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

src/mips/builtins-mips.cc

-// Copyright 2012 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#if V8_TARGET_ARCH_MIPS
-
-#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)
-
-void Builtins::Generate_Adaptor(MacroAssembler* masm, CFunctionId id,
-                                ExitFrameType exit_frame_type) {
-  // ----------- S t a t e -------------
-  //  -- a0                 : number of arguments excluding receiver
-  //  -- a1                 : target
-  //  -- a3                 : new.target
-  //  -- sp[0]              : last argument
-  //  -- ...
-  //  -- sp[4 * (argc - 1)] : first argument
-  //  -- sp[4 * agrc]       : receiver
-  // -----------------------------------
-  __ AssertFunction(a1);
-
-  // 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).
-  __ lw(cp, FieldMemOperand(a1, JSFunction::kContextOffset));
-
-  // JumpToExternalReference expects a0 to contain the number of arguments
-  // including the receiver and the extra arguments.
-  const int num_extra_args = 3;
-  __ Addu(a0, a0, num_extra_args + 1);
-
-  // Insert extra arguments.
-  __ SmiTag(a0);
-  __ Push(a0, a1, a3);
-  __ SmiUntag(a0);
-
-  __ JumpToExternalReference(ExternalReference(id, masm->isolate()), PROTECT,
-                             exit_frame_type == BUILTIN_EXIT);
-}
-
-
-// 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);
-}
-
-
-// Load the built-in Array function from the current context.
-static void GenerateLoadArrayFunction(MacroAssembler* masm, Register result) {
-  // Load the Array function from the native context.
-  __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, result);
-}
-
-
-void Builtins::Generate_InternalArrayCode(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0     : number of arguments
-  //  -- ra     : return address
-  //  -- sp[...]: constructor arguments
-  // -----------------------------------
-  Label generic_array_code, one_or_more_arguments, two_or_more_arguments;
-
-  // Get the InternalArray function.
-  GenerateLoadInternalArrayFunction(masm, a1);
-
-  if (FLAG_debug_code) {
-    // Initial map for the builtin InternalArray functions should be maps.
-    __ lw(a2, FieldMemOperand(a1, JSFunction::kPrototypeOrInitialMapOffset));
-    __ SmiTst(a2, t0);
-    __ Assert(ne, kUnexpectedInitialMapForInternalArrayFunction,
-              t0, Operand(zero_reg));
-    __ GetObjectType(a2, a3, t0);
-    __ Assert(eq, kUnexpectedInitialMapForInternalArrayFunction,
-              t0, Operand(MAP_TYPE));
-  }
-
-  // Run the native code for the InternalArray function called as a normal
-  // function.
-  // Tail call a stub.
-  InternalArrayConstructorStub stub(masm->isolate());
-  __ TailCallStub(&stub);
-}
-
-
-void Builtins::Generate_ArrayCode(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0     : number of arguments
-  //  -- ra     : return address
-  //  -- sp[...]: constructor arguments
-  // -----------------------------------
-  Label generic_array_code;
-
-  // Get the Array function.
-  GenerateLoadArrayFunction(masm, a1);
-
-  if (FLAG_debug_code) {
-    // Initial map for the builtin Array functions should be maps.
-    __ lw(a2, FieldMemOperand(a1, JSFunction::kPrototypeOrInitialMapOffset));
-    __ SmiTst(a2, t0);
-    __ Assert(ne, kUnexpectedInitialMapForArrayFunction1,
-              t0, Operand(zero_reg));
-    __ GetObjectType(a2, a3, t0);
-    __ Assert(eq, kUnexpectedInitialMapForArrayFunction2,
-              t0, Operand(MAP_TYPE));
-  }
-
-  // Run the native code for the Array function called as a normal function.
-  // Tail call a stub.
-  __ mov(a3, a1);
-  __ LoadRoot(a2, Heap::kUndefinedValueRootIndex);
-  ArrayConstructorStub stub(masm->isolate());
-  __ TailCallStub(&stub);
-}
-
-
-// static
-void Builtins::Generate_MathMaxMin(MacroAssembler* masm, MathMaxMinKind kind) {
-  // ----------- S t a t e -------------
-  //  -- a0                     : number of arguments
-  //  -- a1                     : function
-  //  -- cp                     : context
-  //  -- ra                     : return address
-  //  -- sp[(argc - n - 1) * 4] : arg[n] (zero-based)
-  //  -- sp[argc * 4]           : receiver
-  // -----------------------------------
-  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 t2 and the double value in f0.
-  __ LoadRoot(t2, root_index);
-  __ ldc1(f0, FieldMemOperand(t2, HeapNumber::kValueOffset));
-
-  Label done_loop, loop;
-  __ mov(a3, a0);
-  __ bind(&loop);
-  {
-    // Check if all parameters done.
-    __ Subu(a3, a3, Operand(1));
-    __ Branch(&done_loop, lt, a3, Operand(zero_reg));
-
-    // Load the next parameter tagged value into a2.
-    __ Lsa(at, sp, a3, kPointerSizeLog2);
-    __ lw(a2, MemOperand(at));
-
-    // Load the double value of the parameter into f2, maybe converting the
-    // parameter to a number first using the ToNumber builtin if necessary.
-    Label convert, convert_smi, convert_number, done_convert;
-    __ bind(&convert);
-    __ JumpIfSmi(a2, &convert_smi);
-    __ lw(t0, FieldMemOperand(a2, HeapObject::kMapOffset));
-    __ JumpIfRoot(t0, Heap::kHeapNumberMapRootIndex, &convert_number);
-    {
-      // Parameter is not a Number, use the ToNumber builtin to convert it.
-      FrameScope scope(masm, StackFrame::MANUAL);
-      __ SmiTag(a0);
-      __ SmiTag(a3);
-      __ EnterBuiltinFrame(cp, a1, a0);
-      __ Push(t2, a3);
-      __ mov(a0, a2);
-      __ Call(masm->isolate()->builtins()->ToNumber(), RelocInfo::CODE_TARGET);
-      __ mov(a2, v0);
-      __ Pop(t2, a3);
-      __ LeaveBuiltinFrame(cp, a1, a0);
-      __ SmiUntag(a3);
-      __ SmiUntag(a0);
-      {
-        // Restore the double accumulator value (f0).
-        Label restore_smi, done_restore;
-        __ JumpIfSmi(t2, &restore_smi);
-        __ ldc1(f0, FieldMemOperand(t2, HeapNumber::kValueOffset));
-        __ jmp(&done_restore);
-        __ bind(&restore_smi);
-        __ SmiToDoubleFPURegister(t2, f0, t0);
-        __ bind(&done_restore);
-      }
-    }
-    __ jmp(&convert);
-    __ bind(&convert_number);
-    __ ldc1(f2, FieldMemOperand(a2, HeapNumber::kValueOffset));
-    __ jmp(&done_convert);
-    __ bind(&convert_smi);
-    __ SmiToDoubleFPURegister(a2, f2, t0);
-    __ bind(&done_convert);
-
-    // Perform the actual comparison with using Min/Max macro instructions the
-    // accumulator value on the left hand side (f0) and the next parameter value
-    // on the right hand side (f2).
-    // We need to work out which HeapNumber (or smi) the result came from.
-    Label compare_nan, set_value;
-    __ BranchF(nullptr, &compare_nan, eq, f0, f2);
-    __ Move(t0, t1, f0);
-    if (kind == MathMaxMinKind::kMin) {
-      __ MinNaNCheck_d(f0, f0, f2);
-    } else {
-      DCHECK(kind == MathMaxMinKind::kMax);
-      __ MaxNaNCheck_d(f0, f0, f2);
-    }
-    __ Move(at, t8, f0);
-    __ Branch(&set_value, ne, t0, Operand(at));
-    __ Branch(&set_value, ne, t1, Operand(t8));
-    __ jmp(&loop);
-    __ bind(&set_value);
-    __ mov(t2, a2);
-    __ jmp(&loop);
-
-    // At least one side is NaN, which means that the result will be NaN too.
-    __ bind(&compare_nan);
-    __ LoadRoot(t2, Heap::kNanValueRootIndex);
-    __ ldc1(f0, FieldMemOperand(t2, HeapNumber::kValueOffset));
-    __ jmp(&loop);
-  }
-
-  __ bind(&done_loop);
-  // Drop all slots, including the receiver.
-  __ Addu(a0, a0, Operand(1));
-  __ Lsa(sp, sp, a0, kPointerSizeLog2);
-  __ Ret(USE_DELAY_SLOT);
-  __ mov(v0, t2);  // In delay slot.
-}
-
-// static
-void Builtins::Generate_NumberConstructor(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0                     : number of arguments
-  //  -- a1                     : constructor function
-  //  -- cp                     : context
-  //  -- ra                     : return address
-  //  -- sp[(argc - n - 1) * 4] : arg[n] (zero based)
-  //  -- sp[argc * 4]           : receiver
-  // -----------------------------------
-
-  // 1. Load the first argument into a0.
-  Label no_arguments;
-  {
-    __ Branch(USE_DELAY_SLOT, &no_arguments, eq, a0, Operand(zero_reg));
-    __ Subu(t1, a0, Operand(1));  // In delay slot.
-    __ mov(t0, a0);               // Store argc in t0.
-    __ Lsa(at, sp, t1, kPointerSizeLog2);
-    __ lw(a0, MemOperand(at));
-  }
-
-  // 2a. Convert first argument to number.
-  {
-    FrameScope scope(masm, StackFrame::MANUAL);
-    __ SmiTag(t0);
-    __ EnterBuiltinFrame(cp, a1, t0);
-    __ Call(masm->isolate()->builtins()->ToNumber(), RelocInfo::CODE_TARGET);
-    __ LeaveBuiltinFrame(cp, a1, t0);
-    __ SmiUntag(t0);
-  }
-
-  {
-    // Drop all arguments including the receiver.
-    __ Lsa(sp, sp, t0, kPointerSizeLog2);
-    __ DropAndRet(1);
-  }
-
-  // 2b. No arguments, return +0.
-  __ bind(&no_arguments);
-  __ Move(v0, Smi::FromInt(0));
-  __ DropAndRet(1);
-}
-
-
-// static
-void Builtins::Generate_NumberConstructor_ConstructStub(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0                     : number of arguments
-  //  -- a1                     : constructor function
-  //  -- a3                     : new target
-  //  -- cp                     : context
-  //  -- ra                     : return address
-  //  -- sp[(argc - n - 1) * 4] : arg[n] (zero based)
-  //  -- sp[argc * 4]           : receiver
-  // -----------------------------------
-
-  // 1. Make sure we operate in the context of the called function.
-  __ lw(cp, FieldMemOperand(a1, JSFunction::kContextOffset));
-
-  // 2. Load the first argument into a0.
-  {
-    Label no_arguments, done;
-    __ mov(t0, a0);  // Store argc in t0.
-    __ Branch(USE_DELAY_SLOT, &no_arguments, eq, a0, Operand(zero_reg));
-    __ Subu(t1, a0, Operand(1));  // In delay slot.
-    __ Lsa(at, sp, t1, kPointerSizeLog2);
-    __ lw(a0, MemOperand(at));
-    __ jmp(&done);
-    __ bind(&no_arguments);
-    __ Move(a0, Smi::FromInt(0));
-    __ bind(&done);
-  }
-
-  // 3. Make sure a0 is a number.
-  {
-    Label done_convert;
-    __ JumpIfSmi(a0, &done_convert);
-    __ GetObjectType(a0, a2, a2);
-    __ Branch(&done_convert, eq, a2, Operand(HEAP_NUMBER_TYPE));
-    {
-      FrameScope scope(masm, StackFrame::MANUAL);
-      __ SmiTag(t0);
-      __ EnterBuiltinFrame(cp, a1, t0);
-      __ Push(a3);
-      __ Call(masm->isolate()->builtins()->ToNumber(), RelocInfo::CODE_TARGET);
-      __ Move(a0, v0);
-      __ Pop(a3);
-      __ LeaveBuiltinFrame(cp, a1, t0);
-      __ SmiUntag(t0);
-    }
-    __ bind(&done_convert);
-  }
-
-  // 4. Check if new target and constructor differ.
-  Label drop_frame_and_ret, new_object;
-  __ Branch(&new_object, ne, a1, Operand(a3));
-
-  // 5. Allocate a JSValue wrapper for the number.
-  __ AllocateJSValue(v0, a1, a0, a2, t1, &new_object);
-  __ jmp(&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(t0);
-    __ EnterBuiltinFrame(cp, a1, t0);
-    __ Push(a0);  // first argument
-    __ CallStub(&stub);
-    __ Pop(a0);
-    __ LeaveBuiltinFrame(cp, a1, t0);
-    __ SmiUntag(t0);
-  }
-  __ sw(a0, FieldMemOperand(v0, JSValue::kValueOffset));
-
-  __ bind(&drop_frame_and_ret);
-  {
-    __ Lsa(sp, sp, t0, kPointerSizeLog2);
-    __ DropAndRet(1);
-  }
-}
-
-
-// static
-void Builtins::Generate_StringConstructor(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0                     : number of arguments
-  //  -- a1                     : constructor function
-  //  -- cp                     : context
-  //  -- ra                     : return address
-  //  -- sp[(argc - n - 1) * 4] : arg[n] (zero based)
-  //  -- sp[argc * 4]           : receiver
-  // -----------------------------------
-
-  // 1. Load the first argument into a0.
-  Label no_arguments;
-  {
-    __ Branch(USE_DELAY_SLOT, &no_arguments, eq, a0, Operand(zero_reg));
-    __ Subu(t1, a0, Operand(1));
-    __ mov(t0, a0);  // Store argc in t0.
-    __ Lsa(at, sp, t1, kPointerSizeLog2);
-    __ lw(a0, MemOperand(at));
-  }
-
-  // 2a. At least one argument, return a0 if it's a string, otherwise
-  // dispatch to appropriate conversion.
