| // Copyright 2012 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 <limits.h> // For LONG_MIN, LONG_MAX. |
| |
| #include "src/v8.h" |
| |
| #if V8_TARGET_ARCH_MIPS64 |
| |
| #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), |
| has_double_zero_reg_set_(false) { |
| if (isolate() != NULL) { |
| code_object_ = Handle<Object>(isolate()->heap()->undefined_value(), |
| isolate()); |
| } |
| } |
| |
| |
| void MacroAssembler::Load(Register dst, |
| const MemOperand& src, |
| Representation r) { |
| DCHECK(!r.IsDouble()); |
| if (r.IsInteger8()) { |
| lb(dst, src); |
| } else if (r.IsUInteger8()) { |
| lbu(dst, src); |
| } else if (r.IsInteger16()) { |
| lh(dst, src); |
| } else if (r.IsUInteger16()) { |
| lhu(dst, src); |
| } else if (r.IsInteger32()) { |
| lw(dst, src); |
| } else { |
| ld(dst, src); |
| } |
| } |
| |
| |
| void MacroAssembler::Store(Register src, |
| const MemOperand& dst, |
| Representation r) { |
| DCHECK(!r.IsDouble()); |
| if (r.IsInteger8() || r.IsUInteger8()) { |
| sb(src, dst); |
| } else if (r.IsInteger16() || r.IsUInteger16()) { |
| sh(src, dst); |
| } else if (r.IsInteger32()) { |
| sw(src, dst); |
| } else { |
| if (r.IsHeapObject()) { |
| AssertNotSmi(src); |
| } else if (r.IsSmi()) { |
| AssertSmi(src); |
| } |
| sd(src, dst); |
| } |
| } |
| |
| |
| void MacroAssembler::LoadRoot(Register destination, |
| Heap::RootListIndex index) { |
| ld(destination, MemOperand(s6, index << kPointerSizeLog2)); |
| } |
| |
| |
| void MacroAssembler::LoadRoot(Register destination, |
| Heap::RootListIndex index, |
| Condition cond, |
| Register src1, const Operand& src2) { |
| Branch(2, NegateCondition(cond), src1, src2); |
| ld(destination, MemOperand(s6, index << kPointerSizeLog2)); |
| } |
| |
| |
| void MacroAssembler::StoreRoot(Register source, |
| Heap::RootListIndex index) { |
| sd(source, MemOperand(s6, index << kPointerSizeLog2)); |
| } |
| |
| |
| void MacroAssembler::StoreRoot(Register source, |
| Heap::RootListIndex index, |
| Condition cond, |
| Register src1, const Operand& src2) { |
| Branch(2, NegateCondition(cond), src1, src2); |
| sd(source, MemOperand(s6, index << kPointerSizeLog2)); |
| } |
| |
| |
| // 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) { |
| Dsubu(sp, sp, Operand(num_unsaved * kPointerSize)); |
| } |
| MultiPush(kSafepointSavedRegisters); |
| } |
| |
| |
| void MacroAssembler::PopSafepointRegisters() { |
| const int num_unsaved = kNumSafepointRegisters - kNumSafepointSavedRegisters; |
| MultiPop(kSafepointSavedRegisters); |
| if (num_unsaved > 0) { |
| Daddu(sp, sp, Operand(num_unsaved * kPointerSize)); |
| } |
| } |
| |
| |
| void MacroAssembler::StoreToSafepointRegisterSlot(Register src, Register dst) { |
| sd(src, SafepointRegisterSlot(dst)); |
| } |
| |
| |
| void MacroAssembler::LoadFromSafepointRegisterSlot(Register dst, Register src) { |
| ld(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. |
| return kSafepointRegisterStackIndexMap[reg_code]; |
| } |
| |
| |
| MemOperand MacroAssembler::SafepointRegisterSlot(Register reg) { |
| return MemOperand(sp, SafepointRegisterStackIndex(reg.code()) * kPointerSize); |
| } |
| |
| |
| MemOperand MacroAssembler::SafepointRegistersAndDoublesSlot(Register reg) { |
| UNIMPLEMENTED_MIPS(); |
| // General purpose registers are pushed last on the stack. |
| int doubles_size = FPURegister::NumAllocatableRegisters() * kDoubleSize; |
| int register_offset = SafepointRegisterStackIndex(reg.code()) * kPointerSize; |
| return MemOperand(sp, doubles_size + register_offset); |
| } |
| |
| |
| void MacroAssembler::InNewSpace(Register object, |
| Register scratch, |
| Condition cc, |
| Label* branch) { |
| DCHECK(cc == eq || cc == ne); |
| And(scratch, object, Operand(ExternalReference::new_space_mask(isolate()))); |
| Branch(branch, cc, scratch, |
| Operand(ExternalReference::new_space_start(isolate()))); |
| } |
| |
| |
| void MacroAssembler::RecordWriteField( |
| Register object, |
| int offset, |
| Register value, |
| Register dst, |
| RAStatus ra_status, |
| SaveFPRegsMode save_fp, |
| RememberedSetAction remembered_set_action, |
| SmiCheck smi_check, |
| PointersToHereCheck pointers_to_here_check_for_value) { |
| DCHECK(!AreAliased(value, dst, t8, object)); |
| // 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)); |
| |
| Daddu(dst, object, Operand(offset - kHeapObjectTag)); |
| if (emit_debug_code()) { |
| Label ok; |
| And(t8, dst, Operand((1 << kPointerSizeLog2) - 1)); |
| Branch(&ok, eq, t8, Operand(zero_reg)); |
| stop("Unaligned cell in write barrier"); |
| bind(&ok); |
| } |
| |
| RecordWrite(object, |
| dst, |
| value, |
| ra_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()) { |
| li(value, Operand(bit_cast<int64_t>(kZapValue + 4))); |
| li(dst, Operand(bit_cast<int64_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, |
| RAStatus ra_status, |
| SaveFPRegsMode fp_mode) { |
| if (emit_debug_code()) { |
| DCHECK(!dst.is(at)); |
| ld(dst, FieldMemOperand(map, HeapObject::kMapOffset)); |
| Check(eq, |
| kWrongAddressOrValuePassedToRecordWrite, |
| dst, |
| Operand(isolate()->factory()->meta_map())); |
| } |
| |
| if (!FLAG_incremental_marking) { |
| return; |
| } |
| |
| if (emit_debug_code()) { |
| ld(at, FieldMemOperand(object, HeapObject::kMapOffset)); |
| Check(eq, |
| kWrongAddressOrValuePassedToRecordWrite, |
| map, |
| Operand(at)); |
| } |
| |
| 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); |
| |
| Daddu(dst, object, Operand(HeapObject::kMapOffset - kHeapObjectTag)); |
| if (emit_debug_code()) { |
| Label ok; |
| And(at, dst, Operand((1 << kPointerSizeLog2) - 1)); |
| Branch(&ok, eq, at, Operand(zero_reg)); |
| stop("Unaligned cell in write barrier"); |
| bind(&ok); |
| } |
| |
| // Record the actual write. |
| if (ra_status == kRAHasNotBeenSaved) { |
| push(ra); |
| } |
| RecordWriteStub stub(isolate(), object, map, dst, OMIT_REMEMBERED_SET, |
| fp_mode); |
| CallStub(&stub); |
| if (ra_status == kRAHasNotBeenSaved) { |
| pop(ra); |
| } |
| |
| bind(&done); |
| |
| // Count number of write barriers in generated code. |
| isolate()->counters()->write_barriers_static()->Increment(); |
| IncrementCounter(isolate()->counters()->write_barriers_dynamic(), 1, at, dst); |
| |
| // Clobber clobbered registers when running with the debug-code flag |
| // turned on to provoke errors. |
| if (emit_debug_code()) { |
| li(dst, Operand(bit_cast<int64_t>(kZapValue + 12))); |
| li(map, Operand(bit_cast<int64_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, |
| RAStatus ra_status, |
| SaveFPRegsMode fp_mode, |
| RememberedSetAction remembered_set_action, |
| SmiCheck smi_check, |
| PointersToHereCheck pointers_to_here_check_for_value) { |
| DCHECK(!AreAliased(object, address, value, t8)); |
| DCHECK(!AreAliased(object, address, value, t9)); |
| |
| if (emit_debug_code()) { |
| ld(at, MemOperand(address)); |
| Assert( |
| eq, kWrongAddressOrValuePassedToRecordWrite, at, Operand(value)); |
| } |
| |
| 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) { |
| DCHECK_EQ(0, kSmiTag); |
| 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 (ra_status == kRAHasNotBeenSaved) { |
| push(ra); |
| } |
| RecordWriteStub stub(isolate(), object, value, address, remembered_set_action, |
| fp_mode); |
| CallStub(&stub); |
| if (ra_status == kRAHasNotBeenSaved) { |
| pop(ra); |
| } |
| |
| bind(&done); |
| |
| // Count number of write barriers in generated code. |
| isolate()->counters()->write_barriers_static()->Increment(); |
| IncrementCounter(isolate()->counters()->write_barriers_dynamic(), 1, at, |
| value); |
| |
| // Clobber clobbered registers when running with the debug-code flag |
| // turned on to provoke errors. |
| if (emit_debug_code()) { |
| li(address, Operand(bit_cast<int64_t>(kZapValue + 12))); |
| li(value, Operand(bit_cast<int64_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()); |
| li(t8, Operand(store_buffer)); |
| ld(scratch, MemOperand(t8)); |
| // Store pointer to buffer and increment buffer top. |
| sd(address, MemOperand(scratch)); |
| Daddu(scratch, scratch, kPointerSize); |
| // Write back new top of buffer. |
| sd(scratch, MemOperand(t8)); |
| // Call stub on end of buffer. |
| // Check for end of buffer. |
| And(t8, scratch, Operand(StoreBuffer::kStoreBufferOverflowBit)); |
| DCHECK(!scratch.is(t8)); |
| if (and_then == kFallThroughAtEnd) { |
| Branch(&done, eq, t8, Operand(zero_reg)); |
| } else { |
| DCHECK(and_then == kReturnAtEnd); |
| Ret(eq, t8, Operand(zero_reg)); |
| } |
| push(ra); |
| StoreBufferOverflowStub store_buffer_overflow(isolate(), fp_mode); |
| CallStub(&store_buffer_overflow); |
| pop(ra); |
| bind(&done); |
| if (and_then == kReturnAtEnd) { |
| Ret(); |
| } |
| } |
| |
| |
| // ----------------------------------------------------------------------------- |
| // Allocation support. |
| |
| |
| void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg, |
| Register scratch, |
| Label* miss) { |
| Label same_contexts; |
| |
| DCHECK(!holder_reg.is(scratch)); |
| DCHECK(!holder_reg.is(at)); |
| DCHECK(!scratch.is(at)); |
| |
| // Load current lexical context from the stack frame. |
| ld(scratch, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| // In debug mode, make sure the lexical context is set. |
| #ifdef DEBUG |
| Check(ne, kWeShouldNotHaveAnEmptyLexicalContext, |
| scratch, Operand(zero_reg)); |
| #endif |
| |
| // Load the native context of the current context. |
| int offset = |
| Context::kHeaderSize + Context::GLOBAL_OBJECT_INDEX * kPointerSize; |
| ld(scratch, FieldMemOperand(scratch, offset)); |
| ld(scratch, FieldMemOperand(scratch, GlobalObject::kNativeContextOffset)); |
| |
| // Check the context is a native context. |
| if (emit_debug_code()) { |
| push(holder_reg); // Temporarily save holder on the stack. |
| // Read the first word and compare to the native_context_map. |
| ld(holder_reg, FieldMemOperand(scratch, HeapObject::kMapOffset)); |
| LoadRoot(at, Heap::kNativeContextMapRootIndex); |
| Check(eq, kJSGlobalObjectNativeContextShouldBeANativeContext, |
| holder_reg, Operand(at)); |
| pop(holder_reg); // Restore holder. |
| } |
| |
| // Check if both contexts are the same. |
| ld(at, FieldMemOperand(holder_reg, JSGlobalProxy::kNativeContextOffset)); |
| Branch(&same_contexts, eq, scratch, Operand(at)); |
| |
| // Check the context is a native context. |
| if (emit_debug_code()) { |
| push(holder_reg); // Temporarily save holder on the stack. |
| mov(holder_reg, at); // Move at to its holding place. |
| LoadRoot(at, Heap::kNullValueRootIndex); |
| Check(ne, kJSGlobalProxyContextShouldNotBeNull, |
| holder_reg, Operand(at)); |
| |
| ld(holder_reg, FieldMemOperand(holder_reg, HeapObject::kMapOffset)); |
| LoadRoot(at, Heap::kNativeContextMapRootIndex); |
| Check(eq, kJSGlobalObjectNativeContextShouldBeANativeContext, |
| holder_reg, Operand(at)); |
| // Restore at is not needed. at is reloaded below. |
| pop(holder_reg); // Restore holder. |
| // Restore at to holder's context. |
| ld(at, 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; |
| |
| ld(scratch, FieldMemOperand(scratch, token_offset)); |
| ld(at, FieldMemOperand(at, token_offset)); |
| Branch(miss, ne, scratch, Operand(at)); |
| |
| 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 reg0, 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_(reg0, reg0, scratch); |
| |
| // Compute the hash code from the untagged key. This must be kept in sync |
| // with ComputeIntegerHash in utils.h. |
| // |
| // hash = ~hash + (hash << 15); |
| // The algorithm uses 32-bit integer values. |
| nor(scratch, reg0, zero_reg); |
| sll(at, reg0, 15); |
| addu(reg0, scratch, at); |
| |
| // hash = hash ^ (hash >> 12); |
| srl(at, reg0, 12); |
| xor_(reg0, reg0, at); |
| |
| // hash = hash + (hash << 2); |
| sll(at, reg0, 2); |
| addu(reg0, reg0, at); |
| |
| // hash = hash ^ (hash >> 4); |
| srl(at, reg0, 4); |
| xor_(reg0, reg0, at); |
| |
| // hash = hash * 2057; |
| sll(scratch, reg0, 11); |
| sll(at, reg0, 3); |
| addu(reg0, reg0, at); |
| addu(reg0, reg0, scratch); |
| |
| // hash = hash ^ (hash >> 16); |
| srl(at, reg0, 16); |
| xor_(reg0, reg0, at); |
| } |
| |
| |
| void MacroAssembler::LoadFromNumberDictionary(Label* miss, |
| Register elements, |
| Register key, |
| Register result, |
| Register reg0, |
| Register reg1, |
| Register reg2) { |
| // 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: |
| // |
| // reg0 - holds the untagged key on entry and holds the hash once computed. |
| // |
| // reg1 - Used to hold the capacity mask of the dictionary. |
| // |
| // reg2 - Used for the index into the dictionary. |
| // at - Temporary (avoid MacroAssembler instructions also using 'at'). |
| Label done; |
| |
| GetNumberHash(reg0, reg1); |
| |
| // Compute the capacity mask. |
| ld(reg1, FieldMemOperand(elements, SeededNumberDictionary::kCapacityOffset)); |
| SmiUntag(reg1, reg1); |
| Dsubu(reg1, reg1, Operand(1)); |
| |
| // Generate an unrolled loop that performs a few probes before giving up. |
| for (int i = 0; i < kNumberDictionaryProbes; i++) { |
| // Use reg2 for index calculations and keep the hash intact in reg0. |
| mov(reg2, reg0); |
| // Compute the masked index: (hash + i + i * i) & mask. |
| if (i > 0) { |
| Daddu(reg2, reg2, Operand(SeededNumberDictionary::GetProbeOffset(i))); |
| } |
| and_(reg2, reg2, reg1); |
| |
| // Scale the index by multiplying by the element size. |
| DCHECK(SeededNumberDictionary::kEntrySize == 3); |
| dsll(at, reg2, 1); // 2x. |
| daddu(reg2, reg2, at); // reg2 = reg2 * 3. |
| |
| // Check if the key is identical to the name. |
| dsll(at, reg2, kPointerSizeLog2); |
| daddu(reg2, elements, at); |
| |
| ld(at, FieldMemOperand(reg2, SeededNumberDictionary::kElementsStartOffset)); |
| if (i != kNumberDictionaryProbes - 1) { |
| Branch(&done, eq, key, Operand(at)); |
| } else { |
| Branch(miss, ne, key, Operand(at)); |
| } |
| } |
| |
| bind(&done); |
| // Check that the value is a field property. |
| // reg2: elements + (index * kPointerSize). |
| const int kDetailsOffset = |
| SeededNumberDictionary::kElementsStartOffset + 2 * kPointerSize; |
| ld(reg1, FieldMemOperand(reg2, kDetailsOffset)); |
| DCHECK_EQ(FIELD, 0); |
| And(at, reg1, Operand(Smi::FromInt(PropertyDetails::TypeField::kMask))); |
| Branch(miss, ne, at, Operand(zero_reg)); |
| |
| // Get the value at the masked, scaled index and return. |
| const int kValueOffset = |
| SeededNumberDictionary::kElementsStartOffset + kPointerSize; |
| ld(result, FieldMemOperand(reg2, kValueOffset)); |
| } |
| |
| |
| // --------------------------------------------------------------------------- |
| // Instruction macros. |
| |
| void MacroAssembler::Addu(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| addu(rd, rs, rt.rm()); |
| } else { |
| if (is_int16(rt.imm64_) && !MustUseReg(rt.rmode_)) { |
| addiu(rd, rs, rt.imm64_); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| addu(rd, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Daddu(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| daddu(rd, rs, rt.rm()); |
| } else { |
| if (is_int16(rt.imm64_) && !MustUseReg(rt.rmode_)) { |
| daddiu(rd, rs, rt.imm64_); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| daddu(rd, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Subu(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| subu(rd, rs, rt.rm()); |
| } else { |
| if (is_int16(rt.imm64_) && !MustUseReg(rt.rmode_)) { |
| addiu(rd, rs, -rt.imm64_); // No subiu instr, use addiu(x, y, -imm). |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| subu(rd, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Dsubu(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| dsubu(rd, rs, rt.rm()); |
| } else { |
| if (is_int16(rt.imm64_) && !MustUseReg(rt.rmode_)) { |
| daddiu(rd, rs, -rt.imm64_); // No subiu instr, use addiu(x, y, -imm). |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| dsubu(rd, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Mul(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| mul(rd, rs, rt.rm()); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| mul(rd, rs, at); |
| } |
| } |
| |
| |
| void MacroAssembler::Mulh(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| if (kArchVariant != kMips64r6) { |
| mult(rs, rt.rm()); |
| mfhi(rd); |
| } else { |
| muh(rd, rs, rt.rm()); |
| } |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| if (kArchVariant != kMips64r6) { |
| mult(rs, at); |
| mfhi(rd); |
| } else { |
| muh(rd, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Mulhu(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| if (kArchVariant != kMips64r6) { |
| multu(rs, rt.rm()); |
| mfhi(rd); |
| } else { |
| muhu(rd, rs, rt.rm()); |
| } |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| if (kArchVariant != kMips64r6) { |
| multu(rs, at); |
| mfhi(rd); |
| } else { |
| muhu(rd, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Dmul(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| if (kArchVariant == kMips64r6) { |
| dmul(rd, rs, rt.rm()); |
| } else { |
| dmult(rs, rt.rm()); |
| mflo(rd); |
| } |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| if (kArchVariant == kMips64r6) { |
| dmul(rd, rs, at); |
| } else { |
| dmult(rs, at); |
| mflo(rd); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Dmulh(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| if (kArchVariant == kMips64r6) { |
| dmuh(rd, rs, rt.rm()); |
| } else { |
| dmult(rs, rt.rm()); |
| mfhi(rd); |
| } |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| if (kArchVariant == kMips64r6) { |
| dmuh(rd, rs, at); |
| } else { |
| dmult(rs, at); |
| mfhi(rd); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Mult(Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| mult(rs, rt.rm()); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| mult(rs, at); |
| } |
| } |
| |
| |
| void MacroAssembler::Dmult(Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| dmult(rs, rt.rm()); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| dmult(rs, at); |
| } |
| } |
| |
| |
| void MacroAssembler::Multu(Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| multu(rs, rt.rm()); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| multu(rs, at); |
| } |
| } |
| |
| |
| void MacroAssembler::Dmultu(Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| dmultu(rs, rt.rm()); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| dmultu(rs, at); |
| } |
| } |
| |
| |
| void MacroAssembler::Div(Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| div(rs, rt.rm()); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| div(rs, at); |
| } |
| } |
| |
| |
| void MacroAssembler::Div(Register res, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| if (kArchVariant != kMips64r6) { |
| div(rs, rt.rm()); |
| mflo(res); |
| } else { |
| div(res, rs, rt.rm()); |
| } |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| if (kArchVariant != kMips64r6) { |
| div(rs, at); |
| mflo(res); |
| } else { |
| div(res, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Mod(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| if (kArchVariant != kMips64r6) { |
| div(rs, rt.rm()); |
| mfhi(rd); |
| } else { |
| mod(rd, rs, rt.rm()); |
| } |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| if (kArchVariant != kMips64r6) { |
| div(rs, at); |
| mfhi(rd); |
| } else { |
| mod(rd, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Modu(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| if (kArchVariant != kMips64r6) { |
