |
| DCHECK(!reg.is(overflow)); |
| mr(overflow, reg); // Save original value. |
| SmiTag(reg); |
| xor_(overflow, overflow, reg, SetRC); // Overflow if (value ^ 2 * value) < 0. |
| } |
| |
| |
| void MacroAssembler::SmiTagCheckOverflow(Register dst, Register src, |
| Register overflow) { |
| if (dst.is(src)) { |
| // Fall back to slower case. |
| SmiTagCheckOverflow(dst, overflow); |
| } else { |
| DCHECK(!dst.is(src)); |
| DCHECK(!dst.is(overflow)); |
| DCHECK(!src.is(overflow)); |
| SmiTag(dst, src); |
| xor_(overflow, dst, src, SetRC); // Overflow if (value ^ 2 * value) < 0. |
| } |
| } |
| #endif |
| |
| void MacroAssembler::JumpIfNotBothSmi(Register reg1, Register reg2, |
| Label* on_not_both_smi) { |
| STATIC_ASSERT(kSmiTag == 0); |
| DCHECK_EQ(1, static_cast<int>(kSmiTagMask)); |
| orx(r0, reg1, reg2, LeaveRC); |
| JumpIfNotSmi(r0, on_not_both_smi); |
| } |
| |
| |
| void MacroAssembler::UntagAndJumpIfSmi(Register dst, Register src, |
| Label* smi_case) { |
| STATIC_ASSERT(kSmiTag == 0); |
| STATIC_ASSERT(kSmiTagSize == 1); |
| TestBit(src, 0, r0); |
| SmiUntag(dst, src); |
| beq(smi_case, cr0); |
| } |
| |
| |
| void MacroAssembler::UntagAndJumpIfNotSmi(Register dst, Register src, |
| Label* non_smi_case) { |
| STATIC_ASSERT(kSmiTag == 0); |
| STATIC_ASSERT(kSmiTagSize == 1); |
| TestBit(src, 0, r0); |
| SmiUntag(dst, src); |
| bne(non_smi_case, cr0); |
| } |
| |
| |
| void MacroAssembler::JumpIfEitherSmi(Register reg1, Register reg2, |
| Label* on_either_smi) { |
| STATIC_ASSERT(kSmiTag == 0); |
| JumpIfSmi(reg1, on_either_smi); |
| JumpIfSmi(reg2, on_either_smi); |
| } |
| |
| |
| void MacroAssembler::AssertNotSmi(Register object) { |
| if (emit_debug_code()) { |
| STATIC_ASSERT(kSmiTag == 0); |
| TestIfSmi(object, r0); |
| Check(ne, kOperandIsASmi, cr0); |
| } |
| } |
| |
| |
| void MacroAssembler::AssertSmi(Register object) { |
| if (emit_debug_code()) { |
| STATIC_ASSERT(kSmiTag == 0); |
| TestIfSmi(object, r0); |
| Check(eq, kOperandIsNotSmi, cr0); |
| } |
| } |
| |
| |
| void MacroAssembler::AssertString(Register object) { |
| if (emit_debug_code()) { |
| STATIC_ASSERT(kSmiTag == 0); |
| TestIfSmi(object, r0); |
| Check(ne, kOperandIsASmiAndNotAString, cr0); |
| push(object); |
| LoadP(object, FieldMemOperand(object, HeapObject::kMapOffset)); |
| CompareInstanceType(object, object, FIRST_NONSTRING_TYPE); |
| pop(object); |
| Check(lt, kOperandIsNotAString); |
| } |
| } |
| |
| |
| void MacroAssembler::AssertName(Register object) { |
| if (emit_debug_code()) { |
| STATIC_ASSERT(kSmiTag == 0); |
| TestIfSmi(object, r0); |
| Check(ne, kOperandIsASmiAndNotAName, cr0); |
| push(object); |
| LoadP(object, FieldMemOperand(object, HeapObject::kMapOffset)); |
| CompareInstanceType(object, object, LAST_NAME_TYPE); |
| pop(object); |
| Check(le, kOperandIsNotAName); |
| } |
| } |
| |
| |
| void MacroAssembler::AssertUndefinedOrAllocationSite(Register object, |
| Register scratch) { |
| if (emit_debug_code()) { |
| Label done_checking; |
| AssertNotSmi(object); |
| CompareRoot(object, Heap::kUndefinedValueRootIndex); |
| beq(&done_checking); |
| LoadP(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| CompareRoot(scratch, Heap::kAllocationSiteMapRootIndex); |
| Assert(eq, kExpectedUndefinedOrCell); |
| bind(&done_checking); |
| } |
| } |
| |
| |
| void MacroAssembler::AssertIsRoot(Register reg, Heap::RootListIndex index) { |
| if (emit_debug_code()) { |
| CompareRoot(reg, index); |
| Check(eq, kHeapNumberMapRegisterClobbered); |
| } |
| } |
| |
| |
| void MacroAssembler::JumpIfNotHeapNumber(Register object, |
| Register heap_number_map, |
| Register scratch, |
| Label* on_not_heap_number) { |
| LoadP(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| AssertIsRoot(heap_number_map, Heap::kHeapNumberMapRootIndex); |
| cmp(scratch, heap_number_map); |
| bne(on_not_heap_number); |
| } |
| |
| |
| void MacroAssembler::LookupNumberStringCache(Register object, Register result, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| Label* not_found) { |
| // Use of registers. Register result is used as a temporary. |
| Register number_string_cache = result; |
| Register mask = scratch3; |
| |
| // Load the number string cache. |
| LoadRoot(number_string_cache, Heap::kNumberStringCacheRootIndex); |
| |
| // Make the hash mask from the length of the number string cache. It |
| // contains two elements (number and string) for each cache entry. |
| LoadP(mask, FieldMemOperand(number_string_cache, FixedArray::kLengthOffset)); |
| // Divide length by two (length is a smi). |
| ShiftRightArithImm(mask, mask, kSmiTagSize + kSmiShiftSize + 1); |
| subi(mask, mask, Operand(1)); // Make mask. |
| |
| // Calculate the entry in the number string cache. The hash value in the |
| // number string cache for smis is just the smi value, and the hash for |
| // doubles is the xor of the upper and lower words. See |
| // Heap::GetNumberStringCache. |
| Label is_smi; |
| Label load_result_from_cache; |
| JumpIfSmi(object, &is_smi); |
| CheckMap(object, scratch1, Heap::kHeapNumberMapRootIndex, not_found, |
| DONT_DO_SMI_CHECK); |
| |
| STATIC_ASSERT(8 == kDoubleSize); |
| lwz(scratch1, FieldMemOperand(object, HeapNumber::kExponentOffset)); |
| lwz(scratch2, FieldMemOperand(object, HeapNumber::kMantissaOffset)); |
| xor_(scratch1, scratch1, scratch2); |
| and_(scratch1, scratch1, mask); |
| |
| // Calculate address of entry in string cache: each entry consists |
| // of two pointer sized fields. |
| ShiftLeftImm(scratch1, scratch1, Operand(kPointerSizeLog2 + 1)); |
| add(scratch1, number_string_cache, scratch1); |
| |
| Register probe = mask; |
| LoadP(probe, FieldMemOperand(scratch1, FixedArray::kHeaderSize)); |
| JumpIfSmi(probe, not_found); |
| lfd(d0, FieldMemOperand(object, HeapNumber::kValueOffset)); |
| lfd(d1, FieldMemOperand(probe, HeapNumber::kValueOffset)); |
| fcmpu(d0, d1); |
| bne(not_found); // The cache did not contain this value. |
| b(&load_result_from_cache); |
| |
| bind(&is_smi); |
| Register scratch = scratch1; |
| SmiUntag(scratch, object); |
| and_(scratch, mask, scratch); |
| // Calculate address of entry in string cache: each entry consists |
| // of two pointer sized fields. |
| ShiftLeftImm(scratch, scratch, Operand(kPointerSizeLog2 + 1)); |
| add(scratch, number_string_cache, scratch); |
| |
| // Check if the entry is the smi we are looking for. |
| LoadP(probe, FieldMemOperand(scratch, FixedArray::kHeaderSize)); |
| cmp(object, probe); |
| bne(not_found); |
| |
| // Get the result from the cache. |
| bind(&load_result_from_cache); |
| LoadP(result, |
| FieldMemOperand(scratch, FixedArray::kHeaderSize + kPointerSize)); |
| IncrementCounter(isolate()->counters()->number_to_string_native(), 1, |
| scratch1, scratch2); |
| } |
| |
| |
| void MacroAssembler::JumpIfNonSmisNotBothSequentialOneByteStrings( |
| Register first, Register second, Register scratch1, Register scratch2, |
| Label* failure) { |
| // Test that both first and second are sequential one-byte strings. |
| // Assume that they are non-smis. |
| LoadP(scratch1, FieldMemOperand(first, HeapObject::kMapOffset)); |
| LoadP(scratch2, FieldMemOperand(second, HeapObject::kMapOffset)); |
| lbz(scratch1, FieldMemOperand(scratch1, Map::kInstanceTypeOffset)); |
| lbz(scratch2, FieldMemOperand(scratch2, Map::kInstanceTypeOffset)); |
| |
| JumpIfBothInstanceTypesAreNotSequentialOneByte(scratch1, scratch2, scratch1, |
| scratch2, failure); |
| } |
| |
| void MacroAssembler::JumpIfNotBothSequentialOneByteStrings(Register first, |
| Register second, |
| Register scratch1, |
| Register scratch2, |
| Label* failure) { |
| // Check that neither is a smi. |
| and_(scratch1, first, second); |
| JumpIfSmi(scratch1, failure); |
| JumpIfNonSmisNotBothSequentialOneByteStrings(first, second, scratch1, |
| scratch2, failure); |
| } |
| |
| |
| void MacroAssembler::JumpIfNotUniqueNameInstanceType(Register reg, |
| Label* not_unique_name) { |
| STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