-  Label drop_frame_and_ret, to_string, symbol_descriptive_string;
-  {
-    __ JumpIfSmi(a0, &to_string);
-    __ GetObjectType(a0, t1, t1);
-    STATIC_ASSERT(FIRST_NONSTRING_TYPE == SYMBOL_TYPE);
-    __ Subu(t1, t1, Operand(FIRST_NONSTRING_TYPE));
-    __ Branch(&symbol_descriptive_string, eq, t1, Operand(zero_reg));
-    __ Branch(&to_string, gt, t1, Operand(zero_reg));
-    __ mov(v0, a0);
-    __ jmp(&drop_frame_and_ret);
-  }
-
-  // 2b. No arguments, return the empty string (and pop the receiver).
-  __ bind(&no_arguments);
-  {
-    __ LoadRoot(v0, Heap::kempty_stringRootIndex);
-    __ DropAndRet(1);
-  }
-
-  // 3a. Convert a0 to a string.
-  __ bind(&to_string);
-  {
-    FrameScope scope(masm, StackFrame::MANUAL);
-    ToStringStub stub(masm->isolate());
-    __ SmiTag(t0);
-    __ EnterBuiltinFrame(cp, a1, t0);
-    __ CallStub(&stub);
-    __ LeaveBuiltinFrame(cp, a1, t0);
-    __ SmiUntag(t0);
-  }
-  __ jmp(&drop_frame_and_ret);
-
-  // 3b. Convert symbol in a0 to a string.
-  __ bind(&symbol_descriptive_string);
-  {
-    __ Lsa(sp, sp, t0, kPointerSizeLog2);
-    __ Drop(1);
-    __ Push(a0);
-    __ TailCallRuntime(Runtime::kSymbolDescriptiveString);
-  }
-
-  __ bind(&drop_frame_and_ret);
-  {
-    __ Lsa(sp, sp, t0, kPointerSizeLog2);
-    __ DropAndRet(1);
-  }
-}
-
-
-// static
-void Builtins::Generate_StringConstructor_ConstructStub(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0                     : number of arguments
-  //  -- a1                     : constructor function
-  //  -- a3                     : new target
-  //  -- cp                     : context
-  //  -- ra                     : return address
-  //  -- sp[(argc - n - 1) * 4] : arg[n] (zero based)
-  //  -- sp[argc * 4]           : receiver
-  // -----------------------------------
-
-  // 1. Make sure we operate in the context of the called function.
-  __ lw(cp, FieldMemOperand(a1, JSFunction::kContextOffset));
-
-  // 2. Load the first argument into a0.
-  {
-    Label no_arguments, done;
-    __ mov(t0, a0);  // Store argc in t0.
-    __ Branch(USE_DELAY_SLOT, &no_arguments, eq, a0, Operand(zero_reg));
-    __ Subu(t1, a0, Operand(1));
-    __ Lsa(at, sp, t1, kPointerSizeLog2);
-    __ lw(a0, MemOperand(at));
-    __ jmp(&done);
-    __ bind(&no_arguments);
-    __ LoadRoot(a0, Heap::kempty_stringRootIndex);
-    __ bind(&done);
-  }
-
-  // 3. Make sure a0 is a string.
-  {
-    Label convert, done_convert;
-    __ JumpIfSmi(a0, &convert);
-    __ GetObjectType(a0, a2, a2);
-    __ And(t1, a2, Operand(kIsNotStringMask));
-    __ Branch(&done_convert, eq, t1, Operand(zero_reg));
-    __ bind(&convert);
-    {
-      FrameScope scope(masm, StackFrame::MANUAL);
-      ToStringStub stub(masm->isolate());
-      __ SmiTag(t0);
-      __ EnterBuiltinFrame(cp, a1, t0);
-      __ Push(a3);
-      __ CallStub(&stub);
-      __ Move(a0, v0);
-      __ Pop(a3);
-      __ LeaveBuiltinFrame(cp, a1, t0);
-      __ SmiUntag(t0);
-    }
-    __ bind(&done_convert);
-  }
-
-  // 4. Check if new target and constructor differ.
-  Label drop_frame_and_ret, new_object;
-  __ Branch(&new_object, ne, a1, Operand(a3));
-
-  // 5. Allocate a JSValue wrapper for the string.
-  __ AllocateJSValue(v0, a1, a0, a2, t1, &new_object);
-  __ jmp(&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(t0);
-    __ EnterBuiltinFrame(cp, a1, t0);
-    __ Push(a0);  // first argument
-    __ CallStub(&stub);
-    __ Pop(a0);
-    __ LeaveBuiltinFrame(cp, a1, t0);
-    __ SmiUntag(t0);
-  }
-  __ sw(a0, FieldMemOperand(v0, JSValue::kValueOffset));
-
-  __ bind(&drop_frame_and_ret);
-  {
-    __ Lsa(sp, sp, t0, kPointerSizeLog2);
-    __ DropAndRet(1);
-  }
-}
-
-static void GenerateTailCallToSharedCode(MacroAssembler* masm) {
-  __ lw(a2, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
-  __ lw(a2, FieldMemOperand(a2, SharedFunctionInfo::kCodeOffset));
-  __ Addu(at, a2, Operand(Code::kHeaderSize - kHeapObjectTag));
-  __ Jump(at);
-}
-
-static void GenerateTailCallToReturnedCode(MacroAssembler* masm,
-                                           Runtime::FunctionId function_id) {
-  // ----------- S t a t e -------------
-  //  -- a0 : argument count (preserved for callee)
-  //  -- a1 : target function (preserved for callee)
-  //  -- a3 : new target (preserved for callee)
-  // -----------------------------------
-  {
-    FrameScope scope(masm, StackFrame::INTERNAL);
-    // Push a copy of the target function and the new target.
-    // Push function as parameter to the runtime call.
-    __ SmiTag(a0);
-    __ Push(a0, a1, a3, a1);
-
-    __ CallRuntime(function_id, 1);
-
-    // Restore target function and new target.
-    __ Pop(a0, a1, a3);
-    __ SmiUntag(a0);
-  }
-
-  __ Addu(at, v0, Operand(Code::kHeaderSize - kHeapObjectTag));
-  __ Jump(at);
-}
-
-
-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;
-  __ LoadRoot(t0, Heap::kStackLimitRootIndex);
-  __ Branch(&ok, hs, sp, Operand(t0));
-
-  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 -------------
-  //  -- a0     : number of arguments
-  //  -- a1     : constructor function
-  //  -- a2     : allocation site or undefined
-  //  -- a3     : new target
-  //  -- cp     : context
-  //  -- ra     : return address
-  //  -- sp[...]: constructor arguments
-  // -----------------------------------
-
-  Isolate* isolate = masm->isolate();
-
-  // Enter a construct frame.
-  {
-    FrameScope scope(masm, StackFrame::CONSTRUCT);
-
-    // Preserve the incoming parameters on the stack.
-    __ AssertUndefinedOrAllocationSite(a2, t0);
-    __ SmiTag(a0);
-    __ Push(cp, a2, a0);
-
-    if (create_implicit_receiver) {
-      // Allocate the new receiver object.
-      __ Push(a1, a3);
-      FastNewObjectStub stub(masm->isolate());
-      __ CallStub(&stub);
-      __ mov(t4, v0);
-      __ Pop(a1, a3);
-
-      // ----------- S t a t e -------------
-      //  -- a1: constructor function
-      //  -- a3: new target
-      //  -- t0: newly allocated object
-      // -----------------------------------
-
-      // Retrieve smi-tagged arguments count from the stack.
-      __ lw(a0, MemOperand(sp));
-    }
-
-    __ SmiUntag(a0);
-
-    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(t4, t4);
-    } else {
-      __ PushRoot(Heap::kTheHoleValueRootIndex);
-    }
-
-    // Set up pointer to last argument.
-    __ Addu(a2, fp, Operand(StandardFrameConstants::kCallerSPOffset));
-
-    // Copy arguments and receiver to the expression stack.
-    // a0: number of arguments
-    // a1: constructor function
-    // a2: address of last argument (caller sp)
-    // a3: new target
-    // t4: number of arguments (smi-tagged)
-    // sp[0]: receiver
-    // sp[1]: receiver
-    // sp[2]: number of arguments (smi-tagged)
-    Label loop, entry;
-    __ SmiTag(t4, a0);
-    __ jmp(&entry);
-    __ bind(&loop);
-    __ Lsa(t0, a2, t4, kPointerSizeLog2 - kSmiTagSize);
-    __ lw(t1, MemOperand(t0));
-    __ push(t1);
-    __ bind(&entry);
-    __ Addu(t4, t4, Operand(-2));
-    __ Branch(&loop, greater_equal, t4, Operand(zero_reg));
-
-    // Call the function.
-    // a0: number of arguments
-    // a1: constructor function
-    // a3: new target
-    ParameterCount actual(a0);
-    __ InvokeFunction(a1, a3, 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 context from the frame.
-    __ lw(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.
-      // v0: result
-      // sp[0]: receiver (newly allocated object)
-      // sp[1]: number of arguments (smi-tagged)
-      __ JumpIfSmi(v0, &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.
-      __ GetObjectType(v0, a1, a3);
-      __ Branch(&exit, greater_equal, a3, Operand(FIRST_JS_RECEIVER_TYPE));
-
-      // Throw away the result of the constructor invocation and use the
-      // on-stack receiver as the result.
-      __ bind(&use_receiver);
-      __ lw(v0, MemOperand(sp));
-
-      // Remove receiver from the stack, remove caller arguments, and
-      // return.
-      __ bind(&exit);
-      // v0: result
-      // sp[0]: receiver (newly allocated object)
-      // sp[1]: number of arguments (smi-tagged)
-      __ lw(a1, MemOperand(sp, 1 * kPointerSize));
-    } else {
-      __ lw(a1, MemOperand(sp));
-    }
-
-    // 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(v0, &dont_throw);
-    {
-      FrameScope scope(masm, StackFrame::INTERNAL);
-      __ CallRuntime(Runtime::kThrowDerivedConstructorReturnedNonObject);
-    }
-    __ bind(&dont_throw);
-  }
-
-  __ Lsa(sp, sp, a1, kPointerSizeLog2 - 1);
-  __ Addu(sp, sp, kPointerSize);
-  if (create_implicit_receiver) {
-    __ IncrementCounter(isolate->counters()->constructed_objects(), 1, a1, a2);
-  }
-  __ 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(a1);
-  __ CallRuntime(Runtime::kThrowConstructedNonConstructable);
-}
-
-
-enum IsTagged { kArgcIsSmiTagged, kArgcIsUntaggedInt };
-
-
-// Clobbers a2; 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 okay;
-  __ LoadRoot(a2, Heap::kRealStackLimitRootIndex);
-  // Make a2 the space we have left. The stack might already be overflowed
-  // here which will cause a2 to become negative.
-  __ Subu(a2, sp, a2);
-  // Check if the arguments will overflow the stack.
-  if (argc_is_tagged == kArgcIsSmiTagged) {
-    __ sll(t3, argc, kPointerSizeLog2 - kSmiTagSize);
-  } else {
-    DCHECK(argc_is_tagged == kArgcIsUntaggedInt);
-    __ sll(t3, argc, kPointerSizeLog2);
-  }
-  // Signed comparison.
-  __ Branch(&okay, gt, a2, Operand(t3));
-
-  // Out of stack space.
-  __ CallRuntime(Runtime::kThrowStackOverflow);
-
-  __ bind(&okay);
-}
-
-
-static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
-                                             bool is_construct) {
-  // Called from JSEntryStub::GenerateBody
-
-  // ----------- S t a t e -------------
-  //  -- a0: new.target
-  //  -- a1: function
-  //  -- a2: receiver_pointer
-  //  -- a3: argc
-  //  -- s0: argv
-  // -----------------------------------
-  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).
-    ExternalReference context_address(Isolate::kContextAddress,
-                                      masm->isolate());
-    __ li(cp, Operand(context_address));
-    __ lw(cp, MemOperand(cp));
-
-    // Push the function and the receiver onto the stack.
-    __ Push(a1, a2);
-
-    // Check if we have enough stack space to push all arguments.
-    // Clobbers a2.
-    Generate_CheckStackOverflow(masm, a3, kArgcIsUntaggedInt);
-
-    // Remember new.target.
-    __ mov(t1, a0);
-
-    // Copy arguments to the stack in a loop.
-    // a3: argc
-    // s0: argv, i.e. points to first arg
-    Label loop, entry;
-    __ Lsa(t2, s0, a3, kPointerSizeLog2);
-    __ b(&entry);
-    __ nop();   // Branch delay slot nop.
-    // t2 points past last arg.
-    __ bind(&loop);
-    __ lw(t0, MemOperand(s0));  // Read next parameter.
-    __ addiu(s0, s0, kPointerSize);
-    __ lw(t0, MemOperand(t0));  // Dereference handle.
-    __ push(t0);  // Push parameter.
-    __ bind(&entry);
-    __ Branch(&loop, ne, s0, Operand(t2));
-
-    // Setup new.target and argc.
-    __ mov(a0, a3);
-    __ mov(a3, t1);
-
-    // Initialize all JavaScript callee-saved registers, since they will be seen
-    // by the garbage collector as part of handlers.
-    __ LoadRoot(t0, Heap::kUndefinedValueRootIndex);
-    __ mov(s1, t0);
-    __ mov(s2, t0);
-    __ mov(s3, t0);
-    __ mov(s4, t0);
-    __ mov(s5, t0);
-    // s6 holds the root address. Do not clobber.
-    // s7 is cp. Do not init.
-
-    // Invoke the code.
-    Handle<Code> builtin = is_construct
-                               ? masm->isolate()->builtins()->Construct()
-                               : masm->isolate()->builtins()->Call();
-    __ Call(builtin, RelocInfo::CODE_TARGET);
-
-    // Leave internal frame.
