| // 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/arm64/frames-arm64.h" |
| #include "src/codegen.h" |
| #include "src/debug/debug.h" |
| #include "src/deoptimizer.h" |
| #include "src/full-codegen/full-codegen.h" |
| #include "src/runtime/runtime.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| #define __ ACCESS_MASM(masm) |
| |
| // Load the built-in Array function from the current context. |
| static void GenerateLoadArrayFunction(MacroAssembler* masm, Register result) { |
| // Load the InternalArray function from the native context. |
| __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, result); |
| } |
| |
| // Load the built-in InternalArray function from the current context. |
| static void GenerateLoadInternalArrayFunction(MacroAssembler* masm, |
| Register result) { |
| // Load the InternalArray function from the native context. |
| __ LoadNativeContextSlot(Context::INTERNAL_ARRAY_FUNCTION_INDEX, result); |
| } |
| |
| void Builtins::Generate_Adaptor(MacroAssembler* masm, Address address, |
| ExitFrameType exit_frame_type) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments excluding receiver |
| // -- x1 : target |
| // -- x3 : new target |
| // -- sp[0] : last argument |
| // -- ... |
| // -- sp[4 * (argc - 1)] : first argument |
| // -- sp[4 * argc] : receiver |
| // ----------------------------------- |
| __ AssertFunction(x1); |
| |
| // Make sure we operate in the context of the called function (for example |
| // ConstructStubs implemented in C++ will be run in the context of the caller |
| // instead of the callee, due to the way that [[Construct]] is defined for |
| // ordinary functions). |
| __ Ldr(cp, FieldMemOperand(x1, JSFunction::kContextOffset)); |
| |
| // JumpToExternalReference expects x0 to contain the number of arguments |
| // including the receiver and the extra arguments. |
| const int num_extra_args = 3; |
| __ Add(x0, x0, num_extra_args + 1); |
| |
| // Insert extra arguments. |
| __ SmiTag(x0); |
| __ Push(x0, x1, x3); |
| __ SmiUntag(x0); |
| |
| __ JumpToExternalReference(ExternalReference(address, masm->isolate()), |
| exit_frame_type == BUILTIN_EXIT); |
| } |
| |
| void Builtins::Generate_InternalArrayCode(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments |
| // -- lr : return address |
| // -- sp[...]: constructor arguments |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_InternalArrayCode"); |
| Label generic_array_code; |
| |
| // Get the InternalArray function. |
| GenerateLoadInternalArrayFunction(masm, x1); |
| |
| if (FLAG_debug_code) { |
| // Initial map for the builtin InternalArray functions should be maps. |
| __ Ldr(x10, FieldMemOperand(x1, JSFunction::kPrototypeOrInitialMapOffset)); |
| __ Tst(x10, kSmiTagMask); |
| __ Assert(ne, kUnexpectedInitialMapForInternalArrayFunction); |
| __ CompareObjectType(x10, x11, x12, MAP_TYPE); |
| __ Assert(eq, kUnexpectedInitialMapForInternalArrayFunction); |
| } |
| |
| // Run the native code for the InternalArray function called as a normal |
| // function. |
| InternalArrayConstructorStub stub(masm->isolate()); |
| __ TailCallStub(&stub); |
| } |
| |
| void Builtins::Generate_ArrayCode(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments |
| // -- lr : return address |
| // -- sp[...]: constructor arguments |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_ArrayCode"); |
| Label generic_array_code, one_or_more_arguments, two_or_more_arguments; |
| |
| // Get the Array function. |
| GenerateLoadArrayFunction(masm, x1); |
| |
| if (FLAG_debug_code) { |
| // Initial map for the builtin Array functions should be maps. |
| __ Ldr(x10, FieldMemOperand(x1, JSFunction::kPrototypeOrInitialMapOffset)); |
| __ Tst(x10, kSmiTagMask); |
| __ Assert(ne, kUnexpectedInitialMapForArrayFunction); |
| __ CompareObjectType(x10, x11, x12, MAP_TYPE); |
| __ Assert(eq, kUnexpectedInitialMapForArrayFunction); |
| } |
| |
| // Run the native code for the Array function called as a normal function. |
| __ LoadRoot(x2, Heap::kUndefinedValueRootIndex); |
| __ Mov(x3, x1); |
| ArrayConstructorStub stub(masm->isolate()); |
| __ TailCallStub(&stub); |
| } |
| |
| // static |
| void Builtins::Generate_MathMaxMin(MacroAssembler* masm, MathMaxMinKind kind) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments |
| // -- x1 : function |
| // -- cp : context |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 8] : arg[n] (zero-based) |
| // -- sp[argc * 8] : receiver |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_MathMaxMin"); |
| |
| Heap::RootListIndex const root_index = |
| (kind == MathMaxMinKind::kMin) ? Heap::kInfinityValueRootIndex |
| : Heap::kMinusInfinityValueRootIndex; |
| |
| // Load the accumulator with the default return value (either -Infinity or |
| // +Infinity), with the tagged value in x5 and the double value in d5. |
| __ LoadRoot(x5, root_index); |
| __ Ldr(d5, FieldMemOperand(x5, HeapNumber::kValueOffset)); |
| |
| Label done_loop, loop; |
| __ mov(x4, x0); |
| __ Bind(&loop); |
| { |
| // Check if all parameters done. |
| __ Subs(x4, x4, 1); |
| __ B(lt, &done_loop); |
| |
| // Load the next parameter tagged value into x2. |
| __ Peek(x2, Operand(x4, LSL, kPointerSizeLog2)); |
| |
| // Load the double value of the parameter into d2, maybe converting the |
| // parameter to a number first using the ToNumber builtin if necessary. |
| Label convert_smi, convert_number, done_convert; |
| __ JumpIfSmi(x2, &convert_smi); |
| __ JumpIfHeapNumber(x2, &convert_number); |
| { |
| // Parameter is not a Number, use the ToNumber builtin to convert it. |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ SmiTag(x0); |
| __ SmiTag(x4); |
| __ EnterBuiltinFrame(cp, x1, x0); |
| __ Push(x5, x4); |
| __ Mov(x0, x2); |
| __ Call(masm->isolate()->builtins()->ToNumber(), RelocInfo::CODE_TARGET); |
| __ Mov(x2, x0); |
| __ Pop(x4, x5); |
| __ LeaveBuiltinFrame(cp, x1, x0); |
| __ SmiUntag(x4); |
| __ SmiUntag(x0); |
| { |
| // Restore the double accumulator value (d5). |
| Label done_restore; |
| __ SmiUntagToDouble(d5, x5, kSpeculativeUntag); |
| __ JumpIfSmi(x5, &done_restore); |
| __ Ldr(d5, FieldMemOperand(x5, HeapNumber::kValueOffset)); |
| __ Bind(&done_restore); |
| } |
| } |
| __ AssertNumber(x2); |
| __ JumpIfSmi(x2, &convert_smi); |
| |
| __ Bind(&convert_number); |
| __ Ldr(d2, FieldMemOperand(x2, HeapNumber::kValueOffset)); |
| __ B(&done_convert); |
| |
| __ Bind(&convert_smi); |
| __ SmiUntagToDouble(d2, x2); |
| __ Bind(&done_convert); |
| |
| // We can use a single fmin/fmax for the operation itself, but we then need |
| // to work out which HeapNumber (or smi) the result came from. |
| __ Fmov(x11, d5); |
| if (kind == MathMaxMinKind::kMin) { |
| __ Fmin(d5, d5, d2); |
| } else { |
| DCHECK(kind == MathMaxMinKind::kMax); |
| __ Fmax(d5, d5, d2); |
| } |
| __ Fmov(x10, d5); |
| __ Cmp(x10, x11); |
| __ Csel(x5, x5, x2, eq); |
| __ B(&loop); |
| } |
| |
| __ Bind(&done_loop); |
| // Drop all slots, including the receiver. |
| __ Add(x0, x0, 1); |
| __ Drop(x0); |
| __ Mov(x0, x5); |
| __ Ret(); |
| } |
| |
| // static |
| void Builtins::Generate_NumberConstructor(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments |
| // -- x1 : constructor function |
| // -- cp : context |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 8] : arg[n] (zero based) |
| // -- sp[argc * 8] : receiver |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_NumberConstructor"); |
| |
| // 1. Load the first argument into x0. |
| Label no_arguments; |
| { |
| __ Cbz(x0, &no_arguments); |
| __ Mov(x2, x0); // Store argc in x2. |
| __ Sub(x0, x0, 1); |
| __ Ldr(x0, MemOperand(jssp, x0, LSL, kPointerSizeLog2)); |
| } |
| |
| // 2a. Convert first argument to number. |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ SmiTag(x2); |
| __ EnterBuiltinFrame(cp, x1, x2); |
| __ Call(masm->isolate()->builtins()->ToNumber(), RelocInfo::CODE_TARGET); |
| __ LeaveBuiltinFrame(cp, x1, x2); |
| __ SmiUntag(x2); |
| } |
| |
| { |
| // Drop all arguments. |
| __ Drop(x2); |
| } |
| |
| // 2b. No arguments, return +0 (already in x0). |
| __ Bind(&no_arguments); |
| __ Drop(1); |
| __ Ret(); |
| } |
| |
| // static |
| void Builtins::Generate_NumberConstructor_ConstructStub(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments |
| // -- x1 : constructor function |
| // -- x3 : new target |
| // -- cp : context |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 8] : arg[n] (zero based) |
| // -- sp[argc * 8] : receiver |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_NumberConstructor_ConstructStub"); |
| |
| // 1. Make sure we operate in the context of the called function. |
| __ Ldr(cp, FieldMemOperand(x1, JSFunction::kContextOffset)); |
| |
| // 2. Load the first argument into x2. |
| { |
| Label no_arguments, done; |
| __ Move(x6, x0); // Store argc in x6. |
| __ Cbz(x0, &no_arguments); |
| __ Sub(x0, x0, 1); |
| __ Ldr(x2, MemOperand(jssp, x0, LSL, kPointerSizeLog2)); |
| __ B(&done); |
| __ Bind(&no_arguments); |
| __ Mov(x2, Smi::FromInt(0)); |
| __ Bind(&done); |
| } |
| |
| // 3. Make sure x2 is a number. |
| { |
| Label done_convert; |
| __ JumpIfSmi(x2, &done_convert); |
| __ JumpIfObjectType(x2, x4, x4, HEAP_NUMBER_TYPE, &done_convert, eq); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ SmiTag(x6); |
| __ EnterBuiltinFrame(cp, x1, x6); |
| __ Push(x3); |
| __ Move(x0, x2); |
| __ Call(masm->isolate()->builtins()->ToNumber(), RelocInfo::CODE_TARGET); |
| __ Move(x2, x0); |
| __ Pop(x3); |
| __ LeaveBuiltinFrame(cp, x1, x6); |
| __ SmiUntag(x6); |
| } |
| __ Bind(&done_convert); |
| } |
| |
| // 4. Check if new target and constructor differ. |
| Label drop_frame_and_ret, new_object; |
| __ Cmp(x1, x3); |
| __ B(ne, &new_object); |
| |
| // 5. Allocate a JSValue wrapper for the number. |
| __ AllocateJSValue(x0, x1, x2, x4, x5, &new_object); |
| __ B(&drop_frame_and_ret); |
| |
| // 6. Fallback to the runtime to create new object. |
| __ bind(&new_object); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| FastNewObjectStub stub(masm->isolate()); |
| __ SmiTag(x6); |
| __ EnterBuiltinFrame(cp, x1, x6); |
| __ Push(x2); // first argument |
| __ CallStub(&stub); |
| __ Pop(x2); |
| __ LeaveBuiltinFrame(cp, x1, x6); |
| __ SmiUntag(x6); |
| } |
| __ Str(x2, FieldMemOperand(x0, JSValue::kValueOffset)); |
| |
| __ bind(&drop_frame_and_ret); |
| { |
| __ Drop(x6); |
| __ Drop(1); |
| __ Ret(); |
| } |
| } |
| |
| // static |
| void Builtins::Generate_StringConstructor(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments |
| // -- x1 : constructor function |
| // -- cp : context |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 8] : arg[n] (zero based) |
| // -- sp[argc * 8] : receiver |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_StringConstructor"); |
| |
| // 1. Load the first argument into x0. |
| Label no_arguments; |
| { |
| __ Cbz(x0, &no_arguments); |
| __ Mov(x2, x0); // Store argc in x2. |
| __ Sub(x0, x0, 1); |
| __ Ldr(x0, MemOperand(jssp, x0, LSL, kPointerSizeLog2)); |
| } |
| |
| // 2a. At least one argument, return x0 if it's a string, otherwise |
| // dispatch to appropriate conversion. |
| Label drop_frame_and_ret, to_string, symbol_descriptive_string; |
| { |
| __ JumpIfSmi(x0, &to_string); |
| STATIC_ASSERT(FIRST_NONSTRING_TYPE == SYMBOL_TYPE); |
| __ CompareObjectType(x0, x3, x3, FIRST_NONSTRING_TYPE); |
| __ B(hi, &to_string); |
| __ B(eq, &symbol_descriptive_string); |
| __ b(&drop_frame_and_ret); |
| } |
| |
| // 2b. No arguments, return the empty string (and pop the receiver). |
| __ Bind(&no_arguments); |
| { |
| __ LoadRoot(x0, Heap::kempty_stringRootIndex); |
| __ Drop(1); |
| __ Ret(); |
| } |
| |
| // 3a. Convert x0 to a string. |
| __ Bind(&to_string); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| ToStringStub stub(masm->isolate()); |
| __ SmiTag(x2); |
| __ EnterBuiltinFrame(cp, x1, x2); |
| __ CallStub(&stub); |
| __ LeaveBuiltinFrame(cp, x1, x2); |
| __ SmiUntag(x2); |
| } |
| __ b(&drop_frame_and_ret); |
| |
| // 3b. Convert symbol in x0 to a string. |
| __ Bind(&symbol_descriptive_string); |
| { |
| __ Drop(x2); |
| __ Drop(1); |
| __ Push(x0); |
| __ TailCallRuntime(Runtime::kSymbolDescriptiveString); |
| } |
| |
| __ bind(&drop_frame_and_ret); |
| { |
| __ Drop(x2); |
| __ Drop(1); |
| __ Ret(); |
| } |
| } |
| |
| // static |
| void Builtins::Generate_StringConstructor_ConstructStub(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments |
| // -- x1 : constructor function |
| // -- x3 : new target |
| // -- cp : context |
| // -- lr : return address |
| // -- sp[(argc - n - 1) * 8] : arg[n] (zero based) |
| // -- sp[argc * 8] : receiver |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_StringConstructor_ConstructStub"); |
| |
| // 1. Make sure we operate in the context of the called function. |
| __ Ldr(cp, FieldMemOperand(x1, JSFunction::kContextOffset)); |
| |
| // 2. Load the first argument into x2. |
| { |
| Label no_arguments, done; |
| __ mov(x6, x0); // Store argc in x6. |
| __ Cbz(x0, &no_arguments); |
| __ Sub(x0, x0, 1); |
| __ Ldr(x2, MemOperand(jssp, x0, LSL, kPointerSizeLog2)); |
| __ B(&done); |
| __ Bind(&no_arguments); |
| __ LoadRoot(x2, Heap::kempty_stringRootIndex); |
| __ Bind(&done); |
| } |
| |
| // 3. Make sure x2 is a string. |
| { |
| Label convert, done_convert; |
| __ JumpIfSmi(x2, &convert); |