| divu(rs, rt.rm()); |
| mfhi(rd); |
| } else { |
| modu(rd, rs, rt.rm()); |
| } |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| if (kArchVariant != kMips64r6) { |
| divu(rs, at); |
| mfhi(rd); |
| } else { |
| modu(rd, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Ddiv(Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| ddiv(rs, rt.rm()); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| ddiv(rs, at); |
| } |
| } |
| |
| |
| void MacroAssembler::Ddiv(Register rd, Register rs, const Operand& rt) { |
| if (kArchVariant != kMips64r6) { |
| if (rt.is_reg()) { |
| ddiv(rs, rt.rm()); |
| mflo(rd); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| ddiv(rs, at); |
| mflo(rd); |
| } |
| } else { |
| if (rt.is_reg()) { |
| ddiv(rd, rs, rt.rm()); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| ddiv(rd, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Divu(Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| divu(rs, rt.rm()); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| divu(rs, at); |
| } |
| } |
| |
| |
| void MacroAssembler::Divu(Register res, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| if (kArchVariant != kMips64r6) { |
| divu(rs, rt.rm()); |
| mflo(res); |
| } else { |
| divu(res, rs, rt.rm()); |
| } |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| if (kArchVariant != kMips64r6) { |
| divu(rs, at); |
| mflo(res); |
| } else { |
| divu(res, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Ddivu(Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| ddivu(rs, rt.rm()); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| ddivu(rs, at); |
| } |
| } |
| |
| |
| void MacroAssembler::Ddivu(Register res, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| if (kArchVariant != kMips64r6) { |
| ddivu(rs, rt.rm()); |
| mflo(res); |
| } else { |
| ddivu(res, rs, rt.rm()); |
| } |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| if (kArchVariant != kMips64r6) { |
| ddivu(rs, at); |
| mflo(res); |
| } else { |
| ddivu(res, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Dmod(Register rd, Register rs, const Operand& rt) { |
| if (kArchVariant != kMips64r6) { |
| if (rt.is_reg()) { |
| ddiv(rs, rt.rm()); |
| mfhi(rd); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| ddiv(rs, at); |
| mfhi(rd); |
| } |
| } else { |
| if (rt.is_reg()) { |
| dmod(rd, rs, rt.rm()); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| dmod(rd, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Dmodu(Register rd, Register rs, const Operand& rt) { |
| if (kArchVariant != kMips64r6) { |
| if (rt.is_reg()) { |
| ddivu(rs, rt.rm()); |
| mfhi(rd); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| ddivu(rs, at); |
| mfhi(rd); |
| } |
| } else { |
| if (rt.is_reg()) { |
| dmodu(rd, rs, rt.rm()); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| dmodu(rd, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::And(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| and_(rd, rs, rt.rm()); |
| } else { |
| if (is_uint16(rt.imm64_) && !MustUseReg(rt.rmode_)) { |
| andi(rd, rs, rt.imm64_); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| and_(rd, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Or(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| or_(rd, rs, rt.rm()); |
| } else { |
| if (is_uint16(rt.imm64_) && !MustUseReg(rt.rmode_)) { |
| ori(rd, rs, rt.imm64_); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| or_(rd, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Xor(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| xor_(rd, rs, rt.rm()); |
| } else { |
| if (is_uint16(rt.imm64_) && !MustUseReg(rt.rmode_)) { |
| xori(rd, rs, rt.imm64_); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| xor_(rd, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Nor(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| nor(rd, rs, rt.rm()); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| nor(rd, rs, at); |
| } |
| } |
| |
| |
| void MacroAssembler::Neg(Register rs, const Operand& rt) { |
| DCHECK(rt.is_reg()); |
| DCHECK(!at.is(rs)); |
| DCHECK(!at.is(rt.rm())); |
| li(at, -1); |
| xor_(rs, rt.rm(), at); |
| } |
| |
| |
| void MacroAssembler::Slt(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| slt(rd, rs, rt.rm()); |
| } else { |
| if (is_int16(rt.imm64_) && !MustUseReg(rt.rmode_)) { |
| slti(rd, rs, rt.imm64_); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| slt(rd, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Sltu(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| sltu(rd, rs, rt.rm()); |
| } else { |
| if (is_int16(rt.imm64_) && !MustUseReg(rt.rmode_)) { |
| sltiu(rd, rs, rt.imm64_); |
| } else { |
| // li handles the relocation. |
| DCHECK(!rs.is(at)); |
| li(at, rt); |
| sltu(rd, rs, at); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Ror(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| rotrv(rd, rs, rt.rm()); |
| } else { |
| rotr(rd, rs, rt.imm64_); |
| } |
| } |
| |
| |
| void MacroAssembler::Dror(Register rd, Register rs, const Operand& rt) { |
| if (rt.is_reg()) { |
| drotrv(rd, rs, rt.rm()); |
| } else { |
| drotr(rd, rs, rt.imm64_); |
| } |
| } |
| |
| |
| void MacroAssembler::Pref(int32_t hint, const MemOperand& rs) { |
| pref(hint, rs); |
| } |
| |
| |
| // ------------Pseudo-instructions------------- |
| |
| void MacroAssembler::Ulw(Register rd, const MemOperand& rs) { |
| lwr(rd, rs); |
| lwl(rd, MemOperand(rs.rm(), rs.offset() + 3)); |
| } |
| |
| |
| void MacroAssembler::Usw(Register rd, const MemOperand& rs) { |
| swr(rd, rs); |
| swl(rd, MemOperand(rs.rm(), rs.offset() + 3)); |
| } |
| |
| |
| // Do 64-bit load from unaligned address. Note this only handles |
| // the specific case of 32-bit aligned, but not 64-bit aligned. |
| void MacroAssembler::Uld(Register rd, const MemOperand& rs, Register scratch) { |
| // Assert fail if the offset from start of object IS actually aligned. |
| // ONLY use with known misalignment, since there is performance cost. |
| DCHECK((rs.offset() + kHeapObjectTag) & (kPointerSize - 1)); |
| // TODO(plind): endian dependency. |
| lwu(rd, rs); |
| lw(scratch, MemOperand(rs.rm(), rs.offset() + kPointerSize / 2)); |
| dsll32(scratch, scratch, 0); |
| Daddu(rd, rd, scratch); |
| } |
| |
| |
| // Do 64-bit store to unaligned address. Note this only handles |
| // the specific case of 32-bit aligned, but not 64-bit aligned. |
| void MacroAssembler::Usd(Register rd, const MemOperand& rs, Register scratch) { |
| // Assert fail if the offset from start of object IS actually aligned. |
| // ONLY use with known misalignment, since there is performance cost. |
| DCHECK((rs.offset() + kHeapObjectTag) & (kPointerSize - 1)); |
| // TODO(plind): endian dependency. |
| sw(rd, rs); |
| dsrl32(scratch, rd, 0); |
| sw(scratch, MemOperand(rs.rm(), rs.offset() + kPointerSize / 2)); |
| } |
| |
| |
| void MacroAssembler::li(Register dst, Handle<Object> value, LiFlags mode) { |
| AllowDeferredHandleDereference smi_check; |
| if (value->IsSmi()) { |
| li(dst, Operand(value), mode); |
| } else { |
| DCHECK(value->IsHeapObject()); |
| if (isolate()->heap()->InNewSpace(*value)) { |
| Handle<Cell> cell = isolate()->factory()->NewCell(value); |
| li(dst, Operand(cell)); |
| ld(dst, FieldMemOperand(dst, Cell::kValueOffset)); |
| } else { |
| li(dst, Operand(value)); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::li(Register rd, Operand j, LiFlags mode) { |
| DCHECK(!j.is_reg()); |
| BlockTrampolinePoolScope block_trampoline_pool(this); |
| if (!MustUseReg(j.rmode_) && mode == OPTIMIZE_SIZE) { |
| // Normal load of an immediate value which does not need Relocation Info. |
| if (is_int32(j.imm64_)) { |
| if (is_int16(j.imm64_)) { |
| daddiu(rd, zero_reg, (j.imm64_ & kImm16Mask)); |
| } else if (!(j.imm64_ & kHiMask)) { |
| ori(rd, zero_reg, (j.imm64_ & kImm16Mask)); |
| } else if (!(j.imm64_ & kImm16Mask)) { |
| lui(rd, (j.imm64_ >> kLuiShift) & kImm16Mask); |
| } else { |
| lui(rd, (j.imm64_ >> kLuiShift) & kImm16Mask); |
| ori(rd, rd, (j.imm64_ & kImm16Mask)); |
| } |
| } else { |
| lui(rd, (j.imm64_ >> 48) & kImm16Mask); |
| ori(rd, rd, (j.imm64_ >> 32) & kImm16Mask); |
| dsll(rd, rd, 16); |
| ori(rd, rd, (j.imm64_ >> 16) & kImm16Mask); |
| dsll(rd, rd, 16); |
| ori(rd, rd, j.imm64_ & kImm16Mask); |
| } |
| } else if (MustUseReg(j.rmode_)) { |
| RecordRelocInfo(j.rmode_, j.imm64_); |
| lui(rd, (j.imm64_ >> 32) & kImm16Mask); |
| ori(rd, rd, (j.imm64_ >> 16) & kImm16Mask); |
| dsll(rd, rd, 16); |
| ori(rd, rd, j.imm64_ & kImm16Mask); |
| } else if (mode == ADDRESS_LOAD) { |
| // We always need the same number of instructions as we may need to patch |
| // this code to load another value which may need all 4 instructions. |
| lui(rd, (j.imm64_ >> 32) & kImm16Mask); |
| ori(rd, rd, (j.imm64_ >> 16) & kImm16Mask); |
| dsll(rd, rd, 16); |
| ori(rd, rd, j.imm64_ & kImm16Mask); |
| } else { |
| lui(rd, (j.imm64_ >> 48) & kImm16Mask); |
| ori(rd, rd, (j.imm64_ >> 32) & kImm16Mask); |
| dsll(rd, rd, 16); |
| ori(rd, rd, (j.imm64_ >> 16) & kImm16Mask); |
| dsll(rd, rd, 16); |
| ori(rd, rd, j.imm64_ & kImm16Mask); |
| } |
| } |
| |
| |
| void MacroAssembler::MultiPush(RegList regs) { |
| int16_t num_to_push = NumberOfBitsSet(regs); |
| int16_t stack_offset = num_to_push * kPointerSize; |
| |
| Dsubu(sp, sp, Operand(stack_offset)); |
| for (int16_t i = kNumRegisters - 1; i >= 0; i--) { |
| if ((regs & (1 << i)) != 0) { |
| stack_offset -= kPointerSize; |
| sd(ToRegister(i), MemOperand(sp, stack_offset)); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::MultiPushReversed(RegList regs) { |
| int16_t num_to_push = NumberOfBitsSet(regs); |
| int16_t stack_offset = num_to_push * kPointerSize; |
| |
| Dsubu(sp, sp, Operand(stack_offset)); |
| for (int16_t i = 0; i < kNumRegisters; i++) { |
| if ((regs & (1 << i)) != 0) { |
| stack_offset -= kPointerSize; |
| sd(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) { |
| ld(ToRegister(i), MemOperand(sp, stack_offset)); |
| stack_offset += kPointerSize; |
| } |
| } |
| daddiu(sp, sp, stack_offset); |
| } |
| |
| |
| void MacroAssembler::MultiPopReversed(RegList regs) { |
| int16_t stack_offset = 0; |
| |
| for (int16_t i = kNumRegisters - 1; i >= 0; i--) { |
| if ((regs & (1 << i)) != 0) { |
| ld(ToRegister(i), MemOperand(sp, stack_offset)); |
| stack_offset += kPointerSize; |
| } |
| } |
| daddiu(sp, sp, stack_offset); |
| } |
| |
| |
| void MacroAssembler::MultiPushFPU(RegList regs) { |
| int16_t num_to_push = NumberOfBitsSet(regs); |
| int16_t stack_offset = num_to_push * kDoubleSize; |
| |
| Dsubu(sp, sp, Operand(stack_offset)); |
| for (int16_t i = kNumRegisters - 1; i >= 0; i--) { |
| if ((regs & (1 << i)) != 0) { |
| stack_offset -= kDoubleSize; |
| sdc1(FPURegister::from_code(i), MemOperand(sp, stack_offset)); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::MultiPushReversedFPU(RegList regs) { |
| int16_t num_to_push = NumberOfBitsSet(regs); |
| int16_t stack_offset = num_to_push * kDoubleSize; |
| |
| Dsubu(sp, sp, Operand(stack_offset)); |
| for (int16_t i = 0; i < kNumRegisters; i++) { |
| if ((regs & (1 << i)) != 0) { |
| stack_offset -= kDoubleSize; |
| sdc1(FPURegister::from_code(i), MemOperand(sp, stack_offset)); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::MultiPopFPU(RegList regs) { |
| int16_t stack_offset = 0; |
| |
| for (int16_t i = 0; i < kNumRegisters; i++) { |
| if ((regs & (1 << i)) != 0) { |
| ldc1(FPURegister::from_code(i), MemOperand(sp, stack_offset)); |
| stack_offset += kDoubleSize; |
| } |
| } |
| daddiu(sp, sp, stack_offset); |
| } |
| |
| |
| void MacroAssembler::MultiPopReversedFPU(RegList regs) { |
| int16_t stack_offset = 0; |
| |
| for (int16_t i = kNumRegisters - 1; i >= 0; i--) { |
| if ((regs & (1 << i)) != 0) { |
| ldc1(FPURegister::from_code(i), MemOperand(sp, stack_offset)); |
| stack_offset += kDoubleSize; |
| } |
| } |
| daddiu(sp, sp, stack_offset); |
| } |
| |
| |
| void MacroAssembler::FlushICache(Register address, unsigned instructions) { |
| RegList saved_regs = kJSCallerSaved | ra.bit(); |
| MultiPush(saved_regs); |
| AllowExternalCallThatCantCauseGC scope(this); |
| |
| // Save to a0 in case address == a4. |
| Move(a0, address); |
| PrepareCallCFunction(2, a4); |
| |
| li(a1, instructions * kInstrSize); |
| CallCFunction(ExternalReference::flush_icache_function(isolate()), 2); |
| MultiPop(saved_regs); |
| } |
| |
| |
| void MacroAssembler::Ext(Register rt, |
| Register rs, |
| uint16_t pos, |
| uint16_t size) { |
| DCHECK(pos < 32); |
| DCHECK(pos + size < 33); |
| ext_(rt, rs, pos, size); |
| } |
| |
| |
| void MacroAssembler::Dext(Register rt, Register rs, uint16_t pos, |
| uint16_t size) { |
| DCHECK(pos < 32); |
| DCHECK(pos + size < 33); |
| dext_(rt, rs, pos, size); |
| } |
| |
| |
| void MacroAssembler::Ins(Register rt, |
| Register rs, |
| uint16_t pos, |
| uint16_t size) { |
| DCHECK(pos < 32); |
| DCHECK(pos + size <= 32); |
| DCHECK(size != 0); |
| ins_(rt, rs, pos, size); |
| } |
| |
| |
| void MacroAssembler::Cvt_d_uw(FPURegister fd, |
| FPURegister fs, |
| FPURegister scratch) { |
| // Move the data from fs to t8. |
| mfc1(t8, fs); |
| Cvt_d_uw(fd, t8, scratch); |
| } |
| |
| |
| void MacroAssembler::Cvt_d_uw(FPURegister fd, |
| Register rs, |
| FPURegister scratch) { |
| // Convert rs to a FP value in fd (and fd + 1). |
| // We do this by converting rs minus the MSB to avoid sign conversion, |
| // then adding 2^31 to the result (if needed). |
| |
| DCHECK(!fd.is(scratch)); |
| DCHECK(!rs.is(t9)); |
| DCHECK(!rs.is(at)); |
| |
| // Save rs's MSB to t9. |
| Ext(t9, rs, 31, 1); |
| // Remove rs's MSB. |
| Ext(at, rs, 0, 31); |
| // Move the result to fd. |
| mtc1(at, fd); |
| mthc1(zero_reg, fd); |
| |
| // Convert fd to a real FP value. |
| cvt_d_w(fd, fd); |
| |
| Label conversion_done; |
| |
| // If rs's MSB was 0, it's done. |
| // Otherwise we need to add that to the FP register. |
| Branch(&conversion_done, eq, t9, Operand(zero_reg)); |
| |
| // Load 2^31 into f20 as its float representation. |
| li(at, 0x41E00000); |
| mtc1(zero_reg, scratch); |
| mthc1(at, scratch); |
| // Add it to fd. |
| add_d(fd, fd, scratch); |
| |
| bind(&conversion_done); |
| } |
| |
| |
| void MacroAssembler::Round_l_d(FPURegister fd, FPURegister fs) { |
| round_l_d(fd, fs); |
| } |
| |
| |
| void MacroAssembler::Floor_l_d(FPURegister fd, FPURegister fs) { |
| floor_l_d(fd, fs); |
| } |
| |
| |
| void MacroAssembler::Ceil_l_d(FPURegister fd, FPURegister fs) { |
| ceil_l_d(fd, fs); |
| } |
| |
| |
| void MacroAssembler::Trunc_l_d(FPURegister fd, FPURegister fs) { |
| trunc_l_d(fd, fs); |
| } |
| |
| |
| void MacroAssembler::Trunc_l_ud(FPURegister fd, |
| FPURegister fs, |
| FPURegister scratch) { |
| // Load to GPR. |
| dmfc1(t8, fs); |
| // Reset sign bit. |
| li(at, 0x7fffffffffffffff); |
| and_(t8, t8, at); |
| dmtc1(t8, fs); |
| trunc_l_d(fd, fs); |
| } |
| |
| |
| void MacroAssembler::Trunc_uw_d(FPURegister fd, |
| FPURegister fs, |
| FPURegister scratch) { |
| Trunc_uw_d(fs, t8, scratch); |
| mtc1(t8, fd); |
| } |
| |
| |
| void MacroAssembler::Trunc_w_d(FPURegister fd, FPURegister fs) { |
| trunc_w_d(fd, fs); |
| } |
| |
| |
| void MacroAssembler::Round_w_d(FPURegister fd, FPURegister fs) { |
| round_w_d(fd, fs); |
| } |
| |
| |
| void MacroAssembler::Floor_w_d(FPURegister fd, FPURegister fs) { |
| floor_w_d(fd, fs); |
| } |
| |
| |
| void MacroAssembler::Ceil_w_d(FPURegister fd, FPURegister fs) { |
| ceil_w_d(fd, fs); |
| } |
| |
| |
| void MacroAssembler::Trunc_uw_d(FPURegister fd, |
| Register rs, |
| FPURegister scratch) { |
| DCHECK(!fd.is(scratch)); |
| DCHECK(!rs.is(at)); |
| |
| // Load 2^31 into scratch as its float representation. |
| li(at, 0x41E00000); |
| mtc1(zero_reg, scratch); |
| mthc1(at, scratch); |
| // Test if scratch > fd. |
| // If fd < 2^31 we can convert it normally. |
| Label simple_convert; |
| BranchF(&simple_convert, NULL, lt, fd, scratch); |
| |
| // First we subtract 2^31 from fd, then trunc it to rs |
| // and add 2^31 to rs. |
| sub_d(scratch, fd, scratch); |
| trunc_w_d(scratch, scratch); |
| mfc1(rs, scratch); |
| Or(rs, rs, 1 << 31); |
| |
| Label done; |
| Branch(&done); |
| // Simple conversion. |
| bind(&simple_convert); |
| trunc_w_d(scratch, fd); |
| mfc1(rs, scratch); |
| |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::Madd_d(FPURegister fd, FPURegister fr, FPURegister fs, |
| FPURegister ft, FPURegister scratch) { |
| if (0) { // TODO(plind): find reasonable arch-variant symbol names. |
| madd_d(fd, fr, fs, ft); |
| } else { |
| // Can not change source regs's value. |
| DCHECK(!fr.is(scratch) && !fs.is(scratch) && !ft.is(scratch)); |
| mul_d(scratch, fs, ft); |
| add_d(fd, fr, scratch); |
| } |
| } |
| |
| |
| void MacroAssembler::BranchF(Label* target, |
| Label* nan, |
| Condition cc, |
| FPURegister cmp1, |
| FPURegister cmp2, |
| BranchDelaySlot bd) { |
| BlockTrampolinePoolScope block_trampoline_pool(this); |
| if (cc == al) { |
| Branch(bd, target); |
| return; |
| } |
| |
| DCHECK(nan || target); |
| // Check for unordered (NaN) cases. |
| if (nan) { |
| if (kArchVariant != kMips64r6) { |
| c(UN, D, cmp1, cmp2); |
| bc1t(nan); |
| } else { |
| // Use f31 for comparison result. It has to be unavailable to lithium |
| // register allocator. |
| DCHECK(!cmp1.is(f31) && !cmp2.is(f31)); |
| cmp(UN, L, f31, cmp1, cmp2); |
| bc1nez(nan, f31); |
| } |
| } |
| |
| if (kArchVariant != kMips64r6) { |
| if (target) { |
| // Here NaN cases were either handled by this function or are assumed to |
| // have been handled by the caller. |
| switch (cc) { |
| case lt: |
| c(OLT, D, cmp1, cmp2); |
| bc1t(target); |
| break; |
| case gt: |
| c(ULE, D, cmp1, cmp2); |
| bc1f(target); |
| break; |
| case ge: |
| c(ULT, D, cmp1, cmp2); |
| bc1f(target); |
| break; |
| case le: |
| c(OLE, D, cmp1, cmp2); |
| bc1t(target); |
| break; |
| case eq: |
| c(EQ, D, cmp1, cmp2); |
| bc1t(target); |
| break; |
| case ueq: |
| c(UEQ, D, cmp1, cmp2); |
| bc1t(target); |
| break; |
| case ne: |
| c(EQ, D, cmp1, cmp2); |
| bc1f(target); |
| break; |
| case nue: |
| c(UEQ, D, cmp1, cmp2); |
| bc1f(target); |
| break; |
| default: |
| CHECK(0); |
| } |
| } |
| } else { |
| if (target) { |
| // Here NaN cases were either handled by this function or are assumed to |
| // have been handled by the caller. |
| // Unsigned conditions are treated as their signed counterpart. |
| // Use f31 for comparison result, it is valid in fp64 (FR = 1) mode. |
| DCHECK(!cmp1.is(f31) && !cmp2.is(f31)); |
| switch (cc) { |
| case lt: |
| cmp(OLT, L, f31, cmp1, cmp2); |
| bc1nez(target, f31); |
| break; |
| case gt: |
| cmp(ULE, L, f31, cmp1, cmp2); |
| bc1eqz(target, f31); |
| break; |
| case ge: |
| cmp(ULT, L, f31, cmp1, cmp2); |
| bc1eqz(target, f31); |
| break; |
| case le: |
| cmp(OLE, L, f31, cmp1, cmp2); |
| bc1nez(target, f31); |
| break; |
| case eq: |
| cmp(EQ, L, f31, cmp1, cmp2); |
| bc1nez(target, f31); |
| break; |
| case ueq: |
| cmp(UEQ, L, f31, cmp1, cmp2); |
| bc1nez(target, f31); |
| break; |
| case ne: |
| cmp(EQ, L, f31, cmp1, cmp2); |
| bc1eqz(target, f31); |
| break; |
| case nue: |
| cmp(UEQ, L, f31, cmp1, cmp2); |
| bc1eqz(target, f31); |
| break; |
| default: |
| CHECK(0); |
| } |
| } |
| } |
| |
| if (bd == PROTECT) { |
| nop(); |
| } |
| } |
| |
| |
| void MacroAssembler::Move(FPURegister dst, float imm) { |
| li(at, Operand(bit_cast<int32_t>(imm))); |
| mtc1(at, dst); |
| } |
| |
| |