-  }
-
-  __ Jump(ra);
-}
-
-
-void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) {
-  Generate_JSEntryTrampolineHelper(masm, false);
-}
-
-
-void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) {
-  Generate_JSEntryTrampolineHelper(masm, true);
-}
-
-// static
-void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- v0 : the value to pass to the generator
-  //  -- a1 : the JSGeneratorObject to resume
-  //  -- a2 : the resume mode (tagged)
-  //  -- ra : return address
-  // -----------------------------------
-  __ AssertGeneratorObject(a1);
-
-  // Store input value into generator object.
-  __ sw(v0, FieldMemOperand(a1, JSGeneratorObject::kInputOrDebugPosOffset));
-  __ RecordWriteField(a1, JSGeneratorObject::kInputOrDebugPosOffset, v0, a3,
-                      kRAHasNotBeenSaved, kDontSaveFPRegs);
-
-  // Store resume mode into generator object.
-  __ sw(a2, FieldMemOperand(a1, JSGeneratorObject::kResumeModeOffset));
-
-  // Load suspended function and context.
-  __ lw(cp, FieldMemOperand(a1, JSGeneratorObject::kContextOffset));
-  __ lw(t0, FieldMemOperand(a1, 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);
-  __ li(t1, Operand(last_step_action));
-  __ lb(t1, MemOperand(t1));
-  __ Branch(&prepare_step_in_if_stepping, ge, t1, Operand(StepIn));
-
-  // Flood function if we need to continue stepping in the suspended generator.
-  ExternalReference debug_suspended_generator =
-      ExternalReference::debug_suspended_generator_address(masm->isolate());
-  __ li(t1, Operand(debug_suspended_generator));
-  __ lw(t1, MemOperand(t1));
-  __ Branch(&prepare_step_in_suspended_generator, eq, a1, Operand(t1));
-  __ bind(&stepping_prepared);
-
-  // Push receiver.
-  __ lw(t1, FieldMemOperand(a1, JSGeneratorObject::kReceiverOffset));
-  __ Push(t1);
-
-  // ----------- S t a t e -------------
-  //  -- a1    : the JSGeneratorObject to resume
-  //  -- a2    : the resume mode (tagged)
-  //  -- t0    : generator function
-  //  -- cp    : generator context
-  //  -- ra    : return address
-  //  -- sp[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.
-  __ lw(a3, FieldMemOperand(t0, JSFunction::kSharedFunctionInfoOffset));
-  __ lw(a3,
-        FieldMemOperand(a3, SharedFunctionInfo::kFormalParameterCountOffset));
-  {
-    Label done_loop, loop;
-    __ bind(&loop);
-    __ Subu(a3, a3, Operand(Smi::FromInt(1)));
-    __ Branch(&done_loop, lt, a3, Operand(zero_reg));
-    __ PushRoot(Heap::kTheHoleValueRootIndex);
-    __ Branch(&loop);
-    __ bind(&done_loop);
-  }
-
-  // Dispatch on the kind of generator object.
-  Label old_generator;
-  __ lw(a3, FieldMemOperand(t0, JSFunction::kSharedFunctionInfoOffset));
-  __ lw(a3, FieldMemOperand(a3, SharedFunctionInfo::kFunctionDataOffset));
-  __ GetObjectType(a3, a3, a3);
-  __ Branch(&old_generator, ne, a3, Operand(BYTECODE_ARRAY_TYPE));
-
-  // New-style (ignition/turbofan) generator object.
-  {
-    __ lw(a0, FieldMemOperand(t0, JSFunction::kSharedFunctionInfoOffset));
-    __ lw(a0,
-         FieldMemOperand(a0, SharedFunctionInfo::kFormalParameterCountOffset));
-    __ SmiUntag(a0);
-    // 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(a3, a1);
-    __ Move(a1, t0);
-    __ lw(a2, FieldMemOperand(a1, JSFunction::kCodeEntryOffset));
-    __ Jump(a2);
-  }
-
-  // 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(ra, fp);
-    __ Move(fp, sp);
-    __ Push(cp, t0);
-
-    // Restore the operand stack.
-    __ lw(a0, FieldMemOperand(a1, JSGeneratorObject::kOperandStackOffset));
-    __ lw(a3, FieldMemOperand(a0, FixedArray::kLengthOffset));
-    __ Addu(a0, a0, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-    __ Lsa(a3, a0, a3, kPointerSizeLog2 - 1);
-    {
-      Label done_loop, loop;
-      __ bind(&loop);
-      __ Branch(&done_loop, eq, a0, Operand(a3));
-      __ lw(t1, MemOperand(a0));
-      __ Push(t1);
-      __ Branch(USE_DELAY_SLOT, &loop);
-      __ addiu(a0, a0, kPointerSize);  // In delay slot.
-      __ bind(&done_loop);
-    }
-
-    // Reset operand stack so we don't leak.
-    __ LoadRoot(t1, Heap::kEmptyFixedArrayRootIndex);
-    __ sw(t1, FieldMemOperand(a1, JSGeneratorObject::kOperandStackOffset));
-
-    // Resume the generator function at the continuation.
-    __ lw(a3, FieldMemOperand(t0, JSFunction::kSharedFunctionInfoOffset));
-    __ lw(a3, FieldMemOperand(a3, SharedFunctionInfo::kCodeOffset));
-    __ Addu(a3, a3, Operand(Code::kHeaderSize - kHeapObjectTag));
-    __ lw(a2, FieldMemOperand(a1, JSGeneratorObject::kContinuationOffset));
-    __ SmiUntag(a2);
-    __ Addu(a3, a3, Operand(a2));
-    __ li(a2, Operand(Smi::FromInt(JSGeneratorObject::kGeneratorExecuting)));
-    __ sw(a2, FieldMemOperand(a1, JSGeneratorObject::kContinuationOffset));
-    __ Move(v0, a1);  // Continuation expects generator object in v0.
-    __ Jump(a3);
-  }
-
-  __ bind(&prepare_step_in_if_stepping);
-  {
-    FrameScope scope(masm, StackFrame::INTERNAL);
-    __ Push(a1, a2, t0);
-    __ CallRuntime(Runtime::kDebugPrepareStepInIfStepping);
-    __ Pop(a1, a2);
-  }
-  __ Branch(USE_DELAY_SLOT, &stepping_prepared);
-  __ lw(t0, FieldMemOperand(a1, JSGeneratorObject::kFunctionOffset));
-
-  __ bind(&prepare_step_in_suspended_generator);
-  {
-    FrameScope scope(masm, StackFrame::INTERNAL);
-    __ Push(a1, a2);
-    __ CallRuntime(Runtime::kDebugPrepareStepInSuspendedGenerator);
-    __ Pop(a1, a2);
-  }
-  __ Branch(USE_DELAY_SLOT, &stepping_prepared);
-  __ lw(t0, FieldMemOperand(a1, JSGeneratorObject::kFunctionOffset));
-}
-
-static void LeaveInterpreterFrame(MacroAssembler* masm, Register scratch) {
-  Register args_count = scratch;
-
-  // Get the arguments + receiver count.
-  __ lw(args_count,
-        MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp));
-  __ lw(args_count,
-        FieldMemOperand(args_count, BytecodeArray::kParameterSizeOffset));
-
-  // Leave the frame (also dropping the register file).
-  __ LeaveFrame(StackFrame::JAVA_SCRIPT);
-
-  // Drop receiver + arguments.
-  __ Addu(sp, sp, args_count);
-}
-
-// 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:
-//   o a1: the JS function object being called.
-//   o a3: the new target
-//   o cp: our context
-//   o fp: the caller's frame pointer
-//   o sp: stack pointer
-//   o ra: 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);
-  __ PushStandardFrame(a1);
-
-  // Get the bytecode array from the function object (or from the DebugInfo if
-  // it is present) and load it into kInterpreterBytecodeArrayRegister.
-  __ lw(a0, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
-  Label load_debug_bytecode_array, bytecode_array_loaded;
-  Register debug_info = kInterpreterBytecodeArrayRegister;
-  DCHECK(!debug_info.is(a0));
-  __ lw(debug_info, FieldMemOperand(a0, SharedFunctionInfo::kDebugInfoOffset));
-  __ Branch(&load_debug_bytecode_array, ne, debug_info,
-            Operand(DebugInfo::uninitialized()));
-  __ lw(kInterpreterBytecodeArrayRegister,
-        FieldMemOperand(a0, SharedFunctionInfo::kFunctionDataOffset));
-  __ bind(&bytecode_array_loaded);
-
-  // Check function data field is actually a BytecodeArray object.
-  Label bytecode_array_not_present;
-  __ JumpIfRoot(kInterpreterBytecodeArrayRegister,
-                Heap::kUndefinedValueRootIndex, &bytecode_array_not_present);
-  if (FLAG_debug_code) {
-    __ SmiTst(kInterpreterBytecodeArrayRegister, t0);
-    __ Assert(ne, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry, t0,
-              Operand(zero_reg));
-    __ GetObjectType(kInterpreterBytecodeArrayRegister, t0, t0);
-    __ Assert(eq, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry, t0,
-              Operand(BYTECODE_ARRAY_TYPE));
-  }
-
-  // Load initial bytecode offset.
-  __ li(kInterpreterBytecodeOffsetRegister,
-        Operand(BytecodeArray::kHeaderSize - kHeapObjectTag));
-
-  // Push new.target, bytecode array and Smi tagged bytecode array offset.
-  __ SmiTag(t0, kInterpreterBytecodeOffsetRegister);
-  __ Push(a3, kInterpreterBytecodeArrayRegister, t0);
-
-  // Allocate the local and temporary register file on the stack.
-  {
-    // Load frame size from the BytecodeArray object.
-    __ lw(t0, FieldMemOperand(kInterpreterBytecodeArrayRegister,
-                              BytecodeArray::kFrameSizeOffset));
-
-    // Do a stack check to ensure we don't go over the limit.
-    Label ok;
-    __ Subu(t1, sp, Operand(t0));
-    __ LoadRoot(a2, Heap::kRealStackLimitRootIndex);
-    __ Branch(&ok, hs, t1, Operand(a2));
-    __ CallRuntime(Runtime::kThrowStackOverflow);
-    __ bind(&ok);
-
-    // If ok, push undefined as the initial value for all register file entries.
-    Label loop_header;
-    Label loop_check;
-    __ LoadRoot(t1, Heap::kUndefinedValueRootIndex);
-    __ Branch(&loop_check);
-    __ bind(&loop_header);
-    // TODO(rmcilroy): Consider doing more than one push per loop iteration.
-    __ push(t1);
-    // Continue loop if not done.
-    __ bind(&loop_check);
-    __ Subu(t0, t0, Operand(kPointerSize));
-    __ Branch(&loop_header, ge, t0, Operand(zero_reg));
-  }
-
-  // Load accumulator and dispatch table into registers.
-  __ LoadRoot(kInterpreterAccumulatorRegister, Heap::kUndefinedValueRootIndex);
-  __ li(kInterpreterDispatchTableRegister,
-        Operand(ExternalReference::interpreter_dispatch_table_address(
-            masm->isolate())));
-
-  // Dispatch to the first bytecode handler for the function.
-  __ Addu(a0, kInterpreterBytecodeArrayRegister,
-          kInterpreterBytecodeOffsetRegister);
-  __ lbu(a0, MemOperand(a0));
-  __ Lsa(at, kInterpreterDispatchTableRegister, a0, kPointerSizeLog2);
-  __ lw(at, MemOperand(at));
-  __ Call(at);
-  masm->isolate()->heap()->SetInterpreterEntryReturnPCOffset(masm->pc_offset());
-
-  // The return value is in v0.
-  LeaveInterpreterFrame(masm, t0);
-  __ Jump(ra);
-
-  // Load debug copy of the bytecode array.
-  __ bind(&load_debug_bytecode_array);
-  __ lw(kInterpreterBytecodeArrayRegister,
-        FieldMemOperand(debug_info, DebugInfo::kAbstractCodeIndex));
-  __ Branch(&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);
-  __ lw(t0, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
-  __ lw(t0, FieldMemOperand(t0, SharedFunctionInfo::kCodeOffset));
-  __ Addu(t0, t0, Operand(Code::kHeaderSize - kHeapObjectTag));
-  __ sw(t0, FieldMemOperand(a1, JSFunction::kCodeEntryOffset));
-  __ RecordWriteCodeEntryField(a1, t0, t1);
-  __ Jump(t0);
-}
-
-void Builtins::Generate_InterpreterMarkBaselineOnReturn(MacroAssembler* masm) {
-  // Save the function and context for call to CompileBaseline.
-  __ lw(a1, MemOperand(fp, StandardFrameConstants::kFunctionOffset));
-  __ lw(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, t0);
-
-  {
-    FrameScope frame_scope(masm, StackFrame::INTERNAL);
-    // Push return value.
-    __ push(v0);
-
-    // Push function as argument and compile for baseline.
-    __ push(a1);
-    __ CallRuntime(Runtime::kCompileBaseline);
-
-    // Restore return value.
-    __ pop(v0);
-  }
-  __ Jump(ra);
-}
-
-// static
-void Builtins::Generate_InterpreterPushArgsAndCallImpl(
-    MacroAssembler* masm, TailCallMode tail_call_mode,
-    CallableType function_type) {
-  // ----------- S t a t e -------------
-  //  -- a0 : the number of arguments (not including the receiver)
-  //  -- a2 : 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.
-  //  -- a1 : the target to call (can be any Object).
-  // -----------------------------------
-
-  // Find the address of the last argument.
-  __ Addu(a3, a0, Operand(1));  // Add one for receiver.
-  __ sll(a3, a3, kPointerSizeLog2);
-  __ Subu(a3, a2, Operand(a3));
-
-  // Push the arguments.