| __ JumpIfObjectType(x2, x4, x4, FIRST_NONSTRING_TYPE, &done_convert, lo); |
| __ Bind(&convert); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| ToStringStub stub(masm->isolate()); |
| __ SmiTag(x6); |
| __ EnterBuiltinFrame(cp, x1, x6); |
| __ Push(x3); |
| __ Move(x0, x2); |
| __ CallStub(&stub); |
| __ Move(x2, x0); |
| __ Pop(x3); |
| __ LeaveBuiltinFrame(cp, x1, x6); |
| __ SmiUntag(x6); |
| } |
| __ Bind(&done_convert); |
| } |
| |
| // 4. Check if new target and constructor differ. |
| Label drop_frame_and_ret, new_object; |
| __ Cmp(x1, x3); |
| __ B(ne, &new_object); |
| |
| // 5. Allocate a JSValue wrapper for the string. |
| __ AllocateJSValue(x0, x1, x2, x4, x5, &new_object); |
| __ B(&drop_frame_and_ret); |
| |
| // 6. Fallback to the runtime to create new object. |
| __ bind(&new_object); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| FastNewObjectStub stub(masm->isolate()); |
| __ SmiTag(x6); |
| __ EnterBuiltinFrame(cp, x1, x6); |
| __ Push(x2); // first argument |
| __ CallStub(&stub); |
| __ Pop(x2); |
| __ LeaveBuiltinFrame(cp, x1, x6); |
| __ SmiUntag(x6); |
| } |
| __ Str(x2, FieldMemOperand(x0, JSValue::kValueOffset)); |
| |
| __ bind(&drop_frame_and_ret); |
| { |
| __ Drop(x6); |
| __ Drop(1); |
| __ Ret(); |
| } |
| } |
| |
| static void GenerateTailCallToSharedCode(MacroAssembler* masm) { |
| __ Ldr(x2, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(x2, FieldMemOperand(x2, SharedFunctionInfo::kCodeOffset)); |
| __ Add(x2, x2, Code::kHeaderSize - kHeapObjectTag); |
| __ Br(x2); |
| } |
| |
| static void GenerateTailCallToReturnedCode(MacroAssembler* masm, |
| Runtime::FunctionId function_id) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argument count (preserved for callee) |
| // -- x1 : target function (preserved for callee) |
| // -- x3 : new target (preserved for callee) |
| // ----------------------------------- |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| // Push a copy of the target function and the new target. |
| // Push another copy as a parameter to the runtime call. |
| __ SmiTag(x0); |
| __ Push(x0, x1, x3, x1); |
| |
| __ CallRuntime(function_id, 1); |
| __ Move(x2, x0); |
| |
| // Restore target function and new target. |
| __ Pop(x3, x1, x0); |
| __ SmiUntag(x0); |
| } |
| |
| __ Add(x2, x2, Code::kHeaderSize - kHeapObjectTag); |
| __ Br(x2); |
| } |
| |
| void Builtins::Generate_InOptimizationQueue(MacroAssembler* masm) { |
| // Checking whether the queued function is ready for install is optional, |
| // since we come across interrupts and stack checks elsewhere. However, not |
| // checking may delay installing ready functions, and always checking would be |
| // quite expensive. A good compromise is to first check against stack limit as |
| // a cue for an interrupt signal. |
| Label ok; |
| __ CompareRoot(masm->StackPointer(), Heap::kStackLimitRootIndex); |
| __ B(hs, &ok); |
| |
| GenerateTailCallToReturnedCode(masm, Runtime::kTryInstallOptimizedCode); |
| |
| __ Bind(&ok); |
| GenerateTailCallToSharedCode(masm); |
| } |
| |
| static void Generate_JSConstructStubHelper(MacroAssembler* masm, |
| bool is_api_function, |
| bool create_implicit_receiver, |
| bool check_derived_construct) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments |
| // -- x1 : constructor function |
| // -- x2 : allocation site or undefined |
| // -- x3 : new target |
| // -- lr : return address |
| // -- cp : context pointer |
| // -- sp[...]: constructor arguments |
| // ----------------------------------- |
| |
| ASM_LOCATION("Builtins::Generate_JSConstructStubHelper"); |
| |
| Isolate* isolate = masm->isolate(); |
| |
| // Enter a construct frame. |
| { |
| FrameScope scope(masm, StackFrame::CONSTRUCT); |
| |
| // Preserve the four incoming parameters on the stack. |
| Register argc = x0; |
| Register constructor = x1; |
| Register allocation_site = x2; |
| Register new_target = x3; |
| |
| // Preserve the incoming parameters on the stack. |
| __ AssertUndefinedOrAllocationSite(allocation_site, x10); |
| __ Push(cp); |
| __ SmiTag(argc); |
| __ Push(allocation_site, argc); |
| |
| if (create_implicit_receiver) { |
| // Allocate the new receiver object. |
| __ Push(constructor, new_target); |
| FastNewObjectStub stub(masm->isolate()); |
| __ CallStub(&stub); |
| __ Mov(x4, x0); |
| __ Pop(new_target, constructor); |
| |
| // ----------- S t a t e ------------- |
| // -- x1: constructor function |
| // -- x3: new target |
| // -- x4: newly allocated object |
| // ----------------------------------- |
| |
| // Reload the number of arguments from the stack. |
| // Set it up in x0 for the function call below. |
| // jssp[0]: number of arguments (smi-tagged) |
| __ Peek(argc, 0); // Load number of arguments. |
| } |
| |
| __ SmiUntag(argc); |
| |
| if (create_implicit_receiver) { |
| // Push the allocated receiver to the stack. We need two copies |
| // because we may have to return the original one and the calling |
| // conventions dictate that the called function pops the receiver. |
| __ Push(x4, x4); |
| } else { |
| __ PushRoot(Heap::kTheHoleValueRootIndex); |
| } |
| |
| // Set up pointer to last argument. |
| __ Add(x2, fp, StandardFrameConstants::kCallerSPOffset); |
| |
| // Copy arguments and receiver to the expression stack. |
| // Copy 2 values every loop to use ldp/stp. |
| // x0: number of arguments |
| // x1: constructor function |
| // x2: address of last argument (caller sp) |
| // x3: new target |
| // jssp[0]: receiver |
| // jssp[1]: receiver |
| // jssp[2]: number of arguments (smi-tagged) |
| // Compute the start address of the copy in x3. |
| __ Add(x4, x2, Operand(argc, LSL, kPointerSizeLog2)); |
| Label loop, entry, done_copying_arguments; |
| __ B(&entry); |
| __ Bind(&loop); |
| __ Ldp(x10, x11, MemOperand(x4, -2 * kPointerSize, PreIndex)); |
| __ Push(x11, x10); |
| __ Bind(&entry); |
| __ Cmp(x4, x2); |
| __ B(gt, &loop); |
| // Because we copied values 2 by 2 we may have copied one extra value. |
| // Drop it if that is the case. |
| __ B(eq, &done_copying_arguments); |
| __ Drop(1); |
| __ Bind(&done_copying_arguments); |
| |
| // Call the function. |
| // x0: number of arguments |
| // x1: constructor function |
| // x3: new target |
| ParameterCount actual(argc); |
| __ InvokeFunction(constructor, new_target, actual, CALL_FUNCTION, |
| CheckDebugStepCallWrapper()); |
| |
| // Store offset of return address for deoptimizer. |
| if (create_implicit_receiver && !is_api_function) { |
| masm->isolate()->heap()->SetConstructStubDeoptPCOffset(masm->pc_offset()); |
| } |
| |
| // Restore the context from the frame. |
| // x0: result |
| // jssp[0]: receiver |
| // jssp[1]: number of arguments (smi-tagged) |
| __ Ldr(cp, MemOperand(fp, ConstructFrameConstants::kContextOffset)); |
| |
| if (create_implicit_receiver) { |
| // If the result is an object (in the ECMA sense), we should get rid |
| // of the receiver and use the result; see ECMA-262 section 13.2.2-7 |
| // on page 74. |
| Label use_receiver, exit; |
| |
| // If the result is a smi, it is *not* an object in the ECMA sense. |
| // x0: result |
| // jssp[0]: receiver (newly allocated object) |
| // jssp[1]: number of arguments (smi-tagged) |
| __ JumpIfSmi(x0, &use_receiver); |
| |
| // If the type of the result (stored in its map) is less than |
| // FIRST_JS_RECEIVER_TYPE, it is not an object in the ECMA sense. |
| __ JumpIfObjectType(x0, x1, x3, FIRST_JS_RECEIVER_TYPE, &exit, ge); |
| |
| // Throw away the result of the constructor invocation and use the |
| // on-stack receiver as the result. |
| __ Bind(&use_receiver); |
| __ Peek(x0, 0); |
| |
| // Remove the receiver from the stack, remove caller arguments, and |
| // return. |
| __ Bind(&exit); |
| // x0: result |
| // jssp[0]: receiver (newly allocated object) |
| // jssp[1]: number of arguments (smi-tagged) |
| __ Peek(x1, 1 * kXRegSize); |
| } else { |
| __ Peek(x1, 0); |
| } |
| |
| // Leave construct frame. |
| } |
| |
| // ES6 9.2.2. Step 13+ |
| // Check that the result is not a Smi, indicating that the constructor result |
| // from a derived class is neither undefined nor an Object. |
| if (check_derived_construct) { |
| Label dont_throw; |
| __ JumpIfNotSmi(x0, &dont_throw); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ CallRuntime(Runtime::kThrowDerivedConstructorReturnedNonObject); |
| } |
| __ Bind(&dont_throw); |
| } |
| |
| __ DropBySMI(x1); |
| __ Drop(1); |
| if (create_implicit_receiver) { |
| __ IncrementCounter(isolate->counters()->constructed_objects(), 1, x1, x2); |
| } |
| __ Ret(); |
| } |
| |
| void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) { |
| Generate_JSConstructStubHelper(masm, false, true, false); |
| } |
| |
| void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) { |
| Generate_JSConstructStubHelper(masm, true, false, false); |
| } |
| |
| void Builtins::Generate_JSBuiltinsConstructStub(MacroAssembler* masm) { |
| Generate_JSConstructStubHelper(masm, false, false, false); |
| } |
| |
| void Builtins::Generate_JSBuiltinsConstructStubForDerived( |
| MacroAssembler* masm) { |
| Generate_JSConstructStubHelper(masm, false, false, true); |
| } |
| |
| void Builtins::Generate_ConstructedNonConstructable(MacroAssembler* masm) { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ Push(x1); |
| __ CallRuntime(Runtime::kThrowConstructedNonConstructable); |
| } |
| |
| // static |
| void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the value to pass to the generator |
| // -- x1 : the JSGeneratorObject to resume |
| // -- x2 : the resume mode (tagged) |
| // -- lr : return address |
| // ----------------------------------- |
| __ AssertGeneratorObject(x1); |
| |
| // Store input value into generator object. |
| __ Str(x0, FieldMemOperand(x1, JSGeneratorObject::kInputOrDebugPosOffset)); |
| __ RecordWriteField(x1, JSGeneratorObject::kInputOrDebugPosOffset, x0, x3, |
| kLRHasNotBeenSaved, kDontSaveFPRegs); |
| |
| // Store resume mode into generator object. |
| __ Str(x2, FieldMemOperand(x1, JSGeneratorObject::kResumeModeOffset)); |
| |
| // Load suspended function and context. |
| __ Ldr(cp, FieldMemOperand(x1, JSGeneratorObject::kContextOffset)); |
| __ Ldr(x4, FieldMemOperand(x1, JSGeneratorObject::kFunctionOffset)); |
| |
| // Flood function if we are stepping. |
| Label prepare_step_in_if_stepping, prepare_step_in_suspended_generator; |
| Label stepping_prepared; |
| ExternalReference last_step_action = |
| ExternalReference::debug_last_step_action_address(masm->isolate()); |
| STATIC_ASSERT(StepFrame > StepIn); |
| __ Mov(x10, Operand(last_step_action)); |
| __ Ldrsb(x10, MemOperand(x10)); |
| __ CompareAndBranch(x10, Operand(StepIn), ge, &prepare_step_in_if_stepping); |
| |
| // Flood function if we need to continue stepping in the suspended generator. |
| ExternalReference debug_suspended_generator = |
| ExternalReference::debug_suspended_generator_address(masm->isolate()); |
| __ Mov(x10, Operand(debug_suspended_generator)); |
| __ Ldr(x10, MemOperand(x10)); |
| __ CompareAndBranch(x10, Operand(x1), eq, |
| &prepare_step_in_suspended_generator); |
| __ Bind(&stepping_prepared); |
| |
| // Push receiver. |
| __ Ldr(x5, FieldMemOperand(x1, JSGeneratorObject::kReceiverOffset)); |
| __ Push(x5); |
| |
| // ----------- S t a t e ------------- |
| // -- x1 : the JSGeneratorObject to resume |
| // -- x2 : the resume mode (tagged) |
| // -- x4 : generator function |
| // -- cp : generator context |
| // -- lr : return address |
| // -- jssp[0] : generator receiver |
| // ----------------------------------- |
| |
| // Push holes for arguments to generator function. Since the parser forced |
| // context allocation for any variables in generators, the actual argument |
| // values have already been copied into the context and these dummy values |
| // will never be used. |
| __ Ldr(x10, FieldMemOperand(x4, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(w10, |
| FieldMemOperand(x10, SharedFunctionInfo::kFormalParameterCountOffset)); |
| __ LoadRoot(x11, Heap::kTheHoleValueRootIndex); |
| __ PushMultipleTimes(x11, w10); |
| |
| // Dispatch on the kind of generator object. |
| Label old_generator; |
| __ Ldr(x3, FieldMemOperand(x4, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(x3, FieldMemOperand(x3, SharedFunctionInfo::kFunctionDataOffset)); |
| __ CompareObjectType(x3, x3, x3, BYTECODE_ARRAY_TYPE); |
| __ B(ne, &old_generator); |
| |
| // New-style (ignition/turbofan) generator object |
| { |
| __ Ldr(x0, FieldMemOperand(x4, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(w0, FieldMemOperand( |
| x0, SharedFunctionInfo::kFormalParameterCountOffset)); |
| // We abuse new.target both to indicate that this is a resume call and to |
| // pass in the generator object. In ordinary calls, new.target is always |
| // undefined because generator functions are non-constructable. |
| __ Move(x3, x1); |
| __ Move(x1, x4); |
| __ Ldr(x5, FieldMemOperand(x1, JSFunction::kCodeEntryOffset)); |
| __ Jump(x5); |
| } |
| |
| // Old-style (full-codegen) generator object |
| __ bind(&old_generator); |
| { |
| // Enter a new JavaScript frame, and initialize its slots as they were when |
| // the generator was suspended. |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ Push(lr, fp); |
| __ Move(fp, jssp); |
| __ Push(cp, x4); |
| |
| // Restore the operand stack. |
| __ Ldr(x0, FieldMemOperand(x1, JSGeneratorObject::kOperandStackOffset)); |