| Label succeed; |
| andi(r0, reg, Operand(kIsNotStringMask | kIsNotInternalizedMask)); |
| beq(&succeed, cr0); |
| cmpi(reg, Operand(SYMBOL_TYPE)); |
| bne(not_unique_name); |
| |
| bind(&succeed); |
| } |
| |
| |
| // Allocates a heap number or jumps to the need_gc label if the young space |
| // is full and a scavenge is needed. |
| void MacroAssembler::AllocateHeapNumber(Register result, Register scratch1, |
| Register scratch2, |
| Register heap_number_map, |
| Label* gc_required, |
| TaggingMode tagging_mode, |
| MutableMode mode) { |
| // Allocate an object in the heap for the heap number and tag it as a heap |
| // object. |
| Allocate(HeapNumber::kSize, result, scratch1, scratch2, gc_required, |
| tagging_mode == TAG_RESULT ? TAG_OBJECT : NO_ALLOCATION_FLAGS); |
| |
| Heap::RootListIndex map_index = mode == MUTABLE |
| ? Heap::kMutableHeapNumberMapRootIndex |
| : Heap::kHeapNumberMapRootIndex; |
| AssertIsRoot(heap_number_map, map_index); |
| |
| // Store heap number map in the allocated object. |
| if (tagging_mode == TAG_RESULT) { |
| StoreP(heap_number_map, FieldMemOperand(result, HeapObject::kMapOffset), |
| r0); |
| } else { |
| StoreP(heap_number_map, MemOperand(result, HeapObject::kMapOffset)); |
| } |
| } |
| |
| |
| void MacroAssembler::AllocateHeapNumberWithValue( |
| Register result, DoubleRegister value, Register scratch1, Register scratch2, |
| Register heap_number_map, Label* gc_required) { |
| AllocateHeapNumber(result, scratch1, scratch2, heap_number_map, gc_required); |
| stfd(value, FieldMemOperand(result, HeapNumber::kValueOffset)); |
| } |
| |
| |
| // Copies a fixed number of fields of heap objects from src to dst. |
| void MacroAssembler::CopyFields(Register dst, Register src, RegList temps, |
| int field_count) { |
| // At least one bit set in the first 15 registers. |
| DCHECK((temps & ((1 << 15) - 1)) != 0); |
| DCHECK((temps & dst.bit()) == 0); |
| DCHECK((temps & src.bit()) == 0); |
| // Primitive implementation using only one temporary register. |
| |
| Register tmp = no_reg; |
| // Find a temp register in temps list. |
| for (int i = 0; i < 15; i++) { |
| if ((temps & (1 << i)) != 0) { |
| tmp.set_code(i); |
| break; |
| } |
| } |
| DCHECK(!tmp.is(no_reg)); |
| |
| for (int i = 0; i < field_count; i++) { |
| LoadP(tmp, FieldMemOperand(src, i * kPointerSize), r0); |
| StoreP(tmp, FieldMemOperand(dst, i * kPointerSize), r0); |
| } |
| } |
| |
| |
| void MacroAssembler::CopyBytes(Register src, Register dst, Register length, |
| Register scratch) { |
| Label align_loop, aligned, word_loop, byte_loop, byte_loop_1, done; |
| |
| DCHECK(!scratch.is(r0)); |
| |
| cmpi(length, Operand::Zero()); |
| beq(&done); |
| |
| // Check src alignment and length to see whether word_loop is possible |
| andi(scratch, src, Operand(kPointerSize - 1)); |
| beq(&aligned, cr0); |
| subfic(scratch, scratch, Operand(kPointerSize * 2)); |
| cmp(length, scratch); |
| blt(&byte_loop); |
| |
| // Align src before copying in word size chunks. |
| subi(scratch, scratch, Operand(kPointerSize)); |
| mtctr(scratch); |
| bind(&align_loop); |
| lbz(scratch, MemOperand(src)); |
| addi(src, src, Operand(1)); |
| subi(length, length, Operand(1)); |
| stb(scratch, MemOperand(dst)); |
| addi(dst, dst, Operand(1)); |
| bdnz(&align_loop); |
| |
| bind(&aligned); |
| |
| // Copy bytes in word size chunks. |
| if (emit_debug_code()) { |
| andi(r0, src, Operand(kPointerSize - 1)); |
| Assert(eq, kExpectingAlignmentForCopyBytes, cr0); |
| } |
| |
| ShiftRightImm(scratch, length, Operand(kPointerSizeLog2)); |
| cmpi(scratch, Operand::Zero()); |
| beq(&byte_loop); |
| |
| mtctr(scratch); |
| bind(&word_loop); |
| LoadP(scratch, MemOperand(src)); |
| addi(src, src, Operand(kPointerSize)); |
| subi(length, length, Operand(kPointerSize)); |
| if (CpuFeatures::IsSupported(UNALIGNED_ACCESSES)) { |
| // currently false for PPC - but possible future opt |
| StoreP(scratch, MemOperand(dst)); |
| addi(dst, dst, Operand(kPointerSize)); |
| } else { |
| #if V8_TARGET_LITTLE_ENDIAN |
| stb(scratch, MemOperand(dst, 0)); |
| ShiftRightImm(scratch, scratch, Operand(8)); |
| stb(scratch, MemOperand(dst, 1)); |
| ShiftRightImm(scratch, scratch, Operand(8)); |
| stb(scratch, MemOperand(dst, 2)); |
| ShiftRightImm(scratch, scratch, Operand(8)); |
| stb(scratch, MemOperand(dst, 3)); |
| #if V8_TARGET_ARCH_PPC64 |
| ShiftRightImm(scratch, scratch, Operand(8)); |
| stb(scratch, MemOperand(dst, 4)); |
| ShiftRightImm(scratch, scratch, Operand(8)); |
| stb(scratch, MemOperand(dst, 5)); |
| ShiftRightImm(scratch, scratch, Operand(8)); |
| stb(scratch, MemOperand(dst, 6)); |
| ShiftRightImm(scratch, scratch, Operand(8)); |
| stb(scratch, MemOperand(dst, 7)); |
| #endif |
| #else |
| #if V8_TARGET_ARCH_PPC64 |
| stb(scratch, MemOperand(dst, 7)); |
| ShiftRightImm(scratch, scratch, Operand(8)); |
| stb(scratch, MemOperand(dst, 6)); |
| ShiftRightImm(scratch, scratch, Operand(8)); |
| stb(scratch, MemOperand(dst, 5)); |
| ShiftRightImm(scratch, scratch, Operand(8)); |
| stb(scratch, MemOperand(dst, 4)); |
| ShiftRightImm(scratch, scratch, Operand(8)); |
| #endif |
| stb(scratch, MemOperand(dst, 3)); |
| ShiftRightImm(scratch, scratch, Operand(8)); |
| stb(scratch, MemOperand(dst, 2)); |
| ShiftRightImm(scratch, scratch, Operand(8)); |
| stb(scratch, MemOperand(dst, 1)); |
| ShiftRightImm(scratch, scratch, Operand(8)); |
| stb(scratch, MemOperand(dst, 0)); |
| #endif |
| addi(dst, dst, Operand(kPointerSize)); |
| } |
| bdnz(&word_loop); |
| |
| // Copy the last bytes if any left. |
| cmpi(length, Operand::Zero()); |
| beq(&done); |
| |
| bind(&byte_loop); |
| mtctr(length); |
| bind(&byte_loop_1); |
| lbz(scratch, MemOperand(src)); |
| addi(src, src, Operand(1)); |
| stb(scratch, MemOperand(dst)); |
| addi(dst, dst, Operand(1)); |
| bdnz(&byte_loop_1); |
| |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::InitializeNFieldsWithFiller(Register start_offset, |
| Register count, |
| Register filler) { |
| Label loop; |
| mtctr(count); |
| bind(&loop); |
| StoreP(filler, MemOperand(start_offset)); |
| addi(start_offset, start_offset, Operand(kPointerSize)); |
| bdnz(&loop); |
| } |
| |
| void MacroAssembler::InitializeFieldsWithFiller(Register start_offset, |
| Register end_offset, |
| Register filler) { |
| Label done; |
| sub(r0, end_offset, start_offset, LeaveOE, SetRC); |
| beq(&done, cr0); |
| ShiftRightImm(r0, r0, Operand(kPointerSizeLog2)); |
| InitializeNFieldsWithFiller(start_offset, r0, filler); |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::SaveFPRegs(Register location, int first, int count) { |
| DCHECK(count > 0); |
| int cur = first; |
| subi(location, location, Operand(count * kDoubleSize)); |
| for (int i = 0; i < count; i++) { |
| DoubleRegister reg = DoubleRegister::from_code(cur++); |
| stfd(reg, MemOperand(location, i * kDoubleSize)); |
| } |
| } |
| |
| |
| void MacroAssembler::RestoreFPRegs(Register location, int first, int count) { |
| DCHECK(count > 0); |
| int cur = first + count - 1; |
| for (int i = count - 1; i >= 0; i--) { |
| DoubleRegister reg = DoubleRegister::from_code(cur--); |
| lfd(reg, MemOperand(location, i * kDoubleSize)); |
| } |
| addi(location, location, Operand(count * kDoubleSize)); |
| } |
| |
| |
| void MacroAssembler::JumpIfBothInstanceTypesAreNotSequentialOneByte( |
| Register first, Register second, Register scratch1, Register scratch2, |
| Label* failure) { |
| const int kFlatOneByteStringMask = |
| kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask; |
| const int kFlatOneByteStringTag = |
| kStringTag | kOneByteStringTag | kSeqStringTag; |
| andi(scratch1, first, Operand(kFlatOneByteStringMask)); |
| andi(scratch2, second, Operand(kFlatOneByteStringMask)); |
| cmpi(scratch1, Operand(kFlatOneByteStringTag)); |
| bne(failure); |
| cmpi(scratch2, Operand(kFlatOneByteStringTag)); |
| bne(failure); |
| } |
| |
| |
| void MacroAssembler::JumpIfInstanceTypeIsNotSequentialOneByte(Register type, |
