[builtins] move builtin files to src/builtins/.

src/arm64/builtins-arm64.cc

-// 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, CFunctionId id,
-                                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(id, 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?
-  Label got_literals, maybe_cleared_weakcell;
-  Register temp2 = x7;
-  __ Ldr(temp, FieldMemOperand(array_pointer,
-                               SharedFunctionInfo::kOffsetToPreviousLiterals));
-  // temp contains either a WeakCell pointing to the literals array or the
-  // literals array directly.
-  STATIC_ASSERT(WeakCell::kValueOffset == FixedArray::kLengthOffset);
-  __ Ldr(temp2, FieldMemOperand(temp, WeakCell::kValueOffset));
-  __ JumpIfSmi(temp2, &maybe_cleared_weakcell);
-  // temp2 is a pointer, therefore temp is a WeakCell pointing to a literals
-  // array.
-  __ Ldr(temp, FieldMemOperand(temp, WeakCell::kValueOffset));
-  __ jmp(&got_literals);
-
-  // r4 is a smi. If it's 0, then we are looking at a cleared WeakCell
-  // around the literals array, and we should visit the runtime. If it's > 0,
-  // then temp already contains the literals array.
-  __ bind(&maybe_cleared_weakcell);
-  __ Cmp(temp2, Operand(Smi::FromInt(0)));
-  __ B(eq, &gotta_call_runtime);
-
-  // Save the literals in the closure.
-  __ bind(&got_literals);
-  __ 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);
-}
-
-
-void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) {
-  // Lookup the function in the JavaScript frame.
-  __ 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 unoptimized code.
-  Label skip;
-  __ CompareAndBranch(x0, Smi::FromInt(0), ne, &skip);
-  __ Ret();
-
-  __ Bind(&skip);
-
-  // 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();
-}
-
-
-// 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_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, &not_smi);
-  __ Ret();
-  __ Bind(&not_smi);
-
-  Label not_heap_number;
-  __ CompareObjectType(x0, x1, x1, HEAP_NUMBER_TYPE);
-  // x0: receiver
-  // x1: receiver instance type
-  __ B(ne, &not_heap_number);
-  __ Ret();
-  __ Bind(&not_heap_number);
-
-  __ Jump(masm->isolate()->builtins()->NonNumberToNumber(),
-          RelocInfo::CODE_TARGET);
-}
-
-// static
-void Builtins::Generate_NonNumberToNumber(MacroAssembler* masm) {
-  // The NonNumberToNumber stub takes one argument in x0.
-  __ AssertNotNumber(x0);
-
-  Label not_string;
-  __ CompareObjectType(x0, x1, x1, FIRST_NONSTRING_TYPE);
-  // x0: receiver
-  // x1: receiver instance type
-  __ B(hs, &not_string);
-  __ Jump(masm->isolate()->builtins()->StringToNumber(),
-          RelocInfo::CODE_TARGET);
-  __ Bind(&not_string);
-
-  Label not_oddball;
-  __ Cmp(x1, ODDBALL_TYPE);
-  __ B(ne, &not_oddball);
-  __ Ldr(x0, FieldMemOperand(x0, Oddball::kToNumberOffset));
-  __ Ret();
-  __ Bind(&not_oddball);
-  {
-    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::kToNumber);
-  }
-  __ Ret();
-}
-
-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(&copy_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, &copy_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(&copy_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, &copy_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