| __ Ldr(w3, UntagSmiFieldMemOperand(x0, FixedArray::kLengthOffset)); |
| __ Add(x0, x0, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| __ Add(x3, x0, Operand(x3, LSL, kPointerSizeLog2)); |
| { |
| Label done_loop, loop; |
| __ Bind(&loop); |
| __ Cmp(x0, x3); |
| __ B(eq, &done_loop); |
| __ Ldr(x10, MemOperand(x0, kPointerSize, PostIndex)); |
| __ Push(x10); |
| __ B(&loop); |
| __ Bind(&done_loop); |
| } |
| |
| // Reset operand stack so we don't leak. |
| __ LoadRoot(x10, Heap::kEmptyFixedArrayRootIndex); |
| __ Str(x10, FieldMemOperand(x1, JSGeneratorObject::kOperandStackOffset)); |
| |
| // Resume the generator function at the continuation. |
| __ Ldr(x10, FieldMemOperand(x4, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(x10, FieldMemOperand(x10, SharedFunctionInfo::kCodeOffset)); |
| __ Add(x10, x10, Code::kHeaderSize - kHeapObjectTag); |
| __ Ldrsw(x11, UntagSmiFieldMemOperand( |
| x1, JSGeneratorObject::kContinuationOffset)); |
| __ Add(x10, x10, x11); |
| __ Mov(x12, Smi::FromInt(JSGeneratorObject::kGeneratorExecuting)); |
| __ Str(x12, FieldMemOperand(x1, JSGeneratorObject::kContinuationOffset)); |
| __ Move(x0, x1); // Continuation expects generator object in x0. |
| __ Br(x10); |
| } |
| |
| __ Bind(&prepare_step_in_if_stepping); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ Push(x1, x2, x4); |
| __ CallRuntime(Runtime::kDebugPrepareStepInIfStepping); |
| __ Pop(x2, x1); |
| __ Ldr(x4, FieldMemOperand(x1, JSGeneratorObject::kFunctionOffset)); |
| } |
| __ B(&stepping_prepared); |
| |
| __ Bind(&prepare_step_in_suspended_generator); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ Push(x1, x2); |
| __ CallRuntime(Runtime::kDebugPrepareStepInSuspendedGenerator); |
| __ Pop(x2, x1); |
| __ Ldr(x4, FieldMemOperand(x1, JSGeneratorObject::kFunctionOffset)); |
| } |
| __ B(&stepping_prepared); |
| } |
| |
| enum IsTagged { kArgcIsSmiTagged, kArgcIsUntaggedInt }; |
| |
| // Clobbers x10, x15; preserves all other registers. |
| static void Generate_CheckStackOverflow(MacroAssembler* masm, Register argc, |
| IsTagged argc_is_tagged) { |
| // Check the stack for overflow. |
| // We are not trying to catch interruptions (e.g. debug break and |
| // preemption) here, so the "real stack limit" is checked. |
| Label enough_stack_space; |
| __ LoadRoot(x10, Heap::kRealStackLimitRootIndex); |
| // Make x10 the space we have left. The stack might already be overflowed |
| // here which will cause x10 to become negative. |
| // TODO(jbramley): Check that the stack usage here is safe. |
| __ Sub(x10, jssp, x10); |
| // Check if the arguments will overflow the stack. |
| if (argc_is_tagged == kArgcIsSmiTagged) { |
| __ Cmp(x10, Operand::UntagSmiAndScale(argc, kPointerSizeLog2)); |
| } else { |
| DCHECK(argc_is_tagged == kArgcIsUntaggedInt); |
| __ Cmp(x10, Operand(argc, LSL, kPointerSizeLog2)); |
| } |
| __ B(gt, &enough_stack_space); |
| __ CallRuntime(Runtime::kThrowStackOverflow); |
| // We should never return from the APPLY_OVERFLOW builtin. |
| if (__ emit_debug_code()) { |
| __ Unreachable(); |
| } |
| |
| __ Bind(&enough_stack_space); |
| } |
| |
| // Input: |
| // x0: new.target. |
| // x1: function. |
| // x2: receiver. |
| // x3: argc. |
| // x4: argv. |
| // Output: |
| // x0: result. |
| static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm, |
| bool is_construct) { |
| // Called from JSEntryStub::GenerateBody(). |
| Register new_target = x0; |
| Register function = x1; |
| Register receiver = x2; |
| Register argc = x3; |
| Register argv = x4; |
| Register scratch = x10; |
| |
| ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| |
| { |
| // Enter an internal frame. |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| |
| // Setup the context (we need to use the caller context from the isolate). |
| __ Mov(scratch, Operand(ExternalReference(Isolate::kContextAddress, |
| masm->isolate()))); |
| __ Ldr(cp, MemOperand(scratch)); |
| |
| __ InitializeRootRegister(); |
| |
| // Push the function and the receiver onto the stack. |
| __ Push(function, receiver); |
| |
| // Check if we have enough stack space to push all arguments. |
| // Expects argument count in eax. Clobbers ecx, edx, edi. |
| Generate_CheckStackOverflow(masm, argc, kArgcIsUntaggedInt); |
| |
| // Copy arguments to the stack in a loop, in reverse order. |
| // x3: argc. |
| // x4: argv. |
| Label loop, entry; |
| // Compute the copy end address. |
| __ Add(scratch, argv, Operand(argc, LSL, kPointerSizeLog2)); |
| |
| __ B(&entry); |
| __ Bind(&loop); |
| __ Ldr(x11, MemOperand(argv, kPointerSize, PostIndex)); |
| __ Ldr(x12, MemOperand(x11)); // Dereference the handle. |
| __ Push(x12); // Push the argument. |
| __ Bind(&entry); |
| __ Cmp(scratch, argv); |
| __ B(ne, &loop); |
| |
| __ Mov(scratch, argc); |
| __ Mov(argc, new_target); |
| __ Mov(new_target, scratch); |
| // x0: argc. |
| // x3: new.target. |
| |
| // Initialize all JavaScript callee-saved registers, since they will be seen |
| // by the garbage collector as part of handlers. |
| // The original values have been saved in JSEntryStub::GenerateBody(). |
| __ LoadRoot(x19, Heap::kUndefinedValueRootIndex); |
| __ Mov(x20, x19); |
| __ Mov(x21, x19); |
| __ Mov(x22, x19); |
| __ Mov(x23, x19); |
| __ Mov(x24, x19); |
| __ Mov(x25, x19); |
| // Don't initialize the reserved registers. |
| // x26 : root register (root). |
| // x27 : context pointer (cp). |
| // x28 : JS stack pointer (jssp). |
| // x29 : frame pointer (fp). |
| |
| Handle<Code> builtin = is_construct |
| ? masm->isolate()->builtins()->Construct() |
| : masm->isolate()->builtins()->Call(); |
| __ Call(builtin, RelocInfo::CODE_TARGET); |
| |
| // Exit the JS internal frame and remove the parameters (except function), |
| // and return. |
| } |
| |
| // Result is in x0. Return. |
| __ Ret(); |
| } |
| |
| void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) { |
| Generate_JSEntryTrampolineHelper(masm, false); |
| } |
| |
| void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) { |
| Generate_JSEntryTrampolineHelper(masm, true); |
| } |
| |
| static void LeaveInterpreterFrame(MacroAssembler* masm, Register scratch) { |
| Register args_count = scratch; |
| |
| // Get the arguments + receiver count. |
| __ ldr(args_count, |
| MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp)); |
| __ Ldr(args_count.W(), |
| FieldMemOperand(args_count, BytecodeArray::kParameterSizeOffset)); |
| |
| // Leave the frame (also dropping the register file). |
| __ LeaveFrame(StackFrame::JAVA_SCRIPT); |
| |
| // Drop receiver + arguments. |
| __ Drop(args_count, 1); |
| } |
| |
| // Generate code for entering a JS function with the interpreter. |
| // On entry to the function the receiver and arguments have been pushed on the |
| // stack left to right. The actual argument count matches the formal parameter |
| // count expected by the function. |
| // |
| // The live registers are: |
| // - x1: the JS function object being called. |
| // - x3: the new target |
| // - cp: our context. |
| // - fp: our caller's frame pointer. |
| // - jssp: stack pointer. |
| // - lr: return address. |
| // |
| // The function builds an interpreter frame. See InterpreterFrameConstants in |
| // frames.h for its layout. |
| void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) { |
| ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| |
| // Open a frame scope to indicate that there is a frame on the stack. The |
| // MANUAL indicates that the scope shouldn't actually generate code to set up |
| // the frame (that is done below). |
| FrameScope frame_scope(masm, StackFrame::MANUAL); |
| __ Push(lr, fp, cp, x1); |
| __ Add(fp, jssp, StandardFrameConstants::kFixedFrameSizeFromFp); |
| |
| // Get the bytecode array from the function object (or from the DebugInfo if |
| // it is present) and load it into kInterpreterBytecodeArrayRegister. |
| __ Ldr(x0, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
| Register debug_info = kInterpreterBytecodeArrayRegister; |
| Label load_debug_bytecode_array, bytecode_array_loaded; |
| DCHECK(!debug_info.is(x0)); |
| __ Ldr(debug_info, FieldMemOperand(x0, SharedFunctionInfo::kDebugInfoOffset)); |
| __ Cmp(debug_info, Operand(DebugInfo::uninitialized())); |
| __ B(ne, &load_debug_bytecode_array); |
| __ Ldr(kInterpreterBytecodeArrayRegister, |
| FieldMemOperand(x0, SharedFunctionInfo::kFunctionDataOffset)); |
| __ Bind(&bytecode_array_loaded); |
| |
| // Check function data field is actually a BytecodeArray object. |
| Label bytecode_array_not_present; |
| __ CompareRoot(kInterpreterBytecodeArrayRegister, |
| Heap::kUndefinedValueRootIndex); |
| __ B(eq, &bytecode_array_not_present); |
| if (FLAG_debug_code) { |
| __ AssertNotSmi(kInterpreterBytecodeArrayRegister, |
| kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry); |
| __ CompareObjectType(kInterpreterBytecodeArrayRegister, x0, x0, |
| BYTECODE_ARRAY_TYPE); |
| __ Assert(eq, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry); |
| } |
| |
| // Load the initial bytecode offset. |
| __ Mov(kInterpreterBytecodeOffsetRegister, |
| Operand(BytecodeArray::kHeaderSize - kHeapObjectTag)); |
| |
| // Push new.target, bytecode array and Smi tagged bytecode array offset. |
| __ SmiTag(x0, kInterpreterBytecodeOffsetRegister); |
| __ Push(x3, kInterpreterBytecodeArrayRegister, x0); |
| |
| // Allocate the local and temporary register file on the stack. |
| { |
| // Load frame size from the BytecodeArray object. |
| __ Ldr(w11, FieldMemOperand(kInterpreterBytecodeArrayRegister, |
| BytecodeArray::kFrameSizeOffset)); |
| |
| // Do a stack check to ensure we don't go over the limit. |
| Label ok; |
| DCHECK(jssp.Is(__ StackPointer())); |
| __ Sub(x10, jssp, Operand(x11)); |
| __ CompareRoot(x10, Heap::kRealStackLimitRootIndex); |
| __ B(hs, &ok); |
| __ CallRuntime(Runtime::kThrowStackOverflow); |
| __ Bind(&ok); |
| |
| // If ok, push undefined as the initial value for all register file entries. |
| // Note: there should always be at least one stack slot for the return |
| // register in the register file. |
| Label loop_header; |
| __ LoadRoot(x10, Heap::kUndefinedValueRootIndex); |
| // TODO(rmcilroy): Ensure we always have an even number of registers to |
| // allow stack to be 16 bit aligned (and remove need for jssp). |
| __ Lsr(x11, x11, kPointerSizeLog2); |
| __ PushMultipleTimes(x10, x11); |
| __ Bind(&loop_header); |
| } |
| |
| // Load accumulator and dispatch table into registers. |
| __ LoadRoot(kInterpreterAccumulatorRegister, Heap::kUndefinedValueRootIndex); |
| __ Mov(kInterpreterDispatchTableRegister, |
| Operand(ExternalReference::interpreter_dispatch_table_address( |
| masm->isolate()))); |
| |
| // Dispatch to the first bytecode handler for the function. |
| __ Ldrb(x1, MemOperand(kInterpreterBytecodeArrayRegister, |
| kInterpreterBytecodeOffsetRegister)); |
| __ Mov(x1, Operand(x1, LSL, kPointerSizeLog2)); |
| __ Ldr(ip0, MemOperand(kInterpreterDispatchTableRegister, x1)); |
| __ Call(ip0); |
| masm->isolate()->heap()->SetInterpreterEntryReturnPCOffset(masm->pc_offset()); |
| |
| // The return value is in x0. |
| LeaveInterpreterFrame(masm, x2); |
| __ Ret(); |
| |
| // Load debug copy of the bytecode array. |
| __ Bind(&load_debug_bytecode_array); |
| __ Ldr(kInterpreterBytecodeArrayRegister, |
| FieldMemOperand(debug_info, DebugInfo::kAbstractCodeIndex)); |
| __ B(&bytecode_array_loaded); |
| |
| // If the bytecode array is no longer present, then the underlying function |
| // has been switched to a different kind of code and we heal the closure by |
| // switching the code entry field over to the new code object as well. |
| __ Bind(&bytecode_array_not_present); |
| __ LeaveFrame(StackFrame::JAVA_SCRIPT); |
| __ Ldr(x7, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(x7, FieldMemOperand(x7, SharedFunctionInfo::kCodeOffset)); |
| __ Add(x7, x7, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ Str(x7, FieldMemOperand(x1, JSFunction::kCodeEntryOffset)); |
| __ RecordWriteCodeEntryField(x1, x7, x5); |
| __ Jump(x7); |
| } |
| |
| void Builtins::Generate_InterpreterMarkBaselineOnReturn(MacroAssembler* masm) { |
| // Save the function and context for call to CompileBaseline. |
| __ ldr(x1, MemOperand(fp, StandardFrameConstants::kFunctionOffset)); |
| __ ldr(kContextRegister, |
| MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| |
| // Leave the frame before recompiling for baseline so that we don't count as |
| // an activation on the stack. |
| LeaveInterpreterFrame(masm, x2); |
| |
| { |
| FrameScope frame_scope(masm, StackFrame::INTERNAL); |
| // Push return value. |
| __ push(x0); |
| |
| // Push function as argument and compile for baseline. |
| __ push(x1); |
| __ CallRuntime(Runtime::kCompileBaseline); |
| |
| // Restore return value. |
| __ pop(x0); |
| } |
| __ Ret(); |
| } |
| |
| // static |
| void Builtins::Generate_InterpreterPushArgsAndCallImpl( |
| MacroAssembler* masm, TailCallMode tail_call_mode, |
| CallableType function_type) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x2 : the address of the first argument to be pushed. Subsequent |
| // arguments should be consecutive above this, in the same order as |
| // they are to be pushed onto the stack. |
| // -- x1 : the target to call (can be any Object). |
| // ----------------------------------- |
| |