| Register scratch, |
| Label* failure) { |
| const int kFlatOneByteStringMask = |
| kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask; |
| const int kFlatOneByteStringTag = |
| kStringTag | kOneByteStringTag | kSeqStringTag; |
| andi(scratch, type, Operand(kFlatOneByteStringMask)); |
| cmpi(scratch, Operand(kFlatOneByteStringTag)); |
| bne(failure); |
| } |
| |
| static const int kRegisterPassedArguments = 8; |
| |
| |
| int MacroAssembler::CalculateStackPassedWords(int num_reg_arguments, |
| int num_double_arguments) { |
| int stack_passed_words = 0; |
| if (num_double_arguments > DoubleRegister::kNumRegisters) { |
| stack_passed_words += |
| 2 * (num_double_arguments - DoubleRegister::kNumRegisters); |
| } |
| // Up to 8 simple arguments are passed in registers r3..r10. |
| if (num_reg_arguments > kRegisterPassedArguments) { |
| stack_passed_words += num_reg_arguments - kRegisterPassedArguments; |
| } |
| return stack_passed_words; |
| } |
| |
| |
| void MacroAssembler::EmitSeqStringSetCharCheck(Register string, Register index, |
| Register value, |
| uint32_t encoding_mask) { |
| Label is_object; |
| TestIfSmi(string, r0); |
| Check(ne, kNonObject, cr0); |
| |
| LoadP(ip, FieldMemOperand(string, HeapObject::kMapOffset)); |
| lbz(ip, FieldMemOperand(ip, Map::kInstanceTypeOffset)); |
| |
| andi(ip, ip, Operand(kStringRepresentationMask | kStringEncodingMask)); |
| cmpi(ip, Operand(encoding_mask)); |
| Check(eq, kUnexpectedStringType); |
| |
| // The index is assumed to be untagged coming in, tag it to compare with the |
| // string length without using a temp register, it is restored at the end of |
| // this function. |
| #if !V8_TARGET_ARCH_PPC64 |
| Label index_tag_ok, index_tag_bad; |
| JumpIfNotSmiCandidate(index, r0, &index_tag_bad); |
| #endif |
| SmiTag(index, index); |
| #if !V8_TARGET_ARCH_PPC64 |
| b(&index_tag_ok); |
| bind(&index_tag_bad); |
| Abort(kIndexIsTooLarge); |
| bind(&index_tag_ok); |
| #endif |
| |
| LoadP(ip, FieldMemOperand(string, String::kLengthOffset)); |
| cmp(index, ip); |
| Check(lt, kIndexIsTooLarge); |
| |
| DCHECK(Smi::FromInt(0) == 0); |
| cmpi(index, Operand::Zero()); |
| Check(ge, kIndexIsNegative); |
| |
| SmiUntag(index, index); |
| } |
| |
| |
| void MacroAssembler::PrepareCallCFunction(int num_reg_arguments, |
| int num_double_arguments, |
| Register scratch) { |
| int frame_alignment = ActivationFrameAlignment(); |
| int stack_passed_arguments = |
| CalculateStackPassedWords(num_reg_arguments, num_double_arguments); |
| int stack_space = kNumRequiredStackFrameSlots; |
| |
| if (frame_alignment > kPointerSize) { |
| // Make stack end at alignment and make room for stack arguments |
| // -- preserving original value of sp. |
| mr(scratch, sp); |
| addi(sp, sp, Operand(-(stack_passed_arguments + 1) * kPointerSize)); |
| DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
| ClearRightImm(sp, sp, Operand(WhichPowerOf2(frame_alignment))); |
| StoreP(scratch, MemOperand(sp, stack_passed_arguments * kPointerSize)); |
| } else { |
| // Make room for stack arguments |
| stack_space += stack_passed_arguments; |
| } |
| |
| // Allocate frame with required slots to make ABI work. |
| li(r0, Operand::Zero()); |
| StorePU(r0, MemOperand(sp, -stack_space * kPointerSize)); |
| } |
| |
| |
| void MacroAssembler::PrepareCallCFunction(int num_reg_arguments, |
| Register scratch) { |
| PrepareCallCFunction(num_reg_arguments, 0, scratch); |
| } |
| |
| |
| void MacroAssembler::MovToFloatParameter(DoubleRegister src) { Move(d1, src); } |
| |
| |
| void MacroAssembler::MovToFloatResult(DoubleRegister src) { Move(d1, src); } |
| |
| |
| void MacroAssembler::MovToFloatParameters(DoubleRegister src1, |
| DoubleRegister src2) { |
| if (src2.is(d1)) { |
| DCHECK(!src1.is(d2)); |
| Move(d2, src2); |
| Move(d1, src1); |
| } else { |
| Move(d1, src1); |
| Move(d2, src2); |
| } |
| } |
| |
| |
| void MacroAssembler::CallCFunction(ExternalReference function, |
| int num_reg_arguments, |
| int num_double_arguments) { |
| mov(ip, Operand(function)); |
| CallCFunctionHelper(ip, num_reg_arguments, num_double_arguments); |
| } |
| |
| |
| void MacroAssembler::CallCFunction(Register function, int num_reg_arguments, |
| int num_double_arguments) { |
| CallCFunctionHelper(function, num_reg_arguments, num_double_arguments); |
| } |
| |
| |
| void MacroAssembler::CallCFunction(ExternalReference function, |
| int num_arguments) { |
| CallCFunction(function, num_arguments, 0); |
| } |
| |
| |
| void MacroAssembler::CallCFunction(Register function, int num_arguments) { |
| CallCFunction(function, num_arguments, 0); |
| } |
| |
| |
| void MacroAssembler::CallCFunctionHelper(Register function, |
| int num_reg_arguments, |
| int num_double_arguments) { |
| DCHECK(has_frame()); |
| // Just call directly. The function called cannot cause a GC, or |
| // allow preemption, so the return address in the link register |
| // stays correct. |
| #if ABI_USES_FUNCTION_DESCRIPTORS && !defined(USE_SIMULATOR) |
| // AIX uses a function descriptor. When calling C code be aware |
| // of this descriptor and pick up values from it |
| LoadP(ToRegister(ABI_TOC_REGISTER), MemOperand(function, kPointerSize)); |
| LoadP(ip, MemOperand(function, 0)); |
| Register dest = ip; |
| #elif ABI_TOC_ADDRESSABILITY_VIA_IP |
| Move(ip, function); |
| Register dest = ip; |
| #else |
| Register dest = function; |
| #endif |
| |
| Call(dest); |
| |
| // Remove frame bought in PrepareCallCFunction |
| int stack_passed_arguments = |
| CalculateStackPassedWords(num_reg_arguments, num_double_arguments); |
| int stack_space = kNumRequiredStackFrameSlots + stack_passed_arguments; |
| if (ActivationFrameAlignment() > kPointerSize) { |
| LoadP(sp, MemOperand(sp, stack_space * kPointerSize)); |
| } else { |
| addi(sp, sp, Operand(stack_space * kPointerSize)); |
| } |
| } |
| |
| |
| void MacroAssembler::FlushICache(Register address, size_t size, |
| Register scratch) { |
| if (CpuFeatures::IsSupported(INSTR_AND_DATA_CACHE_COHERENCY)) { |
| sync(); |
| icbi(r0, address); |
| isync(); |
| return; |
| } |
| |
| Label done; |
| |
| dcbf(r0, address); |
| sync(); |
| icbi(r0, address); |
| isync(); |
| |
| // This code handles ranges which cross a single cacheline boundary. |
| // scratch is last cacheline which intersects range. |
| const int kCacheLineSizeLog2 = WhichPowerOf2(CpuFeatures::cache_line_size()); |
| |
| DCHECK(size > 0 && size <= (size_t)(1 << kCacheLineSizeLog2)); |
| addi(scratch, address, Operand(size - 1)); |
| ClearRightImm(scratch, scratch, Operand(kCacheLineSizeLog2)); |
| cmpl(scratch, address); |
| ble(&done); |
| |
| dcbf(r0, scratch); |
| sync(); |
| icbi(r0, scratch); |
| isync(); |
| |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::SetRelocatedValue(Register location, Register scratch, |
| Register new_value) { |
| lwz(scratch, MemOperand(location)); |
| |
| #if V8_OOL_CONSTANT_POOL |
| if (emit_debug_code()) { |
| // Check that the instruction sequence is a load from the constant pool |
| #if V8_TARGET_ARCH_PPC64 |
| And(scratch, scratch, Operand(kOpcodeMask | (0x1f * B16))); |
| Cmpi(scratch, Operand(ADDI), r0); |
| Check(eq, kTheInstructionShouldBeALi); |
| lwz(scratch, MemOperand(location, kInstrSize)); |
| #endif |
| ExtractBitMask(scratch, scratch, 0x1f * B16); |
| cmpi(scratch, Operand(kConstantPoolRegister.code())); |
| Check(eq, kTheInstructionToPatchShouldBeALoadFromConstantPool); |
| // Scratch was clobbered. Restore it. |
| lwz(scratch, MemOperand(location)); |
| } |
| // Get the address of the constant and patch it. |
| andi(scratch, scratch, Operand(kImm16Mask)); |
| StorePX(new_value, MemOperand(kConstantPoolRegister, scratch)); |
| #else |
| // This code assumes a FIXED_SEQUENCE for lis/ori |
| |
| // At this point scratch is a lis instruction. |
| if (emit_debug_code()) { |
| And(scratch, scratch, Operand(kOpcodeMask | (0x1f * B16))); |
| Cmpi(scratch, Operand(ADDIS), r0); |
| Check(eq, kTheInstructionToPatchShouldBeALis); |
