| // Copyright 2013 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. |
| |
| #if V8_TARGET_ARCH_ARM64 |
| |
| #include "src/bootstrapper.h" |
| #include "src/code-stubs.h" |
| #include "src/codegen.h" |
| #include "src/ic/handler-compiler.h" |
| #include "src/ic/ic.h" |
| #include "src/ic/stub-cache.h" |
| #include "src/isolate.h" |
| #include "src/regexp/jsregexp.h" |
| #include "src/regexp/regexp-macro-assembler.h" |
| #include "src/runtime/runtime.h" |
| |
| #include "src/arm64/code-stubs-arm64.h" |
| #include "src/arm64/frames-arm64.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| static void InitializeArrayConstructorDescriptor( |
| Isolate* isolate, CodeStubDescriptor* descriptor, |
| int constant_stack_parameter_count) { |
| // cp: context |
| // x1: function |
| // x2: allocation site with elements kind |
| // x0: number of arguments to the constructor function |
| Address deopt_handler = Runtime::FunctionForId( |
| Runtime::kArrayConstructor)->entry; |
| |
| if (constant_stack_parameter_count == 0) { |
| descriptor->Initialize(deopt_handler, constant_stack_parameter_count, |
| JS_FUNCTION_STUB_MODE); |
| } else { |
| descriptor->Initialize(x0, deopt_handler, constant_stack_parameter_count, |
| JS_FUNCTION_STUB_MODE); |
| } |
| } |
| |
| |
| void ArrayNoArgumentConstructorStub::InitializeDescriptor( |
| CodeStubDescriptor* descriptor) { |
| InitializeArrayConstructorDescriptor(isolate(), descriptor, 0); |
| } |
| |
| |
| void ArraySingleArgumentConstructorStub::InitializeDescriptor( |
| CodeStubDescriptor* descriptor) { |
| InitializeArrayConstructorDescriptor(isolate(), descriptor, 1); |
| } |
| |
| |
| void ArrayNArgumentsConstructorStub::InitializeDescriptor( |
| CodeStubDescriptor* descriptor) { |
| InitializeArrayConstructorDescriptor(isolate(), descriptor, -1); |
| } |
| |
| |
| static void InitializeInternalArrayConstructorDescriptor( |
| Isolate* isolate, CodeStubDescriptor* descriptor, |
| int constant_stack_parameter_count) { |
| Address deopt_handler = Runtime::FunctionForId( |
| Runtime::kInternalArrayConstructor)->entry; |
| |
| if (constant_stack_parameter_count == 0) { |
| descriptor->Initialize(deopt_handler, constant_stack_parameter_count, |
| JS_FUNCTION_STUB_MODE); |
| } else { |
| descriptor->Initialize(x0, deopt_handler, constant_stack_parameter_count, |
| JS_FUNCTION_STUB_MODE); |
| } |
| } |
| |
| |
| void InternalArrayNoArgumentConstructorStub::InitializeDescriptor( |
| CodeStubDescriptor* descriptor) { |
| InitializeInternalArrayConstructorDescriptor(isolate(), descriptor, 0); |
| } |
| |
| |
| void InternalArraySingleArgumentConstructorStub::InitializeDescriptor( |
| CodeStubDescriptor* descriptor) { |
| InitializeInternalArrayConstructorDescriptor(isolate(), descriptor, 1); |
| } |
| |
| |
| void InternalArrayNArgumentsConstructorStub::InitializeDescriptor( |
| CodeStubDescriptor* descriptor) { |
| InitializeInternalArrayConstructorDescriptor(isolate(), descriptor, -1); |
| } |
| |
| |
| #define __ ACCESS_MASM(masm) |
| |
| |
| void HydrogenCodeStub::GenerateLightweightMiss(MacroAssembler* masm, |
| ExternalReference miss) { |
| // Update the static counter each time a new code stub is generated. |
| isolate()->counters()->code_stubs()->Increment(); |
| |
| CallInterfaceDescriptor descriptor = GetCallInterfaceDescriptor(); |
| int param_count = descriptor.GetRegisterParameterCount(); |
| { |
| // Call the runtime system in a fresh internal frame. |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| DCHECK((param_count == 0) || |
| x0.Is(descriptor.GetRegisterParameter(param_count - 1))); |
| |
| // Push arguments |
| MacroAssembler::PushPopQueue queue(masm); |
| for (int i = 0; i < param_count; ++i) { |
| queue.Queue(descriptor.GetRegisterParameter(i)); |
| } |
| queue.PushQueued(); |
| |
| __ CallExternalReference(miss, param_count); |
| } |
| |
| __ Ret(); |
| } |
| |
| |
| void DoubleToIStub::Generate(MacroAssembler* masm) { |
| Label done; |
| Register input = source(); |
| Register result = destination(); |
| DCHECK(is_truncating()); |
| |
| DCHECK(result.Is64Bits()); |
| DCHECK(jssp.Is(masm->StackPointer())); |
| |
| int double_offset = offset(); |
| |
| DoubleRegister double_scratch = d0; // only used if !skip_fastpath() |
| Register scratch1 = GetAllocatableRegisterThatIsNotOneOf(input, result); |
| Register scratch2 = |
| GetAllocatableRegisterThatIsNotOneOf(input, result, scratch1); |
| |
| __ Push(scratch1, scratch2); |
| // Account for saved regs if input is jssp. |
| if (input.is(jssp)) double_offset += 2 * kPointerSize; |
| |
| if (!skip_fastpath()) { |
| __ Push(double_scratch); |
| if (input.is(jssp)) double_offset += 1 * kDoubleSize; |
| __ Ldr(double_scratch, MemOperand(input, double_offset)); |
| // Try to convert with a FPU convert instruction. This handles all |
| // non-saturating cases. |
| __ TryConvertDoubleToInt64(result, double_scratch, &done); |
| __ Fmov(result, double_scratch); |
| } else { |
| __ Ldr(result, MemOperand(input, double_offset)); |
| } |
| |
| // If we reach here we need to manually convert the input to an int32. |
| |
| // Extract the exponent. |
| Register exponent = scratch1; |
| __ Ubfx(exponent, result, HeapNumber::kMantissaBits, |
| HeapNumber::kExponentBits); |
| |
| // It the exponent is >= 84 (kMantissaBits + 32), the result is always 0 since |
| // the mantissa gets shifted completely out of the int32_t result. |
| __ Cmp(exponent, HeapNumber::kExponentBias + HeapNumber::kMantissaBits + 32); |
| __ CzeroX(result, ge); |
| __ B(ge, &done); |
| |
| // The Fcvtzs sequence handles all cases except where the conversion causes |
| // signed overflow in the int64_t target. Since we've already handled |
| // exponents >= 84, we can guarantee that 63 <= exponent < 84. |
| |
| if (masm->emit_debug_code()) { |
| __ Cmp(exponent, HeapNumber::kExponentBias + 63); |
| // Exponents less than this should have been handled by the Fcvt case. |
| __ Check(ge, kUnexpectedValue); |
| } |
| |
| // Isolate the mantissa bits, and set the implicit '1'. |
| Register mantissa = scratch2; |
| __ Ubfx(mantissa, result, 0, HeapNumber::kMantissaBits); |
| __ Orr(mantissa, mantissa, 1UL << HeapNumber::kMantissaBits); |
| |
| // Negate the mantissa if necessary. |
| __ Tst(result, kXSignMask); |
| __ Cneg(mantissa, mantissa, ne); |
| |
| // Shift the mantissa bits in the correct place. We know that we have to shift |
| // it left here, because exponent >= 63 >= kMantissaBits. |
| __ Sub(exponent, exponent, |
| HeapNumber::kExponentBias + HeapNumber::kMantissaBits); |
| __ Lsl(result, mantissa, exponent); |
| |
| __ Bind(&done); |
| if (!skip_fastpath()) { |
| __ Pop(double_scratch); |
| } |
| __ Pop(scratch2, scratch1); |
| __ Ret(); |
| } |
| |
| |
| // See call site for description. |
| static void EmitIdenticalObjectComparison(MacroAssembler* masm, Register left, |
| Register right, Register scratch, |
| FPRegister double_scratch, |
| Label* slow, Condition cond) { |
| DCHECK(!AreAliased(left, right, scratch)); |
| Label not_identical, return_equal, heap_number; |
| Register result = x0; |
| |
| __ Cmp(right, left); |
| __ B(ne, ¬_identical); |
| |
| // Test for NaN. Sadly, we can't just compare to factory::nan_value(), |
| // so we do the second best thing - test it ourselves. |
| // They are both equal and they are not both Smis so both of them are not |
| // Smis. If it's not a heap number, then return equal. |
| Register right_type = scratch; |
| if ((cond == lt) || (cond == gt)) { |
| // Call runtime on identical JSObjects. Otherwise return equal. |
| __ JumpIfObjectType(right, right_type, right_type, FIRST_JS_RECEIVER_TYPE, |
| slow, ge); |
| // Call runtime on identical symbols since we need to throw a TypeError. |
| __ Cmp(right_type, SYMBOL_TYPE); |
| __ B(eq, slow); |
| // Call runtime on identical SIMD values since we must throw a TypeError. |
| __ Cmp(right_type, SIMD128_VALUE_TYPE); |
| __ B(eq, slow); |
| } else if (cond == eq) { |
| __ JumpIfHeapNumber(right, &heap_number); |
| } else { |
| __ JumpIfObjectType(right, right_type, right_type, HEAP_NUMBER_TYPE, |
| &heap_number); |
| // Comparing JS objects with <=, >= is complicated. |
| __ Cmp(right_type, FIRST_JS_RECEIVER_TYPE); |
| __ B(ge, slow); |
| // Call runtime on identical symbols since we need to throw a TypeError. |
| __ Cmp(right_type, SYMBOL_TYPE); |
| __ B(eq, slow); |
| // Call runtime on identical SIMD values since we must throw a TypeError. |
| __ Cmp(right_type, SIMD128_VALUE_TYPE); |
| __ B(eq, slow); |
| // Normally here we fall through to return_equal, but undefined is |
| // special: (undefined == undefined) == true, but |
| // (undefined <= undefined) == false! See ECMAScript 11.8.5. |
| if ((cond == le) || (cond == ge)) { |
| __ Cmp(right_type, ODDBALL_TYPE); |
| __ B(ne, &return_equal); |
| __ JumpIfNotRoot(right, Heap::kUndefinedValueRootIndex, &return_equal); |
| if (cond == le) { |
| // undefined <= undefined should fail. |
| __ Mov(result, GREATER); |
| } else { |
| // undefined >= undefined should fail. |
| __ Mov(result, LESS); |
| } |
| __ Ret(); |
| } |
| } |
| |
| __ Bind(&return_equal); |
| if (cond == lt) { |
| __ Mov(result, GREATER); // Things aren't less than themselves. |
| } else if (cond == gt) { |
| __ Mov(result, LESS); // Things aren't greater than themselves. |
| } else { |
| __ Mov(result, EQUAL); // Things are <=, >=, ==, === themselves. |
| } |
| __ Ret(); |
| |
| // Cases lt and gt have been handled earlier, and case ne is never seen, as |
| // it is handled in the parser (see Parser::ParseBinaryExpression). We are |
| // only concerned with cases ge, le and eq here. |
| if ((cond != lt) && (cond != gt)) { |
| DCHECK((cond == ge) || (cond == le) || (cond == eq)); |
| __ Bind(&heap_number); |
| // Left and right are identical pointers to a heap number object. Return |
| // non-equal if the heap number is a NaN, and equal otherwise. Comparing |
| // the number to itself will set the overflow flag iff the number is NaN. |
| __ Ldr(double_scratch, FieldMemOperand(right, HeapNumber::kValueOffset)); |
| __ Fcmp(double_scratch, double_scratch); |
| __ B(vc, &return_equal); // Not NaN, so treat as normal heap number. |
| |
| if (cond == le) { |
| __ Mov(result, GREATER); |
| } else { |
| __ Mov(result, LESS); |
| } |
| __ Ret(); |
| } |
| |
| // No fall through here. |
| if (FLAG_debug_code) { |
| __ Unreachable(); |
| } |
| |
| __ Bind(¬_identical); |
| } |
| |
| |
| // See call site for description. |
| static void EmitStrictTwoHeapObjectCompare(MacroAssembler* masm, |
| Register left, |
| Register right, |
| Register left_type, |
| Register right_type, |
| Register scratch) { |
| DCHECK(!AreAliased(left, right, left_type, right_type, scratch)); |
| |
| if (masm->emit_debug_code()) { |
| // We assume that the arguments are not identical. |
| __ Cmp(left, right); |
| __ Assert(ne, kExpectedNonIdenticalObjects); |
| } |
| |
| // If either operand is a JS object or an oddball value, then they are not |
| // equal since their pointers are different. |
| // There is no test for undetectability in strict equality. |
| STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE); |
| Label right_non_object; |
| |
| __ Cmp(right_type, FIRST_JS_RECEIVER_TYPE); |
| __ B(lt, &right_non_object); |
| |
| // Return non-zero - x0 already contains a non-zero pointer. |
| DCHECK(left.is(x0) || right.is(x0)); |
| Label return_not_equal; |
| __ Bind(&return_not_equal); |
| __ Ret(); |
| |
| __ Bind(&right_non_object); |
| |
| // Check for oddballs: true, false, null, undefined. |
| __ Cmp(right_type, ODDBALL_TYPE); |
| |
| // If right is not ODDBALL, test left. Otherwise, set eq condition. |
| __ Ccmp(left_type, ODDBALL_TYPE, ZFlag, ne); |
| |
| // If right or left is not ODDBALL, test left >= FIRST_JS_RECEIVER_TYPE. |
| // Otherwise, right or left is ODDBALL, so set a ge condition. |
| __ Ccmp(left_type, FIRST_JS_RECEIVER_TYPE, NVFlag, ne); |
| |
| __ B(ge, &return_not_equal); |
| |
| // Internalized strings are unique, so they can only be equal if they are the |
| // same object. We have already tested that case, so if left and right are |
| // both internalized strings, they cannot be equal. |
| STATIC_ASSERT((kInternalizedTag == 0) && (kStringTag == 0)); |
| __ Orr(scratch, left_type, right_type); |
| __ TestAndBranchIfAllClear( |
| scratch, kIsNotStringMask | kIsNotInternalizedMask, &return_not_equal); |
| } |
| |
| |
| // See call site for description. |
| static void EmitSmiNonsmiComparison(MacroAssembler* masm, |
| Register left, |
| Register right, |
| FPRegister left_d, |
| FPRegister right_d, |
| Label* slow, |
| bool strict) { |
| DCHECK(!AreAliased(left_d, right_d)); |
| DCHECK((left.is(x0) && right.is(x1)) || |
| (right.is(x0) && left.is(x1))); |
| Register result = x0; |
| |
| Label right_is_smi, done; |
| __ JumpIfSmi(right, &right_is_smi); |
| |
| // Left is the smi. Check whether right is a heap number. |
| if (strict) { |
| // If right is not a number and left is a smi, then strict equality cannot |
| // succeed. Return non-equal. |
| Label is_heap_number; |
| __ JumpIfHeapNumber(right, &is_heap_number); |
| // Register right is a non-zero pointer, which is a valid NOT_EQUAL result. |
| if (!right.is(result)) { |
| __ Mov(result, NOT_EQUAL); |
| } |
| __ Ret(); |
| __ Bind(&is_heap_number); |
| } else { |
| // Smi compared non-strictly with a non-smi, non-heap-number. Call the |
| // runtime. |
| __ JumpIfNotHeapNumber(right, slow); |
| } |
| |
| // Left is the smi. Right is a heap number. Load right value into right_d, and |
| // convert left smi into double in left_d. |
| __ Ldr(right_d, FieldMemOperand(right, HeapNumber::kValueOffset)); |
| __ SmiUntagToDouble(left_d, left); |
| __ B(&done); |
| |
| __ Bind(&right_is_smi); |
| // Right is a smi. Check whether the non-smi left is a heap number. |
| if (strict) { |
| // If left is not a number and right is a smi then strict equality cannot |
| // succeed. Return non-equal. |
| Label is_heap_number; |
| __ JumpIfHeapNumber(left, &is_heap_number); |
| // Register left is a non-zero pointer, which is a valid NOT_EQUAL result. |
| if (!left.is(result)) { |
| __ Mov(result, NOT_EQUAL); |
| } |
| __ Ret(); |
| __ Bind(&is_heap_number); |
| } else { |
| // Smi compared non-strictly with a non-smi, non-heap-number. Call the |
| // runtime. |
| __ JumpIfNotHeapNumber(left, slow); |
| } |
| |
| // Right is the smi. Left is a heap number. Load left value into left_d, and |
| // convert right smi into double in right_d. |
| __ Ldr(left_d, FieldMemOperand(left, HeapNumber::kValueOffset)); |
| __ SmiUntagToDouble(right_d, right); |
| |
| // Fall through to both_loaded_as_doubles. |
| __ Bind(&done); |
| } |
| |
| |
| // Fast negative check for internalized-to-internalized equality. |
| // See call site for description. |
| static void EmitCheckForInternalizedStringsOrObjects( |
| MacroAssembler* masm, Register left, Register right, Register left_map, |
| Register right_map, Register left_type, Register right_type, |
| Label* possible_strings, Label* runtime_call) { |
| DCHECK(!AreAliased(left, right, left_map, right_map, left_type, right_type)); |
| Register result = x0; |
| DCHECK(left.is(x0) || right.is(x0)); |
| |
| Label object_test, return_unequal, undetectable; |
| STATIC_ASSERT((kInternalizedTag == 0) && (kStringTag == 0)); |
| // TODO(all): reexamine this branch sequence for optimisation wrt branch |
| // prediction. |
| __ Tbnz(right_type, MaskToBit(kIsNotStringMask), &object_test); |
| __ Tbnz(right_type, MaskToBit(kIsNotInternalizedMask), possible_strings); |
| __ Tbnz(left_type, MaskToBit(kIsNotStringMask), runtime_call); |
| __ Tbnz(left_type, MaskToBit(kIsNotInternalizedMask), possible_strings); |
| |
| // Both are internalized. We already checked they weren't the same pointer so |
| // they are not equal. Return non-equal by returning the non-zero object |
| // pointer in x0. |
| __ Ret(); |
| |
| __ Bind(&object_test); |
| |
| Register left_bitfield = left_type; |
| Register right_bitfield = right_type; |
| __ Ldrb(right_bitfield, FieldMemOperand(right_map, Map::kBitFieldOffset)); |
| __ Ldrb(left_bitfield, FieldMemOperand(left_map, Map::kBitFieldOffset)); |
| __ Tbnz(right_bitfield, MaskToBit(1 << Map::kIsUndetectable), &undetectable); |
| __ Tbnz(left_bitfield, MaskToBit(1 << Map::kIsUndetectable), &return_unequal); |
| |
| __ CompareInstanceType(right_map, right_type, FIRST_JS_RECEIVER_TYPE); |
| __ B(lt, runtime_call); |
| __ CompareInstanceType(left_map, left_type, FIRST_JS_RECEIVER_TYPE); |
| __ B(lt, runtime_call); |
| |
| __ bind(&return_unequal); |
| // Return non-equal by returning the non-zero object pointer in x0. |
| __ Ret(); |
| |
| __ bind(&undetectable); |
| __ Tbz(left_bitfield, MaskToBit(1 << Map::kIsUndetectable), &return_unequal); |
| __ Mov(result, EQUAL); |
| __ Ret(); |
| } |
| |
| |
| static void CompareICStub_CheckInputType(MacroAssembler* masm, Register input, |
| CompareICState::State expected, |
| Label* fail) { |
| Label ok; |
| if (expected == CompareICState::SMI) { |
| __ JumpIfNotSmi(input, fail); |
| } else if (expected == CompareICState::NUMBER) { |
| __ JumpIfSmi(input, &ok); |
| __ JumpIfNotHeapNumber(input, fail); |
| } |
| // We could be strict about internalized/non-internalized here, but as long as |
| // hydrogen doesn't care, the stub doesn't have to care either. |
| __ Bind(&ok); |
| } |
| |
| |
| void CompareICStub::GenerateGeneric(MacroAssembler* masm) { |
| Register lhs = x1; |
| Register rhs = x0; |
| Register result = x0; |
| Condition cond = GetCondition(); |
| |
| Label miss; |
| CompareICStub_CheckInputType(masm, lhs, left(), &miss); |
| CompareICStub_CheckInputType(masm, rhs, right(), &miss); |
| |
| Label slow; // Call builtin. |
| Label not_smis, both_loaded_as_doubles; |
| Label not_two_smis, smi_done; |
| __ JumpIfEitherNotSmi(lhs, rhs, ¬_two_smis); |
| __ SmiUntag(lhs); |
| __ Sub(result, lhs, Operand::UntagSmi(rhs)); |
| __ Ret(); |
| |
| __ Bind(¬_two_smis); |
| |
| // NOTICE! This code is only reached after a smi-fast-case check, so it is |
| // certain that at least one operand isn't a smi. |
| |
| // Handle the case where the objects are identical. Either returns the answer |
| // or goes to slow. Only falls through if the objects were not identical. |
| EmitIdenticalObjectComparison(masm, lhs, rhs, x10, d0, &slow, cond); |
| |
| // If either is a smi (we know that at least one is not a smi), then they can |
| // only be strictly equal if the other is a HeapNumber. |
| __ JumpIfBothNotSmi(lhs, rhs, ¬_smis); |
| |
| // Exactly one operand is a smi. EmitSmiNonsmiComparison generates code that |
| // can: |
| // 1) Return the answer. |
| // 2) Branch to the slow case. |
| // 3) Fall through to both_loaded_as_doubles. |
| // In case 3, we have found out that we were dealing with a number-number |
| // comparison. The double values of the numbers have been loaded, right into |
| // rhs_d, left into lhs_d. |
| FPRegister rhs_d = d0; |
| FPRegister lhs_d = d1; |
| EmitSmiNonsmiComparison(masm, lhs, rhs, lhs_d, rhs_d, &slow, strict()); |
| |
| __ Bind(&both_loaded_as_doubles); |
| // The arguments have been converted to doubles and stored in rhs_d and |
| // lhs_d. |
| Label nan; |
| __ Fcmp(lhs_d, rhs_d); |
| __ B(vs, &nan); // Overflow flag set if either is NaN. |
| STATIC_ASSERT((LESS == -1) && (EQUAL == 0) && (GREATER == 1)); |
| __ Cset(result, gt); // gt => 1, otherwise (lt, eq) => 0 (EQUAL). |
| __ Csinv(result, result, xzr, ge); // lt => -1, gt => 1, eq => 0. |
| __ Ret(); |
| |
| __ Bind(&nan); |
| // Left and/or right is a NaN. Load the result register with whatever makes |
| // the comparison fail, since comparisons with NaN always fail (except ne, |
| // which is filtered out at a higher level.) |
| DCHECK(cond != ne); |
| if ((cond == lt) || (cond == le)) { |
| __ Mov(result, GREATER); |
| } else { |
| __ Mov(result, LESS); |
| } |
| __ Ret(); |
| |
| __ Bind(¬_smis); |
| // At this point we know we are dealing with two different objects, and |
| // neither of them is a smi. The objects are in rhs_ and lhs_. |
| |
| // Load the maps and types of the objects. |
| Register rhs_map = x10; |
| Register rhs_type = x11; |
| Register lhs_map = x12; |
| Register lhs_type = x13; |
| __ Ldr(rhs_map, FieldMemOperand(rhs, HeapObject::kMapOffset)); |
| __ Ldr(lhs_map, FieldMemOperand(lhs, HeapObject::kMapOffset)); |
| __ Ldrb(rhs_type, FieldMemOperand(rhs_map, Map::kInstanceTypeOffset)); |
| __ Ldrb(lhs_type, FieldMemOperand(lhs_map, Map::kInstanceTypeOffset)); |
| |
| if (strict()) { |
| // This emits a non-equal return sequence for some object types, or falls |
| // through if it was not lucky. |
| EmitStrictTwoHeapObjectCompare(masm, lhs, rhs, lhs_type, rhs_type, x14); |
| } |
| |
| Label check_for_internalized_strings; |
| Label flat_string_check; |
| // Check for heap number comparison. Branch to earlier double comparison code |
| // if they are heap numbers, otherwise, branch to internalized string check. |
| __ Cmp(rhs_type, HEAP_NUMBER_TYPE); |
| __ B(ne, &check_for_internalized_strings); |
| __ Cmp(lhs_map, rhs_map); |
| |
| // If maps aren't equal, lhs_ and rhs_ are not heap numbers. Branch to flat |
| // string check. |
| __ B(ne, &flat_string_check); |
| |
| // Both lhs_ and rhs_ are heap numbers. Load them and branch to the double |
| // comparison code. |
| __ Ldr(lhs_d, FieldMemOperand(lhs, HeapNumber::kValueOffset)); |
| __ Ldr(rhs_d, FieldMemOperand(rhs, HeapNumber::kValueOffset)); |
| __ B(&both_loaded_as_doubles); |
| |
| __ Bind(&check_for_internalized_strings); |
| // In the strict case, the EmitStrictTwoHeapObjectCompare already took care |
| // of internalized strings. |
| if ((cond == eq) && !strict()) { |
| // Returns an answer for two internalized strings or two detectable objects. |
| // Otherwise branches to the string case or not both strings case. |
| EmitCheckForInternalizedStringsOrObjects(masm, lhs, rhs, lhs_map, rhs_map, |
| lhs_type, rhs_type, |
| &flat_string_check, &slow); |
| } |
| |
| // Check for both being sequential one-byte strings, |
| // and inline if that is the case. |
| __ Bind(&flat_string_check); |
| __ JumpIfBothInstanceTypesAreNotSequentialOneByte(lhs_type, rhs_type, x14, |
| x15, &slow); |
| |
| __ IncrementCounter(isolate()->counters()->string_compare_native(), 1, x10, |
| x11); |
| if (cond == eq) { |
| StringHelper::GenerateFlatOneByteStringEquals(masm, lhs, rhs, x10, x11, |
| x12); |
| } else { |
| StringHelper::GenerateCompareFlatOneByteStrings(masm, lhs, rhs, x10, x11, |
| x12, x13); |
| } |
| |
| // Never fall through to here. |
| if (FLAG_debug_code) { |
| __ Unreachable(); |
| } |
| |
| __ Bind(&slow); |
| |
| if (cond == eq) { |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ Push(lhs, rhs); |
| __ CallRuntime(strict() ? Runtime::kStrictEqual : Runtime::kEqual); |
| } |
| // Turn true into 0 and false into some non-zero value. |
| STATIC_ASSERT(EQUAL == 0); |
| __ LoadRoot(x1, Heap::kTrueValueRootIndex); |
| __ Sub(x0, x0, x1); |
| __ Ret(); |
| } else { |
| __ Push(lhs, rhs); |
| int ncr; // NaN compare result |
| if ((cond == lt) || (cond == le)) { |
| ncr = GREATER; |
| } else { |
| DCHECK((cond == gt) || (cond == ge)); // remaining cases |
| ncr = LESS; |
| } |
| __ Mov(x10, Smi::FromInt(ncr)); |
| __ Push(x10); |
| |
| // Call the native; it returns -1 (less), 0 (equal), or 1 (greater) |
| // tagged as a small integer. |
| __ TailCallRuntime(Runtime::kCompare); |
| } |
| |
| __ Bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| |
| void StoreBufferOverflowStub::Generate(MacroAssembler* masm) { |
| CPURegList saved_regs = kCallerSaved; |
| CPURegList saved_fp_regs = kCallerSavedFP; |
| |
| // We don't allow a GC during a store buffer overflow so there is no need to |
| // store the registers in any particular way, but we do have to store and |
| // restore them. |
| |
| // We don't care if MacroAssembler scratch registers are corrupted. |
| saved_regs.Remove(*(masm->TmpList())); |
| saved_fp_regs.Remove(*(masm->FPTmpList())); |
| |
| __ PushCPURegList(saved_regs); |
| if (save_doubles()) { |
| __ PushCPURegList(saved_fp_regs); |
| } |
| |
| AllowExternalCallThatCantCauseGC scope(masm); |
| __ Mov(x0, ExternalReference::isolate_address(isolate())); |
| __ CallCFunction( |
| ExternalReference::store_buffer_overflow_function(isolate()), 1, 0); |
| |
| if (save_doubles()) { |
| __ PopCPURegList(saved_fp_regs); |
| } |
| __ PopCPURegList(saved_regs); |
| __ Ret(); |
| } |
| |
| |
| void StoreBufferOverflowStub::GenerateFixedRegStubsAheadOfTime( |
| Isolate* isolate) { |
| StoreBufferOverflowStub stub1(isolate, kDontSaveFPRegs); |
| stub1.GetCode(); |
| StoreBufferOverflowStub stub2(isolate, kSaveFPRegs); |
| stub2.GetCode(); |
| } |
| |
| |
| void StoreRegistersStateStub::Generate(MacroAssembler* masm) { |
| MacroAssembler::NoUseRealAbortsScope no_use_real_aborts(masm); |
| UseScratchRegisterScope temps(masm); |
| Register saved_lr = temps.UnsafeAcquire(to_be_pushed_lr()); |
| Register return_address = temps.AcquireX(); |
| __ Mov(return_address, lr); |
| // Restore lr with the value it had before the call to this stub (the value |
| // which must be pushed). |
| __ Mov(lr, saved_lr); |
| __ PushSafepointRegisters(); |
| __ Ret(return_address); |
| } |
| |
| |
| void RestoreRegistersStateStub::Generate(MacroAssembler* masm) { |
| MacroAssembler::NoUseRealAbortsScope no_use_real_aborts(masm); |
| UseScratchRegisterScope temps(masm); |
| Register return_address = temps.AcquireX(); |
| // Preserve the return address (lr will be clobbered by the pop). |
| __ Mov(return_address, lr); |
| __ PopSafepointRegisters(); |
| __ Ret(return_address); |
| } |
| |
| |
| void MathPowStub::Generate(MacroAssembler* masm) { |
| // Stack on entry: |
| // jssp[0]: Exponent (as a tagged value). |
| // jssp[1]: Base (as a tagged value). |
| // |
| // The (tagged) result will be returned in x0, as a heap number. |
| |
| Register result_tagged = x0; |
| Register base_tagged = x10; |
| Register exponent_tagged = MathPowTaggedDescriptor::exponent(); |
| DCHECK(exponent_tagged.is(x11)); |
| Register exponent_integer = MathPowIntegerDescriptor::exponent(); |
| DCHECK(exponent_integer.is(x12)); |
| Register scratch1 = x14; |
| Register scratch0 = x15; |
| Register saved_lr = x19; |
| FPRegister result_double = d0; |
| FPRegister base_double = d0; |
| FPRegister exponent_double = d1; |
| FPRegister base_double_copy = d2; |
| FPRegister scratch1_double = d6; |
| FPRegister scratch0_double = d7; |
| |
| // A fast-path for integer exponents. |
| Label exponent_is_smi, exponent_is_integer; |
| // Bail out to runtime. |
| Label call_runtime; |
| // Allocate a heap number for the result, and return it. |
| Label done; |
| |
| // Unpack the inputs. |
| if (exponent_type() == ON_STACK) { |
| Label base_is_smi; |
| Label unpack_exponent; |
| |
| __ Pop(exponent_tagged, base_tagged); |
| |
| __ JumpIfSmi(base_tagged, &base_is_smi); |
| __ JumpIfNotHeapNumber(base_tagged, &call_runtime); |
| // base_tagged is a heap number, so load its double value. |
| __ Ldr(base_double, FieldMemOperand(base_tagged, HeapNumber::kValueOffset)); |
| __ B(&unpack_exponent); |
| __ Bind(&base_is_smi); |
| // base_tagged is a SMI, so untag it and convert it to a double. |
| __ SmiUntagToDouble(base_double, base_tagged); |
| |
| __ Bind(&unpack_exponent); |