| // Find the address of the last argument. |
| __ add(x3, x0, Operand(1)); // Add one for receiver. |
| __ lsl(x3, x3, kPointerSizeLog2); |
| __ sub(x4, x2, x3); |
| |
| // Push the arguments. |
| Label loop_header, loop_check; |
| __ Mov(x5, jssp); |
| __ Claim(x3, 1); |
| __ B(&loop_check); |
| __ Bind(&loop_header); |
| // TODO(rmcilroy): Push two at a time once we ensure we keep stack aligned. |
| __ Ldr(x3, MemOperand(x2, -kPointerSize, PostIndex)); |
| __ Str(x3, MemOperand(x5, -kPointerSize, PreIndex)); |
| __ Bind(&loop_check); |
| __ Cmp(x2, x4); |
| __ B(gt, &loop_header); |
| |
| // Call the target. |
| if (function_type == CallableType::kJSFunction) { |
| __ Jump(masm->isolate()->builtins()->CallFunction(ConvertReceiverMode::kAny, |
| tail_call_mode), |
| RelocInfo::CODE_TARGET); |
| } else { |
| DCHECK_EQ(function_type, CallableType::kAny); |
| __ Jump(masm->isolate()->builtins()->Call(ConvertReceiverMode::kAny, |
| tail_call_mode), |
| RelocInfo::CODE_TARGET); |
| } |
| } |
| |
| // static |
| void Builtins::Generate_InterpreterPushArgsAndConstruct(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argument count (not including receiver) |
| // -- x3 : new target |
| // -- x1 : constructor to call |
| // -- x2 : address of the first argument |
| // ----------------------------------- |
| |
| // Find the address of the last argument. |
| __ add(x5, x0, Operand(1)); // Add one for receiver (to be constructed). |
| __ lsl(x5, x5, kPointerSizeLog2); |
| |
| // Set stack pointer and where to stop. |
| __ Mov(x6, jssp); |
| __ Claim(x5, 1); |
| __ sub(x4, x6, x5); |
| |
| // Push a slot for the receiver. |
| __ Str(xzr, MemOperand(x6, -kPointerSize, PreIndex)); |
| |
| Label loop_header, loop_check; |
| // Push the arguments. |
| __ B(&loop_check); |
| __ Bind(&loop_header); |
| // TODO(rmcilroy): Push two at a time once we ensure we keep stack aligned. |
| __ Ldr(x5, MemOperand(x2, -kPointerSize, PostIndex)); |
| __ Str(x5, MemOperand(x6, -kPointerSize, PreIndex)); |
| __ Bind(&loop_check); |
| __ Cmp(x6, x4); |
| __ B(gt, &loop_header); |
| |
| // Call the constructor with x0, x1, and x3 unmodified. |
| __ Jump(masm->isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET); |
| } |
| |
| void Builtins::Generate_InterpreterEnterBytecodeDispatch(MacroAssembler* masm) { |
| // Set the return address to the correct point in the interpreter entry |
| // trampoline. |
| Smi* interpreter_entry_return_pc_offset( |
| masm->isolate()->heap()->interpreter_entry_return_pc_offset()); |
| DCHECK_NE(interpreter_entry_return_pc_offset, Smi::FromInt(0)); |
| __ LoadObject(x1, masm->isolate()->builtins()->InterpreterEntryTrampoline()); |
| __ Add(lr, x1, Operand(interpreter_entry_return_pc_offset->value() + |
| Code::kHeaderSize - kHeapObjectTag)); |
| |
| // Initialize the dispatch table register. |
| __ Mov(kInterpreterDispatchTableRegister, |
| Operand(ExternalReference::interpreter_dispatch_table_address( |
| masm->isolate()))); |
| |
| // Get the bytecode array pointer from the frame. |
| __ Ldr(kInterpreterBytecodeArrayRegister, |
| MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp)); |
| |
| if (FLAG_debug_code) { |
| // Check function data field is actually a BytecodeArray object. |
| __ AssertNotSmi(kInterpreterBytecodeArrayRegister, |
| kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry); |
| __ CompareObjectType(kInterpreterBytecodeArrayRegister, x1, x1, |
| BYTECODE_ARRAY_TYPE); |
| __ Assert(eq, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry); |
| } |
| |
| // Get the target bytecode offset from the frame. |
| __ Ldr(kInterpreterBytecodeOffsetRegister, |
| MemOperand(fp, InterpreterFrameConstants::kBytecodeOffsetFromFp)); |
| __ SmiUntag(kInterpreterBytecodeOffsetRegister); |
| |
| // Dispatch to the target bytecode. |
| __ Ldrb(x1, MemOperand(kInterpreterBytecodeArrayRegister, |
| kInterpreterBytecodeOffsetRegister)); |
| __ Mov(x1, Operand(x1, LSL, kPointerSizeLog2)); |
| __ Ldr(ip0, MemOperand(kInterpreterDispatchTableRegister, x1)); |
| __ Jump(ip0); |
| } |
| |
| void Builtins::Generate_CompileLazy(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argument count (preserved for callee) |
| // -- x3 : new target (preserved for callee) |
| // -- x1 : target function (preserved for callee) |
| // ----------------------------------- |
| // First lookup code, maybe we don't need to compile! |
| Label gotta_call_runtime; |
| Label maybe_call_runtime; |
| Label try_shared; |
| Label loop_top, loop_bottom; |
| |
| Register closure = x1; |
| Register map = x13; |
| Register index = x2; |
| __ Ldr(map, FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(map, |
| FieldMemOperand(map, SharedFunctionInfo::kOptimizedCodeMapOffset)); |
| __ Ldrsw(index, UntagSmiFieldMemOperand(map, FixedArray::kLengthOffset)); |
| __ Cmp(index, Operand(2)); |
| __ B(lt, &gotta_call_runtime); |
| |
| // Find literals. |
| // x3 : native context |
| // x2 : length / index |
| // x13 : optimized code map |
| // stack[0] : new target |
| // stack[4] : closure |
| Register native_context = x4; |
| __ Ldr(native_context, NativeContextMemOperand()); |
| |
| __ Bind(&loop_top); |
| Register temp = x5; |
| Register array_pointer = x6; |
| |
| // Does the native context match? |
| __ Add(array_pointer, map, Operand(index, LSL, kPointerSizeLog2)); |
| __ Ldr(temp, FieldMemOperand(array_pointer, |
| SharedFunctionInfo::kOffsetToPreviousContext)); |
| __ Ldr(temp, FieldMemOperand(temp, WeakCell::kValueOffset)); |
| __ Cmp(temp, native_context); |
| __ B(ne, &loop_bottom); |
| // OSR id set to none? |
| __ Ldr(temp, FieldMemOperand(array_pointer, |
| SharedFunctionInfo::kOffsetToPreviousOsrAstId)); |
| const int bailout_id = BailoutId::None().ToInt(); |
| __ Cmp(temp, Operand(Smi::FromInt(bailout_id))); |
| __ B(ne, &loop_bottom); |
| // Literals available? |
| __ Ldr(temp, FieldMemOperand(array_pointer, |
| SharedFunctionInfo::kOffsetToPreviousLiterals)); |
| __ Ldr(temp, FieldMemOperand(temp, WeakCell::kValueOffset)); |
| __ JumpIfSmi(temp, &gotta_call_runtime); |
| |
| // Save the literals in the closure. |
| __ Str(temp, FieldMemOperand(closure, JSFunction::kLiteralsOffset)); |
| __ RecordWriteField(closure, JSFunction::kLiteralsOffset, temp, x7, |
| kLRHasNotBeenSaved, kDontSaveFPRegs, EMIT_REMEMBERED_SET, |
| OMIT_SMI_CHECK); |
| |
| // Code available? |
| Register entry = x7; |
| __ Ldr(entry, |
| FieldMemOperand(array_pointer, |
| SharedFunctionInfo::kOffsetToPreviousCachedCode)); |
| __ Ldr(entry, FieldMemOperand(entry, WeakCell::kValueOffset)); |
| __ JumpIfSmi(entry, &maybe_call_runtime); |
| |
| // Found literals and code. Get them into the closure and return. |
| __ Add(entry, entry, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| |
| Label install_optimized_code_and_tailcall; |
| __ Bind(&install_optimized_code_and_tailcall); |
| __ Str(entry, FieldMemOperand(closure, JSFunction::kCodeEntryOffset)); |
| __ RecordWriteCodeEntryField(closure, entry, x5); |
| |
| // Link the closure into the optimized function list. |
| // x7 : code entry |
| // x4 : native context |
| // x1 : closure |
| __ Ldr(x8, |
| ContextMemOperand(native_context, Context::OPTIMIZED_FUNCTIONS_LIST)); |
| __ Str(x8, FieldMemOperand(closure, JSFunction::kNextFunctionLinkOffset)); |
| __ RecordWriteField(closure, JSFunction::kNextFunctionLinkOffset, x8, x13, |
| kLRHasNotBeenSaved, kDontSaveFPRegs, EMIT_REMEMBERED_SET, |
| OMIT_SMI_CHECK); |
| const int function_list_offset = |
| Context::SlotOffset(Context::OPTIMIZED_FUNCTIONS_LIST); |
| __ Str(closure, |
| ContextMemOperand(native_context, Context::OPTIMIZED_FUNCTIONS_LIST)); |
| __ Mov(x5, closure); |
| __ RecordWriteContextSlot(native_context, function_list_offset, x5, x13, |
| kLRHasNotBeenSaved, kDontSaveFPRegs); |
| __ Jump(entry); |
| |
| __ Bind(&loop_bottom); |
| __ Sub(index, index, Operand(SharedFunctionInfo::kEntryLength)); |
| __ Cmp(index, Operand(1)); |
| __ B(gt, &loop_top); |
| |
| // We found neither literals nor code. |
| __ B(&gotta_call_runtime); |
| |
| __ Bind(&maybe_call_runtime); |
| |
| // Last possibility. Check the context free optimized code map entry. |
| __ Ldr(entry, FieldMemOperand(map, FixedArray::kHeaderSize + |
| SharedFunctionInfo::kSharedCodeIndex)); |
| __ Ldr(entry, FieldMemOperand(entry, WeakCell::kValueOffset)); |
| __ JumpIfSmi(entry, &try_shared); |
| |
| // Store code entry in the closure. |
| __ Add(entry, entry, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ B(&install_optimized_code_and_tailcall); |
| |
| __ Bind(&try_shared); |
| // Is the full code valid? |
| __ Ldr(entry, |
| FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(entry, FieldMemOperand(entry, SharedFunctionInfo::kCodeOffset)); |
| __ Ldr(x5, FieldMemOperand(entry, Code::kFlagsOffset)); |
| __ and_(x5, x5, Operand(Code::KindField::kMask)); |
| __ Mov(x5, Operand(x5, LSR, Code::KindField::kShift)); |
| __ Cmp(x5, Operand(Code::BUILTIN)); |
| __ B(eq, &gotta_call_runtime); |
| // Yes, install the full code. |
| __ Add(entry, entry, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ Str(entry, FieldMemOperand(closure, JSFunction::kCodeEntryOffset)); |
| __ RecordWriteCodeEntryField(closure, entry, x5); |
| __ Jump(entry); |
| |
| __ Bind(&gotta_call_runtime); |
| GenerateTailCallToReturnedCode(masm, Runtime::kCompileLazy); |
| } |
| |
| void Builtins::Generate_CompileBaseline(MacroAssembler* masm) { |
| GenerateTailCallToReturnedCode(masm, Runtime::kCompileBaseline); |
| } |
| |
| void Builtins::Generate_CompileOptimized(MacroAssembler* masm) { |
| GenerateTailCallToReturnedCode(masm, |
| Runtime::kCompileOptimized_NotConcurrent); |
| } |
| |
| void Builtins::Generate_CompileOptimizedConcurrent(MacroAssembler* masm) { |
| GenerateTailCallToReturnedCode(masm, Runtime::kCompileOptimized_Concurrent); |
| } |
| |
| void Builtins::Generate_InstantiateAsmJs(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argument count (preserved for callee) |
| // -- x1 : new target (preserved for callee) |
| // -- x3 : target function (preserved for callee) |
| // ----------------------------------- |
| Label failed; |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| // Push a copy of the target function and the new target. |
| __ SmiTag(x0); |
| // Push another copy as a parameter to the runtime call. |
| __ Push(x0, x1, x3, x1); |
| |
| // Copy arguments from caller (stdlib, foreign, heap). |
| for (int i = 2; i >= 0; --i) { |
| __ ldr(x4, MemOperand(fp, StandardFrameConstants::kCallerSPOffset + |
| i * kPointerSize)); |
| __ push(x4); |
| } |
| // Call runtime, on success unwind frame, and parent frame. |
| __ CallRuntime(Runtime::kInstantiateAsmJs, 4); |
| // A smi 0 is returned on failure, an object on success. |
| __ JumpIfSmi(x0, &failed); |
| scope.GenerateLeaveFrame(); |
| __ Drop(4); |
| __ Ret(); |
| |
| __ bind(&failed); |
| // Restore target function and new target. |
| __ Pop(x3, x1, x0); |
| __ SmiUntag(x0); |
| } |
| // On failure, tail call back to regular js. |
| GenerateTailCallToReturnedCode(masm, Runtime::kCompileLazy); |
| } |
| |
| static void GenerateMakeCodeYoungAgainCommon(MacroAssembler* masm) { |
| // For now, we are relying on the fact that make_code_young doesn't do any |
| // garbage collection which allows us to save/restore the registers without |
| // worrying about which of them contain pointers. We also don't build an |
| // internal frame to make the code fast, since we shouldn't have to do stack |
| // crawls in MakeCodeYoung. This seems a bit fragile. |
| |
| // The following caller-saved registers must be saved and restored when |
| // calling through to the runtime: |
| // x0 - The address from which to resume execution. |
| // x1 - isolate |
| // x3 - new target |
| // lr - The return address for the JSFunction itself. It has not yet been |
| // preserved on the stack because the frame setup code was replaced |
| // with a call to this stub, to handle code ageing. |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ Push(x0, x1, x3, fp, lr); |
| __ Mov(x1, ExternalReference::isolate_address(masm->isolate())); |
| __ CallCFunction( |
| ExternalReference::get_make_code_young_function(masm->isolate()), 2); |
| __ Pop(lr, fp, x3, x1, x0); |
| } |
| |
| // The calling function has been made young again, so return to execute the |
| // real frame set-up code. |
| __ Br(x0); |
| } |
| |
| #define DEFINE_CODE_AGE_BUILTIN_GENERATOR(C) \ |
| void Builtins::Generate_Make##C##CodeYoungAgainEvenMarking( \ |
| MacroAssembler* masm) { \ |
| GenerateMakeCodeYoungAgainCommon(masm); \ |
| } \ |
| void Builtins::Generate_Make##C##CodeYoungAgainOddMarking( \ |
| MacroAssembler* masm) { \ |
| GenerateMakeCodeYoungAgainCommon(masm); \ |
| } |
| CODE_AGE_LIST(DEFINE_CODE_AGE_BUILTIN_GENERATOR) |
| #undef DEFINE_CODE_AGE_BUILTIN_GENERATOR |
| |
| void Builtins::Generate_MarkCodeAsExecutedOnce(MacroAssembler* masm) { |
| // For now, as in GenerateMakeCodeYoungAgainCommon, we are relying on the fact |
| // that make_code_young doesn't do any garbage collection which allows us to |
| // save/restore the registers without worrying about which of them contain |
| // pointers. |
| |
| // The following caller-saved registers must be saved and restored when |
| // calling through to the runtime: |
| // x0 - The address from which to resume execution. |
| // x1 - isolate |
| // x3 - new target |
