// 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_IA32

#include "src/api/api-arguments.h"
#include "src/base/bits-iterator.h"
#include "src/base/iterator.h"
#include "src/codegen/code-factory.h"
// For interpreter_entry_return_pc_offset. TODO(jkummerow): Drop.
#include "src/codegen/macro-assembler-inl.h"
#include "src/codegen/register-configuration.h"
#include "src/debug/debug.h"
#include "src/deoptimizer/deoptimizer.h"
#include "src/execution/frame-constants.h"
#include "src/execution/frames.h"
#include "src/heap/heap-inl.h"
#include "src/logging/counters.h"
#include "src/objects/cell.h"
#include "src/objects/foreign.h"
#include "src/objects/heap-number.h"
#include "src/objects/js-generator.h"
#include "src/objects/objects-inl.h"
#include "src/objects/smi.h"
#include "src/wasm/wasm-linkage.h"
#include "src/wasm/wasm-objects.h"

namespace v8 {
namespace internal {

#define __ ACCESS_MASM(masm)

void Builtins::Generate_Adaptor(MacroAssembler* masm, Address address) {
  __ Move(kJavaScriptCallExtraArg1Register,
          Immediate(ExternalReference::Create(address)));
  __ Jump(BUILTIN_CODE(masm->isolate(), AdaptorWithBuiltinExitFrame),
          RelocInfo::CODE_TARGET);
}

static void GenerateTailCallToReturnedCode(MacroAssembler* masm,
                                           Runtime::FunctionId function_id) {
  // ----------- S t a t e -------------
  //  -- eax : actual argument count
  //  -- edx : new target (preserved for callee)
  //  -- edi : target function (preserved for callee)
  // -----------------------------------
  {
    FrameScope scope(masm, StackFrame::INTERNAL);
    // Push a copy of the target function, the new target and the actual
    // argument count.
    __ push(kJavaScriptCallTargetRegister);
    __ push(kJavaScriptCallNewTargetRegister);
    __ SmiTag(kJavaScriptCallArgCountRegister);
    __ push(kJavaScriptCallArgCountRegister);
    // Function is also the parameter to the runtime call.
    __ push(kJavaScriptCallTargetRegister);

    __ CallRuntime(function_id, 1);
    __ mov(ecx, eax);

    // Restore target function, new target and actual argument count.
    __ pop(kJavaScriptCallArgCountRegister);
    __ SmiUntag(kJavaScriptCallArgCountRegister);
    __ pop(kJavaScriptCallNewTargetRegister);
    __ pop(kJavaScriptCallTargetRegister);
  }

  static_assert(kJavaScriptCallCodeStartRegister == ecx, "ABI mismatch");
  __ JumpCodeObject(ecx);
}

namespace {

void Generate_JSBuiltinsConstructStubHelper(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- eax: number of arguments
  //  -- edi: constructor function
  //  -- edx: new target
  //  -- esi: context
  // -----------------------------------

  Label stack_overflow;

  __ StackOverflowCheck(eax, ecx, &stack_overflow);

  // Enter a construct frame.
  {
    FrameScope scope(masm, StackFrame::CONSTRUCT);

    // Preserve the incoming parameters on the stack.
    __ SmiTag(eax);
    __ push(esi);
    __ push(eax);
    __ SmiUntag(eax);

    // TODO(victorgomes): When the arguments adaptor is completely removed, we
    // should get the formal parameter count and copy the arguments in its
    // correct position (including any undefined), instead of delaying this to
    // InvokeFunction.

    // Set up pointer to first argument (skip receiver).
    __ lea(esi, Operand(ebp, StandardFrameConstants::kCallerSPOffset +
                                 kSystemPointerSize));
    // Copy arguments to the expression stack.
    __ PushArray(esi, eax, ecx);
    // The receiver for the builtin/api call.
    __ PushRoot(RootIndex::kTheHoleValue);

    // Call the function.
    // eax: number of arguments (untagged)
    // edi: constructor function
    // edx: new target
    // Reload context from the frame.
    __ mov(esi, Operand(ebp, ConstructFrameConstants::kContextOffset));
    __ InvokeFunction(edi, edx, eax, CALL_FUNCTION);

    // Restore context from the frame.
    __ mov(esi, Operand(ebp, ConstructFrameConstants::kContextOffset));
    // Restore smi-tagged arguments count from the frame.
    __ mov(edx, Operand(ebp, ConstructFrameConstants::kLengthOffset));
    // Leave construct frame.
  }

  // Remove caller arguments from the stack and return.
  STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0);
  __ PopReturnAddressTo(ecx);
  __ lea(esp, Operand(esp, edx, times_half_system_pointer_size,
                      1 * kSystemPointerSize));  // 1 ~ receiver
  __ PushReturnAddressFrom(ecx);
  __ ret(0);

  __ bind(&stack_overflow);
  {
    FrameScope scope(masm, StackFrame::INTERNAL);
    __ CallRuntime(Runtime::kThrowStackOverflow);
    __ int3();  // This should be unreachable.
  }
}

}  // namespace

// The construct stub for ES5 constructor functions and ES6 class constructors.
void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- eax: number of arguments (untagged)
  //  -- edi: constructor function
  //  -- edx: new target
  //  -- esi: context
  //  -- sp[...]: constructor arguments
  // -----------------------------------

  FrameScope scope(masm, StackFrame::MANUAL);
  // Enter a construct frame.
  __ EnterFrame(StackFrame::CONSTRUCT);

  Label post_instantiation_deopt_entry, not_create_implicit_receiver;

  // Preserve the incoming parameters on the stack.
  __ mov(ecx, eax);
  __ SmiTag(ecx);
  __ Push(esi);
  __ Push(ecx);
  __ Push(edi);
  __ PushRoot(RootIndex::kTheHoleValue);
  __ Push(edx);

  // ----------- S t a t e -------------
  //  --         sp[0*kSystemPointerSize]: new target
  //  --         sp[1*kSystemPointerSize]: padding
  //  -- edi and sp[2*kSystemPointerSize]: constructor function
  //  --         sp[3*kSystemPointerSize]: argument count
  //  --         sp[4*kSystemPointerSize]: context
  // -----------------------------------

  __ mov(eax, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
  __ mov(eax, FieldOperand(eax, SharedFunctionInfo::kFlagsOffset));
  __ DecodeField<SharedFunctionInfo::FunctionKindBits>(eax);
  __ JumpIfIsInRange(eax, kDefaultDerivedConstructor, kDerivedConstructor, ecx,
                     &not_create_implicit_receiver, Label::kNear);

  // If not derived class constructor: Allocate the new receiver object.
  __ IncrementCounter(masm->isolate()->counters()->constructed_objects(), 1,
                      eax);
  __ Call(BUILTIN_CODE(masm->isolate(), FastNewObject), RelocInfo::CODE_TARGET);
  __ jmp(&post_instantiation_deopt_entry, Label::kNear);

  // Else: use TheHoleValue as receiver for constructor call
  __ bind(&not_create_implicit_receiver);
  __ LoadRoot(eax, RootIndex::kTheHoleValue);

  // ----------- S t a t e -------------
  //  --                         eax: implicit receiver
  //  -- Slot 4 / sp[0*kSystemPointerSize]: new target
  //  -- Slot 3 / sp[1*kSystemPointerSize]: padding
  //  -- Slot 2 / sp[2*kSystemPointerSize]: constructor function
  //  -- Slot 1 / sp[3*kSystemPointerSize]: number of arguments (tagged)
  //  -- Slot 0 / sp[4*kSystemPointerSize]: context
  // -----------------------------------
  // Deoptimizer enters here.
  masm->isolate()->heap()->SetConstructStubCreateDeoptPCOffset(
      masm->pc_offset());
  __ bind(&post_instantiation_deopt_entry);

  // Restore new target.
  __ Pop(edx);

  // Push the allocated receiver to the stack.
  __ Push(eax);

  // 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. The second copy is pushed after the arguments, we saved in r8
  // since rax needs to store the number of arguments before
  // InvokingFunction.
  __ movd(xmm0, eax);

  // Set up pointer to first argument (skip receiver).
  __ lea(edi, Operand(ebp, StandardFrameConstants::kCallerSPOffset +
                               kSystemPointerSize));

  // Restore argument count.
  __ mov(eax, Operand(ebp, ConstructFrameConstants::kLengthOffset));
  __ SmiUntag(eax);

  // Check if we have enough stack space to push all arguments.
  // Argument count in eax. Clobbers ecx.
  Label stack_overflow;
  __ StackOverflowCheck(eax, ecx, &stack_overflow);

  // TODO(victorgomes): When the arguments adaptor is completely removed, we
  // should get the formal parameter count and copy the arguments in its
  // correct position (including any undefined), instead of delaying this to
  // InvokeFunction.

  // Copy arguments to the expression stack.
  __ PushArray(edi, eax, ecx);

  // Push implicit receiver.
  __ movd(ecx, xmm0);
  __ Push(ecx);

  // Restore and and call the constructor function.
  __ mov(edi, Operand(ebp, ConstructFrameConstants::kConstructorOffset));
  __ InvokeFunction(edi, edx, eax, CALL_FUNCTION);

  // ----------- S t a t e -------------
  //  --                eax: constructor result
  //  -- sp[0*kSystemPointerSize]: implicit receiver
  //  -- sp[1*kSystemPointerSize]: padding
  //  -- sp[2*kSystemPointerSize]: constructor function
  //  -- sp[3*kSystemPointerSize]: number of arguments
  //  -- sp[4*kSystemPointerSize]: context
  // -----------------------------------

  // Store offset of return address for deoptimizer.
  masm->isolate()->heap()->SetConstructStubInvokeDeoptPCOffset(
      masm->pc_offset());

  // 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 check_result, use_receiver, do_throw, leave_and_return;
  // If the result is undefined, we jump out to using the implicit receiver.
  __ JumpIfNotRoot(eax, RootIndex::kUndefinedValue, &check_result,
                   Label::kNear);

  // Throw away the result of the constructor invocation and use the
  // on-stack receiver as the result.
  __ bind(&use_receiver);
  __ mov(eax, Operand(esp, 0 * kSystemPointerSize));
  __ JumpIfRoot(eax, RootIndex::kTheHoleValue, &do_throw);

  __ bind(&leave_and_return);
  // Restore smi-tagged arguments count from the frame.
  __ mov(edx, Operand(ebp, ConstructFrameConstants::kLengthOffset));
  __ LeaveFrame(StackFrame::CONSTRUCT);

  // Remove caller arguments from the stack and return.
  STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0);
  __ pop(ecx);
  __ lea(esp, Operand(esp, edx, times_half_system_pointer_size,
                      1 * kSystemPointerSize));  // 1 ~ receiver
  __ push(ecx);
  __ ret(0);

  // Otherwise we do a smi check and fall through to check if the return value
  // is a valid receiver.
  __ bind(&check_result);

  // If the result is a smi, it is *not* an object in the ECMA sense.
  __ JumpIfSmi(eax, &use_receiver, Label::kNear);

  // 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.
  STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE);
  __ CmpObjectType(eax, FIRST_JS_RECEIVER_TYPE, ecx);
  __ j(above_equal, &leave_and_return, Label::kNear);
  __ jmp(&use_receiver, Label::kNear);

  __ bind(&do_throw);
  // Restore context from the frame.
  __ mov(esi, Operand(ebp, ConstructFrameConstants::kContextOffset));
  __ CallRuntime(Runtime::kThrowConstructorReturnedNonObject);
  // This should be unreachable.
  __ int3();

  __ bind(&stack_overflow);
  // Restore context from the frame.
  __ mov(esi, Operand(ebp, ConstructFrameConstants::kContextOffset));
  __ CallRuntime(Runtime::kThrowStackOverflow);
  // This should be unreachable.
  __ int3();
}

void Builtins::Generate_JSBuiltinsConstructStub(MacroAssembler* masm) {
  Generate_JSBuiltinsConstructStubHelper(masm);
}

void Builtins::Generate_ConstructedNonConstructable(MacroAssembler* masm) {
  FrameScope scope(masm, StackFrame::INTERNAL);
  __ push(edi);
  __ CallRuntime(Runtime::kThrowConstructedNonConstructable);
}

namespace {

// Called with the native C calling convention. The corresponding function
// signature is either:
//
//   using JSEntryFunction = GeneratedCode<Address(
//       Address root_register_value, Address new_target, Address target,
//       Address receiver, intptr_t argc, Address** argv)>;
// or
//   using JSEntryFunction = GeneratedCode<Address(
//       Address root_register_value, MicrotaskQueue* microtask_queue)>;
void Generate_JSEntryVariant(MacroAssembler* masm, StackFrame::Type type,
                             Builtins::Name entry_trampoline) {
  Label invoke, handler_entry, exit;
  Label not_outermost_js, not_outermost_js_2;

  {  // NOLINT. Scope block confuses linter.
    NoRootArrayScope uninitialized_root_register(masm);

    // Set up frame.
    __ push(ebp);
    __ mov(ebp, esp);

    // Push marker in two places.
    __ push(Immediate(StackFrame::TypeToMarker(type)));
    // Reserve a slot for the context. It is filled after the root register has
    // been set up.
    __ AllocateStackSpace(kSystemPointerSize);
    // Save callee-saved registers (C calling conventions).
    __ push(edi);
    __ push(esi);
    __ push(ebx);

    // Initialize the root register based on the given Isolate* argument.
    // C calling convention. The first argument is passed on the stack.
    __ mov(kRootRegister,
           Operand(ebp, EntryFrameConstants::kRootRegisterValueOffset));
  }

  // Save copies of the top frame descriptor on the stack.
  ExternalReference c_entry_fp = ExternalReference::Create(
      IsolateAddressId::kCEntryFPAddress, masm->isolate());
  __ push(__ ExternalReferenceAsOperand(c_entry_fp, edi));

  // Store the context address in the previously-reserved slot.
  ExternalReference context_address = ExternalReference::Create(
      IsolateAddressId::kContextAddress, masm->isolate());
  __ mov(edi, __ ExternalReferenceAsOperand(context_address, edi));
  static constexpr int kOffsetToContextSlot = -2 * kSystemPointerSize;
  __ mov(Operand(ebp, kOffsetToContextSlot), edi);

  // If this is the outermost JS call, set js_entry_sp value.
  ExternalReference js_entry_sp = ExternalReference::Create(
      IsolateAddressId::kJSEntrySPAddress, masm->isolate());
  __ cmp(__ ExternalReferenceAsOperand(js_entry_sp, edi), Immediate(0));
  __ j(not_equal, &not_outermost_js, Label::kNear);
  __ mov(__ ExternalReferenceAsOperand(js_entry_sp, edi), ebp);
  __ push(Immediate(StackFrame::OUTERMOST_JSENTRY_FRAME));
  __ jmp(&invoke, Label::kNear);
  __ bind(&not_outermost_js);
  __ push(Immediate(StackFrame::INNER_JSENTRY_FRAME));

  // Jump to a faked try block that does the invoke, with a faked catch
  // block that sets the pending exception.
  __ jmp(&invoke);
  __ bind(&handler_entry);

  // Store the current pc as the handler offset. It's used later to create the
  // handler table.
  masm->isolate()->builtins()->SetJSEntryHandlerOffset(handler_entry.pos());

  // Caught exception: Store result (exception) in the pending exception
  // field in the JSEnv and return a failure sentinel.
  ExternalReference pending_exception = ExternalReference::Create(
      IsolateAddressId::kPendingExceptionAddress, masm->isolate());
  __ mov(__ ExternalReferenceAsOperand(pending_exception, edi), eax);
  __ Move(eax, masm->isolate()->factory()->exception());
  __ jmp(&exit);

  // Invoke: Link this frame into the handler chain.
  __ bind(&invoke);
  __ PushStackHandler(edi);

  // Invoke the function by calling through JS entry trampoline builtin and
  // pop the faked function when we return.
  Handle<Code> trampoline_code =
      masm->isolate()->builtins()->builtin_handle(entry_trampoline);
  __ Call(trampoline_code, RelocInfo::CODE_TARGET);

  // Unlink this frame from the handler chain.
  __ PopStackHandler(edi);

  __ bind(&exit);

  // Check if the current stack frame is marked as the outermost JS frame.
  __ pop(edi);
  __ cmp(edi, Immediate(StackFrame::OUTERMOST_JSENTRY_FRAME));
  __ j(not_equal, &not_outermost_js_2);
  __ mov(__ ExternalReferenceAsOperand(js_entry_sp, edi), Immediate(0));
  __ bind(&not_outermost_js_2);

  // Restore the top frame descriptor from the stack.
  __ pop(__ ExternalReferenceAsOperand(c_entry_fp, edi));

  // Restore callee-saved registers (C calling conventions).
  __ pop(ebx);
  __ pop(esi);
  __ pop(edi);
  __ add(esp, Immediate(2 * kSystemPointerSize));  // remove markers

  // Restore frame pointer and return.
  __ pop(ebp);
  __ ret(0);
}

}  // namespace

void Builtins::Generate_JSEntry(MacroAssembler* masm) {
  Generate_JSEntryVariant(masm, StackFrame::ENTRY,
                          Builtins::kJSEntryTrampoline);
}

void Builtins::Generate_JSConstructEntry(MacroAssembler* masm) {
  Generate_JSEntryVariant(masm, StackFrame::CONSTRUCT_ENTRY,
                          Builtins::kJSConstructEntryTrampoline);
}

void Builtins::Generate_JSRunMicrotasksEntry(MacroAssembler* masm) {
  Generate_JSEntryVariant(masm, StackFrame::ENTRY,
                          Builtins::kRunMicrotasksTrampoline);
}

static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
                                             bool is_construct) {
  {
    FrameScope scope(masm, StackFrame::INTERNAL);

    const Register scratch1 = edx;
    const Register scratch2 = edi;

    // Setup the context (we need to use the caller context from the isolate).
    ExternalReference context_address = ExternalReference::Create(
        IsolateAddressId::kContextAddress, masm->isolate());
    __ mov(esi, __ ExternalReferenceAsOperand(context_address, scratch1));

    // Load the previous frame pointer (edx) to access C arguments
    __ mov(scratch1, Operand(ebp, 0));

    // Push the function.
    __ push(Operand(scratch1, EntryFrameConstants::kFunctionArgOffset));

    // Load the number of arguments and setup pointer to the arguments.
    __ mov(eax, Operand(scratch1, EntryFrameConstants::kArgcOffset));
    __ mov(scratch1, Operand(scratch1, EntryFrameConstants::kArgvOffset));

    // Check if we have enough stack space to push all arguments.
    // Argument count in eax. Clobbers ecx.
    Label enough_stack_space, stack_overflow;
    __ StackOverflowCheck(eax, ecx, &stack_overflow);
    __ jmp(&enough_stack_space);

    __ bind(&stack_overflow);
    __ CallRuntime(Runtime::kThrowStackOverflow);
    // This should be unreachable.
    __ int3();

    __ bind(&enough_stack_space);

    // Copy arguments to the stack in a loop.
    Label loop, entry;
    __ Move(ecx, eax);
    __ jmp(&entry, Label::kNear);
    __ bind(&loop);
    // Push the parameter from argv.
    __ mov(scratch2, Operand(scratch1, ecx, times_system_pointer_size, 0));
    __ push(Operand(scratch2, 0));  // dereference handle
    __ bind(&entry);
    __ dec(ecx);
    __ j(greater_equal, &loop);