| lwz(scratch, MemOperand(location)); |
| } |
| |
| // insert new high word into lis instruction |
| #if V8_TARGET_ARCH_PPC64 |
| srdi(ip, new_value, Operand(32)); |
| rlwimi(scratch, ip, 16, 16, 31); |
| #else |
| rlwimi(scratch, new_value, 16, 16, 31); |
| #endif |
| |
| stw(scratch, MemOperand(location)); |
| |
| lwz(scratch, MemOperand(location, kInstrSize)); |
| // scratch is now ori. |
| if (emit_debug_code()) { |
| And(scratch, scratch, Operand(kOpcodeMask)); |
| Cmpi(scratch, Operand(ORI), r0); |
| Check(eq, kTheInstructionShouldBeAnOri); |
| lwz(scratch, MemOperand(location, kInstrSize)); |
| } |
| |
| // insert new low word into ori instruction |
| #if V8_TARGET_ARCH_PPC64 |
| rlwimi(scratch, ip, 0, 16, 31); |
| #else |
| rlwimi(scratch, new_value, 0, 16, 31); |
| #endif |
| stw(scratch, MemOperand(location, kInstrSize)); |
| |
| #if V8_TARGET_ARCH_PPC64 |
| if (emit_debug_code()) { |
| lwz(scratch, MemOperand(location, 2 * kInstrSize)); |
| // scratch is now sldi. |
| And(scratch, scratch, Operand(kOpcodeMask | kExt5OpcodeMask)); |
| Cmpi(scratch, Operand(EXT5 | RLDICR), r0); |
| Check(eq, kTheInstructionShouldBeASldi); |
| } |
| |
| lwz(scratch, MemOperand(location, 3 * kInstrSize)); |
| // scratch is now ori. |
| if (emit_debug_code()) { |
| And(scratch, scratch, Operand(kOpcodeMask)); |
| Cmpi(scratch, Operand(ORIS), r0); |
| Check(eq, kTheInstructionShouldBeAnOris); |
| lwz(scratch, MemOperand(location, 3 * kInstrSize)); |
| } |
| |
| rlwimi(scratch, new_value, 16, 16, 31); |
| stw(scratch, MemOperand(location, 3 * kInstrSize)); |
| |
| lwz(scratch, MemOperand(location, 4 * kInstrSize)); |
| // scratch is now ori. |
| if (emit_debug_code()) { |
| And(scratch, scratch, Operand(kOpcodeMask)); |
| Cmpi(scratch, Operand(ORI), r0); |
| Check(eq, kTheInstructionShouldBeAnOri); |
| lwz(scratch, MemOperand(location, 4 * kInstrSize)); |
| } |
| rlwimi(scratch, new_value, 0, 16, 31); |
| stw(scratch, MemOperand(location, 4 * kInstrSize)); |
| #endif |
| |
| // Update the I-cache so the new lis and addic can be executed. |
| #if V8_TARGET_ARCH_PPC64 |
| FlushICache(location, 5 * kInstrSize, scratch); |
| #else |
| FlushICache(location, 2 * kInstrSize, scratch); |
| #endif |
| #endif |
| } |
| |
| |
| void MacroAssembler::GetRelocatedValue(Register location, Register result, |
| Register scratch) { |
| lwz(result, MemOperand(location)); |
| |
| #if V8_OOL_CONSTANT_POOL |
| if (emit_debug_code()) { |
| // Check that the instruction sequence is a load from the constant pool |
| #if V8_TARGET_ARCH_PPC64 |
| And(result, result, Operand(kOpcodeMask | (0x1f * B16))); |
| Cmpi(result, Operand(ADDI), r0); |
| Check(eq, kTheInstructionShouldBeALi); |
| lwz(result, MemOperand(location, kInstrSize)); |
| #endif |
| ExtractBitMask(result, result, 0x1f * B16); |
| cmpi(result, Operand(kConstantPoolRegister.code())); |
| Check(eq, kTheInstructionToPatchShouldBeALoadFromConstantPool); |
| lwz(result, MemOperand(location)); |
| } |
| // Get the address of the constant and retrieve it. |
| andi(result, result, Operand(kImm16Mask)); |
| LoadPX(result, MemOperand(kConstantPoolRegister, result)); |
| #else |
| // This code assumes a FIXED_SEQUENCE for lis/ori |
| if (emit_debug_code()) { |
| And(result, result, Operand(kOpcodeMask | (0x1f * B16))); |
| Cmpi(result, Operand(ADDIS), r0); |
| Check(eq, kTheInstructionShouldBeALis); |
| lwz(result, MemOperand(location)); |
| } |
| |
| // result now holds a lis instruction. Extract the immediate. |
| slwi(result, result, Operand(16)); |
| |
| lwz(scratch, MemOperand(location, kInstrSize)); |
| if (emit_debug_code()) { |
| And(scratch, scratch, Operand(kOpcodeMask)); |
| Cmpi(scratch, Operand(ORI), r0); |
| Check(eq, kTheInstructionShouldBeAnOri); |
| lwz(scratch, MemOperand(location, kInstrSize)); |
| } |
| // Copy the low 16bits from ori instruction into result |
| rlwimi(result, scratch, 0, 16, 31); |
| |
| #if V8_TARGET_ARCH_PPC64 |
| if (emit_debug_code()) { |
| lwz(scratch, MemOperand(location, 2 * kInstrSize)); |
| // scratch is now sldi. |
| And(scratch, scratch, Operand(kOpcodeMask | kExt5OpcodeMask)); |
| Cmpi(scratch, Operand(EXT5 | RLDICR), r0); |
| Check(eq, kTheInstructionShouldBeASldi); |
| } |
| |
| lwz(scratch, MemOperand(location, 3 * kInstrSize)); |
| // scratch is now ori. |
| if (emit_debug_code()) { |
| And(scratch, scratch, Operand(kOpcodeMask)); |
| Cmpi(scratch, Operand(ORIS), r0); |
| Check(eq, kTheInstructionShouldBeAnOris); |
| lwz(scratch, MemOperand(location, 3 * kInstrSize)); |
| } |
| sldi(result, result, Operand(16)); |
| rldimi(result, scratch, 0, 48); |
| |
| lwz(scratch, MemOperand(location, 4 * kInstrSize)); |
| // scratch is now ori. |
| if (emit_debug_code()) { |
| And(scratch, scratch, Operand(kOpcodeMask)); |
| Cmpi(scratch, Operand(ORI), r0); |
| Check(eq, kTheInstructionShouldBeAnOri); |
| lwz(scratch, MemOperand(location, 4 * kInstrSize)); |
| } |
| sldi(result, result, Operand(16)); |
| rldimi(result, scratch, 0, 48); |
| #endif |
| #endif |
| } |
| |
| |
| void MacroAssembler::CheckPageFlag( |
| Register object, |
| Register scratch, // scratch may be same register as object |
| int mask, Condition cc, Label* condition_met) { |
| DCHECK(cc == ne || cc == eq); |
| ClearRightImm(scratch, object, Operand(kPageSizeBits)); |
| LoadP(scratch, MemOperand(scratch, MemoryChunk::kFlagsOffset)); |
| |
| And(r0, scratch, Operand(mask), SetRC); |
| |
| if (cc == ne) { |
| bne(condition_met, cr0); |
| } |
| if (cc == eq) { |
| beq(condition_met, cr0); |
| } |
| } |
| |
| |
| void MacroAssembler::CheckMapDeprecated(Handle<Map> map, Register scratch, |
| Label* if_deprecated) { |
| if (map->CanBeDeprecated()) { |
| mov(scratch, Operand(map)); |
| lwz(scratch, FieldMemOperand(scratch, Map::kBitField3Offset)); |
| ExtractBitMask(scratch, scratch, Map::Deprecated::kMask, SetRC); |
| bne(if_deprecated, cr0); |
| } |
| } |
| |
| |
| void MacroAssembler::JumpIfBlack(Register object, Register scratch0, |
| Register scratch1, Label* on_black) { |
| HasColor(object, scratch0, scratch1, on_black, 1, 0); // kBlackBitPattern. |
| DCHECK(strcmp(Marking::kBlackBitPattern, "10") == 0); |
| } |
| |
| |
| void MacroAssembler::HasColor(Register object, Register bitmap_scratch, |
| Register mask_scratch, Label* has_color, |
| int first_bit, int second_bit) { |
| DCHECK(!AreAliased(object, bitmap_scratch, mask_scratch, no_reg)); |
| |
| GetMarkBits(object, bitmap_scratch, mask_scratch); |
| |
| Label other_color, word_boundary; |
| lwz(ip, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| // Test the first bit |
| and_(r0, ip, mask_scratch, SetRC); |
| b(first_bit == 1 ? eq : ne, &other_color, cr0); |
| // Shift left 1 |
| // May need to load the next cell |
| slwi(mask_scratch, mask_scratch, Operand(1), SetRC); |
| beq(&word_boundary, cr0); |
| // Test the second bit |
| and_(r0, ip, mask_scratch, SetRC); |
| b(second_bit == 1 ? ne : eq, has_color, cr0); |
| b(&other_color); |
| |
| bind(&word_boundary); |
| lwz(ip, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize + kIntSize)); |
| andi(r0, ip, Operand(1)); |
| b(second_bit == 1 ? ne : eq, has_color, cr0); |
| bind(&other_color); |
| } |
| |
| |
| // Detect some, but not all, common pointer-free objects. This is used by the |
| // incremental write barrier which doesn't care about oddballs (they are always |
| // marked black immediately so this code is not hit). |
| void MacroAssembler::JumpIfDataObject(Register value, Register scratch, |
| Label* not_data_object) { |
| Label is_data_object; |
| LoadP(scratch, FieldMemOperand(value, HeapObject::kMapOffset)); |
| CompareRoot(scratch, Heap::kHeapNumberMapRootIndex); |
| beq(&is_data_object); |
| DCHECK(kIsIndirectStringTag == 1 && kIsIndirectStringMask == 1); |
| DCHECK(kNotStringTag == 0x80 && kIsNotStringMask == 0x80); |
| // If it's a string and it's not a cons string then it's an object containing |
| // no GC pointers. |