| // lr - The return address for the JSFunction itself. It has not yet been |
| // preserved on the stack because the frame setup code was replaced |
| // with a call to this stub, to handle code ageing. |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ Push(x0, x1, x3, fp, lr); |
| __ Mov(x1, ExternalReference::isolate_address(masm->isolate())); |
| __ CallCFunction( |
| ExternalReference::get_mark_code_as_executed_function(masm->isolate()), |
| 2); |
| __ Pop(lr, fp, x3, x1, x0); |
| |
| // Perform prologue operations usually performed by the young code stub. |
| __ EmitFrameSetupForCodeAgePatching(masm); |
| } |
| |
| // Jump to point after the code-age stub. |
| __ Add(x0, x0, kNoCodeAgeSequenceLength); |
| __ Br(x0); |
| } |
| |
| void Builtins::Generate_MarkCodeAsExecutedTwice(MacroAssembler* masm) { |
| GenerateMakeCodeYoungAgainCommon(masm); |
| } |
| |
| void Builtins::Generate_MarkCodeAsToBeExecutedOnce(MacroAssembler* masm) { |
| Generate_MarkCodeAsExecutedOnce(masm); |
| } |
| |
| static void Generate_NotifyStubFailureHelper(MacroAssembler* masm, |
| SaveFPRegsMode save_doubles) { |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| |
| // Preserve registers across notification, this is important for compiled |
| // stubs that tail call the runtime on deopts passing their parameters in |
| // registers. |
| // TODO(jbramley): Is it correct (and appropriate) to use safepoint |
| // registers here? According to the comment above, we should only need to |
| // preserve the registers with parameters. |
| __ PushXRegList(kSafepointSavedRegisters); |
| // Pass the function and deoptimization type to the runtime system. |
| __ CallRuntime(Runtime::kNotifyStubFailure, save_doubles); |
| __ PopXRegList(kSafepointSavedRegisters); |
| } |
| |
| // Ignore state (pushed by Deoptimizer::EntryGenerator::Generate). |
| __ Drop(1); |
| |
| // Jump to the miss handler. Deoptimizer::EntryGenerator::Generate loads this |
| // into lr before it jumps here. |
| __ Br(lr); |
| } |
| |
| void Builtins::Generate_NotifyStubFailure(MacroAssembler* masm) { |
| Generate_NotifyStubFailureHelper(masm, kDontSaveFPRegs); |
| } |
| |
| void Builtins::Generate_NotifyStubFailureSaveDoubles(MacroAssembler* masm) { |
| Generate_NotifyStubFailureHelper(masm, kSaveFPRegs); |
| } |
| |
| static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm, |
| Deoptimizer::BailoutType type) { |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| // Pass the deoptimization type to the runtime system. |
| __ Mov(x0, Smi::FromInt(static_cast<int>(type))); |
| __ Push(x0); |
| __ CallRuntime(Runtime::kNotifyDeoptimized); |
| } |
| |
| // Get the full codegen state from the stack and untag it. |
| Register state = x6; |
| __ Peek(state, 0); |
| __ SmiUntag(state); |
| |
| // Switch on the state. |
| Label with_tos_register, unknown_state; |
| __ CompareAndBranch(state, |
| static_cast<int>(Deoptimizer::BailoutState::NO_REGISTERS), |
| ne, &with_tos_register); |
| __ Drop(1); // Remove state. |
| __ Ret(); |
| |
| __ Bind(&with_tos_register); |
| // Reload TOS register. |
| DCHECK_EQ(kInterpreterAccumulatorRegister.code(), x0.code()); |
| __ Peek(x0, kPointerSize); |
| __ CompareAndBranch(state, |
| static_cast<int>(Deoptimizer::BailoutState::TOS_REGISTER), |
| ne, &unknown_state); |
| __ Drop(2); // Remove state and TOS. |
| __ Ret(); |
| |
| __ Bind(&unknown_state); |
| __ Abort(kInvalidFullCodegenState); |
| } |
| |
| void Builtins::Generate_NotifyDeoptimized(MacroAssembler* masm) { |
| Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::EAGER); |
| } |
| |
| void Builtins::Generate_NotifyLazyDeoptimized(MacroAssembler* masm) { |
| Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::LAZY); |
| } |
| |
| void Builtins::Generate_NotifySoftDeoptimized(MacroAssembler* masm) { |
| Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::SOFT); |
| } |
| |
| static void CompatibleReceiverCheck(MacroAssembler* masm, Register receiver, |
| Register function_template_info, |
| Register scratch0, Register scratch1, |
| Register scratch2, |
| Label* receiver_check_failed) { |
| Register signature = scratch0; |
| Register map = scratch1; |
| Register constructor = scratch2; |
| |
| // If there is no signature, return the holder. |
| __ Ldr(signature, FieldMemOperand(function_template_info, |
| FunctionTemplateInfo::kSignatureOffset)); |
| __ CompareRoot(signature, Heap::kUndefinedValueRootIndex); |
| Label receiver_check_passed; |
| __ B(eq, &receiver_check_passed); |
| |
| // Walk the prototype chain. |
| __ Ldr(map, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| Label prototype_loop_start; |
| __ Bind(&prototype_loop_start); |
| |
| // Get the constructor, if any |
| __ GetMapConstructor(constructor, map, x16, x16); |
| __ cmp(x16, Operand(JS_FUNCTION_TYPE)); |
| Label next_prototype; |
| __ B(ne, &next_prototype); |
| Register type = constructor; |
| __ Ldr(type, |
| FieldMemOperand(constructor, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(type, FieldMemOperand(type, SharedFunctionInfo::kFunctionDataOffset)); |
| |
| // Loop through the chain of inheriting function templates. |
| Label function_template_loop; |
| __ Bind(&function_template_loop); |
| |
| // If the signatures match, we have a compatible receiver. |
| __ Cmp(signature, type); |
| __ B(eq, &receiver_check_passed); |
| |
| // If the current type is not a FunctionTemplateInfo, load the next prototype |
| // in the chain. |
| __ JumpIfSmi(type, &next_prototype); |
| __ CompareObjectType(type, x16, x17, FUNCTION_TEMPLATE_INFO_TYPE); |
| __ B(ne, &next_prototype); |
| |
| // Otherwise load the parent function template and iterate. |
| __ Ldr(type, |
| FieldMemOperand(type, FunctionTemplateInfo::kParentTemplateOffset)); |
| __ B(&function_template_loop); |
| |
| // Load the next prototype. |
| __ Bind(&next_prototype); |
| __ Ldr(x16, FieldMemOperand(map, Map::kBitField3Offset)); |
| __ Tst(x16, Operand(Map::HasHiddenPrototype::kMask)); |
| __ B(eq, receiver_check_failed); |
| __ Ldr(receiver, FieldMemOperand(map, Map::kPrototypeOffset)); |
| __ Ldr(map, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| // Iterate. |
| __ B(&prototype_loop_start); |
| |
| __ Bind(&receiver_check_passed); |
| } |
| |
| void Builtins::Generate_HandleFastApiCall(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments excluding receiver |
| // -- x1 : callee |
| // -- lr : return address |
| // -- sp[0] : last argument |
| // -- ... |
| // -- sp[8 * (argc - 1)] : first argument |
| // -- sp[8 * argc] : receiver |
| // ----------------------------------- |
| |
| // Load the FunctionTemplateInfo. |
| __ Ldr(x3, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(x3, FieldMemOperand(x3, SharedFunctionInfo::kFunctionDataOffset)); |
| |
| // Do the compatible receiver check. |
| Label receiver_check_failed; |
| __ Ldr(x2, MemOperand(jssp, x0, LSL, kPointerSizeLog2)); |
| CompatibleReceiverCheck(masm, x2, x3, x4, x5, x6, &receiver_check_failed); |
| |
| // Get the callback offset from the FunctionTemplateInfo, and jump to the |
| // beginning of the code. |
| __ Ldr(x4, FieldMemOperand(x3, FunctionTemplateInfo::kCallCodeOffset)); |
| __ Ldr(x4, FieldMemOperand(x4, CallHandlerInfo::kFastHandlerOffset)); |
| __ Add(x4, x4, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ Jump(x4); |
| |
| // Compatible receiver check failed: throw an Illegal Invocation exception. |
| __ Bind(&receiver_check_failed); |
| // Drop the arguments (including the receiver) |
| __ add(x0, x0, Operand(1)); |
| __ Drop(x0); |
| __ TailCallRuntime(Runtime::kThrowIllegalInvocation); |
| } |
| |
| static void Generate_OnStackReplacementHelper(MacroAssembler* masm, |
| bool has_handler_frame) { |
| // Lookup the function in the JavaScript frame. |
| if (has_handler_frame) { |
| __ Ldr(x0, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| __ Ldr(x0, MemOperand(x0, JavaScriptFrameConstants::kFunctionOffset)); |
| } else { |
| __ Ldr(x0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| } |
| |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| // Pass function as argument. |
| __ Push(x0); |
| __ CallRuntime(Runtime::kCompileForOnStackReplacement); |
| } |
| |
| // If the code object is null, just return to the caller. |
| Label skip; |
| __ CompareAndBranch(x0, Smi::FromInt(0), ne, &skip); |
| __ Ret(); |
| |
| __ Bind(&skip); |
| |
| // Drop any potential handler frame that is be sitting on top of the actual |
| // JavaScript frame. This is the case then OSR is triggered from bytecode. |
| if (has_handler_frame) { |
| __ LeaveFrame(StackFrame::STUB); |
| } |
| |
| // Load deoptimization data from the code object. |
| // <deopt_data> = <code>[#deoptimization_data_offset] |
| __ Ldr(x1, MemOperand(x0, Code::kDeoptimizationDataOffset - kHeapObjectTag)); |
| |
| // Load the OSR entrypoint offset from the deoptimization data. |
| // <osr_offset> = <deopt_data>[#header_size + #osr_pc_offset] |
| __ Ldrsw(w1, UntagSmiFieldMemOperand( |
| x1, FixedArray::OffsetOfElementAt( |
| DeoptimizationInputData::kOsrPcOffsetIndex))); |
| |
| // Compute the target address = code_obj + header_size + osr_offset |
| // <entry_addr> = <code_obj> + #header_size + <osr_offset> |
| __ Add(x0, x0, x1); |
| __ Add(lr, x0, Code::kHeaderSize - kHeapObjectTag); |
| |
| // And "return" to the OSR entry point of the function. |
| __ Ret(); |
| } |
| |
| void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) { |
| Generate_OnStackReplacementHelper(masm, false); |
| } |
| |
| void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) { |
| Generate_OnStackReplacementHelper(masm, true); |
| } |
| |
| // static |
| void Builtins::Generate_DatePrototype_GetField(MacroAssembler* masm, |
| int field_index) { |
| // ----------- S t a t e ------------- |
| // -- x0 : number of arguments |
| // -- x1 : function |
| // -- cp : context |
| // -- lr : return address |
| // -- jssp[0] : receiver |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_DatePrototype_GetField"); |
| |
| // 1. Pop receiver into x0 and check that it's actually a JSDate object. |
| Label receiver_not_date; |
| { |
| __ Pop(x0); |
| __ JumpIfSmi(x0, &receiver_not_date); |
| __ JumpIfNotObjectType(x0, x2, x3, JS_DATE_TYPE, &receiver_not_date); |
| } |
| |
| // 2. Load the specified date field, falling back to the runtime as necessary. |
| if (field_index == JSDate::kDateValue) { |
| __ Ldr(x0, FieldMemOperand(x0, JSDate::kValueOffset)); |
| } else { |
| if (field_index < JSDate::kFirstUncachedField) { |
| Label stamp_mismatch; |
| __ Mov(x1, ExternalReference::date_cache_stamp(masm->isolate())); |
| __ Ldr(x1, MemOperand(x1)); |
| __ Ldr(x2, FieldMemOperand(x0, JSDate::kCacheStampOffset)); |
| __ Cmp(x1, x2); |
| __ B(ne, &stamp_mismatch); |
| __ Ldr(x0, FieldMemOperand( |
| x0, JSDate::kValueOffset + field_index * kPointerSize)); |
| __ Ret(); |
| __ Bind(&stamp_mismatch); |
| } |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ Mov(x1, Smi::FromInt(field_index)); |
| __ CallCFunction( |
| ExternalReference::get_date_field_function(masm->isolate()), 2); |
| } |
| __ Ret(); |
| |
| // 3. Raise a TypeError if the receiver is not a date. |
| __ Bind(&receiver_not_date); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ Push(x0); |
| __ Mov(x0, Smi::FromInt(0)); |
| __ EnterBuiltinFrame(cp, x1, x0); |
| __ CallRuntime(Runtime::kThrowNotDateError); |
| } |
| } |
| |
| // static |
| void Builtins::Generate_FunctionPrototypeApply(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argc |
| // -- jssp[0] : argArray (if argc == 2) |
| // -- jssp[8] : thisArg (if argc >= 1) |
| // -- jssp[16] : receiver |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_FunctionPrototypeApply"); |
| |
| Register argc = x0; |
| Register arg_array = x0; |
| Register receiver = x1; |
| Register this_arg = x2; |
| Register undefined_value = x3; |
| Register null_value = x4; |
| |
| __ LoadRoot(undefined_value, Heap::kUndefinedValueRootIndex); |
| __ LoadRoot(null_value, Heap::kNullValueRootIndex); |
| |
| // 1. Load receiver into x1, argArray into x0 (if present), remove all |
| // arguments from the stack (including the receiver), and push thisArg (if |
| // present) instead. |
| { |
| // Claim (2 - argc) dummy arguments from the stack, to put the stack in a |
| // consistent state for a simple pop operation. |
| __ Claim(2); |
| __ Drop(argc); |
| |
| // ----------- S t a t e ------------- |
| // -- x0 : argc |
| // -- jssp[0] : argArray (dummy value if argc <= 1) |
| // -- jssp[8] : thisArg (dummy value if argc == 0) |
| // -- jssp[16] : receiver |
| // ----------------------------------- |
| __ Cmp(argc, 1); |
| __ Pop(arg_array, this_arg); // Overwrites argc. |
| __ CmovX(this_arg, undefined_value, lo); // undefined if argc == 0. |
| __ CmovX(arg_array, undefined_value, ls); // undefined if argc <= 1. |
| |
| __ Peek(receiver, 0); |
| __ Poke(this_arg, 0); |
| } |
| |
| // ----------- S t a t e ------------- |
| // -- x0 : argArray |
| // -- x1 : receiver |
| // -- x3 : undefined root value |
| // -- jssp[0] : thisArg |
| // ----------------------------------- |
| |
| // 2. Make sure the receiver is actually callable. |
| Label receiver_not_callable; |
| __ JumpIfSmi(receiver, &receiver_not_callable); |
| __ Ldr(x10, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| __ Ldrb(w10, FieldMemOperand(x10, Map::kBitFieldOffset)); |