    // Load the previous frame pointer to access C arguments
    __ mov(scratch2, Operand(ebp, 0));

    // Push the receiver onto the stack.
    __ push(Operand(scratch2, EntryFrameConstants::kReceiverArgOffset));

    // Get the new.target and function from the frame.
    __ mov(edx, Operand(scratch2, EntryFrameConstants::kNewTargetArgOffset));
    __ mov(edi, Operand(scratch2, EntryFrameConstants::kFunctionArgOffset));

    // Invoke the code.
    Handle<Code> builtin = is_construct
                               ? BUILTIN_CODE(masm->isolate(), Construct)
                               : masm->isolate()->builtins()->Call();
    __ Call(builtin, RelocInfo::CODE_TARGET);

    // Exit the internal frame. Notice that this also removes the empty.
    // context and the function left on the stack by the code
    // invocation.
  }
  __ ret(0);
}

void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) {
  Generate_JSEntryTrampolineHelper(masm, false);
}

void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) {
  Generate_JSEntryTrampolineHelper(masm, true);
}

void Builtins::Generate_RunMicrotasksTrampoline(MacroAssembler* masm) {
  // This expects two C++ function parameters passed by Invoke() in
  // execution.cc.
  //   r1: microtask_queue
  __ mov(RunMicrotasksDescriptor::MicrotaskQueueRegister(),
         Operand(ebp, EntryFrameConstants::kMicrotaskQueueArgOffset));
  __ Jump(BUILTIN_CODE(masm->isolate(), RunMicrotasks), RelocInfo::CODE_TARGET);
}

static void GetSharedFunctionInfoBytecode(MacroAssembler* masm,
                                          Register sfi_data,
                                          Register scratch1) {
  Label done;

  __ CmpObjectType(sfi_data, INTERPRETER_DATA_TYPE, scratch1);
  __ j(not_equal, &done, Label::kNear);
  __ mov(sfi_data,
         FieldOperand(sfi_data, InterpreterData::kBytecodeArrayOffset));

  __ bind(&done);
}

// static
void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- eax    : the value to pass to the generator
  //  -- edx    : the JSGeneratorObject to resume
  //  -- esp[0] : return address
  // -----------------------------------
  __ AssertGeneratorObject(edx);

  // Store input value into generator object.
  __ mov(FieldOperand(edx, JSGeneratorObject::kInputOrDebugPosOffset), eax);
  __ RecordWriteField(edx, JSGeneratorObject::kInputOrDebugPosOffset, eax, ecx,
                      kDontSaveFPRegs);

  // Load suspended function and context.
  __ mov(edi, FieldOperand(edx, JSGeneratorObject::kFunctionOffset));
  __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));

  // Flood function if we are stepping.
  Label prepare_step_in_if_stepping, prepare_step_in_suspended_generator;
  Label stepping_prepared;
  ExternalReference debug_hook =
      ExternalReference::debug_hook_on_function_call_address(masm->isolate());
  __ cmpb(__ ExternalReferenceAsOperand(debug_hook, ecx), Immediate(0));
  __ j(not_equal, &prepare_step_in_if_stepping);

  // Flood function if we need to continue stepping in the suspended generator.
  ExternalReference debug_suspended_generator =
      ExternalReference::debug_suspended_generator_address(masm->isolate());
  __ cmp(edx, __ ExternalReferenceAsOperand(debug_suspended_generator, ecx));
  __ j(equal, &prepare_step_in_suspended_generator);
  __ bind(&stepping_prepared);

  // 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 stack_overflow;
  __ CompareStackLimit(esp, StackLimitKind::kRealStackLimit);
  __ j(below, &stack_overflow);

  // Pop return address.
  __ PopReturnAddressTo(eax);

  // ----------- S t a t e -------------
  //  -- eax    : return address
  //  -- edx    : the JSGeneratorObject to resume
  //  -- edi    : generator function
  //  -- esi    : generator context
  // -----------------------------------

  {
    __ movd(xmm0, ebx);

    // Copy the function arguments from the generator object's register file.
    __ mov(ecx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
    __ movzx_w(ecx, FieldOperand(
                        ecx, SharedFunctionInfo::kFormalParameterCountOffset));
    __ mov(ebx,
           FieldOperand(edx, JSGeneratorObject::kParametersAndRegistersOffset));
    {
      Label done_loop, loop;
      __ mov(edi, ecx);

      __ bind(&loop);
      __ dec(edi);
      __ j(less, &done_loop);
      __ Push(
          FieldOperand(ebx, edi, times_tagged_size, FixedArray::kHeaderSize));
      __ jmp(&loop);

      __ bind(&done_loop);
    }

    // Push receiver.
    __ Push(FieldOperand(edx, JSGeneratorObject::kReceiverOffset));

    // Restore registers.
    __ mov(edi, FieldOperand(edx, JSGeneratorObject::kFunctionOffset));
    __ movd(ebx, xmm0);
  }

  // Underlying function needs to have bytecode available.
  if (FLAG_debug_code) {
    __ mov(ecx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
    __ mov(ecx, FieldOperand(ecx, SharedFunctionInfo::kFunctionDataOffset));
    __ Push(eax);
    GetSharedFunctionInfoBytecode(masm, ecx, eax);
    __ Pop(eax);
    __ CmpObjectType(ecx, BYTECODE_ARRAY_TYPE, ecx);
    __ Assert(equal, AbortReason::kMissingBytecodeArray);
  }

  // Resume (Ignition/TurboFan) generator object.
  {
    __ PushReturnAddressFrom(eax);
    __ mov(eax, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
    __ movzx_w(eax, FieldOperand(
                        eax, SharedFunctionInfo::kFormalParameterCountOffset));
    // We abuse new.target both to indicate that this is a resume call and to
    // pass in the generator object.  In ordinary calls, new.target is always
    // undefined because generator functions are non-constructable.
    static_assert(kJavaScriptCallCodeStartRegister == ecx, "ABI mismatch");
    __ mov(ecx, FieldOperand(edi, JSFunction::kCodeOffset));
    __ JumpCodeObject(ecx);
  }

  __ bind(&prepare_step_in_if_stepping);
  {
    FrameScope scope(masm, StackFrame::INTERNAL);
    __ Push(edx);
    __ Push(edi);
    // Push hole as receiver since we do not use it for stepping.
    __ PushRoot(RootIndex::kTheHoleValue);
    __ CallRuntime(Runtime::kDebugOnFunctionCall);
    __ Pop(edx);
    __ mov(edi, FieldOperand(edx, JSGeneratorObject::kFunctionOffset));
  }
  __ jmp(&stepping_prepared);

  __ bind(&prepare_step_in_suspended_generator);
  {
    FrameScope scope(masm, StackFrame::INTERNAL);
    __ Push(edx);
    __ CallRuntime(Runtime::kDebugPrepareStepInSuspendedGenerator);
    __ Pop(edx);
    __ mov(edi, FieldOperand(edx, JSGeneratorObject::kFunctionOffset));
  }
  __ jmp(&stepping_prepared);

  __ bind(&stack_overflow);
  {
    FrameScope scope(masm, StackFrame::INTERNAL);
    __ CallRuntime(Runtime::kThrowStackOverflow);
    __ int3();  // This should be unreachable.
  }
}

static void ReplaceClosureCodeWithOptimizedCode(MacroAssembler* masm,
                                                Register optimized_code,
                                                Register closure,
                                                Register scratch1,
                                                Register scratch2) {
  // Store the optimized code in the closure.
  __ mov(FieldOperand(closure, JSFunction::kCodeOffset), optimized_code);
  __ mov(scratch1, optimized_code);  // Write barrier clobbers scratch1 below.
  __ RecordWriteField(closure, JSFunction::kCodeOffset, scratch1, scratch2,
                      kDontSaveFPRegs, OMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
}

static void LeaveInterpreterFrame(MacroAssembler* masm, Register scratch1,
                                  Register scratch2) {
  Register params_size = scratch1;
  // Get the size of the formal parameters + receiver (in bytes).
  __ mov(params_size,
         Operand(ebp, InterpreterFrameConstants::kBytecodeArrayFromFp));
  __ mov(params_size,
         FieldOperand(params_size, BytecodeArray::kParameterSizeOffset));

#ifdef V8_NO_ARGUMENTS_ADAPTOR
  Register actual_params_size = scratch2;
  // Compute the size of the actual parameters + receiver (in bytes).
  __ mov(actual_params_size, Operand(ebp, StandardFrameConstants::kArgCOffset));
  __ lea(actual_params_size,
         Operand(actual_params_size, times_system_pointer_size,
                 kSystemPointerSize));

  // If actual is bigger than formal, then we should use it to free up the stack
  // arguments.
  Label corrected_args_count;
  __ cmp(params_size, actual_params_size);
  __ j(greater_equal, &corrected_args_count, Label::kNear);
  __ mov(params_size, actual_params_size);
  __ bind(&corrected_args_count);
#endif

  // Leave the frame (also dropping the register file).
  __ leave();

  // Drop receiver + arguments.
  Register return_pc = scratch2;
  __ PopReturnAddressTo(return_pc);
  __ add(esp, params_size);
  __ PushReturnAddressFrom(return_pc);
}

// Tail-call |function_id| if |actual_marker| == |expected_marker|
static void TailCallRuntimeIfMarkerEquals(MacroAssembler* masm,
                                          Register actual_marker,
                                          OptimizationMarker expected_marker,
                                          Runtime::FunctionId function_id) {
  Label no_match;
  __ cmp(actual_marker, expected_marker);
  __ j(not_equal, &no_match, Label::kNear);
  GenerateTailCallToReturnedCode(masm, function_id);
  __ bind(&no_match);
}

static void TailCallOptimizedCodeSlot(MacroAssembler* masm,
                                      Register optimized_code_entry) {
  // ----------- S t a t e -------------
  //  -- eax : actual argument count
  //  -- edx : new target (preserved for callee if needed, and caller)
  //  -- edi : target function (preserved for callee if needed, and caller)
  // -----------------------------------
  DCHECK(!AreAliased(edx, edi, optimized_code_entry));

  Register closure = edi;
  __ movd(xmm0, eax);
  __ movd(xmm1, edx);

  Label heal_optimized_code_slot;

  // If the optimized code is cleared, go to runtime to update the optimization
  // marker field.
  __ LoadWeakValue(optimized_code_entry, &heal_optimized_code_slot);

  // Check if the optimized code is marked for deopt. If it is, bailout to a
  // given label.
  __ mov(eax,
         FieldOperand(optimized_code_entry, Code::kCodeDataContainerOffset));
  __ test(FieldOperand(eax, CodeDataContainer::kKindSpecificFlagsOffset),
          Immediate(1 << Code::kMarkedForDeoptimizationBit));
  __ j(not_zero, &heal_optimized_code_slot);

  // Optimized code is good, get it into the closure and link the closure
  // into the optimized functions list, then tail call the optimized code.
  ReplaceClosureCodeWithOptimizedCode(masm, optimized_code_entry, closure, edx,
                                      eax);
  static_assert(kJavaScriptCallCodeStartRegister == ecx, "ABI mismatch");
  __ LoadCodeObjectEntry(ecx, optimized_code_entry);
  __ movd(edx, xmm1);
  __ movd(eax, xmm0);
  __ jmp(ecx);

  // Optimized code slot contains deoptimized code or code is cleared and
  // optimized code marker isn't updated. Evict the code, update the marker
  // and re-enter the closure's code.
  __ bind(&heal_optimized_code_slot);
  __ movd(edx, xmm1);
  __ movd(eax, xmm0);
  GenerateTailCallToReturnedCode(masm, Runtime::kHealOptimizedCodeSlot);
}

static void MaybeOptimizeCode(MacroAssembler* masm,
                              Register optimization_marker) {
  // ----------- S t a t e -------------
  //  -- eax : actual argument count
  //  -- edx : new target (preserved for callee if needed, and caller)
  //  -- edi : target function (preserved for callee if needed, and caller)
  //  -- optimization_marker : a Smi containing a non-zero optimization marker.
  // -----------------------------------
  DCHECK(!AreAliased(edx, edi, optimization_marker));

  // TODO(v8:8394): The logging of first execution will break if
  // feedback vectors are not allocated. We need to find a different way of
  // logging these events if required.
  TailCallRuntimeIfMarkerEquals(masm, optimization_marker,
                                OptimizationMarker::kLogFirstExecution,
                                Runtime::kFunctionFirstExecution);
  TailCallRuntimeIfMarkerEquals(masm, optimization_marker,
                                OptimizationMarker::kCompileOptimized,
                                Runtime::kCompileOptimized_NotConcurrent);
  TailCallRuntimeIfMarkerEquals(masm, optimization_marker,
                                OptimizationMarker::kCompileOptimizedConcurrent,
                                Runtime::kCompileOptimized_Concurrent);

  // Marker should be one of LogFirstExecution / CompileOptimized /
  // CompileOptimizedConcurrent. InOptimizationQueue and None shouldn't reach
  // here.
  if (FLAG_debug_code) {
    __ int3();
  }
}

// Advance the current bytecode offset. This simulates what all bytecode
// handlers do upon completion of the underlying operation. Will bail out to a
// label if the bytecode (without prefix) is a return bytecode. Will not advance
// the bytecode offset if the current bytecode is a JumpLoop, instead just
// re-executing the JumpLoop to jump to the correct bytecode.
static void AdvanceBytecodeOffsetOrReturn(MacroAssembler* masm,
                                          Register bytecode_array,
                                          Register bytecode_offset,
                                          Register scratch1, Register scratch2,
                                          Register scratch3, Label* if_return) {
  Register bytecode_size_table = scratch1;
  Register bytecode = scratch2;

  // The bytecode offset value will be increased by one in wide and extra wide
  // cases. In the case of having a wide or extra wide JumpLoop bytecode, we
  // will restore the original bytecode. In order to simplify the code, we have
  // a backup of it.
  Register original_bytecode_offset = scratch3;
  DCHECK(!AreAliased(bytecode_array, bytecode_offset, bytecode_size_table,
                     bytecode, original_bytecode_offset));
  __ Move(bytecode_size_table,
          Immediate(ExternalReference::bytecode_size_table_address()));

  // Load the current bytecode.
  __ movzx_b(bytecode, Operand(bytecode_array, bytecode_offset, times_1, 0));
  __ Move(original_bytecode_offset, bytecode_offset);

  // Check if the bytecode is a Wide or ExtraWide prefix bytecode.
  Label process_bytecode, extra_wide;
  STATIC_ASSERT(0 == static_cast<int>(interpreter::Bytecode::kWide));
  STATIC_ASSERT(1 == static_cast<int>(interpreter::Bytecode::kExtraWide));
  STATIC_ASSERT(2 == static_cast<int>(interpreter::Bytecode::kDebugBreakWide));
  STATIC_ASSERT(3 ==
                static_cast<int>(interpreter::Bytecode::kDebugBreakExtraWide));
  __ cmp(bytecode, Immediate(0x3));
  __ j(above, &process_bytecode, Label::kNear);
  // The code to load the next bytecode is common to both wide and extra wide.
  // We can hoist them up here. inc has to happen before test since it
  // modifies the ZF flag.
  __ inc(bytecode_offset);
  __ test(bytecode, Immediate(0x1));
  __ movzx_b(bytecode, Operand(bytecode_array, bytecode_offset, times_1, 0));
  __ j(not_equal, &extra_wide, Label::kNear);

  // Load the next bytecode and update table to the wide scaled table.
  __ add(bytecode_size_table,
         Immediate(kIntSize * interpreter::Bytecodes::kBytecodeCount));
  __ jmp(&process_bytecode, Label::kNear);

  __ bind(&extra_wide);
  // Update table to the extra wide scaled table.
  __ add(bytecode_size_table,
         Immediate(2 * kIntSize * interpreter::Bytecodes::kBytecodeCount));

  __ bind(&process_bytecode);

// Bailout to the return label if this is a return bytecode.
#define JUMP_IF_EQUAL(NAME)                                            \
  __ cmp(bytecode,                                                     \
         Immediate(static_cast<int>(interpreter::Bytecode::k##NAME))); \
  __ j(equal, if_return);
  RETURN_BYTECODE_LIST(JUMP_IF_EQUAL)
#undef JUMP_IF_EQUAL

  // If this is a JumpLoop, re-execute it to perform the jump to the beginning
  // of the loop.
  Label end, not_jump_loop;
  __ cmp(bytecode,
         Immediate(static_cast<int>(interpreter::Bytecode::kJumpLoop)));
  __ j(not_equal, &not_jump_loop, Label::kNear);
  // If this is a wide or extra wide JumpLoop, we need to restore the original
  // bytecode_offset since we might have increased it to skip the wide /
  // extra-wide prefix bytecode.
  __ Move(bytecode_offset, original_bytecode_offset);
  __ jmp(&end, Label::kNear);

  __ bind(&not_jump_loop);
  // Otherwise, load the size of the current bytecode and advance the offset.
  __ add(bytecode_offset,
         Operand(bytecode_size_table, bytecode, times_int_size, 0));

  __ bind(&end);
}

// 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 live registers are:
//   o eax: actual argument count (not including the receiver)
//   o edi: the JS function object being called
//   o edx: the incoming new target or generator object
//   o esi: our context
//   o ebp: the caller's frame pointer
//   o esp: stack pointer (pointing to return address)
//
// The function builds an interpreter frame.  See InterpreterFrameConstants in
// frames.h for its layout.
void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
  Register closure = edi;

  __ movd(xmm0, eax);  // Spill actual argument count.

  // The bytecode array could have been flushed from the shared function info,
  // if so, call into CompileLazy.
  Label compile_lazy;
  __ mov(ecx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
  __ mov(ecx, FieldOperand(ecx, SharedFunctionInfo::kFunctionDataOffset));
  GetSharedFunctionInfoBytecode(masm, ecx, eax);
  __ CmpObjectType(ecx, BYTECODE_ARRAY_TYPE, eax);
  __ j(not_equal, &compile_lazy);

  Register feedback_vector = ecx;
  Label push_stack_frame;
  // Load feedback vector and check if it is valid. If valid, check for
  // optimized code and update invocation count. Otherwise, setup the stack
  // frame.
  __ mov(feedback_vector,
         FieldOperand(closure, JSFunction::kFeedbackCellOffset));
  __ mov(feedback_vector, FieldOperand(feedback_vector, Cell::kValueOffset));
  __ mov(eax, FieldOperand(feedback_vector, HeapObject::kMapOffset));
  __ CmpInstanceType(eax, FEEDBACK_VECTOR_TYPE);
  __ j(not_equal, &push_stack_frame);

  // Load the optimization state from the feedback vector and re-use the
  // register.
  Register optimization_state = ecx;
  // Store feedback_vector. We may need it if we need to load the optimze code
  // slot entry.
  __ movd(xmm1, feedback_vector);
  __ mov(optimization_state,
         FieldOperand(feedback_vector, FeedbackVector::kFlagsOffset));

  // Check if there is optimized code or a optimization marker that needes to be
  // processed.
  Label has_optimized_code_or_marker;
  __ test(
      optimization_state,
      Immediate(FeedbackVector::kHasOptimizedCodeOrCompileOptimizedMarkerMask));
  __ j(not_zero, &has_optimized_code_or_marker);

  Label not_optimized;
  __ bind(&not_optimized);

  // Load the feedback vector and increment the invocation count.
  __ mov(feedback_vector,
         FieldOperand(closure, JSFunction::kFeedbackCellOffset));
  __ mov(feedback_vector, FieldOperand(feedback_vector, Cell::kValueOffset));
  __ inc(FieldOperand(feedback_vector, FeedbackVector::kInvocationCountOffset));

  // 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).
  __ bind(&push_stack_frame);
  FrameScope frame_scope(masm, StackFrame::MANUAL);
  __ push(ebp);  // Caller's frame pointer.
  __ mov(ebp, esp);
  __ push(kContextRegister);               // Callee's context.
  __ push(kJavaScriptCallTargetRegister);  // Callee's JS function.
  __ movd(kJavaScriptCallArgCountRegister, xmm0);
  __ push(kJavaScriptCallArgCountRegister);  // Actual argument count.