| lbz(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| STATIC_ASSERT((kIsIndirectStringMask | kIsNotStringMask) == 0x81); |
| andi(scratch, scratch, Operand(kIsIndirectStringMask | kIsNotStringMask)); |
| bne(not_data_object, cr0); |
| bind(&is_data_object); |
| } |
| |
| |
| void MacroAssembler::GetMarkBits(Register addr_reg, Register bitmap_reg, |
| Register mask_reg) { |
| DCHECK(!AreAliased(addr_reg, bitmap_reg, mask_reg, no_reg)); |
| DCHECK((~Page::kPageAlignmentMask & 0xffff) == 0); |
| lis(r0, Operand((~Page::kPageAlignmentMask >> 16))); |
| and_(bitmap_reg, addr_reg, r0); |
| const int kLowBits = kPointerSizeLog2 + Bitmap::kBitsPerCellLog2; |
| ExtractBitRange(mask_reg, addr_reg, kLowBits - 1, kPointerSizeLog2); |
| ExtractBitRange(ip, addr_reg, kPageSizeBits - 1, kLowBits); |
| ShiftLeftImm(ip, ip, Operand(Bitmap::kBytesPerCellLog2)); |
| add(bitmap_reg, bitmap_reg, ip); |
| li(ip, Operand(1)); |
| slw(mask_reg, ip, mask_reg); |
| } |
| |
| |
| void MacroAssembler::EnsureNotWhite(Register value, Register bitmap_scratch, |
| Register mask_scratch, |
| Register load_scratch, |
| Label* value_is_white_and_not_data) { |
| DCHECK(!AreAliased(value, bitmap_scratch, mask_scratch, ip)); |
| GetMarkBits(value, bitmap_scratch, mask_scratch); |
| |
| // If the value is black or grey we don't need to do anything. |
| DCHECK(strcmp(Marking::kWhiteBitPattern, "00") == 0); |
| DCHECK(strcmp(Marking::kBlackBitPattern, "10") == 0); |
| DCHECK(strcmp(Marking::kGreyBitPattern, "11") == 0); |
| DCHECK(strcmp(Marking::kImpossibleBitPattern, "01") == 0); |
| |
| Label done; |
| |
| // Since both black and grey have a 1 in the first position and white does |
| // not have a 1 there we only need to check one bit. |
| lwz(load_scratch, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| and_(r0, mask_scratch, load_scratch, SetRC); |
| bne(&done, cr0); |
| |
| if (emit_debug_code()) { |
| // Check for impossible bit pattern. |
| Label ok; |
| // LSL may overflow, making the check conservative. |
| slwi(r0, mask_scratch, Operand(1)); |
| and_(r0, load_scratch, r0, SetRC); |
| beq(&ok, cr0); |
| stop("Impossible marking bit pattern"); |
| bind(&ok); |
| } |
| |
| // Value is white. We check whether it is data that doesn't need scanning. |
| // Currently only checks for HeapNumber and non-cons strings. |
| Register map = load_scratch; // Holds map while checking type. |
| Register length = load_scratch; // Holds length of object after testing type. |
| Label is_data_object, maybe_string_object, is_string_object, is_encoded; |
| #if V8_TARGET_ARCH_PPC64 |
| Label length_computed; |
| #endif |
| |
| |
| // Check for heap-number |
| LoadP(map, FieldMemOperand(value, HeapObject::kMapOffset)); |
| CompareRoot(map, Heap::kHeapNumberMapRootIndex); |
| bne(&maybe_string_object); |
| li(length, Operand(HeapNumber::kSize)); |
| b(&is_data_object); |
| bind(&maybe_string_object); |
| |
| // Check for strings. |
| DCHECK(kIsIndirectStringTag == 1 && kIsIndirectStringMask == 1); |
| DCHECK(kNotStringTag == 0x80 && kIsNotStringMask == 0x80); |
| // If it's a string and it's not a cons string then it's an object containing |
| // no GC pointers. |
| Register instance_type = load_scratch; |
| lbz(instance_type, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| andi(r0, instance_type, Operand(kIsIndirectStringMask | kIsNotStringMask)); |
| bne(value_is_white_and_not_data, cr0); |
| // It's a non-indirect (non-cons and non-slice) string. |
| // If it's external, the length is just ExternalString::kSize. |
| // Otherwise it's String::kHeaderSize + string->length() * (1 or 2). |
| // External strings are the only ones with the kExternalStringTag bit |
| // set. |
| DCHECK_EQ(0, kSeqStringTag & kExternalStringTag); |
| DCHECK_EQ(0, kConsStringTag & kExternalStringTag); |
| andi(r0, instance_type, Operand(kExternalStringTag)); |
| beq(&is_string_object, cr0); |
| li(length, Operand(ExternalString::kSize)); |
| b(&is_data_object); |
| bind(&is_string_object); |
| |
| // Sequential string, either Latin1 or UC16. |
| // For Latin1 (char-size of 1) we untag the smi to get the length. |
| // For UC16 (char-size of 2): |
| // - (32-bit) we just leave the smi tag in place, thereby getting |
| // the length multiplied by 2. |
| // - (64-bit) we compute the offset in the 2-byte array |
| DCHECK(kOneByteStringTag == 4 && kStringEncodingMask == 4); |
| LoadP(ip, FieldMemOperand(value, String::kLengthOffset)); |
| andi(r0, instance_type, Operand(kStringEncodingMask)); |
| beq(&is_encoded, cr0); |
| SmiUntag(ip); |
| #if V8_TARGET_ARCH_PPC64 |
| b(&length_computed); |
| #endif |
| bind(&is_encoded); |
| #if V8_TARGET_ARCH_PPC64 |
| SmiToShortArrayOffset(ip, ip); |
| bind(&length_computed); |
| #else |
| DCHECK(kSmiShift == 1); |
| #endif |
| addi(length, ip, Operand(SeqString::kHeaderSize + kObjectAlignmentMask)); |
| li(r0, Operand(~kObjectAlignmentMask)); |
| and_(length, length, r0); |
| |
| bind(&is_data_object); |
| // Value is a data object, and it is white. Mark it black. Since we know |
| // that the object is white we can make it black by flipping one bit. |
| lwz(ip, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| orx(ip, ip, mask_scratch); |
| stw(ip, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| |
| mov(ip, Operand(~Page::kPageAlignmentMask)); |
| and_(bitmap_scratch, bitmap_scratch, ip); |
| lwz(ip, MemOperand(bitmap_scratch, MemoryChunk::kLiveBytesOffset)); |
| add(ip, ip, length); |
| stw(ip, MemOperand(bitmap_scratch, MemoryChunk::kLiveBytesOffset)); |
| |
| bind(&done); |
| } |
| |
| |
| // Saturate a value into 8-bit unsigned integer |
| // if input_value < 0, output_value is 0 |
| // if input_value > 255, output_value is 255 |
| // otherwise output_value is the input_value |
| void MacroAssembler::ClampUint8(Register output_reg, Register input_reg) { |
| Label done, negative_label, overflow_label; |
| int satval = (1 << 8) - 1; |
| |
| cmpi(input_reg, Operand::Zero()); |
| blt(&negative_label); |
| |
| cmpi(input_reg, Operand(satval)); |
| bgt(&overflow_label); |
| if (!output_reg.is(input_reg)) { |
| mr(output_reg, input_reg); |
| } |
| b(&done); |
| |
| bind(&negative_label); |
| li(output_reg, Operand::Zero()); // set to 0 if negative |
| b(&done); |
| |
| |
| bind(&overflow_label); // set to satval if > satval |
| li(output_reg, Operand(satval)); |
| |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::SetRoundingMode(FPRoundingMode RN) { mtfsfi(7, RN); } |
| |
| |
| void MacroAssembler::ResetRoundingMode() { |
| mtfsfi(7, kRoundToNearest); // reset (default is kRoundToNearest) |
| } |
| |
| |
| void MacroAssembler::ClampDoubleToUint8(Register result_reg, |
| DoubleRegister input_reg, |
| DoubleRegister double_scratch) { |
| Label above_zero; |
| Label done; |
| Label in_bounds; |
| |
| LoadDoubleLiteral(double_scratch, 0.0, result_reg); |
| fcmpu(input_reg, double_scratch); |
| bgt(&above_zero); |
| |
| // Double value is less than zero, NaN or Inf, return 0. |
| LoadIntLiteral(result_reg, 0); |
| b(&done); |
| |
| // Double value is >= 255, return 255. |
| bind(&above_zero); |
| LoadDoubleLiteral(double_scratch, 255.0, result_reg); |
| fcmpu(input_reg, double_scratch); |
| ble(&in_bounds); |
| LoadIntLiteral(result_reg, 255); |
| b(&done); |
| |
| // In 0-255 range, round and truncate. |
| bind(&in_bounds); |
| |
| // round to nearest (default rounding mode) |
| fctiw(double_scratch, input_reg); |
| MovDoubleLowToInt(result_reg, double_scratch); |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::LoadInstanceDescriptors(Register map, |
| Register descriptors) { |
| LoadP(descriptors, FieldMemOperand(map, Map::kDescriptorsOffset)); |
| } |
| |
| |
| void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) { |
| lwz(dst, FieldMemOperand(map, Map::kBitField3Offset)); |
| DecodeField<Map::NumberOfOwnDescriptorsBits>(dst); |
| } |
| |
| |
| void MacroAssembler::EnumLength(Register dst, Register map) { |
| STATIC_ASSERT(Map::EnumLengthBits::kShift == 0); |