| __ TestAndBranchIfAllClear(x10, 1 << Map::kIsCallable, |
| &receiver_not_callable); |
| |
| // 3. Tail call with no arguments if argArray is null or undefined. |
| Label no_arguments; |
| __ Cmp(arg_array, null_value); |
| __ Ccmp(arg_array, undefined_value, ZFlag, ne); |
| __ B(eq, &no_arguments); |
| |
| // 4a. Apply the receiver to the given argArray (passing undefined for |
| // new.target in x3). |
| DCHECK(undefined_value.Is(x3)); |
| __ Jump(masm->isolate()->builtins()->Apply(), RelocInfo::CODE_TARGET); |
| |
| // 4b. The argArray is either null or undefined, so we tail call without any |
| // arguments to the receiver. |
| __ Bind(&no_arguments); |
| { |
| __ Mov(x0, 0); |
| DCHECK(receiver.Is(x1)); |
| __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET); |
| } |
| |
| // 4c. The receiver is not callable, throw an appropriate TypeError. |
| __ Bind(&receiver_not_callable); |
| { |
| __ Poke(receiver, 0); |
| __ TailCallRuntime(Runtime::kThrowApplyNonFunction); |
| } |
| } |
| |
| // static |
| void Builtins::Generate_FunctionPrototypeCall(MacroAssembler* masm) { |
| Register argc = x0; |
| Register function = x1; |
| Register scratch1 = x10; |
| Register scratch2 = x11; |
| |
| ASM_LOCATION("Builtins::Generate_FunctionPrototypeCall"); |
| |
| // 1. Make sure we have at least one argument. |
| { |
| Label done; |
| __ Cbnz(argc, &done); |
| __ LoadRoot(scratch1, Heap::kUndefinedValueRootIndex); |
| __ Push(scratch1); |
| __ Mov(argc, 1); |
| __ Bind(&done); |
| } |
| |
| // 2. Get the callable to call (passed as receiver) from the stack. |
| __ Peek(function, Operand(argc, LSL, kXRegSizeLog2)); |
| |
| // 3. Shift arguments and return address one slot down on the stack |
| // (overwriting the original receiver). Adjust argument count to make |
| // the original first argument the new receiver. |
| { |
| Label loop; |
| // Calculate the copy start address (destination). Copy end address is jssp. |
| __ Add(scratch2, jssp, Operand(argc, LSL, kPointerSizeLog2)); |
| __ Sub(scratch1, scratch2, kPointerSize); |
| |
| __ Bind(&loop); |
| __ Ldr(x12, MemOperand(scratch1, -kPointerSize, PostIndex)); |
| __ Str(x12, MemOperand(scratch2, -kPointerSize, PostIndex)); |
| __ Cmp(scratch1, jssp); |
| __ B(ge, &loop); |
| // Adjust the actual number of arguments and remove the top element |
| // (which is a copy of the last argument). |
| __ Sub(argc, argc, 1); |
| __ Drop(1); |
| } |
| |
| // 4. Call the callable. |
| __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET); |
| } |
| |
| void Builtins::Generate_ReflectApply(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argc |
| // -- jssp[0] : argumentsList (if argc == 3) |
| // -- jssp[8] : thisArgument (if argc >= 2) |
| // -- jssp[16] : target (if argc >= 1) |
| // -- jssp[24] : receiver |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_ReflectApply"); |
| |
| Register argc = x0; |
| Register arguments_list = x0; |
| Register target = x1; |
| Register this_argument = x2; |
| Register undefined_value = x3; |
| |
| __ LoadRoot(undefined_value, Heap::kUndefinedValueRootIndex); |
| |
| // 1. Load target into x1 (if present), argumentsList into x0 (if present), |
| // remove all arguments from the stack (including the receiver), and push |
| // thisArgument (if present) instead. |
| { |
| // Claim (3 - argc) dummy arguments from the stack, to put the stack in a |
| // consistent state for a simple pop operation. |
| __ Claim(3); |
| __ Drop(argc); |
| |
| // ----------- S t a t e ------------- |
| // -- x0 : argc |
| // -- jssp[0] : argumentsList (dummy value if argc <= 2) |
| // -- jssp[8] : thisArgument (dummy value if argc <= 1) |
| // -- jssp[16] : target (dummy value if argc == 0) |
| // -- jssp[24] : receiver |
| // ----------------------------------- |
| __ Adds(x10, argc, 0); // Preserve argc, and set the Z flag if it is zero. |
| __ Pop(arguments_list, this_argument, target); // Overwrites argc. |
| __ CmovX(target, undefined_value, eq); // undefined if argc == 0. |
| __ Cmp(x10, 2); |
| __ CmovX(this_argument, undefined_value, lo); // undefined if argc <= 1. |
| __ CmovX(arguments_list, undefined_value, ls); // undefined if argc <= 2. |
| |
| __ Poke(this_argument, 0); // Overwrite receiver. |
| } |
| |
| // ----------- S t a t e ------------- |
| // -- x0 : argumentsList |
| // -- x1 : target |
| // -- jssp[0] : thisArgument |
| // ----------------------------------- |
| |
| // 2. Make sure the target is actually callable. |
| Label target_not_callable; |
| __ JumpIfSmi(target, &target_not_callable); |
| __ Ldr(x10, FieldMemOperand(target, HeapObject::kMapOffset)); |
| __ Ldr(x10, FieldMemOperand(x10, Map::kBitFieldOffset)); |
| __ TestAndBranchIfAllClear(x10, 1 << Map::kIsCallable, &target_not_callable); |
| |
| // 3a. Apply the target to the given argumentsList (passing undefined for |
| // new.target in x3). |
| DCHECK(undefined_value.Is(x3)); |
| __ Jump(masm->isolate()->builtins()->Apply(), RelocInfo::CODE_TARGET); |
| |
| // 3b. The target is not callable, throw an appropriate TypeError. |
| __ Bind(&target_not_callable); |
| { |
| __ Poke(target, 0); |
| __ TailCallRuntime(Runtime::kThrowApplyNonFunction); |
| } |
| } |
| |
| void Builtins::Generate_ReflectConstruct(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argc |
| // -- jssp[0] : new.target (optional) |
| // -- jssp[8] : argumentsList |
| // -- jssp[16] : target |
| // -- jssp[24] : receiver |
| // ----------------------------------- |
| ASM_LOCATION("Builtins::Generate_ReflectConstruct"); |
| |
| Register argc = x0; |
| Register arguments_list = x0; |
| Register target = x1; |
| Register new_target = x3; |
| Register undefined_value = x4; |
| |
| __ LoadRoot(undefined_value, Heap::kUndefinedValueRootIndex); |
| |
| // 1. Load target into x1 (if present), argumentsList into x0 (if present), |
| // new.target into x3 (if present, otherwise use target), remove all |
| // arguments from the stack (including the receiver), and push thisArgument |
| // (if present) instead. |
| { |
| // Claim (3 - argc) dummy arguments from the stack, to put the stack in a |
| // consistent state for a simple pop operation. |
| __ Claim(3); |
| __ Drop(argc); |
| |
| // ----------- S t a t e ------------- |
| // -- x0 : argc |
| // -- jssp[0] : new.target (dummy value if argc <= 2) |
| // -- jssp[8] : argumentsList (dummy value if argc <= 1) |
| // -- jssp[16] : target (dummy value if argc == 0) |
| // -- jssp[24] : receiver |
| // ----------------------------------- |
| __ Adds(x10, argc, 0); // Preserve argc, and set the Z flag if it is zero. |
| __ Pop(new_target, arguments_list, target); // Overwrites argc. |
| __ CmovX(target, undefined_value, eq); // undefined if argc == 0. |
| __ Cmp(x10, 2); |
| __ CmovX(arguments_list, undefined_value, lo); // undefined if argc <= 1. |
| __ CmovX(new_target, target, ls); // target if argc <= 2. |
| |
| __ Poke(undefined_value, 0); // Overwrite receiver. |
| } |
| |
| // ----------- S t a t e ------------- |
| // -- x0 : argumentsList |
| // -- x1 : target |
| // -- x3 : new.target |
| // -- jssp[0] : receiver (undefined) |
| // ----------------------------------- |
| |
| // 2. Make sure the target is actually a constructor. |
| Label target_not_constructor; |
| __ JumpIfSmi(target, &target_not_constructor); |
| __ Ldr(x10, FieldMemOperand(target, HeapObject::kMapOffset)); |
| __ Ldrb(x10, FieldMemOperand(x10, Map::kBitFieldOffset)); |
| __ TestAndBranchIfAllClear(x10, 1 << Map::kIsConstructor, |
| &target_not_constructor); |
| |
| // 3. Make sure the new.target is actually a constructor. |
| Label new_target_not_constructor; |
| __ JumpIfSmi(new_target, &new_target_not_constructor); |
| __ Ldr(x10, FieldMemOperand(new_target, HeapObject::kMapOffset)); |
| __ Ldrb(x10, FieldMemOperand(x10, Map::kBitFieldOffset)); |
| __ TestAndBranchIfAllClear(x10, 1 << Map::kIsConstructor, |
| &new_target_not_constructor); |
| |
| // 4a. Construct the target with the given new.target and argumentsList. |
| __ Jump(masm->isolate()->builtins()->Apply(), RelocInfo::CODE_TARGET); |
| |
| // 4b. The target is not a constructor, throw an appropriate TypeError. |
| __ Bind(&target_not_constructor); |
| { |
| __ Poke(target, 0); |
| __ TailCallRuntime(Runtime::kThrowCalledNonCallable); |
| } |
| |
| // 4c. The new.target is not a constructor, throw an appropriate TypeError. |
| __ Bind(&new_target_not_constructor); |
| { |
| __ Poke(new_target, 0); |
| __ TailCallRuntime(Runtime::kThrowCalledNonCallable); |
| } |
| } |
| |
| static void ArgumentAdaptorStackCheck(MacroAssembler* masm, |
| Label* stack_overflow) { |
| // ----------- S t a t e ------------- |
| // -- x0 : actual number of arguments |
| // -- x1 : function (passed through to callee) |
| // -- x2 : expected number of arguments |
| // -- x3 : new target (passed through to callee) |
| // ----------------------------------- |
| // Check the stack for overflow. |
| // We are not trying to catch interruptions (e.g. debug break and |
| // preemption) here, so the "real stack limit" is checked. |
| Label enough_stack_space; |
| __ LoadRoot(x10, Heap::kRealStackLimitRootIndex); |
| // Make x10 the space we have left. The stack might already be overflowed |
| // here which will cause x10 to become negative. |
| __ Sub(x10, jssp, x10); |
| // Check if the arguments will overflow the stack. |
| __ Cmp(x10, Operand(x2, LSL, kPointerSizeLog2)); |
| __ B(le, stack_overflow); |
| } |
| |
| static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) { |
| __ SmiTag(x10, x0); |
| __ Mov(x11, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)); |
| __ Push(lr, fp); |
| __ Push(x11, x1, x10); |
| __ Add(fp, jssp, |
| StandardFrameConstants::kFixedFrameSizeFromFp + kPointerSize); |
| } |
| |
| static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : result being passed through |
| // ----------------------------------- |
| // Get the number of arguments passed (as a smi), tear down the frame and |
| // then drop the parameters and the receiver. |
| __ Ldr(x10, MemOperand(fp, -(StandardFrameConstants::kFixedFrameSizeFromFp + |
| kPointerSize))); |
| __ Mov(jssp, fp); |
| __ Pop(fp, lr); |
| __ DropBySMI(x10, kXRegSize); |
| __ Drop(1); |
| } |
| |
| // static |
| void Builtins::Generate_Apply(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : argumentsList |
| // -- x1 : target |
| // -- x3 : new.target (checked to be constructor or undefined) |
| // -- jssp[0] : thisArgument |
| // ----------------------------------- |
| |
| Register arguments_list = x0; |
| Register target = x1; |
| Register new_target = x3; |
| |
| Register args = x0; |
| Register len = x2; |
| |
| // Create the list of arguments from the array-like argumentsList. |
| { |
| Label create_arguments, create_array, create_runtime, done_create; |
| __ JumpIfSmi(arguments_list, &create_runtime); |
| |
| // Load native context. |
| Register native_context = x4; |
| __ Ldr(native_context, NativeContextMemOperand()); |
| |
| // Load the map of argumentsList. |
| Register arguments_list_map = x2; |
| __ Ldr(arguments_list_map, |
| FieldMemOperand(arguments_list, HeapObject::kMapOffset)); |
| |
| // Check if argumentsList is an (unmodified) arguments object. |
| __ Ldr(x10, ContextMemOperand(native_context, |
| Context::SLOPPY_ARGUMENTS_MAP_INDEX)); |
| __ Ldr(x11, ContextMemOperand(native_context, |
| Context::STRICT_ARGUMENTS_MAP_INDEX)); |
| __ Cmp(arguments_list_map, x10); |
| __ Ccmp(arguments_list_map, x11, ZFlag, ne); |
| __ B(eq, &create_arguments); |
| |
| // Check if argumentsList is a fast JSArray. |
| __ CompareInstanceType(arguments_list_map, native_context, JS_ARRAY_TYPE); |
| __ B(eq, &create_array); |
| |
| // Ask the runtime to create the list (actually a FixedArray). |
| __ Bind(&create_runtime); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ Push(target, new_target, arguments_list); |
| __ CallRuntime(Runtime::kCreateListFromArrayLike); |
| __ Pop(new_target, target); |
| __ Ldrsw(len, UntagSmiFieldMemOperand(arguments_list, |
| FixedArray::kLengthOffset)); |
| } |
| __ B(&done_create); |
| |
| // Try to create the list from an arguments object. |
| __ Bind(&create_arguments); |
| __ Ldrsw(len, UntagSmiFieldMemOperand(arguments_list, |
| JSArgumentsObject::kLengthOffset)); |
| __ Ldr(x10, FieldMemOperand(arguments_list, JSObject::kElementsOffset)); |
| __ Ldrsw(x11, UntagSmiFieldMemOperand(x10, FixedArray::kLengthOffset)); |
| __ CompareAndBranch(len, x11, ne, &create_runtime); |
| __ Mov(args, x10); |
| __ B(&done_create); |
| |
| // Try to create the list from a JSArray object. |
| __ Bind(&create_array); |
| __ Ldr(x10, FieldMemOperand(arguments_list_map, Map::kBitField2Offset)); |
| __ DecodeField<Map::ElementsKindBits>(x10); |
| STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| STATIC_ASSERT(FAST_ELEMENTS == 2); |
| // Branch for anything that's not FAST_{SMI_}ELEMENTS. |
| __ TestAndBranchIfAnySet(x10, ~FAST_ELEMENTS, &create_runtime); |
| __ Ldrsw(len, |
| UntagSmiFieldMemOperand(arguments_list, JSArray::kLengthOffset)); |
| __ Ldr(args, FieldMemOperand(arguments_list, JSArray::kElementsOffset)); |
| |
| __ Bind(&done_create); |
| } |
| |
| // Check for stack overflow. |
| { |
| // Check the stack for overflow. We are not trying to catch interruptions |
| // (i.e. debug break and preemption) here, so check the "real stack limit". |