  // Get the bytecode array from the function object and load it into
  // kInterpreterBytecodeArrayRegister.
  __ mov(eax, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
  __ mov(kInterpreterBytecodeArrayRegister,
         FieldOperand(eax, SharedFunctionInfo::kFunctionDataOffset));
  GetSharedFunctionInfoBytecode(masm, kInterpreterBytecodeArrayRegister, eax);

  // Check function data field is actually a BytecodeArray object.
  if (FLAG_debug_code) {
    __ AssertNotSmi(kInterpreterBytecodeArrayRegister);
    __ CmpObjectType(kInterpreterBytecodeArrayRegister, BYTECODE_ARRAY_TYPE,
                     eax);
    __ Assert(
        equal,
        AbortReason::kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry);
  }

  // Reset code age and the OSR arming. The OSR field and BytecodeAgeOffset are
  // 8-bit fields next to each other, so we could just optimize by writing a
  // 16-bit. These static asserts guard our assumption is valid.
  STATIC_ASSERT(BytecodeArray::kBytecodeAgeOffset ==
                BytecodeArray::kOsrNestingLevelOffset + kCharSize);
  STATIC_ASSERT(BytecodeArray::kNoAgeBytecodeAge == 0);
  __ mov_w(FieldOperand(kInterpreterBytecodeArrayRegister,
                        BytecodeArray::kOsrNestingLevelOffset),
           Immediate(0));

  // Push bytecode array.
  __ push(kInterpreterBytecodeArrayRegister);
  // Push Smi tagged initial bytecode array offset.
  __ push(Immediate(Smi::FromInt(BytecodeArray::kHeaderSize - kHeapObjectTag)));

  // Allocate the local and temporary register file on the stack.
  Label stack_overflow;
  {
    // Load frame size from the BytecodeArray object.
    Register frame_size = ecx;
    __ mov(frame_size, FieldOperand(kInterpreterBytecodeArrayRegister,
                                    BytecodeArray::kFrameSizeOffset));

    // Do a stack check to ensure we don't go over the limit.
    __ mov(eax, esp);
    __ sub(eax, frame_size);
    __ CompareStackLimit(eax, StackLimitKind::kRealStackLimit);
    __ j(below, &stack_overflow);

    // If ok, push undefined as the initial value for all register file entries.
    Label loop_header;
    Label loop_check;
    __ LoadRoot(kInterpreterAccumulatorRegister, RootIndex::kUndefinedValue);
    __ jmp(&loop_check);
    __ bind(&loop_header);
    // TODO(rmcilroy): Consider doing more than one push per loop iteration.
    __ push(kInterpreterAccumulatorRegister);
    // Continue loop if not done.
    __ bind(&loop_check);
    __ sub(frame_size, Immediate(kSystemPointerSize));
    __ j(greater_equal, &loop_header);
  }

  // If the bytecode array has a valid incoming new target or generator object
  // register, initialize it with incoming value which was passed in edx.
  Label no_incoming_new_target_or_generator_register;
  __ mov(ecx, FieldOperand(
                  kInterpreterBytecodeArrayRegister,
                  BytecodeArray::kIncomingNewTargetOrGeneratorRegisterOffset));
  __ test(ecx, ecx);
  __ j(zero, &no_incoming_new_target_or_generator_register);
  __ mov(Operand(ebp, ecx, times_system_pointer_size, 0), edx);
  __ bind(&no_incoming_new_target_or_generator_register);

  // Perform interrupt stack check.
  // TODO(solanes): Merge with the real stack limit check above.
  Label stack_check_interrupt, after_stack_check_interrupt;
  __ CompareStackLimit(esp, StackLimitKind::kInterruptStackLimit);
  __ j(below, &stack_check_interrupt);
  __ bind(&after_stack_check_interrupt);

  // The accumulator is already loaded with undefined.

  __ mov(kInterpreterBytecodeOffsetRegister,
         Immediate(BytecodeArray::kHeaderSize - kHeapObjectTag));

  // Load the dispatch table into a register and dispatch to the bytecode
  // handler at the current bytecode offset.
  Label do_dispatch;
  __ bind(&do_dispatch);
  __ Move(kInterpreterDispatchTableRegister,
          Immediate(ExternalReference::interpreter_dispatch_table_address(
              masm->isolate())));
  __ movzx_b(ecx, Operand(kInterpreterBytecodeArrayRegister,
                          kInterpreterBytecodeOffsetRegister, times_1, 0));
  __ mov(kJavaScriptCallCodeStartRegister,
         Operand(kInterpreterDispatchTableRegister, ecx,
                 times_system_pointer_size, 0));
  __ call(kJavaScriptCallCodeStartRegister);
  masm->isolate()->heap()->SetInterpreterEntryReturnPCOffset(masm->pc_offset());

  // Any returns to the entry trampoline are either due to the return bytecode
  // or the interpreter tail calling a builtin and then a dispatch.

  // Get bytecode array and bytecode offset from the stack frame.
  __ mov(kInterpreterBytecodeArrayRegister,
         Operand(ebp, InterpreterFrameConstants::kBytecodeArrayFromFp));
  __ mov(kInterpreterBytecodeOffsetRegister,
         Operand(ebp, InterpreterFrameConstants::kBytecodeOffsetFromFp));
  __ SmiUntag(kInterpreterBytecodeOffsetRegister);

  // Either return, or advance to the next bytecode and dispatch.
  Label do_return;
  __ Push(eax);
  AdvanceBytecodeOffsetOrReturn(masm, kInterpreterBytecodeArrayRegister,
                                kInterpreterBytecodeOffsetRegister, ecx,
                                kInterpreterDispatchTableRegister, eax,
                                &do_return);
  __ Pop(eax);
  __ jmp(&do_dispatch);

  __ bind(&do_return);
  __ Pop(eax);
  // The return value is in eax.
  LeaveInterpreterFrame(masm, edx, ecx);
  __ ret(0);

  __ bind(&stack_check_interrupt);
  // Modify the bytecode offset in the stack to be kFunctionEntryBytecodeOffset
  // for the call to the StackGuard.
  __ mov(Operand(ebp, InterpreterFrameConstants::kBytecodeOffsetFromFp),
         Immediate(Smi::FromInt(BytecodeArray::kHeaderSize - kHeapObjectTag +
                                kFunctionEntryBytecodeOffset)));
  __ CallRuntime(Runtime::kStackGuard);

  // After the call, restore the bytecode array, bytecode offset and accumulator
  // registers again. Also, restore the bytecode offset in the stack to its
  // previous value.
  __ mov(kInterpreterBytecodeArrayRegister,
         Operand(ebp, InterpreterFrameConstants::kBytecodeArrayFromFp));
  __ mov(kInterpreterBytecodeOffsetRegister,
         Immediate(BytecodeArray::kHeaderSize - kHeapObjectTag));
  __ LoadRoot(kInterpreterAccumulatorRegister, RootIndex::kUndefinedValue);

  // It's ok to clobber kInterpreterBytecodeOffsetRegister since we are setting
  // it again after continuing.
  __ SmiTag(kInterpreterBytecodeOffsetRegister);
  __ mov(Operand(ebp, InterpreterFrameConstants::kBytecodeOffsetFromFp),
         kInterpreterBytecodeOffsetRegister);

  __ jmp(&after_stack_check_interrupt);

  __ bind(&has_optimized_code_or_marker);
  Label maybe_has_optimized_code;
  // Restore actual argument count.
  __ movd(eax, xmm0);

  // Check if optimized code is available
  __ test(
      optimization_state,
      Immediate(FeedbackVector::kHasCompileOptimizedOrLogFirstExecutionMarker));
  __ j(zero, &maybe_has_optimized_code);

  Register optimization_marker = optimization_state;
  __ DecodeField<FeedbackVector::OptimizationMarkerBits>(optimization_marker);
  MaybeOptimizeCode(masm, optimization_marker);
  // Fall through if there's no runnable optimized code.
  __ jmp(&not_optimized);

  __ bind(&maybe_has_optimized_code);
  Register optimized_code_entry = optimization_marker;
  __ movd(optimized_code_entry, xmm1);
  __ mov(
      optimized_code_entry,
      FieldOperand(feedback_vector, FeedbackVector::kMaybeOptimizedCodeOffset));
  TailCallOptimizedCodeSlot(masm, optimized_code_entry);

  __ bind(&compile_lazy);
  // Restore actual argument count.
  __ movd(eax, xmm0);
  GenerateTailCallToReturnedCode(masm, Runtime::kCompileLazy);

  __ bind(&stack_overflow);
  __ CallRuntime(Runtime::kThrowStackOverflow);
  __ int3();  // Should not return.
}


static void Generate_InterpreterPushArgs(MacroAssembler* masm,
                                         Register array_limit,
                                         Register start_address) {
  // ----------- S t a t e -------------
  //  -- start_address : Pointer to the last argument in the args array.
  //  -- array_limit : Pointer to one before the first argument in the
  //                   args array.
  // -----------------------------------
  Label loop_header, loop_check;
  __ jmp(&loop_check);
  __ bind(&loop_header);
  __ Push(Operand(array_limit, 0));
  __ bind(&loop_check);
  __ add(array_limit, Immediate(kSystemPointerSize));
  __ cmp(array_limit, start_address);
  __ j(below_equal, &loop_header, Label::kNear);
}

// static
void Builtins::Generate_InterpreterPushArgsThenCallImpl(
    MacroAssembler* masm, ConvertReceiverMode receiver_mode,
    InterpreterPushArgsMode mode) {
  DCHECK(mode != InterpreterPushArgsMode::kArrayFunction);
  // ----------- S t a t e -------------
  //  -- eax : the number of arguments (not including the receiver)
  //  -- ecx : 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.
  //  -- edi : the target to call (can be any Object).
  // -----------------------------------

  const Register scratch = edx;
  const Register argv = ecx;

  Label stack_overflow;
  if (mode == InterpreterPushArgsMode::kWithFinalSpread) {
    // The spread argument should not be pushed.
    __ dec(eax);
  }

  // Add a stack check before pushing the arguments.
  __ StackOverflowCheck(eax, scratch, &stack_overflow, true);

  __ movd(xmm0, eax);  // Spill number of arguments.

  // Compute the expected number of arguments.
  __ mov(scratch, eax);

  // Pop return address to allow tail-call after pushing arguments.
  __ PopReturnAddressTo(eax);

  if (receiver_mode != ConvertReceiverMode::kNullOrUndefined) {
    __ add(scratch, Immediate(1));  // Add one for receiver.
  }

  // Find the address of the last argument.
  __ shl(scratch, kSystemPointerSizeLog2);
  __ neg(scratch);
  __ add(scratch, argv);

  if (mode == InterpreterPushArgsMode::kWithFinalSpread) {
    __ movd(xmm1, scratch);
    Generate_InterpreterPushArgs(masm, scratch, argv);
    // Pass the spread in the register ecx.
    __ movd(ecx, xmm1);
    __ mov(ecx, Operand(ecx, 0));
  } else {
    Generate_InterpreterPushArgs(masm, scratch, argv);
  }

  // Push "undefined" as the receiver arg if we need to.
  if (receiver_mode == ConvertReceiverMode::kNullOrUndefined) {
    __ PushRoot(RootIndex::kUndefinedValue);
  }

  __ PushReturnAddressFrom(eax);
  __ movd(eax, xmm0);  // Restore number of arguments.

  // Call the target.
  if (mode == InterpreterPushArgsMode::kWithFinalSpread) {
    __ Jump(BUILTIN_CODE(masm->isolate(), CallWithSpread),
            RelocInfo::CODE_TARGET);
  } else {
    __ Jump(masm->isolate()->builtins()->Call(ConvertReceiverMode::kAny),
            RelocInfo::CODE_TARGET);
  }

  __ bind(&stack_overflow);
  {
    __ TailCallRuntime(Runtime::kThrowStackOverflow);

    // This should be unreachable.
    __ int3();
  }
}

namespace {

// This function modifies start_addr, and only reads the contents of num_args
// register. scratch1 and scratch2 are used as temporary registers.
void Generate_InterpreterPushZeroAndArgsAndReturnAddress(
    MacroAssembler* masm, Register num_args, Register start_addr,
    Register scratch1, Register scratch2, int num_slots_to_move,
    Label* stack_overflow) {
  // We have to move return address and the temporary registers above it
  // before we can copy arguments onto the stack. To achieve this:
  // Step 1: Increment the stack pointer by num_args + 1 (for receiver).
  // Step 2: Move the return address and values around it to the top of stack.
  // Step 3: Copy the arguments into the correct locations.
  //  current stack    =====>    required stack layout
  // |             |            | return addr   | (2) <-- esp (1)
  // |             |            | addtl. slot   |
  // |             |            | arg N         | (3)
  // |             |            | ....          |
  // |             |            | arg 1         |
  // | return addr | <-- esp    | arg 0         |
  // | addtl. slot |            | receiver slot |

  // Check for stack overflow before we increment the stack pointer.
  __ StackOverflowCheck(num_args, scratch1, stack_overflow, true);

  // Step 1 - Update the stack pointer.

  __ lea(scratch1,
         Operand(num_args, times_system_pointer_size, kSystemPointerSize));
  __ AllocateStackSpace(scratch1);

  // Step 2 move return_address and slots around it to the correct locations.
  // Move from top to bottom, otherwise we may overwrite when num_args = 0 or 1,
  // basically when the source and destination overlap. We at least need one
  // extra slot for receiver, so no extra checks are required to avoid copy.
  for (int i = 0; i < num_slots_to_move + 1; i++) {
    __ mov(scratch1, Operand(esp, num_args, times_system_pointer_size,
                             (i + 1) * kSystemPointerSize));
    __ mov(Operand(esp, i * kSystemPointerSize), scratch1);
  }

  // Step 3 copy arguments to correct locations.
  // Slot meant for receiver contains return address. Reset it so that
  // we will not incorrectly interpret return address as an object.
  __ mov(Operand(esp, (num_slots_to_move + 1) * kSystemPointerSize),
         Immediate(0));
  __ mov(scratch1, Immediate(0));

  Label loop_header, loop_check;
  __ jmp(&loop_check);
  __ bind(&loop_header);
  __ mov(scratch2, Operand(start_addr, 0));
  __ mov(Operand(esp, scratch1, times_system_pointer_size,
                 (num_slots_to_move + 1) * kSystemPointerSize),
         scratch2);
  __ sub(start_addr, Immediate(kSystemPointerSize));
  __ bind(&loop_check);
  __ inc(scratch1);
  __ cmp(scratch1, eax);
  __ j(less_equal, &loop_header, Label::kNear);
}

}  // anonymous namespace

// static
void Builtins::Generate_InterpreterPushArgsThenConstructImpl(
    MacroAssembler* masm, InterpreterPushArgsMode mode) {
  // ----------- S t a t e -------------
  //  -- eax     : the number of arguments (not including the receiver)
  //  -- ecx     : 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.
  //  -- esp[0]  : return address
  //  -- esp[4]  : allocation site feedback (if available or undefined)
  //  -- esp[8]  : the new target
  //  -- esp[12] : the constructor
  // -----------------------------------
  Label stack_overflow;

  if (mode == InterpreterPushArgsMode::kWithFinalSpread) {
    // The spread argument should not be pushed.
    __ dec(eax);
  }

  // Push arguments and move return address and stack spill slots to the top of
  // stack. The eax register is readonly. The ecx register will be modified. edx
  // and edi are used as scratch registers.
  Generate_InterpreterPushZeroAndArgsAndReturnAddress(
      masm, eax, ecx, edx, edi,
      InterpreterPushArgsThenConstructDescriptor::kStackArgumentsCount,
      &stack_overflow);

  // Call the appropriate constructor. eax and ecx already contain intended
  // values, remaining registers still need to be initialized from the stack.

  if (mode == InterpreterPushArgsMode::kArrayFunction) {
    // Tail call to the array construct stub (still in the caller context at
    // this point).