| // x10 base_tagged The tagged base (input). |
| // x11 exponent_tagged The tagged exponent (input). |
| // d1 base_double The base as a double. |
| __ JumpIfSmi(exponent_tagged, &exponent_is_smi); |
| __ JumpIfNotHeapNumber(exponent_tagged, &call_runtime); |
| // exponent_tagged is a heap number, so load its double value. |
| __ Ldr(exponent_double, |
| FieldMemOperand(exponent_tagged, HeapNumber::kValueOffset)); |
| } else if (exponent_type() == TAGGED) { |
| __ JumpIfSmi(exponent_tagged, &exponent_is_smi); |
| __ Ldr(exponent_double, |
| FieldMemOperand(exponent_tagged, HeapNumber::kValueOffset)); |
| } |
| |
| // Handle double (heap number) exponents. |
| if (exponent_type() != INTEGER) { |
| // Detect integer exponents stored as doubles and handle those in the |
| // integer fast-path. |
| __ TryRepresentDoubleAsInt64(exponent_integer, exponent_double, |
| scratch0_double, &exponent_is_integer); |
| |
| if (exponent_type() == ON_STACK) { |
| FPRegister half_double = d3; |
| FPRegister minus_half_double = d4; |
| // Detect square root case. Crankshaft detects constant +/-0.5 at compile |
| // time and uses DoMathPowHalf instead. We then skip this check for |
| // non-constant cases of +/-0.5 as these hardly occur. |
| |
| __ Fmov(minus_half_double, -0.5); |
| __ Fmov(half_double, 0.5); |
| __ Fcmp(minus_half_double, exponent_double); |
| __ Fccmp(half_double, exponent_double, NZFlag, ne); |
| // Condition flags at this point: |
| // 0.5; nZCv // Identified by eq && pl |
| // -0.5: NZcv // Identified by eq && mi |
| // other: ?z?? // Identified by ne |
| __ B(ne, &call_runtime); |
| |
| // The exponent is 0.5 or -0.5. |
| |
| // Given that exponent is known to be either 0.5 or -0.5, the following |
| // special cases could apply (according to ECMA-262 15.8.2.13): |
| // |
| // base.isNaN(): The result is NaN. |
| // (base == +INFINITY) || (base == -INFINITY) |
| // exponent == 0.5: The result is +INFINITY. |
| // exponent == -0.5: The result is +0. |
| // (base == +0) || (base == -0) |
| // exponent == 0.5: The result is +0. |
| // exponent == -0.5: The result is +INFINITY. |
| // (base < 0) && base.isFinite(): The result is NaN. |
| // |
| // Fsqrt (and Fdiv for the -0.5 case) can handle all of those except |
| // where base is -INFINITY or -0. |
| |
| // Add +0 to base. This has no effect other than turning -0 into +0. |
| __ Fadd(base_double, base_double, fp_zero); |
| // The operation -0+0 results in +0 in all cases except where the |
| // FPCR rounding mode is 'round towards minus infinity' (RM). The |
| // ARM64 simulator does not currently simulate FPCR (where the rounding |
| // mode is set), so test the operation with some debug code. |
| if (masm->emit_debug_code()) { |
| UseScratchRegisterScope temps(masm); |
| Register temp = temps.AcquireX(); |
| __ Fneg(scratch0_double, fp_zero); |
| // Verify that we correctly generated +0.0 and -0.0. |
| // bits(+0.0) = 0x0000000000000000 |
| // bits(-0.0) = 0x8000000000000000 |
| __ Fmov(temp, fp_zero); |
| __ CheckRegisterIsClear(temp, kCouldNotGenerateZero); |
| __ Fmov(temp, scratch0_double); |
| __ Eor(temp, temp, kDSignMask); |
| __ CheckRegisterIsClear(temp, kCouldNotGenerateNegativeZero); |
| // Check that -0.0 + 0.0 == +0.0. |
| __ Fadd(scratch0_double, scratch0_double, fp_zero); |
| __ Fmov(temp, scratch0_double); |
| __ CheckRegisterIsClear(temp, kExpectedPositiveZero); |
| } |
| |
| // If base is -INFINITY, make it +INFINITY. |
| // * Calculate base - base: All infinities will become NaNs since both |
| // -INFINITY+INFINITY and +INFINITY-INFINITY are NaN in ARM64. |
| // * If the result is NaN, calculate abs(base). |
| __ Fsub(scratch0_double, base_double, base_double); |
| __ Fcmp(scratch0_double, 0.0); |
| __ Fabs(scratch1_double, base_double); |
| __ Fcsel(base_double, scratch1_double, base_double, vs); |
| |
| // Calculate the square root of base. |
| __ Fsqrt(result_double, base_double); |
| __ Fcmp(exponent_double, 0.0); |
| __ B(ge, &done); // Finish now for exponents of 0.5. |
| // Find the inverse for exponents of -0.5. |
| __ Fmov(scratch0_double, 1.0); |
| __ Fdiv(result_double, scratch0_double, result_double); |
| __ B(&done); |
| } |
| |
| { |
| AllowExternalCallThatCantCauseGC scope(masm); |
| __ Mov(saved_lr, lr); |
| __ CallCFunction( |
| ExternalReference::power_double_double_function(isolate()), |
| 0, 2); |
| __ Mov(lr, saved_lr); |
| __ B(&done); |
| } |
| |
| // Handle SMI exponents. |
| __ Bind(&exponent_is_smi); |
| // x10 base_tagged The tagged base (input). |
| // x11 exponent_tagged The tagged exponent (input). |
| // d1 base_double The base as a double. |
| __ SmiUntag(exponent_integer, exponent_tagged); |
| } |
| |
| __ Bind(&exponent_is_integer); |
| // x10 base_tagged The tagged base (input). |
| // x11 exponent_tagged The tagged exponent (input). |
| // x12 exponent_integer The exponent as an integer. |
| // d1 base_double The base as a double. |
| |
| // Find abs(exponent). For negative exponents, we can find the inverse later. |
| Register exponent_abs = x13; |
| __ Cmp(exponent_integer, 0); |
| __ Cneg(exponent_abs, exponent_integer, mi); |
| // x13 exponent_abs The value of abs(exponent_integer). |
| |
| // Repeatedly multiply to calculate the power. |
| // result = 1.0; |
| // For each bit n (exponent_integer{n}) { |
| // if (exponent_integer{n}) { |
| // result *= base; |
| // } |
| // base *= base; |
| // if (remaining bits in exponent_integer are all zero) { |
| // break; |
| // } |
| // } |
| Label power_loop, power_loop_entry, power_loop_exit; |
| __ Fmov(scratch1_double, base_double); |
| __ Fmov(base_double_copy, base_double); |
| __ Fmov(result_double, 1.0); |
| __ B(&power_loop_entry); |
| |
| __ Bind(&power_loop); |
| __ Fmul(scratch1_double, scratch1_double, scratch1_double); |
| __ Lsr(exponent_abs, exponent_abs, 1); |
| __ Cbz(exponent_abs, &power_loop_exit); |
| |
| __ Bind(&power_loop_entry); |
| __ Tbz(exponent_abs, 0, &power_loop); |
| __ Fmul(result_double, result_double, scratch1_double); |
| __ B(&power_loop); |
| |
| __ Bind(&power_loop_exit); |
| |
| // If the exponent was positive, result_double holds the result. |
| __ Tbz(exponent_integer, kXSignBit, &done); |
| |
| // The exponent was negative, so find the inverse. |
| __ Fmov(scratch0_double, 1.0); |
| __ Fdiv(result_double, scratch0_double, result_double); |
| // ECMA-262 only requires Math.pow to return an 'implementation-dependent |
| // approximation' of base^exponent. However, mjsunit/math-pow uses Math.pow |
| // to calculate the subnormal value 2^-1074. This method of calculating |
| // negative powers doesn't work because 2^1074 overflows to infinity. To |
| // catch this corner-case, we bail out if the result was 0. (This can only |
| // occur if the divisor is infinity or the base is zero.) |
| __ Fcmp(result_double, 0.0); |
| __ B(&done, ne); |
| |
| if (exponent_type() == ON_STACK) { |
| // Bail out to runtime code. |
| __ Bind(&call_runtime); |
| // Put the arguments back on the stack. |
| __ Push(base_tagged, exponent_tagged); |
| __ TailCallRuntime(Runtime::kMathPowRT); |
| |
| // Return. |
| __ Bind(&done); |
| __ AllocateHeapNumber(result_tagged, &call_runtime, scratch0, scratch1, |
| result_double); |
| DCHECK(result_tagged.is(x0)); |
| __ Ret(); |
| } else { |
| AllowExternalCallThatCantCauseGC scope(masm); |
| __ Mov(saved_lr, lr); |
| __ Fmov(base_double, base_double_copy); |
| __ Scvtf(exponent_double, exponent_integer); |
| __ CallCFunction( |
| ExternalReference::power_double_double_function(isolate()), |
| 0, 2); |
| __ Mov(lr, saved_lr); |
| __ Bind(&done); |
| __ Ret(); |
| } |
| } |
| |
| |
| void CodeStub::GenerateStubsAheadOfTime(Isolate* isolate) { |
| // It is important that the following stubs are generated in this order |
| // because pregenerated stubs can only call other pregenerated stubs. |
| // RecordWriteStub uses StoreBufferOverflowStub, which in turn uses |
| // CEntryStub. |
| CEntryStub::GenerateAheadOfTime(isolate); |
| StoreBufferOverflowStub::GenerateFixedRegStubsAheadOfTime(isolate); |
| StubFailureTrampolineStub::GenerateAheadOfTime(isolate); |
| ArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate); |
| CreateAllocationSiteStub::GenerateAheadOfTime(isolate); |
| CreateWeakCellStub::GenerateAheadOfTime(isolate); |
| BinaryOpICStub::GenerateAheadOfTime(isolate); |
| StoreRegistersStateStub::GenerateAheadOfTime(isolate); |
| RestoreRegistersStateStub::GenerateAheadOfTime(isolate); |
| BinaryOpICWithAllocationSiteStub::GenerateAheadOfTime(isolate); |
| StoreFastElementStub::GenerateAheadOfTime(isolate); |
| TypeofStub::GenerateAheadOfTime(isolate); |
| } |
| |
| |
| void StoreRegistersStateStub::GenerateAheadOfTime(Isolate* isolate) { |
| StoreRegistersStateStub stub(isolate); |
| stub.GetCode(); |
| } |
| |
| |
| void RestoreRegistersStateStub::GenerateAheadOfTime(Isolate* isolate) { |
| RestoreRegistersStateStub stub(isolate); |
| stub.GetCode(); |
| } |
| |
| |
| void CodeStub::GenerateFPStubs(Isolate* isolate) { |
| // Floating-point code doesn't get special handling in ARM64, so there's |
| // nothing to do here. |
| USE(isolate); |
| } |
| |
| |
| bool CEntryStub::NeedsImmovableCode() { |
| // CEntryStub stores the return address on the stack before calling into |
| // C++ code. In some cases, the VM accesses this address, but it is not used |
| // when the C++ code returns to the stub because LR holds the return address |
| // in AAPCS64. If the stub is moved (perhaps during a GC), we could end up |
| // returning to dead code. |
| // TODO(jbramley): Whilst this is the only analysis that makes sense, I can't |
| // find any comment to confirm this, and I don't hit any crashes whatever |
| // this function returns. The anaylsis should be properly confirmed. |
| return true; |
| } |
| |
| |
| void CEntryStub::GenerateAheadOfTime(Isolate* isolate) { |
| CEntryStub stub(isolate, 1, kDontSaveFPRegs); |
| stub.GetCode(); |
| CEntryStub stub_fp(isolate, 1, kSaveFPRegs); |
| stub_fp.GetCode(); |
| } |
| |
| |
| void CEntryStub::Generate(MacroAssembler* masm) { |
| // The Abort mechanism relies on CallRuntime, which in turn relies on |
| // CEntryStub, so until this stub has been generated, we have to use a |
| // fall-back Abort mechanism. |
| // |
| // Note that this stub must be generated before any use of Abort. |
| MacroAssembler::NoUseRealAbortsScope no_use_real_aborts(masm); |
| |
| ASM_LOCATION("CEntryStub::Generate entry"); |
| ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| |
| // Register parameters: |
| // x0: argc (including receiver, untagged) |
| // x1: target |
| // If argv_in_register(): |
| // x11: argv (pointer to first argument) |
| // |
| // The stack on entry holds the arguments and the receiver, with the receiver |
| // at the highest address: |
| // |
| // jssp]argc-1]: receiver |
| // jssp[argc-2]: arg[argc-2] |
| // ... ... |
| // jssp[1]: arg[1] |
| // jssp[0]: arg[0] |
| // |
| // The arguments are in reverse order, so that arg[argc-2] is actually the |
| // first argument to the target function and arg[0] is the last. |
| DCHECK(jssp.Is(__ StackPointer())); |
| const Register& argc_input = x0; |
| const Register& target_input = x1; |
| |
| // Calculate argv, argc and the target address, and store them in |
| // callee-saved registers so we can retry the call without having to reload |
| // these arguments. |
| // TODO(jbramley): If the first call attempt succeeds in the common case (as |
| // it should), then we might be better off putting these parameters directly |
| // into their argument registers, rather than using callee-saved registers and |
| // preserving them on the stack. |
| const Register& argv = x21; |
| const Register& argc = x22; |
| const Register& target = x23; |
| |
| // Derive argv from the stack pointer so that it points to the first argument |
| // (arg[argc-2]), or just below the receiver in case there are no arguments. |
| // - Adjust for the arg[] array. |
| Register temp_argv = x11; |
| if (!argv_in_register()) { |
| __ Add(temp_argv, jssp, Operand(x0, LSL, kPointerSizeLog2)); |
| // - Adjust for the receiver. |
| __ Sub(temp_argv, temp_argv, 1 * kPointerSize); |
| } |
| |
| // Reserve three slots to preserve x21-x23 callee-saved registers. If the |
| // result size is too large to be returned in registers then also reserve |
| // space for the return value. |
| int extra_stack_space = 3 + (result_size() <= 2 ? 0 : result_size()); |
| // Enter the exit frame. |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ EnterExitFrame(save_doubles(), x10, extra_stack_space); |
| DCHECK(csp.Is(__ StackPointer())); |
| |
| // Poke callee-saved registers into reserved space. |
| __ Poke(argv, 1 * kPointerSize); |
| __ Poke(argc, 2 * kPointerSize); |
| __ Poke(target, 3 * kPointerSize); |
| |
| if (result_size() > 2) { |
| // Save the location of the return value into x8 for call. |
| __ Add(x8, __ StackPointer(), Operand(4 * kPointerSize)); |
| } |
| |
| // We normally only keep tagged values in callee-saved registers, as they |
| // could be pushed onto the stack by called stubs and functions, and on the |
| // stack they can confuse the GC. However, we're only calling C functions |
| // which can push arbitrary data onto the stack anyway, and so the GC won't |
| // examine that part of the stack. |
| __ Mov(argc, argc_input); |
| __ Mov(target, target_input); |
| __ Mov(argv, temp_argv); |
| |
| // x21 : argv |
| // x22 : argc |
| // x23 : call target |
| // |
| // The stack (on entry) holds the arguments and the receiver, with the |
| // receiver at the highest address: |
| // |
| // argv[8]: receiver |
| // argv -> argv[0]: arg[argc-2] |
| // ... ... |
| // argv[...]: arg[1] |
| // argv[...]: arg[0] |
| // |
| // Immediately below (after) this is the exit frame, as constructed by |
| // EnterExitFrame: |
| // fp[8]: CallerPC (lr) |
| // fp -> fp[0]: CallerFP (old fp) |
| // fp[-8]: Space reserved for SPOffset. |
| // fp[-16]: CodeObject() |
| // csp[...]: Saved doubles, if saved_doubles is true. |
| // csp[32]: Alignment padding, if necessary. |
| // csp[24]: Preserved x23 (used for target). |
| // csp[16]: Preserved x22 (used for argc). |
| // csp[8]: Preserved x21 (used for argv). |
| // csp -> csp[0]: Space reserved for the return address. |
| // |
| // After a successful call, the exit frame, preserved registers (x21-x23) and |
| // the arguments (including the receiver) are dropped or popped as |
| // appropriate. The stub then returns. |
| // |
| // After an unsuccessful call, the exit frame and suchlike are left |
| // untouched, and the stub either throws an exception by jumping to one of |
| // the exception_returned label. |
| |
| DCHECK(csp.Is(__ StackPointer())); |
| |
| // Prepare AAPCS64 arguments to pass to the builtin. |
| __ Mov(x0, argc); |
| __ Mov(x1, argv); |
| __ Mov(x2, ExternalReference::isolate_address(isolate())); |
| |
| Label return_location; |
| __ Adr(x12, &return_location); |
| __ Poke(x12, 0); |
| |
| if (__ emit_debug_code()) { |
| // Verify that the slot below fp[kSPOffset]-8 points to the return location |
| // (currently in x12). |
| UseScratchRegisterScope temps(masm); |
| Register temp = temps.AcquireX(); |
| __ Ldr(temp, MemOperand(fp, ExitFrameConstants::kSPOffset)); |
| __ Ldr(temp, MemOperand(temp, -static_cast<int64_t>(kXRegSize))); |
| __ Cmp(temp, x12); |
| __ Check(eq, kReturnAddressNotFoundInFrame); |
| } |
| |
| // Call the builtin. |
| __ Blr(target); |
| __ Bind(&return_location); |
| |
| if (result_size() > 2) { |
| DCHECK_EQ(3, result_size()); |
| // Read result values stored on stack. |
| __ Ldr(x0, MemOperand(__ StackPointer(), 4 * kPointerSize)); |
| __ Ldr(x1, MemOperand(__ StackPointer(), 5 * kPointerSize)); |
| __ Ldr(x2, MemOperand(__ StackPointer(), 6 * kPointerSize)); |
| } |
| // Result returned in x0, x1:x0 or x2:x1:x0 - do not destroy these registers! |
| |
| // x0 result0 The return code from the call. |
| // x1 result1 For calls which return ObjectPair or ObjectTriple. |
| // x2 result2 For calls which return ObjectTriple. |
| // x21 argv |
| // x22 argc |
| // x23 target |
| const Register& result = x0; |
| |
| // Check result for exception sentinel. |
| Label exception_returned; |
| __ CompareRoot(result, Heap::kExceptionRootIndex); |
| __ B(eq, &exception_returned); |
| |
| // The call succeeded, so unwind the stack and return. |
| |
| // Restore callee-saved registers x21-x23. |
| __ Mov(x11, argc); |
| |
| __ Peek(argv, 1 * kPointerSize); |
| __ Peek(argc, 2 * kPointerSize); |
| __ Peek(target, 3 * kPointerSize); |
| |
| __ LeaveExitFrame(save_doubles(), x10, true); |
| DCHECK(jssp.Is(__ StackPointer())); |
| if (!argv_in_register()) { |
| // Drop the remaining stack slots and return from the stub. |
| __ Drop(x11); |
| } |
| __ AssertFPCRState(); |
| __ Ret(); |
| |
| // The stack pointer is still csp if we aren't returning, and the frame |
| // hasn't changed (except for the return address). |
| __ SetStackPointer(csp); |
| |
| // Handling of exception. |
| __ Bind(&exception_returned); |
| |
| ExternalReference pending_handler_context_address( |
| Isolate::kPendingHandlerContextAddress, isolate()); |
| ExternalReference pending_handler_code_address( |
| Isolate::kPendingHandlerCodeAddress, isolate()); |
| ExternalReference pending_handler_offset_address( |
| Isolate::kPendingHandlerOffsetAddress, isolate()); |
| ExternalReference pending_handler_fp_address( |
| Isolate::kPendingHandlerFPAddress, isolate()); |
| ExternalReference pending_handler_sp_address( |
| Isolate::kPendingHandlerSPAddress, isolate()); |
| |
| // Ask the runtime for help to determine the handler. This will set x0 to |
| // contain the current pending exception, don't clobber it. |
| ExternalReference find_handler(Runtime::kUnwindAndFindExceptionHandler, |
| isolate()); |
| DCHECK(csp.Is(masm->StackPointer())); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ Mov(x0, 0); // argc. |
| __ Mov(x1, 0); // argv. |
| __ Mov(x2, ExternalReference::isolate_address(isolate())); |
| __ CallCFunction(find_handler, 3); |
| } |
| |
| // We didn't execute a return case, so the stack frame hasn't been updated |
| // (except for the return address slot). However, we don't need to initialize |
| // jssp because the throw method will immediately overwrite it when it |
| // unwinds the stack. |
| __ SetStackPointer(jssp); |
| |
| // Retrieve the handler context, SP and FP. |
| __ Mov(cp, Operand(pending_handler_context_address)); |
| __ Ldr(cp, MemOperand(cp)); |
| __ Mov(jssp, Operand(pending_handler_sp_address)); |
| __ Ldr(jssp, MemOperand(jssp)); |
| __ Mov(fp, Operand(pending_handler_fp_address)); |
| __ Ldr(fp, MemOperand(fp)); |
| |
| // If the handler is a JS frame, restore the context to the frame. Note that |
| // the context will be set to (cp == 0) for non-JS frames. |
| Label not_js_frame; |
| __ Cbz(cp, ¬_js_frame); |
| __ Str(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| __ Bind(¬_js_frame); |
| |
| // Compute the handler entry address and jump to it. |
| __ Mov(x10, Operand(pending_handler_code_address)); |
| __ Ldr(x10, MemOperand(x10)); |
| __ Mov(x11, Operand(pending_handler_offset_address)); |
| __ Ldr(x11, MemOperand(x11)); |
| __ Add(x10, x10, Code::kHeaderSize - kHeapObjectTag); |
| __ Add(x10, x10, x11); |
| __ Br(x10); |
| } |
| |
| |
| // This is the entry point from C++. 5 arguments are provided in x0-x4. |
| // See use of the CALL_GENERATED_CODE macro for example in src/execution.cc. |
| // Input: |
| // x0: code entry. |
| // x1: function. |
| // x2: receiver. |
| // x3: argc. |
| // x4: argv. |
| // Output: |
| // x0: result. |
| void JSEntryStub::Generate(MacroAssembler* masm) { |
| DCHECK(jssp.Is(__ StackPointer())); |
| Register code_entry = x0; |
| |
| // Enable instruction instrumentation. This only works on the simulator, and |
| // will have no effect on the model or real hardware. |
| __ EnableInstrumentation(); |
| |
| Label invoke, handler_entry, exit; |
| |
| // Push callee-saved registers and synchronize the system stack pointer (csp) |
| // and the JavaScript stack pointer (jssp). |
| // |
| // We must not write to jssp until after the PushCalleeSavedRegisters() |
| // call, since jssp is itself a callee-saved register. |
| __ SetStackPointer(csp); |
| __ PushCalleeSavedRegisters(); |
| __ Mov(jssp, csp); |
| __ SetStackPointer(jssp); |
| |
| // Configure the FPCR. We don't restore it, so this is technically not allowed |
| // according to AAPCS64. However, we only set default-NaN mode and this will |
| // be harmless for most C code. Also, it works for ARM. |
| __ ConfigureFPCR(); |
| |
| ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| |
| // Set up the reserved register for 0.0. |
| __ Fmov(fp_zero, 0.0); |
| |
| // Build an entry frame (see layout below). |
| int marker = type(); |
| int64_t bad_frame_pointer = -1L; // Bad frame pointer to fail if it is used. |
| __ Mov(x13, bad_frame_pointer); |
| __ Mov(x12, Smi::FromInt(marker)); |
| __ Mov(x11, ExternalReference(Isolate::kCEntryFPAddress, isolate())); |
| __ Ldr(x10, MemOperand(x11)); |
| |
| __ Push(x13, xzr, x12, x10); |
| // Set up fp. |
| __ Sub(fp, jssp, EntryFrameConstants::kCallerFPOffset); |
| |
| // Push the JS entry frame marker. Also set js_entry_sp if this is the |
| // outermost JS call. |
| Label non_outermost_js, done; |
| ExternalReference js_entry_sp(Isolate::kJSEntrySPAddress, isolate()); |
| __ Mov(x10, ExternalReference(js_entry_sp)); |
| __ Ldr(x11, MemOperand(x10)); |
| __ Cbnz(x11, &non_outermost_js); |
| __ Str(fp, MemOperand(x10)); |
| __ Mov(x12, Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME)); |
| __ Push(x12); |
| __ B(&done); |
| __ Bind(&non_outermost_js); |
| // We spare one instruction by pushing xzr since the marker is 0. |
| DCHECK(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME) == NULL); |
| __ Push(xzr); |
| __ Bind(&done); |
| |
| // The frame set up looks like this: |
| // jssp[0] : JS entry frame marker. |
| // jssp[1] : C entry FP. |
| // jssp[2] : stack frame marker. |
| // jssp[3] : stack frmae marker. |
| // jssp[4] : bad frame pointer 0xfff...ff <- fp points here. |
| |
| |
| // Jump to a faked try block that does the invoke, with a faked catch |
| // block that sets the pending exception. |
| __ B(&invoke); |
| |
| // Prevent the constant pool from being emitted between the record of the |
| // handler_entry position and the first instruction of the sequence here. |
| // There is no risk because Assembler::Emit() emits the instruction before |
| // checking for constant pool emission, but we do not want to depend on |
| // that. |
| { |
| Assembler::BlockPoolsScope block_pools(masm); |
| __ bind(&handler_entry); |
| handler_offset_ = handler_entry.pos(); |
| // Caught exception: Store result (exception) in the pending exception |
| // field in the JSEnv and return a failure sentinel. Coming in here the |
| // fp will be invalid because the PushTryHandler below sets it to 0 to |
| // signal the existence of the JSEntry frame. |
| __ Mov(x10, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
| isolate()))); |
| } |
| __ Str(code_entry, MemOperand(x10)); |
| __ LoadRoot(x0, Heap::kExceptionRootIndex); |
| __ B(&exit); |
| |
| // Invoke: Link this frame into the handler chain. |
| __ Bind(&invoke); |
| __ PushStackHandler(); |
| // If an exception not caught by another handler occurs, this handler |
| // returns control to the code after the B(&invoke) above, which |
| // restores all callee-saved registers (including cp and fp) to their |
| // saved values before returning a failure to C. |
| |
| // Clear any pending exceptions. |
| __ Mov(x10, Operand(isolate()->factory()->the_hole_value())); |
| __ Mov(x11, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
| isolate()))); |
| __ Str(x10, MemOperand(x11)); |
| |
| // Invoke the function by calling through the JS entry trampoline builtin. |
| // Notice that we cannot store a reference to the trampoline code directly in |
| // this stub, because runtime stubs are not traversed when doing GC. |
| |
| // Expected registers by Builtins::JSEntryTrampoline |
| // x0: code entry. |
| // x1: function. |
| // x2: receiver. |
| // x3: argc. |
| // x4: argv. |
| ExternalReference entry(type() == StackFrame::ENTRY_CONSTRUCT |
| ? Builtins::kJSConstructEntryTrampoline |
| : Builtins::kJSEntryTrampoline, |
| isolate()); |
| __ Mov(x10, entry); |
| |
| // Call the JSEntryTrampoline. |
| __ Ldr(x11, MemOperand(x10)); // Dereference the address. |
| __ Add(x12, x11, Code::kHeaderSize - kHeapObjectTag); |
| __ Blr(x12); |
| |
| // Unlink this frame from the handler chain. |
| __ PopStackHandler(); |
| |
| |
| __ Bind(&exit); |
| // x0 holds the result. |
| // The stack pointer points to the top of the entry frame pushed on entry from |
| // C++ (at the beginning of this stub): |
| // jssp[0] : JS entry frame marker. |
| // jssp[1] : C entry FP. |
| // jssp[2] : stack frame marker. |
| // jssp[3] : stack frmae marker. |
| // jssp[4] : bad frame pointer 0xfff...ff <- fp points here. |
| |
| // Check if the current stack frame is marked as the outermost JS frame. |
| Label non_outermost_js_2; |
| __ Pop(x10); |
| __ Cmp(x10, Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME)); |
| __ B(ne, &non_outermost_js_2); |
| __ Mov(x11, ExternalReference(js_entry_sp)); |
| __ Str(xzr, MemOperand(x11)); |
| __ Bind(&non_outermost_js_2); |
| |
| // Restore the top frame descriptors from the stack. |
| __ Pop(x10); |
| __ Mov(x11, ExternalReference(Isolate::kCEntryFPAddress, isolate())); |
| __ Str(x10, MemOperand(x11)); |
| |
| // Reset the stack to the callee saved registers. |
| __ Drop(-EntryFrameConstants::kCallerFPOffset, kByteSizeInBytes); |
| // Restore the callee-saved registers and return. |
| DCHECK(jssp.Is(__ StackPointer())); |
| __ Mov(csp, jssp); |
| __ SetStackPointer(csp); |
| __ PopCalleeSavedRegisters(); |
| // After this point, we must not modify jssp because it is a callee-saved |
| // register which we have just restored. |
| __ Ret(); |
| } |
| |
| |
| void FunctionPrototypeStub::Generate(MacroAssembler* masm) { |
| Label miss; |
| Register receiver = LoadDescriptor::ReceiverRegister(); |
| // Ensure that the vector and slot registers won't be clobbered before |
| // calling the miss handler. |
| DCHECK(!AreAliased(x10, x11, LoadWithVectorDescriptor::VectorRegister(), |
| LoadWithVectorDescriptor::SlotRegister())); |
| |
| NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype(masm, receiver, x10, |
| x11, &miss); |
| |
| __ Bind(&miss); |
| PropertyAccessCompiler::TailCallBuiltin( |
| masm, PropertyAccessCompiler::MissBuiltin(Code::LOAD_IC)); |
| } |
| |
| |
| void LoadIndexedStringStub::Generate(MacroAssembler* masm) { |
| // Return address is in lr. |
| Label miss; |
| |
| Register receiver = LoadDescriptor::ReceiverRegister(); |
| Register index = LoadDescriptor::NameRegister(); |
| Register result = x0; |
| Register scratch = x10; |
| DCHECK(!scratch.is(receiver) && !scratch.is(index)); |
| DCHECK(!scratch.is(LoadWithVectorDescriptor::VectorRegister()) && |
| result.is(LoadWithVectorDescriptor::SlotRegister())); |
| |
| // StringCharAtGenerator doesn't use the result register until it's passed |
| // the different miss possibilities. If it did, we would have a conflict |
| // when FLAG_vector_ics is true. |