| void MacroAssembler::Move(FPURegister dst, double imm) { |
| static const DoubleRepresentation minus_zero(-0.0); |
| static const DoubleRepresentation zero(0.0); |
| DoubleRepresentation value_rep(imm); |
| // Handle special values first. |
| if (value_rep == zero && has_double_zero_reg_set_) { |
| mov_d(dst, kDoubleRegZero); |
| } else if (value_rep == minus_zero && has_double_zero_reg_set_) { |
| neg_d(dst, kDoubleRegZero); |
| } else { |
| uint32_t lo, hi; |
| DoubleAsTwoUInt32(imm, &lo, &hi); |
| // Move the low part of the double into the lower bits of the corresponding |
| // FPU register. |
| if (lo != 0) { |
| li(at, Operand(lo)); |
| mtc1(at, dst); |
| } else { |
| mtc1(zero_reg, dst); |
| } |
| // Move the high part of the double into the high bits of the corresponding |
| // FPU register. |
| if (hi != 0) { |
| li(at, Operand(hi)); |
| mthc1(at, dst); |
| } else { |
| mthc1(zero_reg, dst); |
| } |
| if (dst.is(kDoubleRegZero)) has_double_zero_reg_set_ = true; |
| } |
| } |
| |
| |
| void MacroAssembler::Movz(Register rd, Register rs, Register rt) { |
| if (kArchVariant == kMips64r6) { |
| Label done; |
| Branch(&done, ne, rt, Operand(zero_reg)); |
| mov(rd, rs); |
| bind(&done); |
| } else { |
| movz(rd, rs, rt); |
| } |
| } |
| |
| |
| void MacroAssembler::Movn(Register rd, Register rs, Register rt) { |
| if (kArchVariant == kMips64r6) { |
| Label done; |
| Branch(&done, eq, rt, Operand(zero_reg)); |
| mov(rd, rs); |
| bind(&done); |
| } else { |
| movn(rd, rs, rt); |
| } |
| } |
| |
| |
| void MacroAssembler::Movt(Register rd, Register rs, uint16_t cc) { |
| movt(rd, rs, cc); |
| } |
| |
| |
| void MacroAssembler::Movf(Register rd, Register rs, uint16_t cc) { |
| movf(rd, rs, cc); |
| } |
| |
| |
| void MacroAssembler::Clz(Register rd, Register rs) { |
| clz(rd, rs); |
| } |
| |
| |
| void MacroAssembler::EmitFPUTruncate(FPURoundingMode rounding_mode, |
| Register result, |
| DoubleRegister double_input, |
| Register scratch, |
| DoubleRegister double_scratch, |
| Register except_flag, |
| CheckForInexactConversion check_inexact) { |
| DCHECK(!result.is(scratch)); |
| DCHECK(!double_input.is(double_scratch)); |
| DCHECK(!except_flag.is(scratch)); |
| |
| Label done; |
| |
| // Clear the except flag (0 = no exception) |
| mov(except_flag, zero_reg); |
| |
| // Test for values that can be exactly represented as a signed 32-bit integer. |
| cvt_w_d(double_scratch, double_input); |
| mfc1(result, double_scratch); |
| cvt_d_w(double_scratch, double_scratch); |
| BranchF(&done, NULL, eq, double_input, double_scratch); |
| |
| int32_t except_mask = kFCSRFlagMask; // Assume interested in all exceptions. |
| |
| if (check_inexact == kDontCheckForInexactConversion) { |
| // Ignore inexact exceptions. |
| except_mask &= ~kFCSRInexactFlagMask; |
| } |
| |
| // Save FCSR. |
| cfc1(scratch, FCSR); |
| // Disable FPU exceptions. |
| ctc1(zero_reg, FCSR); |
| |
| // Do operation based on rounding mode. |
| switch (rounding_mode) { |
| case kRoundToNearest: |
| Round_w_d(double_scratch, double_input); |
| break; |
| case kRoundToZero: |
| Trunc_w_d(double_scratch, double_input); |
| break; |
| case kRoundToPlusInf: |
| Ceil_w_d(double_scratch, double_input); |
| break; |
| case kRoundToMinusInf: |
| Floor_w_d(double_scratch, double_input); |
| break; |
| } // End of switch-statement. |
| |
| // Retrieve FCSR. |
| cfc1(except_flag, FCSR); |
| // Restore FCSR. |
| ctc1(scratch, FCSR); |
| // Move the converted value into the result register. |
| mfc1(result, double_scratch); |
| |
| // Check for fpu exceptions. |
| And(except_flag, except_flag, Operand(except_mask)); |
| |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::TryInlineTruncateDoubleToI(Register result, |
| DoubleRegister double_input, |
| Label* done) { |
| DoubleRegister single_scratch = kLithiumScratchDouble.low(); |
| Register scratch = at; |
| Register scratch2 = t9; |
| |
| // Clear cumulative exception flags and save the FCSR. |
| cfc1(scratch2, FCSR); |
| ctc1(zero_reg, FCSR); |
| // Try a conversion to a signed integer. |
| trunc_w_d(single_scratch, double_input); |
| mfc1(result, single_scratch); |
| // Retrieve and restore the FCSR. |
| cfc1(scratch, FCSR); |
| ctc1(scratch2, FCSR); |
| // Check for overflow and NaNs. |
| And(scratch, |
| scratch, |
| kFCSROverflowFlagMask | kFCSRUnderflowFlagMask | kFCSRInvalidOpFlagMask); |
| // If we had no exceptions we are done. |
| Branch(done, eq, scratch, Operand(zero_reg)); |
| } |
| |
| |
| 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. |
| push(ra); |
| Dsubu(sp, sp, Operand(kDoubleSize)); // Put input on stack. |
| sdc1(double_input, MemOperand(sp, 0)); |
| |
| DoubleToIStub stub(isolate(), sp, result, 0, true, true); |
| CallStub(&stub); |
| |
| Daddu(sp, sp, Operand(kDoubleSize)); |
| pop(ra); |
| |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::TruncateHeapNumberToI(Register result, Register object) { |
| Label done; |
| DoubleRegister double_scratch = f12; |
| DCHECK(!result.is(object)); |
| |
| ldc1(double_scratch, |
| MemOperand(object, HeapNumber::kValueOffset - kHeapObjectTag)); |
| TryInlineTruncateDoubleToI(result, double_scratch, &done); |
| |
| // If we fell through then inline version didn't succeed - call stub instead. |
| push(ra); |
| DoubleToIStub stub(isolate(), |
| object, |
| result, |
| HeapNumber::kValueOffset - kHeapObjectTag, |
| true, |
| true); |
| CallStub(&stub); |
| pop(ra); |
| |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::TruncateNumberToI(Register object, |
| Register result, |
| Register heap_number_map, |
| Register scratch, |
| Label* not_number) { |
| Label done; |
| DCHECK(!result.is(object)); |
| |
| UntagAndJumpIfSmi(result, object, &done); |
| JumpIfNotHeapNumber(object, heap_number_map, scratch, not_number); |
| TruncateHeapNumberToI(result, object); |
| |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::GetLeastBitsFromSmi(Register dst, |
| Register src, |
| int num_least_bits) { |
| // Ext(dst, src, kSmiTagSize, num_least_bits); |
| SmiUntag(dst, src); |
| And(dst, dst, Operand((1 << num_least_bits) - 1)); |
| } |
| |
| |
| void MacroAssembler::GetLeastBitsFromInt32(Register dst, |
| Register src, |
| int num_least_bits) { |
| DCHECK(!src.is(dst)); |
| And(dst, src, Operand((1 << num_least_bits) - 1)); |
| } |
| |
| |
| // Emulated condtional branches do not emit a nop in the branch delay slot. |
| // |
| // BRANCH_ARGS_CHECK checks that conditional jump arguments are correct. |
| #define BRANCH_ARGS_CHECK(cond, rs, rt) DCHECK( \ |
| (cond == cc_always && rs.is(zero_reg) && rt.rm().is(zero_reg)) || \ |
| (cond != cc_always && (!rs.is(zero_reg) || !rt.rm().is(zero_reg)))) |
| |
| |
| void MacroAssembler::Branch(int16_t offset, BranchDelaySlot bdslot) { |
| BranchShort(offset, bdslot); |
| } |
| |
| |
| void MacroAssembler::Branch(int16_t offset, Condition cond, Register rs, |
| const Operand& rt, |
| BranchDelaySlot bdslot) { |
| BranchShort(offset, cond, rs, rt, bdslot); |
| } |
| |
| |
| void MacroAssembler::Branch(Label* L, BranchDelaySlot bdslot) { |
| if (L->is_bound()) { |
| if (is_near(L)) { |
| BranchShort(L, bdslot); |
| } else { |
| Jr(L, bdslot); |
| } |
| } else { |
| if (is_trampoline_emitted()) { |
| Jr(L, bdslot); |
| } else { |
| BranchShort(L, bdslot); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Branch(Label* L, Condition cond, Register rs, |
| const Operand& rt, |
| BranchDelaySlot bdslot) { |
| if (L->is_bound()) { |
| if (is_near(L)) { |
| BranchShort(L, cond, rs, rt, bdslot); |
| } else { |
| if (cond != cc_always) { |
| Label skip; |
| Condition neg_cond = NegateCondition(cond); |
| BranchShort(&skip, neg_cond, rs, rt); |
| Jr(L, bdslot); |
| bind(&skip); |
| } else { |
| Jr(L, bdslot); |
| } |
| } |
| } else { |
| if (is_trampoline_emitted()) { |
| if (cond != cc_always) { |
| Label skip; |
| Condition neg_cond = NegateCondition(cond); |
| BranchShort(&skip, neg_cond, rs, rt); |
| Jr(L, bdslot); |
| bind(&skip); |
| } else { |
| Jr(L, bdslot); |
| } |
| } else { |
| BranchShort(L, cond, rs, rt, bdslot); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::Branch(Label* L, |
| Condition cond, |
| Register rs, |
| Heap::RootListIndex index, |
| BranchDelaySlot bdslot) { |
| LoadRoot(at, index); |
| Branch(L, cond, rs, Operand(at), bdslot); |
| } |
| |
| |
| void MacroAssembler::BranchShort(int16_t offset, BranchDelaySlot bdslot) { |
| b(offset); |
| |
| // Emit a nop in the branch delay slot if required. |
| if (bdslot == PROTECT) |
| nop(); |
| } |
| |
| |
| void MacroAssembler::BranchShort(int16_t offset, Condition cond, Register rs, |
| const Operand& rt, |
| BranchDelaySlot bdslot) { |
| BRANCH_ARGS_CHECK(cond, rs, rt); |
| DCHECK(!rs.is(zero_reg)); |
| Register r2 = no_reg; |
| Register scratch = at; |
| |
| if (rt.is_reg()) { |
| // NOTE: 'at' can be clobbered by Branch but it is legal to use it as rs or |
| // rt. |
| BlockTrampolinePoolScope block_trampoline_pool(this); |
| r2 = rt.rm_; |
| switch (cond) { |
| case cc_always: |
| b(offset); |
| break; |
| case eq: |
| beq(rs, r2, offset); |
| break; |
| case ne: |
| bne(rs, r2, offset); |
| break; |
| // Signed comparison. |
| case greater: |
| if (r2.is(zero_reg)) { |
| bgtz(rs, offset); |
| } else { |
| slt(scratch, r2, rs); |
| bne(scratch, zero_reg, offset); |
| } |
| break; |
| case greater_equal: |
| if (r2.is(zero_reg)) { |
| bgez(rs, offset); |
| } else { |
| slt(scratch, rs, r2); |
| beq(scratch, zero_reg, offset); |
| } |
| break; |
| case less: |
| if (r2.is(zero_reg)) { |
| bltz(rs, offset); |
| } else { |
| slt(scratch, rs, r2); |
| bne(scratch, zero_reg, offset); |
| } |
| break; |
| case less_equal: |
| if (r2.is(zero_reg)) { |
| blez(rs, offset); |
| } else { |
| slt(scratch, r2, rs); |
| beq(scratch, zero_reg, offset); |
| } |
| break; |
| // Unsigned comparison. |
| case Ugreater: |
| if (r2.is(zero_reg)) { |
| bgtz(rs, offset); |
| } else { |
| sltu(scratch, r2, rs); |
| bne(scratch, zero_reg, offset); |
| } |
| break; |
| case Ugreater_equal: |
| if (r2.is(zero_reg)) { |
| bgez(rs, offset); |
| } else { |
| sltu(scratch, rs, r2); |
| beq(scratch, zero_reg, offset); |
| } |
| break; |
| case Uless: |
| if (r2.is(zero_reg)) { |
| // No code needs to be emitted. |
| return; |
| } else { |
| sltu(scratch, rs, r2); |
| bne(scratch, zero_reg, offset); |
| } |
| break; |
| case Uless_equal: |
| if (r2.is(zero_reg)) { |
| b(offset); |
| } else { |
| sltu(scratch, r2, rs); |
| beq(scratch, zero_reg, offset); |
| } |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| } else { |
| // Be careful to always use shifted_branch_offset only just before the |
| // branch instruction, as the location will be remember for patching the |
| // target. |
| BlockTrampolinePoolScope block_trampoline_pool(this); |
| switch (cond) { |
| case cc_always: |
| b(offset); |
| break; |
| case eq: |
| if (rt.imm64_ == 0) { |
| beq(rs, zero_reg, offset); |
| } else { |
| // We don't want any other register but scratch clobbered. |
| DCHECK(!scratch.is(rs)); |
| r2 = scratch; |
| li(r2, rt); |
| beq(rs, r2, offset); |
| } |
| break; |
| case ne: |
| if (rt.imm64_ == 0) { |
| bne(rs, zero_reg, offset); |
| } else { |
| // We don't want any other register but scratch clobbered. |
| DCHECK(!scratch.is(rs)); |
| r2 = scratch; |
| li(r2, rt); |
| bne(rs, r2, offset); |
| } |
| break; |
| // Signed comparison. |
| case greater: |
| if (rt.imm64_ == 0) { |
| bgtz(rs, offset); |
| } else { |
| r2 = scratch; |
| li(r2, rt); |
| slt(scratch, r2, rs); |
| bne(scratch, zero_reg, offset); |
| } |
| break; |
| case greater_equal: |
| if (rt.imm64_ == 0) { |
| bgez(rs, offset); |
| } else if (is_int16(rt.imm64_)) { |
| slti(scratch, rs, rt.imm64_); |
| beq(scratch, zero_reg, offset); |
| } else { |
| r2 = scratch; |
| li(r2, rt); |
| slt(scratch, rs, r2); |
| beq(scratch, zero_reg, offset); |
| } |
| break; |
| case less: |
| if (rt.imm64_ == 0) { |
| bltz(rs, offset); |
| } else if (is_int16(rt.imm64_)) { |
| slti(scratch, rs, rt.imm64_); |
| bne(scratch, zero_reg, offset); |
| } else { |
| r2 = scratch; |
| li(r2, rt); |
| slt(scratch, rs, r2); |
| bne(scratch, zero_reg, offset); |
| } |
| break; |
| case less_equal: |
| if (rt.imm64_ == 0) { |
| blez(rs, offset); |
| } else { |
| r2 = scratch; |
| li(r2, rt); |
| slt(scratch, r2, rs); |
| beq(scratch, zero_reg, offset); |
| } |
| break; |
| // Unsigned comparison. |
| case Ugreater: |
| if (rt.imm64_ == 0) { |
| bgtz(rs, offset); |
| } else { |
| r2 = scratch; |
| li(r2, rt); |
| sltu(scratch, r2, rs); |
| bne(scratch, zero_reg, offset); |
| } |
| break; |
| case Ugreater_equal: |
| if (rt.imm64_ == 0) { |
| bgez(rs, offset); |
| } else if (is_int16(rt.imm64_)) { |
| sltiu(scratch, rs, rt.imm64_); |
| beq(scratch, zero_reg, offset); |
| } else { |
| r2 = scratch; |
| li(r2, rt); |
| sltu(scratch, rs, r2); |
| beq(scratch, zero_reg, offset); |
| } |
| break; |
| case Uless: |
| if (rt.imm64_ == 0) { |
| // No code needs to be emitted. |
| return; |
| } else if (is_int16(rt.imm64_)) { |
| sltiu(scratch, rs, rt.imm64_); |
| bne(scratch, zero_reg, offset); |
| } else { |
| r2 = scratch; |
| li(r2, rt); |
| sltu(scratch, rs, r2); |
| bne(scratch, zero_reg, offset); |
| } |
| break; |
| case Uless_equal: |
| if (rt.imm64_ == 0) { |
| b(offset); |
| } else { |
| r2 = scratch; |
| li(r2, rt); |
| sltu(scratch, r2, rs); |
| beq(scratch, zero_reg, offset); |
| } |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| // Emit a nop in the branch delay slot if required. |
| if (bdslot == PROTECT) |
| nop(); |
| } |
| |
| |
| void MacroAssembler::BranchShort(Label* L, BranchDelaySlot bdslot) { |
| // We use branch_offset as an argument for the branch instructions to be sure |
| // it is called just before generating the branch instruction, as needed. |
| |
| b(shifted_branch_offset(L, false)); |
| |
| // Emit a nop in the branch delay slot if required. |
| if (bdslot == PROTECT) |
| nop(); |
| } |
| |
| |
| void MacroAssembler::BranchShort(Label* L, Condition cond, Register rs, |
| const Operand& rt, |
| BranchDelaySlot bdslot) { |
| BRANCH_ARGS_CHECK(cond, rs, rt); |
| |
| int32_t offset = 0; |
| Register r2 = no_reg; |
| Register scratch = at; |
| if (rt.is_reg()) { |
| BlockTrampolinePoolScope block_trampoline_pool(this); |
| r2 = rt.rm_; |
| // Be careful to always use shifted_branch_offset only just before the |
| // branch instruction, as the location will be remember for patching the |
| // target. |
| switch (cond) { |
| case cc_always: |
| offset = shifted_branch_offset(L, false); |
| b(offset); |
| break; |
| case eq: |
| offset = shifted_branch_offset(L, false); |
| beq(rs, r2, offset); |
| break; |
| case ne: |
| offset = shifted_branch_offset(L, false); |
| bne(rs, r2, offset); |
| break; |
| // Signed comparison. |
| case greater: |
| if (r2.is(zero_reg)) { |
| offset = shifted_branch_offset(L, false); |
| bgtz(rs, offset); |
| } else { |
| slt(scratch, r2, rs); |
| offset = shifted_branch_offset(L, false); |
| bne(scratch, zero_reg, offset); |
| } |
| break; |
| case greater_equal: |
| if (r2.is(zero_reg)) { |
| offset = shifted_branch_offset(L, false); |
| bgez(rs, offset); |
| } else { |
| slt(scratch, rs, r2); |
| offset = shifted_branch_offset(L, false); |
| beq(scratch, zero_reg, offset); |
| } |
| break; |
| case less: |
| if (r2.is(zero_reg)) { |
| offset = shifted_branch_offset(L, false); |
| bltz(rs, offset); |
| } else { |
| slt(scratch, rs, r2); |
| offset = shifted_branch_offset(L, false); |
| bne(scratch, zero_reg, offset); |
| } |
| break; |
| case less_equal: |
| if (r2.is(zero_reg)) { |
| offset = shifted_branch_offset(L, false); |
| blez(rs, offset); |
| } else { |
| slt(scratch, r2, rs); |
| offset = shifted_branch_offset(L, false); |
| beq(scratch, zero_reg, offset); |
| } |
| break; |
| // Unsigned comparison. |
| case Ugreater: |
| if (r2.is(zero_reg)) { |
| offset = shifted_branch_offset(L, false); |
| bgtz(rs, offset); |
| } else { |
| sltu(scratch, r2, rs); |
| offset = shifted_branch_offset(L, false); |
| bne(scratch, zero_reg, offset); |
| } |
| break; |
| case Ugreater_equal: |
| if (r2.is(zero_reg)) { |
| offset = shifted_branch_offset(L, false); |
| bgez(rs, offset); |
| } else { |
| sltu(scratch, rs, r2); |
| offset = shifted_branch_offset(L, false); |
| beq(scratch, zero_reg, offset); |
| } |
| break; |
| case Uless: |
| if (r2.is(zero_reg)) { |
| // No code needs to be emitted. |
| return; |
| } else { |
| sltu(scratch, rs, r2); |
| offset = shifted_branch_offset(L, false); |
| bne(scratch, zero_reg, offset); |
| } |
| break; |
| case Uless_equal: |
| if (r2.is(zero_reg)) { |
| offset = shifted_branch_offset(L, false); |
| b(offset); |
| } else { |
| sltu(scratch, r2, rs); |
| offset = shifted_branch_offset(L, false); |
| beq(scratch, zero_reg, offset); |
| } |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| } else { |
| // Be careful to always use shifted_branch_offset only just before the |
| // branch instruction, as the location will be remember for patching the |
| // target. |
| BlockTrampolinePoolScope block_trampoline_pool(this); |
| switch (cond) { |
| case cc_always: |
| offset = shifted_branch_offset(L, false); |
| b(offset); |
| break; |
| case eq: |
| if (rt.imm64_ == 0) { |
| offset = shifted_branch_offset(L, false); |
| beq(rs, zero_reg, offset); |
| } else { |
| DCHECK(!scratch.is(rs)); |
| r2 = scratch; |
| li(r2, rt); |
| offset = shifted_branch_offset(L, false); |
| beq(rs, r2, offset); |
| } |
| break; |
| case ne: |
| if (rt.imm64_ == 0) { |
| offset = shifted_branch_offset(L, false); |
| bne(rs, zero_reg, offset); |
| } else { |
| DCHECK(!scratch.is(rs)); |
| r2 = scratch; |
| li(r2, rt); |
| offset = shifted_branch_offset(L, false); |
| bne(rs, r2, offset); |
| } |
| break; |
| // Signed comparison. |
| case greater: |
| if (rt.imm64_ == 0) { |
| offset = shifted_branch_offset(L, false); |
| bgtz(rs, offset); |
| } else { |
| DCHECK(!scratch.is(rs)); |
| r2 = scratch; |
| li(r2, rt); |
| slt(scratch, r2, rs); |
| offset = shifted_branch_offset(L, false); |
| bne(scratch, zero_reg, offset); |
| } |
| break; |
| case greater_equal: |
| if (rt.imm64_ == 0) { |
| offset = shifted_branch_offset(L, false); |
| bgez(rs, offset); |
| } else if (is_int16(rt.imm64_)) { |
| slti(scratch, rs, rt.imm64_); |
| offset = shifted_branch_offset(L, false); |
| beq(scratch, zero_reg, offset); |
| } else { |
| DCHECK(!scratch.is(rs)); |
| r2 = scratch; |
| li(r2, rt); |
| slt(scratch, rs, r2); |
| offset = shifted_branch_offset(L, false); |
| beq(scratch, zero_reg, offset); |
| } |
| break; |
| case less: |
| if (rt.imm64_ == 0) { |
| offset = shifted_branch_offset(L, false); |
| bltz(rs, offset); |
| } else if (is_int16(rt.imm64_)) { |
| slti(scratch, rs, rt.imm64_); |
| offset = shifted_branch_offset(L, false); |
| bne(scratch, zero_reg, offset); |
| } else { |
| DCHECK(!scratch.is(rs)); |
| r2 = scratch; |
| li(r2, rt); |
| slt(scratch, rs, r2); |
| offset = shifted_branch_offset(L, false); |
| bne(scratch, zero_reg, offset); |
| } |
| break; |
| case less_equal: |
| if (rt.imm64_ == 0) { |
| offset = shifted_branch_offset(L, false); |
| blez(rs, offset); |
| } else { |
| DCHECK(!scratch.is(rs)); |
| r2 = scratch; |
| li(r2, rt); |
| slt(scratch, r2, rs); |
| offset = shifted_branch_offset(L, false); |
| beq(scratch, zero_reg, offset); |
| } |
| break; |
| // Unsigned comparison. |
| case Ugreater: |
| if (rt.imm64_ == 0) { |
| offset = shifted_branch_offset(L, false); |