| lwz(dst, FieldMemOperand(map, Map::kBitField3Offset)); |
| ExtractBitMask(dst, dst, Map::EnumLengthBits::kMask); |
| SmiTag(dst); |
| } |
| |
| |
| void MacroAssembler::CheckEnumCache(Register null_value, Label* call_runtime) { |
| Register empty_fixed_array_value = r9; |
| LoadRoot(empty_fixed_array_value, Heap::kEmptyFixedArrayRootIndex); |
| Label next, start; |
| mr(r5, r3); |
| |
| // Check if the enum length field is properly initialized, indicating that |
| // there is an enum cache. |
| LoadP(r4, FieldMemOperand(r5, HeapObject::kMapOffset)); |
| |
| EnumLength(r6, r4); |
| CmpSmiLiteral(r6, Smi::FromInt(kInvalidEnumCacheSentinel), r0); |
| beq(call_runtime); |
| |
| b(&start); |
| |
| bind(&next); |
| LoadP(r4, FieldMemOperand(r5, HeapObject::kMapOffset)); |
| |
| // For all objects but the receiver, check that the cache is empty. |
| EnumLength(r6, r4); |
| CmpSmiLiteral(r6, Smi::FromInt(0), r0); |
| bne(call_runtime); |
| |
| bind(&start); |
| |
| // Check that there are no elements. Register r5 contains the current JS |
| // object we've reached through the prototype chain. |
| Label no_elements; |
| LoadP(r5, FieldMemOperand(r5, JSObject::kElementsOffset)); |
| cmp(r5, empty_fixed_array_value); |
| beq(&no_elements); |
| |
| // Second chance, the object may be using the empty slow element dictionary. |
| CompareRoot(r5, Heap::kEmptySlowElementDictionaryRootIndex); |
| bne(call_runtime); |
| |
| bind(&no_elements); |
| LoadP(r5, FieldMemOperand(r4, Map::kPrototypeOffset)); |
| cmp(r5, null_value); |
| bne(&next); |
| } |
| |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // |
| // New MacroAssembler Interfaces added for PPC |
| // |
| //////////////////////////////////////////////////////////////////////////////// |
| void MacroAssembler::LoadIntLiteral(Register dst, int value) { |
| mov(dst, Operand(value)); |
| } |
| |
| |
| void MacroAssembler::LoadSmiLiteral(Register dst, Smi* smi) { |
| mov(dst, Operand(smi)); |
| } |
| |
| |
| void MacroAssembler::LoadDoubleLiteral(DoubleRegister result, double value, |
| Register scratch) { |
| #if V8_OOL_CONSTANT_POOL |
| // TODO(mbrandy): enable extended constant pool usage for doubles. |
| // See ARM commit e27ab337 for a reference. |
| if (is_ool_constant_pool_available() && !is_constant_pool_full()) { |
| RelocInfo rinfo(pc_, value); |
| ConstantPoolAddEntry(rinfo); |
| #if V8_TARGET_ARCH_PPC64 |
| // We use 2 instruction sequence here for consistency with mov. |
| li(scratch, Operand::Zero()); |
| lfdx(result, MemOperand(kConstantPoolRegister, scratch)); |
| #else |
| lfd(result, MemOperand(kConstantPoolRegister, 0)); |
| #endif |
| return; |
| } |
| #endif |
| |
| // avoid gcc strict aliasing error using union cast |
| union { |
| double dval; |
| #if V8_TARGET_ARCH_PPC64 |
| intptr_t ival; |
| #else |
| intptr_t ival[2]; |
| #endif |
| } litVal; |
| |
| litVal.dval = value; |
| |
| #if V8_TARGET_ARCH_PPC64 |
| if (CpuFeatures::IsSupported(FPR_GPR_MOV)) { |
| mov(scratch, Operand(litVal.ival)); |
| mtfprd(result, scratch); |
| return; |
| } |
| #endif |
| |
| addi(sp, sp, Operand(-kDoubleSize)); |
| #if V8_TARGET_ARCH_PPC64 |
| mov(scratch, Operand(litVal.ival)); |
| std(scratch, MemOperand(sp)); |
| #else |
| LoadIntLiteral(scratch, litVal.ival[0]); |
| stw(scratch, MemOperand(sp, 0)); |
| LoadIntLiteral(scratch, litVal.ival[1]); |
| stw(scratch, MemOperand(sp, 4)); |
| #endif |
| nop(GROUP_ENDING_NOP); // LHS/RAW optimization |
| lfd(result, MemOperand(sp, 0)); |
| addi(sp, sp, Operand(kDoubleSize)); |
| } |
| |
| |
| void MacroAssembler::MovIntToDouble(DoubleRegister dst, Register src, |
| Register scratch) { |
| // sign-extend src to 64-bit |
| #if V8_TARGET_ARCH_PPC64 |
| if (CpuFeatures::IsSupported(FPR_GPR_MOV)) { |
| mtfprwa(dst, src); |
| return; |
| } |
| #endif |
| |
| DCHECK(!src.is(scratch)); |
| subi(sp, sp, Operand(kDoubleSize)); |
| #if V8_TARGET_ARCH_PPC64 |
| extsw(scratch, src); |
| std(scratch, MemOperand(sp, 0)); |
| #else |
| srawi(scratch, src, 31); |
| stw(scratch, MemOperand(sp, Register::kExponentOffset)); |
| stw(src, MemOperand(sp, Register::kMantissaOffset)); |
| #endif |
| nop(GROUP_ENDING_NOP); // LHS/RAW optimization |
| lfd(dst, MemOperand(sp, 0)); |
| addi(sp, sp, Operand(kDoubleSize)); |
| } |
| |
| |
| void MacroAssembler::MovUnsignedIntToDouble(DoubleRegister dst, Register src, |
| Register scratch) { |
| // zero-extend src to 64-bit |
| #if V8_TARGET_ARCH_PPC64 |
| if (CpuFeatures::IsSupported(FPR_GPR_MOV)) { |
| mtfprwz(dst, src); |
| return; |
| } |
| #endif |
| |
| DCHECK(!src.is(scratch)); |
| subi(sp, sp, Operand(kDoubleSize)); |
| #if V8_TARGET_ARCH_PPC64 |
| clrldi(scratch, src, Operand(32)); |
| std(scratch, MemOperand(sp, 0)); |
| #else |
| li(scratch, Operand::Zero()); |
| stw(scratch, MemOperand(sp, Register::kExponentOffset)); |
| stw(src, MemOperand(sp, Register::kMantissaOffset)); |
| #endif |
| nop(GROUP_ENDING_NOP); // LHS/RAW optimization |
| lfd(dst, MemOperand(sp, 0)); |
| addi(sp, sp, Operand(kDoubleSize)); |
| } |
| |
| |
| void MacroAssembler::MovInt64ToDouble(DoubleRegister dst, |
| #if !V8_TARGET_ARCH_PPC64 |
| Register src_hi, |
| #endif |
| Register src) { |
| #if V8_TARGET_ARCH_PPC64 |
| if (CpuFeatures::IsSupported(FPR_GPR_MOV)) { |
| mtfprd(dst, src); |
| return; |
| } |
| #endif |
| |
| subi(sp, sp, Operand(kDoubleSize)); |
| #if V8_TARGET_ARCH_PPC64 |
| std(src, MemOperand(sp, 0)); |
| #else |
| stw(src_hi, MemOperand(sp, Register::kExponentOffset)); |
| stw(src, MemOperand(sp, Register::kMantissaOffset)); |
| #endif |
| nop(GROUP_ENDING_NOP); // LHS/RAW optimization |
| lfd(dst, MemOperand(sp, 0)); |
| addi(sp, sp, Operand(kDoubleSize)); |
| } |
| |
| |
| #if V8_TARGET_ARCH_PPC64 |
| void MacroAssembler::MovInt64ComponentsToDouble(DoubleRegister dst, |
| Register src_hi, |
| Register src_lo, |
| Register scratch) { |
| if (CpuFeatures::IsSupported(FPR_GPR_MOV)) { |
| sldi(scratch, src_hi, Operand(32)); |
| rldimi(scratch, src_lo, 0, 32); |
| mtfprd(dst, scratch); |
| return; |
| } |
| |
| subi(sp, sp, Operand(kDoubleSize)); |
| stw(src_hi, MemOperand(sp, Register::kExponentOffset)); |
| stw(src_lo, MemOperand(sp, Register::kMantissaOffset)); |
| nop(GROUP_ENDING_NOP); // LHS/RAW optimization |
| lfd(dst, MemOperand(sp)); |
| addi(sp, sp, Operand(kDoubleSize)); |
| } |
| #endif |
| |
| |
| void MacroAssembler::MovDoubleLowToInt(Register dst, DoubleRegister src) { |
| #if V8_TARGET_ARCH_PPC64 |
| if (CpuFeatures::IsSupported(FPR_GPR_MOV)) { |
| mffprwz(dst, src); |
| return; |
| } |
| #endif |
| |
| subi(sp, sp, Operand(kDoubleSize)); |
| stfd(src, MemOperand(sp)); |
| nop(GROUP_ENDING_NOP); // LHS/RAW optimization |
| lwz(dst, MemOperand(sp, Register::kMantissaOffset)); |
| addi(sp, sp, Operand(kDoubleSize)); |
| } |
| |
| |
| void MacroAssembler::MovDoubleHighToInt(Register dst, DoubleRegister src) { |
| #if V8_TARGET_ARCH_PPC64 |
| if (CpuFeatures::IsSupported(FPR_GPR_MOV)) { |
| mffprd(dst, src); |
| srdi(dst, dst, Operand(32)); |
| return; |
| } |
| #endif |
| |
| subi(sp, sp, Operand(kDoubleSize)); |
| stfd(src, MemOperand(sp)); |
| nop(GROUP_ENDING_NOP); // LHS/RAW optimization |
| lwz(dst, MemOperand(sp, Register::kExponentOffset)); |
| addi(sp, sp, Operand(kDoubleSize)); |
| } |
| |
| |
| void MacroAssembler::MovDoubleToInt64( |
| #if !V8_TARGET_ARCH_PPC64 |
| Register dst_hi, |
| #endif |
| Register dst, DoubleRegister src) { |
| #if V8_TARGET_ARCH_PPC64 |
| if (CpuFeatures::IsSupported(FPR_GPR_MOV)) { |
| mffprd(dst, src); |
| return; |
| } |
| #endif |
| |
| subi(sp, sp, Operand(kDoubleSize)); |
| stfd(src, MemOperand(sp)); |
| nop(GROUP_ENDING_NOP); // LHS/RAW optimization |
| #if V8_TARGET_ARCH_PPC64 |
| ld(dst, MemOperand(sp, 0)); |
| #else |
| lwz(dst_hi, MemOperand(sp, Register::kExponentOffset)); |
| lwz(dst, MemOperand(sp, Register::kMantissaOffset)); |
| #endif |
| addi(sp, sp, Operand(kDoubleSize)); |
| } |
| |
| |
| void MacroAssembler::Add(Register dst, Register src, intptr_t value, |