    __ movd(xmm0, eax);  // Spill number of arguments.
    __ PopReturnAddressTo(eax);
    __ Pop(kJavaScriptCallExtraArg1Register);
    __ Pop(kJavaScriptCallNewTargetRegister);
    __ Pop(kJavaScriptCallTargetRegister);
    __ PushReturnAddressFrom(eax);

    __ AssertFunction(kJavaScriptCallTargetRegister);
    __ AssertUndefinedOrAllocationSite(kJavaScriptCallExtraArg1Register, eax);

    __ movd(eax, xmm0);  // Reload number of arguments.
    __ Jump(BUILTIN_CODE(masm->isolate(), ArrayConstructorImpl),
            RelocInfo::CODE_TARGET);
  } else if (mode == InterpreterPushArgsMode::kWithFinalSpread) {
    __ movd(xmm0, eax);  // Spill number of arguments.
    __ PopReturnAddressTo(eax);
    __ Drop(1);  // The allocation site is unused.
    __ Pop(kJavaScriptCallNewTargetRegister);
    __ Pop(kJavaScriptCallTargetRegister);
    // Pass the spread in the register ecx, overwriting ecx.
    __ mov(ecx, Operand(ecx, 0));
    __ PushReturnAddressFrom(eax);
    __ movd(eax, xmm0);  // Reload number of arguments.
    __ Jump(BUILTIN_CODE(masm->isolate(), ConstructWithSpread),
            RelocInfo::CODE_TARGET);
  } else {
    DCHECK_EQ(InterpreterPushArgsMode::kOther, mode);
    __ PopReturnAddressTo(ecx);
    __ Drop(1);  // The allocation site is unused.
    __ Pop(kJavaScriptCallNewTargetRegister);
    __ Pop(kJavaScriptCallTargetRegister);
    __ PushReturnAddressFrom(ecx);

    __ Jump(BUILTIN_CODE(masm->isolate(), Construct), RelocInfo::CODE_TARGET);
  }

  __ bind(&stack_overflow);
  __ TailCallRuntime(Runtime::kThrowStackOverflow);
  __ int3();
}

static void Generate_InterpreterEnterBytecode(MacroAssembler* masm) {
  // Set the return address to the correct point in the interpreter entry
  // trampoline.
  Label builtin_trampoline, trampoline_loaded;
  Smi interpreter_entry_return_pc_offset(
      masm->isolate()->heap()->interpreter_entry_return_pc_offset());
  DCHECK_NE(interpreter_entry_return_pc_offset, Smi::zero());

  static constexpr Register scratch = ecx;

  // If the SFI function_data is an InterpreterData, the function will have a
  // custom copy of the interpreter entry trampoline for profiling. If so,
  // get the custom trampoline, otherwise grab the entry address of the global
  // trampoline.
  __ mov(scratch, Operand(ebp, StandardFrameConstants::kFunctionOffset));
  __ mov(scratch, FieldOperand(scratch, JSFunction::kSharedFunctionInfoOffset));
  __ mov(scratch,
         FieldOperand(scratch, SharedFunctionInfo::kFunctionDataOffset));
  __ Push(eax);
  __ CmpObjectType(scratch, INTERPRETER_DATA_TYPE, eax);
  __ j(not_equal, &builtin_trampoline, Label::kNear);

  __ mov(scratch,
         FieldOperand(scratch, InterpreterData::kInterpreterTrampolineOffset));
  __ add(scratch, Immediate(Code::kHeaderSize - kHeapObjectTag));
  __ jmp(&trampoline_loaded, Label::kNear);

  __ bind(&builtin_trampoline);
  __ mov(scratch,
         __ ExternalReferenceAsOperand(
             ExternalReference::
                 address_of_interpreter_entry_trampoline_instruction_start(
                     masm->isolate()),
             scratch));

  __ bind(&trampoline_loaded);
  __ Pop(eax);
  __ add(scratch, Immediate(interpreter_entry_return_pc_offset.value()));
  __ push(scratch);

  // Initialize the dispatch table register.
  __ Move(kInterpreterDispatchTableRegister,
          Immediate(ExternalReference::interpreter_dispatch_table_address(
              masm->isolate())));

  // Get the bytecode array pointer from the frame.
  __ mov(kInterpreterBytecodeArrayRegister,
         Operand(ebp, InterpreterFrameConstants::kBytecodeArrayFromFp));

  if (FLAG_debug_code) {
    // Check function data field is actually a BytecodeArray object.
    __ AssertNotSmi(kInterpreterBytecodeArrayRegister);
    __ CmpObjectType(kInterpreterBytecodeArrayRegister, BYTECODE_ARRAY_TYPE,
                     scratch);
    __ Assert(
        equal,
        AbortReason::kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry);
  }

  // Get the target bytecode offset from the frame.
  __ mov(kInterpreterBytecodeOffsetRegister,
         Operand(ebp, InterpreterFrameConstants::kBytecodeOffsetFromFp));
  __ SmiUntag(kInterpreterBytecodeOffsetRegister);

  if (FLAG_debug_code) {
    Label okay;
    __ cmp(kInterpreterBytecodeOffsetRegister,
           Immediate(BytecodeArray::kHeaderSize - kHeapObjectTag));
    __ j(greater_equal, &okay, Label::kNear);
    __ int3();
    __ bind(&okay);
  }

  // Dispatch to the target bytecode.
  __ movzx_b(scratch, Operand(kInterpreterBytecodeArrayRegister,
                              kInterpreterBytecodeOffsetRegister, times_1, 0));
  __ mov(kJavaScriptCallCodeStartRegister,
         Operand(kInterpreterDispatchTableRegister, scratch,
                 times_system_pointer_size, 0));
  __ jmp(kJavaScriptCallCodeStartRegister);
}

void Builtins::Generate_InterpreterEnterBytecodeAdvance(MacroAssembler* masm) {
  // Get bytecode array and bytecode offset from the stack frame.
  __ mov(kInterpreterBytecodeArrayRegister,
         Operand(ebp, InterpreterFrameConstants::kBytecodeArrayFromFp));
  __ mov(kInterpreterBytecodeOffsetRegister,
         Operand(ebp, InterpreterFrameConstants::kBytecodeOffsetFromFp));
  __ SmiUntag(kInterpreterBytecodeOffsetRegister);

  Label enter_bytecode, function_entry_bytecode;
  __ cmp(kInterpreterBytecodeOffsetRegister,
         Immediate(BytecodeArray::kHeaderSize - kHeapObjectTag +
                   kFunctionEntryBytecodeOffset));
  __ j(equal, &function_entry_bytecode);

  // Advance to the next bytecode.
  Label if_return;
  __ Push(eax);
  AdvanceBytecodeOffsetOrReturn(masm, kInterpreterBytecodeArrayRegister,
                                kInterpreterBytecodeOffsetRegister, ecx, esi,
                                eax, &if_return);
  __ Pop(eax);

  __ bind(&enter_bytecode);
  // Convert new bytecode offset to a Smi and save in the stackframe.
  __ mov(ecx, kInterpreterBytecodeOffsetRegister);
  __ SmiTag(ecx);
  __ mov(Operand(ebp, InterpreterFrameConstants::kBytecodeOffsetFromFp), ecx);

  Generate_InterpreterEnterBytecode(masm);

  __ bind(&function_entry_bytecode);
  // If the code deoptimizes during the implicit function entry stack interrupt
  // check, it will have a bailout ID of kFunctionEntryBytecodeOffset, which is
  // not a valid bytecode offset. Detect this case and advance to the first
  // actual bytecode.
  __ mov(kInterpreterBytecodeOffsetRegister,
         Immediate(BytecodeArray::kHeaderSize - kHeapObjectTag));
  __ jmp(&enter_bytecode);

  // We should never take the if_return path.
  __ bind(&if_return);
  // No need to pop eax here since we will be aborting anyway.
  __ Abort(AbortReason::kInvalidBytecodeAdvance);
}

void Builtins::Generate_InterpreterEnterBytecodeDispatch(MacroAssembler* masm) {
  Generate_InterpreterEnterBytecode(masm);
}

namespace {
void Generate_ContinueToBuiltinHelper(MacroAssembler* masm,
                                      bool java_script_builtin,
                                      bool with_result) {
  const RegisterConfiguration* config(RegisterConfiguration::Default());
  int allocatable_register_count = config->num_allocatable_general_registers();
  if (with_result) {
    if (java_script_builtin) {
      // xmm0 is not included in the allocateable registers.
      __ movd(xmm0, eax);
    } else {
      // Overwrite the hole inserted by the deoptimizer with the return value
      // from the LAZY deopt point.
      __ mov(
          Operand(esp, config->num_allocatable_general_registers() *
                               kSystemPointerSize +
                           BuiltinContinuationFrameConstants::kFixedFrameSize),
          eax);
    }
  }

  // Replace the builtin index Smi on the stack with the start address of the
  // builtin loaded from the builtins table. The ret below will return to this
  // address.
  int offset_to_builtin_index = allocatable_register_count * kSystemPointerSize;
  __ mov(eax, Operand(esp, offset_to_builtin_index));
  __ LoadEntryFromBuiltinIndex(eax);
  __ mov(Operand(esp, offset_to_builtin_index), eax);

  for (int i = allocatable_register_count - 1; i >= 0; --i) {
    int code = config->GetAllocatableGeneralCode(i);
    __ pop(Register::from_code(code));
    if (java_script_builtin && code == kJavaScriptCallArgCountRegister.code()) {
      __ SmiUntag(Register::from_code(code));
    }
  }
  if (with_result && java_script_builtin) {
    // Overwrite the hole inserted by the deoptimizer with the return value from
    // the LAZY deopt point. eax contains the arguments count, the return value
    // from LAZY is always the last argument.
    __ movd(Operand(esp, eax, times_system_pointer_size,
                    BuiltinContinuationFrameConstants::kFixedFrameSize),
            xmm0);
  }
  __ mov(
      ebp,
      Operand(esp, BuiltinContinuationFrameConstants::kFixedFrameSizeFromFp));
  const int offsetToPC =
      BuiltinContinuationFrameConstants::kFixedFrameSizeFromFp -
      kSystemPointerSize;
  __ pop(Operand(esp, offsetToPC));
  __ Drop(offsetToPC / kSystemPointerSize);
  __ ret(0);
}
}  // namespace

void Builtins::Generate_ContinueToCodeStubBuiltin(MacroAssembler* masm) {
  Generate_ContinueToBuiltinHelper(masm, false, false);
}

void Builtins::Generate_ContinueToCodeStubBuiltinWithResult(
    MacroAssembler* masm) {
  Generate_ContinueToBuiltinHelper(masm, false, true);
}

void Builtins::Generate_ContinueToJavaScriptBuiltin(MacroAssembler* masm) {
  Generate_ContinueToBuiltinHelper(masm, true, false);
}

void Builtins::Generate_ContinueToJavaScriptBuiltinWithResult(
    MacroAssembler* masm) {
  Generate_ContinueToBuiltinHelper(masm, true, true);
}

void Builtins::Generate_NotifyDeoptimized(MacroAssembler* masm) {
  {
    FrameScope scope(masm, StackFrame::INTERNAL);
    __ CallRuntime(Runtime::kNotifyDeoptimized);
    // Tear down internal frame.
  }

  DCHECK_EQ(kInterpreterAccumulatorRegister.code(), eax.code());
  __ mov(eax, Operand(esp, 1 * kSystemPointerSize));
  __ ret(1 * kSystemPointerSize);  // Remove eax.
}

// static
void Builtins::Generate_FunctionPrototypeApply(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- eax     : argc
  //  -- esp[0]  : return address
  //  -- esp[1]  : receiver
  //  -- esp[2]  : thisArg
  //  -- esp[3]  : argArray
  // -----------------------------------

  // 1. Load receiver into xmm0, argArray into edx (if present), remove all
  // arguments from the stack (including the receiver), and push thisArg (if
  // present) instead.
  {
    Label no_arg_array, no_this_arg;
    StackArgumentsAccessor args(eax);
    // Spill receiver to allow the usage of edi as a scratch register.
    __ movd(xmm0, args[0]);

    __ LoadRoot(edx, RootIndex::kUndefinedValue);
    __ mov(edi, edx);
    __ test(eax, eax);
    __ j(zero, &no_this_arg, Label::kNear);
    {
      __ mov(edi, args[1]);
      __ cmp(eax, Immediate(1));
      __ j(equal, &no_arg_array, Label::kNear);
      __ mov(edx, args[2]);
      __ bind(&no_arg_array);
    }
    __ bind(&no_this_arg);
    __ PopReturnAddressTo(ecx);
    __ lea(esp,
           Operand(esp, eax, times_system_pointer_size, kSystemPointerSize));
    __ Push(edi);
    __ PushReturnAddressFrom(ecx);

    // Restore receiver to edi.
    __ movd(edi, xmm0);
  }

  // ----------- S t a t e -------------
  //  -- edx    : argArray
  //  -- edi    : receiver
  //  -- esp[0] : return address
  //  -- esp[4] : thisArg
  // -----------------------------------

  // 2. We don't need to check explicitly for callable receiver here,
  // since that's the first thing the Call/CallWithArrayLike builtins
  // will do.

  // 3. Tail call with no arguments if argArray is null or undefined.
  Label no_arguments;
  __ JumpIfRoot(edx, RootIndex::kNullValue, &no_arguments, Label::kNear);
  __ JumpIfRoot(edx, RootIndex::kUndefinedValue, &no_arguments, Label::kNear);

  // 4a. Apply the receiver to the given argArray.
  __ Jump(BUILTIN_CODE(masm->isolate(), CallWithArrayLike),
          RelocInfo::CODE_TARGET);

  // 4b. The argArray is either null or undefined, so we tail call without any
  // arguments to the receiver.
  __ bind(&no_arguments);
  {
    __ Set(eax, 0);
    __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
  }
}

// static
void Builtins::Generate_FunctionPrototypeCall(MacroAssembler* masm) {
  // Stack Layout:
  // esp[0]           : Return address
  // esp[8]           : Argument 0 (receiver: callable to call)
  // esp[16]          : Argument 1
  //  ...
  // esp[8 * n]       : Argument n-1
  // esp[8 * (n + 1)] : Argument n
  // eax contains the number of arguments, n, not counting the receiver.

  // 1. Get the callable to call (passed as receiver) from the stack.
  {
    StackArgumentsAccessor args(eax);
    __ mov(edi, args.GetReceiverOperand());
  }

  // 2. Save the return address and drop the callable.
  __ PopReturnAddressTo(edx);
  __ Pop(ecx);

  // 3. Make sure we have at least one argument.
  {
    Label done;
    __ test(eax, eax);
    __ j(not_zero, &done, Label::kNear);
    __ PushRoot(RootIndex::kUndefinedValue);
    __ inc(eax);
    __ bind(&done);
  }

  // 4. Push back the return address one slot down on the stack (overwriting the
  // original callable), making the original first argument the new receiver.
  __ PushReturnAddressFrom(edx);
  __ dec(eax);  // One fewer argument (first argument is new receiver).

  // 5. Call the callable.
  __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
}

void Builtins::Generate_ReflectApply(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- eax     : argc
  //  -- esp[0]  : return address
  //  -- esp[4]  : receiver
  //  -- esp[8]  : target         (if argc >= 1)
  //  -- esp[12] : thisArgument   (if argc >= 2)
  //  -- esp[16] : argumentsList  (if argc == 3)
  // -----------------------------------

  // 1. Load target into edi (if present), argumentsList into edx (if present),
  // remove all arguments from the stack (including the receiver), and push
  // thisArgument (if present) instead.
  {
    Label done;
    StackArgumentsAccessor args(eax);
    __ LoadRoot(edi, RootIndex::kUndefinedValue);
    __ mov(edx, edi);
    __ mov(ecx, edi);
    __ cmp(eax, Immediate(1));
    __ j(below, &done, Label::kNear);
    __ mov(edi, args[1]);  // target
    __ j(equal, &done, Label::kNear);
    __ mov(ecx, args[2]);  // thisArgument
    __ cmp(eax, Immediate(3));
    __ j(below, &done, Label::kNear);
    __ mov(edx, args[3]);  // argumentsList
    __ bind(&done);

    // Spill argumentsList to use edx as a scratch register.
    __ movd(xmm0, edx);

    __ PopReturnAddressTo(edx);
    __ lea(esp,
           Operand(esp, eax, times_system_pointer_size, kSystemPointerSize));
    __ Push(ecx);
    __ PushReturnAddressFrom(edx);

    // Restore argumentsList.
    __ movd(edx, xmm0);
  }

  // ----------- S t a t e -------------
  //  -- edx    : argumentsList
  //  -- edi    : target
  //  -- esp[0] : return address
  //  -- esp[4] : thisArgument
  // -----------------------------------

  // 2. We don't need to check explicitly for callable target here,
  // since that's the first thing the Call/CallWithArrayLike builtins
  // will do.

  // 3. Apply the target to the given argumentsList.
  __ Jump(BUILTIN_CODE(masm->isolate(), CallWithArrayLike),
          RelocInfo::CODE_TARGET);
}

void Builtins::Generate_ReflectConstruct(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- eax     : argc
  //  -- esp[0]  : return address
  //  -- esp[4]  : receiver
  //  -- esp[8]  : target
  //  -- esp[12] : argumentsList
  //  -- esp[16] : new.target (optional)
  // -----------------------------------

  // 1. Load target into edi (if present), argumentsList into ecx (if present),
  // new.target into edx (if present, otherwise use target), remove all
  // arguments from the stack (including the receiver), and push thisArgument
  // (if present) instead.
  {
    Label done;
    StackArgumentsAccessor args(eax);
    __ LoadRoot(edi, RootIndex::kUndefinedValue);
    __ mov(edx, edi);
    __ mov(ecx, edi);
    __ cmp(eax, Immediate(1));
    __ j(below, &done, Label::kNear);
    __ mov(edi, args[1]);  // target
    __ mov(edx, edi);
    __ j(equal, &done, Label::kNear);
    __ mov(ecx, args[2]);  // argumentsList
    __ cmp(eax, Immediate(3));
    __ j(below, &done, Label::kNear);
    __ mov(edx, args[3]);  // new.target
    __ bind(&done);

    // Spill argumentsList to use ecx as a scratch register.
    __ movd(xmm0, ecx);

    __ PopReturnAddressTo(ecx);
    __ lea(esp,
           Operand(esp, eax, times_system_pointer_size, kSystemPointerSize));
    __ PushRoot(RootIndex::kUndefinedValue);
    __ PushReturnAddressFrom(ecx);

    // Restore argumentsList.
    __ movd(ecx, xmm0);
  }

  // ----------- S t a t e -------------
  //  -- ecx    : argumentsList
  //  -- edx    : new.target
  //  -- edi    : target
  //  -- esp[0] : return address
  //  -- esp[4] : receiver (undefined)
  // -----------------------------------

  // 2. We don't need to check explicitly for constructor target here,
  // since that's the first thing the Construct/ConstructWithArrayLike
  // builtins will do.

  // 3. We don't need to check explicitly for constructor new.target here,
  // since that's the second thing the Construct/ConstructWithArrayLike
  // builtins will do.