| StringCharAtGenerator char_at_generator(receiver, index, scratch, result, |
| &miss, // When not a string. |
| &miss, // When not a number. |
| &miss, // When index out of range. |
| STRING_INDEX_IS_ARRAY_INDEX, |
| RECEIVER_IS_STRING); |
| char_at_generator.GenerateFast(masm); |
| __ Ret(); |
| |
| StubRuntimeCallHelper call_helper; |
| char_at_generator.GenerateSlow(masm, PART_OF_IC_HANDLER, call_helper); |
| |
| __ Bind(&miss); |
| PropertyAccessCompiler::TailCallBuiltin( |
| masm, PropertyAccessCompiler::MissBuiltin(Code::KEYED_LOAD_IC)); |
| } |
| |
| |
| void InstanceOfStub::Generate(MacroAssembler* masm) { |
| Register const object = x1; // Object (lhs). |
| Register const function = x0; // Function (rhs). |
| Register const object_map = x2; // Map of {object}. |
| Register const function_map = x3; // Map of {function}. |
| Register const function_prototype = x4; // Prototype of {function}. |
| Register const scratch = x5; |
| |
| DCHECK(object.is(InstanceOfDescriptor::LeftRegister())); |
| DCHECK(function.is(InstanceOfDescriptor::RightRegister())); |
| |
| // Check if {object} is a smi. |
| Label object_is_smi; |
| __ JumpIfSmi(object, &object_is_smi); |
| |
| // Lookup the {function} and the {object} map in the global instanceof cache. |
| // Note: This is safe because we clear the global instanceof cache whenever |
| // we change the prototype of any object. |
| Label fast_case, slow_case; |
| __ Ldr(object_map, FieldMemOperand(object, HeapObject::kMapOffset)); |
| __ JumpIfNotRoot(function, Heap::kInstanceofCacheFunctionRootIndex, |
| &fast_case); |
| __ JumpIfNotRoot(object_map, Heap::kInstanceofCacheMapRootIndex, &fast_case); |
| __ LoadRoot(x0, Heap::kInstanceofCacheAnswerRootIndex); |
| __ Ret(); |
| |
| // If {object} is a smi we can safely return false if {function} is a JS |
| // function, otherwise we have to miss to the runtime and throw an exception. |
| __ Bind(&object_is_smi); |
| __ JumpIfSmi(function, &slow_case); |
| __ JumpIfNotObjectType(function, function_map, scratch, JS_FUNCTION_TYPE, |
| &slow_case); |
| __ LoadRoot(x0, Heap::kFalseValueRootIndex); |
| __ Ret(); |
| |
| // Fast-case: The {function} must be a valid JSFunction. |
| __ Bind(&fast_case); |
| __ JumpIfSmi(function, &slow_case); |
| __ JumpIfNotObjectType(function, function_map, scratch, JS_FUNCTION_TYPE, |
| &slow_case); |
| |
| // Ensure that {function} has an instance prototype. |
| __ Ldrb(scratch, FieldMemOperand(function_map, Map::kBitFieldOffset)); |
| __ Tbnz(scratch, Map::kHasNonInstancePrototype, &slow_case); |
| |
| // Get the "prototype" (or initial map) of the {function}. |
| __ Ldr(function_prototype, |
| FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| __ AssertNotSmi(function_prototype); |
| |
| // Resolve the prototype if the {function} has an initial map. Afterwards the |
| // {function_prototype} will be either the JSReceiver prototype object or the |
| // hole value, which means that no instances of the {function} were created so |
| // far and hence we should return false. |
| Label function_prototype_valid; |
| __ JumpIfNotObjectType(function_prototype, scratch, scratch, MAP_TYPE, |
| &function_prototype_valid); |
| __ Ldr(function_prototype, |
| FieldMemOperand(function_prototype, Map::kPrototypeOffset)); |
| __ Bind(&function_prototype_valid); |
| __ AssertNotSmi(function_prototype); |
| |
| // Update the global instanceof cache with the current {object} map and |
| // {function}. The cached answer will be set when it is known below. |
| __ StoreRoot(function, Heap::kInstanceofCacheFunctionRootIndex); |
| __ StoreRoot(object_map, Heap::kInstanceofCacheMapRootIndex); |
| |
| // Loop through the prototype chain looking for the {function} prototype. |
| // Assume true, and change to false if not found. |
| Register const object_instance_type = function_map; |
| Register const map_bit_field = function_map; |
| Register const null = scratch; |
| Register const result = x0; |
| |
| Label done, loop, fast_runtime_fallback; |
| __ LoadRoot(result, Heap::kTrueValueRootIndex); |
| __ LoadRoot(null, Heap::kNullValueRootIndex); |
| __ Bind(&loop); |
| |
| // Check if the object needs to be access checked. |
| __ Ldrb(map_bit_field, FieldMemOperand(object_map, Map::kBitFieldOffset)); |
| __ TestAndBranchIfAnySet(map_bit_field, 1 << Map::kIsAccessCheckNeeded, |
| &fast_runtime_fallback); |
| // Check if the current object is a Proxy. |
| __ CompareInstanceType(object_map, object_instance_type, JS_PROXY_TYPE); |
| __ B(eq, &fast_runtime_fallback); |
| |
| __ Ldr(object, FieldMemOperand(object_map, Map::kPrototypeOffset)); |
| __ Cmp(object, function_prototype); |
| __ B(eq, &done); |
| __ Cmp(object, null); |
| __ Ldr(object_map, FieldMemOperand(object, HeapObject::kMapOffset)); |
| __ B(ne, &loop); |
| __ LoadRoot(result, Heap::kFalseValueRootIndex); |
| __ Bind(&done); |
| __ StoreRoot(result, Heap::kInstanceofCacheAnswerRootIndex); |
| __ Ret(); |
| |
| // Found Proxy or access check needed: Call the runtime |
| __ Bind(&fast_runtime_fallback); |
| __ Push(object, function_prototype); |
| // Invalidate the instanceof cache. |
| __ Move(scratch, Smi::FromInt(0)); |
| __ StoreRoot(scratch, Heap::kInstanceofCacheFunctionRootIndex); |
| __ TailCallRuntime(Runtime::kHasInPrototypeChain); |
| |
| // Slow-case: Call the %InstanceOf runtime function. |
| __ bind(&slow_case); |
| __ Push(object, function); |
| __ TailCallRuntime(Runtime::kInstanceOf); |
| } |
| |
| |
| void LoadIndexedInterceptorStub::Generate(MacroAssembler* masm) { |
| // Return address is in lr. |
| Label slow; |
| |
| Register receiver = LoadDescriptor::ReceiverRegister(); |
| Register key = LoadDescriptor::NameRegister(); |
| |
| // Check that the key is an array index, that is Uint32. |
| __ TestAndBranchIfAnySet(key, kSmiTagMask | kSmiSignMask, &slow); |
| |
| // Everything is fine, call runtime. |
| __ Push(receiver, key); |
| __ TailCallRuntime(Runtime::kLoadElementWithInterceptor); |
| |
| __ Bind(&slow); |
| PropertyAccessCompiler::TailCallBuiltin( |
| masm, PropertyAccessCompiler::MissBuiltin(Code::KEYED_LOAD_IC)); |
| } |
| |
| |
| void RegExpExecStub::Generate(MacroAssembler* masm) { |
| #ifdef V8_INTERPRETED_REGEXP |
| __ TailCallRuntime(Runtime::kRegExpExec); |
| #else // V8_INTERPRETED_REGEXP |
| |
| // Stack frame on entry. |
| // jssp[0]: last_match_info (expected JSArray) |
| // jssp[8]: previous index |
| // jssp[16]: subject string |
| // jssp[24]: JSRegExp object |
| Label runtime; |
| |
| // Use of registers for this function. |
| |
| // Variable registers: |
| // x10-x13 used as scratch registers |
| // w0 string_type type of subject string |
| // x2 jsstring_length subject string length |
| // x3 jsregexp_object JSRegExp object |
| // w4 string_encoding Latin1 or UC16 |
| // w5 sliced_string_offset if the string is a SlicedString |
| // offset to the underlying string |
| // w6 string_representation groups attributes of the string: |
| // - is a string |
| // - type of the string |
| // - is a short external string |
| Register string_type = w0; |
| Register jsstring_length = x2; |
| Register jsregexp_object = x3; |
| Register string_encoding = w4; |
| Register sliced_string_offset = w5; |
| Register string_representation = w6; |
| |
| // These are in callee save registers and will be preserved by the call |
| // to the native RegExp code, as this code is called using the normal |
| // C calling convention. When calling directly from generated code the |
| // native RegExp code will not do a GC and therefore the content of |
| // these registers are safe to use after the call. |
| |
| // x19 subject subject string |
| // x20 regexp_data RegExp data (FixedArray) |
| // x21 last_match_info_elements info relative to the last match |
| // (FixedArray) |
| // x22 code_object generated regexp code |
| Register subject = x19; |
| Register regexp_data = x20; |
| Register last_match_info_elements = x21; |
| Register code_object = x22; |
| |
| // Stack frame. |
| // jssp[00]: last_match_info (JSArray) |
| // jssp[08]: previous index |
| // jssp[16]: subject string |
| // jssp[24]: JSRegExp object |
| |
| const int kLastMatchInfoOffset = 0 * kPointerSize; |
| const int kPreviousIndexOffset = 1 * kPointerSize; |
| const int kSubjectOffset = 2 * kPointerSize; |
| const int kJSRegExpOffset = 3 * kPointerSize; |
| |
| // Ensure that a RegExp stack is allocated. |
| ExternalReference address_of_regexp_stack_memory_address = |
| ExternalReference::address_of_regexp_stack_memory_address(isolate()); |
| ExternalReference address_of_regexp_stack_memory_size = |
| ExternalReference::address_of_regexp_stack_memory_size(isolate()); |
| __ Mov(x10, address_of_regexp_stack_memory_size); |
| __ Ldr(x10, MemOperand(x10)); |
| __ Cbz(x10, &runtime); |
| |
| // Check that the first argument is a JSRegExp object. |
| DCHECK(jssp.Is(__ StackPointer())); |
| __ Peek(jsregexp_object, kJSRegExpOffset); |
| __ JumpIfSmi(jsregexp_object, &runtime); |
| __ JumpIfNotObjectType(jsregexp_object, x10, x10, JS_REGEXP_TYPE, &runtime); |
| |
| // Check that the RegExp has been compiled (data contains a fixed array). |
| __ Ldr(regexp_data, FieldMemOperand(jsregexp_object, JSRegExp::kDataOffset)); |
| if (FLAG_debug_code) { |
| STATIC_ASSERT(kSmiTag == 0); |
| __ Tst(regexp_data, kSmiTagMask); |
| __ Check(ne, kUnexpectedTypeForRegExpDataFixedArrayExpected); |
| __ CompareObjectType(regexp_data, x10, x10, FIXED_ARRAY_TYPE); |
| __ Check(eq, kUnexpectedTypeForRegExpDataFixedArrayExpected); |
| } |
| |
| // Check the type of the RegExp. Only continue if type is JSRegExp::IRREGEXP. |
| __ Ldr(x10, FieldMemOperand(regexp_data, JSRegExp::kDataTagOffset)); |
| __ Cmp(x10, Smi::FromInt(JSRegExp::IRREGEXP)); |
| __ B(ne, &runtime); |
| |
| // Check that the number of captures fit in the static offsets vector buffer. |
| // We have always at least one capture for the whole match, plus additional |
| // ones due to capturing parentheses. A capture takes 2 registers. |
| // The number of capture registers then is (number_of_captures + 1) * 2. |
| __ Ldrsw(x10, |
| UntagSmiFieldMemOperand(regexp_data, |
| JSRegExp::kIrregexpCaptureCountOffset)); |
| // Check (number_of_captures + 1) * 2 <= offsets vector size |
| // number_of_captures * 2 <= offsets vector size - 2 |
| STATIC_ASSERT(Isolate::kJSRegexpStaticOffsetsVectorSize >= 2); |
| __ Add(x10, x10, x10); |
| __ Cmp(x10, Isolate::kJSRegexpStaticOffsetsVectorSize - 2); |
| __ B(hi, &runtime); |
| |
| // Initialize offset for possibly sliced string. |
| __ Mov(sliced_string_offset, 0); |
| |
| DCHECK(jssp.Is(__ StackPointer())); |
| __ Peek(subject, kSubjectOffset); |
| __ JumpIfSmi(subject, &runtime); |
| |
| __ Ldr(jsstring_length, FieldMemOperand(subject, String::kLengthOffset)); |
| |
| // Handle subject string according to its encoding and representation: |
| // (1) Sequential string? If yes, go to (4). |
| // (2) Sequential or cons? If not, go to (5). |
| // (3) Cons string. If the string is flat, replace subject with first string |
| // and go to (1). Otherwise bail out to runtime. |
| // (4) Sequential string. Load regexp code according to encoding. |
| // (E) Carry on. |
| /// [...] |
| |
| // Deferred code at the end of the stub: |
| // (5) Long external string? If not, go to (7). |
| // (6) External string. Make it, offset-wise, look like a sequential string. |
| // Go to (4). |
| // (7) Short external string or not a string? If yes, bail out to runtime. |
| // (8) Sliced string. Replace subject with parent. Go to (1). |
| |
| Label check_underlying; // (1) |
| Label seq_string; // (4) |
| Label not_seq_nor_cons; // (5) |
| Label external_string; // (6) |
| Label not_long_external; // (7) |
| |
| __ Bind(&check_underlying); |
| __ Ldr(x10, FieldMemOperand(subject, HeapObject::kMapOffset)); |
| __ Ldrb(string_type, FieldMemOperand(x10, Map::kInstanceTypeOffset)); |
| |
| // (1) Sequential string? If yes, go to (4). |
| __ And(string_representation, |
| string_type, |
| kIsNotStringMask | |
| kStringRepresentationMask | |
| kShortExternalStringMask); |
| // We depend on the fact that Strings of type |
| // SeqString and not ShortExternalString are defined |
| // by the following pattern: |
| // string_type: 0XX0 XX00 |
| // ^ ^ ^^ |
| // | | || |
| // | | is a SeqString |
| // | is not a short external String |
| // is a String |
| STATIC_ASSERT((kStringTag | kSeqStringTag) == 0); |
| STATIC_ASSERT(kShortExternalStringTag != 0); |
| __ Cbz(string_representation, &seq_string); // Go to (4). |
| |
| // (2) Sequential or cons? If not, go to (5). |
| STATIC_ASSERT(kConsStringTag < kExternalStringTag); |
| STATIC_ASSERT(kSlicedStringTag > kExternalStringTag); |
| STATIC_ASSERT(kIsNotStringMask > kExternalStringTag); |
| STATIC_ASSERT(kShortExternalStringTag > kExternalStringTag); |
| __ Cmp(string_representation, kExternalStringTag); |
| __ B(ge, ¬_seq_nor_cons); // Go to (5). |
| |
| // (3) Cons string. Check that it's flat. |
| __ Ldr(x10, FieldMemOperand(subject, ConsString::kSecondOffset)); |
| __ JumpIfNotRoot(x10, Heap::kempty_stringRootIndex, &runtime); |
| // Replace subject with first string. |
| __ Ldr(subject, FieldMemOperand(subject, ConsString::kFirstOffset)); |
| __ B(&check_underlying); |
| |
| // (4) Sequential string. Load regexp code according to encoding. |
| __ Bind(&seq_string); |
| |
| // Check that the third argument is a positive smi less than the subject |
| // string length. A negative value will be greater (unsigned comparison). |
| DCHECK(jssp.Is(__ StackPointer())); |
| __ Peek(x10, kPreviousIndexOffset); |
| __ JumpIfNotSmi(x10, &runtime); |
| __ Cmp(jsstring_length, x10); |
| __ B(ls, &runtime); |
| |
| // Argument 2 (x1): We need to load argument 2 (the previous index) into x1 |
| // before entering the exit frame. |
| __ SmiUntag(x1, x10); |
| |
| // The third bit determines the string encoding in string_type. |
| STATIC_ASSERT(kOneByteStringTag == 0x04); |
| STATIC_ASSERT(kTwoByteStringTag == 0x00); |
| STATIC_ASSERT(kStringEncodingMask == 0x04); |
| |
| // Find the code object based on the assumptions above. |
| // kDataOneByteCodeOffset and kDataUC16CodeOffset are adjacent, adds an offset |
| // of kPointerSize to reach the latter. |
| STATIC_ASSERT(JSRegExp::kDataOneByteCodeOffset + kPointerSize == |
| JSRegExp::kDataUC16CodeOffset); |
| __ Mov(x10, kPointerSize); |
| // We will need the encoding later: Latin1 = 0x04 |
| // UC16 = 0x00 |
| __ Ands(string_encoding, string_type, kStringEncodingMask); |
| __ CzeroX(x10, ne); |
| __ Add(x10, regexp_data, x10); |
| __ Ldr(code_object, FieldMemOperand(x10, JSRegExp::kDataOneByteCodeOffset)); |
| |
| // (E) Carry on. String handling is done. |
| |
| // Check that the irregexp code has been generated for the actual string |
| // encoding. If it has, the field contains a code object otherwise it contains |
| // a smi (code flushing support). |
| __ JumpIfSmi(code_object, &runtime); |
| |
| // All checks done. Now push arguments for native regexp code. |
| __ IncrementCounter(isolate()->counters()->regexp_entry_native(), 1, |
| x10, |
| x11); |
| |
| // Isolates: note we add an additional parameter here (isolate pointer). |
| __ EnterExitFrame(false, x10, 1); |
| DCHECK(csp.Is(__ StackPointer())); |
| |
| // We have 9 arguments to pass to the regexp code, therefore we have to pass |
| // one on the stack and the rest as registers. |
| |
| // Note that the placement of the argument on the stack isn't standard |
| // AAPCS64: |
| // csp[0]: Space for the return address placed by DirectCEntryStub. |
| // csp[8]: Argument 9, the current isolate address. |
| |
| __ Mov(x10, ExternalReference::isolate_address(isolate())); |
| __ Poke(x10, kPointerSize); |
| |
| Register length = w11; |
| Register previous_index_in_bytes = w12; |
| Register start = x13; |
| |
| // Load start of the subject string. |
| __ Add(start, subject, SeqString::kHeaderSize - kHeapObjectTag); |
| // Load the length from the original subject string from the previous stack |
| // frame. Therefore we have to use fp, which points exactly to two pointer |
| // sizes below the previous sp. (Because creating a new stack frame pushes |
| // the previous fp onto the stack and decrements sp by 2 * kPointerSize.) |
| __ Ldr(subject, MemOperand(fp, kSubjectOffset + 2 * kPointerSize)); |
| __ Ldr(length, UntagSmiFieldMemOperand(subject, String::kLengthOffset)); |
| |
| // Handle UC16 encoding, two bytes make one character. |
| // string_encoding: if Latin1: 0x04 |
| // if UC16: 0x00 |
| STATIC_ASSERT(kStringEncodingMask == 0x04); |
| __ Ubfx(string_encoding, string_encoding, 2, 1); |
| __ Eor(string_encoding, string_encoding, 1); |
| // string_encoding: if Latin1: 0 |
| // if UC16: 1 |
| |
| // Convert string positions from characters to bytes. |
| // Previous index is in x1. |
| __ Lsl(previous_index_in_bytes, w1, string_encoding); |
| __ Lsl(length, length, string_encoding); |
| __ Lsl(sliced_string_offset, sliced_string_offset, string_encoding); |
| |
| // Argument 1 (x0): Subject string. |
| __ Mov(x0, subject); |
| |
| // Argument 2 (x1): Previous index, already there. |
| |
| // Argument 3 (x2): Get the start of input. |
| // Start of input = start of string + previous index + substring offset |
| // (0 if the string |
| // is not sliced). |
| __ Add(w10, previous_index_in_bytes, sliced_string_offset); |
| __ Add(x2, start, Operand(w10, UXTW)); |
| |
| // Argument 4 (x3): |
| // End of input = start of input + (length of input - previous index) |
| __ Sub(w10, length, previous_index_in_bytes); |
| __ Add(x3, x2, Operand(w10, UXTW)); |
| |
| // Argument 5 (x4): static offsets vector buffer. |
| __ Mov(x4, ExternalReference::address_of_static_offsets_vector(isolate())); |
| |
| // Argument 6 (x5): Set the number of capture registers to zero to force |
| // global regexps to behave as non-global. This stub is not used for global |
| // regexps. |
| __ Mov(x5, 0); |
| |
| // Argument 7 (x6): Start (high end) of backtracking stack memory area. |
| __ Mov(x10, address_of_regexp_stack_memory_address); |
| __ Ldr(x10, MemOperand(x10)); |
| __ Mov(x11, address_of_regexp_stack_memory_size); |
| __ Ldr(x11, MemOperand(x11)); |
| __ Add(x6, x10, x11); |
| |
| // Argument 8 (x7): Indicate that this is a direct call from JavaScript. |
| __ Mov(x7, 1); |
| |
| // Locate the code entry and call it. |
| __ Add(code_object, code_object, Code::kHeaderSize - kHeapObjectTag); |
| DirectCEntryStub stub(isolate()); |
| stub.GenerateCall(masm, code_object); |
| |
| __ LeaveExitFrame(false, x10, true); |
| |
| // The generated regexp code returns an int32 in w0. |
| Label failure, exception; |
| __ CompareAndBranch(w0, NativeRegExpMacroAssembler::FAILURE, eq, &failure); |
| __ CompareAndBranch(w0, |
| NativeRegExpMacroAssembler::EXCEPTION, |
| eq, |
| &exception); |
| __ CompareAndBranch(w0, NativeRegExpMacroAssembler::RETRY, eq, &runtime); |
| |
| // Success: process the result from the native regexp code. |
| Register number_of_capture_registers = x12; |
| |
| // Calculate number of capture registers (number_of_captures + 1) * 2 |
| // and store it in the last match info. |
| __ Ldrsw(x10, |
| UntagSmiFieldMemOperand(regexp_data, |
| JSRegExp::kIrregexpCaptureCountOffset)); |
| __ Add(x10, x10, x10); |
| __ Add(number_of_capture_registers, x10, 2); |
| |
| // Check that the fourth object is a JSArray object. |
| DCHECK(jssp.Is(__ StackPointer())); |
| __ Peek(x10, kLastMatchInfoOffset); |
| __ JumpIfSmi(x10, &runtime); |
| __ JumpIfNotObjectType(x10, x11, x11, JS_ARRAY_TYPE, &runtime); |
| |
| // Check that the JSArray is the fast case. |
| __ Ldr(last_match_info_elements, |
| FieldMemOperand(x10, JSArray::kElementsOffset)); |
| __ Ldr(x10, |
| FieldMemOperand(last_match_info_elements, HeapObject::kMapOffset)); |
| __ JumpIfNotRoot(x10, Heap::kFixedArrayMapRootIndex, &runtime); |
| |
| // Check that the last match info has space for the capture registers and the |
| // additional information (overhead). |
| // (number_of_captures + 1) * 2 + overhead <= last match info size |
| // (number_of_captures * 2) + 2 + overhead <= last match info size |
| // number_of_capture_registers + overhead <= last match info size |
| __ Ldrsw(x10, |
| UntagSmiFieldMemOperand(last_match_info_elements, |
| FixedArray::kLengthOffset)); |
| __ Add(x11, number_of_capture_registers, RegExpImpl::kLastMatchOverhead); |
| __ Cmp(x11, x10); |
| __ B(gt, &runtime); |
| |
| // Store the capture count. |
| __ SmiTag(x10, number_of_capture_registers); |
| __ Str(x10, |
| FieldMemOperand(last_match_info_elements, |
| RegExpImpl::kLastCaptureCountOffset)); |
| // Store last subject and last input. |
| __ Str(subject, |
| FieldMemOperand(last_match_info_elements, |
| RegExpImpl::kLastSubjectOffset)); |
| // Use x10 as the subject string in order to only need |
| // one RecordWriteStub. |
| __ Mov(x10, subject); |
| __ RecordWriteField(last_match_info_elements, |
| RegExpImpl::kLastSubjectOffset, |
| x10, |
| x11, |
| kLRHasNotBeenSaved, |
| kDontSaveFPRegs); |
| __ Str(subject, |
| FieldMemOperand(last_match_info_elements, |
| RegExpImpl::kLastInputOffset)); |
| __ Mov(x10, subject); |
| __ RecordWriteField(last_match_info_elements, |
| RegExpImpl::kLastInputOffset, |
| x10, |
| x11, |
| kLRHasNotBeenSaved, |
| kDontSaveFPRegs); |
| |
| Register last_match_offsets = x13; |
| Register offsets_vector_index = x14; |
| Register current_offset = x15; |
| |
| // Get the static offsets vector filled by the native regexp code |
| // and fill the last match info. |
| ExternalReference address_of_static_offsets_vector = |
| ExternalReference::address_of_static_offsets_vector(isolate()); |
| __ Mov(offsets_vector_index, address_of_static_offsets_vector); |
| |
| Label next_capture, done; |
| // Capture register counter starts from number of capture registers and |
| // iterates down to zero (inclusive). |
| __ Add(last_match_offsets, |
| last_match_info_elements, |
| RegExpImpl::kFirstCaptureOffset - kHeapObjectTag); |
| __ Bind(&next_capture); |
| __ Subs(number_of_capture_registers, number_of_capture_registers, 2); |
| __ B(mi, &done); |
| // Read two 32 bit values from the static offsets vector buffer into |
| // an X register |
| __ Ldr(current_offset, |
| MemOperand(offsets_vector_index, kWRegSize * 2, PostIndex)); |
| // Store the smi values in the last match info. |
| __ SmiTag(x10, current_offset); |
| // Clearing the 32 bottom bits gives us a Smi. |
| STATIC_ASSERT(kSmiTag == 0); |
| __ Bic(x11, current_offset, kSmiShiftMask); |
| __ Stp(x10, |
| x11, |
| MemOperand(last_match_offsets, kXRegSize * 2, PostIndex)); |
| __ B(&next_capture); |
| __ Bind(&done); |
| |
| // Return last match info. |
| __ Peek(x0, kLastMatchInfoOffset); |
| // Drop the 4 arguments of the stub from the stack. |
| __ Drop(4); |
| __ Ret(); |
| |
| __ Bind(&exception); |
| Register exception_value = x0; |
| // A stack overflow (on the backtrack stack) may have occured |
| // in the RegExp code but no exception has been created yet. |
| // If there is no pending exception, handle that in the runtime system. |
| __ Mov(x10, Operand(isolate()->factory()->the_hole_value())); |
| __ Mov(x11, |
| Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
| isolate()))); |
| __ Ldr(exception_value, MemOperand(x11)); |
| __ Cmp(x10, exception_value); |
| __ B(eq, &runtime); |
| |
| // For exception, throw the exception again. |
| __ TailCallRuntime(Runtime::kRegExpExecReThrow); |
| |
| __ Bind(&failure); |
| __ Mov(x0, Operand(isolate()->factory()->null_value())); |
| // Drop the 4 arguments of the stub from the stack. |
| __ Drop(4); |
| __ Ret(); |
| |
| __ Bind(&runtime); |
| __ TailCallRuntime(Runtime::kRegExpExec); |
| |
| // Deferred code for string handling. |
| // (5) Long external string? If not, go to (7). |
| __ Bind(¬_seq_nor_cons); |
| // Compare flags are still set. |
| __ B(ne, ¬_long_external); // Go to (7). |
| |
| // (6) External string. Make it, offset-wise, look like a sequential string. |
| __ Bind(&external_string); |
| if (masm->emit_debug_code()) { |
| // Assert that we do not have a cons or slice (indirect strings) here. |
| // Sequential strings have already been ruled out. |
| __ Ldr(x10, FieldMemOperand(subject, HeapObject::kMapOffset)); |
| __ Ldrb(x10, FieldMemOperand(x10, Map::kInstanceTypeOffset)); |
| __ Tst(x10, kIsIndirectStringMask); |
| __ Check(eq, kExternalStringExpectedButNotFound); |
| __ And(x10, x10, kStringRepresentationMask); |
| __ Cmp(x10, 0); |
| __ Check(ne, kExternalStringExpectedButNotFound); |
| } |
| __ Ldr(subject, |
| FieldMemOperand(subject, ExternalString::kResourceDataOffset)); |
| // Move the pointer so that offset-wise, it looks like a sequential string. |
| STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize); |
| __ Sub(subject, subject, SeqTwoByteString::kHeaderSize - kHeapObjectTag); |
| __ B(&seq_string); // Go to (4). |
| |
| // (7) If this is a short external string or not a string, bail out to |
| // runtime. |
| __ Bind(¬_long_external); |
| STATIC_ASSERT(kShortExternalStringTag != 0); |
| __ TestAndBranchIfAnySet(string_representation, |
| kShortExternalStringMask | kIsNotStringMask, |
| &runtime); |
| |
| // (8) Sliced string. Replace subject with parent. |
| __ Ldr(sliced_string_offset, |
| UntagSmiFieldMemOperand(subject, SlicedString::kOffsetOffset)); |
| __ Ldr(subject, FieldMemOperand(subject, SlicedString::kParentOffset)); |
| __ B(&check_underlying); // Go to (1). |
| #endif |
| } |
| |
| |
| static void CallStubInRecordCallTarget(MacroAssembler* masm, CodeStub* stub, |
| Register argc, Register function, |
| Register feedback_vector, Register index, |
| Register new_target) { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| |
| // Number-of-arguments register must be smi-tagged to call out. |
| __ SmiTag(argc); |
| __ Push(argc, function, feedback_vector, index); |
| |
| DCHECK(feedback_vector.Is(x2) && index.Is(x3)); |
| __ CallStub(stub); |
| |
| __ Pop(index, feedback_vector, function, argc); |
| __ SmiUntag(argc); |
| } |
| |
| |
| static void GenerateRecordCallTarget(MacroAssembler* masm, Register argc, |
| Register function, |
| Register feedback_vector, Register index, |
| Register new_target, Register scratch1, |
| Register scratch2, Register scratch3) { |
| ASM_LOCATION("GenerateRecordCallTarget"); |
| DCHECK(!AreAliased(scratch1, scratch2, scratch3, argc, function, |
| feedback_vector, index, new_target)); |
| // Cache the called function in a feedback vector slot. Cache states are |
| // uninitialized, monomorphic (indicated by a JSFunction), and megamorphic. |
| // argc : number of arguments to the construct function |
| // function : the function to call |
| // feedback_vector : the feedback vector |
| // index : slot in feedback vector (smi) |
| Label initialize, done, miss, megamorphic, not_array_function; |
| |
| DCHECK_EQ(*TypeFeedbackVector::MegamorphicSentinel(masm->isolate()), |
| masm->isolate()->heap()->megamorphic_symbol()); |
| DCHECK_EQ(*TypeFeedbackVector::UninitializedSentinel(masm->isolate()), |
| masm->isolate()->heap()->uninitialized_symbol()); |
| |
| // Load the cache state. |
| Register feedback = scratch1; |
| Register feedback_map = scratch2; |
| Register feedback_value = scratch3; |
| __ Add(feedback, feedback_vector, |
| Operand::UntagSmiAndScale(index, kPointerSizeLog2)); |
| __ Ldr(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| |