-  Label loop_header, loop_check;
-  __ Branch(&loop_check);
-  __ bind(&loop_header);
-  __ lw(t0, MemOperand(a2));
-  __ Addu(a2, a2, Operand(-kPointerSize));
-  __ push(t0);
-  __ bind(&loop_check);
-  __ Branch(&loop_header, gt, a2, Operand(a3));
-
-  // 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 -------------
-  // -- a0 : argument count (not including receiver)
-  // -- a3 : new target
-  // -- a1 : constructor to call
-  // -- a2 : address of the first argument
-  // -----------------------------------
-
-  // Find the address of the last argument.
-  __ sll(t0, a0, kPointerSizeLog2);
-  __ Subu(t0, a2, Operand(t0));
-
-  // Push a slot for the receiver.
-  __ push(zero_reg);
-
-  // Push the arguments.
-  Label loop_header, loop_check;
-  __ Branch(&loop_check);
-  __ bind(&loop_header);
-  __ lw(t1, MemOperand(a2));
-  __ Addu(a2, a2, Operand(-kPointerSize));
-  __ push(t1);
-  __ bind(&loop_check);
-  __ Branch(&loop_header, gt, a2, Operand(t0));
-
-  // Call the constructor with a0, a1, and a3 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));
-  __ li(t0, Operand(masm->isolate()->builtins()->InterpreterEntryTrampoline()));
-  __ Addu(ra, t0, Operand(interpreter_entry_return_pc_offset->value() +
-                          Code::kHeaderSize - kHeapObjectTag));
-
-  // Initialize the dispatch table register.
-  __ li(kInterpreterDispatchTableRegister,
-        Operand(ExternalReference::interpreter_dispatch_table_address(
-            masm->isolate())));
-
-  // Get the bytecode array pointer from the frame.
-  __ lw(kInterpreterBytecodeArrayRegister,
-        MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp));
-
-  if (FLAG_debug_code) {
-    // Check function data field is actually a BytecodeArray object.
-    __ SmiTst(kInterpreterBytecodeArrayRegister, at);
-    __ Assert(ne, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry, at,
-              Operand(zero_reg));
-    __ GetObjectType(kInterpreterBytecodeArrayRegister, a1, a1);
-    __ Assert(eq, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry, a1,
-              Operand(BYTECODE_ARRAY_TYPE));
-  }
-
-  // Get the target bytecode offset from the frame.
-  __ lw(kInterpreterBytecodeOffsetRegister,
-        MemOperand(fp, InterpreterFrameConstants::kBytecodeOffsetFromFp));
-  __ SmiUntag(kInterpreterBytecodeOffsetRegister);
-
-  // Dispatch to the target bytecode.
-  __ Addu(a1, kInterpreterBytecodeArrayRegister,
-          kInterpreterBytecodeOffsetRegister);
-  __ lbu(a1, MemOperand(a1));
-  __ Lsa(a1, kInterpreterDispatchTableRegister, a1, kPointerSizeLog2);
-  __ lw(a1, MemOperand(a1));
-  __ Jump(a1);
-}
-
-void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0 : argument count (preserved for callee)
-  //  -- a3 : new target (preserved for callee)
-  //  -- a1 : target function (preserved for callee)
-  // -----------------------------------
-  // First lookup code, maybe we don't need to compile!
-  Label gotta_call_runtime, gotta_call_runtime_no_stack;
-  Label maybe_call_runtime;
-  Label try_shared;
-  Label loop_top, loop_bottom;
-
-  Register argument_count = a0;
-  Register closure = a1;
-  Register new_target = a3;
-  __ push(argument_count);
-  __ push(new_target);
-  __ push(closure);
-
-  Register map = a0;
-  Register index = a2;
-  __ lw(map, FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset));
-  __ lw(map, FieldMemOperand(map, SharedFunctionInfo::kOptimizedCodeMapOffset));
-  __ lw(index, FieldMemOperand(map, FixedArray::kLengthOffset));
-  __ Branch(&gotta_call_runtime, lt, index, Operand(Smi::FromInt(2)));
-
-  // Find literals.
-  // a3  : native context
-  // a2  : length / index
-  // a0  : optimized code map
-  // stack[0] : new target
-  // stack[4] : closure
-  Register native_context = a3;
-  __ lw(native_context, NativeContextMemOperand());
-
-  __ bind(&loop_top);
-  Register temp = a1;
-  Register array_pointer = t1;
-
-  // Does the native context match?
-  __ sll(at, index, kPointerSizeLog2 - kSmiTagSize);
-  __ Addu(array_pointer, map, Operand(at));
-  __ lw(temp, FieldMemOperand(array_pointer,
-                              SharedFunctionInfo::kOffsetToPreviousContext));
-  __ lw(temp, FieldMemOperand(temp, WeakCell::kValueOffset));
-  __ Branch(&loop_bottom, ne, temp, Operand(native_context));
-  // OSR id set to none?
-  __ lw(temp, FieldMemOperand(array_pointer,
-                              SharedFunctionInfo::kOffsetToPreviousOsrAstId));
-  const int bailout_id = BailoutId::None().ToInt();
-  __ Branch(&loop_bottom, ne, temp, Operand(Smi::FromInt(bailout_id)));
-
-  // Literals available?
-  Label got_literals, maybe_cleared_weakcell;
-  __ lw(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);
-  __ lw(t0, FieldMemOperand(temp, WeakCell::kValueOffset));
-  __ JumpIfSmi(t0, &maybe_cleared_weakcell);
-  // t0 is a pointer, therefore temp is a WeakCell pointing to a literals array.
-  __ lw(temp, FieldMemOperand(temp, WeakCell::kValueOffset));
-  __ jmp(&got_literals);
-
-  // t0 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);
-  __ Branch(&gotta_call_runtime, eq, t0, Operand(Smi::FromInt(0)));
-
-  // Save the literals in the closure.
-  __ bind(&got_literals);
-  __ lw(t0, MemOperand(sp, 0));
-  __ sw(temp, FieldMemOperand(t0, JSFunction::kLiteralsOffset));
-  __ push(index);
-  __ RecordWriteField(t0, JSFunction::kLiteralsOffset, temp, index,
-                      kRAHasNotBeenSaved, kDontSaveFPRegs, EMIT_REMEMBERED_SET,
-                      OMIT_SMI_CHECK);
-  __ pop(index);
-
-  // Code available?
-  Register entry = t0;
-  __ lw(entry,
-        FieldMemOperand(array_pointer,
-                        SharedFunctionInfo::kOffsetToPreviousCachedCode));
-  __ lw(entry, FieldMemOperand(entry, WeakCell::kValueOffset));
-  __ JumpIfSmi(entry, &maybe_call_runtime);
-
-  // Found literals and code. Get them into the closure and return.
-  __ pop(closure);
-  // Store code entry in the closure.
-  __ Addu(entry, entry, Operand(Code::kHeaderSize - kHeapObjectTag));
-
-  Label install_optimized_code_and_tailcall;
-  __ bind(&install_optimized_code_and_tailcall);
-  __ sw(entry, FieldMemOperand(closure, JSFunction::kCodeEntryOffset));
-  __ RecordWriteCodeEntryField(closure, entry, t1);
-
-  // Link the closure into the optimized function list.
-  // t0 : code entry
-  // a3 : native context
-  // a1 : closure
-  __ lw(t1,
-        ContextMemOperand(native_context, Context::OPTIMIZED_FUNCTIONS_LIST));
-  __ sw(t1, FieldMemOperand(closure, JSFunction::kNextFunctionLinkOffset));
-  __ RecordWriteField(closure, JSFunction::kNextFunctionLinkOffset, t1, a0,
-                      kRAHasNotBeenSaved, kDontSaveFPRegs, EMIT_REMEMBERED_SET,
-                      OMIT_SMI_CHECK);
-  const int function_list_offset =
-      Context::SlotOffset(Context::OPTIMIZED_FUNCTIONS_LIST);
-  __ sw(closure,
-        ContextMemOperand(native_context, Context::OPTIMIZED_FUNCTIONS_LIST));
-  // Save closure before the write barrier.
-  __ mov(t1, closure);
-  __ RecordWriteContextSlot(native_context, function_list_offset, closure, a0,
-                            kRAHasNotBeenSaved, kDontSaveFPRegs);
-  __ mov(closure, t1);
-  __ pop(new_target);
-  __ pop(argument_count);
-  __ Jump(entry);
-
-  __ bind(&loop_bottom);
-  __ Subu(index, index,
-          Operand(Smi::FromInt(SharedFunctionInfo::kEntryLength)));
-  __ Branch(&loop_top, gt, index, Operand(Smi::FromInt(1)));
-
-  // We found neither literals nor code.
-  __ jmp(&gotta_call_runtime);
-
-  __ bind(&maybe_call_runtime);
-  __ pop(closure);
-
-  // Last possibility. Check the context free optimized code map entry.
-  __ lw(entry, FieldMemOperand(map, FixedArray::kHeaderSize +
-                                        SharedFunctionInfo::kSharedCodeIndex));
-  __ lw(entry, FieldMemOperand(entry, WeakCell::kValueOffset));
-  __ JumpIfSmi(entry, &try_shared);
-
-  // Store code entry in the closure.
-  __ Addu(entry, entry, Operand(Code::kHeaderSize - kHeapObjectTag));
-  __ jmp(&install_optimized_code_and_tailcall);
-
-  __ bind(&try_shared);
-  __ pop(new_target);
-  __ pop(argument_count);
-  // Is the full code valid?
-  __ lw(entry, FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset));
-  __ lw(entry, FieldMemOperand(entry, SharedFunctionInfo::kCodeOffset));
-  __ lw(t1, FieldMemOperand(entry, Code::kFlagsOffset));
-  __ And(t1, t1, Operand(Code::KindField::kMask));
-  __ srl(t1, t1, Code::KindField::kShift);
-  __ Branch(&gotta_call_runtime_no_stack, eq, t1, Operand(Code::BUILTIN));
-  // Yes, install the full code.
-  __ Addu(entry, entry, Operand(Code::kHeaderSize - kHeapObjectTag));
-  __ sw(entry, FieldMemOperand(closure, JSFunction::kCodeEntryOffset));
-  __ RecordWriteCodeEntryField(closure, entry, t1);
-  __ Jump(entry);
-
-  __ bind(&gotta_call_runtime);
-  __ pop(closure);
-  __ pop(new_target);
-  __ pop(argument_count);
-  __ bind(&gotta_call_runtime_no_stack);
-  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 -------------
-  //  -- a0 : argument count (preserved for callee)
-  //  -- a1 : new target (preserved for callee)
-  //  -- a3 : target function (preserved for callee)
-  // -----------------------------------
-  Label failed;
-  {
-    FrameScope scope(masm, StackFrame::INTERNAL);
-    // Push a copy of the target function and the new target.
-    // Push function as parameter to the runtime call.
-    __ SmiTag(a0);
-    __ Push(a0, a1, a3, a1);
-
-    // Copy arguments from caller (stdlib, foreign, heap).
-    for (int i = 2; i >= 0; --i) {
-      __ lw(a3, MemOperand(fp, StandardFrameConstants::kCallerSPOffset +
-                                   i * kPointerSize));
-      __ push(a3);
-    }
-    // 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(a0, &failed);
-    scope.GenerateLeaveFrame();
-    __ Drop(4);
-    __ Ret();
-
-    __ bind(&failed);
-    // Restore target function and new target.
-    __ Pop(a0, a1, a3);
-    __ SmiUntag(a0);
-  }
-  // 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 faster, since we shouldn't have to do stack
-  // crawls in MakeCodeYoung. This seems a bit fragile.
-
-  // Set a0 to point to the head of the PlatformCodeAge sequence.
-  __ Subu(a0, a0,
-      Operand(kNoCodeAgeSequenceLength - Assembler::kInstrSize));
-
-  // The following registers must be saved and restored when calling through to
-  // the runtime:
-  //   a0 - contains return address (beginning of patch sequence)
-  //   a1 - isolate
-  //   a3 - new target
-  RegList saved_regs =
-      (a0.bit() | a1.bit() | a3.bit() | ra.bit() | fp.bit()) & ~sp.bit();
-  FrameScope scope(masm, StackFrame::MANUAL);
-  __ MultiPush(saved_regs);
-  __ PrepareCallCFunction(2, 0, a2);
-  __ li(a1, Operand(ExternalReference::isolate_address(masm->isolate())));
-  __ CallCFunction(
-      ExternalReference::get_make_code_young_function(masm->isolate()), 2);
-  __ MultiPop(saved_regs);
-  __ Jump(a0);
-}
-
-#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.
-
-  // Set a0 to point to the head of the PlatformCodeAge sequence.
-  __ Subu(a0, a0,
-      Operand(kNoCodeAgeSequenceLength - Assembler::kInstrSize));
-
-  // The following registers must be saved and restored when calling through to
-  // the runtime:
-  //   a0 - contains return address (beginning of patch sequence)
-  //   a1 - isolate
-  //   a3 - new target
-  RegList saved_regs =
-      (a0.bit() | a1.bit() | a3.bit() | ra.bit() | fp.bit()) & ~sp.bit();
-  FrameScope scope(masm, StackFrame::MANUAL);
-  __ MultiPush(saved_regs);
-  __ PrepareCallCFunction(2, 0, a2);
-  __ li(a1, Operand(ExternalReference::isolate_address(masm->isolate())));
-  __ CallCFunction(
-      ExternalReference::get_mark_code_as_executed_function(masm->isolate()),
-      2);
-  __ MultiPop(saved_regs);
-
-  // Perform prologue operations usually performed by the young code stub.
-  __ PushStandardFrame(a1);
-
-  // Jump to point after the code-age stub.
-  __ Addu(a0, a0, Operand(kNoCodeAgeSequenceLength));
-  __ Jump(a0);
-}
-
-
-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.
-    __ MultiPush(kJSCallerSaved | kCalleeSaved);
-    // Pass the function and deoptimization type to the runtime system.