| bne(rs, zero_reg, offset); |
| } else { |
| DCHECK(!scratch.is(rs)); |
| r2 = scratch; |
| li(r2, rt); |
| sltu(scratch, r2, rs); |
| offset = shifted_branch_offset(L, false); |
| bne(scratch, zero_reg, offset); |
| } |
| break; |
| case Ugreater_equal: |
| if (rt.imm64_ == 0) { |
| offset = shifted_branch_offset(L, false); |
| bgez(rs, offset); |
| } else if (is_int16(rt.imm64_)) { |
| sltiu(scratch, rs, rt.imm64_); |
| offset = shifted_branch_offset(L, false); |
| beq(scratch, zero_reg, offset); |
| } else { |
| DCHECK(!scratch.is(rs)); |
| r2 = scratch; |
| li(r2, rt); |
| sltu(scratch, rs, r2); |
| offset = shifted_branch_offset(L, false); |
| beq(scratch, zero_reg, offset); |
| } |
| break; |
| case Uless: |
| if (rt.imm64_ == 0) { |
| // No code needs to be emitted. |
| return; |
| } else if (is_int16(rt.imm64_)) { |
| sltiu(scratch, rs, rt.imm64_); |
| offset = shifted_branch_offset(L, false); |
| bne(scratch, zero_reg, offset); |
| } else { |
| DCHECK(!scratch.is(rs)); |
| r2 = scratch; |
| li(r2, rt); |
| sltu(scratch, rs, r2); |
| offset = shifted_branch_offset(L, false); |
| bne(scratch, zero_reg, offset); |
| } |
| break; |
| case Uless_equal: |
| if (rt.imm64_ == 0) { |
| offset = shifted_branch_offset(L, false); |
| beq(rs, zero_reg, offset); |
| } else { |
| DCHECK(!scratch.is(rs)); |
| r2 = scratch; |
| li(r2, rt); |
| sltu(scratch, r2, rs); |
| offset = shifted_branch_offset(L, false); |
| beq(scratch, zero_reg, offset); |
| } |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| // Check that offset could actually hold on an int16_t. |
| DCHECK(is_int16(offset)); |
| // Emit a nop in the branch delay slot if required. |
| if (bdslot == PROTECT) |
| nop(); |
| } |
| |
| |
| void MacroAssembler::BranchAndLink(int16_t offset, BranchDelaySlot bdslot) { |
| BranchAndLinkShort(offset, bdslot); |
| } |
| |
| |
| void MacroAssembler::BranchAndLink(int16_t offset, Condition cond, Register rs, |
| const Operand& rt, |
| BranchDelaySlot bdslot) { |
| BranchAndLinkShort(offset, cond, rs, rt, bdslot); |
| } |
| |
| |
| void MacroAssembler::BranchAndLink(Label* L, BranchDelaySlot bdslot) { |
| if (L->is_bound()) { |
| if (is_near(L)) { |
| BranchAndLinkShort(L, bdslot); |
| } else { |
| Jalr(L, bdslot); |
| } |
| } else { |
| if (is_trampoline_emitted()) { |
| Jalr(L, bdslot); |
| } else { |
| BranchAndLinkShort(L, bdslot); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::BranchAndLink(Label* L, Condition cond, Register rs, |
| const Operand& rt, |
| BranchDelaySlot bdslot) { |
| if (L->is_bound()) { |
| if (is_near(L)) { |
| BranchAndLinkShort(L, cond, rs, rt, bdslot); |
| } else { |
| Label skip; |
| Condition neg_cond = NegateCondition(cond); |
| BranchShort(&skip, neg_cond, rs, rt); |
| Jalr(L, bdslot); |
| bind(&skip); |
| } |
| } else { |
| if (is_trampoline_emitted()) { |
| Label skip; |
| Condition neg_cond = NegateCondition(cond); |
| BranchShort(&skip, neg_cond, rs, rt); |
| Jalr(L, bdslot); |
| bind(&skip); |
| } else { |
| BranchAndLinkShort(L, cond, rs, rt, bdslot); |
| } |
| } |
| } |
| |
| |
| // We need to use a bgezal or bltzal, but they can't be used directly with the |
| // slt instructions. We could use sub or add instead but we would miss overflow |
| // cases, so we keep slt and add an intermediate third instruction. |
| void MacroAssembler::BranchAndLinkShort(int16_t offset, |
| BranchDelaySlot bdslot) { |
| bal(offset); |
| |
| // Emit a nop in the branch delay slot if required. |
| if (bdslot == PROTECT) |
| nop(); |
| } |
| |
| |
| void MacroAssembler::BranchAndLinkShort(int16_t offset, Condition cond, |
| Register rs, const Operand& rt, |
| BranchDelaySlot bdslot) { |
| BRANCH_ARGS_CHECK(cond, rs, rt); |
| Register r2 = no_reg; |
| Register scratch = at; |
| |
| if (rt.is_reg()) { |
| r2 = rt.rm_; |
| } else if (cond != cc_always) { |
| r2 = scratch; |
| li(r2, rt); |
| } |
| |
| { |
| BlockTrampolinePoolScope block_trampoline_pool(this); |
| switch (cond) { |
| case cc_always: |
| bal(offset); |
| break; |
| case eq: |
| bne(rs, r2, 2); |
| nop(); |
| bal(offset); |
| break; |
| case ne: |
| beq(rs, r2, 2); |
| nop(); |
| bal(offset); |
| break; |
| |
| // Signed comparison. |
| case greater: |
| // rs > rt |
| slt(scratch, r2, rs); |
| beq(scratch, zero_reg, 2); |
| nop(); |
| bal(offset); |
| break; |
| case greater_equal: |
| // rs >= rt |
| slt(scratch, rs, r2); |
| bne(scratch, zero_reg, 2); |
| nop(); |
| bal(offset); |
| break; |
| case less: |
| // rs < r2 |
| slt(scratch, rs, r2); |
| bne(scratch, zero_reg, 2); |
| nop(); |
| bal(offset); |
| break; |
| case less_equal: |
| // rs <= r2 |
| slt(scratch, r2, rs); |
| bne(scratch, zero_reg, 2); |
| nop(); |
| bal(offset); |
| break; |
| |
| |
| // Unsigned comparison. |
| case Ugreater: |
| // rs > rt |
| sltu(scratch, r2, rs); |
| beq(scratch, zero_reg, 2); |
| nop(); |
| bal(offset); |
| break; |
| case Ugreater_equal: |
| // rs >= rt |
| sltu(scratch, rs, r2); |
| bne(scratch, zero_reg, 2); |
| nop(); |
| bal(offset); |
| break; |
| case Uless: |
| // rs < r2 |
| sltu(scratch, rs, r2); |
| bne(scratch, zero_reg, 2); |
| nop(); |
| bal(offset); |
| break; |
| case Uless_equal: |
| // rs <= r2 |
| sltu(scratch, r2, rs); |
| bne(scratch, zero_reg, 2); |
| nop(); |
| bal(offset); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| // Emit a nop in the branch delay slot if required. |
| if (bdslot == PROTECT) |
| nop(); |
| } |
| |
| |
| void MacroAssembler::BranchAndLinkShort(Label* L, BranchDelaySlot bdslot) { |
| bal(shifted_branch_offset(L, false)); |
| |
| // Emit a nop in the branch delay slot if required. |
| if (bdslot == PROTECT) |
| nop(); |
| } |
| |
| |
| void MacroAssembler::BranchAndLinkShort(Label* L, Condition cond, Register rs, |
| const Operand& rt, |
| BranchDelaySlot bdslot) { |
| BRANCH_ARGS_CHECK(cond, rs, rt); |
| |
| int32_t offset = 0; |
| Register r2 = no_reg; |
| Register scratch = at; |
| if (rt.is_reg()) { |
| r2 = rt.rm_; |
| } else if (cond != cc_always) { |
| r2 = scratch; |
| li(r2, rt); |
| } |
| |
| { |
| BlockTrampolinePoolScope block_trampoline_pool(this); |
| switch (cond) { |
| case cc_always: |
| offset = shifted_branch_offset(L, false); |
| bal(offset); |
| break; |
| case eq: |
| bne(rs, r2, 2); |
| nop(); |
| offset = shifted_branch_offset(L, false); |
| bal(offset); |
| break; |
| case ne: |
| beq(rs, r2, 2); |
| nop(); |
| offset = shifted_branch_offset(L, false); |
| bal(offset); |
| break; |
| |
| // Signed comparison. |
| case greater: |
| // rs > rt |
| slt(scratch, r2, rs); |
| beq(scratch, zero_reg, 2); |
| nop(); |
| offset = shifted_branch_offset(L, false); |
| bal(offset); |
| break; |
| case greater_equal: |
| // rs >= rt |
| slt(scratch, rs, r2); |
| bne(scratch, zero_reg, 2); |
| nop(); |
| offset = shifted_branch_offset(L, false); |
| bal(offset); |
| break; |
| case less: |
| // rs < r2 |
| slt(scratch, rs, r2); |
| bne(scratch, zero_reg, 2); |
| nop(); |
| offset = shifted_branch_offset(L, false); |
| bal(offset); |
| break; |
| case less_equal: |
| // rs <= r2 |
| slt(scratch, r2, rs); |
| bne(scratch, zero_reg, 2); |
| nop(); |
| offset = shifted_branch_offset(L, false); |
| bal(offset); |
| break; |
| |
| |
| // Unsigned comparison. |
| case Ugreater: |
| // rs > rt |
| sltu(scratch, r2, rs); |
| beq(scratch, zero_reg, 2); |
| nop(); |
| offset = shifted_branch_offset(L, false); |
| bal(offset); |
| break; |
| case Ugreater_equal: |
| // rs >= rt |
| sltu(scratch, rs, r2); |
| bne(scratch, zero_reg, 2); |
| nop(); |
| offset = shifted_branch_offset(L, false); |
| bal(offset); |
| break; |
| case Uless: |
| // rs < r2 |
| sltu(scratch, rs, r2); |
| bne(scratch, zero_reg, 2); |
| nop(); |
| offset = shifted_branch_offset(L, false); |
| bal(offset); |
| break; |
| case Uless_equal: |
| // rs <= r2 |
| sltu(scratch, r2, rs); |
| bne(scratch, zero_reg, 2); |
| nop(); |
| offset = shifted_branch_offset(L, false); |
| bal(offset); |
| break; |
| |
| default: |
| UNREACHABLE(); |
| } |
| } |
| // Check that offset could actually hold on an int16_t. |
| DCHECK(is_int16(offset)); |
| |
| // Emit a nop in the branch delay slot if required. |
| if (bdslot == PROTECT) |
| nop(); |
| } |
| |
| |
| void MacroAssembler::Jump(Register target, |
| Condition cond, |
| Register rs, |
| const Operand& rt, |
| BranchDelaySlot bd) { |
| BlockTrampolinePoolScope block_trampoline_pool(this); |
| if (cond == cc_always) { |
| jr(target); |
| } else { |
| BRANCH_ARGS_CHECK(cond, rs, rt); |
| Branch(2, NegateCondition(cond), rs, rt); |
| jr(target); |
| } |
| // Emit a nop in the branch delay slot if required. |
| if (bd == PROTECT) |
| nop(); |
| } |
| |
| |
| void MacroAssembler::Jump(intptr_t target, |
| RelocInfo::Mode rmode, |
| Condition cond, |
| Register rs, |
| const Operand& rt, |
| BranchDelaySlot bd) { |
| Label skip; |
| if (cond != cc_always) { |
| Branch(USE_DELAY_SLOT, &skip, NegateCondition(cond), rs, rt); |
| } |
| // The first instruction of 'li' may be placed in the delay slot. |
| // This is not an issue, t9 is expected to be clobbered anyway. |
| li(t9, Operand(target, rmode)); |
| Jump(t9, al, zero_reg, Operand(zero_reg), bd); |
| bind(&skip); |
| } |
| |
| |
| void MacroAssembler::Jump(Address target, |
| RelocInfo::Mode rmode, |
| Condition cond, |
| Register rs, |
| const Operand& rt, |
| BranchDelaySlot bd) { |
| DCHECK(!RelocInfo::IsCodeTarget(rmode)); |
| Jump(reinterpret_cast<intptr_t>(target), rmode, cond, rs, rt, bd); |
| } |
| |
| |
| void MacroAssembler::Jump(Handle<Code> code, |
| RelocInfo::Mode rmode, |
| Condition cond, |
| Register rs, |
| const Operand& rt, |
| BranchDelaySlot bd) { |
| DCHECK(RelocInfo::IsCodeTarget(rmode)); |
| AllowDeferredHandleDereference embedding_raw_address; |
| Jump(reinterpret_cast<intptr_t>(code.location()), rmode, cond, rs, rt, bd); |
| } |
| |
| |
| int MacroAssembler::CallSize(Register target, |
| Condition cond, |
| Register rs, |
| const Operand& rt, |
| BranchDelaySlot bd) { |
| int size = 0; |
| |
| if (cond == cc_always) { |
| size += 1; |
| } else { |
| size += 3; |
| } |
| |
| if (bd == PROTECT) |
| size += 1; |
| |
| return size * kInstrSize; |
| } |
| |
| |
| // Note: To call gcc-compiled C code on mips, you must call thru t9. |
| void MacroAssembler::Call(Register target, |
| Condition cond, |
| Register rs, |
| const Operand& rt, |
| BranchDelaySlot bd) { |
| BlockTrampolinePoolScope block_trampoline_pool(this); |
| Label start; |
| bind(&start); |
| if (cond == cc_always) { |
| jalr(target); |
| } else { |
| BRANCH_ARGS_CHECK(cond, rs, rt); |
| Branch(2, NegateCondition(cond), rs, rt); |
| jalr(target); |
| } |
| // Emit a nop in the branch delay slot if required. |
| if (bd == PROTECT) |
| nop(); |
| |
| DCHECK_EQ(CallSize(target, cond, rs, rt, bd), |
| SizeOfCodeGeneratedSince(&start)); |
| } |
| |
| |
| int MacroAssembler::CallSize(Address target, |
| RelocInfo::Mode rmode, |
| Condition cond, |
| Register rs, |
| const Operand& rt, |
| BranchDelaySlot bd) { |
| int size = CallSize(t9, cond, rs, rt, bd); |
| return size + 4 * kInstrSize; |
| } |
| |
| |
| void MacroAssembler::Call(Address target, |
| RelocInfo::Mode rmode, |
| Condition cond, |
| Register rs, |
| const Operand& rt, |
| BranchDelaySlot bd) { |
| BlockTrampolinePoolScope block_trampoline_pool(this); |
| Label start; |
| bind(&start); |
| int64_t target_int = reinterpret_cast<int64_t>(target); |
| // Must record previous source positions before the |
| // li() generates a new code target. |
| positions_recorder()->WriteRecordedPositions(); |
| li(t9, Operand(target_int, rmode), ADDRESS_LOAD); |
| Call(t9, cond, rs, rt, bd); |
| DCHECK_EQ(CallSize(target, rmode, cond, rs, rt, bd), |
| SizeOfCodeGeneratedSince(&start)); |
| } |
| |
| |
| int MacroAssembler::CallSize(Handle<Code> code, |
| RelocInfo::Mode rmode, |
| TypeFeedbackId ast_id, |
| Condition cond, |
| Register rs, |
| const Operand& rt, |
| BranchDelaySlot bd) { |
| AllowDeferredHandleDereference using_raw_address; |
| return CallSize(reinterpret_cast<Address>(code.location()), |
| rmode, cond, rs, rt, bd); |
| } |
| |
| |
| void MacroAssembler::Call(Handle<Code> code, |
| RelocInfo::Mode rmode, |
| TypeFeedbackId ast_id, |
| Condition cond, |
| Register rs, |
| const Operand& rt, |
| BranchDelaySlot bd) { |
| BlockTrampolinePoolScope block_trampoline_pool(this); |
| Label start; |
| bind(&start); |
| DCHECK(RelocInfo::IsCodeTarget(rmode)); |
| if (rmode == RelocInfo::CODE_TARGET && !ast_id.IsNone()) { |
| SetRecordedAstId(ast_id); |
| rmode = RelocInfo::CODE_TARGET_WITH_ID; |
| } |
| AllowDeferredHandleDereference embedding_raw_address; |
| Call(reinterpret_cast<Address>(code.location()), rmode, cond, rs, rt, bd); |
| DCHECK_EQ(CallSize(code, rmode, ast_id, cond, rs, rt, bd), |
| SizeOfCodeGeneratedSince(&start)); |
| } |
| |
| |
| void MacroAssembler::Ret(Condition cond, |
| Register rs, |
| const Operand& rt, |
| BranchDelaySlot bd) { |
| Jump(ra, cond, rs, rt, bd); |
| } |
| |
| |
| void MacroAssembler::J(Label* L, BranchDelaySlot bdslot) { |
| BlockTrampolinePoolScope block_trampoline_pool(this); |
| |
| uint64_t imm28; |
| imm28 = jump_address(L); |
| imm28 &= kImm28Mask; |
| { BlockGrowBufferScope block_buf_growth(this); |
| // Buffer growth (and relocation) must be blocked for internal references |
| // until associated instructions are emitted and available to be patched. |
| RecordRelocInfo(RelocInfo::INTERNAL_REFERENCE); |
| j(imm28); |
| } |
| // Emit a nop in the branch delay slot if required. |
| if (bdslot == PROTECT) |
| nop(); |
| } |
| |
| |
| void MacroAssembler::Jr(Label* L, BranchDelaySlot bdslot) { |
| BlockTrampolinePoolScope block_trampoline_pool(this); |
| |
| uint64_t imm64; |
| imm64 = jump_address(L); |
| { BlockGrowBufferScope block_buf_growth(this); |
| // Buffer growth (and relocation) must be blocked for internal references |
| // until associated instructions are emitted and available to be patched. |
| RecordRelocInfo(RelocInfo::INTERNAL_REFERENCE); |
| li(at, Operand(imm64), ADDRESS_LOAD); |
| } |
| jr(at); |
| |
| // Emit a nop in the branch delay slot if required. |
| if (bdslot == PROTECT) |
| nop(); |
| } |
| |
| |
| void MacroAssembler::Jalr(Label* L, BranchDelaySlot bdslot) { |
| BlockTrampolinePoolScope block_trampoline_pool(this); |
| |
| uint64_t imm64; |
| imm64 = jump_address(L); |
| { BlockGrowBufferScope block_buf_growth(this); |
| // Buffer growth (and relocation) must be blocked for internal references |
| // until associated instructions are emitted and available to be patched. |
| RecordRelocInfo(RelocInfo::INTERNAL_REFERENCE); |
| li(at, Operand(imm64), ADDRESS_LOAD); |
| } |
| jalr(at); |
| |
| // Emit a nop in the branch delay slot if required. |
| if (bdslot == PROTECT) |
| nop(); |
| } |
| |
| |
| void MacroAssembler::DropAndRet(int drop) { |
| Ret(USE_DELAY_SLOT); |
| daddiu(sp, sp, drop * kPointerSize); |
| } |
| |
| void MacroAssembler::DropAndRet(int drop, |
| Condition cond, |
| Register r1, |
| const Operand& r2) { |
| // Both Drop and Ret need to be conditional. |
| Label skip; |
| if (cond != cc_always) { |
| Branch(&skip, NegateCondition(cond), r1, r2); |
| } |
| |
| Drop(drop); |
| Ret(); |
| |
| if (cond != cc_always) { |
| bind(&skip); |
| } |
| } |
| |
| |
| void MacroAssembler::Drop(int count, |
| Condition cond, |
| Register reg, |
| const Operand& op) { |
| if (count <= 0) { |
| return; |
| } |
| |
| Label skip; |
| |
| if (cond != al) { |
| Branch(&skip, NegateCondition(cond), reg, op); |
| } |
| |
| daddiu(sp, sp, count * kPointerSize); |
| |
| if (cond != al) { |
| bind(&skip); |
| } |
| } |
| |
| |
| |
| void MacroAssembler::Swap(Register reg1, |
| Register reg2, |
| Register scratch) { |
| if (scratch.is(no_reg)) { |
| Xor(reg1, reg1, Operand(reg2)); |
| Xor(reg2, reg2, Operand(reg1)); |
| Xor(reg1, reg1, Operand(reg2)); |
| } else { |
| mov(scratch, reg1); |
| mov(reg1, reg2); |
| mov(reg2, scratch); |
| } |
| } |
| |
| |
| void MacroAssembler::Call(Label* target) { |
| BranchAndLink(target); |
| } |
| |
| |
| void MacroAssembler::Push(Handle<Object> handle) { |
| li(at, Operand(handle)); |
| push(at); |
| } |
| |
| |
| void MacroAssembler::PushRegisterAsTwoSmis(Register src, Register scratch) { |
| DCHECK(!src.is(scratch)); |
| mov(scratch, src); |
| dsrl32(src, src, 0); |
| dsll32(src, src, 0); |
| push(src); |
| dsll32(scratch, scratch, 0); |
| push(scratch); |
| } |
| |
| |
| void MacroAssembler::PopRegisterAsTwoSmis(Register dst, Register scratch) { |
| DCHECK(!dst.is(scratch)); |
| pop(scratch); |
| dsrl32(scratch, scratch, 0); |
| pop(dst); |
| dsrl32(dst, dst, 0); |
| dsll32(dst, dst, 0); |
| or_(dst, dst, scratch); |
| } |
| |
| |
| void MacroAssembler::DebugBreak() { |
| PrepareCEntryArgs(0); |
| PrepareCEntryFunction(ExternalReference(Runtime::kDebugBreak, isolate())); |
| CEntryStub ces(isolate(), 1); |
| DCHECK(AllowThisStubCall(&ces)); |
| Call(ces.GetCode(), RelocInfo::DEBUG_BREAK); |
| } |
| |
| |
| // --------------------------------------------------------------------------- |
| // Exception handling. |
| |
| 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 a0-a3 and s0. |
| // a5-a7 are available. We will build up the handler from the bottom by |
| // pushing on the stack. |
| // Set up the code object (a5) and the state (a6) for pushing. |
| unsigned state = |
| StackHandler::IndexField::encode(handler_index) | |
| StackHandler::KindField::encode(kind); |
| li(a5, Operand(CodeObject()), CONSTANT_SIZE); |
| li(a6, Operand(state)); |
| |
| // Push the frame pointer, context, state, and code object. |
| if (kind == StackHandler::JS_ENTRY) { |
| DCHECK_EQ(Smi::FromInt(0), 0); |
| // The second zero_reg indicates no context. |
| // The first zero_reg is the NULL frame pointer. |
| // The operands are reversed to match the order of MultiPush/Pop. |
| Push(zero_reg, zero_reg, a6, a5); |
| } else { |
| MultiPush(a5.bit() | a6.bit() | cp.bit() | fp.bit()); |
| } |
| |
| // Link the current handler as the next handler. |
| li(a6, Operand(ExternalReference(Isolate::kHandlerAddress, isolate()))); |
| ld(a5, MemOperand(a6)); |
| push(a5); |
| // Set this new handler as the current one. |
| sd(sp, MemOperand(a6)); |
| } |
| |
| |
| void MacroAssembler::PopTryHandler() { |
| STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0); |
| pop(a1); |
| Daddu(sp, sp, Operand(StackHandlerConstants::kSize - kPointerSize)); |
| li(at, Operand(ExternalReference(Isolate::kHandlerAddress, isolate()))); |
| sd(a1, MemOperand(at)); |
| } |
| |
| |
| void MacroAssembler::JumpToHandlerEntry() { |
| // Compute the handler entry address and jump to it. The handler table is |
| // a fixed array of (smi-tagged) code offsets. |
| // v0 = exception, a1 = code object, a2 = state. |
| ld(a3, FieldMemOperand(a1, Code::kHandlerTableOffset)); |
| Daddu(a3, a3, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| dsrl(a2, a2, StackHandler::kKindWidth); // Handler index. |
| dsll(a2, a2, kPointerSizeLog2); |
| Daddu(a2, a3, a2); |
| ld(a2, MemOperand(a2)); // Smi-tagged offset. |
| Daddu(a1, a1, Operand(Code::kHeaderSize - kHeapObjectTag)); // Code start. |
| dsra32(t9, a2, 0); |
| Daddu(t9, t9, a1); |
| Jump(t9); // Jump. |
| } |
| |
| |
| 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); |
| |
| // The exception is expected in v0. |
| Move(v0, value); |
| |
| // Drop the stack pointer to the top of the top handler. |
| li(a3, Operand(ExternalReference(Isolate::kHandlerAddress, |