| // A monomorphic cache hit or an already megamorphic state: invoke the |
| // function without changing the state. |
| // We don't know if feedback value is a WeakCell or a Symbol, but it's |
| // harmless to read at this position in a symbol (see static asserts in |
| // type-feedback-vector.h). |
| Label check_allocation_site; |
| __ Ldr(feedback_value, FieldMemOperand(feedback, WeakCell::kValueOffset)); |
| __ Cmp(function, feedback_value); |
| __ B(eq, &done); |
| __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex); |
| __ B(eq, &done); |
| __ Ldr(feedback_map, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| __ CompareRoot(feedback_map, Heap::kWeakCellMapRootIndex); |
| __ B(ne, &check_allocation_site); |
| |
| // If the weak cell is cleared, we have a new chance to become monomorphic. |
| __ JumpIfSmi(feedback_value, &initialize); |
| __ B(&megamorphic); |
| |
| __ bind(&check_allocation_site); |
| // If we came here, we need to see if we are the array function. |
| // If we didn't have a matching function, and we didn't find the megamorph |
| // sentinel, then we have in the slot either some other function or an |
| // AllocationSite. |
| __ JumpIfNotRoot(feedback_map, Heap::kAllocationSiteMapRootIndex, &miss); |
| |
| // Make sure the function is the Array() function |
| __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, scratch1); |
| __ Cmp(function, scratch1); |
| __ B(ne, &megamorphic); |
| __ B(&done); |
| |
| __ Bind(&miss); |
| |
| // A monomorphic miss (i.e, here the cache is not uninitialized) goes |
| // megamorphic. |
| __ JumpIfRoot(scratch1, Heap::kuninitialized_symbolRootIndex, &initialize); |
| // MegamorphicSentinel is an immortal immovable object (undefined) so no |
| // write-barrier is needed. |
| __ Bind(&megamorphic); |
| __ Add(scratch1, feedback_vector, |
| Operand::UntagSmiAndScale(index, kPointerSizeLog2)); |
| __ LoadRoot(scratch2, Heap::kmegamorphic_symbolRootIndex); |
| __ Str(scratch2, FieldMemOperand(scratch1, FixedArray::kHeaderSize)); |
| __ B(&done); |
| |
| // An uninitialized cache is patched with the function or sentinel to |
| // indicate the ElementsKind if function is the Array constructor. |
| __ Bind(&initialize); |
| |
| // Make sure the function is the Array() function |
| __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, scratch1); |
| __ Cmp(function, scratch1); |
| __ B(ne, ¬_array_function); |
| |
| // The target function is the Array constructor, |
| // Create an AllocationSite if we don't already have it, store it in the |
| // slot. |
| CreateAllocationSiteStub create_stub(masm->isolate()); |
| CallStubInRecordCallTarget(masm, &create_stub, argc, function, |
| feedback_vector, index, new_target); |
| __ B(&done); |
| |
| __ Bind(¬_array_function); |
| CreateWeakCellStub weak_cell_stub(masm->isolate()); |
| CallStubInRecordCallTarget(masm, &weak_cell_stub, argc, function, |
| feedback_vector, index, new_target); |
| __ Bind(&done); |
| } |
| |
| |
| void CallConstructStub::Generate(MacroAssembler* masm) { |
| ASM_LOCATION("CallConstructStub::Generate"); |
| // x0 : number of arguments |
| // x1 : the function to call |
| // x2 : feedback vector |
| // x3 : slot in feedback vector (Smi, for RecordCallTarget) |
| Register function = x1; |
| |
| Label non_function; |
| // Check that the function is not a smi. |
| __ JumpIfSmi(function, &non_function); |
| // Check that the function is a JSFunction. |
| Register object_type = x10; |
| __ JumpIfNotObjectType(function, object_type, object_type, JS_FUNCTION_TYPE, |
| &non_function); |
| |
| GenerateRecordCallTarget(masm, x0, function, x2, x3, x4, x5, x11, x12); |
| |
| __ Add(x5, x2, Operand::UntagSmiAndScale(x3, kPointerSizeLog2)); |
| Label feedback_register_initialized; |
| // Put the AllocationSite from the feedback vector into x2, or undefined. |
| __ Ldr(x2, FieldMemOperand(x5, FixedArray::kHeaderSize)); |
| __ Ldr(x5, FieldMemOperand(x2, AllocationSite::kMapOffset)); |
| __ JumpIfRoot(x5, Heap::kAllocationSiteMapRootIndex, |
| &feedback_register_initialized); |
| __ LoadRoot(x2, Heap::kUndefinedValueRootIndex); |
| __ bind(&feedback_register_initialized); |
| |
| __ AssertUndefinedOrAllocationSite(x2, x5); |
| |
| __ Mov(x3, function); |
| |
| // Tail call to the function-specific construct stub (still in the caller |
| // context at this point). |
| __ Ldr(x4, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(x4, FieldMemOperand(x4, SharedFunctionInfo::kConstructStubOffset)); |
| __ Add(x4, x4, Code::kHeaderSize - kHeapObjectTag); |
| __ Br(x4); |
| |
| __ Bind(&non_function); |
| __ Mov(x3, function); |
| __ Jump(isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET); |
| } |
| |
| |
| void CallICStub::HandleArrayCase(MacroAssembler* masm, Label* miss) { |
| // x1 - function |
| // x3 - slot id |
| // x2 - vector |
| // x4 - allocation site (loaded from vector[slot]) |
| Register function = x1; |
| Register feedback_vector = x2; |
| Register index = x3; |
| Register allocation_site = x4; |
| Register scratch = x5; |
| |
| __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, scratch); |
| __ Cmp(function, scratch); |
| __ B(ne, miss); |
| |
| __ Mov(x0, Operand(arg_count())); |
| |
| // Increment the call count for monomorphic function calls. |
| __ Add(feedback_vector, feedback_vector, |
| Operand::UntagSmiAndScale(index, kPointerSizeLog2)); |
| __ Add(feedback_vector, feedback_vector, |
| Operand(FixedArray::kHeaderSize + kPointerSize)); |
| __ Ldr(index, FieldMemOperand(feedback_vector, 0)); |
| __ Add(index, index, Operand(Smi::FromInt(CallICNexus::kCallCountIncrement))); |
| __ Str(index, FieldMemOperand(feedback_vector, 0)); |
| |
| // Set up arguments for the array constructor stub. |
| Register allocation_site_arg = feedback_vector; |
| Register new_target_arg = index; |
| __ Mov(allocation_site_arg, allocation_site); |
| __ Mov(new_target_arg, function); |
| ArrayConstructorStub stub(masm->isolate(), arg_count()); |
| __ TailCallStub(&stub); |
| } |
| |
| |
| void CallICStub::Generate(MacroAssembler* masm) { |
| ASM_LOCATION("CallICStub"); |
| |
| // x1 - function |
| // x3 - slot id (Smi) |
| // x2 - vector |
| Label extra_checks_or_miss, call, call_function; |
| int argc = arg_count(); |
| ParameterCount actual(argc); |
| |
| Register function = x1; |
| Register feedback_vector = x2; |
| Register index = x3; |
| |
| // The checks. First, does x1 match the recorded monomorphic target? |
| __ Add(x4, feedback_vector, |
| Operand::UntagSmiAndScale(index, kPointerSizeLog2)); |
| __ Ldr(x4, FieldMemOperand(x4, FixedArray::kHeaderSize)); |
| |
| // We don't know that we have a weak cell. We might have a private symbol |
| // or an AllocationSite, but the memory is safe to examine. |
| // AllocationSite::kTransitionInfoOffset - contains a Smi or pointer to |
| // FixedArray. |
| // WeakCell::kValueOffset - contains a JSFunction or Smi(0) |
| // Symbol::kHashFieldSlot - if the low bit is 1, then the hash is not |
| // computed, meaning that it can't appear to be a pointer. If the low bit is |
| // 0, then hash is computed, but the 0 bit prevents the field from appearing |
| // to be a pointer. |
| STATIC_ASSERT(WeakCell::kSize >= kPointerSize); |
| STATIC_ASSERT(AllocationSite::kTransitionInfoOffset == |
| WeakCell::kValueOffset && |
| WeakCell::kValueOffset == Symbol::kHashFieldSlot); |
| |
| __ Ldr(x5, FieldMemOperand(x4, WeakCell::kValueOffset)); |
| __ Cmp(x5, function); |
| __ B(ne, &extra_checks_or_miss); |
| |
| // The compare above could have been a SMI/SMI comparison. Guard against this |
| // convincing us that we have a monomorphic JSFunction. |
| __ JumpIfSmi(function, &extra_checks_or_miss); |
| |
| // Increment the call count for monomorphic function calls. |
| __ Add(feedback_vector, feedback_vector, |
| Operand::UntagSmiAndScale(index, kPointerSizeLog2)); |
| __ Add(feedback_vector, feedback_vector, |
| Operand(FixedArray::kHeaderSize + kPointerSize)); |
| __ Ldr(index, FieldMemOperand(feedback_vector, 0)); |
| __ Add(index, index, Operand(Smi::FromInt(CallICNexus::kCallCountIncrement))); |
| __ Str(index, FieldMemOperand(feedback_vector, 0)); |
| |
| __ Bind(&call_function); |
| __ Mov(x0, argc); |
| __ Jump(masm->isolate()->builtins()->CallFunction(convert_mode(), |
| tail_call_mode()), |
| RelocInfo::CODE_TARGET); |
| |
| __ bind(&extra_checks_or_miss); |
| Label uninitialized, miss, not_allocation_site; |
| |
| __ JumpIfRoot(x4, Heap::kmegamorphic_symbolRootIndex, &call); |
| |
| __ Ldr(x5, FieldMemOperand(x4, HeapObject::kMapOffset)); |
| __ JumpIfNotRoot(x5, Heap::kAllocationSiteMapRootIndex, ¬_allocation_site); |
| |
| HandleArrayCase(masm, &miss); |
| |
| __ bind(¬_allocation_site); |
| |
| // The following cases attempt to handle MISS cases without going to the |
| // runtime. |
| if (FLAG_trace_ic) { |
| __ jmp(&miss); |
| } |
| |
| __ JumpIfRoot(x4, Heap::kuninitialized_symbolRootIndex, &miss); |
| |
| // We are going megamorphic. If the feedback is a JSFunction, it is fine |
| // to handle it here. More complex cases are dealt with in the runtime. |
| __ AssertNotSmi(x4); |
| __ JumpIfNotObjectType(x4, x5, x5, JS_FUNCTION_TYPE, &miss); |
| __ Add(x4, feedback_vector, |
| Operand::UntagSmiAndScale(index, kPointerSizeLog2)); |
| __ LoadRoot(x5, Heap::kmegamorphic_symbolRootIndex); |
| __ Str(x5, FieldMemOperand(x4, FixedArray::kHeaderSize)); |
| |
| __ Bind(&call); |
| __ Mov(x0, argc); |
| __ Jump(masm->isolate()->builtins()->Call(convert_mode(), tail_call_mode()), |
| RelocInfo::CODE_TARGET); |
| |
| __ bind(&uninitialized); |
| |
| // We are going monomorphic, provided we actually have a JSFunction. |
| __ JumpIfSmi(function, &miss); |
| |
| // Goto miss case if we do not have a function. |
| __ JumpIfNotObjectType(function, x5, x5, JS_FUNCTION_TYPE, &miss); |
| |
| // Make sure the function is not the Array() function, which requires special |
| // behavior on MISS. |
| __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, x5); |
| __ Cmp(function, x5); |
| __ B(eq, &miss); |
| |
| // Make sure the function belongs to the same native context. |
| __ Ldr(x4, FieldMemOperand(function, JSFunction::kContextOffset)); |
| __ Ldr(x4, ContextMemOperand(x4, Context::NATIVE_CONTEXT_INDEX)); |
| __ Ldr(x5, NativeContextMemOperand()); |
| __ Cmp(x4, x5); |
| __ B(ne, &miss); |
| |
| // Initialize the call counter. |
| __ Mov(x5, Smi::FromInt(CallICNexus::kCallCountIncrement)); |
| __ Adds(x4, feedback_vector, |
| Operand::UntagSmiAndScale(index, kPointerSizeLog2)); |
| __ Str(x5, FieldMemOperand(x4, FixedArray::kHeaderSize + kPointerSize)); |
| |
| // Store the function. Use a stub since we need a frame for allocation. |
| // x2 - vector |
| // x3 - slot |
| // x1 - function |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| CreateWeakCellStub create_stub(masm->isolate()); |
| __ Push(function); |
| __ CallStub(&create_stub); |
| __ Pop(function); |
| } |
| |
| __ B(&call_function); |
| |
| // We are here because tracing is on or we encountered a MISS case we can't |
| // handle here. |
| __ bind(&miss); |
| GenerateMiss(masm); |
| |
| __ B(&call); |
| } |
| |
| |
| void CallICStub::GenerateMiss(MacroAssembler* masm) { |
| ASM_LOCATION("CallICStub[Miss]"); |
| |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| |
| // Push the receiver and the function and feedback info. |
| __ Push(x1, x2, x3); |
| |
| // Call the entry. |
| __ CallRuntime(Runtime::kCallIC_Miss); |
| |
| // Move result to edi and exit the internal frame. |
| __ Mov(x1, x0); |
| } |
| |
| |
| void StringCharCodeAtGenerator::GenerateFast(MacroAssembler* masm) { |
| // If the receiver is a smi trigger the non-string case. |
| if (check_mode_ == RECEIVER_IS_UNKNOWN) { |
| __ JumpIfSmi(object_, receiver_not_string_); |
| |
| // Fetch the instance type of the receiver into result register. |
| __ Ldr(result_, FieldMemOperand(object_, HeapObject::kMapOffset)); |
| __ Ldrb(result_, FieldMemOperand(result_, Map::kInstanceTypeOffset)); |
| |
| // If the receiver is not a string trigger the non-string case. |
| __ TestAndBranchIfAnySet(result_, kIsNotStringMask, receiver_not_string_); |
| } |
| |
| // If the index is non-smi trigger the non-smi case. |
| __ JumpIfNotSmi(index_, &index_not_smi_); |
| |
| __ Bind(&got_smi_index_); |
| // Check for index out of range. |
| __ Ldrsw(result_, UntagSmiFieldMemOperand(object_, String::kLengthOffset)); |
| __ Cmp(result_, Operand::UntagSmi(index_)); |
| __ B(ls, index_out_of_range_); |
| |
| __ SmiUntag(index_); |
| |
| StringCharLoadGenerator::Generate(masm, |
| object_, |
| index_.W(), |
| result_, |
| &call_runtime_); |
| __ SmiTag(result_); |
| __ Bind(&exit_); |
| } |
| |
| |
| void StringCharCodeAtGenerator::GenerateSlow( |
| MacroAssembler* masm, EmbedMode embed_mode, |
| const RuntimeCallHelper& call_helper) { |
| __ Abort(kUnexpectedFallthroughToCharCodeAtSlowCase); |
| |
| __ Bind(&index_not_smi_); |
| // If index is a heap number, try converting it to an integer. |
| __ JumpIfNotHeapNumber(index_, index_not_number_); |
| call_helper.BeforeCall(masm); |
| if (embed_mode == PART_OF_IC_HANDLER) { |
| __ Push(LoadWithVectorDescriptor::VectorRegister(), |
| LoadWithVectorDescriptor::SlotRegister(), object_, index_); |
| } else { |
| // Save object_ on the stack and pass index_ as argument for runtime call. |
| __ Push(object_, index_); |
| } |
| if (index_flags_ == STRING_INDEX_IS_NUMBER) { |
| __ CallRuntime(Runtime::kNumberToIntegerMapMinusZero); |
| } else { |
| DCHECK(index_flags_ == STRING_INDEX_IS_ARRAY_INDEX); |
| // NumberToSmi discards numbers that are not exact integers. |
| __ CallRuntime(Runtime::kNumberToSmi); |
| } |
| // Save the conversion result before the pop instructions below |
| // have a chance to overwrite it. |
| __ Mov(index_, x0); |
| if (embed_mode == PART_OF_IC_HANDLER) { |
| __ Pop(object_, LoadWithVectorDescriptor::SlotRegister(), |
| LoadWithVectorDescriptor::VectorRegister()); |
| } else { |
| __ Pop(object_); |
| } |
| // Reload the instance type. |
| __ Ldr(result_, FieldMemOperand(object_, HeapObject::kMapOffset)); |
| __ Ldrb(result_, FieldMemOperand(result_, Map::kInstanceTypeOffset)); |
| call_helper.AfterCall(masm); |
| |
| // If index is still not a smi, it must be out of range. |
| __ JumpIfNotSmi(index_, index_out_of_range_); |
| // Otherwise, return to the fast path. |
| __ B(&got_smi_index_); |
| |
| // Call runtime. We get here when the receiver is a string and the |
| // index is a number, but the code of getting the actual character |
| // is too complex (e.g., when the string needs to be flattened). |
| __ Bind(&call_runtime_); |
| call_helper.BeforeCall(masm); |
| __ SmiTag(index_); |
| __ Push(object_, index_); |
| __ CallRuntime(Runtime::kStringCharCodeAtRT); |
| __ Mov(result_, x0); |
| call_helper.AfterCall(masm); |
| __ B(&exit_); |
| |
| __ Abort(kUnexpectedFallthroughFromCharCodeAtSlowCase); |
| } |
| |
| |
| void StringCharFromCodeGenerator::GenerateFast(MacroAssembler* masm) { |
| __ JumpIfNotSmi(code_, &slow_case_); |
| __ Cmp(code_, Smi::FromInt(String::kMaxOneByteCharCode)); |
| __ B(hi, &slow_case_); |
| |
| __ LoadRoot(result_, Heap::kSingleCharacterStringCacheRootIndex); |
| // At this point code register contains smi tagged one-byte char code. |
| __ Add(result_, result_, Operand::UntagSmiAndScale(code_, kPointerSizeLog2)); |
| __ Ldr(result_, FieldMemOperand(result_, FixedArray::kHeaderSize)); |
| __ JumpIfRoot(result_, Heap::kUndefinedValueRootIndex, &slow_case_); |
| __ Bind(&exit_); |
| } |
| |
| |
| void StringCharFromCodeGenerator::GenerateSlow( |
| MacroAssembler* masm, |
| const RuntimeCallHelper& call_helper) { |
| __ Abort(kUnexpectedFallthroughToCharFromCodeSlowCase); |
| |
| __ Bind(&slow_case_); |
| call_helper.BeforeCall(masm); |
| __ Push(code_); |
| __ CallRuntime(Runtime::kStringCharFromCode); |
| __ Mov(result_, x0); |
| call_helper.AfterCall(masm); |
| __ B(&exit_); |
| |
| __ Abort(kUnexpectedFallthroughFromCharFromCodeSlowCase); |
| } |
| |
| |
| void CompareICStub::GenerateBooleans(MacroAssembler* masm) { |
| // Inputs are in x0 (lhs) and x1 (rhs). |
| DCHECK_EQ(CompareICState::BOOLEAN, state()); |
| ASM_LOCATION("CompareICStub[Booleans]"); |
| Label miss; |
| |
| __ CheckMap(x1, x2, Heap::kBooleanMapRootIndex, &miss, DO_SMI_CHECK); |
| __ CheckMap(x0, x3, Heap::kBooleanMapRootIndex, &miss, DO_SMI_CHECK); |
| if (!Token::IsEqualityOp(op())) { |
| __ Ldr(x1, FieldMemOperand(x1, Oddball::kToNumberOffset)); |
| __ AssertSmi(x1); |
| __ Ldr(x0, FieldMemOperand(x0, Oddball::kToNumberOffset)); |
| __ AssertSmi(x0); |
| } |
| __ Sub(x0, x1, x0); |
| __ Ret(); |
| |
| __ Bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| |
| void CompareICStub::GenerateSmis(MacroAssembler* masm) { |
| // Inputs are in x0 (lhs) and x1 (rhs). |
| DCHECK(state() == CompareICState::SMI); |
| ASM_LOCATION("CompareICStub[Smis]"); |
| Label miss; |
| // Bail out (to 'miss') unless both x0 and x1 are smis. |
| __ JumpIfEitherNotSmi(x0, x1, &miss); |
| |
| if (GetCondition() == eq) { |
| // For equality we do not care about the sign of the result. |
| __ Sub(x0, x0, x1); |
| } else { |
| // Untag before subtracting to avoid handling overflow. |
| __ SmiUntag(x1); |
| __ Sub(x0, x1, Operand::UntagSmi(x0)); |
| } |
| __ Ret(); |
| |
| __ Bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| |
| void CompareICStub::GenerateNumbers(MacroAssembler* masm) { |
| DCHECK(state() == CompareICState::NUMBER); |
| ASM_LOCATION("CompareICStub[HeapNumbers]"); |
| |
| Label unordered, maybe_undefined1, maybe_undefined2; |
| Label miss, handle_lhs, values_in_d_regs; |
| Label untag_rhs, untag_lhs; |
| |
| Register result = x0; |
| Register rhs = x0; |
| Register lhs = x1; |
| FPRegister rhs_d = d0; |
| FPRegister lhs_d = d1; |
| |
| if (left() == CompareICState::SMI) { |
| __ JumpIfNotSmi(lhs, &miss); |
| } |
| if (right() == CompareICState::SMI) { |
| __ JumpIfNotSmi(rhs, &miss); |
| } |
| |
| __ SmiUntagToDouble(rhs_d, rhs, kSpeculativeUntag); |
| __ SmiUntagToDouble(lhs_d, lhs, kSpeculativeUntag); |
| |
| // Load rhs if it's a heap number. |
| __ JumpIfSmi(rhs, &handle_lhs); |
| __ JumpIfNotHeapNumber(rhs, &maybe_undefined1); |
| __ Ldr(rhs_d, FieldMemOperand(rhs, HeapNumber::kValueOffset)); |
| |
| // Load lhs if it's a heap number. |
| __ Bind(&handle_lhs); |
| __ JumpIfSmi(lhs, &values_in_d_regs); |
| __ JumpIfNotHeapNumber(lhs, &maybe_undefined2); |
| __ Ldr(lhs_d, FieldMemOperand(lhs, HeapNumber::kValueOffset)); |
| |
| __ Bind(&values_in_d_regs); |
| __ Fcmp(lhs_d, rhs_d); |
| __ B(vs, &unordered); // Overflow flag set if either is NaN. |
| STATIC_ASSERT((LESS == -1) && (EQUAL == 0) && (GREATER == 1)); |
| __ Cset(result, gt); // gt => 1, otherwise (lt, eq) => 0 (EQUAL). |
| __ Csinv(result, result, xzr, ge); // lt => -1, gt => 1, eq => 0. |
| __ Ret(); |
| |
| __ Bind(&unordered); |
| CompareICStub stub(isolate(), op(), CompareICState::GENERIC, |
| CompareICState::GENERIC, CompareICState::GENERIC); |
| __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET); |
| |
| __ Bind(&maybe_undefined1); |
| if (Token::IsOrderedRelationalCompareOp(op())) { |
| __ JumpIfNotRoot(rhs, Heap::kUndefinedValueRootIndex, &miss); |
| __ JumpIfSmi(lhs, &unordered); |
| __ JumpIfNotHeapNumber(lhs, &maybe_undefined2); |
| __ B(&unordered); |
| } |
| |
| __ Bind(&maybe_undefined2); |
| if (Token::IsOrderedRelationalCompareOp(op())) { |
| __ JumpIfRoot(lhs, Heap::kUndefinedValueRootIndex, &unordered); |
| } |
| |
| __ Bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| |
| void CompareICStub::GenerateInternalizedStrings(MacroAssembler* masm) { |
| DCHECK(state() == CompareICState::INTERNALIZED_STRING); |
| ASM_LOCATION("CompareICStub[InternalizedStrings]"); |
| Label miss; |
| |
| Register result = x0; |
| Register rhs = x0; |
| Register lhs = x1; |
| |
| // Check that both operands are heap objects. |
| __ JumpIfEitherSmi(lhs, rhs, &miss); |
| |
| // Check that both operands are internalized strings. |
| Register rhs_map = x10; |
| Register lhs_map = x11; |
| Register rhs_type = x10; |
| Register lhs_type = x11; |
| __ Ldr(lhs_map, FieldMemOperand(lhs, HeapObject::kMapOffset)); |
| __ Ldr(rhs_map, FieldMemOperand(rhs, HeapObject::kMapOffset)); |
| __ Ldrb(lhs_type, FieldMemOperand(lhs_map, Map::kInstanceTypeOffset)); |
| __ Ldrb(rhs_type, FieldMemOperand(rhs_map, Map::kInstanceTypeOffset)); |
| |
| STATIC_ASSERT((kInternalizedTag == 0) && (kStringTag == 0)); |
| __ Orr(x12, lhs_type, rhs_type); |
| __ TestAndBranchIfAnySet( |
| x12, kIsNotStringMask | kIsNotInternalizedMask, &miss); |
| |
| // Internalized strings are compared by identity. |
| STATIC_ASSERT(EQUAL == 0); |
| __ Cmp(lhs, rhs); |
| __ Cset(result, ne); |
| __ Ret(); |
| |
| __ Bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| |
| void CompareICStub::GenerateUniqueNames(MacroAssembler* masm) { |
| DCHECK(state() == CompareICState::UNIQUE_NAME); |
| ASM_LOCATION("CompareICStub[UniqueNames]"); |
| DCHECK(GetCondition() == eq); |
| Label miss; |
| |
| Register result = x0; |
| Register rhs = x0; |
| Register lhs = x1; |
| |
| Register lhs_instance_type = w2; |
| Register rhs_instance_type = w3; |
| |
| // Check that both operands are heap objects. |
| __ JumpIfEitherSmi(lhs, rhs, &miss); |
| |
| // Check that both operands are unique names. This leaves the instance |
| // types loaded in tmp1 and tmp2. |
| __ Ldr(x10, FieldMemOperand(lhs, HeapObject::kMapOffset)); |
| __ Ldr(x11, FieldMemOperand(rhs, HeapObject::kMapOffset)); |
| __ Ldrb(lhs_instance_type, FieldMemOperand(x10, Map::kInstanceTypeOffset)); |
| __ Ldrb(rhs_instance_type, FieldMemOperand(x11, Map::kInstanceTypeOffset)); |
| |
| // To avoid a miss, each instance type should be either SYMBOL_TYPE or it |
| // should have kInternalizedTag set. |
| __ JumpIfNotUniqueNameInstanceType(lhs_instance_type, &miss); |
| __ JumpIfNotUniqueNameInstanceType(rhs_instance_type, &miss); |
| |
| // Unique names are compared by identity. |
| STATIC_ASSERT(EQUAL == 0); |
| __ Cmp(lhs, rhs); |
| __ Cset(result, ne); |
| __ Ret(); |
| |
| __ Bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| |
| void CompareICStub::GenerateStrings(MacroAssembler* masm) { |
| DCHECK(state() == CompareICState::STRING); |
| ASM_LOCATION("CompareICStub[Strings]"); |
| |
| Label miss; |
| |
| bool equality = Token::IsEqualityOp(op()); |
| |
| Register result = x0; |
| Register rhs = x0; |
| Register lhs = x1; |
| |
| // Check that both operands are heap objects. |
| __ JumpIfEitherSmi(rhs, lhs, &miss); |
| |
| // Check that both operands are strings. |
| Register rhs_map = x10; |
| Register lhs_map = x11; |
| Register rhs_type = x10; |
| Register lhs_type = x11; |
| __ Ldr(lhs_map, FieldMemOperand(lhs, HeapObject::kMapOffset)); |
| __ Ldr(rhs_map, FieldMemOperand(rhs, HeapObject::kMapOffset)); |
| __ Ldrb(lhs_type, FieldMemOperand(lhs_map, Map::kInstanceTypeOffset)); |
| __ Ldrb(rhs_type, FieldMemOperand(rhs_map, Map::kInstanceTypeOffset)); |
| STATIC_ASSERT(kNotStringTag != 0); |
| __ Orr(x12, lhs_type, rhs_type); |
| __ Tbnz(x12, MaskToBit(kIsNotStringMask), &miss); |
| |
| // Fast check for identical strings. |
| Label not_equal; |
| __ Cmp(lhs, rhs); |
| __ B(ne, ¬_equal); |
| __ Mov(result, EQUAL); |
| __ Ret(); |
| |
| __ Bind(¬_equal); |
| // Handle not identical strings |
| |
| // Check that both strings are internalized strings. If they are, we're done |
| // because we already know they are not identical. We know they are both |
| // strings. |
| if (equality) { |
| DCHECK(GetCondition() == eq); |
| STATIC_ASSERT(kInternalizedTag == 0); |
| Label not_internalized_strings; |
| __ Orr(x12, lhs_type, rhs_type); |
| __ TestAndBranchIfAnySet( |
| x12, kIsNotInternalizedMask, ¬_internalized_strings); |
| // Result is in rhs (x0), and not EQUAL, as rhs is not a smi. |
| __ Ret(); |
| __ Bind(¬_internalized_strings); |
| } |
| |
| // Check that both strings are sequential one-byte. |
| Label runtime; |
| __ JumpIfBothInstanceTypesAreNotSequentialOneByte(lhs_type, rhs_type, x12, |
| x13, &runtime); |
| |
| // Compare flat one-byte strings. Returns when done. |
| if (equality) { |
| StringHelper::GenerateFlatOneByteStringEquals(masm, lhs, rhs, x10, x11, |
| x12); |
| } else { |
| StringHelper::GenerateCompareFlatOneByteStrings(masm, lhs, rhs, x10, x11, |
| x12, x13); |
| } |
| |
| // Handle more complex cases in runtime. |
| __ Bind(&runtime); |
| __ Push(lhs, rhs); |
| if (equality) { |
| __ TailCallRuntime(Runtime::kStringEquals); |
| } else { |
| __ TailCallRuntime(Runtime::kStringCompare); |
| } |
| |
| __ Bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| |
| void CompareICStub::GenerateReceivers(MacroAssembler* masm) { |
| DCHECK_EQ(CompareICState::RECEIVER, state()); |
| ASM_LOCATION("CompareICStub[Receivers]"); |
| |
| Label miss; |
| |
| Register result = x0; |
| Register rhs = x0; |
| Register lhs = x1; |
| |
| __ JumpIfEitherSmi(rhs, lhs, &miss); |
| |
| STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE); |
| __ JumpIfObjectType(rhs, x10, x10, FIRST_JS_RECEIVER_TYPE, &miss, lt); |
| __ JumpIfObjectType(lhs, x10, x10, FIRST_JS_RECEIVER_TYPE, &miss, lt); |
| |
| DCHECK_EQ(eq, GetCondition()); |
| __ Sub(result, rhs, lhs); |
| __ Ret(); |
| |
| __ Bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| |
| void CompareICStub::GenerateKnownReceivers(MacroAssembler* masm) { |
| ASM_LOCATION("CompareICStub[KnownReceivers]"); |
| |
| Label miss; |
| Handle<WeakCell> cell = Map::WeakCellForMap(known_map_); |
| |
| Register result = x0; |
| Register rhs = x0; |
| Register lhs = x1; |
| |
| __ JumpIfEitherSmi(rhs, lhs, &miss); |
| |
| Register rhs_map = x10; |
| Register lhs_map = x11; |
| Register map = x12; |
| __ GetWeakValue(map, cell); |
| __ Ldr(rhs_map, FieldMemOperand(rhs, HeapObject::kMapOffset)); |
| __ Ldr(lhs_map, FieldMemOperand(lhs, HeapObject::kMapOffset)); |
| __ Cmp(rhs_map, map); |
| __ B(ne, &miss); |
| __ Cmp(lhs_map, map); |
| __ B(ne, &miss); |
| |
| if (Token::IsEqualityOp(op())) { |
| __ Sub(result, rhs, lhs); |
| __ Ret(); |
| } else { |
| Register ncr = x2; |
| if (op() == Token::LT || op() == Token::LTE) { |
| __ Mov(ncr, Smi::FromInt(GREATER)); |
| } else { |
| __ Mov(ncr, Smi::FromInt(LESS)); |
| } |
| __ Push(lhs, rhs, ncr); |
| __ TailCallRuntime(Runtime::kCompare); |
| } |
| |
| __ Bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| |
| // This method handles the case where a compare stub had the wrong |
| // implementation. It calls a miss handler, which re-writes the stub. All other |
| // CompareICStub::Generate* methods should fall back into this one if their |
| // operands were not the expected types. |
| void CompareICStub::GenerateMiss(MacroAssembler* masm) { |
| ASM_LOCATION("CompareICStub[Miss]"); |
| |
| Register stub_entry = x11; |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| Register op = x10; |
| Register left = x1; |
| Register right = x0; |
| // Preserve some caller-saved registers. |
| __ Push(x1, x0, lr); |
| // Push the arguments. |
| __ Mov(op, Smi::FromInt(this->op())); |
| __ Push(left, right, op); |
| |
| // Call the miss handler. This also pops the arguments. |
| __ CallRuntime(Runtime::kCompareIC_Miss); |
| |
| // Compute the entry point of the rewritten stub. |
| __ Add(stub_entry, x0, Code::kHeaderSize - kHeapObjectTag); |
| // Restore caller-saved registers. |