-    __ CallRuntime(Runtime::kNotifyStubFailure, save_doubles);
-    __ MultiPop(kJSCallerSaved | kCalleeSaved);
-  }
-
-  __ Addu(sp, sp, Operand(kPointerSize));  // Ignore state
-  __ Jump(ra);  // Jump to miss handler
-}
-
-
-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 function and deoptimization type to the runtime system.
-    __ li(a0, Operand(Smi::FromInt(static_cast<int>(type))));
-    __ push(a0);
-    __ CallRuntime(Runtime::kNotifyDeoptimized);
-  }
-
-  // Get the full codegen state from the stack and untag it -> t2.
-  __ lw(t2, MemOperand(sp, 0 * kPointerSize));
-  __ SmiUntag(t2);
-  // Switch on the state.
-  Label with_tos_register, unknown_state;
-  __ Branch(&with_tos_register, ne, t2,
-            Operand(static_cast<int>(Deoptimizer::BailoutState::NO_REGISTERS)));
-  __ Ret(USE_DELAY_SLOT);
-  // Safe to fill delay slot Addu will emit one instruction.
-  __ Addu(sp, sp, Operand(1 * kPointerSize));  // Remove state.
-
-  __ bind(&with_tos_register);
-  DCHECK_EQ(kInterpreterAccumulatorRegister.code(), v0.code());
-  __ lw(v0, MemOperand(sp, 1 * kPointerSize));
-  __ Branch(&unknown_state, ne, t2,
-            Operand(static_cast<int>(Deoptimizer::BailoutState::TOS_REGISTER)));
-
-  __ Ret(USE_DELAY_SLOT);
-  // Safe to fill delay slot Addu will emit one instruction.
-  __ Addu(sp, sp, Operand(2 * kPointerSize));  // Remove state.
-
-  __ bind(&unknown_state);
-  __ stop("no cases left");
-}
-
-
-void Builtins::Generate_NotifyDeoptimized(MacroAssembler* masm) {
-  Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::EAGER);
-}
-
-
-void Builtins::Generate_NotifySoftDeoptimized(MacroAssembler* masm) {
-  Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::SOFT);
-}
-
-
-void Builtins::Generate_NotifyLazyDeoptimized(MacroAssembler* masm) {
-  Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::LAZY);
-}
-
-
-// Clobbers {t2, t3, t4, t5}.
-static void CompatibleReceiverCheck(MacroAssembler* masm, Register receiver,
-                                    Register function_template_info,
-                                    Label* receiver_check_failed) {
-  Register signature = t2;
-  Register map = t3;
-  Register constructor = t4;
-  Register scratch = t5;
-
-  // If there is no signature, return the holder.
-  __ lw(signature, FieldMemOperand(function_template_info,
-                                   FunctionTemplateInfo::kSignatureOffset));
-  Label receiver_check_passed;
-  __ JumpIfRoot(signature, Heap::kUndefinedValueRootIndex,
-                &receiver_check_passed);
-
-  // Walk the prototype chain.
-  __ lw(map, FieldMemOperand(receiver, HeapObject::kMapOffset));
-  Label prototype_loop_start;
-  __ bind(&prototype_loop_start);
-
-  // Get the constructor, if any.
-  __ GetMapConstructor(constructor, map, scratch, scratch);
-  Label next_prototype;
-  __ Branch(&next_prototype, ne, scratch, Operand(JS_FUNCTION_TYPE));
-  Register type = constructor;
-  __ lw(type,
-        FieldMemOperand(constructor, JSFunction::kSharedFunctionInfoOffset));
-  __ lw(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.
-  __ Branch(&receiver_check_passed, eq, signature, Operand(type),
-            USE_DELAY_SLOT);
-
-  // If the current type is not a FunctionTemplateInfo, load the next prototype
-  // in the chain.
-  __ JumpIfSmi(type, &next_prototype);
-  __ GetObjectType(type, scratch, scratch);
-  __ Branch(&next_prototype, ne, scratch, Operand(FUNCTION_TEMPLATE_INFO_TYPE));
-
-  // Otherwise load the parent function template and iterate.
-  __ lw(type,
-        FieldMemOperand(type, FunctionTemplateInfo::kParentTemplateOffset));
-  __ Branch(&function_template_loop);
-
-  // Load the next prototype and iterate.
-  __ bind(&next_prototype);
-  __ lw(scratch, FieldMemOperand(map, Map::kBitField3Offset));
-  __ DecodeField<Map::HasHiddenPrototype>(scratch);
-  __ Branch(receiver_check_failed, eq, scratch, Operand(zero_reg));
-  __ lw(receiver, FieldMemOperand(map, Map::kPrototypeOffset));
-  __ lw(map, FieldMemOperand(receiver, HeapObject::kMapOffset));
-
-  __ Branch(&prototype_loop_start);
-
-  __ bind(&receiver_check_passed);
-}
-
-
-void Builtins::Generate_HandleFastApiCall(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0                 : number of arguments excluding receiver
-  //  -- a1                 : callee
-  //  -- ra                 : return address
-  //  -- sp[0]              : last argument
-  //  -- ...
-  //  -- sp[4 * (argc - 1)] : first argument
-  //  -- sp[4 * argc]       : receiver
-  // -----------------------------------
-
-  // Load the FunctionTemplateInfo.
-  __ lw(t1, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
-  __ lw(t1, FieldMemOperand(t1, SharedFunctionInfo::kFunctionDataOffset));
-
-  // Do the compatible receiver check.
-  Label receiver_check_failed;
-  __ Lsa(t8, sp, a0, kPointerSizeLog2);
-  __ lw(t0, MemOperand(t8));
-  CompatibleReceiverCheck(masm, t0, t1, &receiver_check_failed);
-
-  // Get the callback offset from the FunctionTemplateInfo, and jump to the
-  // beginning of the code.
-  __ lw(t2, FieldMemOperand(t1, FunctionTemplateInfo::kCallCodeOffset));
-  __ lw(t2, FieldMemOperand(t2, CallHandlerInfo::kFastHandlerOffset));
-  __ Addu(t2, t2, Operand(Code::kHeaderSize - kHeapObjectTag));
-  __ Jump(t2);
-
-  // Compatible receiver check failed: throw an Illegal Invocation exception.
-  __ bind(&receiver_check_failed);
-  // Drop the arguments (including the receiver);
-  __ Addu(t8, t8, Operand(kPointerSize));
-  __ addu(sp, t8, zero_reg);
-  __ TailCallRuntime(Runtime::kThrowIllegalInvocation);
-}
-
-
-void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) {
-  // Lookup the function in the JavaScript frame.
-  __ lw(a0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
-  {
-    FrameScope scope(masm, StackFrame::INTERNAL);
-    // Pass function as argument.
-    __ push(a0);
-    __ CallRuntime(Runtime::kCompileForOnStackReplacement);
-  }
-
-  // If the code object is null, just return to the unoptimized code.
-  __ Ret(eq, v0, Operand(Smi::FromInt(0)));
-
-  // Load deoptimization data from the code object.
-  // <deopt_data> = <code>[#deoptimization_data_offset]
-  __ lw(a1, MemOperand(v0, Code::kDeoptimizationDataOffset - kHeapObjectTag));
-
-  // Load the OSR entrypoint offset from the deoptimization data.
-  // <osr_offset> = <deopt_data>[#header_size + #osr_pc_offset]
-  __ lw(a1, MemOperand(a1, FixedArray::OffsetOfElementAt(
-      DeoptimizationInputData::kOsrPcOffsetIndex) - kHeapObjectTag));
-  __ SmiUntag(a1);
-
-  // Compute the target address = code_obj + header_size + osr_offset
-  // <entry_addr> = <code_obj> + #header_size + <osr_offset>
-  __ addu(v0, v0, a1);
-  __ addiu(ra, v0, 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 -------------
-  //  -- a0    : number of arguments
-  //  -- a1    : function
-  //  -- cp    : context
-  //  -- sp[0] : receiver
-  // -----------------------------------
-
-  // 1. Pop receiver into a0 and check that it's actually a JSDate object.
-  Label receiver_not_date;
-  {
-    __ Pop(a0);
-    __ JumpIfSmi(a0, &receiver_not_date);
-    __ GetObjectType(a0, t0, t0);
-    __ Branch(&receiver_not_date, ne, t0, Operand(JS_DATE_TYPE));
-  }
-
-  // 2. Load the specified date field, falling back to the runtime as necessary.
-  if (field_index == JSDate::kDateValue) {
-    __ Ret(USE_DELAY_SLOT);
-    __ lw(v0, FieldMemOperand(a0, JSDate::kValueOffset));  // In delay slot.
-  } else {
-    if (field_index < JSDate::kFirstUncachedField) {
-      Label stamp_mismatch;
-      __ li(a1, Operand(ExternalReference::date_cache_stamp(masm->isolate())));
-      __ lw(a1, MemOperand(a1));
-      __ lw(t0, FieldMemOperand(a0, JSDate::kCacheStampOffset));
-      __ Branch(&stamp_mismatch, ne, t0, Operand(a1));
-      __ Ret(USE_DELAY_SLOT);
-      __ lw(v0, FieldMemOperand(
-                    a0, JSDate::kValueOffset +
-                            field_index * kPointerSize));  // In delay slot.
-      __ bind(&stamp_mismatch);
-    }
-    FrameScope scope(masm, StackFrame::INTERNAL);
-    __ PrepareCallCFunction(2, t0);
-    __ li(a1, Operand(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(a0);
-    __ Move(a0, Smi::FromInt(0));
-    __ EnterBuiltinFrame(cp, a1, a0);
-    __ CallRuntime(Runtime::kThrowNotDateError);
-  }
-}
-
-// static
-void Builtins::Generate_FunctionPrototypeApply(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0    : argc
-  //  -- sp[0] : argArray
-  //  -- sp[4] : thisArg
-  //  -- sp[8] : receiver
-  // -----------------------------------
-
-  // 1. Load receiver into a1, argArray into a0 (if present), remove all
-  // arguments from the stack (including the receiver), and push thisArg (if
-  // present) instead.
-  {
-    Label no_arg;
-    Register scratch = t0;
-    __ LoadRoot(a2, Heap::kUndefinedValueRootIndex);
-    __ mov(a3, a2);
-    // Lsa() cannot be used hare as scratch value used later.
-    __ sll(scratch, a0, kPointerSizeLog2);
-    __ Addu(a0, sp, Operand(scratch));
-    __ lw(a1, MemOperand(a0));  // receiver
-    __ Subu(a0, a0, Operand(kPointerSize));
-    __ Branch(&no_arg, lt, a0, Operand(sp));
-    __ lw(a2, MemOperand(a0));  // thisArg
-    __ Subu(a0, a0, Operand(kPointerSize));
-    __ Branch(&no_arg, lt, a0, Operand(sp));
-    __ lw(a3, MemOperand(a0));  // argArray
-    __ bind(&no_arg);
-    __ Addu(sp, sp, Operand(scratch));
-    __ sw(a2, MemOperand(sp));
-    __ mov(a0, a3);
-  }
-
-  // ----------- S t a t e -------------
-  //  -- a0    : argArray
-  //  -- a1    : receiver
-  //  -- sp[0] : thisArg
-  // -----------------------------------
-
-  // 2. Make sure the receiver is actually callable.
-  Label receiver_not_callable;
-  __ JumpIfSmi(a1, &receiver_not_callable);
-  __ lw(t0, FieldMemOperand(a1, HeapObject::kMapOffset));
-  __ lbu(t0, FieldMemOperand(t0, Map::kBitFieldOffset));
-  __ And(t0, t0, Operand(1 << Map::kIsCallable));
-  __ Branch(&receiver_not_callable, eq, t0, Operand(zero_reg));
-
-  // 3. Tail call with no arguments if argArray is null or undefined.
-  Label no_arguments;
-  __ JumpIfRoot(a0, Heap::kNullValueRootIndex, &no_arguments);
-  __ JumpIfRoot(a0, Heap::kUndefinedValueRootIndex, &no_arguments);
-
-  // 4a. Apply the receiver to the given argArray (passing undefined for
-  // new.target).
-  __ LoadRoot(a3, Heap::kUndefinedValueRootIndex);
-  __ 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(a0, zero_reg);
-    __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
-  }
-
-  // 4c. The receiver is not callable, throw an appropriate TypeError.
-  __ bind(&receiver_not_callable);
-  {
-    __ sw(a1, MemOperand(sp));
-    __ TailCallRuntime(Runtime::kThrowApplyNonFunction);
-  }
-}
-
-
-// static
-void Builtins::Generate_FunctionPrototypeCall(MacroAssembler* masm) {
-  // 1. Make sure we have at least one argument.
-  // a0: actual number of arguments
-  {
-    Label done;
-    __ Branch(&done, ne, a0, Operand(zero_reg));
-    __ PushRoot(Heap::kUndefinedValueRootIndex);
-    __ Addu(a0, a0, Operand(1));
-    __ bind(&done);
-  }
-
-  // 2. Get the function to call (passed as receiver) from the stack.
-  // a0: actual number of arguments
-  __ Lsa(at, sp, a0, kPointerSizeLog2);
-  __ lw(a1, MemOperand(at));
-
-  // 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.
-  // a0: actual number of arguments
-  // a1: function
-  {
-    Label loop;
-    // Calculate the copy start address (destination). Copy end address is sp.
-    __ Lsa(a2, sp, a0, kPointerSizeLog2);
-
-    __ bind(&loop);
-    __ lw(at, MemOperand(a2, -kPointerSize));
-    __ sw(at, MemOperand(a2));
-    __ Subu(a2, a2, Operand(kPointerSize));
-    __ Branch(&loop, ne, a2, Operand(sp));
-    // Adjust the actual number of arguments and remove the top element
-    // (which is a copy of the last argument).