| isolate()))); |
| ld(sp, MemOperand(a3)); |
| |
| // Restore the next handler. |
| pop(a2); |
| sd(a2, MemOperand(a3)); |
| |
| // Get the code object (a1) and state (a2). Restore the context and frame |
| // pointer. |
| MultiPop(a1.bit() | a2.bit() | cp.bit() | fp.bit()); |
| |
| // 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. |
| Label done; |
| Branch(&done, eq, cp, Operand(zero_reg)); |
| sd(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| bind(&done); |
| |
| 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 v0. |
| if (!value.is(v0)) { |
| mov(v0, value); |
| } |
| // Drop the stack pointer to the top of the top stack handler. |
| li(a3, Operand(ExternalReference(Isolate::kHandlerAddress, isolate()))); |
| ld(sp, MemOperand(a3)); |
| |
| // Unwind the handlers until the ENTRY handler is found. |
| Label fetch_next, check_kind; |
| jmp(&check_kind); |
| bind(&fetch_next); |
| ld(sp, MemOperand(sp, StackHandlerConstants::kNextOffset)); |
| |
| bind(&check_kind); |
| STATIC_ASSERT(StackHandler::JS_ENTRY == 0); |
| ld(a2, MemOperand(sp, StackHandlerConstants::kStateOffset)); |
| And(a2, a2, Operand(StackHandler::KindField::kMask)); |
| Branch(&fetch_next, ne, a2, Operand(zero_reg)); |
| |
| // Set the top handler address to next handler past the top ENTRY handler. |
| pop(a2); |
| sd(a2, MemOperand(a3)); |
| |
| // Get the code object (a1) and state (a2). Clear the context and frame |
| // pointer (0 was saved in the handler). |
| MultiPop(a1.bit() | a2.bit() | cp.bit() | fp.bit()); |
| |
| JumpToHandlerEntry(); |
| } |
| |
| |
| 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, 0x7091); |
| li(scratch1, 0x7191); |
| li(scratch2, 0x7291); |
| } |
| jmp(gc_required); |
| return; |
| } |
| |
| DCHECK(!result.is(scratch1)); |
| DCHECK(!result.is(scratch2)); |
| DCHECK(!scratch1.is(scratch2)); |
| DCHECK(!scratch1.is(t9)); |
| DCHECK(!scratch2.is(t9)); |
| DCHECK(!result.is(t9)); |
| |
| // Make object size into bytes. |
| if ((flags & SIZE_IN_WORDS) != 0) { |
| object_size *= kPointerSize; |
| } |
| DCHECK(0 == (object_size & kObjectAlignmentMask)); |
| |
| // Check relative positions of allocation top and limit addresses. |
| // ARM adds additional checks to make sure the ldm instruction can be |
| // used. On MIPS we don't have ldm so we don't need additional checks either. |
| 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 and object size registers. |
| Register topaddr = scratch1; |
| li(topaddr, Operand(allocation_top)); |
| |
| // This code stores a temporary value in t9. |
| if ((flags & RESULT_CONTAINS_TOP) == 0) { |
| // Load allocation top into result and allocation limit into t9. |
| ld(result, MemOperand(topaddr)); |
| ld(t9, MemOperand(topaddr, kPointerSize)); |
| } else { |
| if (emit_debug_code()) { |
| // Assert that result actually contains top on entry. t9 is used |
| // immediately below so this use of t9 does not cause difference with |
| // respect to register content between debug and release mode. |
| ld(t9, MemOperand(topaddr)); |
| Check(eq, kUnexpectedAllocationTop, result, Operand(t9)); |
| } |
| // Load allocation limit into t9. Result already contains allocation top. |
| ld(t9, MemOperand(topaddr, limit - top)); |
| } |
| |
| DCHECK(kPointerSize == kDoubleSize); |
| if (emit_debug_code()) { |
| And(at, result, Operand(kDoubleAlignmentMask)); |
| Check(eq, kAllocationIsNotDoubleAligned, at, Operand(zero_reg)); |
| } |
| |
| // Calculate new top and bail out if new space is exhausted. Use result |
| // to calculate the new top. |
| Daddu(scratch2, result, Operand(object_size)); |
| Branch(gc_required, Ugreater, scratch2, Operand(t9)); |
| sd(scratch2, MemOperand(topaddr)); |
| |
| // Tag object if requested. |
| if ((flags & TAG_OBJECT) != 0) { |
| Daddu(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, 0x7091); |
| li(scratch1, 0x7191); |
| li(scratch2, 0x7291); |
| } |
| jmp(gc_required); |
| return; |
| } |
| |
| DCHECK(!result.is(scratch1)); |
| DCHECK(!result.is(scratch2)); |
| DCHECK(!scratch1.is(scratch2)); |
| DCHECK(!object_size.is(t9)); |
| DCHECK(!scratch1.is(t9) && !scratch2.is(t9) && !result.is(t9)); |
| |
| // Check relative positions of allocation top and limit addresses. |
| // ARM adds additional checks to make sure the ldm instruction can be |
| // used. On MIPS we don't have ldm so we don't need additional checks either. |
| 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 and object size registers. |
| Register topaddr = scratch1; |
| li(topaddr, Operand(allocation_top)); |
| |
| // This code stores a temporary value in t9. |
| if ((flags & RESULT_CONTAINS_TOP) == 0) { |
| // Load allocation top into result and allocation limit into t9. |
| ld(result, MemOperand(topaddr)); |
| ld(t9, MemOperand(topaddr, kPointerSize)); |
| } else { |
| if (emit_debug_code()) { |
| // Assert that result actually contains top on entry. t9 is used |
| // immediately below so this use of t9 does not cause difference with |
| // respect to register content between debug and release mode. |
| ld(t9, MemOperand(topaddr)); |
| Check(eq, kUnexpectedAllocationTop, result, Operand(t9)); |
| } |
| // Load allocation limit into t9. Result already contains allocation top. |
| ld(t9, MemOperand(topaddr, limit - top)); |
| } |
| |
| DCHECK(kPointerSize == kDoubleSize); |
| if (emit_debug_code()) { |
| And(at, result, Operand(kDoubleAlignmentMask)); |
| Check(eq, kAllocationIsNotDoubleAligned, at, Operand(zero_reg)); |
| } |
| |
| // 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. |
| if ((flags & SIZE_IN_WORDS) != 0) { |
| dsll(scratch2, object_size, kPointerSizeLog2); |
| Daddu(scratch2, result, scratch2); |
| } else { |
| Daddu(scratch2, result, Operand(object_size)); |
| } |
| Branch(gc_required, Ugreater, scratch2, Operand(t9)); |
| |
| // Update allocation top. result temporarily holds the new top. |
| if (emit_debug_code()) { |
| And(t9, scratch2, Operand(kObjectAlignmentMask)); |
| Check(eq, kUnalignedAllocationInNewSpace, t9, Operand(zero_reg)); |
| } |
| sd(scratch2, MemOperand(topaddr)); |
| |
| // Tag object if requested. |
| if ((flags & TAG_OBJECT) != 0) { |
| Daddu(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. |
| And(object, object, Operand(~kHeapObjectTagMask)); |
| #ifdef DEBUG |
| // Check that the object un-allocated is below the current top. |
| li(scratch, Operand(new_space_allocation_top)); |
| ld(scratch, MemOperand(scratch)); |
| Check(less, kUndoAllocationOfNonAllocatedMemory, |
| object, Operand(scratch)); |
| #endif |
| // Write the address of the object to un-allocate as the current top. |
| li(scratch, Operand(new_space_allocation_top)); |
| sd(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); |
| dsll(scratch1, length, 1); // Length in bytes, not chars. |
| daddiu(scratch1, scratch1, |
| kObjectAlignmentMask + SeqTwoByteString::kHeaderSize); |
| And(scratch1, scratch1, Operand(~kObjectAlignmentMask)); |
| |
| // 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); |
| daddiu(scratch1, length, |
| kObjectAlignmentMask + SeqOneByteString::kHeaderSize); |
| And(scratch1, scratch1, Operand(~kObjectAlignmentMask)); |
| |
| // 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::JumpIfNotUniqueNameInstanceType(Register reg, |
| Label* not_unique_name) { |
| STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
| Label succeed; |
| And(at, reg, Operand(kIsNotStringMask | kIsNotInternalizedMask)); |
| Branch(&succeed, eq, at, Operand(zero_reg)); |
| Branch(not_unique_name, ne, reg, Operand(SYMBOL_TYPE)); |
| |
| bind(&succeed); |
| } |
| |
| |
| // Allocates a heap number or jumps to the 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* need_gc, |
| 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, need_gc, |
| 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) { |
| sd(heap_number_map, FieldMemOperand(result, HeapObject::kMapOffset)); |
| } else { |
| sd(heap_number_map, MemOperand(result, HeapObject::kMapOffset)); |
| } |
| } |
| |
| |
| void MacroAssembler::AllocateHeapNumberWithValue(Register result, |
| FPURegister value, |
| Register scratch1, |
| Register scratch2, |
| Label* gc_required) { |
| LoadRoot(t8, Heap::kHeapNumberMapRootIndex); |
| AllocateHeapNumber(result, scratch1, scratch2, t8, gc_required); |
| sdc1(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) { |
| 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 < kNumRegisters; i++) { |
| if ((temps & (1 << i)) != 0) { |
| tmp.code_ = i; |
| break; |
| } |
| } |
| DCHECK(!tmp.is(no_reg)); |
| |
| for (int i = 0; i < field_count; i++) { |
| ld(tmp, FieldMemOperand(src, i * kPointerSize)); |
| sd(tmp, FieldMemOperand(dst, i * kPointerSize)); |
| } |
| } |
| |
| |
| void MacroAssembler::CopyBytes(Register src, |
| Register dst, |
| Register length, |
| Register scratch) { |
| Label align_loop_1, word_loop, byte_loop, byte_loop_1, done; |
| |
| // Align src before copying in word size chunks. |
| Branch(&byte_loop, le, length, Operand(kPointerSize)); |
| bind(&align_loop_1); |
| And(scratch, src, kPointerSize - 1); |
| Branch(&word_loop, eq, scratch, Operand(zero_reg)); |
| lbu(scratch, MemOperand(src)); |
| Daddu(src, src, 1); |
| sb(scratch, MemOperand(dst)); |
| Daddu(dst, dst, 1); |
| Dsubu(length, length, Operand(1)); |
| Branch(&align_loop_1, ne, length, Operand(zero_reg)); |
| |
| // Copy bytes in word size chunks. |
| bind(&word_loop); |
| if (emit_debug_code()) { |
| And(scratch, src, kPointerSize - 1); |
| Assert(eq, kExpectingAlignmentForCopyBytes, |
| scratch, Operand(zero_reg)); |
| } |
| Branch(&byte_loop, lt, length, Operand(kPointerSize)); |
| ld(scratch, MemOperand(src)); |
| Daddu(src, src, kPointerSize); |
| |
| // TODO(kalmard) check if this can be optimized to use sw in most cases. |
| // Can't use unaligned access - copy byte by byte. |
| sb(scratch, MemOperand(dst, 0)); |
| dsrl(scratch, scratch, 8); |
| sb(scratch, MemOperand(dst, 1)); |
| dsrl(scratch, scratch, 8); |
| sb(scratch, MemOperand(dst, 2)); |
| dsrl(scratch, scratch, 8); |
| sb(scratch, MemOperand(dst, 3)); |
| dsrl(scratch, scratch, 8); |
| sb(scratch, MemOperand(dst, 4)); |
| dsrl(scratch, scratch, 8); |
| sb(scratch, MemOperand(dst, 5)); |
| dsrl(scratch, scratch, 8); |
| sb(scratch, MemOperand(dst, 6)); |
| dsrl(scratch, scratch, 8); |
| sb(scratch, MemOperand(dst, 7)); |
| Daddu(dst, dst, 8); |
| |
| Dsubu(length, length, Operand(kPointerSize)); |
| Branch(&word_loop); |
| |
| // Copy the last bytes if any left. |
| bind(&byte_loop); |
| Branch(&done, eq, length, Operand(zero_reg)); |
| bind(&byte_loop_1); |
| lbu(scratch, MemOperand(src)); |
| Daddu(src, src, 1); |
| sb(scratch, MemOperand(dst)); |
| Daddu(dst, dst, 1); |
| Dsubu(length, length, Operand(1)); |
| Branch(&byte_loop_1, ne, length, Operand(zero_reg)); |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::InitializeFieldsWithFiller(Register start_offset, |
| Register end_offset, |
| Register filler) { |
| Label loop, entry; |
| Branch(&entry); |
| bind(&loop); |
| sd(filler, MemOperand(start_offset)); |
| Daddu(start_offset, start_offset, kPointerSize); |
| bind(&entry); |
| Branch(&loop, lt, start_offset, Operand(end_offset)); |
| } |
| |
| |
| 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); |
| lbu(scratch, FieldMemOperand(map, Map::kBitField2Offset)); |
| Branch(fail, hi, scratch, |
| Operand(Map::kMaximumBitField2FastHoleyElementValue)); |
| } |
| |
| |
| 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); |
| lbu(scratch, FieldMemOperand(map, Map::kBitField2Offset)); |
| Branch(fail, ls, scratch, |
| Operand(Map::kMaximumBitField2FastHoleySmiElementValue)); |
| Branch(fail, hi, scratch, |
| Operand(Map::kMaximumBitField2FastHoleyElementValue)); |
| } |
| |
| |
| void MacroAssembler::CheckFastSmiElements(Register map, |
| Register scratch, |
| Label* fail) { |
| STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| lbu(scratch, FieldMemOperand(map, Map::kBitField2Offset)); |
| Branch(fail, hi, scratch, |
| Operand(Map::kMaximumBitField2FastHoleySmiElementValue)); |
| } |
| |
| |
| void MacroAssembler::StoreNumberToDoubleElements(Register value_reg, |
| Register key_reg, |
| Register elements_reg, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| Label* fail, |
| int elements_offset) { |
| Label smi_value, maybe_nan, have_double_value, is_nan, done; |
| Register mantissa_reg = scratch2; |
| Register exponent_reg = scratch3; |
| |
| // Handle smi values specially. |
| JumpIfSmi(value_reg, &smi_value); |
| |
| // Ensure that the object is a heap number |
| CheckMap(value_reg, |
| scratch1, |
| Heap::kHeapNumberMapRootIndex, |
| fail, |
| DONT_DO_SMI_CHECK); |
| |
| // Check for nan: all NaN values have a value greater (signed) than 0x7ff00000 |
| // in the exponent. |
| li(scratch1, Operand(kNaNOrInfinityLowerBoundUpper32)); |
| lw(exponent_reg, FieldMemOperand(value_reg, HeapNumber::kExponentOffset)); |
| Branch(&maybe_nan, ge, exponent_reg, Operand(scratch1)); |
| |
| lwu(mantissa_reg, FieldMemOperand(value_reg, HeapNumber::kMantissaOffset)); |
| |
| bind(&have_double_value); |
| // dsll(scratch1, key_reg, kDoubleSizeLog2 - kSmiTagSize); |
| dsra(scratch1, key_reg, 32 - kDoubleSizeLog2); |
| Daddu(scratch1, scratch1, elements_reg); |
| sw(mantissa_reg, FieldMemOperand( |
| scratch1, FixedDoubleArray::kHeaderSize - elements_offset)); |
| uint32_t offset = FixedDoubleArray::kHeaderSize - elements_offset + |
| sizeof(kHoleNanLower32); |
| sw(exponent_reg, FieldMemOperand(scratch1, offset)); |
| jmp(&done); |
| |
| bind(&maybe_nan); |
| // Could be NaN, Infinity or -Infinity. If fraction is not zero, it's NaN, |
| // otherwise it's Infinity or -Infinity, and the non-NaN code path applies. |
| lw(mantissa_reg, FieldMemOperand(value_reg, HeapNumber::kMantissaOffset)); |
| Branch(&have_double_value, eq, mantissa_reg, Operand(zero_reg)); |
| bind(&is_nan); |
| // Load canonical NaN for storing into the double array. |
| LoadRoot(at, Heap::kNanValueRootIndex); |
| lw(mantissa_reg, FieldMemOperand(at, HeapNumber::kMantissaOffset)); |
| lw(exponent_reg, FieldMemOperand(at, HeapNumber::kExponentOffset)); |
| jmp(&have_double_value); |
| |
| bind(&smi_value); |
| Daddu(scratch1, elements_reg, |
| Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag - |
| elements_offset)); |
| // dsll(scratch2, key_reg, kDoubleSizeLog2 - kSmiTagSize); |
| dsra(scratch2, key_reg, 32 - kDoubleSizeLog2); |
| Daddu(scratch1, scratch1, scratch2); |
| // scratch1 is now effective address of the double element |
| |
| Register untagged_value = elements_reg; |
| SmiUntag(untagged_value, value_reg); |
| mtc1(untagged_value, f2); |
| cvt_d_w(f0, f2); |
| sdc1(f0, MemOperand(scratch1, 0)); |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::CompareMapAndBranch(Register obj, |
| Register scratch, |
| Handle<Map> map, |
| Label* early_success, |
| Condition cond, |
| Label* branch_to) { |
| ld(scratch, FieldMemOperand(obj, HeapObject::kMapOffset)); |
| CompareMapAndBranch(scratch, map, early_success, cond, branch_to); |
| } |
| |
| |
| void MacroAssembler::CompareMapAndBranch(Register obj_map, |
| Handle<Map> map, |
| Label* early_success, |
| Condition cond, |
| Label* branch_to) { |
| Branch(branch_to, cond, obj_map, Operand(map)); |
| } |
| |
| |
| 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; |
| CompareMapAndBranch(obj, scratch, map, &success, ne, fail); |
| bind(&success); |
| } |
| |
| |
| void MacroAssembler::DispatchWeakMap(Register obj, Register scratch1, |
| Register scratch2, Handle<WeakCell> cell, |
| Handle<Code> success, |
| SmiCheckType smi_check_type) { |
| Label fail; |
| if (smi_check_type == DO_SMI_CHECK) { |
| JumpIfSmi(obj, &fail); |
| } |
| ld(scratch1, FieldMemOperand(obj, HeapObject::kMapOffset)); |
| GetWeakValue(scratch2, cell); |
| Jump(success, RelocInfo::CODE_TARGET, eq, scratch1, Operand(scratch2)); |
| bind(&fail); |
| } |
| |
| |
| 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); |
| } |
| ld(scratch, FieldMemOperand(obj, HeapObject::kMapOffset)); |
| LoadRoot(at, index); |
| Branch(fail, ne, scratch, Operand(at)); |
| } |
| |
| |
| void MacroAssembler::GetWeakValue(Register value, Handle<WeakCell> cell) { |
| li(value, Operand(cell)); |
| ld(value, FieldMemOperand(value, WeakCell::kValueOffset)); |
| } |
| |
| |
| void MacroAssembler::LoadWeakValue(Register value, Handle<WeakCell> cell, |
| Label* miss) { |
| GetWeakValue(value, cell); |
| JumpIfSmi(value, miss); |
| } |
| |
| |
| void MacroAssembler::MovFromFloatResult(const DoubleRegister dst) { |
| if (IsMipsSoftFloatABI) { |
| Move(dst, v0, v1); |
| } else { |
| Move(dst, f0); // Reg f0 is o32 ABI FP return value. |
| } |
| } |
| |
| |
| void MacroAssembler::MovFromFloatParameter(const DoubleRegister dst) { |
| if (IsMipsSoftFloatABI) { |
| Move(dst, a0, a1); |
| } else { |
| Move(dst, f12); // Reg f12 is o32 ABI FP first argument value. |
| } |
| } |
| |
| |
| void MacroAssembler::MovToFloatParameter(DoubleRegister src) { |
| if (!IsMipsSoftFloatABI) { |
| Move(f12, src); |
| } else { |
| Move(a0, a1, src); |
| } |
| } |
| |
| |
| void MacroAssembler::MovToFloatResult(DoubleRegister src) { |
| if (!IsMipsSoftFloatABI) { |
| Move(f0, src); |
| } else { |
| Move(v0, v1, src); |
| } |
| } |
| |
| |
| void MacroAssembler::MovToFloatParameters(DoubleRegister src1, |
| DoubleRegister src2) { |
| if (!IsMipsSoftFloatABI) { |
| const DoubleRegister fparg2 = (kMipsAbi == kN64) ? f13 : f14; |
| if (src2.is(f12)) { |
| DCHECK(!src1.is(fparg2)); |
| Move(fparg2, src2); |
| Move(f12, src1); |
| } else { |
| Move(f12, src1); |
| Move(fparg2, src2); |
| } |
| } else { |
| Move(a0, a1, src1); |
| Move(a2, a3, src2); |
| } |
| } |
| |
| |
| // ----------------------------------------------------------------------------- |
| // JavaScript invokes. |
| |
| 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: |
| // a0: actual arguments count |
| // a1: function (passed through to callee) |
| // a2: 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. |
| DCHECK(actual.is_immediate() || actual.reg().is(a0)); |
| DCHECK(expected.is_immediate() || expected.reg().is(a2)); |
| DCHECK((!code_constant.is_null() && code_reg.is(no_reg)) || code_reg.is(a3)); |
| |
| if (expected.is_immediate()) { |
| DCHECK(actual.is_immediate()); |
| if (expected.immediate() == actual.immediate()) { |
| definitely_matches = true; |
| } else { |
| li(a0, 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; |
| li(a2, Operand(expected.immediate())); |
| } |
| } |
| } else if (actual.is_immediate()) { |
| Branch(®ular_invoke, eq, expected.reg(), Operand(actual.immediate())); |
| li(a0, Operand(actual.immediate())); |
| } else { |
| Branch(®ular_invoke, eq, expected.reg(), Operand(actual.reg())); |
| } |
| |
| if (!definitely_matches) { |
| if (!code_constant.is_null()) { |
| li(a3, Operand(code_constant)); |
| daddiu(a3, a3, 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) { |
| Branch(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)); |
| Call(code); |
| call_wrapper.AfterCall(); |
| } else { |
| DCHECK(flag == JUMP_FUNCTION); |
| Jump(code); |
| } |
| // Continue here if InvokePrologue does handle the invocation due to |
| // mismatched parameter counts. |
| bind(&done); |
| } |
| } |
| |
| |
| void MacroAssembler::InvokeFunction(Register function, |
| 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 a1. |
| DCHECK(function.is(a1)); |
| Register expected_reg = a2; |