| Register scratch) { |
| if (is_int16(value)) { |
| addi(dst, src, Operand(value)); |
| } else { |
| mov(scratch, Operand(value)); |
| add(dst, src, scratch); |
| } |
| } |
| |
| |
| void MacroAssembler::Cmpi(Register src1, const Operand& src2, Register scratch, |
| CRegister cr) { |
| intptr_t value = src2.immediate(); |
| if (is_int16(value)) { |
| cmpi(src1, src2, cr); |
| } else { |
| mov(scratch, src2); |
| cmp(src1, scratch, cr); |
| } |
| } |
| |
| |
| void MacroAssembler::Cmpli(Register src1, const Operand& src2, Register scratch, |
| CRegister cr) { |
| intptr_t value = src2.immediate(); |
| if (is_uint16(value)) { |
| cmpli(src1, src2, cr); |
| } else { |
| mov(scratch, src2); |
| cmpl(src1, scratch, cr); |
| } |
| } |
| |
| |
| void MacroAssembler::Cmpwi(Register src1, const Operand& src2, Register scratch, |
| CRegister cr) { |
| intptr_t value = src2.immediate(); |
| if (is_int16(value)) { |
| cmpwi(src1, src2, cr); |
| } else { |
| mov(scratch, src2); |
| cmpw(src1, scratch, cr); |
| } |
| } |
| |
| |
| void MacroAssembler::Cmplwi(Register src1, const Operand& src2, |
| Register scratch, CRegister cr) { |
| intptr_t value = src2.immediate(); |
| if (is_uint16(value)) { |
| cmplwi(src1, src2, cr); |
| } else { |
| mov(scratch, src2); |
| cmplw(src1, scratch, cr); |
| } |
| } |
| |
| |
| void MacroAssembler::And(Register ra, Register rs, const Operand& rb, |
| RCBit rc) { |
| if (rb.is_reg()) { |
| and_(ra, rs, rb.rm(), rc); |
| } else { |
| if (is_uint16(rb.imm_) && RelocInfo::IsNone(rb.rmode_) && rc == SetRC) { |
| andi(ra, rs, rb); |
| } else { |
| // mov handles the relocation. |
| DCHECK(!rs.is(r0)); |
| mov(r0, rb); |
| and_(ra, rs, r0, rc); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Or(Register ra, Register rs, const Operand& rb, RCBit rc) { |
| if (rb.is_reg()) { |
| orx(ra, rs, rb.rm(), rc); |
| } else { |
| if (is_uint16(rb.imm_) && RelocInfo::IsNone(rb.rmode_) && rc == LeaveRC) { |
| ori(ra, rs, rb); |
| } else { |
| // mov handles the relocation. |
| DCHECK(!rs.is(r0)); |
| mov(r0, rb); |
| orx(ra, rs, r0, rc); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Xor(Register ra, Register rs, const Operand& rb, |
| RCBit rc) { |
| if (rb.is_reg()) { |
| xor_(ra, rs, rb.rm(), rc); |
| } else { |
| if (is_uint16(rb.imm_) && RelocInfo::IsNone(rb.rmode_) && rc == LeaveRC) { |
| xori(ra, rs, rb); |
| } else { |
| // mov handles the relocation. |
| DCHECK(!rs.is(r0)); |
| mov(r0, rb); |
| xor_(ra, rs, r0, rc); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::CmpSmiLiteral(Register src1, Smi* smi, Register scratch, |
| CRegister cr) { |
| #if V8_TARGET_ARCH_PPC64 |
| LoadSmiLiteral(scratch, smi); |
| cmp(src1, scratch, cr); |
| #else |
| Cmpi(src1, Operand(smi), scratch, cr); |
| #endif |
| } |
| |
| |
| void MacroAssembler::CmplSmiLiteral(Register src1, Smi* smi, Register scratch, |
| CRegister cr) { |
| #if V8_TARGET_ARCH_PPC64 |
| LoadSmiLiteral(scratch, smi); |
| cmpl(src1, scratch, cr); |
| #else |
| Cmpli(src1, Operand(smi), scratch, cr); |
| #endif |
| } |
| |
| |
| void MacroAssembler::AddSmiLiteral(Register dst, Register src, Smi* smi, |
| Register scratch) { |
| #if V8_TARGET_ARCH_PPC64 |
| LoadSmiLiteral(scratch, smi); |
| add(dst, src, scratch); |
| #else |
| Add(dst, src, reinterpret_cast<intptr_t>(smi), scratch); |
| #endif |
| } |
| |
| |
| void MacroAssembler::SubSmiLiteral(Register dst, Register src, Smi* smi, |
| Register scratch) { |
| #if V8_TARGET_ARCH_PPC64 |
| LoadSmiLiteral(scratch, smi); |
| sub(dst, src, scratch); |
| #else |
| Add(dst, src, -(reinterpret_cast<intptr_t>(smi)), scratch); |
| #endif |
| } |
| |
| |
| void MacroAssembler::AndSmiLiteral(Register dst, Register src, Smi* smi, |
| Register scratch, RCBit rc) { |
| #if V8_TARGET_ARCH_PPC64 |
| LoadSmiLiteral(scratch, smi); |
| and_(dst, src, scratch, rc); |
| #else |
| And(dst, src, Operand(smi), rc); |
| #endif |
| } |
| |
| |
| // Load a "pointer" sized value from the memory location |
| void MacroAssembler::LoadP(Register dst, const MemOperand& mem, |
| Register scratch) { |
| int offset = mem.offset(); |
| |
| if (!scratch.is(no_reg) && !is_int16(offset)) { |
| /* cannot use d-form */ |
| LoadIntLiteral(scratch, offset); |
| #if V8_TARGET_ARCH_PPC64 |
| ldx(dst, MemOperand(mem.ra(), scratch)); |
| #else |
| lwzx(dst, MemOperand(mem.ra(), scratch)); |
| #endif |
| } else { |
| #if V8_TARGET_ARCH_PPC64 |
| int misaligned = (offset & 3); |
| if (misaligned) { |
| // adjust base to conform to offset alignment requirements |
| // Todo: enhance to use scratch if dst is unsuitable |
| DCHECK(!dst.is(r0)); |
| addi(dst, mem.ra(), Operand((offset & 3) - 4)); |
| ld(dst, MemOperand(dst, (offset & ~3) + 4)); |
| } else { |
| ld(dst, mem); |
| } |
| #else |
| lwz(dst, mem); |
| #endif |
| } |
| } |
| |
| |
| // Store a "pointer" sized value to the memory location |
| void MacroAssembler::StoreP(Register src, const MemOperand& mem, |
| Register scratch) { |
| int offset = mem.offset(); |
| |
| if (!scratch.is(no_reg) && !is_int16(offset)) { |
| /* cannot use d-form */ |
| LoadIntLiteral(scratch, offset); |
| #if V8_TARGET_ARCH_PPC64 |
| stdx(src, MemOperand(mem.ra(), scratch)); |
| #else |
| stwx(src, MemOperand(mem.ra(), scratch)); |
| #endif |
| } else { |
| #if V8_TARGET_ARCH_PPC64 |
| int misaligned = (offset & 3); |
| if (misaligned) { |
| // adjust base to conform to offset alignment requirements |
| // a suitable scratch is required here |
| DCHECK(!scratch.is(no_reg)); |
| if (scratch.is(r0)) { |
| LoadIntLiteral(scratch, offset); |
| stdx(src, MemOperand(mem.ra(), scratch)); |
| } else { |
| addi(scratch, mem.ra(), Operand((offset & 3) - 4)); |
| std(src, MemOperand(scratch, (offset & ~3) + 4)); |
| } |
| } else { |
| std(src, mem); |
| } |
| #else |
| stw(src, mem); |
| #endif |
| } |
| } |
| |
| void MacroAssembler::LoadWordArith(Register dst, const MemOperand& mem, |
| Register scratch) { |
| int offset = mem.offset(); |
| |
| if (!scratch.is(no_reg) && !is_int16(offset)) { |
| /* cannot use d-form */ |
| LoadIntLiteral(scratch, offset); |
| #if V8_TARGET_ARCH_PPC64 |
| // lwax(dst, MemOperand(mem.ra(), scratch)); |
| DCHECK(0); // lwax not yet implemented |
| #else |
| lwzx(dst, MemOperand(mem.ra(), scratch)); |
| #endif |
| } else { |
| #if V8_TARGET_ARCH_PPC64 |
| int misaligned = (offset & 3); |
| if (misaligned) { |
| // adjust base to conform to offset alignment requirements |
| // Todo: enhance to use scratch if dst is unsuitable |
| DCHECK(!dst.is(r0)); |
| addi(dst, mem.ra(), Operand((offset & 3) - 4)); |
| lwa(dst, MemOperand(dst, (offset & ~3) + 4)); |
| } else { |
| lwa(dst, mem); |
| } |
| #else |
| lwz(dst, mem); |
| #endif |
| } |
| } |
| |
| |
| // Variable length depending on whether offset fits into immediate field |
| // MemOperand currently only supports d-form |
| void MacroAssembler::LoadWord(Register dst, const MemOperand& mem, |
| Register scratch) { |
| Register base = mem.ra(); |
| int offset = mem.offset(); |
| |
| if (!is_int16(offset)) { |
| LoadIntLiteral(scratch, offset); |
| lwzx(dst, MemOperand(base, scratch)); |
| } else { |
| lwz(dst, mem); |
| } |
| } |
| |
| |
| // Variable length depending on whether offset fits into immediate field |
| // MemOperand current only supports d-form |
| void MacroAssembler::StoreWord(Register src, const MemOperand& mem, |
| Register scratch) { |
| Register base = mem.ra(); |
| int offset = mem.offset(); |
| |
| if (!is_int16(offset)) { |
| LoadIntLiteral(scratch, offset); |
| stwx(src, MemOperand(base, scratch)); |
| } else { |
| stw(src, mem); |
| } |
| } |
| |
| |
| // Variable length depending on whether offset fits into immediate field |
| // MemOperand currently only supports d-form |
| void MacroAssembler::LoadHalfWord(Register dst, const MemOperand& mem, |
| Register scratch) { |
| Register base = mem.ra(); |
| int offset = mem.offset(); |
| |
| if (!is_int16(offset)) { |
| LoadIntLiteral(scratch, offset); |
| lhzx(dst, MemOperand(base, scratch)); |