-    __ Subu(a0, a0, Operand(1));
-    __ Pop();
-  }
-
-  // 4. Call the callable.
-  __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
-}
-
-
-void Builtins::Generate_ReflectApply(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0     : argc
-  //  -- sp[0]  : argumentsList
-  //  -- sp[4]  : thisArgument
-  //  -- sp[8]  : target
-  //  -- sp[12] : receiver
-  // -----------------------------------
-
-  // 1. Load target into a1 (if present), argumentsList into a0 (if present),
-  // remove all arguments from the stack (including the receiver), and push
-  // thisArgument (if present) instead.
-  {
-    Label no_arg;
-    Register scratch = t0;
-    __ LoadRoot(a1, Heap::kUndefinedValueRootIndex);
-    __ mov(a2, a1);
-    __ mov(a3, a1);
-    __ sll(scratch, a0, kPointerSizeLog2);
-    __ mov(a0, scratch);
-    __ Subu(a0, a0, Operand(kPointerSize));
-    __ Branch(&no_arg, lt, a0, Operand(zero_reg));
-    __ Addu(a0, sp, Operand(a0));
-    __ lw(a1, MemOperand(a0));  // target
-    __ Subu(a0, a0, Operand(kPointerSize));
-    __ Branch(&no_arg, lt, a0, Operand(sp));
-    __ lw(a2, MemOperand(a0));  // thisArgument
-    __ Subu(a0, a0, Operand(kPointerSize));
-    __ Branch(&no_arg, lt, a0, Operand(sp));
-    __ lw(a3, MemOperand(a0));  // argumentsList
-    __ bind(&no_arg);
-    __ Addu(sp, sp, Operand(scratch));
-    __ sw(a2, MemOperand(sp));
-    __ mov(a0, a3);
-  }
-
-  // ----------- S t a t e -------------
-  //  -- a0    : argumentsList
-  //  -- a1    : target
-  //  -- sp[0] : thisArgument
-  // -----------------------------------
-
-  // 2. Make sure the target is actually callable.
-  Label target_not_callable;
-  __ JumpIfSmi(a1, &target_not_callable);
-  __ lw(t0, FieldMemOperand(a1, HeapObject::kMapOffset));
-  __ lbu(t0, FieldMemOperand(t0, Map::kBitFieldOffset));
-  __ And(t0, t0, Operand(1 << Map::kIsCallable));
-  __ Branch(&target_not_callable, eq, t0, Operand(zero_reg));
-
-  // 3a. Apply the target to the given argumentsList (passing undefined for
-  // new.target).
-  __ LoadRoot(a3, Heap::kUndefinedValueRootIndex);
-  __ Jump(masm->isolate()->builtins()->Apply(), RelocInfo::CODE_TARGET);
-
-  // 3b. The target is not callable, throw an appropriate TypeError.
-  __ bind(&target_not_callable);
-  {
-    __ sw(a1, MemOperand(sp));
-    __ TailCallRuntime(Runtime::kThrowApplyNonFunction);
-  }
-}
-
-
-void Builtins::Generate_ReflectConstruct(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0     : argc
-  //  -- sp[0]  : new.target (optional)
-  //  -- sp[4]  : argumentsList
-  //  -- sp[8]  : target
-  //  -- sp[12] : receiver
-  // -----------------------------------
-
-  // 1. Load target into a1 (if present), argumentsList into a0 (if present),
-  // new.target into a3 (if present, otherwise use target), remove all
-  // arguments from the stack (including the receiver), and push thisArgument
-  // (if present) instead.
-  {
-    Label no_arg;
-    Register scratch = t0;
-    __ LoadRoot(a1, Heap::kUndefinedValueRootIndex);
-    __ mov(a2, a1);
-    // Lsa() cannot be used hare as scratch value used later.
-    __ sll(scratch, a0, kPointerSizeLog2);
-    __ Addu(a0, sp, Operand(scratch));
-    __ sw(a2, MemOperand(a0));  // receiver
-    __ Subu(a0, a0, Operand(kPointerSize));
-    __ Branch(&no_arg, lt, a0, Operand(sp));
-    __ lw(a1, MemOperand(a0));  // target
-    __ mov(a3, a1);             // new.target defaults to target
-    __ Subu(a0, a0, Operand(kPointerSize));
-    __ Branch(&no_arg, lt, a0, Operand(sp));
-    __ lw(a2, MemOperand(a0));  // argumentsList
-    __ Subu(a0, a0, Operand(kPointerSize));
-    __ Branch(&no_arg, lt, a0, Operand(sp));
-    __ lw(a3, MemOperand(a0));  // new.target
-    __ bind(&no_arg);
-    __ Addu(sp, sp, Operand(scratch));
-    __ mov(a0, a2);
-  }
-
-  // ----------- S t a t e -------------
-  //  -- a0    : argumentsList
-  //  -- a3    : new.target
-  //  -- a1    : target
-  //  -- sp[0] : receiver (undefined)
-  // -----------------------------------
-
-  // 2. Make sure the target is actually a constructor.
-  Label target_not_constructor;
-  __ JumpIfSmi(a1, &target_not_constructor);
-  __ lw(t0, FieldMemOperand(a1, HeapObject::kMapOffset));
-  __ lbu(t0, FieldMemOperand(t0, Map::kBitFieldOffset));
-  __ And(t0, t0, Operand(1 << Map::kIsConstructor));
-  __ Branch(&target_not_constructor, eq, t0, Operand(zero_reg));
-
-  // 3. Make sure the target is actually a constructor.
-  Label new_target_not_constructor;
-  __ JumpIfSmi(a3, &new_target_not_constructor);
-  __ lw(t0, FieldMemOperand(a3, HeapObject::kMapOffset));
-  __ lbu(t0, FieldMemOperand(t0, Map::kBitFieldOffset));
-  __ And(t0, t0, Operand(1 << Map::kIsConstructor));
-  __ Branch(&new_target_not_constructor, eq, t0, Operand(zero_reg));
-
-  // 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);
-  {
-    __ sw(a1, MemOperand(sp));
-    __ TailCallRuntime(Runtime::kThrowCalledNonCallable);
-  }
-
-  // 4c. The new.target is not a constructor, throw an appropriate TypeError.
-  __ bind(&new_target_not_constructor);
-  {
-    __ sw(a3, MemOperand(sp));
-    __ TailCallRuntime(Runtime::kThrowCalledNonCallable);
-  }
-}
-
-
-static void ArgumentAdaptorStackCheck(MacroAssembler* masm,
-                                      Label* stack_overflow) {
-  // ----------- S t a t e -------------
-  //  -- a0 : actual number of arguments
-  //  -- a1 : function (passed through to callee)
-  //  -- a2 : expected number of arguments
-  //  -- a3 : 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.
-  __ LoadRoot(t1, Heap::kRealStackLimitRootIndex);
-  // Make t1 the space we have left. The stack might already be overflowed
-  // here which will cause t1 to become negative.
-  __ subu(t1, sp, t1);
-  // Check if the arguments will overflow the stack.
-  __ sll(at, a2, kPointerSizeLog2);
-  // Signed comparison.
-  __ Branch(stack_overflow, le, t1, Operand(at));
-}
-
-
-static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) {
-  __ sll(a0, a0, kSmiTagSize);
-  __ li(t0, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
-  __ MultiPush(a0.bit() | a1.bit() | t0.bit() | fp.bit() | ra.bit());
-  __ Addu(fp, sp,
-      Operand(StandardFrameConstants::kFixedFrameSizeFromFp + kPointerSize));
-}
-
-
-static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- v0 : result being passed through
-  // -----------------------------------
-  // Get the number of arguments passed (as a smi), tear down the frame and
-  // then tear down the parameters.
-  __ lw(a1, MemOperand(fp, -(StandardFrameConstants::kFixedFrameSizeFromFp +
-                             kPointerSize)));
-  __ mov(sp, fp);
-  __ MultiPop(fp.bit() | ra.bit());
-  __ Lsa(sp, sp, a1, kPointerSizeLog2 - kSmiTagSize);
-  // Adjust for the receiver.
-  __ Addu(sp, sp, Operand(kPointerSize));
-}
-
-
-// static
-void Builtins::Generate_Apply(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0    : argumentsList
-  //  -- a1    : target
-  //  -- a3    : new.target (checked to be constructor or undefined)
-  //  -- sp[0] : thisArgument
-  // -----------------------------------
-
-  // Create the list of arguments from the array-like argumentsList.
-  {
-    Label create_arguments, create_array, create_runtime, done_create;
-    __ JumpIfSmi(a0, &create_runtime);
-
-    // Load the map of argumentsList into a2.
-    __ lw(a2, FieldMemOperand(a0, HeapObject::kMapOffset));
-
-    // Load native context into t0.
-    __ lw(t0, NativeContextMemOperand());
-
-    // Check if argumentsList is an (unmodified) arguments object.
-    __ lw(at, ContextMemOperand(t0, Context::SLOPPY_ARGUMENTS_MAP_INDEX));
-    __ Branch(&create_arguments, eq, a2, Operand(at));
-    __ lw(at, ContextMemOperand(t0, Context::STRICT_ARGUMENTS_MAP_INDEX));
-    __ Branch(&create_arguments, eq, a2, Operand(at));
-
-    // Check if argumentsList is a fast JSArray.
-    __ lw(v0, FieldMemOperand(a2, HeapObject::kMapOffset));
-    __ lbu(v0, FieldMemOperand(v0, Map::kInstanceTypeOffset));
-    __ Branch(&create_array, eq, v0, Operand(JS_ARRAY_TYPE));
-
-    // Ask the runtime to create the list (actually a FixedArray).
-    __ bind(&create_runtime);
-    {
-      FrameScope scope(masm, StackFrame::INTERNAL);
-      __ Push(a1, a3, a0);
-      __ CallRuntime(Runtime::kCreateListFromArrayLike);
-      __ mov(a0, v0);
-      __ Pop(a1, a3);
-      __ lw(a2, FieldMemOperand(v0, FixedArray::kLengthOffset));
-      __ SmiUntag(a2);
-    }
-    __ Branch(&done_create);
-
-    // Try to create the list from an arguments object.
-    __ bind(&create_arguments);
-    __ lw(a2, FieldMemOperand(a0, JSArgumentsObject::kLengthOffset));
-    __ lw(t0, FieldMemOperand(a0, JSObject::kElementsOffset));
-    __ lw(at, FieldMemOperand(t0, FixedArray::kLengthOffset));
-    __ Branch(&create_runtime, ne, a2, Operand(at));
-    __ SmiUntag(a2);
-    __ mov(a0, t0);
-    __ Branch(&done_create);
-
-    // Try to create the list from a JSArray object.
-    __ bind(&create_array);
-    __ lw(a2, FieldMemOperand(a2, Map::kBitField2Offset));
-    __ DecodeField<Map::ElementsKindBits>(a2);
-    STATIC_ASSERT(FAST_SMI_ELEMENTS == 0);
-    STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1);
-    STATIC_ASSERT(FAST_ELEMENTS == 2);
-    __ Branch(&create_runtime, hi, a2, Operand(FAST_ELEMENTS));
-    __ Branch(&create_runtime, eq, a2, Operand(FAST_HOLEY_SMI_ELEMENTS));
-    __ lw(a2, FieldMemOperand(a0, JSArray::kLengthOffset));
-    __ lw(a0, FieldMemOperand(a0, JSArray::kElementsOffset));
-    __ SmiUntag(a2);
-
-    __ 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(t0, Heap::kRealStackLimitRootIndex);
-    // Make ip the space we have left. The stack might already be overflowed
-    // here which will cause ip to become negative.
-    __ Subu(t0, sp, t0);
-    // Check if the arguments will overflow the stack.
-    __ sll(at, a2, kPointerSizeLog2);
-    __ Branch(&done, gt, t0, Operand(at));  // Signed comparison.
-    __ TailCallRuntime(Runtime::kThrowStackOverflow);
-    __ bind(&done);
-  }
-
-  // ----------- S t a t e -------------
-  //  -- a1    : target
-  //  -- a0    : args (a FixedArray built from argumentsList)
-  //  -- a2    : len (number of elements to push from args)
-  //  -- a3    : new.target (checked to be constructor or undefined)
-  //  -- sp[0] : thisArgument
-  // -----------------------------------
-
-  // Push arguments onto the stack (thisArgument is already on the stack).
-  {
-    __ mov(t0, zero_reg);
-    Label done, loop;
-    __ bind(&loop);
-    __ Branch(&done, eq, t0, Operand(a2));
-    __ Lsa(at, a0, t0, kPointerSizeLog2);
-    __ lw(at, FieldMemOperand(at, FixedArray::kHeaderSize));
-    __ Push(at);
-    __ Addu(t0, t0, Operand(1));
-    __ Branch(&loop);
-    __ bind(&done);
-    __ Move(a0, t0);
-  }
-
-  // Dispatch to Call or Construct depending on whether new.target is undefined.
-  {
-    Label construct;
-    __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
-    __ Branch(&construct, ne, a3, Operand(at));
-    __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
-    __ bind(&construct);
-    __ 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());
-  __ li(at, Operand(is_tail_call_elimination_enabled));
-  __ lb(scratch1, MemOperand(at));
-  __ Branch(&done, eq, scratch1, Operand(zero_reg));
-
-  // Drop possible interpreter handler/stub frame.
-  {
-    Label no_interpreter_frame;
-    __ lw(scratch3,
-          MemOperand(fp, CommonFrameConstants::kContextOrFrameTypeOffset));
-    __ Branch(&no_interpreter_frame, ne, scratch3,
-              Operand(Smi::FromInt(StackFrame::STUB)));
-    __ lw(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;
-  __ lw(scratch2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
-  __ lw(scratch3,
-        MemOperand(scratch2, CommonFrameConstants::kContextOrFrameTypeOffset));
-  __ Branch(&no_arguments_adaptor, ne, scratch3,
-            Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
-
-  // Drop current frame and load arguments count from arguments adaptor frame.