  // 4. Construct the target with the given new.target and argumentsList.
  __ Jump(BUILTIN_CODE(masm->isolate(), ConstructWithArrayLike),
          RelocInfo::CODE_TARGET);
}

static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) {
  __ push(ebp);
  __ mov(ebp, esp);

  // Store the arguments adaptor context sentinel.
  __ push(Immediate(StackFrame::TypeToMarker(StackFrame::ARGUMENTS_ADAPTOR)));

  // Push the function on the stack.
  __ push(edi);

  // Preserve the number of arguments on the stack. Must preserve eax,
  // ebx and ecx because these registers are used when copying the
  // arguments and the receiver.
  STATIC_ASSERT(kSmiTagSize == 1);
  __ lea(edi, Operand(eax, eax, times_1, kSmiTag));
  __ push(edi);

  __ Push(Immediate(0));  // Padding.
}

static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) {
  // Retrieve the number of arguments from the stack.
  __ mov(edi, Operand(ebp, ArgumentsAdaptorFrameConstants::kLengthOffset));

  // Leave the frame.
  __ leave();

  // Remove caller arguments from the stack.
  STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0);
  __ PopReturnAddressTo(ecx);
  __ lea(esp, Operand(esp, edi, times_half_system_pointer_size,
                      1 * kSystemPointerSize));  // 1 ~ receiver
  __ PushReturnAddressFrom(ecx);
}

// static
void Builtins::Generate_CallOrConstructVarargs(MacroAssembler* masm,
                                               Handle<Code> code) {
  // ----------- S t a t e -------------
  //  -- edi    : target
  //  -- esi    : context for the Call / Construct builtin
  //  -- eax    : number of parameters on the stack (not including the receiver)
  //  -- ecx    : len (number of elements to from args)
  //  -- ecx    : new.target (checked to be constructor or undefined)
  //  -- esp[4] : arguments list (a FixedArray)
  //  -- esp[0] : return address.
  // -----------------------------------

  // We need to preserve eax, edi, esi and ebx.
  __ movd(xmm0, edx);
  __ movd(xmm1, edi);
  __ movd(xmm2, eax);
  __ movd(xmm3, esi);  // Spill the context.

  const Register kArgumentsList = esi;
  const Register kArgumentsLength = ecx;

  __ PopReturnAddressTo(edx);
  __ pop(kArgumentsList);
  __ PushReturnAddressFrom(edx);

  if (masm->emit_debug_code()) {
    // Allow kArgumentsList to be a FixedArray, or a FixedDoubleArray if
    // kArgumentsLength == 0.
    Label ok, fail;
    __ AssertNotSmi(kArgumentsList);
    __ mov(edx, FieldOperand(kArgumentsList, HeapObject::kMapOffset));
    __ CmpInstanceType(edx, FIXED_ARRAY_TYPE);
    __ j(equal, &ok);
    __ CmpInstanceType(edx, FIXED_DOUBLE_ARRAY_TYPE);
    __ j(not_equal, &fail);
    __ cmp(kArgumentsLength, 0);
    __ j(equal, &ok);
    // Fall through.
    __ bind(&fail);
    __ Abort(AbortReason::kOperandIsNotAFixedArray);

    __ bind(&ok);
  }

  // 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 stack_overflow;
  __ StackOverflowCheck(kArgumentsLength, edx, &stack_overflow);

  __ movd(xmm4, kArgumentsList);  // Spill the arguments list.

  // Move the arguments already in the stack,
  // including the receiver and the return address.
  {
    Label copy, check;
    Register src = edx, current = edi, tmp = esi;
    // Update stack pointer.
    __ mov(src, esp);
    __ lea(tmp, Operand(kArgumentsLength, times_system_pointer_size, 0));
    __ AllocateStackSpace(tmp);
    // Include return address and receiver.
    __ add(eax, Immediate(2));
    __ mov(current, Immediate(0));
    __ jmp(&check);
    // Loop.
    __ bind(&copy);
    __ mov(tmp, Operand(src, current, times_system_pointer_size, 0));
    __ mov(Operand(esp, current, times_system_pointer_size, 0), tmp);
    __ inc(current);
    __ bind(&check);
    __ cmp(current, eax);
    __ j(less, &copy);
    __ lea(edx, Operand(esp, eax, times_system_pointer_size, 0));
  }

  __ movd(kArgumentsList, xmm4);  // Recover arguments list.

  // Push additional arguments onto the stack.
  {
    __ Move(eax, Immediate(0));
    Label done, push, loop;
    __ bind(&loop);
    __ cmp(eax, kArgumentsLength);
    __ j(equal, &done, Label::kNear);
    // Turn the hole into undefined as we go.
    __ mov(edi, FieldOperand(kArgumentsList, eax, times_tagged_size,
                             FixedArray::kHeaderSize));
    __ CompareRoot(edi, RootIndex::kTheHoleValue);
    __ j(not_equal, &push, Label::kNear);
    __ LoadRoot(edi, RootIndex::kUndefinedValue);
    __ bind(&push);
    __ mov(Operand(edx, 0), edi);
    __ add(edx, Immediate(kSystemPointerSize));
    __ inc(eax);
    __ jmp(&loop);
    __ bind(&done);
  }

  // Restore eax, edi and edx.
  __ movd(esi, xmm3);  // Restore the context.
  __ movd(eax, xmm2);
  __ movd(edi, xmm1);
  __ movd(edx, xmm0);

  // Compute the actual parameter count.
  __ add(eax, kArgumentsLength);

  // Tail-call to the actual Call or Construct builtin.
  __ Jump(code, RelocInfo::CODE_TARGET);

  __ bind(&stack_overflow);
  __ movd(esi, xmm3);  // Restore the context.
  __ TailCallRuntime(Runtime::kThrowStackOverflow);
}

// static
void Builtins::Generate_CallOrConstructForwardVarargs(MacroAssembler* masm,
                                                      CallOrConstructMode mode,
                                                      Handle<Code> code) {
  // ----------- S t a t e -------------
  //  -- eax : the number of arguments (not including the receiver)
  //  -- edi : the target to call (can be any Object)
  //  -- esi : context for the Call / Construct builtin
  //  -- edx : the new target (for [[Construct]] calls)
  //  -- ecx : start index (to support rest parameters)
  // -----------------------------------

  __ movd(xmm0, esi);  // Spill the context.

  Register scratch = esi;

  // Check if new.target has a [[Construct]] internal method.
  if (mode == CallOrConstructMode::kConstruct) {
    Label new_target_constructor, new_target_not_constructor;
    __ JumpIfSmi(edx, &new_target_not_constructor, Label::kNear);
    __ mov(scratch, FieldOperand(edx, HeapObject::kMapOffset));
    __ test_b(FieldOperand(scratch, Map::kBitFieldOffset),
              Immediate(Map::Bits1::IsConstructorBit::kMask));
    __ j(not_zero, &new_target_constructor, Label::kNear);
    __ bind(&new_target_not_constructor);
    {
      FrameScope scope(masm, StackFrame::MANUAL);
      __ EnterFrame(StackFrame::INTERNAL);
      __ Push(edx);
      __ movd(esi, xmm0);  // Restore the context.
      __ CallRuntime(Runtime::kThrowNotConstructor);
    }
    __ bind(&new_target_constructor);
  }

  __ movd(xmm1, edx);  // Preserve new.target (in case of [[Construct]]).

#ifdef V8_NO_ARGUMENTS_ADAPTOR
  // TODO(victorgomes): Remove this copy when all the arguments adaptor frame
  // code is erased.
  __ mov(scratch, ebp);
  __ mov(edx, Operand(ebp, StandardFrameConstants::kArgCOffset));
#else
  // Check if we have an arguments adaptor frame below the function frame.
  Label arguments_adaptor, arguments_done;
  __ mov(scratch, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
  __ cmp(Operand(scratch, CommonFrameConstants::kContextOrFrameTypeOffset),
         Immediate(StackFrame::TypeToMarker(StackFrame::ARGUMENTS_ADAPTOR)));
  __ j(equal, &arguments_adaptor, Label::kNear);
  {
    __ mov(edx, Operand(ebp, StandardFrameConstants::kFunctionOffset));
    __ mov(edx, FieldOperand(edx, JSFunction::kSharedFunctionInfoOffset));
    __ movzx_w(edx, FieldOperand(
                        edx, SharedFunctionInfo::kFormalParameterCountOffset));
    __ mov(scratch, ebp);
  }
  __ jmp(&arguments_done, Label::kNear);
  __ bind(&arguments_adaptor);
  {
    // Just load the length from the ArgumentsAdaptorFrame.
    __ mov(edx,
           Operand(scratch, ArgumentsAdaptorFrameConstants::kLengthOffset));
    __ SmiUntag(edx);
  }
  __ bind(&arguments_done);
#endif

  Label stack_done, stack_overflow;
  __ sub(edx, ecx);
  __ j(less_equal, &stack_done);
  {
    // ----------- S t a t e -------------
    //  -- eax : the number of arguments already in the stack (not including the
    //  receiver)
    //  -- ecx : start index (to support rest parameters)
    //  -- edx : number of arguments to copy, i.e. arguments count - start index
    //  -- edi : the target to call (can be any Object)
    //  -- esi : point to the caller stack frame
    //  -- xmm0 : context for the Call / Construct builtin
    //  -- xmm1 : the new target (for [[Construct]] calls)
    // -----------------------------------

    // Forward the arguments from the caller frame.
    __ movd(xmm2, edi);  // Preserve the target to call.
    __ StackOverflowCheck(edx, edi, &stack_overflow);
    __ movd(xmm3, ebx);  // Preserve root register.

    Register scratch = ebx;

    // Point to the first argument to copy (skipping receiver).
    __ lea(ecx, Operand(ecx, times_system_pointer_size,
                        CommonFrameConstants::kFixedFrameSizeAboveFp +
                            kSystemPointerSize));
    __ add(esi, ecx);

    // Move the arguments already in the stack,
    // including the receiver and the return address.
    {
      Label copy, check;
      Register src = ecx, current = edi;
      // Update stack pointer.
      __ mov(src, esp);
      __ lea(scratch, Operand(edx, times_system_pointer_size, 0));
      __ AllocateStackSpace(scratch);
      // Include return address and receiver.
      __ add(eax, Immediate(2));
      __ Set(current, 0);
      __ jmp(&check);
      // Loop.
      __ bind(&copy);
      __ mov(scratch, Operand(src, current, times_system_pointer_size, 0));
      __ mov(Operand(esp, current, times_system_pointer_size, 0), scratch);
      __ inc(current);
      __ bind(&check);
      __ cmp(current, eax);
      __ j(less, &copy);
      __ lea(ecx, Operand(esp, eax, times_system_pointer_size, 0));
    }

    // Update total number of arguments.
    __ sub(eax, Immediate(2));
    __ add(eax, edx);

    // Copy the additional caller arguments onto the stack.
    // TODO(victorgomes): Consider using forward order as potentially more cache
    // friendly.
    {
      Register src = esi, dest = ecx, num = edx;
      Label loop;
      __ bind(&loop);
      __ dec(num);
      __ mov(scratch, Operand(src, num, times_system_pointer_size, 0));
      __ mov(Operand(dest, num, times_system_pointer_size, 0), scratch);
      __ j(not_zero, &loop);
    }

    __ movd(ebx, xmm3);  // Restore root register.
    __ movd(edi, xmm2);  // Restore the target to call.
  }
  __ bind(&stack_done);

  __ movd(edx, xmm1);  // Restore new.target (in case of [[Construct]]).
  __ movd(esi, xmm0);  // Restore the context.

  // Tail-call to the {code} handler.
  __ Jump(code, RelocInfo::CODE_TARGET);

  __ bind(&stack_overflow);
  __ movd(edi, xmm2);  // Restore the target to call.
  __ movd(esi, xmm0);  // Restore the context.
  __ TailCallRuntime(Runtime::kThrowStackOverflow);
}

// static
void Builtins::Generate_CallFunction(MacroAssembler* masm,
                                     ConvertReceiverMode mode) {
  // ----------- S t a t e -------------
  //  -- eax : the number of arguments (not including the receiver)
  //  -- edi : the function to call (checked to be a JSFunction)
  // -----------------------------------
  StackArgumentsAccessor args(eax);
  __ AssertFunction(edi);

  // See ES6 section 9.2.1 [[Call]] ( thisArgument, argumentsList)
  // Check that the function is not a "classConstructor".
  Label class_constructor;
  __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
  __ test(FieldOperand(edx, SharedFunctionInfo::kFlagsOffset),
          Immediate(SharedFunctionInfo::IsClassConstructorBit::kMask));
  __ j(not_zero, &class_constructor);

  // Enter the context of the function; ToObject has to run in the function
  // context, and we also need to take the global proxy from the function
  // context in case of conversion.
  __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
  // We need to convert the receiver for non-native sloppy mode functions.
  Label done_convert;
  __ test(FieldOperand(edx, SharedFunctionInfo::kFlagsOffset),
          Immediate(SharedFunctionInfo::IsNativeBit::kMask |
                    SharedFunctionInfo::IsStrictBit::kMask));
  __ j(not_zero, &done_convert);
  {
    // ----------- S t a t e -------------
    //  -- eax : the number of arguments (not including the receiver)
    //  -- edx : the shared function info.
    //  -- edi : the function to call (checked to be a JSFunction)
    //  -- esi : the function context.
    // -----------------------------------

    if (mode == ConvertReceiverMode::kNullOrUndefined) {
      // Patch receiver to global proxy.
      __ LoadGlobalProxy(ecx);
    } else {
      Label convert_to_object, convert_receiver;
      __ mov(ecx, args.GetReceiverOperand());
      __ JumpIfSmi(ecx, &convert_to_object, Label::kNear);
      STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE);
      __ CmpObjectType(ecx, FIRST_JS_RECEIVER_TYPE, ecx);  // Clobbers ecx.
      __ j(above_equal, &done_convert);
      // Reload the receiver (it was clobbered by CmpObjectType).
      __ mov(ecx, args.GetReceiverOperand());
      if (mode != ConvertReceiverMode::kNotNullOrUndefined) {
        Label convert_global_proxy;
        __ JumpIfRoot(ecx, RootIndex::kUndefinedValue, &convert_global_proxy,
                      Label::kNear);
        __ JumpIfNotRoot(ecx, RootIndex::kNullValue, &convert_to_object,
                         Label::kNear);
        __ bind(&convert_global_proxy);
        {
          // Patch receiver to global proxy.
          __ LoadGlobalProxy(ecx);
        }
        __ jmp(&convert_receiver);
      }
      __ bind(&convert_to_object);
      {
        // Convert receiver using ToObject.
        // TODO(bmeurer): Inline the allocation here to avoid building the frame
        // in the fast case? (fall back to AllocateInNewSpace?)
        FrameScope scope(masm, StackFrame::INTERNAL);
        __ SmiTag(eax);
        __ Push(eax);
        __ Push(edi);
        __ mov(eax, ecx);
        __ Push(esi);
        __ Call(BUILTIN_CODE(masm->isolate(), ToObject),
                RelocInfo::CODE_TARGET);
        __ Pop(esi);
        __ mov(ecx, eax);
        __ Pop(edi);
        __ Pop(eax);
        __ SmiUntag(eax);
      }
      __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
      __ bind(&convert_receiver);
    }
    __ mov(args.GetReceiverOperand(), ecx);
  }
  __ bind(&done_convert);

  // ----------- S t a t e -------------
  //  -- eax : the number of arguments (not including the receiver)
  //  -- edx : the shared function info.
  //  -- edi : the function to call (checked to be a JSFunction)
  //  -- esi : the function context.
  // -----------------------------------

  __ movzx_w(
      ecx, FieldOperand(edx, SharedFunctionInfo::kFormalParameterCountOffset));
  __ InvokeFunctionCode(edi, no_reg, ecx, eax, JUMP_FUNCTION);
  // The function is a "classConstructor", need to raise an exception.
  __ bind(&class_constructor);
  {
    FrameScope frame(masm, StackFrame::INTERNAL);
    __ push(edi);
    __ CallRuntime(Runtime::kThrowConstructorNonCallableError);
  }
}

namespace {

void Generate_PushBoundArguments(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- eax : the number of arguments (not including the receiver)
  //  -- edx : new.target (only in case of [[Construct]])
  //  -- edi : target (checked to be a JSBoundFunction)
  // -----------------------------------
  __ movd(xmm0, edx);  // Spill edx.

  // Load [[BoundArguments]] into ecx and length of that into edx.
  Label no_bound_arguments;
  __ mov(ecx, FieldOperand(edi, JSBoundFunction::kBoundArgumentsOffset));
  __ mov(edx, FieldOperand(ecx, FixedArray::kLengthOffset));
  __ SmiUntag(edx);
  __ test(edx, edx);
  __ j(zero, &no_bound_arguments);
  {
    // ----------- S t a t e -------------
    //  -- eax  : the number of arguments (not including the receiver)
    //  -- xmm0 : new.target (only in case of [[Construct]])
    //  -- edi  : target (checked to be a JSBoundFunction)
    //  -- ecx  : the [[BoundArguments]] (implemented as FixedArray)
    //  -- edx  : the number of [[BoundArguments]]
    // -----------------------------------

    // Check the stack for overflow.
    {
      Label done, stack_overflow;
      __ StackOverflowCheck(edx, ecx, &stack_overflow);
      __ jmp(&done);
      __ bind(&stack_overflow);
      {
        FrameScope frame(masm, StackFrame::MANUAL);
        __ CallRuntime(Runtime::kThrowStackOverflow);
        __ int3();
      }
      __ bind(&done);
    }

    // Spill context.
    __ movd(xmm3, esi);

    // Save Return Adress and Receiver into registers.
    __ pop(esi);
    __ movd(xmm1, esi);
    __ pop(esi);
    __ movd(xmm2, esi);

    // Push [[BoundArguments]] to the stack.
    {
      Label loop;
      __ mov(ecx, FieldOperand(edi, JSBoundFunction::kBoundArgumentsOffset));
      __ mov(edx, FieldOperand(ecx, FixedArray::kLengthOffset));
      __ SmiUntag(edx);
      // Adjust effective number of arguments (eax contains the number of
      // arguments from the call not including receiver plus the number of
      // [[BoundArguments]]).
      __ add(eax, edx);
      __ bind(&loop);
      __ dec(edx);
      __ mov(esi, FieldOperand(ecx, edx, times_tagged_size,
                               FixedArray::kHeaderSize));
      __ push(esi);
      __ j(greater, &loop);
    }

    // Restore Receiver and Return Address.
    __ movd(esi, xmm2);
    __ push(esi);
    __ movd(esi, xmm1);
    __ push(esi);

    // Restore context.
    __ movd(esi, xmm3);
  }

  __ bind(&no_bound_arguments);
  __ movd(edx, xmm0);  // Reload edx.
}

}  // namespace

// static
void Builtins::Generate_CallBoundFunctionImpl(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- eax : the number of arguments (not including the receiver)
  //  -- edi : the function to call (checked to be a JSBoundFunction)
  // -----------------------------------
  __ AssertBoundFunction(edi);

  // Patch the receiver to [[BoundThis]].
  StackArgumentsAccessor args(eax);
  __ mov(ecx, FieldOperand(edi, JSBoundFunction::kBoundThisOffset));
  __ mov(args.GetReceiverOperand(), ecx);

  // Push the [[BoundArguments]] onto the stack.
  Generate_PushBoundArguments(masm);

  // Call the [[BoundTargetFunction]] via the Call builtin.
  __ mov(edi, FieldOperand(edi, JSBoundFunction::kBoundTargetFunctionOffset));
  __ Jump(BUILTIN_CODE(masm->isolate(), Call_ReceiverIsAny),
          RelocInfo::CODE_TARGET);
}

// static
void Builtins::Generate_Call(MacroAssembler* masm, ConvertReceiverMode mode) {
  // ----------- S t a t e -------------
  //  -- eax : the number of arguments (not including the receiver)
  //  -- edi : the target to call (can be any Object).
  // -----------------------------------
  StackArgumentsAccessor args(eax);

  Label non_callable, non_function, non_smi, non_jsfunction,
      non_jsboundfunction;
  __ JumpIfSmi(edi, &non_callable);
  __ bind(&non_smi);
  __ CmpObjectType(edi, JS_FUNCTION_TYPE, ecx);
  __ j(not_equal, &non_jsfunction);
  __ Jump(masm->isolate()->builtins()->CallFunction(mode),
          RelocInfo::CODE_TARGET);

  __ bind(&non_jsfunction);
  __ CmpInstanceType(ecx, JS_BOUND_FUNCTION_TYPE);
  __ j(not_equal, &non_jsboundfunction);
  __ Jump(BUILTIN_CODE(masm->isolate(), CallBoundFunction),
          RelocInfo::CODE_TARGET);

  // Check if target is a proxy and call CallProxy external builtin
  __ bind(&non_jsboundfunction);
  __ test_b(FieldOperand(ecx, Map::kBitFieldOffset),
            Immediate(Map::Bits1::IsCallableBit::kMask));
  __ j(zero, &non_callable);