| } else { |
| lhz(dst, mem); |
| } |
| } |
| |
| |
| // Variable length depending on whether offset fits into immediate field |
| // MemOperand current only supports d-form |
| void MacroAssembler::StoreHalfWord(Register src, const MemOperand& mem, |
| Register scratch) { |
| Register base = mem.ra(); |
| int offset = mem.offset(); |
| |
| if (!is_int16(offset)) { |
| LoadIntLiteral(scratch, offset); |
| sthx(src, MemOperand(base, scratch)); |
| } else { |
| sth(src, mem); |
| } |
| } |
| |
| |
| // Variable length depending on whether offset fits into immediate field |
| // MemOperand currently only supports d-form |
| void MacroAssembler::LoadByte(Register dst, const MemOperand& mem, |
| Register scratch) { |
| Register base = mem.ra(); |
| int offset = mem.offset(); |
| |
| if (!is_int16(offset)) { |
| LoadIntLiteral(scratch, offset); |
| lbzx(dst, MemOperand(base, scratch)); |
| } else { |
| lbz(dst, mem); |
| } |
| } |
| |
| |
| // Variable length depending on whether offset fits into immediate field |
| // MemOperand current only supports d-form |
| void MacroAssembler::StoreByte(Register src, const MemOperand& mem, |
| Register scratch) { |
| Register base = mem.ra(); |
| int offset = mem.offset(); |
| |
| if (!is_int16(offset)) { |
| LoadIntLiteral(scratch, offset); |
| stbx(src, MemOperand(base, scratch)); |
| } else { |
| stb(src, mem); |
| } |
| } |
| |
| |
| void MacroAssembler::LoadRepresentation(Register dst, const MemOperand& mem, |
| Representation r, Register scratch) { |
| DCHECK(!r.IsDouble()); |
| if (r.IsInteger8()) { |
| LoadByte(dst, mem, scratch); |
| extsb(dst, dst); |
| } else if (r.IsUInteger8()) { |
| LoadByte(dst, mem, scratch); |
| } else if (r.IsInteger16()) { |
| LoadHalfWord(dst, mem, scratch); |
| extsh(dst, dst); |
| } else if (r.IsUInteger16()) { |
| LoadHalfWord(dst, mem, scratch); |
| #if V8_TARGET_ARCH_PPC64 |
| } else if (r.IsInteger32()) { |
| LoadWord(dst, mem, scratch); |
| #endif |
| } else { |
| LoadP(dst, mem, scratch); |
| } |
| } |
| |
| |
| void MacroAssembler::StoreRepresentation(Register src, const MemOperand& mem, |
| Representation r, Register scratch) { |
| DCHECK(!r.IsDouble()); |
| if (r.IsInteger8() || r.IsUInteger8()) { |
| StoreByte(src, mem, scratch); |
| } else if (r.IsInteger16() || r.IsUInteger16()) { |
| StoreHalfWord(src, mem, scratch); |
| #if V8_TARGET_ARCH_PPC64 |
| } else if (r.IsInteger32()) { |
| StoreWord(src, mem, scratch); |
| #endif |
| } else { |
| if (r.IsHeapObject()) { |
| AssertNotSmi(src); |
| } else if (r.IsSmi()) { |
| AssertSmi(src); |
| } |
| StoreP(src, mem, scratch); |
| } |
| } |
| |
| |
| void MacroAssembler::TestJSArrayForAllocationMemento(Register receiver_reg, |
| Register scratch_reg, |
| Label* no_memento_found) { |
| ExternalReference new_space_start = |
| ExternalReference::new_space_start(isolate()); |
| ExternalReference new_space_allocation_top = |
| ExternalReference::new_space_allocation_top_address(isolate()); |
| addi(scratch_reg, receiver_reg, |
| Operand(JSArray::kSize + AllocationMemento::kSize - kHeapObjectTag)); |
| Cmpi(scratch_reg, Operand(new_space_start), r0); |
| blt(no_memento_found); |
| mov(ip, Operand(new_space_allocation_top)); |
| LoadP(ip, MemOperand(ip)); |
| cmp(scratch_reg, ip); |
| bgt(no_memento_found); |
| LoadP(scratch_reg, MemOperand(scratch_reg, -AllocationMemento::kSize)); |
| Cmpi(scratch_reg, Operand(isolate()->factory()->allocation_memento_map()), |
| r0); |
| } |
| |
| |
| Register GetRegisterThatIsNotOneOf(Register reg1, Register reg2, Register reg3, |
| Register reg4, Register reg5, |
| Register reg6) { |
| RegList regs = 0; |
| if (reg1.is_valid()) regs |= reg1.bit(); |
| if (reg2.is_valid()) regs |= reg2.bit(); |
| if (reg3.is_valid()) regs |= reg3.bit(); |
| if (reg4.is_valid()) regs |= reg4.bit(); |
| if (reg5.is_valid()) regs |= reg5.bit(); |
| if (reg6.is_valid()) regs |= reg6.bit(); |
| |
| for (int i = 0; i < Register::NumAllocatableRegisters(); i++) { |
| Register candidate = Register::FromAllocationIndex(i); |
| if (regs & candidate.bit()) continue; |
| return candidate; |
| } |
| UNREACHABLE(); |
| return no_reg; |
| } |
| |
| |
| void MacroAssembler::JumpIfDictionaryInPrototypeChain(Register object, |
| Register scratch0, |
| Register scratch1, |
| Label* found) { |
| DCHECK(!scratch1.is(scratch0)); |
| Factory* factory = isolate()->factory(); |
| Register current = scratch0; |
| Label loop_again; |
| |
| // scratch contained elements pointer. |
| mr(current, object); |
| |
| // Loop based on the map going up the prototype chain. |
| bind(&loop_again); |
| LoadP(current, FieldMemOperand(current, HeapObject::kMapOffset)); |
| lbz(scratch1, FieldMemOperand(current, Map::kBitField2Offset)); |
| DecodeField<Map::ElementsKindBits>(scratch1); |
| cmpi(scratch1, Operand(DICTIONARY_ELEMENTS)); |
| beq(found); |
| LoadP(current, FieldMemOperand(current, Map::kPrototypeOffset)); |
| Cmpi(current, Operand(factory->null_value()), r0); |
| bne(&loop_again); |
| } |
| |
| |
| #ifdef DEBUG |
| bool AreAliased(Register reg1, Register reg2, Register reg3, Register reg4, |
| Register reg5, Register reg6, Register reg7, Register reg8) { |
| int n_of_valid_regs = reg1.is_valid() + reg2.is_valid() + reg3.is_valid() + |
| reg4.is_valid() + reg5.is_valid() + reg6.is_valid() + |
| reg7.is_valid() + reg8.is_valid(); |
| |
| RegList regs = 0; |
| if (reg1.is_valid()) regs |= reg1.bit(); |
| if (reg2.is_valid()) regs |= reg2.bit(); |
| if (reg3.is_valid()) regs |= reg3.bit(); |
| if (reg4.is_valid()) regs |= reg4.bit(); |
| if (reg5.is_valid()) regs |= reg5.bit(); |
| if (reg6.is_valid()) regs |= reg6.bit(); |
| if (reg7.is_valid()) regs |= reg7.bit(); |
| if (reg8.is_valid()) regs |= reg8.bit(); |
| int n_of_non_aliasing_regs = NumRegs(regs); |
| |
| return n_of_valid_regs != n_of_non_aliasing_regs; |
| } |
| #endif |
| |
| |
| CodePatcher::CodePatcher(byte* address, int instructions, |
| FlushICache flush_cache) |
| : address_(address), |
| size_(instructions * Assembler::kInstrSize), |
| masm_(NULL, address, size_ + Assembler::kGap), |
| flush_cache_(flush_cache) { |
| // Create a new macro assembler pointing to the address of the code to patch. |
| // The size is adjusted with kGap on order for the assembler to generate size |
| // bytes of instructions without failing with buffer size constraints. |
| DCHECK(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| } |
| |
| |
| CodePatcher::~CodePatcher() { |
| // Indicate that code has changed. |
| if (flush_cache_ == FLUSH) { |
| CpuFeatures::FlushICache(address_, size_); |
| } |
| |
| // Check that the code was patched as expected. |
| DCHECK(masm_.pc_ == address_ + size_); |
| DCHECK(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| } |
| |
| |
| void CodePatcher::Emit(Instr instr) { masm()->emit(instr); } |
| |
| |
| void CodePatcher::EmitCondition(Condition cond) { |
| Instr instr = Assembler::instr_at(masm_.pc_); |
| switch (cond) { |
| case eq: |
| instr = (instr & ~kCondMask) | BT; |
| break; |
| case ne: |
| instr = (instr & ~kCondMask) | BF; |
| break; |
| default: |
| UNIMPLEMENTED(); |
| } |
| masm_.emit(instr); |
| } |
| |
| |
| void MacroAssembler::TruncatingDiv(Register result, Register dividend, |
| int32_t divisor) { |
| DCHECK(!dividend.is(result)); |
| DCHECK(!dividend.is(r0)); |
| DCHECK(!result.is(r0)); |
| base::MagicNumbersForDivision<uint32_t> mag = |
| base::SignedDivisionByConstant(static_cast<uint32_t>(divisor)); |
| mov(r0, Operand(mag.multiplier)); |
| mulhw(result, dividend, r0); |
| bool neg = (mag.multiplier & (static_cast<uint32_t>(1) << 31)) != 0; |
| if (divisor > 0 && neg) { |
| add(result, result, dividend); |
| } |
| if (divisor < 0 && !neg && mag.multiplier > 0) { |
| sub(result, result, dividend); |
| } |
| if (mag.shift > 0) srawi(result, result, mag.shift); |
| ExtractBit(r0, dividend, 31); |
| add(result, result, r0); |
| } |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_TARGET_ARCH_PPC |