| __ Pop(lr, x0, x1); |
| } |
| |
| // Tail-call to the new stub. |
| __ Jump(stub_entry); |
| } |
| |
| |
| void SubStringStub::Generate(MacroAssembler* masm) { |
| ASM_LOCATION("SubStringStub::Generate"); |
| Label runtime; |
| |
| // Stack frame on entry. |
| // lr: return address |
| // jssp[0]: substring "to" offset |
| // jssp[8]: substring "from" offset |
| // jssp[16]: pointer to string object |
| |
| // This stub is called from the native-call %_SubString(...), so |
| // nothing can be assumed about the arguments. It is tested that: |
| // "string" is a sequential string, |
| // both "from" and "to" are smis, and |
| // 0 <= from <= to <= string.length (in debug mode.) |
| // If any of these assumptions fail, we call the runtime system. |
| |
| static const int kToOffset = 0 * kPointerSize; |
| static const int kFromOffset = 1 * kPointerSize; |
| static const int kStringOffset = 2 * kPointerSize; |
| |
| Register to = x0; |
| Register from = x15; |
| Register input_string = x10; |
| Register input_length = x11; |
| Register input_type = x12; |
| Register result_string = x0; |
| Register result_length = x1; |
| Register temp = x3; |
| |
| __ Peek(to, kToOffset); |
| __ Peek(from, kFromOffset); |
| |
| // Check that both from and to are smis. If not, jump to runtime. |
| __ JumpIfEitherNotSmi(from, to, &runtime); |
| __ SmiUntag(from); |
| __ SmiUntag(to); |
| |
| // Calculate difference between from and to. If to < from, branch to runtime. |
| __ Subs(result_length, to, from); |
| __ B(mi, &runtime); |
| |
| // Check from is positive. |
| __ Tbnz(from, kWSignBit, &runtime); |
| |
| // Make sure first argument is a string. |
| __ Peek(input_string, kStringOffset); |
| __ JumpIfSmi(input_string, &runtime); |
| __ IsObjectJSStringType(input_string, input_type, &runtime); |
| |
| Label single_char; |
| __ Cmp(result_length, 1); |
| __ B(eq, &single_char); |
| |
| // Short-cut for the case of trivial substring. |
| Label return_x0; |
| __ Ldrsw(input_length, |
| UntagSmiFieldMemOperand(input_string, String::kLengthOffset)); |
| |
| __ Cmp(result_length, input_length); |
| __ CmovX(x0, input_string, eq); |
| // Return original string. |
| __ B(eq, &return_x0); |
| |
| // Longer than original string's length or negative: unsafe arguments. |
| __ B(hi, &runtime); |
| |
| // Shorter than original string's length: an actual substring. |
| |
| // x0 to substring end character offset |
| // x1 result_length length of substring result |
| // x10 input_string pointer to input string object |
| // x10 unpacked_string pointer to unpacked string object |
| // x11 input_length length of input string |
| // x12 input_type instance type of input string |
| // x15 from substring start character offset |
| |
| // Deal with different string types: update the index if necessary and put |
| // the underlying string into register unpacked_string. |
| Label underlying_unpacked, sliced_string, seq_or_external_string; |
| Label update_instance_type; |
| // If the string is not indirect, it can only be sequential or external. |
| STATIC_ASSERT(kIsIndirectStringMask == (kSlicedStringTag & kConsStringTag)); |
| STATIC_ASSERT(kIsIndirectStringMask != 0); |
| |
| // Test for string types, and branch/fall through to appropriate unpacking |
| // code. |
| __ Tst(input_type, kIsIndirectStringMask); |
| __ B(eq, &seq_or_external_string); |
| __ Tst(input_type, kSlicedNotConsMask); |
| __ B(ne, &sliced_string); |
| |
| Register unpacked_string = input_string; |
| |
| // Cons string. Check whether it is flat, then fetch first part. |
| __ Ldr(temp, FieldMemOperand(input_string, ConsString::kSecondOffset)); |
| __ JumpIfNotRoot(temp, Heap::kempty_stringRootIndex, &runtime); |
| __ Ldr(unpacked_string, |
| FieldMemOperand(input_string, ConsString::kFirstOffset)); |
| __ B(&update_instance_type); |
| |
| __ Bind(&sliced_string); |
| // Sliced string. Fetch parent and correct start index by offset. |
| __ Ldrsw(temp, |
| UntagSmiFieldMemOperand(input_string, SlicedString::kOffsetOffset)); |
| __ Add(from, from, temp); |
| __ Ldr(unpacked_string, |
| FieldMemOperand(input_string, SlicedString::kParentOffset)); |
| |
| __ Bind(&update_instance_type); |
| __ Ldr(temp, FieldMemOperand(unpacked_string, HeapObject::kMapOffset)); |
| __ Ldrb(input_type, FieldMemOperand(temp, Map::kInstanceTypeOffset)); |
| // Now control must go to &underlying_unpacked. Since the no code is generated |
| // before then we fall through instead of generating a useless branch. |
| |
| __ Bind(&seq_or_external_string); |
| // Sequential or external string. Registers unpacked_string and input_string |
| // alias, so there's nothing to do here. |
| // Note that if code is added here, the above code must be updated. |
| |
| // x0 result_string pointer to result string object (uninit) |
| // x1 result_length length of substring result |
| // x10 unpacked_string pointer to unpacked string object |
| // x11 input_length length of input string |
| // x12 input_type instance type of input string |
| // x15 from substring start character offset |
| __ Bind(&underlying_unpacked); |
| |
| if (FLAG_string_slices) { |
| Label copy_routine; |
| __ Cmp(result_length, SlicedString::kMinLength); |
| // Short slice. Copy instead of slicing. |
| __ B(lt, ©_routine); |
| // Allocate new sliced string. At this point we do not reload the instance |
| // type including the string encoding because we simply rely on the info |
| // provided by the original string. It does not matter if the original |
| // string's encoding is wrong because we always have to recheck encoding of |
| // the newly created string's parent anyway due to externalized strings. |
| Label two_byte_slice, set_slice_header; |
| STATIC_ASSERT((kStringEncodingMask & kOneByteStringTag) != 0); |
| STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0); |
| __ Tbz(input_type, MaskToBit(kStringEncodingMask), &two_byte_slice); |
| __ AllocateOneByteSlicedString(result_string, result_length, x3, x4, |
| &runtime); |
| __ B(&set_slice_header); |
| |
| __ Bind(&two_byte_slice); |
| __ AllocateTwoByteSlicedString(result_string, result_length, x3, x4, |
| &runtime); |
| |
| __ Bind(&set_slice_header); |
| __ SmiTag(from); |
| __ Str(from, FieldMemOperand(result_string, SlicedString::kOffsetOffset)); |
| __ Str(unpacked_string, |
| FieldMemOperand(result_string, SlicedString::kParentOffset)); |
| __ B(&return_x0); |
| |
| __ Bind(©_routine); |
| } |
| |
| // x0 result_string pointer to result string object (uninit) |
| // x1 result_length length of substring result |
| // x10 unpacked_string pointer to unpacked string object |
| // x11 input_length length of input string |
| // x12 input_type instance type of input string |
| // x13 unpacked_char0 pointer to first char of unpacked string (uninit) |
| // x13 substring_char0 pointer to first char of substring (uninit) |
| // x14 result_char0 pointer to first char of result (uninit) |
| // x15 from substring start character offset |
| Register unpacked_char0 = x13; |
| Register substring_char0 = x13; |
| Register result_char0 = x14; |
| Label two_byte_sequential, sequential_string, allocate_result; |
| STATIC_ASSERT(kExternalStringTag != 0); |
| STATIC_ASSERT(kSeqStringTag == 0); |
| |
| __ Tst(input_type, kExternalStringTag); |
| __ B(eq, &sequential_string); |
| |
| __ Tst(input_type, kShortExternalStringTag); |
| __ B(ne, &runtime); |
| __ Ldr(unpacked_char0, |
| FieldMemOperand(unpacked_string, ExternalString::kResourceDataOffset)); |
| // unpacked_char0 points to the first character of the underlying string. |
| __ B(&allocate_result); |
| |
| __ Bind(&sequential_string); |
| // Locate first character of underlying subject string. |
| STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize); |
| __ Add(unpacked_char0, unpacked_string, |
| SeqOneByteString::kHeaderSize - kHeapObjectTag); |
| |
| __ Bind(&allocate_result); |
| // Sequential one-byte string. Allocate the result. |
| STATIC_ASSERT((kOneByteStringTag & kStringEncodingMask) != 0); |
| __ Tbz(input_type, MaskToBit(kStringEncodingMask), &two_byte_sequential); |
| |
| // Allocate and copy the resulting one-byte string. |
| __ AllocateOneByteString(result_string, result_length, x3, x4, x5, &runtime); |
| |
| // Locate first character of substring to copy. |
| __ Add(substring_char0, unpacked_char0, from); |
| |
| // Locate first character of result. |
| __ Add(result_char0, result_string, |
| SeqOneByteString::kHeaderSize - kHeapObjectTag); |
| |
| STATIC_ASSERT((SeqOneByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
| __ CopyBytes(result_char0, substring_char0, result_length, x3, kCopyLong); |
| __ B(&return_x0); |
| |
| // Allocate and copy the resulting two-byte string. |
| __ Bind(&two_byte_sequential); |
| __ AllocateTwoByteString(result_string, result_length, x3, x4, x5, &runtime); |
| |
| // Locate first character of substring to copy. |
| __ Add(substring_char0, unpacked_char0, Operand(from, LSL, 1)); |
| |
| // Locate first character of result. |
| __ Add(result_char0, result_string, |
| SeqTwoByteString::kHeaderSize - kHeapObjectTag); |
| |
| STATIC_ASSERT((SeqTwoByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
| __ Add(result_length, result_length, result_length); |
| __ CopyBytes(result_char0, substring_char0, result_length, x3, kCopyLong); |
| |
| __ Bind(&return_x0); |
| Counters* counters = isolate()->counters(); |
| __ IncrementCounter(counters->sub_string_native(), 1, x3, x4); |
| __ Drop(3); |
| __ Ret(); |
| |
| __ Bind(&runtime); |
| __ TailCallRuntime(Runtime::kSubString); |
| |
| __ bind(&single_char); |
| // x1: result_length |
| // x10: input_string |
| // x12: input_type |
| // x15: from (untagged) |
| __ SmiTag(from); |
| StringCharAtGenerator generator(input_string, from, result_length, x0, |
| &runtime, &runtime, &runtime, |
| STRING_INDEX_IS_NUMBER, RECEIVER_IS_STRING); |
| generator.GenerateFast(masm); |
| __ Drop(3); |
| __ Ret(); |
| generator.SkipSlow(masm, &runtime); |
| } |
| |
| |
| void ToNumberStub::Generate(MacroAssembler* masm) { |
| // The ToNumber stub takes one argument in x0. |
| Label not_smi; |
| __ JumpIfNotSmi(x0, ¬_smi); |
| __ Ret(); |
| __ Bind(¬_smi); |
| |
| Label not_heap_number; |
| __ Ldr(x1, FieldMemOperand(x0, HeapObject::kMapOffset)); |
| __ Ldrb(x1, FieldMemOperand(x1, Map::kInstanceTypeOffset)); |
| // x0: object |
| // x1: instance type |
| __ Cmp(x1, HEAP_NUMBER_TYPE); |
| __ B(ne, ¬_heap_number); |
| __ Ret(); |
| __ Bind(¬_heap_number); |
| |
| Label not_string, slow_string; |
| __ Cmp(x1, FIRST_NONSTRING_TYPE); |
| __ B(hs, ¬_string); |
| // Check if string has a cached array index. |
| __ Ldr(x2, FieldMemOperand(x0, String::kHashFieldOffset)); |
| __ Tst(x2, Operand(String::kContainsCachedArrayIndexMask)); |
| __ B(ne, &slow_string); |
| __ IndexFromHash(x2, x0); |
| __ Ret(); |
| __ Bind(&slow_string); |
| __ Push(x0); // Push argument. |
| __ TailCallRuntime(Runtime::kStringToNumber); |
| __ Bind(¬_string); |
| |
| Label not_oddball; |
| __ Cmp(x1, ODDBALL_TYPE); |
| __ B(ne, ¬_oddball); |
| __ Ldr(x0, FieldMemOperand(x0, Oddball::kToNumberOffset)); |
| __ Ret(); |
| __ Bind(¬_oddball); |
| |
| __ Push(x0); // Push argument. |
| __ TailCallRuntime(Runtime::kToNumber); |
| } |
| |
| |
| void ToLengthStub::Generate(MacroAssembler* masm) { |
| // The ToLength stub takes one argument in x0. |
| Label not_smi; |
| __ JumpIfNotSmi(x0, ¬_smi); |
| STATIC_ASSERT(kSmiTag == 0); |
| __ Tst(x0, x0); |
| __ Csel(x0, x0, Operand(0), ge); |
| __ Ret(); |
| __ Bind(¬_smi); |
| |
| __ Push(x0); // Push argument. |
| __ TailCallRuntime(Runtime::kToLength); |
| } |
| |
| |
| void ToStringStub::Generate(MacroAssembler* masm) { |
| // The ToString stub takes one argument in x0. |
| Label is_number; |
| __ JumpIfSmi(x0, &is_number); |
| |
| Label not_string; |
| __ JumpIfObjectType(x0, x1, x1, FIRST_NONSTRING_TYPE, ¬_string, hs); |
| // x0: receiver |
| // x1: receiver instance type |
| __ Ret(); |
| __ Bind(¬_string); |
| |
| Label not_heap_number; |
| __ Cmp(x1, HEAP_NUMBER_TYPE); |
| __ B(ne, ¬_heap_number); |
| __ Bind(&is_number); |
| NumberToStringStub stub(isolate()); |
| __ TailCallStub(&stub); |
| __ Bind(¬_heap_number); |
| |
| Label not_oddball; |
| __ Cmp(x1, ODDBALL_TYPE); |
| __ B(ne, ¬_oddball); |
| __ Ldr(x0, FieldMemOperand(x0, Oddball::kToStringOffset)); |
| __ Ret(); |
| __ Bind(¬_oddball); |
| |
| __ Push(x0); // Push argument. |
| __ TailCallRuntime(Runtime::kToString); |
| } |
| |
| |
| void ToNameStub::Generate(MacroAssembler* masm) { |
| // The ToName stub takes one argument in x0. |
| Label is_number; |
| __ JumpIfSmi(x0, &is_number); |
| |
| Label not_name; |
| STATIC_ASSERT(FIRST_NAME_TYPE == FIRST_TYPE); |
| __ JumpIfObjectType(x0, x1, x1, LAST_NAME_TYPE, ¬_name, hi); |
| // x0: receiver |
| // x1: receiver instance type |
| __ Ret(); |
| __ Bind(¬_name); |
| |
| Label not_heap_number; |
| __ Cmp(x1, HEAP_NUMBER_TYPE); |
| __ B(ne, ¬_heap_number); |
| __ Bind(&is_number); |
| NumberToStringStub stub(isolate()); |
| __ TailCallStub(&stub); |
| __ Bind(¬_heap_number); |
| |
| Label not_oddball; |
| __ Cmp(x1, ODDBALL_TYPE); |
| __ B(ne, ¬_oddball); |
| __ Ldr(x0, FieldMemOperand(x0, Oddball::kToStringOffset)); |
| __ Ret(); |
| __ Bind(¬_oddball); |
| |
| __ Push(x0); // Push argument. |
| __ TailCallRuntime(Runtime::kToName); |
| } |
| |
| |
| void StringHelper::GenerateFlatOneByteStringEquals( |
| MacroAssembler* masm, Register left, Register right, Register scratch1, |
| Register scratch2, Register scratch3) { |
| DCHECK(!AreAliased(left, right, scratch1, scratch2, scratch3)); |
| Register result = x0; |
| Register left_length = scratch1; |
| Register right_length = scratch2; |
| |
| // Compare lengths. If lengths differ, strings can't be equal. Lengths are |
| // smis, and don't need to be untagged. |
| Label strings_not_equal, check_zero_length; |
| __ Ldr(left_length, FieldMemOperand(left, String::kLengthOffset)); |
| __ Ldr(right_length, FieldMemOperand(right, String::kLengthOffset)); |
| __ Cmp(left_length, right_length); |
| __ B(eq, &check_zero_length); |
| |
| __ Bind(&strings_not_equal); |
| __ Mov(result, Smi::FromInt(NOT_EQUAL)); |
| __ Ret(); |
| |
| // Check if the length is zero. If so, the strings must be equal (and empty.) |
| Label compare_chars; |
| __ Bind(&check_zero_length); |
| STATIC_ASSERT(kSmiTag == 0); |
| __ Cbnz(left_length, &compare_chars); |
| __ Mov(result, Smi::FromInt(EQUAL)); |
| __ Ret(); |
| |
| // Compare characters. Falls through if all characters are equal. |
| __ Bind(&compare_chars); |
| GenerateOneByteCharsCompareLoop(masm, left, right, left_length, scratch2, |
| scratch3, &strings_not_equal); |
| |
| // Characters in strings are equal. |
| __ Mov(result, Smi::FromInt(EQUAL)); |
| __ Ret(); |
| } |
| |
| |
| void StringHelper::GenerateCompareFlatOneByteStrings( |
| MacroAssembler* masm, Register left, Register right, Register scratch1, |
| Register scratch2, Register scratch3, Register scratch4) { |
| DCHECK(!AreAliased(left, right, scratch1, scratch2, scratch3, scratch4)); |
| Label result_not_equal, compare_lengths; |
| |
| // Find minimum length and length difference. |
| Register length_delta = scratch3; |
| __ Ldr(scratch1, FieldMemOperand(left, String::kLengthOffset)); |
| __ Ldr(scratch2, FieldMemOperand(right, String::kLengthOffset)); |
| __ Subs(length_delta, scratch1, scratch2); |
| |
| Register min_length = scratch1; |
| __ Csel(min_length, scratch2, scratch1, gt); |
| __ Cbz(min_length, &compare_lengths); |
| |
| // Compare loop. |
| GenerateOneByteCharsCompareLoop(masm, left, right, min_length, scratch2, |
| scratch4, &result_not_equal); |
| |
| // Compare lengths - strings up to min-length are equal. |
| __ Bind(&compare_lengths); |
| |
| DCHECK(Smi::FromInt(EQUAL) == static_cast<Smi*>(0)); |
| |
| // Use length_delta as result if it's zero. |
| Register result = x0; |
| __ Subs(result, length_delta, 0); |
| |
| __ Bind(&result_not_equal); |
| Register greater = x10; |
| Register less = x11; |
| __ Mov(greater, Smi::FromInt(GREATER)); |
| __ Mov(less, Smi::FromInt(LESS)); |
| __ CmovX(result, greater, gt); |
| __ CmovX(result, less, lt); |
| __ Ret(); |
| } |
| |
| |
| void StringHelper::GenerateOneByteCharsCompareLoop( |
| MacroAssembler* masm, Register left, Register right, Register length, |
| Register scratch1, Register scratch2, Label* chars_not_equal) { |
| DCHECK(!AreAliased(left, right, length, scratch1, scratch2)); |
| |
| // Change index to run from -length to -1 by adding length to string |
| // start. This means that loop ends when index reaches zero, which |
| // doesn't need an additional compare. |
| __ SmiUntag(length); |
| __ Add(scratch1, length, SeqOneByteString::kHeaderSize - kHeapObjectTag); |
| __ Add(left, left, scratch1); |
| __ Add(right, right, scratch1); |
| |
| Register index = length; |
| __ Neg(index, length); // index = -length; |
| |
| // Compare loop |
| Label loop; |
| __ Bind(&loop); |
| __ Ldrb(scratch1, MemOperand(left, index)); |
| __ Ldrb(scratch2, MemOperand(right, index)); |
| __ Cmp(scratch1, scratch2); |
| __ B(ne, chars_not_equal); |
| __ Add(index, index, 1); |
| __ Cbnz(index, &loop); |
| } |
| |
| |
| void StringCompareStub::Generate(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x1 : left |
| // -- x0 : right |
| // -- lr : return address |
| // ----------------------------------- |
| __ AssertString(x1); |
| __ AssertString(x0); |
| |
| Label not_same; |
| __ Cmp(x0, x1); |
| __ B(ne, ¬_same); |
| __ Mov(x0, Smi::FromInt(EQUAL)); |
| __ IncrementCounter(isolate()->counters()->string_compare_native(), 1, x3, |
| x4); |
| __ Ret(); |
| |
| __ Bind(¬_same); |
| |
| // Check that both objects are sequential one-byte strings. |
| Label runtime; |
| __ JumpIfEitherIsNotSequentialOneByteStrings(x1, x0, x12, x13, &runtime); |
| |
| // Compare flat one-byte strings natively. |
| __ IncrementCounter(isolate()->counters()->string_compare_native(), 1, x3, |
| x4); |
| StringHelper::GenerateCompareFlatOneByteStrings(masm, x1, x0, x12, x13, x14, |
| x15); |
| |
| // Call the runtime. |
| // Returns -1 (less), 0 (equal), or 1 (greater) tagged as a small integer. |
| __ Bind(&runtime); |
| __ Push(x1, x0); |
| __ TailCallRuntime(Runtime::kStringCompare); |
| } |
| |
| |
| void BinaryOpICWithAllocationSiteStub::Generate(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x1 : left |
| // -- x0 : right |
| // -- lr : return address |
| // ----------------------------------- |
| |
| // Load x2 with the allocation site. We stick an undefined dummy value here |
| // and replace it with the real allocation site later when we instantiate this |
| // stub in BinaryOpICWithAllocationSiteStub::GetCodeCopyFromTemplate(). |
| __ LoadObject(x2, handle(isolate()->heap()->undefined_value())); |
| |
| // Make sure that we actually patched the allocation site. |
| if (FLAG_debug_code) { |
| __ AssertNotSmi(x2, kExpectedAllocationSite); |
| __ Ldr(x10, FieldMemOperand(x2, HeapObject::kMapOffset)); |
| __ AssertRegisterIsRoot(x10, Heap::kAllocationSiteMapRootIndex, |
| kExpectedAllocationSite); |
| } |
| |
| // Tail call into the stub that handles binary operations with allocation |
| // sites. |
| BinaryOpWithAllocationSiteStub stub(isolate(), state()); |
| __ TailCallStub(&stub); |
| } |
| |
| |
| void RecordWriteStub::GenerateIncremental(MacroAssembler* masm, Mode mode) { |
| // We need some extra registers for this stub, they have been allocated |
| // but we need to save them before using them. |
| regs_.Save(masm); |
| |
| if (remembered_set_action() == EMIT_REMEMBERED_SET) { |
| Label dont_need_remembered_set; |
| |
| Register val = regs_.scratch0(); |
| __ Ldr(val, MemOperand(regs_.address())); |
| __ JumpIfNotInNewSpace(val, &dont_need_remembered_set); |
| |
| __ JumpIfInNewSpace(regs_.object(), &dont_need_remembered_set); |
| |
| // First notify the incremental marker if necessary, then update the |
| // remembered set. |
| CheckNeedsToInformIncrementalMarker( |
| masm, kUpdateRememberedSetOnNoNeedToInformIncrementalMarker, mode); |
| InformIncrementalMarker(masm); |
| regs_.Restore(masm); // Restore the extra scratch registers we used. |
| |
| __ RememberedSetHelper(object(), address(), |
| value(), // scratch1 |
| save_fp_regs_mode(), MacroAssembler::kReturnAtEnd); |
| |
| __ Bind(&dont_need_remembered_set); |
| } |
| |
| CheckNeedsToInformIncrementalMarker( |
| masm, kReturnOnNoNeedToInformIncrementalMarker, mode); |
| InformIncrementalMarker(masm); |
| regs_.Restore(masm); // Restore the extra scratch registers we used. |
| __ Ret(); |
| } |
| |
| |
| void RecordWriteStub::InformIncrementalMarker(MacroAssembler* masm) { |
| regs_.SaveCallerSaveRegisters(masm, save_fp_regs_mode()); |
| Register address = |
| x0.Is(regs_.address()) ? regs_.scratch0() : regs_.address(); |
| DCHECK(!address.Is(regs_.object())); |
| DCHECK(!address.Is(x0)); |
| __ Mov(address, regs_.address()); |
| __ Mov(x0, regs_.object()); |
| __ Mov(x1, address); |
| __ Mov(x2, ExternalReference::isolate_address(isolate())); |
| |
| AllowExternalCallThatCantCauseGC scope(masm); |
| ExternalReference function = |
| ExternalReference::incremental_marking_record_write_function( |
| isolate()); |
| __ CallCFunction(function, 3, 0); |
| |
| regs_.RestoreCallerSaveRegisters(masm, save_fp_regs_mode()); |
| } |
| |
| |
| void RecordWriteStub::CheckNeedsToInformIncrementalMarker( |
| MacroAssembler* masm, |
| OnNoNeedToInformIncrementalMarker on_no_need, |
| Mode mode) { |
| Label on_black; |
| Label need_incremental; |
| Label need_incremental_pop_scratch; |
| |
| Register mem_chunk = regs_.scratch0(); |
| Register counter = regs_.scratch1(); |
| __ Bic(mem_chunk, regs_.object(), Page::kPageAlignmentMask); |
| __ Ldr(counter, |
| MemOperand(mem_chunk, MemoryChunk::kWriteBarrierCounterOffset)); |
| __ Subs(counter, counter, 1); |
| __ Str(counter, |
| MemOperand(mem_chunk, MemoryChunk::kWriteBarrierCounterOffset)); |
| __ B(mi, &need_incremental); |
| |
| // If the object is not black we don't have to inform the incremental marker. |
| __ JumpIfBlack(regs_.object(), regs_.scratch0(), regs_.scratch1(), &on_black); |
| |
| regs_.Restore(masm); // Restore the extra scratch registers we used. |
| if (on_no_need == kUpdateRememberedSetOnNoNeedToInformIncrementalMarker) { |
| __ RememberedSetHelper(object(), address(), |
| value(), // scratch1 |
| save_fp_regs_mode(), MacroAssembler::kReturnAtEnd); |
| } else { |
| __ Ret(); |
| } |
| |
| __ Bind(&on_black); |
| // Get the value from the slot. |
| Register val = regs_.scratch0(); |
| __ Ldr(val, MemOperand(regs_.address())); |
| |
| if (mode == INCREMENTAL_COMPACTION) { |
| Label ensure_not_white; |
| |
| __ CheckPageFlagClear(val, regs_.scratch1(), |
| MemoryChunk::kEvacuationCandidateMask, |
| &ensure_not_white); |
| |
| __ CheckPageFlagClear(regs_.object(), |
| regs_.scratch1(), |
| MemoryChunk::kSkipEvacuationSlotsRecordingMask, |
| &need_incremental); |
| |
| __ Bind(&ensure_not_white); |
| } |
| |
| // We need extra registers for this, so we push the object and the address |
| // register temporarily. |
| __ Push(regs_.address(), regs_.object()); |
| __ JumpIfWhite(val, |
| regs_.scratch1(), // Scratch. |
| regs_.object(), // Scratch. |
| regs_.address(), // Scratch. |
| regs_.scratch2(), // Scratch. |
| &need_incremental_pop_scratch); |
| __ Pop(regs_.object(), regs_.address()); |
| |
| regs_.Restore(masm); // Restore the extra scratch registers we used. |
| if (on_no_need == kUpdateRememberedSetOnNoNeedToInformIncrementalMarker) { |
| __ RememberedSetHelper(object(), address(), |
| value(), // scratch1 |
| save_fp_regs_mode(), MacroAssembler::kReturnAtEnd); |
| } else { |
| __ Ret(); |
| } |
| |
| __ Bind(&need_incremental_pop_scratch); |
| __ Pop(regs_.object(), regs_.address()); |
| |
| __ Bind(&need_incremental); |
| // Fall through when we need to inform the incremental marker. |
| } |
| |
| |
| void RecordWriteStub::Generate(MacroAssembler* masm) { |
| Label skip_to_incremental_noncompacting; |
| Label skip_to_incremental_compacting; |
| |
| // We patch these two first instructions back and forth between a nop and |
| // real branch when we start and stop incremental heap marking. |
| // Initially the stub is expected to be in STORE_BUFFER_ONLY mode, so 2 nops |
| // are generated. |
| // See RecordWriteStub::Patch for details. |
| { |
| InstructionAccurateScope scope(masm, 2); |
| __ adr(xzr, &skip_to_incremental_noncompacting); |
| __ adr(xzr, &skip_to_incremental_compacting); |
| } |
| |
| if (remembered_set_action() == EMIT_REMEMBERED_SET) { |
| __ RememberedSetHelper(object(), address(), |
| value(), // scratch1 |
| save_fp_regs_mode(), MacroAssembler::kReturnAtEnd); |
| } |
| __ Ret(); |
| |
| __ Bind(&skip_to_incremental_noncompacting); |
| GenerateIncremental(masm, INCREMENTAL); |
| |
| __ Bind(&skip_to_incremental_compacting); |
| GenerateIncremental(masm, INCREMENTAL_COMPACTION); |
| } |
| |
| |
| void StubFailureTrampolineStub::Generate(MacroAssembler* masm) { |
| CEntryStub ces(isolate(), 1, kSaveFPRegs); |
| __ Call(ces.GetCode(), RelocInfo::CODE_TARGET); |
| int parameter_count_offset = |
| StubFailureTrampolineFrame::kCallerStackParameterCountFrameOffset; |
| __ Ldr(x1, MemOperand(fp, parameter_count_offset)); |
| if (function_mode() == JS_FUNCTION_STUB_MODE) { |
| __ Add(x1, x1, 1); |
| } |
| masm->LeaveFrame(StackFrame::STUB_FAILURE_TRAMPOLINE); |
| __ Drop(x1); |
| // Return to IC Miss stub, continuation still on stack. |
| __ Ret(); |
| } |
| |
| |
| void LoadICTrampolineStub::Generate(MacroAssembler* masm) { |
| __ EmitLoadTypeFeedbackVector(LoadWithVectorDescriptor::VectorRegister()); |
| LoadICStub stub(isolate(), state()); |
| stub.GenerateForTrampoline(masm); |
| } |
| |
| |
| void KeyedLoadICTrampolineStub::Generate(MacroAssembler* masm) { |
| __ EmitLoadTypeFeedbackVector(LoadWithVectorDescriptor::VectorRegister()); |
| KeyedLoadICStub stub(isolate(), state()); |
| stub.GenerateForTrampoline(masm); |
| } |
| |
| |
| void CallICTrampolineStub::Generate(MacroAssembler* masm) { |
| __ EmitLoadTypeFeedbackVector(x2); |
| CallICStub stub(isolate(), state()); |
| __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET); |
| } |
| |
| |
| void LoadICStub::Generate(MacroAssembler* masm) { GenerateImpl(masm, false); } |
| |
| |
| void LoadICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| GenerateImpl(masm, true); |
| } |
| |
| |
| static void HandleArrayCases(MacroAssembler* masm, Register feedback, |
| Register receiver_map, Register scratch1, |
| Register scratch2, bool is_polymorphic, |
| Label* miss) { |
| // feedback initially contains the feedback array |
| Label next_loop, prepare_next; |
| Label load_smi_map, compare_map; |
| Label start_polymorphic; |
| |
| Register cached_map = scratch1; |
| |
| __ Ldr(cached_map, |
| FieldMemOperand(feedback, FixedArray::OffsetOfElementAt(0))); |
| __ Ldr(cached_map, FieldMemOperand(cached_map, WeakCell::kValueOffset)); |
| __ Cmp(receiver_map, cached_map); |
| __ B(ne, &start_polymorphic); |
| // found, now call handler. |
| Register handler = feedback; |
| __ Ldr(handler, FieldMemOperand(feedback, FixedArray::OffsetOfElementAt(1))); |
| __ Add(handler, handler, Code::kHeaderSize - kHeapObjectTag); |
| __ Jump(feedback); |
| |
| Register length = scratch2; |
| __ Bind(&start_polymorphic); |