-  __ mov(fp, scratch2);
-  __ lw(caller_args_count_reg,
-        MemOperand(fp, ArgumentsAdaptorFrameConstants::kLengthOffset));
-  __ SmiUntag(caller_args_count_reg);
-  __ Branch(&formal_parameter_count_loaded);
-
-  __ bind(&no_arguments_adaptor);
-  // Load caller's formal parameter count
-  __ lw(scratch1,
-        MemOperand(fp, ArgumentsAdaptorFrameConstants::kFunctionOffset));
-  __ lw(scratch1,
-        FieldMemOperand(scratch1, JSFunction::kSharedFunctionInfoOffset));
-  __ lw(caller_args_count_reg,
-        FieldMemOperand(scratch1,
-                        SharedFunctionInfo::kFormalParameterCountOffset));
-  __ SmiUntag(caller_args_count_reg);
-
-  __ 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) {
-  // ----------- S t a t e -------------
-  //  -- a0 : the number of arguments (not including the receiver)
-  //  -- a1 : the function to call (checked to be a JSFunction)
-  // -----------------------------------
-  __ AssertFunction(a1);
-
-  // See ES6 section 9.2.1 [[Call]] ( thisArgument, argumentsList)
-  // Check that the function is not a "classConstructor".
-  Label class_constructor;
-  __ lw(a2, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
-  __ lbu(a3, FieldMemOperand(a2, SharedFunctionInfo::kFunctionKindByteOffset));
-  __ And(at, a3, Operand(SharedFunctionInfo::kClassConstructorBitsWithinByte));
-  __ Branch(&class_constructor, ne, at, Operand(zero_reg));
-
-  // 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.
-  STATIC_ASSERT(SharedFunctionInfo::kNativeByteOffset ==
-                SharedFunctionInfo::kStrictModeByteOffset);
-  __ lw(cp, FieldMemOperand(a1, JSFunction::kContextOffset));
-  // We need to convert the receiver for non-native sloppy mode functions.
-  Label done_convert;
-  __ lbu(a3, FieldMemOperand(a2, SharedFunctionInfo::kNativeByteOffset));
-  __ And(at, a3, Operand((1 << SharedFunctionInfo::kNativeBitWithinByte) |
-                         (1 << SharedFunctionInfo::kStrictModeBitWithinByte)));
-  __ Branch(&done_convert, ne, at, Operand(zero_reg));
-  {
-    // ----------- S t a t e -------------
-    //  -- a0 : the number of arguments (not including the receiver)
-    //  -- a1 : the function to call (checked to be a JSFunction)
-    //  -- a2 : the shared function info.
-    //  -- cp : the function context.
-    // -----------------------------------
-
-    if (mode == ConvertReceiverMode::kNullOrUndefined) {
-      // Patch receiver to global proxy.
-      __ LoadGlobalProxy(a3);
-    } else {
-      Label convert_to_object, convert_receiver;
-      __ Lsa(at, sp, a0, kPointerSizeLog2);
-      __ lw(a3, MemOperand(at));
-      __ JumpIfSmi(a3, &convert_to_object);
-      STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE);
-      __ GetObjectType(a3, t0, t0);
-      __ Branch(&done_convert, hs, t0, Operand(FIRST_JS_RECEIVER_TYPE));
-      if (mode != ConvertReceiverMode::kNotNullOrUndefined) {
-        Label convert_global_proxy;
-        __ JumpIfRoot(a3, Heap::kUndefinedValueRootIndex,
-                      &convert_global_proxy);
-        __ JumpIfNotRoot(a3, Heap::kNullValueRootIndex, &convert_to_object);
-        __ bind(&convert_global_proxy);
-        {
-          // Patch receiver to global proxy.
-          __ LoadGlobalProxy(a3);
-        }
-        __ Branch(&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);
-        __ sll(a0, a0, kSmiTagSize);  // Smi tagged.
-        __ Push(a0, a1);
-        __ mov(a0, a3);
-        ToObjectStub stub(masm->isolate());
-        __ CallStub(&stub);
-        __ mov(a3, v0);
-        __ Pop(a0, a1);
-        __ sra(a0, a0, kSmiTagSize);  // Un-tag.
-      }
-      __ lw(a2, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
-      __ bind(&convert_receiver);
-    }
-    __ Lsa(at, sp, a0, kPointerSizeLog2);
-    __ sw(a3, MemOperand(at));
-  }
-  __ bind(&done_convert);
-
-  // ----------- S t a t e -------------
-  //  -- a0 : the number of arguments (not including the receiver)
-  //  -- a1 : the function to call (checked to be a JSFunction)
-  //  -- a2 : the shared function info.
-  //  -- cp : the function context.
-  // -----------------------------------
-
-  if (tail_call_mode == TailCallMode::kAllow) {
-    PrepareForTailCall(masm, a0, t0, t1, t2);
-  }
-
-  __ lw(a2,
-        FieldMemOperand(a2, SharedFunctionInfo::kFormalParameterCountOffset));
-  __ sra(a2, a2, kSmiTagSize);  // Un-tag.
-  ParameterCount actual(a0);
-  ParameterCount expected(a2);
-  __ InvokeFunctionCode(a1, 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(a1);
-    __ CallRuntime(Runtime::kThrowConstructorNonCallableError);
-  }
-}
-
-
-// static
-void Builtins::Generate_CallBoundFunctionImpl(MacroAssembler* masm,
-                                              TailCallMode tail_call_mode) {
-  // ----------- S t a t e -------------
-  //  -- a0 : the number of arguments (not including the receiver)
-  //  -- a1 : the function to call (checked to be a JSBoundFunction)
-  // -----------------------------------
-  __ AssertBoundFunction(a1);
-
-  if (tail_call_mode == TailCallMode::kAllow) {
-    PrepareForTailCall(masm, a0, t0, t1, t2);
-  }
-
-  // Patch the receiver to [[BoundThis]].
-  {
-    __ lw(at, FieldMemOperand(a1, JSBoundFunction::kBoundThisOffset));
-    __ Lsa(t0, sp, a0, kPointerSizeLog2);
-    __ sw(at, MemOperand(t0));
-  }
-
-  // Load [[BoundArguments]] into a2 and length of that into t0.
-  __ lw(a2, FieldMemOperand(a1, JSBoundFunction::kBoundArgumentsOffset));
-  __ lw(t0, FieldMemOperand(a2, FixedArray::kLengthOffset));
-  __ SmiUntag(t0);
-
-  // ----------- S t a t e -------------
-  //  -- a0 : the number of arguments (not including the receiver)
-  //  -- a1 : the function to call (checked to be a JSBoundFunction)
-  //  -- a2 : the [[BoundArguments]] (implemented as FixedArray)
-  //  -- t0 : the number of [[BoundArguments]]
-  // -----------------------------------
-
-  // Reserve stack space for the [[BoundArguments]].
-  {
-    Label done;
-    __ sll(t1, t0, kPointerSizeLog2);
-    __ Subu(sp, sp, Operand(t1));
-    // 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".
-    __ LoadRoot(at, Heap::kRealStackLimitRootIndex);
-    __ Branch(&done, gt, sp, Operand(at));  // Signed comparison.
-    // Restore the stack pointer.
-    __ Addu(sp, sp, Operand(t1));
-    {
-      FrameScope scope(masm, StackFrame::MANUAL);
-      __ EnterFrame(StackFrame::INTERNAL);
-      __ CallRuntime(Runtime::kThrowStackOverflow);
-    }
-    __ bind(&done);
-  }
-
-  // Relocate arguments down the stack.
-  {
-    Label loop, done_loop;
-    __ mov(t1, zero_reg);
-    __ bind(&loop);
-    __ Branch(&done_loop, gt, t1, Operand(a0));
-    __ Lsa(t2, sp, t0, kPointerSizeLog2);
-    __ lw(at, MemOperand(t2));
-    __ Lsa(t2, sp, t1, kPointerSizeLog2);
-    __ sw(at, MemOperand(t2));
-    __ Addu(t0, t0, Operand(1));
-    __ Addu(t1, t1, Operand(1));
-    __ Branch(&loop);
-    __ bind(&done_loop);
-  }
-
-  // Copy [[BoundArguments]] to the stack (below the arguments).
-  {
-    Label loop, done_loop;
-    __ lw(t0, FieldMemOperand(a2, FixedArray::kLengthOffset));
-    __ SmiUntag(t0);
-    __ Addu(a2, a2, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-    __ bind(&loop);
-    __ Subu(t0, t0, Operand(1));
-    __ Branch(&done_loop, lt, t0, Operand(zero_reg));
-    __ Lsa(t1, a2, t0, kPointerSizeLog2);
-    __ lw(at, MemOperand(t1));
-    __ Lsa(t1, sp, a0, kPointerSizeLog2);
-    __ sw(at, MemOperand(t1));
-    __ Addu(a0, a0, Operand(1));
-    __ Branch(&loop);
-    __ bind(&done_loop);
-  }
-
-  // Call the [[BoundTargetFunction]] via the Call builtin.
-  __ lw(a1, FieldMemOperand(a1, JSBoundFunction::kBoundTargetFunctionOffset));
-  __ li(at, Operand(ExternalReference(Builtins::kCall_ReceiverIsAny,
-                                      masm->isolate())));
-  __ lw(at, MemOperand(at));
-  __ Addu(at, at, Operand(Code::kHeaderSize - kHeapObjectTag));
-  __ Jump(at);
-}
-
-
-// static
-void Builtins::Generate_Call(MacroAssembler* masm, ConvertReceiverMode mode,
-                             TailCallMode tail_call_mode) {
-  // ----------- S t a t e -------------
-  //  -- a0 : the number of arguments (not including the receiver)
-  //  -- a1 : the target to call (can be any Object).
-  // -----------------------------------
-
-  Label non_callable, non_function, non_smi;
-  __ JumpIfSmi(a1, &non_callable);
-  __ bind(&non_smi);
-  __ GetObjectType(a1, t1, t2);
-  __ Jump(masm->isolate()->builtins()->CallFunction(mode, tail_call_mode),
-          RelocInfo::CODE_TARGET, eq, t2, Operand(JS_FUNCTION_TYPE));
-  __ Jump(masm->isolate()->builtins()->CallBoundFunction(tail_call_mode),
-          RelocInfo::CODE_TARGET, eq, t2, Operand(JS_BOUND_FUNCTION_TYPE));
-
-  // Check if target has a [[Call]] internal method.
-  __ lbu(t1, FieldMemOperand(t1, Map::kBitFieldOffset));
-  __ And(t1, t1, Operand(1 << Map::kIsCallable));
-  __ Branch(&non_callable, eq, t1, Operand(zero_reg));
-
-  __ Branch(&non_function, ne, t2, Operand(JS_PROXY_TYPE));
-
-  // 0. Prepare for tail call if necessary.
-  if (tail_call_mode == TailCallMode::kAllow) {
-    PrepareForTailCall(masm, a0, t0, t1, t2);
-  }
-
-  // 1. Runtime fallback for Proxy [[Call]].
-  __ Push(a1);
-  // Increase the arguments size to include the pushed function and the
-  // existing receiver on the stack.
-  __ Addu(a0, a0, 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.
-  __ Lsa(at, sp, a0, kPointerSizeLog2);
-  __ sw(a1, MemOperand(at));
-  // Let the "call_as_function_delegate" take care of the rest.
-  __ LoadNativeContextSlot(Context::CALL_AS_FUNCTION_DELEGATE_INDEX, a1);
-  __ 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(a1);
-    __ CallRuntime(Runtime::kThrowCalledNonCallable);
-  }
-}
-
-
-// static
-void Builtins::Generate_ConstructFunction(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0 : the number of arguments (not including the receiver)
-  //  -- a1 : the constructor to call (checked to be a JSFunction)
-  //  -- a3 : the new target (checked to be a constructor)
-  // -----------------------------------
-  __ AssertFunction(a1);
-
-  // Calling convention for function specific ConstructStubs require
-  // a2 to contain either an AllocationSite or undefined.
-  __ LoadRoot(a2, Heap::kUndefinedValueRootIndex);
-
-  // Tail call to the function-specific construct stub (still in the caller
-  // context at this point).
-  __ lw(t0, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
-  __ lw(t0, FieldMemOperand(t0, SharedFunctionInfo::kConstructStubOffset));
-  __ Addu(at, t0, Operand(Code::kHeaderSize - kHeapObjectTag));
-  __ Jump(at);
-}
-
-
-// static
-void Builtins::Generate_ConstructBoundFunction(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0 : the number of arguments (not including the receiver)
-  //  -- a1 : the function to call (checked to be a JSBoundFunction)
-  //  -- a3 : the new target (checked to be a constructor)
-  // -----------------------------------
-  __ AssertBoundFunction(a1);
-
-  // Load [[BoundArguments]] into a2 and length of that into t0.
-  __ lw(a2, FieldMemOperand(a1, JSBoundFunction::kBoundArgumentsOffset));
-  __ lw(t0, FieldMemOperand(a2, FixedArray::kLengthOffset));
-  __ SmiUntag(t0);
-
-  // ----------- S t a t e -------------
-  //  -- a0 : the number of arguments (not including the receiver)
-  //  -- a1 : the function to call (checked to be a JSBoundFunction)
-  //  -- a2 : the [[BoundArguments]] (implemented as FixedArray)
-  //  -- a3 : the new target (checked to be a constructor)
-  //  -- t0 : the number of [[BoundArguments]]
-  // -----------------------------------
-
-  // Reserve stack space for the [[BoundArguments]].
-  {
-    Label done;
-    __ sll(t1, t0, kPointerSizeLog2);
-    __ Subu(sp, sp, Operand(t1));
-    // 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".
-    __ LoadRoot(at, Heap::kRealStackLimitRootIndex);
-    __ Branch(&done, gt, sp, Operand(at));  // Signed comparison.