  // Call CallProxy external builtin
  __ CmpInstanceType(ecx, JS_PROXY_TYPE);
  __ j(not_equal, &non_function);
  __ Jump(BUILTIN_CODE(masm->isolate(), CallProxy), RelocInfo::CODE_TARGET);

  // 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.
  __ mov(args.GetReceiverOperand(), edi);
  // Let the "call_as_function_delegate" take care of the rest.
  __ LoadNativeContextSlot(edi, Context::CALL_AS_FUNCTION_DELEGATE_INDEX);
  __ Jump(masm->isolate()->builtins()->CallFunction(
              ConvertReceiverMode::kNotNullOrUndefined),
          RelocInfo::CODE_TARGET);

  // 3. Call to something that is not callable.
  __ bind(&non_callable);
  {
    FrameScope scope(masm, StackFrame::INTERNAL);
    __ Push(edi);
    __ CallRuntime(Runtime::kThrowCalledNonCallable);
  }
}

// static
void Builtins::Generate_ConstructFunction(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- eax : the number of arguments (not including the receiver)
  //  -- edx : the new target (checked to be a constructor)
  //  -- edi : the constructor to call (checked to be a JSFunction)
  // -----------------------------------
  __ AssertConstructor(edi);
  __ AssertFunction(edi);

  Label call_generic_stub;

  // Jump to JSBuiltinsConstructStub or JSConstructStubGeneric.
  __ mov(ecx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
  __ test(FieldOperand(ecx, SharedFunctionInfo::kFlagsOffset),
          Immediate(SharedFunctionInfo::ConstructAsBuiltinBit::kMask));
  __ j(zero, &call_generic_stub, Label::kNear);

  // Calling convention for function specific ConstructStubs require
  // ecx to contain either an AllocationSite or undefined.
  __ LoadRoot(ecx, RootIndex::kUndefinedValue);
  __ Jump(BUILTIN_CODE(masm->isolate(), JSBuiltinsConstructStub),
          RelocInfo::CODE_TARGET);

  __ bind(&call_generic_stub);
  // Calling convention for function specific ConstructStubs require
  // ecx to contain either an AllocationSite or undefined.
  __ LoadRoot(ecx, RootIndex::kUndefinedValue);
  __ Jump(BUILTIN_CODE(masm->isolate(), JSConstructStubGeneric),
          RelocInfo::CODE_TARGET);
}

// static
void Builtins::Generate_ConstructBoundFunction(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- eax : the number of arguments (not including the receiver)
  //  -- edx : the new target (checked to be a constructor)
  //  -- edi : the constructor to call (checked to be a JSBoundFunction)
  // -----------------------------------
  __ AssertConstructor(edi);
  __ AssertBoundFunction(edi);

  // Push the [[BoundArguments]] onto the stack.
  Generate_PushBoundArguments(masm);

  // Patch new.target to [[BoundTargetFunction]] if new.target equals target.
  {
    Label done;
    __ cmp(edi, edx);
    __ j(not_equal, &done, Label::kNear);
    __ mov(edx, FieldOperand(edi, JSBoundFunction::kBoundTargetFunctionOffset));
    __ bind(&done);
  }

  // Construct the [[BoundTargetFunction]] via the Construct builtin.
  __ mov(edi, FieldOperand(edi, JSBoundFunction::kBoundTargetFunctionOffset));
  __ Jump(BUILTIN_CODE(masm->isolate(), Construct), RelocInfo::CODE_TARGET);
}

// static
void Builtins::Generate_Construct(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- eax : the number of arguments (not including the receiver)
  //  -- edx : the new target (either the same as the constructor or
  //           the JSFunction on which new was invoked initially)
  //  -- edi : the constructor to call (can be any Object)
  // -----------------------------------
  StackArgumentsAccessor args(eax);

  // Check if target is a Smi.
  Label non_constructor, non_proxy, non_jsfunction, non_jsboundfunction;
  __ JumpIfSmi(edi, &non_constructor);

  // Check if target has a [[Construct]] internal method.
  __ mov(ecx, FieldOperand(edi, HeapObject::kMapOffset));
  __ test_b(FieldOperand(ecx, Map::kBitFieldOffset),
            Immediate(Map::Bits1::IsConstructorBit::kMask));
  __ j(zero, &non_constructor);

  // Dispatch based on instance type.
  __ CmpInstanceType(ecx, JS_FUNCTION_TYPE);
  __ j(not_equal, &non_jsfunction);
  __ Jump(BUILTIN_CODE(masm->isolate(), ConstructFunction),
          RelocInfo::CODE_TARGET);

  // Only dispatch to bound functions after checking whether they are
  // constructors.
  __ bind(&non_jsfunction);
  __ CmpInstanceType(ecx, JS_BOUND_FUNCTION_TYPE);
  __ j(not_equal, &non_jsboundfunction);
  __ Jump(BUILTIN_CODE(masm->isolate(), ConstructBoundFunction),
          RelocInfo::CODE_TARGET);

  // Only dispatch to proxies after checking whether they are constructors.
  __ bind(&non_jsboundfunction);
  __ CmpInstanceType(ecx, JS_PROXY_TYPE);
  __ j(not_equal, &non_proxy);
  __ Jump(BUILTIN_CODE(masm->isolate(), ConstructProxy),
          RelocInfo::CODE_TARGET);

  // Called Construct on an exotic Object with a [[Construct]] internal method.
  __ bind(&non_proxy);
  {
    // Overwrite the original receiver with the (original) target.
    __ mov(args.GetReceiverOperand(), edi);
    // Let the "call_as_constructor_delegate" take care of the rest.
    __ LoadNativeContextSlot(edi, Context::CALL_AS_CONSTRUCTOR_DELEGATE_INDEX);
    __ 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(BUILTIN_CODE(masm->isolate(), ConstructedNonConstructable),
          RelocInfo::CODE_TARGET);
}

void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- eax : actual number of arguments
  //  -- ecx : expected number of arguments
  //  -- edx : new target (passed through to callee)
  //  -- edi : function (passed through to callee)
  // -----------------------------------

  const Register kExpectedNumberOfArgumentsRegister = ecx;

  Label invoke, dont_adapt_arguments, stack_overflow, enough, too_few;
  __ cmp(kExpectedNumberOfArgumentsRegister, kDontAdaptArgumentsSentinel);
  __ j(equal, &dont_adapt_arguments);
  __ cmp(eax, kExpectedNumberOfArgumentsRegister);
  __ j(less, &too_few);

  {  // Enough parameters: Actual >= expected.
    __ bind(&enough);
    EnterArgumentsAdaptorFrame(masm);
    // edi is used as a scratch register. It should be restored from the frame
    // when needed.
    __ StackOverflowCheck(kExpectedNumberOfArgumentsRegister, edi,
                          &stack_overflow);

    // Copy receiver and all expected arguments.
    const int offset = StandardFrameConstants::kCallerSPOffset;
    __ lea(edi, Operand(ebp, ecx, times_system_pointer_size, offset));
    __ mov(eax, -1);  // account for receiver

    Label copy;
    __ bind(&copy);
    __ inc(eax);
    __ push(Operand(edi, 0));
    __ sub(edi, Immediate(kSystemPointerSize));
    __ cmp(eax, kExpectedNumberOfArgumentsRegister);
    __ j(less, &copy);
    // eax now contains the expected number of arguments.
    __ jmp(&invoke);
  }

  {  // Too few parameters: Actual < expected.
    __ bind(&too_few);
    EnterArgumentsAdaptorFrame(masm);
    // edi is used as a scratch register. It should be restored from the frame
    // when needed.
    __ StackOverflowCheck(kExpectedNumberOfArgumentsRegister, edi,
                          &stack_overflow);

    // Remember expected arguments in xmm0.
    __ movd(xmm0, kExpectedNumberOfArgumentsRegister);

    // Remember new target.
    __ movd(xmm1, edx);

    // Fill remaining expected arguments with undefined values.
    Label fill;
    __ mov(edx, ecx);
    __ sub(edx, eax);
    __ bind(&fill);
    __ Push(Immediate(masm->isolate()->factory()->undefined_value()));
    __ dec(edx);
    __ j(greater, &fill);

    // Copy receiver and all actual arguments.
    const int offset = StandardFrameConstants::kCallerSPOffset;
    __ lea(edi, Operand(ebp, eax, times_system_pointer_size, offset));
    __ mov(edx, Immediate(-1));

    Label copy;
    __ bind(&copy);
    __ inc(edx);
    __ push(Operand(edi, 0));
    __ sub(edi, Immediate(kSystemPointerSize));
    __ cmp(edx, eax);
    __ j(less, &copy);

    // Restore new.target
    __ movd(edx, xmm1);

    // Restore expected arguments.
    __ movd(eax, xmm0);
  }

  // Call the entry point.
  __ bind(&invoke);
  // Restore function pointer.
  __ mov(edi, Operand(ebp, ArgumentsAdaptorFrameConstants::kFunctionOffset));
  // eax : expected number of arguments
  // edx : new target (passed through to callee)
  // edi : function (passed through to callee)
  static_assert(kJavaScriptCallCodeStartRegister == ecx, "ABI mismatch");
  __ mov(ecx, FieldOperand(edi, JSFunction::kCodeOffset));
  __ CallCodeObject(ecx);

  // Store offset of return address for deoptimizer.
  masm->isolate()->heap()->SetArgumentsAdaptorDeoptPCOffset(masm->pc_offset());

  // Leave frame and return.
  LeaveArgumentsAdaptorFrame(masm);
  __ ret(0);

  // -------------------------------------------
  // Dont adapt arguments.
  // -------------------------------------------
  __ bind(&dont_adapt_arguments);
  static_assert(kJavaScriptCallCodeStartRegister == ecx, "ABI mismatch");
  __ mov(ecx, FieldOperand(edi, JSFunction::kCodeOffset));
  __ JumpCodeObject(ecx);

  __ bind(&stack_overflow);
  {
    FrameScope frame(masm, StackFrame::MANUAL);
    __ CallRuntime(Runtime::kThrowStackOverflow);
    __ int3();
  }
}

void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) {
  {
    FrameScope scope(masm, StackFrame::INTERNAL);
    __ CallRuntime(Runtime::kCompileForOnStackReplacement);
  }

  Label skip;
  // If the code object is null, just return to the caller.
  __ cmp(eax, Immediate(0));
  __ j(not_equal, &skip, Label::kNear);
  __ ret(0);

  __ bind(&skip);

  // Drop the handler frame that is be sitting on top of the actual
  // JavaScript frame. This is the case then OSR is triggered from bytecode.
  __ leave();

  // Load deoptimization data from the code object.
  __ mov(ecx, Operand(eax, Code::kDeoptimizationDataOffset - kHeapObjectTag));

  // Load the OSR entrypoint offset from the deoptimization data.
  __ mov(ecx, Operand(ecx, FixedArray::OffsetOfElementAt(
                               DeoptimizationData::kOsrPcOffsetIndex) -
                               kHeapObjectTag));
  __ SmiUntag(ecx);

  // Compute the target address = code_obj + header_size + osr_offset
  __ lea(eax, Operand(eax, ecx, times_1, Code::kHeaderSize - kHeapObjectTag));

  // Overwrite the return address on the stack.
  __ mov(Operand(esp, 0), eax);

  // And "return" to the OSR entry point of the function.
  __ ret(0);
}

void Builtins::Generate_WasmCompileLazy(MacroAssembler* masm) {
  // The function index was put in edi by the jump table trampoline.
  // Convert to Smi for the runtime call.
  __ SmiTag(kWasmCompileLazyFuncIndexRegister);
  {
    HardAbortScope hard_abort(masm);  // Avoid calls to Abort.
    FrameScope scope(masm, StackFrame::WASM_COMPILE_LAZY);

    // Save all parameter registers (see wasm-linkage.cc). They might be
    // overwritten in the runtime call below. We don't have any callee-saved
    // registers in wasm, so no need to store anything else.
    static_assert(WasmCompileLazyFrameConstants::kNumberOfSavedGpParamRegs ==
                      arraysize(wasm::kGpParamRegisters),
                  "frame size mismatch");
    for (Register reg : wasm::kGpParamRegisters) {
      __ Push(reg);
    }
    static_assert(WasmCompileLazyFrameConstants::kNumberOfSavedFpParamRegs ==
                      arraysize(wasm::kFpParamRegisters),
                  "frame size mismatch");
    __ AllocateStackSpace(kSimd128Size * arraysize(wasm::kFpParamRegisters));
    int offset = 0;
    for (DoubleRegister reg : wasm::kFpParamRegisters) {
      __ movdqu(Operand(esp, offset), reg);
      offset += kSimd128Size;
    }

    // Push the Wasm instance as an explicit argument to WasmCompileLazy.
    __ Push(kWasmInstanceRegister);
    // Push the function index as second argument.
    __ Push(kWasmCompileLazyFuncIndexRegister);
    // Initialize the JavaScript context with 0. CEntry will use it to
    // set the current context on the isolate.
    __ Move(kContextRegister, Smi::zero());
    {
      // At this point, ebx has been spilled to the stack but is not yet
      // overwritten with another value. We can still use it as kRootRegister.
      __ CallRuntime(Runtime::kWasmCompileLazy, 2);
    }
    // The entrypoint address is the return value.
    __ mov(edi, kReturnRegister0);

    // Restore registers.
    for (DoubleRegister reg : base::Reversed(wasm::kFpParamRegisters)) {
      offset -= kSimd128Size;
      __ movdqu(reg, Operand(esp, offset));
    }
    DCHECK_EQ(0, offset);
    __ add(esp, Immediate(kSimd128Size * arraysize(wasm::kFpParamRegisters)));
    for (Register reg : base::Reversed(wasm::kGpParamRegisters)) {
      __ Pop(reg);
    }
  }
  // Finally, jump to the entrypoint.
  __ jmp(edi);
}

void Builtins::Generate_WasmDebugBreak(MacroAssembler* masm) {
  HardAbortScope hard_abort(masm);  // Avoid calls to Abort.
  {
    FrameScope scope(masm, StackFrame::WASM_DEBUG_BREAK);

    // Save all parameter registers. They might hold live values, we restore
    // them after the runtime call.
    for (int reg_code : base::bits::IterateBitsBackwards(
             WasmDebugBreakFrameConstants::kPushedGpRegs)) {
      __ Push(Register::from_code(reg_code));
    }

    constexpr int kFpStackSize =
        kSimd128Size * WasmDebugBreakFrameConstants::kNumPushedFpRegisters;
    __ AllocateStackSpace(kFpStackSize);
    int offset = kFpStackSize;
    for (int reg_code : base::bits::IterateBitsBackwards(
             WasmDebugBreakFrameConstants::kPushedFpRegs)) {
      offset -= kSimd128Size;
      __ movdqu(Operand(esp, offset), DoubleRegister::from_code(reg_code));
    }

    // Initialize the JavaScript context with 0. CEntry will use it to
    // set the current context on the isolate.
    __ Move(kContextRegister, Smi::zero());
    __ CallRuntime(Runtime::kWasmDebugBreak, 0);

    // Restore registers.
    for (int reg_code :
         base::bits::IterateBits(WasmDebugBreakFrameConstants::kPushedFpRegs)) {
      __ movdqu(DoubleRegister::from_code(reg_code), Operand(esp, offset));
      offset += kSimd128Size;
    }
    __ add(esp, Immediate(kFpStackSize));
    for (int reg_code :
         base::bits::IterateBits(WasmDebugBreakFrameConstants::kPushedGpRegs)) {
      __ Pop(Register::from_code(reg_code));
    }
  }

  __ ret(0);
}

void Builtins::Generate_CEntry(MacroAssembler* masm, int result_size,
                               SaveFPRegsMode save_doubles, ArgvMode argv_mode,
                               bool builtin_exit_frame) {
  // eax: number of arguments including receiver
  // edx: pointer to C function
  // ebp: frame pointer  (restored after C call)
  // esp: stack pointer  (restored after C call)
  // esi: current context (C callee-saved)
  // edi: JS function of the caller (C callee-saved)
  //
  // If argv_mode == kArgvInRegister:
  // ecx: pointer to the first argument

  STATIC_ASSERT(eax == kRuntimeCallArgCountRegister);
  STATIC_ASSERT(ecx == kRuntimeCallArgvRegister);
  STATIC_ASSERT(edx == kRuntimeCallFunctionRegister);
  STATIC_ASSERT(esi == kContextRegister);
  STATIC_ASSERT(edi == kJSFunctionRegister);

  DCHECK(!AreAliased(kRuntimeCallArgCountRegister, kRuntimeCallArgvRegister,
                     kRuntimeCallFunctionRegister, kContextRegister,
                     kJSFunctionRegister, kRootRegister));

  // Reserve space on the stack for the three arguments passed to the call. If
  // result size is greater than can be returned in registers, also reserve
  // space for the hidden argument for the result location, and space for the
  // result itself.
  int arg_stack_space = 3;

  // Enter the exit frame that transitions from JavaScript to C++.
  if (argv_mode == kArgvInRegister) {
    DCHECK(save_doubles == kDontSaveFPRegs);
    DCHECK(!builtin_exit_frame);
    __ EnterApiExitFrame(arg_stack_space, edi);

    // Move argc and argv into the correct registers.
    __ mov(esi, ecx);
    __ mov(edi, eax);
  } else {
    __ EnterExitFrame(
        arg_stack_space, save_doubles == kSaveFPRegs,
        builtin_exit_frame ? StackFrame::BUILTIN_EXIT : StackFrame::EXIT);
  }

  // edx: pointer to C function
  // ebp: frame pointer  (restored after C call)
  // esp: stack pointer  (restored after C call)
  // edi: number of arguments including receiver  (C callee-saved)
  // esi: pointer to the first argument (C callee-saved)

  // Result returned in eax, or eax+edx if result size is 2.

  // Check stack alignment.
  if (FLAG_debug_code) {
    __ CheckStackAlignment();
  }
  // Call C function.
  __ mov(Operand(esp, 0 * kSystemPointerSize), edi);  // argc.
  __ mov(Operand(esp, 1 * kSystemPointerSize), esi);  // argv.
  __ Move(ecx, Immediate(ExternalReference::isolate_address(masm->isolate())));
  __ mov(Operand(esp, 2 * kSystemPointerSize), ecx);
  __ call(kRuntimeCallFunctionRegister);

  // Result is in eax or edx:eax - do not destroy these registers!