| Register code_reg = a3; |
| ld(code_reg, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset)); |
| ld(cp, FieldMemOperand(a1, JSFunction::kContextOffset)); |
| // The argument count is stored as int32_t on 64-bit platforms. |
| // TODO(plind): Smi on 32-bit platforms. |
| lw(expected_reg, |
| FieldMemOperand(code_reg, |
| SharedFunctionInfo::kFormalParameterCountOffset)); |
| ld(code_reg, FieldMemOperand(a1, 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 a1. |
| DCHECK(function.is(a1)); |
| |
| // Get the function and setup the context. |
| ld(cp, FieldMemOperand(a1, 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. |
| ld(a3, FieldMemOperand(a1, JSFunction::kCodeEntryOffset)); |
| InvokeCode(a3, expected, actual, flag, call_wrapper); |
| } |
| |
| |
| void MacroAssembler::InvokeFunction(Handle<JSFunction> function, |
| const ParameterCount& expected, |
| const ParameterCount& actual, |
| InvokeFlag flag, |
| const CallWrapper& call_wrapper) { |
| li(a1, function); |
| InvokeFunction(a1, expected, actual, flag, call_wrapper); |
| } |
| |
| |
| void MacroAssembler::IsObjectJSObjectType(Register heap_object, |
| Register map, |
| Register scratch, |
| Label* fail) { |
| ld(map, FieldMemOperand(heap_object, HeapObject::kMapOffset)); |
| IsInstanceJSObjectType(map, scratch, fail); |
| } |
| |
| |
| void MacroAssembler::IsInstanceJSObjectType(Register map, |
| Register scratch, |
| Label* fail) { |
| lbu(scratch, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| Branch(fail, lt, scratch, Operand(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
| Branch(fail, gt, scratch, Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
| } |
| |
| |
| void MacroAssembler::IsObjectJSStringType(Register object, |
| Register scratch, |
| Label* fail) { |
| DCHECK(kNotStringTag != 0); |
| |
| ld(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| lbu(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| And(scratch, scratch, Operand(kIsNotStringMask)); |
| Branch(fail, ne, scratch, Operand(zero_reg)); |
| } |
| |
| |
| void MacroAssembler::IsObjectNameType(Register object, |
| Register scratch, |
| Label* fail) { |
| ld(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| lbu(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| Branch(fail, hi, scratch, Operand(LAST_NAME_TYPE)); |
| } |
| |
| |
| // --------------------------------------------------------------------------- |
| // Support functions. |
| |
| |
| 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. |
| GetObjectType(function, result, scratch); |
| Branch(miss, ne, scratch, Operand(JS_FUNCTION_TYPE)); |
| |
| ld(scratch, |
| FieldMemOperand(function, JSFunction::kSharedFunctionInfoOffset)); |
| lwu(scratch, |
| FieldMemOperand(scratch, SharedFunctionInfo::kCompilerHintsOffset)); |
| And(scratch, scratch, |
| Operand(1 << SharedFunctionInfo::kBoundFunction)); |
| Branch(miss, ne, scratch, Operand(zero_reg)); |
| |
| // Make sure that the function has an instance prototype. |
| lbu(scratch, FieldMemOperand(result, Map::kBitFieldOffset)); |
| And(scratch, scratch, Operand(1 << Map::kHasNonInstancePrototype)); |
| Branch(&non_instance, ne, scratch, Operand(zero_reg)); |
| } |
| |
| // Get the prototype or initial map from the function. |
| ld(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(t8, Heap::kTheHoleValueRootIndex); |
| Branch(miss, eq, result, Operand(t8)); |
| |
| // If the function does not have an initial map, we're done. |
| Label done; |
| GetObjectType(result, scratch, scratch); |
| Branch(&done, ne, scratch, Operand(MAP_TYPE)); |
| |
| // Get the prototype from the initial map. |
| ld(result, FieldMemOperand(result, Map::kPrototypeOffset)); |
| |
| if (miss_on_bound_function) { |
| jmp(&done); |
| |
| // Non-instance prototype: Fetch prototype from constructor field |
| // in initial map. |
| bind(&non_instance); |
| ld(result, FieldMemOperand(result, Map::kConstructorOffset)); |
| } |
| |
| // All done. |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::GetObjectType(Register object, |
| Register map, |
| Register type_reg) { |
| ld(map, FieldMemOperand(object, HeapObject::kMapOffset)); |
| lbu(type_reg, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| } |
| |
| |
| // ----------------------------------------------------------------------------- |
| // Runtime calls. |
| |
| void MacroAssembler::CallStub(CodeStub* stub, |
| TypeFeedbackId ast_id, |
| Condition cond, |
| Register r1, |
| const Operand& r2, |
| BranchDelaySlot bd) { |
| DCHECK(AllowThisStubCall(stub)); // Stub calls are not allowed in some stubs. |
| Call(stub->GetCode(), RelocInfo::CODE_TARGET, ast_id, |
| cond, r1, r2, bd); |
| } |
| |
| |
| void MacroAssembler::TailCallStub(CodeStub* stub, |
| Condition cond, |
| Register r1, |
| const Operand& r2, |
| BranchDelaySlot bd) { |
| Jump(stub->GetCode(), RelocInfo::CODE_TARGET, cond, r1, r2, bd); |
| } |
| |
| |
| static int AddressOffset(ExternalReference ref0, ExternalReference ref1) { |
| int64_t offset = (ref0.address() - ref1.address()); |
| DCHECK(static_cast<int>(offset) == offset); |
| return static_cast<int>(offset); |
| } |
| |
| |
| 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(a1) || function_address.is(a2)); |
| |
| Label profiler_disabled; |
| Label end_profiler_check; |
| li(t9, Operand(ExternalReference::is_profiling_address(isolate()))); |
| lb(t9, MemOperand(t9, 0)); |
| Branch(&profiler_disabled, eq, t9, Operand(zero_reg)); |
| |
| // Additional parameter is the address of the actual callback. |
| li(t9, Operand(thunk_ref)); |
| jmp(&end_profiler_check); |
| |
| bind(&profiler_disabled); |
| mov(t9, function_address); |
| bind(&end_profiler_check); |
| |
| // Allocate HandleScope in callee-save registers. |
| li(s3, Operand(next_address)); |
| ld(s0, MemOperand(s3, kNextOffset)); |
| ld(s1, MemOperand(s3, kLimitOffset)); |
| ld(s2, MemOperand(s3, kLevelOffset)); |
| Daddu(s2, s2, Operand(1)); |
| sd(s2, MemOperand(s3, kLevelOffset)); |
| |
| if (FLAG_log_timer_events) { |
| FrameScope frame(this, StackFrame::MANUAL); |
| PushSafepointRegisters(); |
| PrepareCallCFunction(1, a0); |
| li(a0, 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, t9); |
| |
| if (FLAG_log_timer_events) { |
| FrameScope frame(this, StackFrame::MANUAL); |
| PushSafepointRegisters(); |
| PrepareCallCFunction(1, a0); |
| li(a0, 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. |
| ld(v0, return_value_operand); |
| bind(&return_value_loaded); |
| |
| // No more valid handles (the result handle was the last one). Restore |
| // previous handle scope. |
| sd(s0, MemOperand(s3, kNextOffset)); |
| if (emit_debug_code()) { |
| ld(a1, MemOperand(s3, kLevelOffset)); |
| Check(eq, kUnexpectedLevelAfterReturnFromApiCall, a1, Operand(s2)); |
| } |
| Dsubu(s2, s2, Operand(1)); |
| sd(s2, MemOperand(s3, kLevelOffset)); |
| ld(at, MemOperand(s3, kLimitOffset)); |
| Branch(&delete_allocated_handles, ne, s1, Operand(at)); |
| |
| // Check if the function scheduled an exception. |
| bind(&leave_exit_frame); |
| LoadRoot(a4, Heap::kTheHoleValueRootIndex); |
| li(at, Operand(ExternalReference::scheduled_exception_address(isolate()))); |
| ld(a5, MemOperand(at)); |
| Branch(&promote_scheduled_exception, ne, a4, Operand(a5)); |
| bind(&exception_handled); |
| |
| bool restore_context = context_restore_operand != NULL; |
| if (restore_context) { |
| ld(cp, *context_restore_operand); |
| } |
| li(s0, Operand(stack_space)); |
| LeaveExitFrame(false, s0, !restore_context, EMIT_RETURN); |
| |
| 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); |
| sd(s1, MemOperand(s3, kLimitOffset)); |
| mov(s0, v0); |
| mov(a0, v0); |
| PrepareCallCFunction(1, s1); |
| li(a0, Operand(ExternalReference::isolate_address(isolate()))); |
| CallCFunction(ExternalReference::delete_handle_scope_extensions(isolate()), |
| 1); |
| mov(v0, s0); |
| jmp(&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::ObjectToDoubleFPURegister(Register object, |
| FPURegister result, |
| Register scratch1, |
| Register scratch2, |
| Register heap_number_map, |
| Label* not_number, |
| ObjectToDoubleFlags flags) { |
| Label done; |
| if ((flags & OBJECT_NOT_SMI) == 0) { |
| Label not_smi; |
| JumpIfNotSmi(object, ¬_smi); |
| // Remove smi tag and convert to double. |
| // dsra(scratch1, object, kSmiTagSize); |
| dsra32(scratch1, object, 0); |
| mtc1(scratch1, result); |
| cvt_d_w(result, result); |
| Branch(&done); |
| bind(¬_smi); |
| } |
| // Check for heap number and load double value from it. |
| ld(scratch1, FieldMemOperand(object, HeapObject::kMapOffset)); |
| Branch(not_number, ne, scratch1, Operand(heap_number_map)); |
| |
| if ((flags & AVOID_NANS_AND_INFINITIES) != 0) { |
| // If exponent is all ones the number is either a NaN or +/-Infinity. |
| Register exponent = scratch1; |
| Register mask_reg = scratch2; |
| lwu(exponent, FieldMemOperand(object, HeapNumber::kExponentOffset)); |
| li(mask_reg, HeapNumber::kExponentMask); |
| |
| And(exponent, exponent, mask_reg); |
| Branch(not_number, eq, exponent, Operand(mask_reg)); |
| } |
| ldc1(result, FieldMemOperand(object, HeapNumber::kValueOffset)); |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::SmiToDoubleFPURegister(Register smi, |
| FPURegister value, |
| Register scratch1) { |
| // dsra(scratch1, smi, kSmiTagSize); |
| dsra32(scratch1, smi, 0); |
| mtc1(scratch1, value); |
| cvt_d_w(value, value); |
| } |
| |
| |
| void MacroAssembler::AdduAndCheckForOverflow(Register dst, Register left, |
| const Operand& right, |
| Register overflow_dst, |
| Register scratch) { |
| if (right.is_reg()) { |
| AdduAndCheckForOverflow(dst, left, right.rm(), overflow_dst, scratch); |
| } else { |
| if (dst.is(left)) { |
| mov(scratch, left); // Preserve left. |
| daddiu(dst, left, right.immediate()); // Left is overwritten. |
| xor_(scratch, dst, scratch); // Original left. |
| // Load right since xori takes uint16 as immediate. |
| daddiu(t9, zero_reg, right.immediate()); |
| xor_(overflow_dst, dst, t9); |
| and_(overflow_dst, overflow_dst, scratch); |
| } else { |
| daddiu(dst, left, right.immediate()); |
| xor_(overflow_dst, dst, left); |
| // Load right since xori takes uint16 as immediate. |
| daddiu(t9, zero_reg, right.immediate()); |
| xor_(scratch, dst, t9); |
| and_(overflow_dst, scratch, overflow_dst); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::AdduAndCheckForOverflow(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)); |
| |
| if (left.is(right) && dst.is(left)) { |
| DCHECK(!dst.is(t9)); |
| DCHECK(!scratch.is(t9)); |
| DCHECK(!left.is(t9)); |
| DCHECK(!right.is(t9)); |
| DCHECK(!overflow_dst.is(t9)); |
| mov(t9, right); |
| right = t9; |
| } |
| |
| if (dst.is(left)) { |
| mov(scratch, left); // Preserve left. |
| daddu(dst, left, right); // Left is overwritten. |
| xor_(scratch, dst, scratch); // Original left. |
| xor_(overflow_dst, dst, right); |
| and_(overflow_dst, overflow_dst, scratch); |
| } else if (dst.is(right)) { |
| mov(scratch, right); // Preserve right. |
| daddu(dst, left, right); // Right is overwritten. |
| xor_(scratch, dst, scratch); // Original right. |
| xor_(overflow_dst, dst, left); |
| and_(overflow_dst, overflow_dst, scratch); |
| } else { |
| daddu(dst, left, right); |
| xor_(overflow_dst, dst, left); |
| xor_(scratch, dst, right); |
| and_(overflow_dst, scratch, overflow_dst); |
| } |
| } |
| |
| |
| void MacroAssembler::SubuAndCheckForOverflow(Register dst, Register left, |
| const Operand& right, |
| Register overflow_dst, |
| Register scratch) { |
| if (right.is_reg()) { |
| SubuAndCheckForOverflow(dst, left, right.rm(), overflow_dst, scratch); |
| } else { |
| if (dst.is(left)) { |
| mov(scratch, left); // Preserve left. |
| daddiu(dst, left, -(right.immediate())); // Left is overwritten. |
| xor_(overflow_dst, dst, scratch); // scratch is original left. |
| // Load right since xori takes uint16 as immediate. |
| daddiu(t9, zero_reg, right.immediate()); |
| xor_(scratch, scratch, t9); // scratch is original left. |
| and_(overflow_dst, scratch, overflow_dst); |
| } else { |
| daddiu(dst, left, -(right.immediate())); |
| xor_(overflow_dst, dst, left); |
| // Load right since xori takes uint16 as immediate. |
| daddiu(t9, zero_reg, right.immediate()); |
| xor_(scratch, left, t9); |
| and_(overflow_dst, scratch, overflow_dst); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::SubuAndCheckForOverflow(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)); |
| DCHECK(!scratch.is(left)); |
| DCHECK(!scratch.is(right)); |
| |
| // This happens with some crankshaft code. Since Subu works fine if |
| // left == right, let's not make that restriction here. |
| if (left.is(right)) { |
| mov(dst, zero_reg); |
| mov(overflow_dst, zero_reg); |
| return; |
| } |
| |
| if (dst.is(left)) { |
| mov(scratch, left); // Preserve left. |
| dsubu(dst, left, right); // Left is overwritten. |
| xor_(overflow_dst, dst, scratch); // scratch is original left. |
| xor_(scratch, scratch, right); // scratch is original left. |
| and_(overflow_dst, scratch, overflow_dst); |
| } else if (dst.is(right)) { |
| mov(scratch, right); // Preserve right. |
| dsubu(dst, left, right); // Right is overwritten. |
| xor_(overflow_dst, dst, left); |
| xor_(scratch, left, scratch); // Original right. |
| and_(overflow_dst, scratch, overflow_dst); |
| } else { |
| dsubu(dst, left, right); |
| xor_(overflow_dst, dst, left); |
| xor_(scratch, left, right); |
| and_(overflow_dst, scratch, overflow_dst); |
| } |
| } |
| |
| |
| void MacroAssembler::CallRuntime(const Runtime::Function* f, |
| int num_arguments, |
| SaveFPRegsMode save_doubles) { |
| // All parameters are on the stack. v0 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. |
| PrepareCEntryArgs(num_arguments); |
| PrepareCEntryFunction(ExternalReference(f, isolate())); |
| CEntryStub stub(isolate(), 1, save_doubles); |
| CallStub(&stub); |
| } |
| |
| |
| void MacroAssembler::CallExternalReference(const ExternalReference& ext, |
| int num_arguments, |
| BranchDelaySlot bd) { |
| PrepareCEntryArgs(num_arguments); |
| PrepareCEntryFunction(ext); |
| |
| CEntryStub stub(isolate(), 1); |
| CallStub(&stub, TypeFeedbackId::None(), al, zero_reg, Operand(zero_reg), bd); |
| } |
| |
| |
| 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. |
| PrepareCEntryArgs(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, |
| BranchDelaySlot bd) { |
| PrepareCEntryFunction(builtin); |
| CEntryStub stub(isolate(), 1); |
| Jump(stub.GetCode(), |
| RelocInfo::CODE_TARGET, |
| al, |
| zero_reg, |
| Operand(zero_reg), |
| bd); |
| } |
| |
| |
| 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(t9, id); |
| if (flag == CALL_FUNCTION) { |
| call_wrapper.BeforeCall(CallSize(t9)); |
| Call(t9); |
| call_wrapper.AfterCall(); |
| } else { |
| DCHECK(flag == JUMP_FUNCTION); |
| Jump(t9); |
| } |
| } |
| |
| |
| void MacroAssembler::GetBuiltinFunction(Register target, |
| Builtins::JavaScript id) { |
| // Load the builtins object into target register. |
| ld(target, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
| ld(target, FieldMemOperand(target, GlobalObject::kBuiltinsOffset)); |
| // Load the JavaScript builtin function from the builtins object. |
| ld(target, FieldMemOperand(target, |
| JSBuiltinsObject::OffsetOfFunctionWithId(id))); |
| } |
| |
| |
| void MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) { |
| DCHECK(!target.is(a1)); |
| GetBuiltinFunction(a1, id); |
| // Load the code entry point from the builtins object. |
| ld(target, FieldMemOperand(a1, JSFunction::kCodeEntryOffset)); |
| } |
| |
| |
| void MacroAssembler::SetCounter(StatsCounter* counter, int value, |
| Register scratch1, Register scratch2) { |
| if (FLAG_native_code_counters && counter->Enabled()) { |
| li(scratch1, Operand(value)); |
| li(scratch2, Operand(ExternalReference(counter))); |
| sd(scratch1, MemOperand(scratch2)); |
| } |
| } |
| |
| |
| void MacroAssembler::IncrementCounter(StatsCounter* counter, int value, |
| Register scratch1, Register scratch2) { |
| DCHECK(value > 0); |
| if (FLAG_native_code_counters && counter->Enabled()) { |
| li(scratch2, Operand(ExternalReference(counter))); |
| ld(scratch1, MemOperand(scratch2)); |
| Daddu(scratch1, scratch1, Operand(value)); |
| sd(scratch1, MemOperand(scratch2)); |
| } |
| } |
| |
| |
| void MacroAssembler::DecrementCounter(StatsCounter* counter, int value, |
| Register scratch1, Register scratch2) { |
| DCHECK(value > 0); |
| if (FLAG_native_code_counters && counter->Enabled()) { |
| li(scratch2, Operand(ExternalReference(counter))); |
| ld(scratch1, MemOperand(scratch2)); |
| Dsubu(scratch1, scratch1, Operand(value)); |
| sd(scratch1, MemOperand(scratch2)); |
| } |
| } |
| |
| |
| // ----------------------------------------------------------------------------- |
| // Debugging. |
| |
| void MacroAssembler::Assert(Condition cc, BailoutReason reason, |
| Register rs, Operand rt) { |
| if (emit_debug_code()) |
| Check(cc, reason, rs, rt); |
| } |
| |
| |
| void MacroAssembler::AssertFastElements(Register elements) { |
| if (emit_debug_code()) { |
| DCHECK(!elements.is(at)); |
| Label ok; |
| push(elements); |
| ld(elements, FieldMemOperand(elements, HeapObject::kMapOffset)); |
| LoadRoot(at, Heap::kFixedArrayMapRootIndex); |
| Branch(&ok, eq, elements, Operand(at)); |
| LoadRoot(at, Heap::kFixedDoubleArrayMapRootIndex); |
| Branch(&ok, eq, elements, Operand(at)); |
| LoadRoot(at, Heap::kFixedCOWArrayMapRootIndex); |
| Branch(&ok, eq, elements, Operand(at)); |
| Abort(kJSObjectWithFastElementsMapHasSlowElements); |
| bind(&ok); |
| pop(elements); |
| } |
| } |
| |
| |
| void MacroAssembler::Check(Condition cc, BailoutReason reason, |
| Register rs, Operand rt) { |
| Label L; |
| Branch(&L, cc, rs, rt); |
| 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 |
| |
| li(a0, Operand(Smi::FromInt(reason))); |
| push(a0); |
| // 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. |
| if (is_trampoline_pool_blocked()) { |
| // If the calling code cares about the exact number of |
| // instructions generated, we insert padding here to keep the size |
| // of the Abort macro constant. |
| // Currently in debug mode with debug_code enabled the number of |
| // generated instructions is 10, so we use this as a maximum value. |
| static const int kExpectedAbortInstructions = 10; |
| int abort_instructions = InstructionsGeneratedSince(&abort_start); |
| DCHECK(abort_instructions <= kExpectedAbortInstructions); |
| while (abort_instructions++ < kExpectedAbortInstructions) { |
| nop(); |
| } |
| } |
| } |
| |
| |
| 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. |
| ld(dst, MemOperand(cp, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
| for (int i = 1; i < context_chain_length; i++) { |
| ld(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). |
| Move(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. |
| ld(scratch, |
| MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
| ld(scratch, FieldMemOperand(scratch, GlobalObject::kNativeContextOffset)); |
| |
| // Check that the function's map is the same as the expected cached map. |
| ld(scratch, |
| MemOperand(scratch, |
| Context::SlotOffset(Context::JS_ARRAY_MAPS_INDEX))); |
| size_t offset = expected_kind * kPointerSize + |
| FixedArrayBase::kHeaderSize; |
| ld(at, FieldMemOperand(scratch, offset)); |
| Branch(no_map_match, ne, map_in_out, Operand(at)); |
| |
| // Use the transitioned cached map. |