-    // Restore the stack pointer.
-    __ Addu(sp, sp, Operand(t1));
-    {
-      FrameScope scope(masm, StackFrame::MANUAL);
-      __ EnterFrame(StackFrame::INTERNAL);
-      __ CallRuntime(Runtime::kThrowStackOverflow);
-    }
-    __ bind(&done);
-  }
-
-  // Relocate arguments down the stack.
-  {
-    Label loop, done_loop;
-    __ mov(t1, zero_reg);
-    __ bind(&loop);
-    __ Branch(&done_loop, ge, t1, Operand(a0));
-    __ Lsa(t2, sp, t0, kPointerSizeLog2);
-    __ lw(at, MemOperand(t2));
-    __ Lsa(t2, sp, t1, kPointerSizeLog2);
-    __ sw(at, MemOperand(t2));
-    __ Addu(t0, t0, Operand(1));
-    __ Addu(t1, t1, Operand(1));
-    __ Branch(&loop);
-    __ bind(&done_loop);
-  }
-
-  // Copy [[BoundArguments]] to the stack (below the arguments).
-  {
-    Label loop, done_loop;
-    __ lw(t0, FieldMemOperand(a2, FixedArray::kLengthOffset));
-    __ SmiUntag(t0);
-    __ Addu(a2, a2, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-    __ bind(&loop);
-    __ Subu(t0, t0, Operand(1));
-    __ Branch(&done_loop, lt, t0, Operand(zero_reg));
-    __ Lsa(t1, a2, t0, kPointerSizeLog2);
-    __ lw(at, MemOperand(t1));
-    __ Lsa(t1, sp, a0, kPointerSizeLog2);
-    __ sw(at, MemOperand(t1));
-    __ Addu(a0, a0, Operand(1));
-    __ Branch(&loop);
-    __ bind(&done_loop);
-  }
-
-  // Patch new.target to [[BoundTargetFunction]] if new.target equals target.
-  {
-    Label skip_load;
-    __ Branch(&skip_load, ne, a1, Operand(a3));
-    __ lw(a3, FieldMemOperand(a1, JSBoundFunction::kBoundTargetFunctionOffset));
-    __ bind(&skip_load);
-  }
-
-  // Construct the [[BoundTargetFunction]] via the Construct builtin.
-  __ lw(a1, FieldMemOperand(a1, JSBoundFunction::kBoundTargetFunctionOffset));
-  __ li(at, Operand(ExternalReference(Builtins::kConstruct, masm->isolate())));
-  __ lw(at, MemOperand(at));
-  __ Addu(at, at, Operand(Code::kHeaderSize - kHeapObjectTag));
-  __ Jump(at);
-}
-
-
-// static
-void Builtins::Generate_ConstructProxy(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0 : the number of arguments (not including the receiver)
-  //  -- a1 : the constructor to call (checked to be a JSProxy)
-  //  -- a3 : 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(a1, a3);
-  // Include the pushed new_target, constructor and the receiver.
-  __ Addu(a0, a0, Operand(3));
-  // Tail-call to the runtime.
-  __ JumpToExternalReference(
-      ExternalReference(Runtime::kJSProxyConstruct, masm->isolate()));
-}
-
-
-// static
-void Builtins::Generate_Construct(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0 : the number of arguments (not including the receiver)
-  //  -- a1 : the constructor to call (can be any Object)
-  //  -- a3 : 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(a1, &non_constructor);
-
-  // Dispatch based on instance type.
-  __ lw(t1, FieldMemOperand(a1, HeapObject::kMapOffset));
-  __ lbu(t2, FieldMemOperand(t1, Map::kInstanceTypeOffset));
-  __ Jump(masm->isolate()->builtins()->ConstructFunction(),
-          RelocInfo::CODE_TARGET, eq, t2, Operand(JS_FUNCTION_TYPE));
-
-  // Check if target has a [[Construct]] internal method.
-  __ lbu(t3, FieldMemOperand(t1, Map::kBitFieldOffset));
-  __ And(t3, t3, Operand(1 << Map::kIsConstructor));
-  __ Branch(&non_constructor, eq, t3, Operand(zero_reg));
-
-  // Only dispatch to bound functions after checking whether they are
-  // constructors.
-  __ Jump(masm->isolate()->builtins()->ConstructBoundFunction(),
-          RelocInfo::CODE_TARGET, eq, t2, Operand(JS_BOUND_FUNCTION_TYPE));
-
-  // Only dispatch to proxies after checking whether they are constructors.
-  __ Jump(masm->isolate()->builtins()->ConstructProxy(), RelocInfo::CODE_TARGET,
-          eq, t2, Operand(JS_PROXY_TYPE));
-
-  // Called Construct on an exotic Object with a [[Construct]] internal method.
-  {
-    // Overwrite the original receiver with the (original) target.
-    __ Lsa(at, sp, a0, kPointerSizeLog2);
-    __ sw(a1, MemOperand(at));
-    // Let the "call_as_constructor_delegate" take care of the rest.
-    __ LoadNativeContextSlot(Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, a1);
-    __ 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) {
-  // ----------- S t a t e -------------
-  //  -- a0 : requested object size (untagged)
-  //  -- ra : return address
-  // -----------------------------------
-  __ SmiTag(a0);
-  __ Push(a0);
-  __ Move(cp, Smi::FromInt(0));
-  __ TailCallRuntime(Runtime::kAllocateInNewSpace);
-}
-
-// static
-void Builtins::Generate_AllocateInOldSpace(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a0 : requested object size (untagged)
-  //  -- ra : return address
-  // -----------------------------------
-  __ SmiTag(a0);
-  __ Move(a1, Smi::FromInt(AllocateTargetSpace::encode(OLD_SPACE)));
-  __ Push(a0, a1);
-  __ Move(cp, Smi::FromInt(0));
-  __ TailCallRuntime(Runtime::kAllocateInTargetSpace);
-}
-
-// static
-void Builtins::Generate_StringToNumber(MacroAssembler* masm) {
-  // The StringToNumber stub takes on argument in a0.
-  __ AssertString(a0);
-
-  // Check if string has a cached array index.
-  Label runtime;
-  __ lw(a2, FieldMemOperand(a0, String::kHashFieldOffset));
-  __ And(at, a2, Operand(String::kContainsCachedArrayIndexMask));
-  __ Branch(&runtime, ne, at, Operand(zero_reg));
-  __ IndexFromHash(a2, v0);
-  __ Ret();
-
-  __ bind(&runtime);
-  {
-    FrameScope frame(masm, StackFrame::INTERNAL);
-    // Push argument.
-    __ Push(a0);
-    // 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 a0.
-  Label not_smi;
-  __ JumpIfNotSmi(a0, &not_smi);
-  __ Ret(USE_DELAY_SLOT);
-  __ mov(v0, a0);
-  __ bind(&not_smi);
-
-  Label not_heap_number;
-  __ GetObjectType(a0, a1, a1);
-  // a0: receiver
-  // a1: receiver instance type
-  __ Branch(&not_heap_number, ne, a1, Operand(HEAP_NUMBER_TYPE));
-  __ Ret(USE_DELAY_SLOT);
-  __ mov(v0, a0);
-  __ bind(&not_heap_number);
-
-  __ Jump(masm->isolate()->builtins()->NonNumberToNumber(),
-          RelocInfo::CODE_TARGET);
-}
-
-// static
-void Builtins::Generate_NonNumberToNumber(MacroAssembler* masm) {
-  // The NonNumberToNumber stub takes on argument in a0.
-  __ AssertNotNumber(a0);
-
-  Label not_string;
-  __ GetObjectType(a0, a1, a1);
-  // a0: receiver
-  // a1: receiver instance type
-  __ Branch(&not_string, hs, a1, Operand(FIRST_NONSTRING_TYPE));
-  __ Jump(masm->isolate()->builtins()->StringToNumber(),
-          RelocInfo::CODE_TARGET);
-  __ bind(&not_string);
-
-  Label not_oddball;
-  __ Branch(&not_oddball, ne, a1, Operand(ODDBALL_TYPE));
-  __ Ret(USE_DELAY_SLOT);
-  __ lw(v0, FieldMemOperand(a0, Oddball::kToNumberOffset));  // In delay slot.
-  __ bind(&not_oddball);
-  {
-    FrameScope frame(masm, StackFrame::INTERNAL);
-    // Push argument.
-    __ Push(a0);
-    // 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) {
-  // State setup as expected by MacroAssembler::InvokePrologue.
-  // ----------- S t a t e -------------
-  //  -- a0: actual arguments count
-  //  -- a1: function (passed through to callee)
-  //  -- a2: expected arguments count
-  //  -- a3: new target (passed through to callee)
-  // -----------------------------------
-
-  Label invoke, dont_adapt_arguments, stack_overflow;
-
-  Label enough, too_few;
-  __ Branch(&dont_adapt_arguments, eq,
-      a2, Operand(SharedFunctionInfo::kDontAdaptArgumentsSentinel));
-  // We use Uless as the number of argument should always be greater than 0.
-  __ Branch(&too_few, Uless, a0, Operand(a2));
-
-  {  // Enough parameters: actual >= expected.
-    // a0: actual number of arguments as a smi
-    // a1: function
-    // a2: expected number of arguments
-    // a3: new target (passed through to callee)
-    __ bind(&enough);
-    EnterArgumentsAdaptorFrame(masm);
-    ArgumentAdaptorStackCheck(masm, &stack_overflow);
-
-    // Calculate copy start address into a0 and copy end address into t1.
-    __ Lsa(a0, fp, a0, kPointerSizeLog2 - kSmiTagSize);
-    // Adjust for return address and receiver.
-    __ Addu(a0, a0, Operand(2 * kPointerSize));
-    // Compute copy end address.
-    __ sll(t1, a2, kPointerSizeLog2);
-    __ subu(t1, a0, t1);
-
-    // Copy the arguments (including the receiver) to the new stack frame.
-    // a0: copy start address
-    // a1: function
-    // a2: expected number of arguments
-    // a3: new target (passed through to callee)
-    // t1: copy end address
-
-    Label copy;
-    __ bind(&copy);
-    __ lw(t0, MemOperand(a0));
-    __ push(t0);
-    __ Branch(USE_DELAY_SLOT, &copy, ne, a0, Operand(t1));
-    __ addiu(a0, a0, -kPointerSize);  // In delay slot.
-
-    __ jmp(&invoke);
-  }
-
-  {  // Too few parameters: Actual < expected.
-    __ bind(&too_few);
-    EnterArgumentsAdaptorFrame(masm);
-    ArgumentAdaptorStackCheck(masm, &stack_overflow);
-
-    // Calculate copy start address into a0 and copy end address into t3.
-    // a0: actual number of arguments as a smi
-    // a1: function
-    // a2: expected number of arguments
-    // a3: new target (passed through to callee)
-    __ Lsa(a0, fp, a0, kPointerSizeLog2 - kSmiTagSize);
-    // Adjust for return address and receiver.
-    __ Addu(a0, a0, Operand(2 * kPointerSize));
-    // Compute copy end address. Also adjust for return address.
-    __ Addu(t3, fp, kPointerSize);
-
-    // Copy the arguments (including the receiver) to the new stack frame.
-    // a0: copy start address
-    // a1: function
-    // a2: expected number of arguments
-    // a3: new target (passed through to callee)
-    // t3: copy end address
-    Label copy;
-    __ bind(&copy);
-    __ lw(t0, MemOperand(a0));  // Adjusted above for return addr and receiver.
-    __ Subu(sp, sp, kPointerSize);
-    __ Subu(a0, a0, kPointerSize);
-    __ Branch(USE_DELAY_SLOT, &copy, ne, a0, Operand(t3));
-    __ sw(t0, MemOperand(sp));  // In the delay slot.
-
-    // Fill the remaining expected arguments with undefined.
-    // a1: function
-    // a2: expected number of arguments
-    // a3: new target (passed through to callee)
-    __ LoadRoot(t0, Heap::kUndefinedValueRootIndex);
-    __ sll(t2, a2, kPointerSizeLog2);
-    __ Subu(t1, fp, Operand(t2));
-    // Adjust for frame.
-    __ Subu(t1, t1, Operand(StandardFrameConstants::kFixedFrameSizeFromFp +
-                            2 * kPointerSize));
-
-    Label fill;
-    __ bind(&fill);
-    __ Subu(sp, sp, kPointerSize);
-    __ Branch(USE_DELAY_SLOT, &fill, ne, sp, Operand(t1));
-    __ sw(t0, MemOperand(sp));
-  }
-
-  // Call the entry point.
-  __ bind(&invoke);
-  __ mov(a0, a2);
-  // a0 : expected number of arguments
-  // a1 : function (passed through to callee)
-  // a3 : new target (passed through to callee)
-  __ lw(t0, FieldMemOperand(a1, JSFunction::kCodeEntryOffset));
-  __ Call(t0);
-
-  // Store offset of return address for deoptimizer.
-  masm->isolate()->heap()->SetArgumentsAdaptorDeoptPCOffset(masm->pc_offset());
-
-  // Exit frame and return.
-  LeaveArgumentsAdaptorFrame(masm);
-  __ Ret();
-
-
-  // -------------------------------------------
-  // Don't adapt arguments.
-  // -------------------------------------------
-  __ bind(&dont_adapt_arguments);
-  __ lw(t0, FieldMemOperand(a1, JSFunction::kCodeEntryOffset));
-  __ Jump(t0);
-
-  __ bind(&stack_overflow);
-  {
-    FrameScope frame(masm, StackFrame::MANUAL);
-    __ CallRuntime(Runtime::kThrowStackOverflow);
-    __ break_(0xCC);
-  }
-}
-
-
-#undef __
-
-}  // namespace internal
-}  // namespace v8
-
-#endif  // V8_TARGET_ARCH_MIPS