  // Check result for exception sentinel.
  Label exception_returned;
  __ CompareRoot(eax, RootIndex::kException);
  __ j(equal, &exception_returned);

  // Check that there is no pending exception, otherwise we
  // should have returned the exception sentinel.
  if (FLAG_debug_code) {
    __ push(edx);
    __ LoadRoot(edx, RootIndex::kTheHoleValue);
    Label okay;
    ExternalReference pending_exception_address = ExternalReference::Create(
        IsolateAddressId::kPendingExceptionAddress, masm->isolate());
    __ cmp(edx, __ ExternalReferenceAsOperand(pending_exception_address, ecx));
    // Cannot use check here as it attempts to generate call into runtime.
    __ j(equal, &okay, Label::kNear);
    __ int3();
    __ bind(&okay);
    __ pop(edx);
  }

  // Exit the JavaScript to C++ exit frame.
  __ LeaveExitFrame(save_doubles == kSaveFPRegs, argv_mode == kArgvOnStack);
  __ ret(0);

  // Handling of exception.
  __ bind(&exception_returned);

  ExternalReference pending_handler_context_address = ExternalReference::Create(
      IsolateAddressId::kPendingHandlerContextAddress, masm->isolate());
  ExternalReference pending_handler_entrypoint_address =
      ExternalReference::Create(
          IsolateAddressId::kPendingHandlerEntrypointAddress, masm->isolate());
  ExternalReference pending_handler_fp_address = ExternalReference::Create(
      IsolateAddressId::kPendingHandlerFPAddress, masm->isolate());
  ExternalReference pending_handler_sp_address = ExternalReference::Create(
      IsolateAddressId::kPendingHandlerSPAddress, masm->isolate());

  // Ask the runtime for help to determine the handler. This will set eax to
  // contain the current pending exception, don't clobber it.
  ExternalReference find_handler =
      ExternalReference::Create(Runtime::kUnwindAndFindExceptionHandler);
  {
    FrameScope scope(masm, StackFrame::MANUAL);
    __ PrepareCallCFunction(3, eax);
    __ mov(Operand(esp, 0 * kSystemPointerSize), Immediate(0));  // argc.
    __ mov(Operand(esp, 1 * kSystemPointerSize), Immediate(0));  // argv.
    __ Move(esi,
            Immediate(ExternalReference::isolate_address(masm->isolate())));
    __ mov(Operand(esp, 2 * kSystemPointerSize), esi);
    __ CallCFunction(find_handler, 3);
  }

  // Retrieve the handler context, SP and FP.
  __ mov(esp, __ ExternalReferenceAsOperand(pending_handler_sp_address, esi));
  __ mov(ebp, __ ExternalReferenceAsOperand(pending_handler_fp_address, esi));
  __ mov(esi,
         __ ExternalReferenceAsOperand(pending_handler_context_address, esi));

  // If the handler is a JS frame, restore the context to the frame. Note that
  // the context will be set to (esi == 0) for non-JS frames.
  Label skip;
  __ test(esi, esi);
  __ j(zero, &skip, Label::kNear);
  __ mov(Operand(ebp, StandardFrameConstants::kContextOffset), esi);
  __ bind(&skip);

  // Compute the handler entry address and jump to it.
  __ mov(edi, __ ExternalReferenceAsOperand(pending_handler_entrypoint_address,
                                            edi));
  __ jmp(edi);
}

void Builtins::Generate_DoubleToI(MacroAssembler* masm) {
  Label check_negative, process_64_bits, done;

  // Account for return address and saved regs.
  const int kArgumentOffset = 4 * kSystemPointerSize;

  MemOperand mantissa_operand(MemOperand(esp, kArgumentOffset));
  MemOperand exponent_operand(
      MemOperand(esp, kArgumentOffset + kDoubleSize / 2));

  // The result is returned on the stack.
  MemOperand return_operand = mantissa_operand;

  Register scratch1 = ebx;

  // Since we must use ecx for shifts below, use some other register (eax)
  // to calculate the result.
  Register result_reg = eax;
  // Save ecx if it isn't the return register and therefore volatile, or if it
  // is the return register, then save the temp register we use in its stead for
  // the result.
  Register save_reg = eax;
  __ push(ecx);
  __ push(scratch1);
  __ push(save_reg);

  __ mov(scratch1, mantissa_operand);
  if (CpuFeatures::IsSupported(SSE3)) {
    CpuFeatureScope scope(masm, SSE3);
    // Load x87 register with heap number.
    __ fld_d(mantissa_operand);
  }
  __ mov(ecx, exponent_operand);

  __ and_(ecx, HeapNumber::kExponentMask);
  __ shr(ecx, HeapNumber::kExponentShift);
  __ lea(result_reg, MemOperand(ecx, -HeapNumber::kExponentBias));
  __ cmp(result_reg, Immediate(HeapNumber::kMantissaBits));
  __ j(below, &process_64_bits);

  // Result is entirely in lower 32-bits of mantissa
  int delta = HeapNumber::kExponentBias + Double::kPhysicalSignificandSize;
  if (CpuFeatures::IsSupported(SSE3)) {
    __ fstp(0);
  }
  __ sub(ecx, Immediate(delta));
  __ xor_(result_reg, result_reg);
  __ cmp(ecx, Immediate(31));
  __ j(above, &done);
  __ shl_cl(scratch1);
  __ jmp(&check_negative);

  __ bind(&process_64_bits);
  if (CpuFeatures::IsSupported(SSE3)) {
    CpuFeatureScope scope(masm, SSE3);
    // Reserve space for 64 bit answer.
    __ AllocateStackSpace(kDoubleSize);  // Nolint.
    // Do conversion, which cannot fail because we checked the exponent.
    __ fisttp_d(Operand(esp, 0));
    __ mov(result_reg, Operand(esp, 0));  // Load low word of answer as result
    __ add(esp, Immediate(kDoubleSize));
    __ jmp(&done);
  } else {
    // Result must be extracted from shifted 32-bit mantissa
    __ sub(ecx, Immediate(delta));
    __ neg(ecx);
    __ mov(result_reg, exponent_operand);
    __ and_(result_reg,
            Immediate(static_cast<uint32_t>(Double::kSignificandMask >> 32)));
    __ add(result_reg,
           Immediate(static_cast<uint32_t>(Double::kHiddenBit >> 32)));
    __ shrd_cl(scratch1, result_reg);
    __ shr_cl(result_reg);
    __ test(ecx, Immediate(32));
    __ cmov(not_equal, scratch1, result_reg);
  }

  // If the double was negative, negate the integer result.
  __ bind(&check_negative);
  __ mov(result_reg, scratch1);
  __ neg(result_reg);
  __ cmp(exponent_operand, Immediate(0));
  __ cmov(greater, result_reg, scratch1);

  // Restore registers
  __ bind(&done);
  __ mov(return_operand, result_reg);
  __ pop(save_reg);
  __ pop(scratch1);
  __ pop(ecx);
  __ ret(0);
}

void Builtins::Generate_GenericJSToWasmWrapper(MacroAssembler* masm) {
  // TODO(v8:10701): Implement for this platform.
  __ Trap();
}

namespace {

// Generates an Operand for saving parameters after PrepareCallApiFunction.
Operand ApiParameterOperand(int index) {
  return Operand(esp, index * kSystemPointerSize);
}

// Prepares stack to put arguments (aligns and so on). Reserves
// space for return value if needed (assumes the return value is a handle).
// Arguments must be stored in ApiParameterOperand(0), ApiParameterOperand(1)
// etc. Saves context (esi). If space was reserved for return value then
// stores the pointer to the reserved slot into esi.
void PrepareCallApiFunction(MacroAssembler* masm, int argc, Register scratch) {
  __ EnterApiExitFrame(argc, scratch);
  if (__ emit_debug_code()) {
    __ mov(esi, Immediate(bit_cast<int32_t>(kZapValue)));
  }
}

// Calls an API function.  Allocates HandleScope, extracts returned value
// from handle and propagates exceptions.  Clobbers esi, edi and
// caller-save registers.  Restores context.  On return removes
// stack_space * kSystemPointerSize (GCed).
void CallApiFunctionAndReturn(MacroAssembler* masm, Register function_address,
                              ExternalReference thunk_ref,
                              Operand thunk_last_arg, int stack_space,
                              Operand* stack_space_operand,
                              Operand return_value_operand) {
  Isolate* isolate = masm->isolate();

  ExternalReference next_address =
      ExternalReference::handle_scope_next_address(isolate);
  ExternalReference limit_address =
      ExternalReference::handle_scope_limit_address(isolate);
  ExternalReference level_address =
      ExternalReference::handle_scope_level_address(isolate);

  DCHECK(edx == function_address);
  // Allocate HandleScope in callee-save registers.
  __ add(__ ExternalReferenceAsOperand(level_address, esi), Immediate(1));
  __ mov(esi, __ ExternalReferenceAsOperand(next_address, esi));
  __ mov(edi, __ ExternalReferenceAsOperand(limit_address, edi));

  Label profiler_enabled, end_profiler_check;
  __ Move(eax, Immediate(ExternalReference::is_profiling_address(isolate)));
  __ cmpb(Operand(eax, 0), Immediate(0));
  __ j(not_zero, &profiler_enabled);
  __ Move(eax, Immediate(ExternalReference::address_of_runtime_stats_flag()));
  __ cmp(Operand(eax, 0), Immediate(0));
  __ j(not_zero, &profiler_enabled);
  {
    // Call the api function directly.
    __ mov(eax, function_address);
    __ jmp(&end_profiler_check);
  }
  __ bind(&profiler_enabled);
  {
    // Additional parameter is the address of the actual getter function.
    __ mov(thunk_last_arg, function_address);
    __ Move(eax, Immediate(thunk_ref));
  }
  __ bind(&end_profiler_check);

  // Call the api function.
  __ call(eax);

  Label prologue;
  // Load the value from ReturnValue
  __ mov(eax, return_value_operand);

  Label promote_scheduled_exception;
  Label delete_allocated_handles;
  Label leave_exit_frame;

  __ bind(&prologue);
  // No more valid handles (the result handle was the last one). Restore
  // previous handle scope.
  __ mov(__ ExternalReferenceAsOperand(next_address, ecx), esi);
  __ sub(__ ExternalReferenceAsOperand(level_address, ecx), Immediate(1));
  __ Assert(above_equal, AbortReason::kInvalidHandleScopeLevel);
  __ cmp(edi, __ ExternalReferenceAsOperand(limit_address, ecx));
  __ j(not_equal, &delete_allocated_handles);

  // Leave the API exit frame.
  __ bind(&leave_exit_frame);
  if (stack_space_operand != nullptr) {
    DCHECK_EQ(stack_space, 0);
    __ mov(edx, *stack_space_operand);
  }
  __ LeaveApiExitFrame();

  // Check if the function scheduled an exception.
  ExternalReference scheduled_exception_address =
      ExternalReference::scheduled_exception_address(isolate);
  __ mov(ecx, __ ExternalReferenceAsOperand(scheduled_exception_address, ecx));
  __ CompareRoot(ecx, RootIndex::kTheHoleValue);
  __ j(not_equal, &promote_scheduled_exception);

#if DEBUG
  // Check if the function returned a valid JavaScript value.
  Label ok;
  Register return_value = eax;
  Register map = ecx;

  __ JumpIfSmi(return_value, &ok, Label::kNear);
  __ mov(map, FieldOperand(return_value, HeapObject::kMapOffset));

  __ CmpInstanceType(map, LAST_NAME_TYPE);
  __ j(below_equal, &ok, Label::kNear);

  __ CmpInstanceType(map, FIRST_JS_RECEIVER_TYPE);
  __ j(above_equal, &ok, Label::kNear);

  __ CompareRoot(map, RootIndex::kHeapNumberMap);
  __ j(equal, &ok, Label::kNear);

  __ CompareRoot(map, RootIndex::kBigIntMap);
  __ j(equal, &ok, Label::kNear);

  __ CompareRoot(return_value, RootIndex::kUndefinedValue);
  __ j(equal, &ok, Label::kNear);

  __ CompareRoot(return_value, RootIndex::kTrueValue);
  __ j(equal, &ok, Label::kNear);

  __ CompareRoot(return_value, RootIndex::kFalseValue);
  __ j(equal, &ok, Label::kNear);

  __ CompareRoot(return_value, RootIndex::kNullValue);
  __ j(equal, &ok, Label::kNear);

  __ Abort(AbortReason::kAPICallReturnedInvalidObject);

  __ bind(&ok);
#endif

  if (stack_space_operand == nullptr) {
    DCHECK_NE(stack_space, 0);
    __ ret(stack_space * kSystemPointerSize);
  } else {
    DCHECK_EQ(0, stack_space);
    __ pop(ecx);
    __ add(esp, edx);
    __ jmp(ecx);
  }

  // Re-throw by promoting a scheduled exception.
  __ bind(&promote_scheduled_exception);
  __ TailCallRuntime(Runtime::kPromoteScheduledException);

  // HandleScope limit has changed. Delete allocated extensions.
  ExternalReference delete_extensions =
      ExternalReference::delete_handle_scope_extensions();
  __ bind(&delete_allocated_handles);
  __ mov(__ ExternalReferenceAsOperand(limit_address, ecx), edi);
  __ mov(edi, eax);
  __ Move(eax, Immediate(ExternalReference::isolate_address(isolate)));
  __ mov(Operand(esp, 0), eax);
  __ Move(eax, Immediate(delete_extensions));
  __ call(eax);
  __ mov(eax, edi);
  __ jmp(&leave_exit_frame);
}

}  // namespace

void Builtins::Generate_CallApiCallback(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- esi                 : context
  //  -- edx                 : api function address
  //  -- ecx                 : arguments count (not including the receiver)
  //  -- eax                 : call data
  //  -- edi                 : holder
  //  -- esp[0]              : return address
  //  -- esp[8]              : argument 0 (receiver)
  //  -- esp[16]             : argument 1
  //  -- ...
  //  -- esp[argc * 8]       : argument (argc - 1)
  //  -- esp[(argc + 1) * 8] : argument argc
  // -----------------------------------

  Register api_function_address = edx;
  Register argc = ecx;
  Register call_data = eax;
  Register holder = edi;

  // Park argc in xmm0.
  __ movd(xmm0, argc);

  DCHECK(!AreAliased(api_function_address, argc, holder));

  using FCA = FunctionCallbackArguments;

  STATIC_ASSERT(FCA::kArgsLength == 6);
  STATIC_ASSERT(FCA::kNewTargetIndex == 5);
  STATIC_ASSERT(FCA::kDataIndex == 4);
  STATIC_ASSERT(FCA::kReturnValueOffset == 3);
  STATIC_ASSERT(FCA::kReturnValueDefaultValueIndex == 2);
  STATIC_ASSERT(FCA::kIsolateIndex == 1);
  STATIC_ASSERT(FCA::kHolderIndex == 0);

  // Set up FunctionCallbackInfo's implicit_args on the stack as follows:
  //
  // Current state:
  //   esp[0]: return address
  //
  // Target state:
  //   esp[0 * kSystemPointerSize]: return address
  //   esp[1 * kSystemPointerSize]: kHolder
  //   esp[2 * kSystemPointerSize]: kIsolate
  //   esp[3 * kSystemPointerSize]: undefined (kReturnValueDefaultValue)
  //   esp[4 * kSystemPointerSize]: undefined (kReturnValue)
  //   esp[5 * kSystemPointerSize]: kData
  //   esp[6 * kSystemPointerSize]: undefined (kNewTarget)

  __ PopReturnAddressTo(ecx);
  __ PushRoot(RootIndex::kUndefinedValue);
  __ Push(call_data);
  __ PushRoot(RootIndex::kUndefinedValue);
  __ PushRoot(RootIndex::kUndefinedValue);
  __ Push(Immediate(ExternalReference::isolate_address(masm->isolate())));
  __ Push(holder);
  __ PushReturnAddressFrom(ecx);

  // Reload argc from xmm0.
  __ movd(argc, xmm0);

  // Keep a pointer to kHolder (= implicit_args) in a scratch register.
  // We use it below to set up the FunctionCallbackInfo object.
  Register scratch = eax;
  __ lea(scratch, Operand(esp, 1 * kSystemPointerSize));

  // The API function takes a reference to v8::Arguments. If the CPU profiler
  // is enabled, a wrapper function will be called and we need to pass
  // the address of the callback as an additional parameter. Always allocate
  // space for it.
  static constexpr int kApiArgc = 1 + 1;

  // Allocate the v8::Arguments structure in the arguments' space since
  // it's not controlled by GC.
  static constexpr int kApiStackSpace = 4;

  PrepareCallApiFunction(masm, kApiArgc + kApiStackSpace, edi);

  // FunctionCallbackInfo::implicit_args_ (points at kHolder as set up above).
  __ mov(ApiParameterOperand(kApiArgc + 0), scratch);

  // FunctionCallbackInfo::values_ (points at the first varargs argument passed
  // on the stack).
  __ lea(scratch,
         Operand(scratch, (FCA::kArgsLength + 1) * kSystemPointerSize));
  __ mov(ApiParameterOperand(kApiArgc + 1), scratch);

  // FunctionCallbackInfo::length_.
  __ mov(ApiParameterOperand(kApiArgc + 2), argc);

  // We also store the number of bytes to drop from the stack after returning
  // from the API function here.
  __ lea(scratch,
         Operand(argc, times_system_pointer_size,
                 (FCA::kArgsLength + 1 /* receiver */) * kSystemPointerSize));
  __ mov(ApiParameterOperand(kApiArgc + 3), scratch);

  // v8::InvocationCallback's argument.
  __ lea(scratch, ApiParameterOperand(kApiArgc + 0));
  __ mov(ApiParameterOperand(0), scratch);

  ExternalReference thunk_ref = ExternalReference::invoke_function_callback();

  // There are two stack slots above the arguments we constructed on the stack:
  // the stored ebp (pushed by EnterApiExitFrame), and the return address.
  static constexpr int kStackSlotsAboveFCA = 2;
  Operand return_value_operand(
      ebp,
      (kStackSlotsAboveFCA + FCA::kReturnValueOffset) * kSystemPointerSize);

  static constexpr int kUseStackSpaceOperand = 0;
  Operand stack_space_operand = ApiParameterOperand(kApiArgc + 3);
  CallApiFunctionAndReturn(masm, api_function_address, thunk_ref,
                           ApiParameterOperand(1), kUseStackSpaceOperand,
                           &stack_space_operand, return_value_operand);
}

void Builtins::Generate_CallApiGetter(MacroAssembler* masm) {
  // Build v8::PropertyCallbackInfo::args_ array on the stack and push property
  // name below the exit frame to make GC aware of them.
  STATIC_ASSERT(PropertyCallbackArguments::kShouldThrowOnErrorIndex == 0);
  STATIC_ASSERT(PropertyCallbackArguments::kHolderIndex == 1);
  STATIC_ASSERT(PropertyCallbackArguments::kIsolateIndex == 2);
  STATIC_ASSERT(PropertyCallbackArguments::kReturnValueDefaultValueIndex == 3);
  STATIC_ASSERT(PropertyCallbackArguments::kReturnValueOffset == 4);
  STATIC_ASSERT(PropertyCallbackArguments::kDataIndex == 5);
  STATIC_ASSERT(PropertyCallbackArguments::kThisIndex == 6);
  STATIC_ASSERT(PropertyCallbackArguments::kArgsLength == 7);

  Register receiver = ApiGetterDescriptor::ReceiverRegister();
  Register holder = ApiGetterDescriptor::HolderRegister();
  Register callback = ApiGetterDescriptor::CallbackRegister();
  Register scratch = edi;
  DCHECK(!AreAliased(receiver, holder, callback, scratch));

  __ pop(scratch);  // Pop return address to extend the frame.
  __ push(receiver);
  __ push(FieldOperand(callback, AccessorInfo::kDataOffset));
  __ PushRoot(RootIndex::kUndefinedValue);  // ReturnValue
  // ReturnValue default value
  __ PushRoot(RootIndex::kUndefinedValue);
  __ Push(Immediate(ExternalReference::isolate_address(masm->isolate())));
  __ push(holder);
  __ push(Immediate(Smi::zero()));  // should_throw_on_error -> false
  __ push(FieldOperand(callback, AccessorInfo::kNameOffset));
  __ push(scratch);  // Restore return address.