| Label done; |
| __ LoadRoot(x10, Heap::kRealStackLimitRootIndex); |
| // Make x10 the space we have left. The stack might already be overflowed |
| // here which will cause x10 to become negative. |
| __ Sub(x10, masm->StackPointer(), x10); |
| // Check if the arguments will overflow the stack. |
| __ Cmp(x10, Operand(len, LSL, kPointerSizeLog2)); |
| __ B(gt, &done); // Signed comparison. |
| __ TailCallRuntime(Runtime::kThrowStackOverflow); |
| __ Bind(&done); |
| } |
| |
| // ----------- S t a t e ------------- |
| // -- x0 : args (a FixedArray built from argumentsList) |
| // -- x1 : target |
| // -- x2 : len (number of elements to push from args) |
| // -- x3 : new.target (checked to be constructor or undefined) |
| // -- jssp[0] : thisArgument |
| // ----------------------------------- |
| |
| // Push arguments onto the stack (thisArgument is already on the stack). |
| { |
| Label done, loop; |
| Register src = x4; |
| |
| __ Add(src, args, FixedArray::kHeaderSize - kHeapObjectTag); |
| __ Mov(x0, len); // The 'len' argument for Call() or Construct(). |
| __ Cbz(len, &done); |
| __ Claim(len); |
| __ Bind(&loop); |
| __ Sub(len, len, 1); |
| __ Ldr(x10, MemOperand(src, kPointerSize, PostIndex)); |
| __ Poke(x10, Operand(len, LSL, kPointerSizeLog2)); |
| __ Cbnz(len, &loop); |
| __ Bind(&done); |
| } |
| |
| // ----------- S t a t e ------------- |
| // -- x0 : argument count (len) |
| // -- x1 : target |
| // -- x3 : new.target (checked to be constructor or undefined) |
| // -- jssp[0] : args[len-1] |
| // -- jssp[8] : args[len-2] |
| // ... : ... |
| // -- jssp[8*(len-2)] : args[1] |
| // -- jssp[8*(len-1)] : args[0] |
| // ----------------------------------- |
| |
| // Dispatch to Call or Construct depending on whether new.target is undefined. |
| { |
| __ CompareRoot(new_target, Heap::kUndefinedValueRootIndex); |
| __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET, eq); |
| __ Jump(masm->isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET); |
| } |
| } |
| |
| namespace { |
| |
| // Drops top JavaScript frame and an arguments adaptor frame below it (if |
| // present) preserving all the arguments prepared for current call. |
| // Does nothing if debugger is currently active. |
| // ES6 14.6.3. PrepareForTailCall |
| // |
| // Stack structure for the function g() tail calling f(): |
| // |
| // ------- Caller frame: ------- |
| // | ... |
| // | g()'s arg M |
| // | ... |
| // | g()'s arg 1 |
| // | g()'s receiver arg |
| // | g()'s caller pc |
| // ------- g()'s frame: ------- |
| // | g()'s caller fp <- fp |
| // | g()'s context |
| // | function pointer: g |
| // | ------------------------- |
| // | ... |
| // | ... |
| // | f()'s arg N |
| // | ... |
| // | f()'s arg 1 |
| // | f()'s receiver arg <- sp (f()'s caller pc is not on the stack yet!) |
| // ---------------------- |
| // |
| void PrepareForTailCall(MacroAssembler* masm, Register args_reg, |
| Register scratch1, Register scratch2, |
| Register scratch3) { |
| DCHECK(!AreAliased(args_reg, scratch1, scratch2, scratch3)); |
| Comment cmnt(masm, "[ PrepareForTailCall"); |
| |
| // Prepare for tail call only if ES2015 tail call elimination is enabled. |
| Label done; |
| ExternalReference is_tail_call_elimination_enabled = |
| ExternalReference::is_tail_call_elimination_enabled_address( |
| masm->isolate()); |
| __ Mov(scratch1, Operand(is_tail_call_elimination_enabled)); |
| __ Ldrb(scratch1, MemOperand(scratch1)); |
| __ Cmp(scratch1, Operand(0)); |
| __ B(eq, &done); |
| |
| // Drop possible interpreter handler/stub frame. |
| { |
| Label no_interpreter_frame; |
| __ Ldr(scratch3, |
| MemOperand(fp, CommonFrameConstants::kContextOrFrameTypeOffset)); |
| __ Cmp(scratch3, Operand(Smi::FromInt(StackFrame::STUB))); |
| __ B(ne, &no_interpreter_frame); |
| __ Ldr(fp, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| __ bind(&no_interpreter_frame); |
| } |
| |
| // Check if next frame is an arguments adaptor frame. |
| Register caller_args_count_reg = scratch1; |
| Label no_arguments_adaptor, formal_parameter_count_loaded; |
| __ Ldr(scratch2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| __ Ldr(scratch3, |
| MemOperand(scratch2, CommonFrameConstants::kContextOrFrameTypeOffset)); |
| __ Cmp(scratch3, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| __ B(ne, &no_arguments_adaptor); |
| |
| // Drop current frame and load arguments count from arguments adaptor frame. |
| __ mov(fp, scratch2); |
| __ Ldr(caller_args_count_reg, |
| MemOperand(fp, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| __ SmiUntag(caller_args_count_reg); |
| __ B(&formal_parameter_count_loaded); |
| |
| __ bind(&no_arguments_adaptor); |
| // Load caller's formal parameter count |
| __ Ldr(scratch1, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
| __ Ldr(scratch1, |
| FieldMemOperand(scratch1, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldrsw(caller_args_count_reg, |
| FieldMemOperand(scratch1, |
| SharedFunctionInfo::kFormalParameterCountOffset)); |
| __ bind(&formal_parameter_count_loaded); |
| |
| ParameterCount callee_args_count(args_reg); |
| __ PrepareForTailCall(callee_args_count, caller_args_count_reg, scratch2, |
| scratch3); |
| __ bind(&done); |
| } |
| } // namespace |
| |
| // static |
| void Builtins::Generate_CallFunction(MacroAssembler* masm, |
| ConvertReceiverMode mode, |
| TailCallMode tail_call_mode) { |
| ASM_LOCATION("Builtins::Generate_CallFunction"); |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : the function to call (checked to be a JSFunction) |
| // ----------------------------------- |
| __ AssertFunction(x1); |
| |
| // See ES6 section 9.2.1 [[Call]] ( thisArgument, argumentsList) |
| // Check that function is not a "classConstructor". |
| Label class_constructor; |
| __ Ldr(x2, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
| __ Ldr(w3, FieldMemOperand(x2, SharedFunctionInfo::kCompilerHintsOffset)); |
| __ TestAndBranchIfAnySet( |
| w3, (1 << SharedFunctionInfo::kIsDefaultConstructor) | |
| (1 << SharedFunctionInfo::kIsSubclassConstructor) | |
| (1 << SharedFunctionInfo::kIsBaseConstructor), |
| &class_constructor); |
| |
| // Enter the context of the function; ToObject has to run in the function |
| // context, and we also need to take the global proxy from the function |
| // context in case of conversion. |
| __ Ldr(cp, FieldMemOperand(x1, JSFunction::kContextOffset)); |
| // We need to convert the receiver for non-native sloppy mode functions. |
| Label done_convert; |
| __ TestAndBranchIfAnySet(w3, |
| (1 << SharedFunctionInfo::kNative) | |
| (1 << SharedFunctionInfo::kStrictModeFunction), |
| &done_convert); |
| { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : the function to call (checked to be a JSFunction) |
| // -- x2 : the shared function info. |
| // -- cp : the function context. |
| // ----------------------------------- |
| |
| if (mode == ConvertReceiverMode::kNullOrUndefined) { |
| // Patch receiver to global proxy. |
| __ LoadGlobalProxy(x3); |
| } else { |
| Label convert_to_object, convert_receiver; |
| __ Peek(x3, Operand(x0, LSL, kXRegSizeLog2)); |
| __ JumpIfSmi(x3, &convert_to_object); |
| STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE); |
| __ CompareObjectType(x3, x4, x4, FIRST_JS_RECEIVER_TYPE); |
| __ B(hs, &done_convert); |
| if (mode != ConvertReceiverMode::kNotNullOrUndefined) { |
| Label convert_global_proxy; |
| __ JumpIfRoot(x3, Heap::kUndefinedValueRootIndex, |
| &convert_global_proxy); |
| __ JumpIfNotRoot(x3, Heap::kNullValueRootIndex, &convert_to_object); |
| __ Bind(&convert_global_proxy); |
| { |
| // Patch receiver to global proxy. |
| __ LoadGlobalProxy(x3); |
| } |
| __ B(&convert_receiver); |
| } |
| __ Bind(&convert_to_object); |
| { |
| // Convert receiver using ToObject. |
| // TODO(bmeurer): Inline the allocation here to avoid building the frame |
| // in the fast case? (fall back to AllocateInNewSpace?) |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ SmiTag(x0); |
| __ Push(x0, x1); |
| __ Mov(x0, x3); |
| ToObjectStub stub(masm->isolate()); |
| __ CallStub(&stub); |
| __ Mov(x3, x0); |
| __ Pop(x1, x0); |
| __ SmiUntag(x0); |
| } |
| __ Ldr(x2, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
| __ Bind(&convert_receiver); |
| } |
| __ Poke(x3, Operand(x0, LSL, kXRegSizeLog2)); |
| } |
| __ Bind(&done_convert); |
| |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : the function to call (checked to be a JSFunction) |
| // -- x2 : the shared function info. |
| // -- cp : the function context. |
| // ----------------------------------- |
| |
| if (tail_call_mode == TailCallMode::kAllow) { |
| PrepareForTailCall(masm, x0, x3, x4, x5); |
| } |
| |
| __ Ldrsw( |
| x2, FieldMemOperand(x2, SharedFunctionInfo::kFormalParameterCountOffset)); |
| ParameterCount actual(x0); |
| ParameterCount expected(x2); |
| __ InvokeFunctionCode(x1, no_reg, expected, actual, JUMP_FUNCTION, |
| CheckDebugStepCallWrapper()); |
| |
| // The function is a "classConstructor", need to raise an exception. |
| __ bind(&class_constructor); |
| { |
| FrameScope frame(masm, StackFrame::INTERNAL); |
| __ Push(x1); |
| __ CallRuntime(Runtime::kThrowConstructorNonCallableError); |
| } |
| } |
| |
| namespace { |
| |
| void Generate_PushBoundArguments(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : target (checked to be a JSBoundFunction) |
| // -- x3 : new.target (only in case of [[Construct]]) |
| // ----------------------------------- |
| |
| // Load [[BoundArguments]] into x2 and length of that into x4. |
| Label no_bound_arguments; |
| __ Ldr(x2, FieldMemOperand(x1, JSBoundFunction::kBoundArgumentsOffset)); |
| __ Ldrsw(x4, UntagSmiFieldMemOperand(x2, FixedArray::kLengthOffset)); |
| __ Cmp(x4, 0); |
| __ B(eq, &no_bound_arguments); |
| { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : target (checked to be a JSBoundFunction) |
| // -- x2 : the [[BoundArguments]] (implemented as FixedArray) |
| // -- x3 : new.target (only in case of [[Construct]]) |
| // -- x4 : the number of [[BoundArguments]] |
| // ----------------------------------- |
| |
| // Reserve stack space for the [[BoundArguments]]. |
| { |
| Label done; |
| __ Claim(x4); |
| // Check the stack for overflow. We are not trying to catch interruptions |
| // (i.e. debug break and preemption) here, so check the "real stack |
| // limit". |
| __ CompareRoot(jssp, Heap::kRealStackLimitRootIndex); |
| __ B(gt, &done); // Signed comparison. |
| // Restore the stack pointer. |
| __ Drop(x4); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ EnterFrame(StackFrame::INTERNAL); |
| __ CallRuntime(Runtime::kThrowStackOverflow); |
| } |
| __ Bind(&done); |
| } |
| |
| // Relocate arguments down the stack. |
| { |
| Label loop, done_loop; |
| __ Mov(x5, 0); |
| __ Bind(&loop); |
| __ Cmp(x5, x0); |
| __ B(gt, &done_loop); |
| __ Peek(x10, Operand(x4, LSL, kPointerSizeLog2)); |
| __ Poke(x10, Operand(x5, LSL, kPointerSizeLog2)); |
| __ Add(x4, x4, 1); |
| __ Add(x5, x5, 1); |
| __ B(&loop); |
| __ Bind(&done_loop); |
| } |
| |
| // Copy [[BoundArguments]] to the stack (below the arguments). |
| { |
| Label loop; |
| __ Ldrsw(x4, UntagSmiFieldMemOperand(x2, FixedArray::kLengthOffset)); |
| __ Add(x2, x2, FixedArray::kHeaderSize - kHeapObjectTag); |
| __ Bind(&loop); |
| __ Sub(x4, x4, 1); |
| __ Ldr(x10, MemOperand(x2, x4, LSL, kPointerSizeLog2)); |
| __ Poke(x10, Operand(x0, LSL, kPointerSizeLog2)); |
| __ Add(x0, x0, 1); |
| __ Cmp(x4, 0); |
| __ B(gt, &loop); |
| } |
| } |
| __ Bind(&no_bound_arguments); |
| } |
| |
| } // namespace |
| |
| // static |
| void Builtins::Generate_CallBoundFunctionImpl(MacroAssembler* masm, |
| TailCallMode tail_call_mode) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : the function to call (checked to be a JSBoundFunction) |
| // ----------------------------------- |
| __ AssertBoundFunction(x1); |
| |
| if (tail_call_mode == TailCallMode::kAllow) { |
| PrepareForTailCall(masm, x0, x3, x4, x5); |
| } |
| |
| // Patch the receiver to [[BoundThis]]. |
| __ Ldr(x10, FieldMemOperand(x1, JSBoundFunction::kBoundThisOffset)); |
| __ Poke(x10, Operand(x0, LSL, kPointerSizeLog2)); |
| |
| // Push the [[BoundArguments]] onto the stack. |
| Generate_PushBoundArguments(masm); |
| |
| // Call the [[BoundTargetFunction]] via the Call builtin. |
| __ Ldr(x1, FieldMemOperand(x1, JSBoundFunction::kBoundTargetFunctionOffset)); |
| __ Mov(x10, |
| ExternalReference(Builtins::kCall_ReceiverIsAny, masm->isolate())); |
| __ Ldr(x11, MemOperand(x10)); |
| __ Add(x12, x11, Code::kHeaderSize - kHeapObjectTag); |
| __ Br(x12); |
| } |
| |
| // static |
| void Builtins::Generate_Call(MacroAssembler* masm, ConvertReceiverMode mode, |
| TailCallMode tail_call_mode) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : the target to call (can be any Object). |
| // ----------------------------------- |
| |
| Label non_callable, non_function, non_smi; |
| __ JumpIfSmi(x1, &non_callable); |
| __ Bind(&non_smi); |
| __ CompareObjectType(x1, x4, x5, JS_FUNCTION_TYPE); |
| __ Jump(masm->isolate()->builtins()->CallFunction(mode, tail_call_mode), |
| RelocInfo::CODE_TARGET, eq); |
| __ Cmp(x5, JS_BOUND_FUNCTION_TYPE); |
| __ Jump(masm->isolate()->builtins()->CallBoundFunction(tail_call_mode), |
| RelocInfo::CODE_TARGET, eq); |
| |
| // Check if target has a [[Call]] internal method. |