| offset = transitioned_kind * kPointerSize + |
| FixedArrayBase::kHeaderSize; |
| ld(map_in_out, FieldMemOperand(scratch, offset)); |
| } |
| |
| |
| void MacroAssembler::LoadGlobalFunction(int index, Register function) { |
| // Load the global or builtins object from the current context. |
| ld(function, |
| MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
| // Load the native context from the global or builtins object. |
| ld(function, FieldMemOperand(function, |
| GlobalObject::kNativeContextOffset)); |
| // Load the function from the native context. |
| ld(function, MemOperand(function, Context::SlotOffset(index))); |
| } |
| |
| |
| void MacroAssembler::LoadGlobalFunctionInitialMap(Register function, |
| Register map, |
| Register scratch) { |
| // Load the initial map. The global functions all have initial maps. |
| ld(map, FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| if (emit_debug_code()) { |
| Label ok, fail; |
| CheckMap(map, scratch, Heap::kMetaMapRootIndex, &fail, DO_SMI_CHECK); |
| Branch(&ok); |
| bind(&fail); |
| Abort(kGlobalFunctionsMustHaveInitialMap); |
| bind(&ok); |
| } |
| } |
| |
| |
| void MacroAssembler::StubPrologue() { |
| Push(ra, fp, cp); |
| Push(Smi::FromInt(StackFrame::STUB)); |
| // Adjust FP to point to saved FP. |
| Daddu(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp)); |
| } |
| |
| |
| void MacroAssembler::Prologue(bool code_pre_aging) { |
| PredictableCodeSizeScope predictible_code_size_scope( |
| this, kNoCodeAgeSequenceLength); |
| // The following three instructions must remain together and unmodified |
| // for code aging to work properly. |
| if (code_pre_aging) { |
| // Pre-age the code. |
| Code* stub = Code::GetPreAgedCodeAgeStub(isolate()); |
| nop(Assembler::CODE_AGE_MARKER_NOP); |
| // Load the stub address to t9 and call it, |
| // GetCodeAgeAndParity() extracts the stub address from this instruction. |
| li(t9, |
| Operand(reinterpret_cast<uint64_t>(stub->instruction_start())), |
| ADDRESS_LOAD); |
| nop(); // Prevent jalr to jal optimization. |
| jalr(t9, a0); |
| nop(); // Branch delay slot nop. |
| nop(); // Pad the empty space. |
| } else { |
| Push(ra, fp, cp, a1); |
| nop(Assembler::CODE_AGE_SEQUENCE_NOP); |
| nop(Assembler::CODE_AGE_SEQUENCE_NOP); |
| nop(Assembler::CODE_AGE_SEQUENCE_NOP); |
| // Adjust fp to point to caller's fp. |
| Daddu(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp)); |
| } |
| } |
| |
| |
| void MacroAssembler::EnterFrame(StackFrame::Type type, |
| bool load_constant_pool_pointer_reg) { |
| // Out-of-line constant pool not implemented on mips64. |
| UNREACHABLE(); |
| } |
| |
| |
| void MacroAssembler::EnterFrame(StackFrame::Type type) { |
| daddiu(sp, sp, -5 * kPointerSize); |
| li(t8, Operand(Smi::FromInt(type))); |
| li(t9, Operand(CodeObject()), CONSTANT_SIZE); |
| sd(ra, MemOperand(sp, 4 * kPointerSize)); |
| sd(fp, MemOperand(sp, 3 * kPointerSize)); |
| sd(cp, MemOperand(sp, 2 * kPointerSize)); |
| sd(t8, MemOperand(sp, 1 * kPointerSize)); |
| sd(t9, MemOperand(sp, 0 * kPointerSize)); |
| // Adjust FP to point to saved FP. |
| Daddu(fp, sp, |
| Operand(StandardFrameConstants::kFixedFrameSizeFromFp + kPointerSize)); |
| } |
| |
| |
| void MacroAssembler::LeaveFrame(StackFrame::Type type) { |
| mov(sp, fp); |
| ld(fp, MemOperand(sp, 0 * kPointerSize)); |
| ld(ra, MemOperand(sp, 1 * kPointerSize)); |
| daddiu(sp, sp, 2 * kPointerSize); |
| } |
| |
| |
| void MacroAssembler::EnterExitFrame(bool save_doubles, |
| int stack_space) { |
| // Set up the frame structure on the stack. |
| STATIC_ASSERT(2 * kPointerSize == ExitFrameConstants::kCallerSPDisplacement); |
| STATIC_ASSERT(1 * kPointerSize == ExitFrameConstants::kCallerPCOffset); |
| STATIC_ASSERT(0 * kPointerSize == ExitFrameConstants::kCallerFPOffset); |
| |
| // This is how the stack will look: |
| // fp + 2 (==kCallerSPDisplacement) - old stack's end |
| // [fp + 1 (==kCallerPCOffset)] - saved old ra |
| // [fp + 0 (==kCallerFPOffset)] - saved old fp |
| // [fp - 1 (==kSPOffset)] - sp of the called function |
| // [fp - 2 (==kCodeOffset)] - CodeObject |
| // fp - (2 + stack_space + alignment) == sp == [fp - kSPOffset] - top of the |
| // new stack (will contain saved ra) |
| |
| // Save registers. |
| daddiu(sp, sp, -4 * kPointerSize); |
| sd(ra, MemOperand(sp, 3 * kPointerSize)); |
| sd(fp, MemOperand(sp, 2 * kPointerSize)); |
| daddiu(fp, sp, 2 * kPointerSize); // Set up new frame pointer. |
| |
| if (emit_debug_code()) { |
| sd(zero_reg, MemOperand(fp, ExitFrameConstants::kSPOffset)); |
| } |
| |
| // Accessed from ExitFrame::code_slot. |
| li(t8, Operand(CodeObject()), CONSTANT_SIZE); |
| sd(t8, MemOperand(fp, ExitFrameConstants::kCodeOffset)); |
| |
| // Save the frame pointer and the context in top. |
| li(t8, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
| sd(fp, MemOperand(t8)); |
| li(t8, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
| sd(cp, MemOperand(t8)); |
| |
| const int frame_alignment = MacroAssembler::ActivationFrameAlignment(); |
| if (save_doubles) { |
| // The stack is already aligned to 0 modulo 8 for stores with sdc1. |
| int kNumOfSavedRegisters = FPURegister::kMaxNumRegisters / 2; |
| int space = kNumOfSavedRegisters * kDoubleSize ; |
| Dsubu(sp, sp, Operand(space)); |
| // Remember: we only need to save every 2nd double FPU value. |
| for (int i = 0; i < kNumOfSavedRegisters; i++) { |
| FPURegister reg = FPURegister::from_code(2 * i); |
| sdc1(reg, MemOperand(sp, i * kDoubleSize)); |
| } |
| } |
| |
| // Reserve place for the return address, stack space and an optional slot |
| // (used by the DirectCEntryStub to hold the return value if a struct is |
| // returned) and align the frame preparing for calling the runtime function. |
| DCHECK(stack_space >= 0); |
| Dsubu(sp, sp, Operand((stack_space + 2) * kPointerSize)); |
| if (frame_alignment > 0) { |
| DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
| And(sp, sp, Operand(-frame_alignment)); // Align stack. |
| } |
| |
| // Set the exit frame sp value to point just before the return address |
| // location. |
| daddiu(at, sp, kPointerSize); |
| sd(at, MemOperand(fp, ExitFrameConstants::kSPOffset)); |
| } |
| |
| |
| void MacroAssembler::LeaveExitFrame(bool save_doubles, |
| Register argument_count, |
| bool restore_context, |
| bool do_return) { |
| // Optionally restore all double registers. |
| if (save_doubles) { |
| // Remember: we only need to restore every 2nd double FPU value. |
| int kNumOfSavedRegisters = FPURegister::kMaxNumRegisters / 2; |
| Dsubu(t8, fp, Operand(ExitFrameConstants::kFrameSize + |
| kNumOfSavedRegisters * kDoubleSize)); |
| for (int i = 0; i < kNumOfSavedRegisters; i++) { |
| FPURegister reg = FPURegister::from_code(2 * i); |
| ldc1(reg, MemOperand(t8, i * kDoubleSize)); |
| } |
| } |
| |
| // Clear top frame. |
| li(t8, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
| sd(zero_reg, MemOperand(t8)); |
| |
| // Restore current context from top and clear it in debug mode. |
| if (restore_context) { |
| li(t8, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
| ld(cp, MemOperand(t8)); |
| } |
| #ifdef DEBUG |
| li(t8, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
| sd(a3, MemOperand(t8)); |
| #endif |
| |
| // Pop the arguments, restore registers, and return. |
| mov(sp, fp); // Respect ABI stack constraint. |
| ld(fp, MemOperand(sp, ExitFrameConstants::kCallerFPOffset)); |
| ld(ra, MemOperand(sp, ExitFrameConstants::kCallerPCOffset)); |
| |
| if (argument_count.is_valid()) { |
| dsll(t8, argument_count, kPointerSizeLog2); |
| daddu(sp, sp, t8); |
| } |
| |
| if (do_return) { |
| Ret(USE_DELAY_SLOT); |
| // If returning, the instruction in the delay slot will be the addiu below. |
| } |
| daddiu(sp, sp, 2 * kPointerSize); |
| } |
| |
| |
| void MacroAssembler::InitializeNewString(Register string, |
| Register length, |
| Heap::RootListIndex map_index, |
| Register scratch1, |
| Register scratch2) { |
| // dsll(scratch1, length, kSmiTagSize); |
| dsll32(scratch1, length, 0); |
| LoadRoot(scratch2, map_index); |
| sd(scratch1, FieldMemOperand(string, String::kLengthOffset)); |
| li(scratch1, Operand(String::kEmptyHashField)); |
| sd(scratch2, FieldMemOperand(string, HeapObject::kMapOffset)); |
| sd(scratch1, FieldMemOperand(string, String::kHashFieldOffset)); |
| } |
| |
| |
| int MacroAssembler::ActivationFrameAlignment() { |
| #if V8_HOST_ARCH_MIPS || V8_HOST_ARCH_MIPS64 |
| // 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 Mips |
| // platform for another Mips platform with a different alignment. |
| return base::OS::ActivationFrameAlignment(); |
| #else // V8_HOST_ARCH_MIPS |
| // 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 // V8_HOST_ARCH_MIPS |
| } |
| |
| |
| void MacroAssembler::AssertStackIsAligned() { |
| if (emit_debug_code()) { |
| const int frame_alignment = ActivationFrameAlignment(); |
| const int frame_alignment_mask = frame_alignment - 1; |
| |
| if (frame_alignment > kPointerSize) { |
| Label alignment_as_expected; |
| DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
| andi(at, sp, frame_alignment_mask); |
| Branch(&alignment_as_expected, eq, at, Operand(zero_reg)); |
| // Don't use Check here, as it will call Runtime_Abort re-entering here. |
| stop("Unexpected stack alignment"); |
| bind(&alignment_as_expected); |
| } |
| } |
| } |
| |
| |
| void MacroAssembler::JumpIfNotPowerOfTwoOrZero( |
| Register reg, |
| Register scratch, |
| Label* not_power_of_two_or_zero) { |
| Dsubu(scratch, reg, Operand(1)); |
| Branch(USE_DELAY_SLOT, not_power_of_two_or_zero, lt, |
| scratch, Operand(zero_reg)); |
| and_(at, scratch, reg); // In the delay slot. |
| Branch(not_power_of_two_or_zero, ne, at, Operand(zero_reg)); |
| } |
| |
| |
| void MacroAssembler::SmiTagCheckOverflow(Register reg, Register overflow) { |
| DCHECK(!reg.is(overflow)); |
| mov(overflow, reg); // Save original value. |
| SmiTag(reg); |
| xor_(overflow, overflow, reg); // 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); // Overflow if (value ^ 2 * value) < 0. |
| } |
| } |
| |
| |
| void MacroAssembler::SmiLoadUntag(Register dst, MemOperand src) { |
| if (SmiValuesAre32Bits()) { |
| lw(dst, UntagSmiMemOperand(src.rm(), src.offset())); |
| } else { |
| lw(dst, src); |
| SmiUntag(dst); |
| } |
| } |
| |
| |
| void MacroAssembler::SmiLoadScale(Register dst, MemOperand src, int scale) { |
| if (SmiValuesAre32Bits()) { |
| // TODO(plind): not clear if lw or ld faster here, need micro-benchmark. |
| lw(dst, UntagSmiMemOperand(src.rm(), src.offset())); |
| dsll(dst, dst, scale); |
| } else { |
| lw(dst, src); |
| DCHECK(scale >= kSmiTagSize); |
| sll(dst, dst, scale - kSmiTagSize); |
| } |
| } |
| |
| |
| // Returns 2 values: the Smi and a scaled version of the int within the Smi. |
| void MacroAssembler::SmiLoadWithScale(Register d_smi, |
| Register d_scaled, |
| MemOperand src, |
| int scale) { |
| if (SmiValuesAre32Bits()) { |
| ld(d_smi, src); |
| dsra(d_scaled, d_smi, kSmiShift - scale); |
| } else { |
| lw(d_smi, src); |
| DCHECK(scale >= kSmiTagSize); |
| sll(d_scaled, d_smi, scale - kSmiTagSize); |
| } |
| } |
| |
| |
| // Returns 2 values: the untagged Smi (int32) and scaled version of that int. |
| void MacroAssembler::SmiLoadUntagWithScale(Register d_int, |
| Register d_scaled, |
| MemOperand src, |
| int scale) { |
| if (SmiValuesAre32Bits()) { |
| lw(d_int, UntagSmiMemOperand(src.rm(), src.offset())); |
| dsll(d_scaled, d_int, scale); |
| } else { |
| lw(d_int, src); |
| // Need both the int and the scaled in, so use two instructions. |
| SmiUntag(d_int); |
| sll(d_scaled, d_int, scale); |
| } |
| } |
| |
| |
| void MacroAssembler::UntagAndJumpIfSmi(Register dst, |
| Register src, |
| Label* smi_case) { |
| // DCHECK(!dst.is(src)); |
| JumpIfSmi(src, smi_case, at, USE_DELAY_SLOT); |
| SmiUntag(dst, src); |
| } |
| |
| |
| void MacroAssembler::UntagAndJumpIfNotSmi(Register dst, |
| Register src, |
| Label* non_smi_case) { |
| // DCHECK(!dst.is(src)); |
| JumpIfNotSmi(src, non_smi_case, at, USE_DELAY_SLOT); |
| SmiUntag(dst, src); |
| } |
| |
| void MacroAssembler::JumpIfSmi(Register value, |
| Label* smi_label, |
| Register scratch, |
| BranchDelaySlot bd) { |
| DCHECK_EQ(0, kSmiTag); |
| andi(scratch, value, kSmiTagMask); |
| Branch(bd, smi_label, eq, scratch, Operand(zero_reg)); |
| } |
| |
| void MacroAssembler::JumpIfNotSmi(Register value, |
| Label* not_smi_label, |
| Register scratch, |
| BranchDelaySlot bd) { |
| DCHECK_EQ(0, kSmiTag); |
| andi(scratch, value, kSmiTagMask); |
| Branch(bd, not_smi_label, ne, scratch, Operand(zero_reg)); |
| } |
| |
| |
| void MacroAssembler::JumpIfNotBothSmi(Register reg1, |
| Register reg2, |
| Label* on_not_both_smi) { |
| STATIC_ASSERT(kSmiTag == 0); |
| // TODO(plind): Find some better to fix this assert issue. |
| #if defined(__APPLE__) |
| DCHECK_EQ(1, kSmiTagMask); |
| #else |
| DCHECK_EQ((uint64_t)1, kSmiTagMask); |
| #endif |
| or_(at, reg1, reg2); |
| JumpIfNotSmi(at, on_not_both_smi); |
| } |
| |
| |
| void MacroAssembler::JumpIfEitherSmi(Register reg1, |
| Register reg2, |
| Label* on_either_smi) { |
| STATIC_ASSERT(kSmiTag == 0); |
| // TODO(plind): Find some better to fix this assert issue. |
| #if defined(__APPLE__) |
| DCHECK_EQ(1, kSmiTagMask); |
| #else |
| DCHECK_EQ((uint64_t)1, kSmiTagMask); |
| #endif |
| // Both Smi tags must be 1 (not Smi). |
| and_(at, reg1, reg2); |
| JumpIfSmi(at, on_either_smi); |
| } |
| |
| |
| void MacroAssembler::AssertNotSmi(Register object) { |
| if (emit_debug_code()) { |
| STATIC_ASSERT(kSmiTag == 0); |
| andi(at, object, kSmiTagMask); |
| Check(ne, kOperandIsASmi, at, Operand(zero_reg)); |
| } |
| } |
| |
| |
| void MacroAssembler::AssertSmi(Register object) { |
| if (emit_debug_code()) { |
| STATIC_ASSERT(kSmiTag == 0); |
| andi(at, object, kSmiTagMask); |
| Check(eq, kOperandIsASmi, at, Operand(zero_reg)); |
| } |
| } |
| |
| |
| void MacroAssembler::AssertString(Register object) { |
| if (emit_debug_code()) { |
| STATIC_ASSERT(kSmiTag == 0); |
| SmiTst(object, a4); |
| Check(ne, kOperandIsASmiAndNotAString, a4, Operand(zero_reg)); |
| push(object); |
| ld(object, FieldMemOperand(object, HeapObject::kMapOffset)); |
| lbu(object, FieldMemOperand(object, Map::kInstanceTypeOffset)); |
| Check(lo, kOperandIsNotAString, object, Operand(FIRST_NONSTRING_TYPE)); |
| pop(object); |
| } |
| } |
| |
| |
| void MacroAssembler::AssertName(Register object) { |
| if (emit_debug_code()) { |
| STATIC_ASSERT(kSmiTag == 0); |
| SmiTst(object, a4); |
| Check(ne, kOperandIsASmiAndNotAName, a4, Operand(zero_reg)); |
| push(object); |
| ld(object, FieldMemOperand(object, HeapObject::kMapOffset)); |
| lbu(object, FieldMemOperand(object, Map::kInstanceTypeOffset)); |
| Check(le, kOperandIsNotAName, object, Operand(LAST_NAME_TYPE)); |
| pop(object); |
| } |
| } |
| |
| |
| void MacroAssembler::AssertUndefinedOrAllocationSite(Register object, |
| Register scratch) { |
| if (emit_debug_code()) { |
| Label done_checking; |
| AssertNotSmi(object); |
| LoadRoot(scratch, Heap::kUndefinedValueRootIndex); |
| Branch(&done_checking, eq, object, Operand(scratch)); |
| push(object); |
| ld(object, FieldMemOperand(object, HeapObject::kMapOffset)); |
| LoadRoot(scratch, Heap::kAllocationSiteMapRootIndex); |
| Assert(eq, kExpectedUndefinedOrCell, object, Operand(scratch)); |
| pop(object); |
| bind(&done_checking); |
| } |
| } |
| |
| |
| void MacroAssembler::AssertIsRoot(Register reg, Heap::RootListIndex index) { |
| if (emit_debug_code()) { |
| DCHECK(!reg.is(at)); |
| LoadRoot(at, index); |
| Check(eq, kHeapNumberMapRegisterClobbered, reg, Operand(at)); |
| } |
| } |
| |
| |
| void MacroAssembler::JumpIfNotHeapNumber(Register object, |
| Register heap_number_map, |
| Register scratch, |
| Label* on_not_heap_number) { |
| ld(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| AssertIsRoot(heap_number_map, Heap::kHeapNumberMapRootIndex); |
| Branch(on_not_heap_number, ne, scratch, Operand(heap_number_map)); |
| } |
| |
| |
| 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. |
| ld(mask, FieldMemOperand(number_string_cache, FixedArray::kLengthOffset)); |
| // Divide length by two (length is a smi). |
| // dsra(mask, mask, kSmiTagSize + 1); |
| dsra32(mask, mask, 1); |
| Daddu(mask, mask, -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); |
| Daddu(scratch1, |
| object, |
| Operand(HeapNumber::kValueOffset - kHeapObjectTag)); |
| ld(scratch2, MemOperand(scratch1, kPointerSize)); |
| ld(scratch1, MemOperand(scratch1, 0)); |
| Xor(scratch1, scratch1, Operand(scratch2)); |
| And(scratch1, scratch1, Operand(mask)); |
| |
| // Calculate address of entry in string cache: each entry consists |
| // of two pointer sized fields. |
| dsll(scratch1, scratch1, kPointerSizeLog2 + 1); |
| Daddu(scratch1, number_string_cache, scratch1); |
| |
| Register probe = mask; |
| ld(probe, FieldMemOperand(scratch1, FixedArray::kHeaderSize)); |
| JumpIfSmi(probe, not_found); |
| ldc1(f12, FieldMemOperand(object, HeapNumber::kValueOffset)); |
| ldc1(f14, FieldMemOperand(probe, HeapNumber::kValueOffset)); |
| BranchF(&load_result_from_cache, NULL, eq, f12, f14); |
| Branch(not_found); |
| |
| bind(&is_smi); |
| Register scratch = scratch1; |
| // dsra(scratch, object, 1); // Shift away the tag. |
| dsra32(scratch, scratch, 0); |
| And(scratch, mask, Operand(scratch)); |
| |
| // Calculate address of entry in string cache: each entry consists |
| // of two pointer sized fields. |
| dsll(scratch, scratch, kPointerSizeLog2 + 1); |
| Daddu(scratch, number_string_cache, scratch); |
| |
| // Check if the entry is the smi we are looking for. |
| ld(probe, FieldMemOperand(scratch, FixedArray::kHeaderSize)); |
| Branch(not_found, ne, object, Operand(probe)); |
| |
| // Get the result from the cache. |
| bind(&load_result_from_cache); |
| ld(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. |
| ld(scratch1, FieldMemOperand(first, HeapObject::kMapOffset)); |
| ld(scratch2, FieldMemOperand(second, HeapObject::kMapOffset)); |
| lbu(scratch1, FieldMemOperand(scratch1, Map::kInstanceTypeOffset)); |
| lbu(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. |
| STATIC_ASSERT(kSmiTag == 0); |
| And(scratch1, first, Operand(second)); |
| JumpIfSmi(scratch1, failure); |
| JumpIfNonSmisNotBothSequentialOneByteStrings(first, second, scratch1, |
| scratch2, failure); |
| } |
| |
| |
| 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; |
| DCHECK(kFlatOneByteStringTag <= 0xffff); // Ensure this fits 16-bit immed. |
| andi(scratch1, first, kFlatOneByteStringMask); |
| Branch(failure, ne, scratch1, Operand(kFlatOneByteStringTag)); |
| andi(scratch2, second, kFlatOneByteStringMask); |
| Branch(failure, ne, scratch2, Operand(kFlatOneByteStringTag)); |
| } |
| |
| |
| void MacroAssembler::JumpIfInstanceTypeIsNotSequentialOneByte(Register type, |
| Register scratch, |
| Label* failure) { |
| const int kFlatOneByteStringMask = |
| kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask; |
| const int kFlatOneByteStringTag = |
| kStringTag | kOneByteStringTag | kSeqStringTag; |
| And(scratch, type, Operand(kFlatOneByteStringMask)); |
| Branch(failure, ne, scratch, Operand(kFlatOneByteStringTag)); |
| } |
| |
| |
| static const int kRegisterPassedArguments = (kMipsAbi == kN64) ? 8 : 4; |
| |
| int MacroAssembler::CalculateStackPassedWords(int num_reg_arguments, |
| int num_double_arguments) { |
| int stack_passed_words = 0; |