| __ Ldr(length, FieldMemOperand(feedback, FixedArray::kLengthOffset)); |
| if (!is_polymorphic) { |
| __ Cmp(length, Operand(Smi::FromInt(2))); |
| __ B(eq, miss); |
| } |
| |
| Register too_far = length; |
| Register pointer_reg = feedback; |
| |
| // +-----+------+------+-----+-----+ ... ----+ |
| // | map | len | wm0 | h0 | wm1 | hN | |
| // +-----+------+------+-----+-----+ ... ----+ |
| // 0 1 2 len-1 |
| // ^ ^ |
| // | | |
| // pointer_reg too_far |
| // aka feedback scratch2 |
| // also need receiver_map |
| // use cached_map (scratch1) to look in the weak map values. |
| __ Add(too_far, feedback, |
| Operand::UntagSmiAndScale(length, kPointerSizeLog2)); |
| __ Add(too_far, too_far, FixedArray::kHeaderSize - kHeapObjectTag); |
| __ Add(pointer_reg, feedback, |
| FixedArray::OffsetOfElementAt(2) - kHeapObjectTag); |
| |
| __ Bind(&next_loop); |
| __ Ldr(cached_map, MemOperand(pointer_reg)); |
| __ Ldr(cached_map, FieldMemOperand(cached_map, WeakCell::kValueOffset)); |
| __ Cmp(receiver_map, cached_map); |
| __ B(ne, &prepare_next); |
| __ Ldr(handler, MemOperand(pointer_reg, kPointerSize)); |
| __ Add(handler, handler, Code::kHeaderSize - kHeapObjectTag); |
| __ Jump(handler); |
| |
| __ Bind(&prepare_next); |
| __ Add(pointer_reg, pointer_reg, kPointerSize * 2); |
| __ Cmp(pointer_reg, too_far); |
| __ B(lt, &next_loop); |
| |
| // We exhausted our array of map handler pairs. |
| __ jmp(miss); |
| } |
| |
| |
| static void HandleMonomorphicCase(MacroAssembler* masm, Register receiver, |
| Register receiver_map, Register feedback, |
| Register vector, Register slot, |
| Register scratch, Label* compare_map, |
| Label* load_smi_map, Label* try_array) { |
| __ JumpIfSmi(receiver, load_smi_map); |
| __ Ldr(receiver_map, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| __ bind(compare_map); |
| Register cached_map = scratch; |
| // Move the weak map into the weak_cell register. |
| __ Ldr(cached_map, FieldMemOperand(feedback, WeakCell::kValueOffset)); |
| __ Cmp(cached_map, receiver_map); |
| __ B(ne, try_array); |
| |
| Register handler = feedback; |
| __ Add(handler, vector, Operand::UntagSmiAndScale(slot, kPointerSizeLog2)); |
| __ Ldr(handler, |
| FieldMemOperand(handler, FixedArray::kHeaderSize + kPointerSize)); |
| __ Add(handler, handler, Code::kHeaderSize - kHeapObjectTag); |
| __ Jump(handler); |
| } |
| |
| |
| void LoadICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| Register receiver = LoadWithVectorDescriptor::ReceiverRegister(); // x1 |
| Register name = LoadWithVectorDescriptor::NameRegister(); // x2 |
| Register vector = LoadWithVectorDescriptor::VectorRegister(); // x3 |
| Register slot = LoadWithVectorDescriptor::SlotRegister(); // x0 |
| Register feedback = x4; |
| Register receiver_map = x5; |
| Register scratch1 = x6; |
| |
| __ Add(feedback, vector, Operand::UntagSmiAndScale(slot, kPointerSizeLog2)); |
| __ Ldr(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| |
| // Try to quickly handle the monomorphic case without knowing for sure |
| // if we have a weak cell in feedback. We do know it's safe to look |
| // at WeakCell::kValueOffset. |
| Label try_array, load_smi_map, compare_map; |
| Label not_array, miss; |
| HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| scratch1, &compare_map, &load_smi_map, &try_array); |
| |
| // Is it a fixed array? |
| __ Bind(&try_array); |
| __ Ldr(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| __ JumpIfNotRoot(scratch1, Heap::kFixedArrayMapRootIndex, ¬_array); |
| HandleArrayCases(masm, feedback, receiver_map, scratch1, x7, true, &miss); |
| |
| __ Bind(¬_array); |
| __ JumpIfNotRoot(feedback, Heap::kmegamorphic_symbolRootIndex, &miss); |
| Code::Flags code_flags = Code::RemoveTypeAndHolderFromFlags( |
| Code::ComputeHandlerFlags(Code::LOAD_IC)); |
| masm->isolate()->stub_cache()->GenerateProbe(masm, Code::LOAD_IC, code_flags, |
| receiver, name, feedback, |
| receiver_map, scratch1, x7); |
| |
| __ Bind(&miss); |
| LoadIC::GenerateMiss(masm); |
| |
| __ Bind(&load_smi_map); |
| __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| __ jmp(&compare_map); |
| } |
| |
| |
| void KeyedLoadICStub::Generate(MacroAssembler* masm) { |
| GenerateImpl(masm, false); |
| } |
| |
| |
| void KeyedLoadICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| GenerateImpl(masm, true); |
| } |
| |
| |
| void KeyedLoadICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| Register receiver = LoadWithVectorDescriptor::ReceiverRegister(); // x1 |
| Register key = LoadWithVectorDescriptor::NameRegister(); // x2 |
| Register vector = LoadWithVectorDescriptor::VectorRegister(); // x3 |
| Register slot = LoadWithVectorDescriptor::SlotRegister(); // x0 |
| Register feedback = x4; |
| Register receiver_map = x5; |
| Register scratch1 = x6; |
| |
| __ Add(feedback, vector, Operand::UntagSmiAndScale(slot, kPointerSizeLog2)); |
| __ Ldr(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| |
| // Try to quickly handle the monomorphic case without knowing for sure |
| // if we have a weak cell in feedback. We do know it's safe to look |
| // at WeakCell::kValueOffset. |
| Label try_array, load_smi_map, compare_map; |
| Label not_array, miss; |
| HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| scratch1, &compare_map, &load_smi_map, &try_array); |
| |
| __ Bind(&try_array); |
| // Is it a fixed array? |
| __ Ldr(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| __ JumpIfNotRoot(scratch1, Heap::kFixedArrayMapRootIndex, ¬_array); |
| |
| // We have a polymorphic element handler. |
| Label polymorphic, try_poly_name; |
| __ Bind(&polymorphic); |
| HandleArrayCases(masm, feedback, receiver_map, scratch1, x7, true, &miss); |
| |
| __ Bind(¬_array); |
| // Is it generic? |
| __ JumpIfNotRoot(feedback, Heap::kmegamorphic_symbolRootIndex, |
| &try_poly_name); |
| Handle<Code> megamorphic_stub = |
| KeyedLoadIC::ChooseMegamorphicStub(masm->isolate(), GetExtraICState()); |
| __ Jump(megamorphic_stub, RelocInfo::CODE_TARGET); |
| |
| __ Bind(&try_poly_name); |
| // We might have a name in feedback, and a fixed array in the next slot. |
| __ Cmp(key, feedback); |
| __ B(ne, &miss); |
| // If the name comparison succeeded, we know we have a fixed array with |
| // at least one map/handler pair. |
| __ Add(feedback, vector, Operand::UntagSmiAndScale(slot, kPointerSizeLog2)); |
| __ Ldr(feedback, |
| FieldMemOperand(feedback, FixedArray::kHeaderSize + kPointerSize)); |
| HandleArrayCases(masm, feedback, receiver_map, scratch1, x7, false, &miss); |
| |
| __ Bind(&miss); |
| KeyedLoadIC::GenerateMiss(masm); |
| |
| __ Bind(&load_smi_map); |
| __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| __ jmp(&compare_map); |
| } |
| |
| |
| void VectorStoreICTrampolineStub::Generate(MacroAssembler* masm) { |
| __ EmitLoadTypeFeedbackVector(VectorStoreICDescriptor::VectorRegister()); |
| VectorStoreICStub stub(isolate(), state()); |
| stub.GenerateForTrampoline(masm); |
| } |
| |
| |
| void VectorKeyedStoreICTrampolineStub::Generate(MacroAssembler* masm) { |
| __ EmitLoadTypeFeedbackVector(VectorStoreICDescriptor::VectorRegister()); |
| VectorKeyedStoreICStub stub(isolate(), state()); |
| stub.GenerateForTrampoline(masm); |
| } |
| |
| |
| void VectorStoreICStub::Generate(MacroAssembler* masm) { |
| GenerateImpl(masm, false); |
| } |
| |
| |
| void VectorStoreICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| GenerateImpl(masm, true); |
| } |
| |
| |
| void VectorStoreICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| Register receiver = VectorStoreICDescriptor::ReceiverRegister(); // x1 |
| Register key = VectorStoreICDescriptor::NameRegister(); // x2 |
| Register vector = VectorStoreICDescriptor::VectorRegister(); // x3 |
| Register slot = VectorStoreICDescriptor::SlotRegister(); // x4 |
| DCHECK(VectorStoreICDescriptor::ValueRegister().is(x0)); // x0 |
| Register feedback = x5; |
| Register receiver_map = x6; |
| Register scratch1 = x7; |
| |
| __ Add(feedback, vector, Operand::UntagSmiAndScale(slot, kPointerSizeLog2)); |
| __ Ldr(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| |
| // Try to quickly handle the monomorphic case without knowing for sure |
| // if we have a weak cell in feedback. We do know it's safe to look |
| // at WeakCell::kValueOffset. |
| Label try_array, load_smi_map, compare_map; |
| Label not_array, miss; |
| HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| scratch1, &compare_map, &load_smi_map, &try_array); |
| |
| // Is it a fixed array? |
| __ Bind(&try_array); |
| __ Ldr(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| __ JumpIfNotRoot(scratch1, Heap::kFixedArrayMapRootIndex, ¬_array); |
| HandleArrayCases(masm, feedback, receiver_map, scratch1, x8, true, &miss); |
| |
| __ Bind(¬_array); |
| __ JumpIfNotRoot(feedback, Heap::kmegamorphic_symbolRootIndex, &miss); |
| Code::Flags code_flags = Code::RemoveTypeAndHolderFromFlags( |
| Code::ComputeHandlerFlags(Code::STORE_IC)); |
| masm->isolate()->stub_cache()->GenerateProbe(masm, Code::STORE_IC, code_flags, |
| receiver, key, feedback, |
| receiver_map, scratch1, x8); |
| |
| __ Bind(&miss); |
| StoreIC::GenerateMiss(masm); |
| |
| __ Bind(&load_smi_map); |
| __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| __ jmp(&compare_map); |
| } |
| |
| |
| void VectorKeyedStoreICStub::Generate(MacroAssembler* masm) { |
| GenerateImpl(masm, false); |
| } |
| |
| |
| void VectorKeyedStoreICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| GenerateImpl(masm, true); |
| } |
| |
| |
| static void HandlePolymorphicStoreCase(MacroAssembler* masm, Register feedback, |
| Register receiver_map, Register scratch1, |
| Register scratch2, Label* miss) { |
| // feedback initially contains the feedback array |
| Label next_loop, prepare_next; |
| Label start_polymorphic; |
| Label transition_call; |
| |
| Register cached_map = scratch1; |
| Register too_far = scratch2; |
| Register pointer_reg = feedback; |
| |
| __ Ldr(too_far, FieldMemOperand(feedback, FixedArray::kLengthOffset)); |
| |
| // +-----+------+------+-----+-----+-----+ ... ----+ |
| // | map | len | wm0 | wt0 | h0 | wm1 | hN | |
| // +-----+------+------+-----+-----+ ----+ ... ----+ |
| // 0 1 2 len-1 |
| // ^ ^ |
| // | | |
| // pointer_reg too_far |
| // aka feedback scratch2 |
| // also need receiver_map |
| // use cached_map (scratch1) to look in the weak map values. |
| __ Add(too_far, feedback, |
| Operand::UntagSmiAndScale(too_far, kPointerSizeLog2)); |
| __ Add(too_far, too_far, FixedArray::kHeaderSize - kHeapObjectTag); |
| __ Add(pointer_reg, feedback, |
| FixedArray::OffsetOfElementAt(0) - kHeapObjectTag); |
| |
| __ Bind(&next_loop); |
| __ Ldr(cached_map, MemOperand(pointer_reg)); |
| __ Ldr(cached_map, FieldMemOperand(cached_map, WeakCell::kValueOffset)); |
| __ Cmp(receiver_map, cached_map); |
| __ B(ne, &prepare_next); |
| // Is it a transitioning store? |
| __ Ldr(too_far, MemOperand(pointer_reg, kPointerSize)); |
| __ CompareRoot(too_far, Heap::kUndefinedValueRootIndex); |
| __ B(ne, &transition_call); |
| |
| __ Ldr(pointer_reg, MemOperand(pointer_reg, kPointerSize * 2)); |
| __ Add(pointer_reg, pointer_reg, Code::kHeaderSize - kHeapObjectTag); |
| __ Jump(pointer_reg); |
| |
| __ Bind(&transition_call); |
| __ Ldr(too_far, FieldMemOperand(too_far, WeakCell::kValueOffset)); |
| __ JumpIfSmi(too_far, miss); |
| |
| __ Ldr(receiver_map, MemOperand(pointer_reg, kPointerSize * 2)); |
| // Load the map into the correct register. |
| DCHECK(feedback.is(VectorStoreTransitionDescriptor::MapRegister())); |
| __ mov(feedback, too_far); |
| __ Add(receiver_map, receiver_map, Code::kHeaderSize - kHeapObjectTag); |
| __ Jump(receiver_map); |
| |
| __ Bind(&prepare_next); |
| __ Add(pointer_reg, pointer_reg, kPointerSize * 3); |
| __ Cmp(pointer_reg, too_far); |
| __ B(lt, &next_loop); |
| |
| // We exhausted our array of map handler pairs. |
| __ jmp(miss); |
| } |
| |
| |
| void VectorKeyedStoreICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| Register receiver = VectorStoreICDescriptor::ReceiverRegister(); // x1 |
| Register key = VectorStoreICDescriptor::NameRegister(); // x2 |
| Register vector = VectorStoreICDescriptor::VectorRegister(); // x3 |
| Register slot = VectorStoreICDescriptor::SlotRegister(); // x4 |
| DCHECK(VectorStoreICDescriptor::ValueRegister().is(x0)); // x0 |
| Register feedback = x5; |
| Register receiver_map = x6; |
| Register scratch1 = x7; |
| |
| __ Add(feedback, vector, Operand::UntagSmiAndScale(slot, kPointerSizeLog2)); |
| __ Ldr(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| |
| // Try to quickly handle the monomorphic case without knowing for sure |
| // if we have a weak cell in feedback. We do know it's safe to look |
| // at WeakCell::kValueOffset. |
| Label try_array, load_smi_map, compare_map; |
| Label not_array, miss; |
| HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| scratch1, &compare_map, &load_smi_map, &try_array); |
| |
| __ Bind(&try_array); |
| // Is it a fixed array? |
| __ Ldr(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| __ JumpIfNotRoot(scratch1, Heap::kFixedArrayMapRootIndex, ¬_array); |
| |
| // We have a polymorphic element handler. |
| Label try_poly_name; |
| HandlePolymorphicStoreCase(masm, feedback, receiver_map, scratch1, x8, &miss); |
| |
| __ Bind(¬_array); |
| // Is it generic? |
| __ JumpIfNotRoot(feedback, Heap::kmegamorphic_symbolRootIndex, |
| &try_poly_name); |
| Handle<Code> megamorphic_stub = |
| KeyedStoreIC::ChooseMegamorphicStub(masm->isolate(), GetExtraICState()); |
| __ Jump(megamorphic_stub, RelocInfo::CODE_TARGET); |
| |
| __ Bind(&try_poly_name); |
| // We might have a name in feedback, and a fixed array in the next slot. |
| __ Cmp(key, feedback); |
| __ B(ne, &miss); |
| // If the name comparison succeeded, we know we have a fixed array with |
| // at least one map/handler pair. |
| __ Add(feedback, vector, Operand::UntagSmiAndScale(slot, kPointerSizeLog2)); |
| __ Ldr(feedback, |
| FieldMemOperand(feedback, FixedArray::kHeaderSize + kPointerSize)); |
| HandleArrayCases(masm, feedback, receiver_map, scratch1, x8, false, &miss); |
| |
| __ Bind(&miss); |
| KeyedStoreIC::GenerateMiss(masm); |
| |
| __ Bind(&load_smi_map); |
| __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| __ jmp(&compare_map); |
| } |
| |
| |
| // The entry hook is a "BumpSystemStackPointer" instruction (sub), followed by |
| // a "Push lr" instruction, followed by a call. |
| static const unsigned int kProfileEntryHookCallSize = |
| Assembler::kCallSizeWithRelocation + (2 * kInstructionSize); |
| |
| |
| void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) { |
| if (masm->isolate()->function_entry_hook() != NULL) { |
| ProfileEntryHookStub stub(masm->isolate()); |
| Assembler::BlockConstPoolScope no_const_pools(masm); |
| DontEmitDebugCodeScope no_debug_code(masm); |
| Label entry_hook_call_start; |
| __ Bind(&entry_hook_call_start); |
| __ Push(lr); |
| __ CallStub(&stub); |
| DCHECK(masm->SizeOfCodeGeneratedSince(&entry_hook_call_start) == |
| kProfileEntryHookCallSize); |
| |
| __ Pop(lr); |
| } |
| } |
| |
| |
| void ProfileEntryHookStub::Generate(MacroAssembler* masm) { |
| MacroAssembler::NoUseRealAbortsScope no_use_real_aborts(masm); |
| |
| // Save all kCallerSaved registers (including lr), since this can be called |
| // from anywhere. |
| // TODO(jbramley): What about FP registers? |
| __ PushCPURegList(kCallerSaved); |
| DCHECK(kCallerSaved.IncludesAliasOf(lr)); |
| const int kNumSavedRegs = kCallerSaved.Count(); |
| |
| // Compute the function's address as the first argument. |
| __ Sub(x0, lr, kProfileEntryHookCallSize); |
| |
| #if V8_HOST_ARCH_ARM64 |
| uintptr_t entry_hook = |
| reinterpret_cast<uintptr_t>(isolate()->function_entry_hook()); |
| __ Mov(x10, entry_hook); |
| #else |
| // Under the simulator we need to indirect the entry hook through a trampoline |
| // function at a known address. |
| ApiFunction dispatcher(FUNCTION_ADDR(EntryHookTrampoline)); |
| __ Mov(x10, Operand(ExternalReference(&dispatcher, |
| ExternalReference::BUILTIN_CALL, |
| isolate()))); |
| // It additionally takes an isolate as a third parameter |
| __ Mov(x2, ExternalReference::isolate_address(isolate())); |
| #endif |
| |
| // The caller's return address is above the saved temporaries. |
| // Grab its location for the second argument to the hook. |
| __ Add(x1, __ StackPointer(), kNumSavedRegs * kPointerSize); |
| |
| { |
| // Create a dummy frame, as CallCFunction requires this. |
| FrameScope frame(masm, StackFrame::MANUAL); |
| __ CallCFunction(x10, 2, 0); |
| } |
| |
| __ PopCPURegList(kCallerSaved); |
| __ Ret(); |
| } |
| |
| |
| void DirectCEntryStub::Generate(MacroAssembler* masm) { |
| // When calling into C++ code the stack pointer must be csp. |
| // Therefore this code must use csp for peek/poke operations when the |
| // stub is generated. When the stub is called |
| // (via DirectCEntryStub::GenerateCall), the caller must setup an ExitFrame |
| // and configure the stack pointer *before* doing the call. |
| const Register old_stack_pointer = __ StackPointer(); |
| __ SetStackPointer(csp); |
| |
| // Put return address on the stack (accessible to GC through exit frame pc). |
| __ Poke(lr, 0); |
| // Call the C++ function. |
| __ Blr(x10); |
| // Return to calling code. |
| __ Peek(lr, 0); |
| __ AssertFPCRState(); |
| __ Ret(); |
| |
| __ SetStackPointer(old_stack_pointer); |
| } |
| |
| void DirectCEntryStub::GenerateCall(MacroAssembler* masm, |
| Register target) { |
| // Make sure the caller configured the stack pointer (see comment in |
| // DirectCEntryStub::Generate). |
| DCHECK(csp.Is(__ StackPointer())); |
| |
| intptr_t code = |
| reinterpret_cast<intptr_t>(GetCode().location()); |
| __ Mov(lr, Operand(code, RelocInfo::CODE_TARGET)); |
| __ Mov(x10, target); |
| // Branch to the stub. |
| __ Blr(lr); |
| } |
| |
| |
| // Probe the name dictionary in the 'elements' register. |
| // Jump to the 'done' label if a property with the given name is found. |
| // Jump to the 'miss' label otherwise. |
| // |
| // If lookup was successful 'scratch2' will be equal to elements + 4 * index. |
| // 'elements' and 'name' registers are preserved on miss. |
| void NameDictionaryLookupStub::GeneratePositiveLookup( |
| MacroAssembler* masm, |
| Label* miss, |
| Label* done, |
| Register elements, |
| Register name, |
| Register scratch1, |
| Register scratch2) { |
| DCHECK(!AreAliased(elements, name, scratch1, scratch2)); |
| |
| // Assert that name contains a string. |
| __ AssertName(name); |
| |
| // Compute the capacity mask. |
| __ Ldrsw(scratch1, UntagSmiFieldMemOperand(elements, kCapacityOffset)); |
| __ Sub(scratch1, scratch1, 1); |
| |
| // Generate an unrolled loop that performs a few probes before giving up. |
| for (int i = 0; i < kInlinedProbes; i++) { |
| // Compute the masked index: (hash + i + i * i) & mask. |
| __ Ldr(scratch2, FieldMemOperand(name, Name::kHashFieldOffset)); |
| if (i > 0) { |
| // Add the probe offset (i + i * i) left shifted to avoid right shifting |
| // the hash in a separate instruction. The value hash + i + i * i is right |
| // shifted in the following and instruction. |
| DCHECK(NameDictionary::GetProbeOffset(i) < |
| 1 << (32 - Name::kHashFieldOffset)); |
| __ Add(scratch2, scratch2, Operand( |
| NameDictionary::GetProbeOffset(i) << Name::kHashShift)); |
| } |
| __ And(scratch2, scratch1, Operand(scratch2, LSR, Name::kHashShift)); |
| |
| // Scale the index by multiplying by the element size. |
| STATIC_ASSERT(NameDictionary::kEntrySize == 3); |
| __ Add(scratch2, scratch2, Operand(scratch2, LSL, 1)); |
| |
| // Check if the key is identical to the name. |
| UseScratchRegisterScope temps(masm); |
| Register scratch3 = temps.AcquireX(); |
| __ Add(scratch2, elements, Operand(scratch2, LSL, kPointerSizeLog2)); |
| __ Ldr(scratch3, FieldMemOperand(scratch2, kElementsStartOffset)); |
| __ Cmp(name, scratch3); |
| __ B(eq, done); |
| } |
| |
| // The inlined probes didn't find the entry. |
| // Call the complete stub to scan the whole dictionary. |
| |
| CPURegList spill_list(CPURegister::kRegister, kXRegSizeInBits, 0, 6); |
| spill_list.Combine(lr); |
| spill_list.Remove(scratch1); |
| spill_list.Remove(scratch2); |
| |
| __ PushCPURegList(spill_list); |
| |
| if (name.is(x0)) { |
| DCHECK(!elements.is(x1)); |
| __ Mov(x1, name); |
| __ Mov(x0, elements); |
| } else { |
| __ Mov(x0, elements); |
| __ Mov(x1, name); |
| } |
| |
| Label not_found; |
| NameDictionaryLookupStub stub(masm->isolate(), POSITIVE_LOOKUP); |
| __ CallStub(&stub); |
| __ Cbz(x0, ¬_found); |
| __ Mov(scratch2, x2); // Move entry index into scratch2. |
| __ PopCPURegList(spill_list); |
| __ B(done); |
| |
| __ Bind(¬_found); |
| __ PopCPURegList(spill_list); |
| __ B(miss); |
| } |
| |
| |
| void NameDictionaryLookupStub::GenerateNegativeLookup(MacroAssembler* masm, |
| Label* miss, |
| Label* done, |
| Register receiver, |
| Register properties, |
| Handle<Name> name, |
| Register scratch0) { |
| DCHECK(!AreAliased(receiver, properties, scratch0)); |
| DCHECK(name->IsUniqueName()); |
| // If names of slots in range from 1 to kProbes - 1 for the hash value are |
| // not equal to the name and kProbes-th slot is not used (its name is the |
| // undefined value), it guarantees the hash table doesn't contain the |
| // property. It's true even if some slots represent deleted properties |
| // (their names are the hole value). |
| for (int i = 0; i < kInlinedProbes; i++) { |
| // scratch0 points to properties hash. |
| // Compute the masked index: (hash + i + i * i) & mask. |
| Register index = scratch0; |
| // Capacity is smi 2^n. |
| __ Ldrsw(index, UntagSmiFieldMemOperand(properties, kCapacityOffset)); |
| __ Sub(index, index, 1); |
| __ And(index, index, name->Hash() + NameDictionary::GetProbeOffset(i)); |
| |
| // Scale the index by multiplying by the entry size. |
| STATIC_ASSERT(NameDictionary::kEntrySize == 3); |
| __ Add(index, index, Operand(index, LSL, 1)); // index *= 3. |
| |
| Register entity_name = scratch0; |
| // Having undefined at this place means the name is not contained. |
| Register tmp = index; |
| __ Add(tmp, properties, Operand(index, LSL, kPointerSizeLog2)); |
| __ Ldr(entity_name, FieldMemOperand(tmp, kElementsStartOffset)); |
| |
| __ JumpIfRoot(entity_name, Heap::kUndefinedValueRootIndex, done); |
| |
| // Stop if found the property. |
| __ Cmp(entity_name, Operand(name)); |
| __ B(eq, miss); |
| |
| Label good; |
| __ JumpIfRoot(entity_name, Heap::kTheHoleValueRootIndex, &good); |
| |
| // Check if the entry name is not a unique name. |
| __ Ldr(entity_name, FieldMemOperand(entity_name, HeapObject::kMapOffset)); |
| __ Ldrb(entity_name, |
| FieldMemOperand(entity_name, Map::kInstanceTypeOffset)); |
| __ JumpIfNotUniqueNameInstanceType(entity_name, miss); |
| __ Bind(&good); |
| } |
| |
| CPURegList spill_list(CPURegister::kRegister, kXRegSizeInBits, 0, 6); |
| spill_list.Combine(lr); |
| spill_list.Remove(scratch0); // Scratch registers don't need to be preserved. |
| |
| __ PushCPURegList(spill_list); |
| |
| __ Ldr(x0, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
| __ Mov(x1, Operand(name)); |
| NameDictionaryLookupStub stub(masm->isolate(), NEGATIVE_LOOKUP); |
| __ CallStub(&stub); |
| // Move stub return value to scratch0. Note that scratch0 is not included in |
| // spill_list and won't be clobbered by PopCPURegList. |
| __ Mov(scratch0, x0); |
| __ PopCPURegList(spill_list); |
| |
| __ Cbz(scratch0, done); |
| __ B(miss); |
| } |
| |
| |
| void NameDictionaryLookupStub::Generate(MacroAssembler* masm) { |
| // This stub overrides SometimesSetsUpAFrame() to return false. That means |
| // we cannot call anything that could cause a GC from this stub. |
| // |
| // Arguments are in x0 and x1: |
| // x0: property dictionary. |
| // x1: the name of the property we are looking for. |
| // |
| // Return value is in x0 and is zero if lookup failed, non zero otherwise. |
| // If the lookup is successful, x2 will contains the index of the entry. |
| |
| Register result = x0; |
| Register dictionary = x0; |
| Register key = x1; |
| Register index = x2; |
| Register mask = x3; |
| Register hash = x4; |
| Register undefined = x5; |
| Register entry_key = x6; |
| |
| Label in_dictionary, maybe_in_dictionary, not_in_dictionary; |
| |
| __ Ldrsw(mask, UntagSmiFieldMemOperand(dictionary, kCapacityOffset)); |
| __ Sub(mask, mask, 1); |
| |
| __ Ldr(hash, FieldMemOperand(key, Name::kHashFieldOffset)); |
| __ LoadRoot(undefined, Heap::kUndefinedValueRootIndex); |
| |
| for (int i = kInlinedProbes; i < kTotalProbes; i++) { |
| // Compute the masked index: (hash + i + i * i) & mask. |
| // Capacity is smi 2^n. |
| if (i > 0) { |
| // Add the probe offset (i + i * i) left shifted to avoid right shifting |
| // the hash in a separate instruction. The value hash + i + i * i is right |
| // shifted in the following and instruction. |
| DCHECK(NameDictionary::GetProbeOffset(i) < |
| 1 << (32 - Name::kHashFieldOffset)); |
| __ Add(index, hash, |
| NameDictionary::GetProbeOffset(i) << Name::kHashShift); |
| } else { |
| __ Mov(index, hash); |
| } |
| __ And(index, mask, Operand(index, LSR, Name::kHashShift)); |
| |
| // Scale the index by multiplying by the entry size. |
| STATIC_ASSERT(NameDictionary::kEntrySize == 3); |
| __ Add(index, index, Operand(index, LSL, 1)); // index *= 3. |
| |
| __ Add(index, dictionary, Operand(index, LSL, kPointerSizeLog2)); |
| __ Ldr(entry_key, FieldMemOperand(index, kElementsStartOffset)); |
| |
| // Having undefined at this place means the name is not contained. |
| __ Cmp(entry_key, undefined); |
| __ B(eq, ¬_in_dictionary); |
| |
| // Stop if found the property. |
| __ Cmp(entry_key, key); |
| __ B(eq, &in_dictionary); |
| |
| if (i != kTotalProbes - 1 && mode() == NEGATIVE_LOOKUP) { |
| // Check if the entry name is not a unique name. |
| __ Ldr(entry_key, FieldMemOperand(entry_key, HeapObject::kMapOffset)); |
| __ Ldrb(entry_key, FieldMemOperand(entry_key, Map::kInstanceTypeOffset)); |
| __ JumpIfNotUniqueNameInstanceType(entry_key, &maybe_in_dictionary); |
| } |
| } |
| |
| __ Bind(&maybe_in_dictionary); |
| // If we are doing negative lookup then probing failure should be |
| // treated as a lookup success. For positive lookup, probing failure |
| // should be treated as lookup failure. |
| if (mode() == POSITIVE_LOOKUP) { |
| __ Mov(result, 0); |
| __ Ret(); |
| } |
| |
| __ Bind(&in_dictionary); |
| __ Mov(result, 1); |
| __ Ret(); |
| |
| __ Bind(¬_in_dictionary); |
| __ Mov(result, 0); |
| __ Ret(); |
| } |
| |
| |
| template<class T> |
| static void CreateArrayDispatch(MacroAssembler* masm, |
| AllocationSiteOverrideMode mode) { |
| ASM_LOCATION("CreateArrayDispatch"); |
| if (mode == DISABLE_ALLOCATION_SITES) { |
| T stub(masm->isolate(), GetInitialFastElementsKind(), mode); |
| __ TailCallStub(&stub); |
| |
| } else if (mode == DONT_OVERRIDE) { |
| Register kind = x3; |
| int last_index = |
| GetSequenceIndexFromFastElementsKind(TERMINAL_FAST_ELEMENTS_KIND); |
| for (int i = 0; i <= last_index; ++i) { |
| Label next; |
| ElementsKind candidate_kind = GetFastElementsKindFromSequenceIndex(i); |
| // TODO(jbramley): Is this the best way to handle this? Can we make the |
| // tail calls conditional, rather than hopping over each one? |
| __ CompareAndBranch(kind, candidate_kind, ne, &next); |