| __ Ldrb(x4, FieldMemOperand(x4, Map::kBitFieldOffset)); |
| __ TestAndBranchIfAllClear(x4, 1 << Map::kIsCallable, &non_callable); |
| |
| __ Cmp(x5, JS_PROXY_TYPE); |
| __ B(ne, &non_function); |
| |
| // 0. Prepare for tail call if necessary. |
| if (tail_call_mode == TailCallMode::kAllow) { |
| PrepareForTailCall(masm, x0, x3, x4, x5); |
| } |
| |
| // 1. Runtime fallback for Proxy [[Call]]. |
| __ Push(x1); |
| // Increase the arguments size to include the pushed function and the |
| // existing receiver on the stack. |
| __ Add(x0, x0, Operand(2)); |
| // Tail-call to the runtime. |
| __ JumpToExternalReference( |
| ExternalReference(Runtime::kJSProxyCall, masm->isolate())); |
| |
| // 2. Call to something else, which might have a [[Call]] internal method (if |
| // not we raise an exception). |
| __ Bind(&non_function); |
| // Overwrite the original receiver with the (original) target. |
| __ Poke(x1, Operand(x0, LSL, kXRegSizeLog2)); |
| // Let the "call_as_function_delegate" take care of the rest. |
| __ LoadNativeContextSlot(Context::CALL_AS_FUNCTION_DELEGATE_INDEX, x1); |
| __ Jump(masm->isolate()->builtins()->CallFunction( |
| ConvertReceiverMode::kNotNullOrUndefined, tail_call_mode), |
| RelocInfo::CODE_TARGET); |
| |
| // 3. Call to something that is not callable. |
| __ bind(&non_callable); |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ Push(x1); |
| __ CallRuntime(Runtime::kThrowCalledNonCallable); |
| } |
| } |
| |
| // static |
| void Builtins::Generate_ConstructFunction(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : the constructor to call (checked to be a JSFunction) |
| // -- x3 : the new target (checked to be a constructor) |
| // ----------------------------------- |
| __ AssertFunction(x1); |
| |
| // Calling convention for function specific ConstructStubs require |
| // x2 to contain either an AllocationSite or undefined. |
| __ LoadRoot(x2, Heap::kUndefinedValueRootIndex); |
| |
| // 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); |
| } |
| |
| // static |
| void Builtins::Generate_ConstructBoundFunction(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : the function to call (checked to be a JSBoundFunction) |
| // -- x3 : the new target (checked to be a constructor) |
| // ----------------------------------- |
| __ AssertBoundFunction(x1); |
| |
| // Push the [[BoundArguments]] onto the stack. |
| Generate_PushBoundArguments(masm); |
| |
| // Patch new.target to [[BoundTargetFunction]] if new.target equals target. |
| { |
| Label done; |
| __ Cmp(x1, x3); |
| __ B(ne, &done); |
| __ Ldr(x3, |
| FieldMemOperand(x1, JSBoundFunction::kBoundTargetFunctionOffset)); |
| __ Bind(&done); |
| } |
| |
| // Construct the [[BoundTargetFunction]] via the Construct builtin. |
| __ Ldr(x1, FieldMemOperand(x1, JSBoundFunction::kBoundTargetFunctionOffset)); |
| __ Mov(x10, ExternalReference(Builtins::kConstruct, masm->isolate())); |
| __ Ldr(x11, MemOperand(x10)); |
| __ Add(x12, x11, Code::kHeaderSize - kHeapObjectTag); |
| __ Br(x12); |
| } |
| |
| // static |
| void Builtins::Generate_ConstructProxy(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : the constructor to call (checked to be a JSProxy) |
| // -- x3 : the new target (either the same as the constructor or |
| // the JSFunction on which new was invoked initially) |
| // ----------------------------------- |
| |
| // Call into the Runtime for Proxy [[Construct]]. |
| __ Push(x1); |
| __ Push(x3); |
| // Include the pushed new_target, constructor and the receiver. |
| __ Add(x0, x0, 3); |
| // Tail-call to the runtime. |
| __ JumpToExternalReference( |
| ExternalReference(Runtime::kJSProxyConstruct, masm->isolate())); |
| } |
| |
| // static |
| void Builtins::Generate_Construct(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- x0 : the number of arguments (not including the receiver) |
| // -- x1 : the constructor to call (can be any Object) |
| // -- x3 : the new target (either the same as the constructor or |
| // the JSFunction on which new was invoked initially) |
| // ----------------------------------- |
| |
| // Check if target is a Smi. |
| Label non_constructor; |
| __ JumpIfSmi(x1, &non_constructor); |
| |
| // Dispatch based on instance type. |
| __ CompareObjectType(x1, x4, x5, JS_FUNCTION_TYPE); |
| __ Jump(masm->isolate()->builtins()->ConstructFunction(), |
| RelocInfo::CODE_TARGET, eq); |
| |
| // Check if target has a [[Construct]] internal method. |
| __ Ldrb(x2, FieldMemOperand(x4, Map::kBitFieldOffset)); |
| __ TestAndBranchIfAllClear(x2, 1 << Map::kIsConstructor, &non_constructor); |
| |
| // Only dispatch to bound functions after checking whether they are |
| // constructors. |
| __ Cmp(x5, JS_BOUND_FUNCTION_TYPE); |
| __ Jump(masm->isolate()->builtins()->ConstructBoundFunction(), |
| RelocInfo::CODE_TARGET, eq); |
| |
| // Only dispatch to proxies after checking whether they are constructors. |
| __ Cmp(x5, JS_PROXY_TYPE); |
| __ Jump(masm->isolate()->builtins()->ConstructProxy(), RelocInfo::CODE_TARGET, |
| eq); |
| |
| // Called Construct on an exotic Object with a [[Construct]] internal method. |
| { |
| // Overwrite the original receiver with the (original) target. |
| __ Poke(x1, Operand(x0, LSL, kXRegSizeLog2)); |
| // Let the "call_as_constructor_delegate" take care of the rest. |
| __ LoadNativeContextSlot(Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, x1); |
| __ Jump(masm->isolate()->builtins()->CallFunction(), |
| RelocInfo::CODE_TARGET); |
| } |
| |
| // Called Construct on an Object that doesn't have a [[Construct]] internal |
| // method. |
| __ bind(&non_constructor); |
| __ Jump(masm->isolate()->builtins()->ConstructedNonConstructable(), |
| RelocInfo::CODE_TARGET); |
| } |
| |
| // static |
| void Builtins::Generate_AllocateInNewSpace(MacroAssembler* masm) { |
| ASM_LOCATION("Builtins::Generate_AllocateInNewSpace"); |
| // ----------- S t a t e ------------- |
| // -- x1 : requested object size (untagged) |
| // -- lr : return address |
| // ----------------------------------- |
| __ SmiTag(x1); |
| __ Push(x1); |
| __ Move(cp, Smi::FromInt(0)); |
| __ TailCallRuntime(Runtime::kAllocateInNewSpace); |
| } |
| |
| // static |
| void Builtins::Generate_AllocateInOldSpace(MacroAssembler* masm) { |
| ASM_LOCATION("Builtins::Generate_AllocateInOldSpace"); |
| // ----------- S t a t e ------------- |
| // -- x1 : requested object size (untagged) |
| // -- lr : return address |
| // ----------------------------------- |
| __ SmiTag(x1); |
| __ Move(x2, Smi::FromInt(AllocateTargetSpace::encode(OLD_SPACE))); |
| __ Push(x1, x2); |
| __ Move(cp, Smi::FromInt(0)); |
| __ TailCallRuntime(Runtime::kAllocateInTargetSpace); |
| } |
| |
| // static |
| void Builtins::Generate_Abort(MacroAssembler* masm) { |
| ASM_LOCATION("Builtins::Generate_Abort"); |
| // ----------- S t a t e ------------- |
| // -- x1 : message_id as Smi |
| // -- lr : return address |
| // ----------------------------------- |
| MacroAssembler::NoUseRealAbortsScope no_use_real_aborts(masm); |
| __ Push(x1); |
| __ Move(cp, Smi::FromInt(0)); |
| __ TailCallRuntime(Runtime::kAbort); |
| } |
| |
| // static |
| void Builtins::Generate_StringToNumber(MacroAssembler* masm) { |
| // The StringToNumber stub takes one argument in x0. |
| __ AssertString(x0); |
| |
| // Check if string has a cached array index. |
| Label runtime; |
| __ Ldr(x2, FieldMemOperand(x0, String::kHashFieldOffset)); |
| __ Tst(x2, Operand(String::kContainsCachedArrayIndexMask)); |
| __ B(ne, &runtime); |
| __ IndexFromHash(x2, x0); |
| __ Ret(); |
| |
| __ Bind(&runtime); |
| { |
| FrameScope frame(masm, StackFrame::INTERNAL); |
| // Push argument. |
| __ Push(x0); |
| // We cannot use a tail call here because this builtin can also be called |
| // from wasm. |
| __ CallRuntime(Runtime::kStringToNumber); |
| } |
| __ Ret(); |
| } |
| |
| // static |
| void Builtins::Generate_ToNumber(MacroAssembler* masm) { |
| // The ToNumber stub takes one argument in x0. |
| Label not_smi; |
| __ JumpIfNotSmi(x0, ¬_smi); |
| __ Ret(); |
| __ Bind(¬_smi); |
| |
| Label not_heap_number; |
| __ CompareObjectType(x0, x1, x1, HEAP_NUMBER_TYPE); |
| // x0: receiver |
| // x1: receiver instance type |
| __ B(ne, ¬_heap_number); |
| __ Ret(); |
| __ Bind(¬_heap_number); |
| |
| __ Jump(masm->isolate()->builtins()->NonNumberToNumber(), |
| RelocInfo::CODE_TARGET); |
| } |
| |
| void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) { |
| ASM_LOCATION("Builtins::Generate_ArgumentsAdaptorTrampoline"); |
| // ----------- S t a t e ------------- |
| // -- x0 : actual number of arguments |
| // -- x1 : function (passed through to callee) |
| // -- x2 : expected number of arguments |
| // -- x3 : new target (passed through to callee) |
| // ----------------------------------- |
| |
| Register argc_actual = x0; // Excluding the receiver. |
| Register argc_expected = x2; // Excluding the receiver. |
| Register function = x1; |
| Register code_entry = x10; |
| |
| Label invoke, dont_adapt_arguments, stack_overflow; |
| |
| Label enough, too_few; |
| __ Cmp(argc_actual, argc_expected); |
| __ B(lt, &too_few); |
| __ Cmp(argc_expected, SharedFunctionInfo::kDontAdaptArgumentsSentinel); |
| __ B(eq, &dont_adapt_arguments); |
| |
| { // Enough parameters: actual >= expected |
| EnterArgumentsAdaptorFrame(masm); |
| ArgumentAdaptorStackCheck(masm, &stack_overflow); |
| |
| Register copy_start = x10; |
| Register copy_end = x11; |
| Register copy_to = x12; |
| Register scratch1 = x13, scratch2 = x14; |
| |
| __ Lsl(scratch2, argc_expected, kPointerSizeLog2); |
| |
| // Adjust for fp, lr, and the receiver. |
| __ Add(copy_start, fp, 3 * kPointerSize); |
| __ Add(copy_start, copy_start, Operand(argc_actual, LSL, kPointerSizeLog2)); |
| __ Sub(copy_end, copy_start, scratch2); |
| __ Sub(copy_end, copy_end, kPointerSize); |
| __ Mov(copy_to, jssp); |
| |
| // Claim space for the arguments, the receiver, and one extra slot. |
| // The extra slot ensures we do not write under jssp. It will be popped |
| // later. |
| __ Add(scratch1, scratch2, 2 * kPointerSize); |
| __ Claim(scratch1, 1); |
| |
| // Copy the arguments (including the receiver) to the new stack frame. |
| Label copy_2_by_2; |
| __ Bind(©_2_by_2); |
| __ Ldp(scratch1, scratch2, |
| MemOperand(copy_start, -2 * kPointerSize, PreIndex)); |
| __ Stp(scratch1, scratch2, |
| MemOperand(copy_to, -2 * kPointerSize, PreIndex)); |
| __ Cmp(copy_start, copy_end); |
| __ B(hi, ©_2_by_2); |
| |
| // Correct the space allocated for the extra slot. |
| __ Drop(1); |
| |
| __ B(&invoke); |
| } |
| |
| { // Too few parameters: Actual < expected |
| __ Bind(&too_few); |
| |
| Register copy_from = x10; |
| Register copy_end = x11; |
| Register copy_to = x12; |
| Register scratch1 = x13, scratch2 = x14; |
| |
| EnterArgumentsAdaptorFrame(masm); |
| ArgumentAdaptorStackCheck(masm, &stack_overflow); |
| |
| __ Lsl(scratch2, argc_expected, kPointerSizeLog2); |
| __ Lsl(argc_actual, argc_actual, kPointerSizeLog2); |
| |
| // Adjust for fp, lr, and the receiver. |
| __ Add(copy_from, fp, 3 * kPointerSize); |
| __ Add(copy_from, copy_from, argc_actual); |
| __ Mov(copy_to, jssp); |
| __ Sub(copy_end, copy_to, 1 * kPointerSize); // Adjust for the receiver. |
| __ Sub(copy_end, copy_end, argc_actual); |
| |
| // Claim space for the arguments, the receiver, and one extra slot. |
| // The extra slot ensures we do not write under jssp. It will be popped |
| // later. |
| __ Add(scratch1, scratch2, 2 * kPointerSize); |
| __ Claim(scratch1, 1); |
| |
| // Copy the arguments (including the receiver) to the new stack frame. |
| Label copy_2_by_2; |
| __ Bind(©_2_by_2); |
| __ Ldp(scratch1, scratch2, |
| MemOperand(copy_from, -2 * kPointerSize, PreIndex)); |
| __ Stp(scratch1, scratch2, |
| MemOperand(copy_to, -2 * kPointerSize, PreIndex)); |
| __ Cmp(copy_to, copy_end); |
| __ B(hi, ©_2_by_2); |
| |
| __ Mov(copy_to, copy_end); |
| |
| // Fill the remaining expected arguments with undefined. |
| __ LoadRoot(scratch1, Heap::kUndefinedValueRootIndex); |
| __ Add(copy_end, jssp, kPointerSize); |
| |
| Label fill; |
| __ Bind(&fill); |
| __ Stp(scratch1, scratch1, |
| MemOperand(copy_to, -2 * kPointerSize, PreIndex)); |
| __ Cmp(copy_to, copy_end); |
| __ B(hi, &fill); |
| |
| // Correct the space allocated for the extra slot. |
| __ Drop(1); |
| } |
| |
| // Arguments have been adapted. Now call the entry point. |
| __ Bind(&invoke); |
| __ Mov(argc_actual, argc_expected); |
| // x0 : expected number of arguments |
| // x1 : function (passed through to callee) |
| // x3 : new target (passed through to callee) |
| __ Ldr(code_entry, FieldMemOperand(function, JSFunction::kCodeEntryOffset)); |
| __ Call(code_entry); |
| |
| // Store offset of return address for deoptimizer. |
| masm->isolate()->heap()->SetArgumentsAdaptorDeoptPCOffset(masm->pc_offset()); |
| |
| // Exit frame and return. |
| LeaveArgumentsAdaptorFrame(masm); |
| __ Ret(); |
| |
| // Call the entry point without adapting the arguments. |
| __ Bind(&dont_adapt_arguments); |
| __ Ldr(code_entry, FieldMemOperand(function, JSFunction::kCodeEntryOffset)); |
| __ Jump(code_entry); |
| |
| __ Bind(&stack_overflow); |
| { |
| FrameScope frame(masm, StackFrame::MANUAL); |
| __ CallRuntime(Runtime::kThrowStackOverflow); |
| __ Unreachable(); |
| } |
| } |
| |
| #undef __ |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_TARGET_ARCH_ARM |