| num_reg_arguments += 2 * num_double_arguments; |
| |
| // O32: Up to four simple arguments are passed in registers a0..a3. |
| // N64: Up to eight simple arguments are passed in registers a0..a7. |
| if (num_reg_arguments > kRegisterPassedArguments) { |
| stack_passed_words += num_reg_arguments - kRegisterPassedArguments; |
| } |
| stack_passed_words += kCArgSlotCount; |
| return stack_passed_words; |
| } |
| |
| |
| void MacroAssembler::EmitSeqStringSetCharCheck(Register string, |
| Register index, |
| Register value, |
| Register scratch, |
| uint32_t encoding_mask) { |
| Label is_object; |
| SmiTst(string, at); |
| Check(ne, kNonObject, at, Operand(zero_reg)); |
| |
| ld(at, FieldMemOperand(string, HeapObject::kMapOffset)); |
| lbu(at, FieldMemOperand(at, Map::kInstanceTypeOffset)); |
| |
| andi(at, at, kStringRepresentationMask | kStringEncodingMask); |
| li(scratch, Operand(encoding_mask)); |
| Check(eq, kUnexpectedStringType, at, Operand(scratch)); |
| |
| // TODO(plind): requires Smi size check code for mips32. |
| |
| ld(at, FieldMemOperand(string, String::kLengthOffset)); |
| Check(lt, kIndexIsTooLarge, index, Operand(at)); |
| |
| DCHECK(Smi::FromInt(0) == 0); |
| Check(ge, kIndexIsNegative, index, Operand(zero_reg)); |
| } |
| |
| |
| void MacroAssembler::PrepareCallCFunction(int num_reg_arguments, |
| int num_double_arguments, |
| Register scratch) { |
| int frame_alignment = ActivationFrameAlignment(); |
| |
| // n64: Up to eight simple arguments in a0..a3, a4..a7, No argument slots. |
| // O32: Up to four simple arguments are passed in registers a0..a3. |
| // Those four arguments must have reserved argument slots on the stack for |
| // mips, even though those argument slots are not normally used. |
| // Both ABIs: Remaining arguments are pushed on the stack, above (higher |
| // address than) the (O32) argument slots. (arg slot calculation handled by |
| // CalculateStackPassedWords()). |
| int stack_passed_arguments = CalculateStackPassedWords( |
| num_reg_arguments, num_double_arguments); |
| if (frame_alignment > kPointerSize) { |
| // Make stack end at alignment and make room for num_arguments - 4 words |
| // and the original value of sp. |
| mov(scratch, sp); |
| Dsubu(sp, sp, Operand((stack_passed_arguments + 1) * kPointerSize)); |
| DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
| And(sp, sp, Operand(-frame_alignment)); |
| sd(scratch, MemOperand(sp, stack_passed_arguments * kPointerSize)); |
| } else { |
| Dsubu(sp, sp, Operand(stack_passed_arguments * kPointerSize)); |
| } |
| } |
| |
| |
| void MacroAssembler::PrepareCallCFunction(int num_reg_arguments, |
| Register scratch) { |
| PrepareCallCFunction(num_reg_arguments, 0, scratch); |
| } |
| |
| |
| void MacroAssembler::CallCFunction(ExternalReference function, |
| int num_reg_arguments, |
| int num_double_arguments) { |
| li(t8, Operand(function)); |
| CallCFunctionHelper(t8, 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()); |
| // Make sure that the stack is aligned before calling a C function unless |
| // running in the simulator. The simulator has its own alignment check which |
| // provides more information. |
| // The argument stots are presumed to have been set up by |
| // PrepareCallCFunction. The C function must be called via t9, for mips ABI. |
| |
| #if V8_HOST_ARCH_MIPS || V8_HOST_ARCH_MIPS64 |
| if (emit_debug_code()) { |
| int frame_alignment = base::OS::ActivationFrameAlignment(); |
| int frame_alignment_mask = frame_alignment - 1; |
| if (frame_alignment > kPointerSize) { |
| DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
| Label alignment_as_expected; |
| And(at, sp, Operand(frame_alignment_mask)); |
| Branch(&alignment_as_expected, eq, at, Operand(zero_reg)); |
| // Don't use Check here, as it will call Runtime_Abort possibly |
| // re-entering here. |
| stop("Unexpected alignment in CallCFunction"); |
| bind(&alignment_as_expected); |
| } |
| } |
| #endif // V8_HOST_ARCH_MIPS |
| |
| // Just call directly. The function called cannot cause a GC, or |
| // allow preemption, so the return address in the link register |
| // stays correct. |
| |
| if (!function.is(t9)) { |
| mov(t9, function); |
| function = t9; |
| } |
| |
| Call(function); |
| |
| int stack_passed_arguments = CalculateStackPassedWords( |
| num_reg_arguments, num_double_arguments); |
| |
| if (base::OS::ActivationFrameAlignment() > kPointerSize) { |
| ld(sp, MemOperand(sp, stack_passed_arguments * kPointerSize)); |
| } else { |
| Daddu(sp, sp, Operand(stack_passed_arguments * kPointerSize)); |
| } |
| } |
| |
| |
| #undef BRANCH_ARGS_CHECK |
| |
| |
| void MacroAssembler::PatchRelocatedValue(Register li_location, |
| Register scratch, |
| Register new_value) { |
| lwu(scratch, MemOperand(li_location)); |
| // At this point scratch is a lui(at, ...) instruction. |
| if (emit_debug_code()) { |
| And(scratch, scratch, kOpcodeMask); |
| Check(eq, kTheInstructionToPatchShouldBeALui, |
| scratch, Operand(LUI)); |
| lwu(scratch, MemOperand(li_location)); |
| } |
| dsrl32(t9, new_value, 0); |
| Ins(scratch, t9, 0, kImm16Bits); |
| sw(scratch, MemOperand(li_location)); |
| |
| lwu(scratch, MemOperand(li_location, kInstrSize)); |
| // scratch is now ori(at, ...). |
| if (emit_debug_code()) { |
| And(scratch, scratch, kOpcodeMask); |
| Check(eq, kTheInstructionToPatchShouldBeAnOri, |
| scratch, Operand(ORI)); |
| lwu(scratch, MemOperand(li_location, kInstrSize)); |
| } |
| dsrl(t9, new_value, kImm16Bits); |
| Ins(scratch, t9, 0, kImm16Bits); |
| sw(scratch, MemOperand(li_location, kInstrSize)); |
| |
| lwu(scratch, MemOperand(li_location, kInstrSize * 3)); |
| // scratch is now ori(at, ...). |
| if (emit_debug_code()) { |
| And(scratch, scratch, kOpcodeMask); |
| Check(eq, kTheInstructionToPatchShouldBeAnOri, |
| scratch, Operand(ORI)); |
| lwu(scratch, MemOperand(li_location, kInstrSize * 3)); |
| } |
| |
| Ins(scratch, new_value, 0, kImm16Bits); |
| sw(scratch, MemOperand(li_location, kInstrSize * 3)); |
| |
| // Update the I-cache so the new lui and ori can be executed. |
| FlushICache(li_location, 4); |
| } |
| |
| void MacroAssembler::GetRelocatedValue(Register li_location, |
| Register value, |
| Register scratch) { |
| lwu(value, MemOperand(li_location)); |
| if (emit_debug_code()) { |
| And(value, value, kOpcodeMask); |
| Check(eq, kTheInstructionShouldBeALui, |
| value, Operand(LUI)); |
| lwu(value, MemOperand(li_location)); |
| } |
| |
| // value now holds a lui instruction. Extract the immediate. |
| andi(value, value, kImm16Mask); |
| dsll32(value, value, kImm16Bits); |
| |
| lwu(scratch, MemOperand(li_location, kInstrSize)); |
| if (emit_debug_code()) { |
| And(scratch, scratch, kOpcodeMask); |
| Check(eq, kTheInstructionShouldBeAnOri, |
| scratch, Operand(ORI)); |
| lwu(scratch, MemOperand(li_location, kInstrSize)); |
| } |
| // "scratch" now holds an ori instruction. Extract the immediate. |
| andi(scratch, scratch, kImm16Mask); |
| dsll32(scratch, scratch, 0); |
| |
| or_(value, value, scratch); |
| |
| lwu(scratch, MemOperand(li_location, kInstrSize * 3)); |
| if (emit_debug_code()) { |
| And(scratch, scratch, kOpcodeMask); |
| Check(eq, kTheInstructionShouldBeAnOri, |
| scratch, Operand(ORI)); |
| lwu(scratch, MemOperand(li_location, kInstrSize * 3)); |
| } |
| // "scratch" now holds an ori instruction. Extract the immediate. |
| andi(scratch, scratch, kImm16Mask); |
| dsll(scratch, scratch, kImm16Bits); |
| |
| or_(value, value, scratch); |
| // Sign extend extracted address. |
| dsra(value, value, kImm16Bits); |
| } |
| |
| |
| void MacroAssembler::CheckPageFlag( |
| Register object, |
| Register scratch, |
| int mask, |
| Condition cc, |
| Label* condition_met) { |
| And(scratch, object, Operand(~Page::kPageAlignmentMask)); |
| ld(scratch, MemOperand(scratch, MemoryChunk::kFlagsOffset)); |
| And(scratch, scratch, Operand(mask)); |
| Branch(condition_met, cc, scratch, Operand(zero_reg)); |
| } |
| |
| |
| 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, t8)); |
| DCHECK(!AreAliased(object, bitmap_scratch, mask_scratch, t9)); |
| |
| GetMarkBits(object, bitmap_scratch, mask_scratch); |
| |
| Label other_color; |
| // Note that we are using a 4-byte aligned 8-byte load. |
| Uld(t9, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| And(t8, t9, Operand(mask_scratch)); |
| Branch(&other_color, first_bit == 1 ? eq : ne, t8, Operand(zero_reg)); |
| // Shift left 1 by adding. |
| Daddu(mask_scratch, mask_scratch, Operand(mask_scratch)); |
| And(t8, t9, Operand(mask_scratch)); |
| Branch(has_color, second_bit == 1 ? ne : eq, t8, Operand(zero_reg)); |
| |
| 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) { |
| DCHECK(!AreAliased(value, scratch, t8, no_reg)); |
| Label is_data_object; |
| ld(scratch, FieldMemOperand(value, HeapObject::kMapOffset)); |
| LoadRoot(t8, Heap::kHeapNumberMapRootIndex); |
| Branch(&is_data_object, eq, t8, Operand(scratch)); |
| 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. |
| lbu(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| And(t8, scratch, Operand(kIsIndirectStringMask | kIsNotStringMask)); |
| Branch(not_data_object, ne, t8, Operand(zero_reg)); |
| 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)); |
| // addr_reg is divided into fields: |
| // |63 page base 20|19 high 8|7 shift 3|2 0| |
| // 'high' gives the index of the cell holding color bits for the object. |
| // 'shift' gives the offset in the cell for this object's color. |
| And(bitmap_reg, addr_reg, Operand(~Page::kPageAlignmentMask)); |
| Ext(mask_reg, addr_reg, kPointerSizeLog2, Bitmap::kBitsPerCellLog2); |
| const int kLowBits = kPointerSizeLog2 + Bitmap::kBitsPerCellLog2; |
| Ext(t8, addr_reg, kLowBits, kPageSizeBits - kLowBits); |
| dsll(t8, t8, Bitmap::kBytesPerCellLog2); |
| Daddu(bitmap_reg, bitmap_reg, t8); |
| li(t8, Operand(1)); |
| dsllv(mask_reg, t8, 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, t8)); |
| 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. |
| // Note that we are using a 4-byte aligned 8-byte load. |
| Uld(load_scratch, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| And(t8, mask_scratch, load_scratch); |
| Branch(&done, ne, t8, Operand(zero_reg)); |
| |
| if (emit_debug_code()) { |
| // Check for impossible bit pattern. |
| Label ok; |
| // sll may overflow, making the check conservative. |
| dsll(t8, mask_scratch, 1); |
| And(t8, load_scratch, t8); |
| Branch(&ok, eq, t8, Operand(zero_reg)); |
| 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; |
| |
| // Check for heap-number |
| ld(map, FieldMemOperand(value, HeapObject::kMapOffset)); |
| LoadRoot(t8, Heap::kHeapNumberMapRootIndex); |
| { |
| Label skip; |
| Branch(&skip, ne, t8, Operand(map)); |
| li(length, HeapNumber::kSize); |
| Branch(&is_data_object); |
| bind(&skip); |
| } |
| |
| // 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; |
| lbu(instance_type, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| And(t8, instance_type, Operand(kIsIndirectStringMask | kIsNotStringMask)); |
| Branch(value_is_white_and_not_data, ne, t8, Operand(zero_reg)); |
| // 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); |
| And(t8, instance_type, Operand(kExternalStringTag)); |
| { |
| Label skip; |
| Branch(&skip, eq, t8, Operand(zero_reg)); |
| li(length, ExternalString::kSize); |
| Branch(&is_data_object); |
| bind(&skip); |
| } |
| |
| // Sequential string, either Latin1 or UC16. |
| // For Latin1 (char-size of 1) we shift the smi tag away to get the length. |
| // For UC16 (char-size of 2) we just leave the smi tag in place, thereby |
| // getting the length multiplied by 2. |
| DCHECK(kOneByteStringTag == 4 && kStringEncodingMask == 4); |
| DCHECK(kSmiTag == 0 && kSmiTagSize == 1); |
| lw(t9, UntagSmiFieldMemOperand(value, String::kLengthOffset)); |
| And(t8, instance_type, Operand(kStringEncodingMask)); |
| { |
| Label skip; |
| Branch(&skip, ne, t8, Operand(zero_reg)); |
| // Adjust length for UC16. |
| dsll(t9, t9, 1); |
| bind(&skip); |
| } |
| Daddu(length, t9, Operand(SeqString::kHeaderSize + kObjectAlignmentMask)); |
| DCHECK(!length.is(t8)); |
| And(length, length, Operand(~kObjectAlignmentMask)); |
| |
| 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. |
| Uld(t8, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| Or(t8, t8, Operand(mask_scratch)); |
| Usd(t8, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| |
| And(bitmap_scratch, bitmap_scratch, Operand(~Page::kPageAlignmentMask)); |
| Uld(t8, MemOperand(bitmap_scratch, MemoryChunk::kLiveBytesOffset)); |
| Daddu(t8, t8, Operand(length)); |
| Usd(t8, MemOperand(bitmap_scratch, MemoryChunk::kLiveBytesOffset)); |
| |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::LoadInstanceDescriptors(Register map, |
| Register descriptors) { |
| ld(descriptors, FieldMemOperand(map, Map::kDescriptorsOffset)); |
| } |
| |
| |
| void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) { |
| ld(dst, FieldMemOperand(map, Map::kBitField3Offset)); |
| DecodeField<Map::NumberOfOwnDescriptorsBits>(dst); |
| } |
| |
| |
| void MacroAssembler::EnumLength(Register dst, Register map) { |
| STATIC_ASSERT(Map::EnumLengthBits::kShift == 0); |
| ld(dst, FieldMemOperand(map, Map::kBitField3Offset)); |
| And(dst, dst, Operand(Map::EnumLengthBits::kMask)); |
| SmiTag(dst); |
| } |
| |
| |
| void MacroAssembler::CheckEnumCache(Register null_value, Label* call_runtime) { |
| Register empty_fixed_array_value = a6; |
| LoadRoot(empty_fixed_array_value, Heap::kEmptyFixedArrayRootIndex); |
| Label next, start; |
| mov(a2, a0); |
| |
| // Check if the enum length field is properly initialized, indicating that |
| // there is an enum cache. |
| ld(a1, FieldMemOperand(a2, HeapObject::kMapOffset)); |
| |
| EnumLength(a3, a1); |
| Branch( |
| call_runtime, eq, a3, Operand(Smi::FromInt(kInvalidEnumCacheSentinel))); |
| |
| jmp(&start); |
| |
| bind(&next); |
| ld(a1, FieldMemOperand(a2, HeapObject::kMapOffset)); |
| |
| // For all objects but the receiver, check that the cache is empty. |
| EnumLength(a3, a1); |
| Branch(call_runtime, ne, a3, Operand(Smi::FromInt(0))); |
| |
| bind(&start); |
| |
| // Check that there are no elements. Register a2 contains the current JS |
| // object we've reached through the prototype chain. |
| Label no_elements; |
| ld(a2, FieldMemOperand(a2, JSObject::kElementsOffset)); |
| Branch(&no_elements, eq, a2, Operand(empty_fixed_array_value)); |
| |
| // Second chance, the object may be using the empty slow element dictionary. |
| LoadRoot(at, Heap::kEmptySlowElementDictionaryRootIndex); |
| Branch(call_runtime, ne, a2, Operand(at)); |
| |
| bind(&no_elements); |
| ld(a2, FieldMemOperand(a1, Map::kPrototypeOffset)); |
| Branch(&next, ne, a2, Operand(null_value)); |
| } |
| |
| |
| void MacroAssembler::ClampUint8(Register output_reg, Register input_reg) { |
| DCHECK(!output_reg.is(input_reg)); |
| Label done; |
| li(output_reg, Operand(255)); |
| // Normal branch: nop in delay slot. |
| Branch(&done, gt, input_reg, Operand(output_reg)); |
| // Use delay slot in this branch. |
| Branch(USE_DELAY_SLOT, &done, lt, input_reg, Operand(zero_reg)); |
| mov(output_reg, zero_reg); // In delay slot. |
| mov(output_reg, input_reg); // Value is in range 0..255. |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::ClampDoubleToUint8(Register result_reg, |
| DoubleRegister input_reg, |
| DoubleRegister temp_double_reg) { |
| Label above_zero; |
| Label done; |
| Label in_bounds; |
| |
| Move(temp_double_reg, 0.0); |
| BranchF(&above_zero, NULL, gt, input_reg, temp_double_reg); |
| |
| // Double value is less than zero, NaN or Inf, return 0. |
| mov(result_reg, zero_reg); |
| Branch(&done); |
| |
| // Double value is >= 255, return 255. |
| bind(&above_zero); |
| Move(temp_double_reg, 255.0); |
| BranchF(&in_bounds, NULL, le, input_reg, temp_double_reg); |
| li(result_reg, Operand(255)); |
| Branch(&done); |
| |
| // In 0-255 range, round and truncate. |
| bind(&in_bounds); |
| cvt_w_d(temp_double_reg, input_reg); |
| mfc1(result_reg, temp_double_reg); |
| bind(&done); |
| } |
| |
| |
| void MacroAssembler::TestJSArrayForAllocationMemento( |
| Register receiver_reg, |
| Register scratch_reg, |
| Label* no_memento_found, |
| Condition cond, |
| Label* allocation_memento_present) { |
| ExternalReference new_space_start = |
| ExternalReference::new_space_start(isolate()); |
| ExternalReference new_space_allocation_top = |
| ExternalReference::new_space_allocation_top_address(isolate()); |
| Daddu(scratch_reg, receiver_reg, |
| Operand(JSArray::kSize + AllocationMemento::kSize - kHeapObjectTag)); |
| Branch(no_memento_found, lt, scratch_reg, Operand(new_space_start)); |
| li(at, Operand(new_space_allocation_top)); |
| ld(at, MemOperand(at)); |
| Branch(no_memento_found, gt, scratch_reg, Operand(at)); |
| ld(scratch_reg, MemOperand(scratch_reg, -AllocationMemento::kSize)); |
| if (allocation_memento_present) { |
| Branch(allocation_memento_present, cond, scratch_reg, |
| Operand(isolate()->factory()->allocation_memento_map())); |
| } |
| } |
| |
| |
| 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. |
| Move(current, object); |
| |
| // Loop based on the map going up the prototype chain. |
| bind(&loop_again); |
| ld(current, FieldMemOperand(current, HeapObject::kMapOffset)); |
| lb(scratch1, FieldMemOperand(current, Map::kBitField2Offset)); |
| DecodeField<Map::ElementsKindBits>(scratch1); |
| Branch(found, eq, scratch1, Operand(DICTIONARY_ELEMENTS)); |
| ld(current, FieldMemOperand(current, Map::kPrototypeOffset)); |
| Branch(&loop_again, ne, current, Operand(factory->null_value())); |
| } |
| |
| |
| 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; |
| } |
| |
| |
| 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::Emit(Address addr) { |
| // masm()->emit(reinterpret_cast<Instr>(addr)); |
| } |
| |
| |
| void CodePatcher::ChangeBranchCondition(Condition cond) { |
| Instr instr = Assembler::instr_at(masm_.pc_); |
| DCHECK(Assembler::IsBranch(instr)); |
| uint32_t opcode = Assembler::GetOpcodeField(instr); |
| // Currently only the 'eq' and 'ne' cond values are supported and the simple |
| // branch instructions (with opcode being the branch type). |
| // There are some special cases (see Assembler::IsBranch()) so extending this |
| // would be tricky. |
| DCHECK(opcode == BEQ || |
| opcode == BNE || |
| opcode == BLEZ || |
| opcode == BGTZ || |
| opcode == BEQL || |
| opcode == BNEL || |
| opcode == BLEZL || |
| opcode == BGTZL); |
| opcode = (cond == eq) ? BEQ : BNE; |
| instr = (instr & ~kOpcodeMask) | opcode; |
| masm_.emit(instr); |
| } |
| |
| |
| void MacroAssembler::TruncatingDiv(Register result, |
| Register dividend, |
| int32_t divisor) { |
| DCHECK(!dividend.is(result)); |
| DCHECK(!dividend.is(at)); |
| DCHECK(!result.is(at)); |
| base::MagicNumbersForDivision<uint32_t> mag = |
| base::SignedDivisionByConstant(static_cast<uint32_t>(divisor)); |
| li(at, Operand(static_cast<int32_t>(mag.multiplier))); |
| Mulh(result, dividend, Operand(at)); |
| bool neg = (mag.multiplier & (static_cast<uint32_t>(1) << 31)) != 0; |
| if (divisor > 0 && neg) { |
| Addu(result, result, Operand(dividend)); |
| } |
| if (divisor < 0 && !neg && mag.multiplier > 0) { |
| Subu(result, result, Operand(dividend)); |
| } |
| if (mag.shift > 0) sra(result, result, mag.shift); |
| srl(at, dividend, 31); |
| Addu(result, result, Operand(at)); |
| } |
| |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_TARGET_ARCH_MIPS64 |