| T stub(masm->isolate(), candidate_kind); |
| __ TailCallStub(&stub); |
| __ Bind(&next); |
| } |
| |
| // If we reached this point there is a problem. |
| __ Abort(kUnexpectedElementsKindInArrayConstructor); |
| |
| } else { |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| // TODO(jbramley): If this needs to be a special case, make it a proper template |
| // specialization, and not a separate function. |
| static void CreateArrayDispatchOneArgument(MacroAssembler* masm, |
| AllocationSiteOverrideMode mode) { |
| ASM_LOCATION("CreateArrayDispatchOneArgument"); |
| // x0 - argc |
| // x1 - constructor? |
| // x2 - allocation site (if mode != DISABLE_ALLOCATION_SITES) |
| // x3 - kind (if mode != DISABLE_ALLOCATION_SITES) |
| // sp[0] - last argument |
| |
| Register allocation_site = x2; |
| Register kind = x3; |
| |
| Label normal_sequence; |
| if (mode == DONT_OVERRIDE) { |
| STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| STATIC_ASSERT(FAST_ELEMENTS == 2); |
| STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3); |
| STATIC_ASSERT(FAST_DOUBLE_ELEMENTS == 4); |
| STATIC_ASSERT(FAST_HOLEY_DOUBLE_ELEMENTS == 5); |
| |
| // Is the low bit set? If so, the array is holey. |
| __ Tbnz(kind, 0, &normal_sequence); |
| } |
| |
| // Look at the last argument. |
| // TODO(jbramley): What does a 0 argument represent? |
| __ Peek(x10, 0); |
| __ Cbz(x10, &normal_sequence); |
| |
| if (mode == DISABLE_ALLOCATION_SITES) { |
| ElementsKind initial = GetInitialFastElementsKind(); |
| ElementsKind holey_initial = GetHoleyElementsKind(initial); |
| |
| ArraySingleArgumentConstructorStub stub_holey(masm->isolate(), |
| holey_initial, |
| DISABLE_ALLOCATION_SITES); |
| __ TailCallStub(&stub_holey); |
| |
| __ Bind(&normal_sequence); |
| ArraySingleArgumentConstructorStub stub(masm->isolate(), |
| initial, |
| DISABLE_ALLOCATION_SITES); |
| __ TailCallStub(&stub); |
| } else if (mode == DONT_OVERRIDE) { |
| // We are going to create a holey array, but our kind is non-holey. |
| // Fix kind and retry (only if we have an allocation site in the slot). |
| __ Orr(kind, kind, 1); |
| |
| if (FLAG_debug_code) { |
| __ Ldr(x10, FieldMemOperand(allocation_site, 0)); |
| __ JumpIfNotRoot(x10, Heap::kAllocationSiteMapRootIndex, |
| &normal_sequence); |
| __ Assert(eq, kExpectedAllocationSite); |
| } |
| |
| // Save the resulting elements kind in type info. We can't just store 'kind' |
| // in the AllocationSite::transition_info field because elements kind is |
| // restricted to a portion of the field; upper bits need to be left alone. |
| STATIC_ASSERT(AllocationSite::ElementsKindBits::kShift == 0); |
| __ Ldr(x11, FieldMemOperand(allocation_site, |
| AllocationSite::kTransitionInfoOffset)); |
| __ Add(x11, x11, Smi::FromInt(kFastElementsKindPackedToHoley)); |
| __ Str(x11, FieldMemOperand(allocation_site, |
| AllocationSite::kTransitionInfoOffset)); |
| |
| __ Bind(&normal_sequence); |
| int last_index = |
| GetSequenceIndexFromFastElementsKind(TERMINAL_FAST_ELEMENTS_KIND); |
| for (int i = 0; i <= last_index; ++i) { |
| Label next; |
| ElementsKind candidate_kind = GetFastElementsKindFromSequenceIndex(i); |
| __ CompareAndBranch(kind, candidate_kind, ne, &next); |
| ArraySingleArgumentConstructorStub stub(masm->isolate(), candidate_kind); |
| __ TailCallStub(&stub); |
| __ Bind(&next); |
| } |
| |
| // If we reached this point there is a problem. |
| __ Abort(kUnexpectedElementsKindInArrayConstructor); |
| } else { |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| template<class T> |
| static void ArrayConstructorStubAheadOfTimeHelper(Isolate* isolate) { |
| int to_index = GetSequenceIndexFromFastElementsKind( |
| TERMINAL_FAST_ELEMENTS_KIND); |
| for (int i = 0; i <= to_index; ++i) { |
| ElementsKind kind = GetFastElementsKindFromSequenceIndex(i); |
| T stub(isolate, kind); |
| stub.GetCode(); |
| if (AllocationSite::GetMode(kind) != DONT_TRACK_ALLOCATION_SITE) { |
| T stub1(isolate, kind, DISABLE_ALLOCATION_SITES); |
| stub1.GetCode(); |
| } |
| } |
| } |
| |
| |
| void ArrayConstructorStubBase::GenerateStubsAheadOfTime(Isolate* isolate) { |
| ArrayConstructorStubAheadOfTimeHelper<ArrayNoArgumentConstructorStub>( |
| isolate); |
| ArrayConstructorStubAheadOfTimeHelper<ArraySingleArgumentConstructorStub>( |
| isolate); |
| ArrayConstructorStubAheadOfTimeHelper<ArrayNArgumentsConstructorStub>( |
| isolate); |
| } |
| |
| |
| void InternalArrayConstructorStubBase::GenerateStubsAheadOfTime( |
| Isolate* isolate) { |
| ElementsKind kinds[2] = { FAST_ELEMENTS, FAST_HOLEY_ELEMENTS }; |
| for (int i = 0; i < 2; i++) { |
| // For internal arrays we only need a few things |
| InternalArrayNoArgumentConstructorStub stubh1(isolate, kinds[i]); |
| stubh1.GetCode(); |
| InternalArraySingleArgumentConstructorStub stubh2(isolate, kinds[i]); |
| stubh2.GetCode(); |
| InternalArrayNArgumentsConstructorStub stubh3(isolate, kinds[i]); |
| stubh3.GetCode(); |
| } |
| } |
| |
| |
| void ArrayConstructorStub::GenerateDispatchToArrayStub( |
| MacroAssembler* masm, |
| AllocationSiteOverrideMode mode) { |
| Register argc = x0; |
| if (argument_count() == ANY) { |
| Label zero_case, n_case; |
| __ Cbz(argc, &zero_case); |
| __ Cmp(argc, 1); |
| __ B(ne, &n_case); |
| |
| // One argument. |
| CreateArrayDispatchOneArgument(masm, mode); |
| |
| __ Bind(&zero_case); |
| // No arguments. |
| CreateArrayDispatch<ArrayNoArgumentConstructorStub>(masm, mode); |
| |
| __ Bind(&n_case); |
| // N arguments. |
| CreateArrayDispatch<ArrayNArgumentsConstructorStub>(masm, mode); |
| |
| } else if (argument_count() == NONE) { |
| CreateArrayDispatch<ArrayNoArgumentConstructorStub>(masm, mode); |
| } else if (argument_count() == ONE) { |
| CreateArrayDispatchOneArgument(masm, mode); |
| } else if (argument_count() == MORE_THAN_ONE) { |
| CreateArrayDispatch<ArrayNArgumentsConstructorStub>(masm, mode); |
| } else { |
| UNREACHABLE(); |
| } |
| } |
| |
| |
| void ArrayConstructorStub::Generate(MacroAssembler* masm) { |
| ASM_LOCATION("ArrayConstructorStub::Generate"); |
| // ----------- S t a t e ------------- |
| // -- x0 : argc (only if argument_count() is ANY or MORE_THAN_ONE) |
| // -- x1 : constructor |
| // -- x2 : AllocationSite or undefined |
| // -- x3 : new target |
| // -- sp[0] : last argument |
| // ----------------------------------- |
| Register constructor = x1; |
| Register allocation_site = x2; |
| Register new_target = x3; |
| |
| if (FLAG_debug_code) { |
| // The array construct code is only set for the global and natives |
| // builtin Array functions which always have maps. |
| |
| Label unexpected_map, map_ok; |
| // Initial map for the builtin Array function should be a map. |
| __ Ldr(x10, FieldMemOperand(constructor, |
| JSFunction::kPrototypeOrInitialMapOffset)); |
| // Will both indicate a NULL and a Smi. |
| __ JumpIfSmi(x10, &unexpected_map); |
| __ JumpIfObjectType(x10, x10, x11, MAP_TYPE, &map_ok); |
| __ Bind(&unexpected_map); |
| __ Abort(kUnexpectedInitialMapForArrayFunction); |
| __ Bind(&map_ok); |
| |
| // We should either have undefined in the allocation_site register or a |
| // valid AllocationSite. |
| __ AssertUndefinedOrAllocationSite(allocation_site, x10); |
| } |
| |
| // Enter the context of the Array function. |
| __ Ldr(cp, FieldMemOperand(x1, JSFunction::kContextOffset)); |
| |
| Label subclassing; |
| __ Cmp(new_target, constructor); |
| __ B(ne, &subclassing); |
| |
| Register kind = x3; |
| Label no_info; |
| // Get the elements kind and case on that. |
| __ JumpIfRoot(allocation_site, Heap::kUndefinedValueRootIndex, &no_info); |
| |
| __ Ldrsw(kind, |
| UntagSmiFieldMemOperand(allocation_site, |
| AllocationSite::kTransitionInfoOffset)); |
| __ And(kind, kind, AllocationSite::ElementsKindBits::kMask); |
| GenerateDispatchToArrayStub(masm, DONT_OVERRIDE); |
| |
| __ Bind(&no_info); |
| GenerateDispatchToArrayStub(masm, DISABLE_ALLOCATION_SITES); |
| |
| // Subclassing support. |
| __ Bind(&subclassing); |
| switch (argument_count()) { |
| case ANY: |
| case MORE_THAN_ONE: |
| __ Poke(constructor, Operand(x0, LSL, kPointerSizeLog2)); |
| __ Add(x0, x0, Operand(3)); |
| break; |
| case NONE: |
| __ Poke(constructor, 0 * kPointerSize); |
| __ Mov(x0, Operand(3)); |
| break; |
| case ONE: |
| __ Poke(constructor, 1 * kPointerSize); |
| __ Mov(x0, Operand(4)); |
| break; |
| } |
| __ Push(new_target, allocation_site); |
| __ JumpToExternalReference(ExternalReference(Runtime::kNewArray, isolate())); |
| } |
| |
| |
| void InternalArrayConstructorStub::GenerateCase( |
| MacroAssembler* masm, ElementsKind kind) { |
| Label zero_case, n_case; |
| Register argc = x0; |
| |
| __ Cbz(argc, &zero_case); |
| __ CompareAndBranch(argc, 1, ne, &n_case); |
| |
| // One argument. |
| if (IsFastPackedElementsKind(kind)) { |
| Label packed_case; |
| |
| // We might need to create a holey array; look at the first argument. |
| __ Peek(x10, 0); |
| __ Cbz(x10, &packed_case); |
| |
| InternalArraySingleArgumentConstructorStub |
| stub1_holey(isolate(), GetHoleyElementsKind(kind)); |
| __ TailCallStub(&stub1_holey); |
| |
| __ Bind(&packed_case); |
| } |
| InternalArraySingleArgumentConstructorStub stub1(isolate(), kind); |
| __ TailCallStub(&stub1); |
| |
| __ Bind(&zero_case); |
| // No arguments. |
| InternalArrayNoArgumentConstructorStub stub0(isolate(), kind); |
| __ TailCallStub(&stub0); |
| |
| __ Bind(&n_case); |
| // N arguments. |
| InternalArrayNArgumentsConstructorStub stubN(isolate(), kind); |
| __ TailCallStub(&stubN); |
| } |
| |
| |
| void InternalArrayConstructorStub::Generate(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argc |
| // -- x1 : constructor |
| // -- sp[0] : return address |
| // -- sp[4] : last argument |
| // ----------------------------------- |
| |
| Register constructor = x1; |
| |
| if (FLAG_debug_code) { |
| // The array construct code is only set for the global and natives |
| // builtin Array functions which always have maps. |
| |
| Label unexpected_map, map_ok; |
| // Initial map for the builtin Array function should be a map. |
| __ Ldr(x10, FieldMemOperand(constructor, |
| JSFunction::kPrototypeOrInitialMapOffset)); |
| // Will both indicate a NULL and a Smi. |
| __ JumpIfSmi(x10, &unexpected_map); |
| __ JumpIfObjectType(x10, x10, x11, MAP_TYPE, &map_ok); |
| __ Bind(&unexpected_map); |
| __ Abort(kUnexpectedInitialMapForArrayFunction); |
| __ Bind(&map_ok); |
| } |
| |
| Register kind = w3; |
| // Figure out the right elements kind |
| __ Ldr(x10, FieldMemOperand(constructor, |
| JSFunction::kPrototypeOrInitialMapOffset)); |
| |
| // Retrieve elements_kind from map. |
| __ LoadElementsKindFromMap(kind, x10); |
| |
| if (FLAG_debug_code) { |
| Label done; |
| __ Cmp(x3, FAST_ELEMENTS); |
| __ Ccmp(x3, FAST_HOLEY_ELEMENTS, ZFlag, ne); |
| __ Assert(eq, kInvalidElementsKindForInternalArrayOrInternalPackedArray); |
| } |
| |
| Label fast_elements_case; |
| __ CompareAndBranch(kind, FAST_ELEMENTS, eq, &fast_elements_case); |
| GenerateCase(masm, FAST_HOLEY_ELEMENTS); |
| |
| __ Bind(&fast_elements_case); |
| GenerateCase(masm, FAST_ELEMENTS); |
| } |
| |
| |
| void FastNewObjectStub::Generate(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x1 : target |
| // -- x3 : new target |
| // -- cp : context |
| // -- lr : return address |
| // ----------------------------------- |
| __ AssertFunction(x1); |
| __ AssertReceiver(x3); |
| |
| // Verify that the new target is a JSFunction. |
| Label new_object; |
| __ JumpIfNotObjectType(x3, x2, x2, JS_FUNCTION_TYPE, &new_object); |
| |
| // Load the initial map and verify that it's in fact a map. |
| __ Ldr(x2, FieldMemOperand(x3, JSFunction::kPrototypeOrInitialMapOffset)); |
| __ JumpIfSmi(x2, &new_object); |
| __ JumpIfNotObjectType(x2, x0, x0, MAP_TYPE, &new_object); |
| |
| // Fall back to runtime if the target differs from the new target's |
| // initial map constructor. |
| __ Ldr(x0, FieldMemOperand(x2, Map::kConstructorOrBackPointerOffset)); |
| __ CompareAndBranch(x0, x1, ne, &new_object); |
| |
| // Allocate the JSObject on the heap. |
| Label allocate, done_allocate; |
| __ Ldrb(x4, FieldMemOperand(x2, Map::kInstanceSizeOffset)); |
| __ Allocate(x4, x0, x5, x6, &allocate, SIZE_IN_WORDS); |
| __ Bind(&done_allocate); |
| |
| // Initialize the JSObject fields. |
| __ Mov(x1, x0); |
| STATIC_ASSERT(JSObject::kMapOffset == 0 * kPointerSize); |
| __ Str(x2, MemOperand(x1, kPointerSize, PostIndex)); |
| __ LoadRoot(x3, Heap::kEmptyFixedArrayRootIndex); |
| STATIC_ASSERT(JSObject::kPropertiesOffset == 1 * kPointerSize); |
| STATIC_ASSERT(JSObject::kElementsOffset == 2 * kPointerSize); |
| __ Stp(x3, x3, MemOperand(x1, 2 * kPointerSize, PostIndex)); |
| STATIC_ASSERT(JSObject::kHeaderSize == 3 * kPointerSize); |
| |
| // ----------- S t a t e ------------- |
| // -- x0 : result (untagged) |
| // -- x1 : result fields (untagged) |
| // -- x5 : result end (untagged) |
| // -- x2 : initial map |
| // -- cp : context |
| // -- lr : return address |
| // ----------------------------------- |
| |
| // Perform in-object slack tracking if requested. |
| Label slack_tracking; |
| STATIC_ASSERT(Map::kNoSlackTracking == 0); |
| __ LoadRoot(x6, Heap::kUndefinedValueRootIndex); |
| __ Ldr(w3, FieldMemOperand(x2, Map::kBitField3Offset)); |
| __ TestAndBranchIfAnySet(w3, Map::ConstructionCounter::kMask, |
| &slack_tracking); |
| { |
| // Initialize all in-object fields with undefined. |
| __ InitializeFieldsWithFiller(x1, x5, x6); |
| |
| // Add the object tag to make the JSObject real. |
| STATIC_ASSERT(kHeapObjectTag == 1); |
| __ Add(x0, x0, kHeapObjectTag); |
| __ Ret(); |
| } |
| __ Bind(&slack_tracking); |
| { |
| // Decrease generous allocation count. |
| STATIC_ASSERT(Map::ConstructionCounter::kNext == 32); |
| __ Sub(w3, w3, 1 << Map::ConstructionCounter::kShift); |
| __ Str(w3, FieldMemOperand(x2, Map::kBitField3Offset)); |
| |
| // Initialize the in-object fields with undefined. |
| __ Ldrb(x4, FieldMemOperand(x2, Map::kUnusedPropertyFieldsOffset)); |
| __ Sub(x4, x5, Operand(x4, LSL, kPointerSizeLog2)); |
| __ InitializeFieldsWithFiller(x1, x4, x6); |
| |
| // Initialize the remaining (reserved) fields with one pointer filler map. |
| __ LoadRoot(x6, Heap::kOnePointerFillerMapRootIndex); |
| __ InitializeFieldsWithFiller(x1, x5, x6); |
| |
| // Add the object tag to make the JSObject real. |
| STATIC_ASSERT(kHeapObjectTag == 1); |
| __ Add(x0, x0, kHeapObjectTag); |
| |
| // Check if we can finalize the instance size. |
| Label finalize; |
| STATIC_ASSERT(Map::kSlackTrackingCounterEnd == 1); |
| __ TestAndBranchIfAllClear(w3, Map::ConstructionCounter::kMask, &finalize); |
| __ Ret(); |
| |
| // Finalize the instance size. |
| __ Bind(&finalize); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ Push(x0, x2); |
| __ CallRuntime(Runtime::kFinalizeInstanceSize); |
| __ Pop(x0); |
| } |
| __ Ret(); |
| } |
| |
| // Fall back to %AllocateInNewSpace. |
| __ Bind(&allocate); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| STATIC_ASSERT(kSmiTag == 0); |
| STATIC_ASSERT(kSmiTagSize == 1); |
| __ Mov(x4, |
| Operand(x4, LSL, kPointerSizeLog2 + kSmiTagSize + kSmiShiftSize)); |
| __ Push(x2, x4); |
| __ CallRuntime(Runtime::kAllocateInNewSpace); |
| __ Pop(x2); |
| } |
| STATIC_ASSERT(kHeapObjectTag == 1); |
| __ Sub(x0, x0, kHeapObjectTag); |
| __ Ldrb(x5, FieldMemOperand(x2, Map::kInstanceSizeOffset)); |
| __ Add(x5, x0, Operand(x5, LSL, kPointerSizeLog2)); |
| __ B(&done_allocate); |
| |
| // Fall back to %NewObject. |
| __ Bind(&new_object); |
| __ Push(x1, x3); |
| __ TailCallRuntime(Runtime::kNewObject); |
| } |
| |
| |
| void FastNewRestParameterStub::Generate(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x1 : function |
| // -- cp : context |
| // -- fp : frame pointer |
| // -- lr : return address |
| // ----------------------------------- |
| __ AssertFunction(x1); |
| |
| // For Ignition we need to skip all possible handler/stub frames until |
| // we reach the JavaScript frame for the function (similar to what the |
| // runtime fallback implementation does). So make x2 point to that |
| // JavaScript frame. |
| { |
| Label loop, loop_entry; |
| __ Mov(x2, fp); |
| __ B(&loop_entry); |
| __ Bind(&loop); |
| __ Ldr(x2, MemOperand(x2, StandardFrameConstants::kCallerFPOffset)); |
| __ Bind(&loop_entry); |
| __ Ldr(x3, MemOperand(x2, StandardFrameConstants::kMarkerOffset)); |
| __ Cmp(x3, x1); |
| __ B(ne, &loop); |
| } |
| |
| // Check if we have rest parameters (only possible if we have an |
| // arguments adaptor frame below the function frame). |
| Label no_rest_parameters; |
| __ Ldr(x2, MemOperand(x2, StandardFrameConstants::kCallerFPOffset)); |
| __ Ldr(x3, MemOperand(x2, StandardFrameConstants::kContextOffset)); |
| __ Cmp(x3, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)); |
| __ B(ne, &no_rest_parameters); |
| |
| // Check if the arguments adaptor frame contains more arguments than |
| // specified by the function's internal formal parameter count. |
| Label rest_parameters; |
| __ Ldrsw(x0, UntagSmiMemOperand( |
| x2, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| __ Ldr(x1, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldrsw( |
| x1, FieldMemOperand(x1, SharedFunctionInfo::kFormalParameterCountOffset)); |
| __ Subs(x0, x0, x1); |
| __ B(gt, &rest_parameters); |
| |
| // Return an empty rest parameter array. |
| __ Bind(&no_rest_parameters); |
| { |
| // ----------- S t a t e ------------- |
| // -- cp : context |
| // -- lr : return address |
| // ----------------------------------- |
| |
| // Allocate an empty rest parameter array. |
| Label allocate, done_allocate; |
| __ Allocate(JSArray::kSize, x0, x1, x2, &allocate, TAG_OBJECT); |
| __ Bind(&done_allocate); |
| |
| // Setup the rest parameter array in x0. |
| __ LoadNativeContextSlot(Context::JS_ARRAY_FAST_ELEMENTS_MAP_INDEX, x1); |
| __ Str(x1, FieldMemOperand(x0, JSArray::kMapOffset)); |
| __ LoadRoot(x1, Heap::kEmptyFixedArrayRootIndex); |
| __ Str(x1, FieldMemOperand(x0, JSArray::kPropertiesOffset)); |
| __ Str(x1, FieldMemOperand(x0, JSArray::kElementsOffset)); |
| __ Mov(x1, Smi::FromInt(0)); |
| __ Str(x1, FieldMemOperand(x0, JSArray::kLengthOffset)); |
| STATIC_ASSERT(JSArray::kSize == 4 * kPointerSize); |
| __ Ret(); |
| |
| // Fall back to %AllocateInNewSpace. |
| __ Bind(&allocate); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ Push(Smi::FromInt(JSArray::kSize)); |
| __ CallRuntime(Runtime::kAllocateInNewSpace); |
| } |
| __ B(&done_allocate); |
| } |
| |
| __ Bind(&rest_parameters); |
| { |
| // Compute the pointer to the first rest parameter (skippping the receiver). |
| __ Add(x2, x2, Operand(x0, LSL, kPointerSizeLog2)); |
| __ Add(x2, x2, StandardFrameConstants::kCallerSPOffset - 1 * kPointerSize); |
| |
| // ----------- S t a t e ------------- |
| // -- cp : context |
| // -- x0 : number of rest parameters |
| // -- x2 : pointer to first rest parameters |
| // -- lr : return address |
| // ----------------------------------- |
| |
| // Allocate space for the rest parameter array plus the backing store. |
| Label allocate, done_allocate; |
| __ Mov(x1, JSArray::kSize + FixedArray::kHeaderSize); |
| __ Add(x1, x1, Operand(x0, LSL, kPointerSizeLog2)); |
| __ Allocate(x1, x3, x4, x5, &allocate, TAG_OBJECT); |
| __ Bind(&done_allocate); |
| |
| // Compute arguments.length in x6. |
| __ SmiTag(x6, x0); |
| |
| // Setup the elements array in x3. |
| __ LoadRoot(x1, Heap::kFixedArrayMapRootIndex); |
| __ Str(x1, FieldMemOperand(x3, FixedArray::kMapOffset)); |
| __ Str(x6, FieldMemOperand(x3, FixedArray::kLengthOffset)); |
| __ Add(x4, x3, FixedArray::kHeaderSize); |
| { |
| Label loop, done_loop; |
| __ Add(x0, x4, Operand(x0, LSL, kPointerSizeLog2)); |
| __ Bind(&loop); |
| __ Cmp(x4, x0); |
| __ B(eq, &done_loop); |
| __ Ldr(x5, MemOperand(x2, 0 * kPointerSize)); |
| __ Str(x5, FieldMemOperand(x4, 0 * kPointerSize)); |
| __ Sub(x2, x2, Operand(1 * kPointerSize)); |
| __ Add(x4, x4, Operand(1 * kPointerSize)); |
| __ B(&loop); |
| __ Bind(&done_loop); |
| } |
| |
| // Setup the rest parameter array in x0. |
| __ LoadNativeContextSlot(Context::JS_ARRAY_FAST_ELEMENTS_MAP_INDEX, x1); |
| __ Str(x1, FieldMemOperand(x0, JSArray::kMapOffset)); |
| __ LoadRoot(x1, Heap::kEmptyFixedArrayRootIndex); |
| __ Str(x1, FieldMemOperand(x0, JSArray::kPropertiesOffset)); |
| __ Str(x3, FieldMemOperand(x0, JSArray::kElementsOffset)); |
| __ Str(x6, FieldMemOperand(x0, JSArray::kLengthOffset)); |
| STATIC_ASSERT(JSArray::kSize == 4 * kPointerSize); |
| __ Ret(); |
| |
| // Fall back to %AllocateInNewSpace. |
| __ Bind(&allocate); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ SmiTag(x0); |
| __ SmiTag(x1); |
| __ Push(x0, x2, x1); |
| __ CallRuntime(Runtime::kAllocateInNewSpace); |
| __ Mov(x3, x0); |
| __ Pop(x2, x0); |
| __ SmiUntag(x0); |
| } |
| __ B(&done_allocate); |
| } |
| } |
| |
| |
| void FastNewSloppyArgumentsStub::Generate(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x1 : function |
| // -- cp : context |
| // -- fp : frame pointer |
| // -- lr : return address |
| // ----------------------------------- |
| __ AssertFunction(x1); |
| |
| // TODO(bmeurer): Cleanup to match the FastNewStrictArgumentsStub. |
| __ Ldr(x2, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldrsw( |
| x2, FieldMemOperand(x2, SharedFunctionInfo::kFormalParameterCountOffset)); |
| __ Add(x3, fp, Operand(x2, LSL, kPointerSizeLog2)); |
| __ Add(x3, x3, Operand(StandardFrameConstants::kCallerSPOffset)); |
| __ SmiTag(x2); |
| |
| // x1 : function |
| // x2 : number of parameters (tagged) |
| // x3 : parameters pointer |
| // |
| // Returns pointer to result object in x0. |
| |
| // Make an untagged copy of the parameter count. |
| // Note: arg_count_smi is an alias of param_count_smi. |
| Register function = x1; |
| Register arg_count_smi = x2; |
| Register param_count_smi = x2; |
| Register recv_arg = x3; |
| Register param_count = x7; |
| __ SmiUntag(param_count, param_count_smi); |
| |
| // Check if the calling frame is an arguments adaptor frame. |
| Register caller_fp = x11; |
| Register caller_ctx = x12; |
| Label runtime; |
| Label adaptor_frame, try_allocate; |
| __ Ldr(caller_fp, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| __ Ldr(caller_ctx, MemOperand(caller_fp, |
| StandardFrameConstants::kContextOffset)); |
| __ Cmp(caller_ctx, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)); |
| __ B(eq, &adaptor_frame); |
| |
| // No adaptor, parameter count = argument count. |
| |
| // x1 function function pointer |
| // x2 arg_count_smi number of function arguments (smi) |
| // x3 recv_arg pointer to receiver arguments |
| // x4 mapped_params number of mapped params, min(params, args) (uninit) |
| // x7 param_count number of function parameters |
| // x11 caller_fp caller's frame pointer |
| // x14 arg_count number of function arguments (uninit) |
| |
| Register arg_count = x14; |
| Register mapped_params = x4; |
| __ Mov(arg_count, param_count); |
| __ Mov(mapped_params, param_count); |
| __ B(&try_allocate); |
| |
| // We have an adaptor frame. Patch the parameters pointer. |
| __ Bind(&adaptor_frame); |
| __ Ldr(arg_count_smi, |
| MemOperand(caller_fp, |
| ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| __ SmiUntag(arg_count, arg_count_smi); |
| __ Add(x10, caller_fp, Operand(arg_count, LSL, kPointerSizeLog2)); |
| __ Add(recv_arg, x10, StandardFrameConstants::kCallerSPOffset); |
| |
| // Compute the mapped parameter count = min(param_count, arg_count) |
| __ Cmp(param_count, arg_count); |
| __ Csel(mapped_params, param_count, arg_count, lt); |
| |
| __ Bind(&try_allocate); |
| |
| // x0 alloc_obj pointer to allocated objects: param map, backing |
| // store, arguments (uninit) |
| // x1 function function pointer |
| // x2 arg_count_smi number of function arguments (smi) |
| // x3 recv_arg pointer to receiver arguments |
| // x4 mapped_params number of mapped parameters, min(params, args) |
| // x7 param_count number of function parameters |
| // x10 size size of objects to allocate (uninit) |
| // x14 arg_count number of function arguments |
| |
| // Compute the size of backing store, parameter map, and arguments object. |
| // 1. Parameter map, has two extra words containing context and backing |
| // store. |
| const int kParameterMapHeaderSize = |
| FixedArray::kHeaderSize + 2 * kPointerSize; |
| |
| // Calculate the parameter map size, assuming it exists. |
| Register size = x10; |
| __ Mov(size, Operand(mapped_params, LSL, kPointerSizeLog2)); |
| __ Add(size, size, kParameterMapHeaderSize); |
| |
| // If there are no mapped parameters, set the running size total to zero. |
| // Otherwise, use the parameter map size calculated earlier. |
| __ Cmp(mapped_params, 0); |
| __ CzeroX(size, eq); |
| |
| // 2. Add the size of the backing store and arguments object. |
| __ Add(size, size, Operand(arg_count, LSL, kPointerSizeLog2)); |
| __ Add(size, size, FixedArray::kHeaderSize + JSSloppyArgumentsObject::kSize); |
| |
| // Do the allocation of all three objects in one go. Assign this to x0, as it |
| // will be returned to the caller. |
| Register alloc_obj = x0; |
| __ Allocate(size, alloc_obj, x11, x12, &runtime, TAG_OBJECT); |
| |
| // Get the arguments boilerplate from the current (global) context. |
| |
| // x0 alloc_obj pointer to allocated objects (param map, backing |
| // store, arguments) |
| // x1 function function pointer |
| // x2 arg_count_smi number of function arguments (smi) |
| // x3 recv_arg pointer to receiver arguments |
| // x4 mapped_params number of mapped parameters, min(params, args) |
| // x7 param_count number of function parameters |
| // x11 sloppy_args_map offset to args (or aliased args) map (uninit) |
| // x14 arg_count number of function arguments |
| |
| Register global_ctx = x10; |
| Register sloppy_args_map = x11; |
| Register aliased_args_map = x10; |
| __ Ldr(global_ctx, NativeContextMemOperand()); |
| |
| __ Ldr(sloppy_args_map, |
| ContextMemOperand(global_ctx, Context::SLOPPY_ARGUMENTS_MAP_INDEX)); |
| __ Ldr( |
| aliased_args_map, |
| ContextMemOperand(global_ctx, Context::FAST_ALIASED_ARGUMENTS_MAP_INDEX)); |
| __ Cmp(mapped_params, 0); |
| __ CmovX(sloppy_args_map, aliased_args_map, ne); |
| |
| // Copy the JS object part. |
| __ Str(sloppy_args_map, FieldMemOperand(alloc_obj, JSObject::kMapOffset)); |
| __ LoadRoot(x10, Heap::kEmptyFixedArrayRootIndex); |
| __ Str(x10, FieldMemOperand(alloc_obj, JSObject::kPropertiesOffset)); |
| __ Str(x10, FieldMemOperand(alloc_obj, JSObject::kElementsOffset)); |
| |
| // Set up the callee in-object property. |
| __ AssertNotSmi(function); |
| __ Str(function, |
| FieldMemOperand(alloc_obj, JSSloppyArgumentsObject::kCalleeOffset)); |
| |
| // Use the length and set that as an in-object property. |
| __ Str(arg_count_smi, |
| FieldMemOperand(alloc_obj, JSSloppyArgumentsObject::kLengthOffset)); |
| |
| // Set up the elements pointer in the allocated arguments object. |
| // If we allocated a parameter map, "elements" will point there, otherwise |
| // it will point to the backing store. |
| |
| // x0 alloc_obj pointer to allocated objects (param map, backing |
| // store, arguments) |
| // x1 function function pointer |
| // x2 arg_count_smi number of function arguments (smi) |
| // x3 recv_arg pointer to receiver arguments |
| // x4 mapped_params number of mapped parameters, min(params, args) |
| // x5 elements pointer to parameter map or backing store (uninit) |
| // x6 backing_store pointer to backing store (uninit) |
| // x7 param_count number of function parameters |
| // x14 arg_count number of function arguments |
| |
| Register elements = x5; |
| __ Add(elements, alloc_obj, JSSloppyArgumentsObject::kSize); |
| __ Str(elements, FieldMemOperand(alloc_obj, JSObject::kElementsOffset)); |
| |
| // Initialize parameter map. If there are no mapped arguments, we're done. |
| Label skip_parameter_map; |
| __ Cmp(mapped_params, 0); |
| // Set up backing store address, because it is needed later for filling in |
| // the unmapped arguments. |
| Register backing_store = x6; |
| __ CmovX(backing_store, elements, eq); |
| __ B(eq, &skip_parameter_map); |
| |
| __ LoadRoot(x10, Heap::kSloppyArgumentsElementsMapRootIndex); |
| __ Str(x10, FieldMemOperand(elements, FixedArray::kMapOffset)); |
| __ Add(x10, mapped_params, 2); |
| __ SmiTag(x10); |
| __ Str(x10, FieldMemOperand(elements, FixedArray::kLengthOffset)); |
| __ Str(cp, FieldMemOperand(elements, |
| FixedArray::kHeaderSize + 0 * kPointerSize)); |
| __ Add(x10, elements, Operand(mapped_params, LSL, kPointerSizeLog2)); |
| __ Add(x10, x10, kParameterMapHeaderSize); |
| __ Str(x10, FieldMemOperand(elements, |
| FixedArray::kHeaderSize + 1 * kPointerSize)); |
| |
| // Copy the parameter slots and the holes in the arguments. |
| // We need to fill in mapped_parameter_count slots. Then index the context, |
| // where parameters are stored in reverse order, at: |
| // |
| // MIN_CONTEXT_SLOTS .. MIN_CONTEXT_SLOTS + parameter_count - 1 |
| // |
| // The mapped parameter thus needs to get indices: |
| // |
| // MIN_CONTEXT_SLOTS + parameter_count - 1 .. |
| // MIN_CONTEXT_SLOTS + parameter_count - mapped_parameter_count |
| // |
| // We loop from right to left. |
| |
| // x0 alloc_obj pointer to allocated objects (param map, backing |
| // store, arguments) |
| // x1 function function pointer |
| // x2 arg_count_smi number of function arguments (smi) |
| // x3 recv_arg pointer to receiver arguments |
| // x4 mapped_params number of mapped parameters, min(params, args) |
| // x5 elements pointer to parameter map or backing store (uninit) |
| // x6 backing_store pointer to backing store (uninit) |
| // x7 param_count number of function parameters |
| // x11 loop_count parameter loop counter (uninit) |
| // x12 index parameter index (smi, uninit) |
| // x13 the_hole hole value (uninit) |
| // x14 arg_count number of function arguments |
| |
| Register loop_count = x11; |
| Register index = x12; |
| Register the_hole = x13; |
| Label parameters_loop, parameters_test; |
| __ Mov(loop_count, mapped_params); |
| __ Add(index, param_count, static_cast<int>(Context::MIN_CONTEXT_SLOTS)); |
| __ Sub(index, index, mapped_params); |
| __ SmiTag(index); |
| __ LoadRoot(the_hole, Heap::kTheHoleValueRootIndex); |
| __ Add(backing_store, elements, Operand(loop_count, LSL, kPointerSizeLog2)); |
| __ Add(backing_store, backing_store, kParameterMapHeaderSize); |
| |
| __ B(¶meters_test); |
| |
| __ Bind(¶meters_loop); |
| __ Sub(loop_count, loop_count, 1); |
| __ Mov(x10, Operand(loop_count, LSL, kPointerSizeLog2)); |
| __ Add(x10, x10, kParameterMapHeaderSize - kHeapObjectTag); |
| __ Str(index, MemOperand(elements, x10)); |
| __ Sub(x10, x10, kParameterMapHeaderSize - FixedArray::kHeaderSize); |
| __ Str(the_hole, MemOperand(backing_store, x10)); |
| __ Add(index, index, Smi::FromInt(1)); |
| __ Bind(¶meters_test); |
| __ Cbnz(loop_count, ¶meters_loop); |
| |
| __ Bind(&skip_parameter_map); |
| // Copy arguments header and remaining slots (if there are any.) |
| __ LoadRoot(x10, Heap::kFixedArrayMapRootIndex); |
| __ Str(x10, FieldMemOperand(backing_store, FixedArray::kMapOffset)); |
| __ Str(arg_count_smi, FieldMemOperand(backing_store, |
| FixedArray::kLengthOffset)); |
| |
| // x0 alloc_obj pointer to allocated objects (param map, backing |
| // store, arguments) |
| // x1 function function pointer |
| // x2 arg_count_smi number of function arguments (smi) |
| // x3 recv_arg pointer to receiver arguments |
| // x4 mapped_params number of mapped parameters, min(params, args) |
| // x6 backing_store pointer to backing store (uninit) |
| // x14 arg_count number of function arguments |
| |
| Label arguments_loop, arguments_test; |
| __ Mov(x10, mapped_params); |
| __ Sub(recv_arg, recv_arg, Operand(x10, LSL, kPointerSizeLog2)); |
| __ B(&arguments_test); |
| |
| __ Bind(&arguments_loop); |
| __ Sub(recv_arg, recv_arg, kPointerSize); |
| __ Ldr(x11, MemOperand(recv_arg)); |
| __ Add(x12, backing_store, Operand(x10, LSL, kPointerSizeLog2)); |
| __ Str(x11, FieldMemOperand(x12, FixedArray::kHeaderSize)); |
| __ Add(x10, x10, 1); |
| |
| __ Bind(&arguments_test); |
| __ Cmp(x10, arg_count); |
| __ B(lt, &arguments_loop); |
| |
| __ Ret(); |
| |
| // Do the runtime call to allocate the arguments object. |
| __ Bind(&runtime); |
| __ Push(function, recv_arg, arg_count_smi); |
| __ TailCallRuntime(Runtime::kNewSloppyArguments); |
| } |
| |
| |
| void FastNewStrictArgumentsStub::Generate(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x1 : function |
| // -- cp : context |
| // -- fp : frame pointer |
| // -- lr : return address |
| // ----------------------------------- |
| __ AssertFunction(x1); |
| |
| // For Ignition we need to skip all possible handler/stub frames until |
| // we reach the JavaScript frame for the function (similar to what the |
| // runtime fallback implementation does). So make x2 point to that |
| // JavaScript frame. |
| { |
| Label loop, loop_entry; |
| __ Mov(x2, fp); |
| __ B(&loop_entry); |
| __ Bind(&loop); |
| __ Ldr(x2, MemOperand(x2, StandardFrameConstants::kCallerFPOffset)); |
| __ Bind(&loop_entry); |
| __ Ldr(x3, MemOperand(x2, StandardFrameConstants::kMarkerOffset)); |
| __ Cmp(x3, x1); |
| __ B(ne, &loop); |
| } |
| |
| // Check if we have an arguments adaptor frame below the function frame. |
| Label arguments_adaptor, arguments_done; |
| __ Ldr(x3, MemOperand(x2, StandardFrameConstants::kCallerFPOffset)); |
| __ Ldr(x4, MemOperand(x3, StandardFrameConstants::kContextOffset)); |
| __ Cmp(x4, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)); |
| __ B(eq, &arguments_adaptor); |
| { |
| __ Ldr(x1, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldrsw(x0, FieldMemOperand( |
| x1, SharedFunctionInfo::kFormalParameterCountOffset)); |
| __ Add(x2, x2, Operand(x0, LSL, kPointerSizeLog2)); |
| __ Add(x2, x2, StandardFrameConstants::kCallerSPOffset - 1 * kPointerSize); |
| } |
| __ B(&arguments_done); |
| __ Bind(&arguments_adaptor); |
| { |
| __ Ldrsw(x0, UntagSmiMemOperand( |
| x3, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| __ Add(x2, x3, Operand(x0, LSL, kPointerSizeLog2)); |
| __ Add(x2, x2, StandardFrameConstants::kCallerSPOffset - 1 * kPointerSize); |
| } |
| __ Bind(&arguments_done); |
| |
| // ----------- S t a t e ------------- |
| // -- cp : context |
| // -- x0 : number of rest parameters |
| // -- x2 : pointer to first rest parameters |
| // -- lr : return address |
| // ----------------------------------- |
| |
| // Allocate space for the strict arguments object plus the backing store. |
| Label allocate, done_allocate; |
| __ Mov(x1, JSStrictArgumentsObject::kSize + FixedArray::kHeaderSize); |
| __ Add(x1, x1, Operand(x0, LSL, kPointerSizeLog2)); |
| __ Allocate(x1, x3, x4, x5, &allocate, TAG_OBJECT); |
| __ Bind(&done_allocate); |
| |
| // Compute arguments.length in x6. |
| __ SmiTag(x6, x0); |
| |
| // Setup the elements array in x3. |
| __ LoadRoot(x1, Heap::kFixedArrayMapRootIndex); |
| __ Str(x1, FieldMemOperand(x3, FixedArray::kMapOffset)); |
| __ Str(x6, FieldMemOperand(x3, FixedArray::kLengthOffset)); |
| __ Add(x4, x3, FixedArray::kHeaderSize); |
| { |
| Label loop, done_loop; |
| __ Add(x0, x4, Operand(x0, LSL, kPointerSizeLog2)); |
| __ Bind(&loop); |
| __ Cmp(x4, x0); |
| __ B(eq, &done_loop); |
| __ Ldr(x5, MemOperand(x2, 0 * kPointerSize)); |
| __ Str(x5, FieldMemOperand(x4, 0 * kPointerSize)); |
| __ Sub(x2, x2, Operand(1 * kPointerSize)); |
| __ Add(x4, x4, Operand(1 * kPointerSize)); |
| __ B(&loop); |
| __ Bind(&done_loop); |
| } |
| |
| // Setup the strict arguments object in x0. |
| __ LoadNativeContextSlot(Context::STRICT_ARGUMENTS_MAP_INDEX, x1); |
| __ Str(x1, FieldMemOperand(x0, JSStrictArgumentsObject::kMapOffset)); |
| __ LoadRoot(x1, Heap::kEmptyFixedArrayRootIndex); |
| __ Str(x1, FieldMemOperand(x0, JSStrictArgumentsObject::kPropertiesOffset)); |
| __ Str(x3, FieldMemOperand(x0, JSStrictArgumentsObject::kElementsOffset)); |
| __ Str(x6, FieldMemOperand(x0, JSStrictArgumentsObject::kLengthOffset)); |
| STATIC_ASSERT(JSStrictArgumentsObject::kSize == 4 * kPointerSize); |
| __ Ret(); |
| |
| // Fall back to %AllocateInNewSpace. |
| __ Bind(&allocate); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ SmiTag(x0); |
| __ SmiTag(x1); |
| __ Push(x0, x2, x1); |
| __ CallRuntime(Runtime::kAllocateInNewSpace); |
| __ Mov(x3, x0); |
| __ Pop(x2, x0); |
| __ SmiUntag(x0); |
| } |
| __ B(&done_allocate); |
| } |
| |
| |
| void LoadGlobalViaContextStub::Generate(MacroAssembler* masm) { |
| Register context = cp; |
| Register result = x0; |
| Register slot = x2; |
| Label slow_case; |
| |
| // Go up the context chain to the script context. |
| for (int i = 0; i < depth(); ++i) { |
| __ Ldr(result, ContextMemOperand(context, Context::PREVIOUS_INDEX)); |
| context = result; |
| } |
| |
| // Load the PropertyCell value at the specified slot. |
| __ Add(result, context, Operand(slot, LSL, kPointerSizeLog2)); |
| __ Ldr(result, ContextMemOperand(result)); |
| __ Ldr(result, FieldMemOperand(result, PropertyCell::kValueOffset)); |
| |
| // If the result is not the_hole, return. Otherwise, handle in the runtime. |
| __ JumpIfRoot(result, Heap::kTheHoleValueRootIndex, &slow_case); |
| __ Ret(); |
| |
| // Fallback to runtime. |
| __ Bind(&slow_case); |
| __ SmiTag(slot); |
| __ Push(slot); |
| __ TailCallRuntime(Runtime::kLoadGlobalViaContext); |
| } |
| |
| |
| void StoreGlobalViaContextStub::Generate(MacroAssembler* masm) { |
| Register context = cp; |
| Register value = x0; |
| Register slot = x2; |
| Register context_temp = x10; |
| Register cell = x10; |
| Register cell_details = x11; |
| Register cell_value = x12; |
| Register cell_value_map = x13; |
| Register value_map = x14; |
| Label fast_heapobject_case, fast_smi_case, slow_case; |
| |
| if (FLAG_debug_code) { |
| __ CompareRoot(value, Heap::kTheHoleValueRootIndex); |
| __ Check(ne, kUnexpectedValue); |
| } |
| |
| // Go up the context chain to the script context. |
| for (int i = 0; i < depth(); i++) { |
| __ Ldr(context_temp, ContextMemOperand(context, Context::PREVIOUS_INDEX)); |
| context = context_temp; |
| } |
| |
| // Load the PropertyCell at the specified slot. |
| __ Add(cell, context, Operand(slot, LSL, kPointerSizeLog2)); |
| __ Ldr(cell, ContextMemOperand(cell)); |
| |
| // Load PropertyDetails for the cell (actually only the cell_type and kind). |
| __ Ldr(cell_details, |
| UntagSmiFieldMemOperand(cell, PropertyCell::kDetailsOffset)); |
| __ And(cell_details, cell_details, |
| PropertyDetails::PropertyCellTypeField::kMask | |
| PropertyDetails::KindField::kMask | |
| PropertyDetails::kAttributesReadOnlyMask); |
| |
| // Check if PropertyCell holds mutable data. |
| Label not_mutable_data; |
| __ Cmp(cell_details, PropertyDetails::PropertyCellTypeField::encode( |
| PropertyCellType::kMutable) | |
| PropertyDetails::KindField::encode(kData)); |
| __ B(ne, ¬_mutable_data); |
| __ JumpIfSmi(value, &fast_smi_case); |
| __ Bind(&fast_heapobject_case); |
| __ Str(value, FieldMemOperand(cell, PropertyCell::kValueOffset)); |
| // RecordWriteField clobbers the value register, so we copy it before the |
| // call. |
| __ Mov(x11, value); |
| __ RecordWriteField(cell, PropertyCell::kValueOffset, x11, x12, |
| kLRHasNotBeenSaved, kDontSaveFPRegs, EMIT_REMEMBERED_SET, |
| OMIT_SMI_CHECK); |
| __ Ret(); |
| |
| __ Bind(¬_mutable_data); |
| // Check if PropertyCell value matches the new value (relevant for Constant, |
| // ConstantType and Undefined cells). |
| Label not_same_value; |
| __ Ldr(cell_value, FieldMemOperand(cell, PropertyCell::kValueOffset)); |
| __ Cmp(cell_value, value); |
| __ B(ne, ¬_same_value); |
| |
| // Make sure the PropertyCell is not marked READ_ONLY. |
| __ Tst(cell_details, PropertyDetails::kAttributesReadOnlyMask); |
| __ B(ne, &slow_case); |
| |
| if (FLAG_debug_code) { |
| Label done; |
| // This can only be true for Constant, ConstantType and Undefined cells, |
| // because we never store the_hole via this stub. |
| __ Cmp(cell_details, PropertyDetails::PropertyCellTypeField::encode( |
| PropertyCellType::kConstant) | |
| PropertyDetails::KindField::encode(kData)); |
| __ B(eq, &done); |
| __ Cmp(cell_details, PropertyDetails::PropertyCellTypeField::encode( |
| PropertyCellType::kConstantType) | |
| PropertyDetails::KindField::encode(kData)); |
| __ B(eq, &done); |
| __ Cmp(cell_details, PropertyDetails::PropertyCellTypeField::encode( |
| PropertyCellType::kUndefined) | |
| PropertyDetails::KindField::encode(kData)); |
| __ Check(eq, kUnexpectedValue); |
| __ Bind(&done); |
| } |
| __ Ret(); |
| __ Bind(¬_same_value); |
| |
| // Check if PropertyCell contains data with constant type (and is not |
| // READ_ONLY). |
| __ Cmp(cell_details, PropertyDetails::PropertyCellTypeField::encode( |
| PropertyCellType::kConstantType) | |
| PropertyDetails::KindField::encode(kData)); |
| __ B(ne, &slow_case); |
| |
| // Now either both old and new values must be smis or both must be heap |
| // objects with same map. |
| Label value_is_heap_object; |
| __ JumpIfNotSmi(value, &value_is_heap_object); |
| __ JumpIfNotSmi(cell_value, &slow_case); |
| // Old and new values are smis, no need for a write barrier here. |
| __ Bind(&fast_smi_case); |
| __ Str(value, FieldMemOperand(cell, PropertyCell::kValueOffset)); |
| __ Ret(); |
| |
| __ Bind(&value_is_heap_object); |
| __ JumpIfSmi(cell_value, &slow_case); |
| |
| __ Ldr(cell_value_map, FieldMemOperand(cell_value, HeapObject::kMapOffset)); |
| __ Ldr(value_map, FieldMemOperand(value, HeapObject::kMapOffset)); |
| __ Cmp(cell_value_map, value_map); |
| __ B(eq, &fast_heapobject_case); |
| |
| // Fall back to the runtime. |
| __ Bind(&slow_case); |
| __ SmiTag(slot); |
| __ Push(slot, value); |
| __ TailCallRuntime(is_strict(language_mode()) |
| ? Runtime::kStoreGlobalViaContext_Strict |
| : Runtime::kStoreGlobalViaContext_Sloppy); |
| } |
| |
| |
| // The number of register that CallApiFunctionAndReturn will need to save on |
| // the stack. The space for these registers need to be allocated in the |
| // ExitFrame before calling CallApiFunctionAndReturn. |
| static const int kCallApiFunctionSpillSpace = 4; |
| |
| |
| static int AddressOffset(ExternalReference ref0, ExternalReference ref1) { |
| return static_cast<int>(ref0.address() - ref1.address()); |
| } |
| |
| |
| // Calls an API function. Allocates HandleScope, extracts returned value |
| // from handle and propagates exceptions. |
| // 'stack_space' is the space to be unwound on exit (includes the call JS |
| // arguments space and the additional space allocated for the fast call). |
| // 'spill_offset' is the offset from the stack pointer where |
| // CallApiFunctionAndReturn can spill registers. |
| static void CallApiFunctionAndReturn( |
| MacroAssembler* masm, Register function_address, |
| ExternalReference thunk_ref, int stack_space, |
| MemOperand* stack_space_operand, int spill_offset, |
| MemOperand return_value_operand, MemOperand* context_restore_operand) { |
| ASM_LOCATION("CallApiFunctionAndReturn"); |
| Isolate* isolate = masm->isolate(); |
| 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(x1) || function_address.is(x2)); |
| |
| Label profiler_disabled; |
| Label end_profiler_check; |
| __ Mov(x10, ExternalReference::is_profiling_address(isolate)); |
| __ Ldrb(w10, MemOperand(x10)); |
| __ Cbz(w10, &profiler_disabled); |
| __ Mov(x3, thunk_ref); |
| __ B(&end_profiler_check); |
| |
| __ Bind(&profiler_disabled); |
| __ Mov(x3, function_address); |
| __ Bind(&end_profiler_check); |
| |
| // Save the callee-save registers we are going to use. |
| // TODO(all): Is this necessary? ARM doesn't do it. |
| STATIC_ASSERT(kCallApiFunctionSpillSpace == 4); |
| __ Poke(x19, (spill_offset + 0) * kXRegSize); |
| __ Poke(x20, (spill_offset + 1) * kXRegSize); |
| __ Poke(x21, (spill_offset + 2) * kXRegSize); |
| __ Poke(x22, (spill_offset + 3) * kXRegSize); |
| |
| // Allocate HandleScope in callee-save registers. |
| // We will need to restore the HandleScope after the call to the API function, |
| // by allocating it in callee-save registers they will be preserved by C code. |
| Register handle_scope_base = x22; |
| Register next_address_reg = x19; |
| Register limit_reg = x20; |
| Register level_reg = w21; |
| |
| __ Mov(handle_scope_base, next_address); |
| __ Ldr(next_address_reg, MemOperand(handle_scope_base, kNextOffset)); |
| __ Ldr(limit_reg, MemOperand(handle_scope_base, kLimitOffset)); |
| __ Ldr(level_reg, MemOperand(handle_scope_base, kLevelOffset)); |
| __ Add(level_reg, level_reg, 1); |
| __ Str(level_reg, MemOperand(handle_scope_base, kLevelOffset)); |
| |
| if (FLAG_log_timer_events) { |
| FrameScope frame(masm, StackFrame::MANUAL); |
| __ PushSafepointRegisters(); |
| __ Mov(x0, 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(masm, x3); |
| |
| if (FLAG_log_timer_events) { |
| FrameScope frame(masm, StackFrame::MANUAL); |
| __ PushSafepointRegisters(); |
| __ Mov(x0, ExternalReference::isolate_address(isolate)); |
| __ CallCFunction(ExternalReference::log_leave_external_function(isolate), |
| 1); |
| __ PopSafepointRegisters(); |
| } |
| |
| Label promote_scheduled_exception; |
| Label delete_allocated_handles; |
| Label leave_exit_frame; |
| Label return_value_loaded; |
| |
| // Load value from ReturnValue. |
| __ Ldr(x0, return_value_operand); |
| __ Bind(&return_value_loaded); |
| // No more valid handles (the result handle was the last one). Restore |
| // previous handle scope. |
| __ Str(next_address_reg, MemOperand(handle_scope_base, kNextOffset)); |
| if (__ emit_debug_code()) { |
| __ Ldr(w1, MemOperand(handle_scope_base, kLevelOffset)); |
| __ Cmp(w1, level_reg); |
| __ Check(eq, kUnexpectedLevelAfterReturnFromApiCall); |
| } |
| __ Sub(level_reg, level_reg, 1); |
| __ Str(level_reg, MemOperand(handle_scope_base, kLevelOffset)); |
| __ Ldr(x1, MemOperand(handle_scope_base, kLimitOffset)); |
| __ Cmp(limit_reg, x1); |
| __ B(ne, &delete_allocated_handles); |
| |
| // Leave the API exit frame. |
| __ Bind(&leave_exit_frame); |
| // Restore callee-saved registers. |
| __ Peek(x19, (spill_offset + 0) * kXRegSize); |
| __ Peek(x20, (spill_offset + 1) * kXRegSize); |
| __ Peek(x21, (spill_offset + 2) * kXRegSize); |
| __ Peek(x22, (spill_offset + 3) * kXRegSize); |
| |
| bool restore_context = context_restore_operand != NULL; |
| if (restore_context) { |
| __ Ldr(cp, *context_restore_operand); |
| } |
| |
| if (stack_space_operand != NULL) { |
| __ Ldr(w2, *stack_space_operand); |
| } |
| |
| __ LeaveExitFrame(false, x1, !restore_context); |
| |
| // Check if the function scheduled an exception. |
| __ Mov(x5, ExternalReference::scheduled_exception_address(isolate)); |
| __ Ldr(x5, MemOperand(x5)); |
| __ JumpIfNotRoot(x5, Heap::kTheHoleValueRootIndex, |
| &promote_scheduled_exception); |
| |
| if (stack_space_operand != NULL) { |
| __ Drop(x2, 1); |
| } else { |
| __ Drop(stack_space); |
| } |
| __ Ret(); |
| |
| // Re-throw by promoting a scheduled exception. |
| __ Bind(&promote_scheduled_exception); |
| __ TailCallRuntime(Runtime::kPromoteScheduledException); |
| |
| // HandleScope limit has changed. Delete allocated extensions. |
| __ Bind(&delete_allocated_handles); |
| __ Str(limit_reg, MemOperand(handle_scope_base, kLimitOffset)); |
| // Save the return value in a callee-save register. |
| Register saved_result = x19; |
| __ Mov(saved_result, x0); |
| __ Mov(x0, ExternalReference::isolate_address(isolate)); |
| __ CallCFunction(ExternalReference::delete_handle_scope_extensions(isolate), |
| 1); |
| __ Mov(x0, saved_result); |
| __ B(&leave_exit_frame); |
| } |
| |
| static void CallApiFunctionStubHelper(MacroAssembler* masm, |
| const ParameterCount& argc, |
| bool return_first_arg, |
| bool call_data_undefined, bool is_lazy) { |
| // ----------- S t a t e ------------- |
| // -- x0 : callee |
| // -- x4 : call_data |
| // -- x2 : holder |
| // -- x1 : api_function_address |
| // -- x3 : number of arguments if argc is a register |
| // -- cp : context |
| // -- |
| // -- sp[0] : last argument |
| // -- ... |
| // -- sp[(argc - 1) * 8] : first argument |
| // -- sp[argc * 8] : receiver |
| // ----------------------------------- |
| |
| Register callee = x0; |
| Register call_data = x4; |
| Register holder = x2; |
| Register api_function_address = x1; |
| Register context = cp; |
| |
| typedef FunctionCallbackArguments FCA; |
| |
| STATIC_ASSERT(FCA::kContextSaveIndex == 6); |
| STATIC_ASSERT(FCA::kCalleeIndex == 5); |
| STATIC_ASSERT(FCA::kDataIndex == 4); |
| STATIC_ASSERT(FCA::kReturnValueOffset == 3); |
| STATIC_ASSERT(FCA::kReturnValueDefaultValueIndex == 2); |
| STATIC_ASSERT(FCA::kIsolateIndex == 1); |
| STATIC_ASSERT(FCA::kHolderIndex == 0); |
| STATIC_ASSERT(FCA::kArgsLength == 7); |
| |
| DCHECK(argc.is_immediate() || x3.is(argc.reg())); |
| |
| // FunctionCallbackArguments: context, callee and call data. |
| __ Push(context, callee, call_data); |
| |
| if (!is_lazy) { |
| // Load context from callee |
| __ Ldr(context, FieldMemOperand(callee, JSFunction::kContextOffset)); |
| } |
| |
| if (!call_data_undefined) { |
| __ LoadRoot(call_data, Heap::kUndefinedValueRootIndex); |
| } |
| Register isolate_reg = x5; |
| __ Mov(isolate_reg, ExternalReference::isolate_address(masm->isolate())); |
| |
| // FunctionCallbackArguments: |
| // return value, return value default, isolate, holder. |
| __ Push(call_data, call_data, isolate_reg, holder); |
| |
| // Prepare arguments. |
| Register args = x6; |
| __ Mov(args, masm->StackPointer()); |
| |
| // Allocate the v8::Arguments structure in the arguments' space, since it's |
| // not controlled by GC. |
| const int kApiStackSpace = 4; |
| |
| // Allocate space for CallApiFunctionAndReturn can store some scratch |
| // registeres on the stack. |
| const int kCallApiFunctionSpillSpace = 4; |
| |
| FrameScope frame_scope(masm, StackFrame::MANUAL); |
| __ EnterExitFrame(false, x10, kApiStackSpace + kCallApiFunctionSpillSpace); |
| |
| DCHECK(!AreAliased(x0, api_function_address)); |
| // x0 = FunctionCallbackInfo& |
| // Arguments is after the return address. |
| __ Add(x0, masm->StackPointer(), 1 * kPointerSize); |
| if (argc.is_immediate()) { |
| // FunctionCallbackInfo::implicit_args_ and FunctionCallbackInfo::values_ |
| __ Add(x10, args, |
| Operand((FCA::kArgsLength - 1 + argc.immediate()) * kPointerSize)); |
| __ Stp(args, x10, MemOperand(x0, 0 * kPointerSize)); |
| // FunctionCallbackInfo::length_ = argc and |
| // FunctionCallbackInfo::is_construct_call = 0 |
| __ Mov(x10, argc.immediate()); |
| __ Stp(x10, xzr, MemOperand(x0, 2 * kPointerSize)); |
| } else { |
| // FunctionCallbackInfo::implicit_args_ and FunctionCallbackInfo::values_ |
| __ Add(x10, args, Operand(argc.reg(), LSL, kPointerSizeLog2)); |
| __ Add(x10, x10, (FCA::kArgsLength - 1) * kPointerSize); |
| __ Stp(args, x10, MemOperand(x0, 0 * kPointerSize)); |
| // FunctionCallbackInfo::length_ = argc and |
| // FunctionCallbackInfo::is_construct_call |
| __ Add(x10, argc.reg(), FCA::kArgsLength + 1); |
| __ Mov(x10, Operand(x10, LSL, kPointerSizeLog2)); |
| __ Stp(argc.reg(), x10, MemOperand(x0, 2 * kPointerSize)); |
| } |
| |
| ExternalReference thunk_ref = |
| ExternalReference::invoke_function_callback(masm->isolate()); |
| |
| AllowExternalCallThatCantCauseGC scope(masm); |
| MemOperand context_restore_operand( |
| fp, (2 + FCA::kContextSaveIndex) * kPointerSize); |
| // Stores return the first js argument |
| int return_value_offset = 0; |
| if (return_first_arg) { |
| return_value_offset = 2 + FCA::kArgsLength; |
| } else { |
| return_value_offset = 2 + FCA::kReturnValueOffset; |
| } |
| MemOperand return_value_operand(fp, return_value_offset * kPointerSize); |
| int stack_space = 0; |
| MemOperand is_construct_call_operand = |
| MemOperand(masm->StackPointer(), 4 * kPointerSize); |
| MemOperand* stack_space_operand = &is_construct_call_operand; |
| if (argc.is_immediate()) { |
| stack_space = argc.immediate() + FCA::kArgsLength + 1; |
| stack_space_operand = NULL; |
| } |
| |
| const int spill_offset = 1 + kApiStackSpace; |
| CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, stack_space, |
| stack_space_operand, spill_offset, |
| return_value_operand, &context_restore_operand); |
| } |
| |
| |
| void CallApiFunctionStub::Generate(MacroAssembler* masm) { |
| bool call_data_undefined = this->call_data_undefined(); |
| CallApiFunctionStubHelper(masm, ParameterCount(x3), false, |
| call_data_undefined, false); |
| } |
| |
| |
| void CallApiAccessorStub::Generate(MacroAssembler* masm) { |
| bool is_store = this->is_store(); |
| int argc = this->argc(); |
| bool call_data_undefined = this->call_data_undefined(); |
| bool is_lazy = this->is_lazy(); |
| CallApiFunctionStubHelper(masm, ParameterCount(argc), is_store, |
| call_data_undefined, is_lazy); |
| } |
| |
| |
| void CallApiGetterStub::Generate(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- sp[0] : name |
| // -- sp[8 .. (8 + kArgsLength*8)] : v8::PropertyCallbackInfo::args_ |
| // -- ... |
| // -- x2 : api_function_address |
| // ----------------------------------- |
| |
| Register api_function_address = ApiGetterDescriptor::function_address(); |
| DCHECK(api_function_address.is(x2)); |
| |
| // v8::PropertyCallbackInfo::args_ array and name handle. |
| const int kStackUnwindSpace = PropertyCallbackArguments::kArgsLength + 1; |
| |
| // Load address of v8::PropertyAccessorInfo::args_ array and name handle. |
| __ Mov(x0, masm->StackPointer()); // x0 = Handle<Name> |
| __ Add(x1, x0, 1 * kPointerSize); // x1 = v8::PCI::args_ |
| |
| const int kApiStackSpace = 1; |
| |
| // Allocate space for CallApiFunctionAndReturn can store some scratch |
| // registeres on the stack. |
| const int kCallApiFunctionSpillSpace = 4; |
| |
| FrameScope frame_scope(masm, StackFrame::MANUAL); |
| __ EnterExitFrame(false, x10, kApiStackSpace + kCallApiFunctionSpillSpace); |
| |
| // Create v8::PropertyCallbackInfo object on the stack and initialize |
| // it's args_ field. |
| __ Poke(x1, 1 * kPointerSize); |
| __ Add(x1, masm->StackPointer(), 1 * kPointerSize); |
| // x1 = v8::PropertyCallbackInfo& |
| |
| ExternalReference thunk_ref = |
| ExternalReference::invoke_accessor_getter_callback(isolate()); |
| |
| const int spill_offset = 1 + kApiStackSpace; |
| // +3 is to skip prolog, return address and name handle. |
| MemOperand return_value_operand( |
| fp, (PropertyCallbackArguments::kReturnValueOffset + 3) * kPointerSize); |
| CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, |
| kStackUnwindSpace, NULL, spill_offset, |
| return_value_operand, NULL); |
| } |
| |
| |
| #undef __ |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_TARGET_ARCH_ARM64 |