  // v8::PropertyCallbackInfo::args_ array and name handle.
  const int kStackUnwindSpace = PropertyCallbackArguments::kArgsLength + 1;

  // Allocate v8::PropertyCallbackInfo object, arguments for callback and
  // space for optional callback address parameter (in case CPU profiler is
  // active) in non-GCed stack space.
  const int kApiArgc = 3 + 1;

  PrepareCallApiFunction(masm, kApiArgc, scratch);

  // Load address of v8::PropertyAccessorInfo::args_ array. The value in ebp
  // here corresponds to esp + kSystemPointerSize before PrepareCallApiFunction.
  __ lea(scratch, Operand(ebp, kSystemPointerSize + 2 * kSystemPointerSize));
  // Create v8::PropertyCallbackInfo object on the stack and initialize
  // it's args_ field.
  Operand info_object = ApiParameterOperand(3);
  __ mov(info_object, scratch);

  // Name as handle.
  __ sub(scratch, Immediate(kSystemPointerSize));
  __ mov(ApiParameterOperand(0), scratch);
  // Arguments pointer.
  __ lea(scratch, info_object);
  __ mov(ApiParameterOperand(1), scratch);
  // Reserve space for optional callback address parameter.
  Operand thunk_last_arg = ApiParameterOperand(2);

  ExternalReference thunk_ref =
      ExternalReference::invoke_accessor_getter_callback();

  __ mov(scratch, FieldOperand(callback, AccessorInfo::kJsGetterOffset));
  Register function_address = edx;
  __ mov(function_address,
         FieldOperand(scratch, Foreign::kForeignAddressOffset));
  // +3 is to skip prolog, return address and name handle.
  Operand return_value_operand(
      ebp,
      (PropertyCallbackArguments::kReturnValueOffset + 3) * kSystemPointerSize);
  Operand* const kUseStackSpaceConstant = nullptr;
  CallApiFunctionAndReturn(masm, function_address, thunk_ref, thunk_last_arg,
                           kStackUnwindSpace, kUseStackSpaceConstant,
                           return_value_operand);
}

void Builtins::Generate_DirectCEntry(MacroAssembler* masm) {
  __ int3();  // Unused on this architecture.
}

namespace {

enum Direction { FORWARD, BACKWARD };
enum Alignment { MOVE_ALIGNED, MOVE_UNALIGNED };

// Expects registers:
// esi - source, aligned if alignment == ALIGNED
// edi - destination, always aligned
// ecx - count (copy size in bytes)
// edx - loop count (number of 64 byte chunks)
void MemMoveEmitMainLoop(MacroAssembler* masm, Label* move_last_15,
                         Direction direction, Alignment alignment) {
  Register src = esi;
  Register dst = edi;
  Register count = ecx;
  Register loop_count = edx;
  Label loop, move_last_31, move_last_63;
  __ cmp(loop_count, 0);
  __ j(equal, &move_last_63);
  __ bind(&loop);
  // Main loop. Copy in 64 byte chunks.
  if (direction == BACKWARD) __ sub(src, Immediate(0x40));
  __ movdq(alignment == MOVE_ALIGNED, xmm0, Operand(src, 0x00));
  __ movdq(alignment == MOVE_ALIGNED, xmm1, Operand(src, 0x10));
  __ movdq(alignment == MOVE_ALIGNED, xmm2, Operand(src, 0x20));
  __ movdq(alignment == MOVE_ALIGNED, xmm3, Operand(src, 0x30));
  if (direction == FORWARD) __ add(src, Immediate(0x40));
  if (direction == BACKWARD) __ sub(dst, Immediate(0x40));
  __ movdqa(Operand(dst, 0x00), xmm0);
  __ movdqa(Operand(dst, 0x10), xmm1);
  __ movdqa(Operand(dst, 0x20), xmm2);
  __ movdqa(Operand(dst, 0x30), xmm3);
  if (direction == FORWARD) __ add(dst, Immediate(0x40));
  __ dec(loop_count);
  __ j(not_zero, &loop);
  // At most 63 bytes left to copy.
  __ bind(&move_last_63);
  __ test(count, Immediate(0x20));
  __ j(zero, &move_last_31);
  if (direction == BACKWARD) __ sub(src, Immediate(0x20));
  __ movdq(alignment == MOVE_ALIGNED, xmm0, Operand(src, 0x00));
  __ movdq(alignment == MOVE_ALIGNED, xmm1, Operand(src, 0x10));
  if (direction == FORWARD) __ add(src, Immediate(0x20));
  if (direction == BACKWARD) __ sub(dst, Immediate(0x20));
  __ movdqa(Operand(dst, 0x00), xmm0);
  __ movdqa(Operand(dst, 0x10), xmm1);
  if (direction == FORWARD) __ add(dst, Immediate(0x20));
  // At most 31 bytes left to copy.
  __ bind(&move_last_31);
  __ test(count, Immediate(0x10));
  __ j(zero, move_last_15);
  if (direction == BACKWARD) __ sub(src, Immediate(0x10));
  __ movdq(alignment == MOVE_ALIGNED, xmm0, Operand(src, 0));
  if (direction == FORWARD) __ add(src, Immediate(0x10));
  if (direction == BACKWARD) __ sub(dst, Immediate(0x10));
  __ movdqa(Operand(dst, 0), xmm0);
  if (direction == FORWARD) __ add(dst, Immediate(0x10));
}

void MemMoveEmitPopAndReturn(MacroAssembler* masm) {
  __ pop(esi);
  __ pop(edi);
  __ ret(0);
}

}  // namespace

void Builtins::Generate_MemMove(MacroAssembler* masm) {
  // Generated code is put into a fixed, unmovable buffer, and not into
  // the V8 heap. We can't, and don't, refer to any relocatable addresses
  // (e.g. the JavaScript nan-object).

  // 32-bit C declaration function calls pass arguments on stack.

  // Stack layout:
  // esp[12]: Third argument, size.
  // esp[8]: Second argument, source pointer.
  // esp[4]: First argument, destination pointer.
  // esp[0]: return address

  const int kDestinationOffset = 1 * kSystemPointerSize;
  const int kSourceOffset = 2 * kSystemPointerSize;
  const int kSizeOffset = 3 * kSystemPointerSize;

  // When copying up to this many bytes, use special "small" handlers.
  const size_t kSmallCopySize = 8;
  // When copying up to this many bytes, use special "medium" handlers.
  const size_t kMediumCopySize = 63;
  // When non-overlapping region of src and dst is less than this,
  // use a more careful implementation (slightly slower).
  const size_t kMinMoveDistance = 16;
  // Note that these values are dictated by the implementation below,
  // do not just change them and hope things will work!

  int stack_offset = 0;  // Update if we change the stack height.

  Label backward, backward_much_overlap;
  Label forward_much_overlap, small_size, medium_size, pop_and_return;
  __ push(edi);
  __ push(esi);
  stack_offset += 2 * kSystemPointerSize;
  Register dst = edi;
  Register src = esi;
  Register count = ecx;
  Register loop_count = edx;
  __ mov(dst, Operand(esp, stack_offset + kDestinationOffset));
  __ mov(src, Operand(esp, stack_offset + kSourceOffset));
  __ mov(count, Operand(esp, stack_offset + kSizeOffset));

  __ cmp(dst, src);
  __ j(equal, &pop_and_return);

  __ prefetch(Operand(src, 0), 1);
  __ cmp(count, kSmallCopySize);
  __ j(below_equal, &small_size);
  __ cmp(count, kMediumCopySize);
  __ j(below_equal, &medium_size);
  __ cmp(dst, src);
  __ j(above, &backward);

  {
    // |dst| is a lower address than |src|. Copy front-to-back.
    Label unaligned_source, move_last_15, skip_last_move;
    __ mov(eax, src);
    __ sub(eax, dst);
    __ cmp(eax, kMinMoveDistance);
    __ j(below, &forward_much_overlap);
    // Copy first 16 bytes.
    __ movdqu(xmm0, Operand(src, 0));
    __ movdqu(Operand(dst, 0), xmm0);
    // Determine distance to alignment: 16 - (dst & 0xF).
    __ mov(edx, dst);
    __ and_(edx, 0xF);
    __ neg(edx);
    __ add(edx, Immediate(16));
    __ add(dst, edx);
    __ add(src, edx);
    __ sub(count, edx);
    // dst is now aligned. Main copy loop.
    __ mov(loop_count, count);
    __ shr(loop_count, 6);
    // Check if src is also aligned.
    __ test(src, Immediate(0xF));
    __ j(not_zero, &unaligned_source);
    // Copy loop for aligned source and destination.
    MemMoveEmitMainLoop(masm, &move_last_15, FORWARD, MOVE_ALIGNED);
    // At most 15 bytes to copy. Copy 16 bytes at end of string.
    __ bind(&move_last_15);
    __ and_(count, 0xF);
    __ j(zero, &skip_last_move, Label::kNear);
    __ movdqu(xmm0, Operand(src, count, times_1, -0x10));
    __ movdqu(Operand(dst, count, times_1, -0x10), xmm0);
    __ bind(&skip_last_move);
    MemMoveEmitPopAndReturn(masm);

    // Copy loop for unaligned source and aligned destination.
    __ bind(&unaligned_source);
    MemMoveEmitMainLoop(masm, &move_last_15, FORWARD, MOVE_UNALIGNED);
    __ jmp(&move_last_15);

    // Less than kMinMoveDistance offset between dst and src.
    Label loop_until_aligned, last_15_much_overlap;
    __ bind(&loop_until_aligned);
    __ mov_b(eax, Operand(src, 0));
    __ inc(src);
    __ mov_b(Operand(dst, 0), eax);
    __ inc(dst);
    __ dec(count);
    __ bind(&forward_much_overlap);  // Entry point into this block.
    __ test(dst, Immediate(0xF));
    __ j(not_zero, &loop_until_aligned);
    // dst is now aligned, src can't be. Main copy loop.
    __ mov(loop_count, count);
    __ shr(loop_count, 6);
    MemMoveEmitMainLoop(masm, &last_15_much_overlap, FORWARD, MOVE_UNALIGNED);
    __ bind(&last_15_much_overlap);
    __ and_(count, 0xF);
    __ j(zero, &pop_and_return);
    __ cmp(count, kSmallCopySize);
    __ j(below_equal, &small_size);
    __ jmp(&medium_size);
  }

  {
    // |dst| is a higher address than |src|. Copy backwards.
    Label unaligned_source, move_first_15, skip_last_move;
    __ bind(&backward);
    // |dst| and |src| always point to the end of what's left to copy.
    __ add(dst, count);
    __ add(src, count);
    __ mov(eax, dst);
    __ sub(eax, src);
    __ cmp(eax, kMinMoveDistance);
    __ j(below, &backward_much_overlap);
    // Copy last 16 bytes.
    __ movdqu(xmm0, Operand(src, -0x10));
    __ movdqu(Operand(dst, -0x10), xmm0);
    // Find distance to alignment: dst & 0xF
    __ mov(edx, dst);
    __ and_(edx, 0xF);
    __ sub(dst, edx);
    __ sub(src, edx);
    __ sub(count, edx);
    // dst is now aligned. Main copy loop.
    __ mov(loop_count, count);
    __ shr(loop_count, 6);
    // Check if src is also aligned.
    __ test(src, Immediate(0xF));
    __ j(not_zero, &unaligned_source);
    // Copy loop for aligned source and destination.
    MemMoveEmitMainLoop(masm, &move_first_15, BACKWARD, MOVE_ALIGNED);
    // At most 15 bytes to copy. Copy 16 bytes at beginning of string.
    __ bind(&move_first_15);
    __ and_(count, 0xF);
    __ j(zero, &skip_last_move, Label::kNear);
    __ sub(src, count);
    __ sub(dst, count);
    __ movdqu(xmm0, Operand(src, 0));
    __ movdqu(Operand(dst, 0), xmm0);
    __ bind(&skip_last_move);
    MemMoveEmitPopAndReturn(masm);

    // Copy loop for unaligned source and aligned destination.
    __ bind(&unaligned_source);
    MemMoveEmitMainLoop(masm, &move_first_15, BACKWARD, MOVE_UNALIGNED);
    __ jmp(&move_first_15);

    // Less than kMinMoveDistance offset between dst and src.
    Label loop_until_aligned, first_15_much_overlap;
    __ bind(&loop_until_aligned);
    __ dec(src);
    __ dec(dst);
    __ mov_b(eax, Operand(src, 0));
    __ mov_b(Operand(dst, 0), eax);
    __ dec(count);
    __ bind(&backward_much_overlap);  // Entry point into this block.
    __ test(dst, Immediate(0xF));
    __ j(not_zero, &loop_until_aligned);
    // dst is now aligned, src can't be. Main copy loop.
    __ mov(loop_count, count);
    __ shr(loop_count, 6);
    MemMoveEmitMainLoop(masm, &first_15_much_overlap, BACKWARD, MOVE_UNALIGNED);
    __ bind(&first_15_much_overlap);
    __ and_(count, 0xF);
    __ j(zero, &pop_and_return);
    // Small/medium handlers expect dst/src to point to the beginning.
    __ sub(dst, count);
    __ sub(src, count);
    __ cmp(count, kSmallCopySize);
    __ j(below_equal, &small_size);
    __ jmp(&medium_size);
  }
  {
    // Special handlers for 9 <= copy_size < 64. No assumptions about
    // alignment or move distance, so all reads must be unaligned and
    // must happen before any writes.
    Label f9_16, f17_32, f33_48, f49_63;

    __ bind(&f9_16);
    __ movsd(xmm0, Operand(src, 0));
    __ movsd(xmm1, Operand(src, count, times_1, -8));
    __ movsd(Operand(dst, 0), xmm0);
    __ movsd(Operand(dst, count, times_1, -8), xmm1);
    MemMoveEmitPopAndReturn(masm);

    __ bind(&f17_32);
    __ movdqu(xmm0, Operand(src, 0));
    __ movdqu(xmm1, Operand(src, count, times_1, -0x10));
    __ movdqu(Operand(dst, 0x00), xmm0);
    __ movdqu(Operand(dst, count, times_1, -0x10), xmm1);
    MemMoveEmitPopAndReturn(masm);

    __ bind(&f33_48);
    __ movdqu(xmm0, Operand(src, 0x00));
    __ movdqu(xmm1, Operand(src, 0x10));
    __ movdqu(xmm2, Operand(src, count, times_1, -0x10));
    __ movdqu(Operand(dst, 0x00), xmm0);
    __ movdqu(Operand(dst, 0x10), xmm1);
    __ movdqu(Operand(dst, count, times_1, -0x10), xmm2);
    MemMoveEmitPopAndReturn(masm);

    __ bind(&f49_63);
    __ movdqu(xmm0, Operand(src, 0x00));
    __ movdqu(xmm1, Operand(src, 0x10));
    __ movdqu(xmm2, Operand(src, 0x20));
    __ movdqu(xmm3, Operand(src, count, times_1, -0x10));
    __ movdqu(Operand(dst, 0x00), xmm0);
    __ movdqu(Operand(dst, 0x10), xmm1);
    __ movdqu(Operand(dst, 0x20), xmm2);
    __ movdqu(Operand(dst, count, times_1, -0x10), xmm3);
    MemMoveEmitPopAndReturn(masm);

    __ bind(&medium_size);  // Entry point into this block.
    __ mov(eax, count);
    __ dec(eax);
    __ shr(eax, 4);
    if (FLAG_debug_code) {
      Label ok;
      __ cmp(eax, 3);
      __ j(below_equal, &ok);
      __ int3();
      __ bind(&ok);
    }

    // Dispatch to handlers.
    Label eax_is_2_or_3;

    __ cmp(eax, 1);
    __ j(greater, &eax_is_2_or_3);
    __ j(less, &f9_16);  // eax == 0.
    __ jmp(&f17_32);     // eax == 1.

    __ bind(&eax_is_2_or_3);
    __ cmp(eax, 3);
    __ j(less, &f33_48);  // eax == 2.
    __ jmp(&f49_63);      // eax == 3.
  }
  {
    // Specialized copiers for copy_size <= 8 bytes.
    Label f0, f1, f2, f3, f4, f5_8;
    __ bind(&f0);
    MemMoveEmitPopAndReturn(masm);

    __ bind(&f1);
    __ mov_b(eax, Operand(src, 0));
    __ mov_b(Operand(dst, 0), eax);
    MemMoveEmitPopAndReturn(masm);

    __ bind(&f2);
    __ mov_w(eax, Operand(src, 0));
    __ mov_w(Operand(dst, 0), eax);
    MemMoveEmitPopAndReturn(masm);

    __ bind(&f3);
    __ mov_w(eax, Operand(src, 0));
    __ mov_b(edx, Operand(src, 2));
    __ mov_w(Operand(dst, 0), eax);
    __ mov_b(Operand(dst, 2), edx);
    MemMoveEmitPopAndReturn(masm);

    __ bind(&f4);
    __ mov(eax, Operand(src, 0));
    __ mov(Operand(dst, 0), eax);
    MemMoveEmitPopAndReturn(masm);

    __ bind(&f5_8);
    __ mov(eax, Operand(src, 0));
    __ mov(edx, Operand(src, count, times_1, -4));
    __ mov(Operand(dst, 0), eax);
    __ mov(Operand(dst, count, times_1, -4), edx);
    MemMoveEmitPopAndReturn(masm);

    __ bind(&small_size);  // Entry point into this block.
    if (FLAG_debug_code) {
      Label ok;
      __ cmp(count, 8);
      __ j(below_equal, &ok);
      __ int3();
      __ bind(&ok);
    }

    // Dispatch to handlers.
    Label count_is_above_3, count_is_2_or_3;

    __ cmp(count, 3);
    __ j(greater, &count_is_above_3);

    __ cmp(count, 1);
    __ j(greater, &count_is_2_or_3);
    __ j(less, &f0);  // count == 0.
    __ jmp(&f1);      // count == 1.

    __ bind(&count_is_2_or_3);
    __ cmp(count, 3);
    __ j(less, &f2);  // count == 2.
    __ jmp(&f3);      // count == 3.

    __ bind(&count_is_above_3);
    __ cmp(count, 5);
    __ j(less, &f4);  // count == 4.
    __ jmp(&f5_8);    // count in [5, 8[.
  }

  __ bind(&pop_and_return);
  MemMoveEmitPopAndReturn(masm);
}

namespace {

void Generate_DeoptimizationEntry(MacroAssembler* masm,
                                  DeoptimizeKind deopt_kind) {
  Isolate* isolate = masm->isolate();

  // Save all general purpose registers before messing with them.
  const int kNumberOfRegisters = Register::kNumRegisters;

  const int kDoubleRegsSize = kDoubleSize * XMMRegister::kNumRegisters;
  __ AllocateStackSpace(kDoubleRegsSize);
  const RegisterConfiguration* config = RegisterConfiguration::Default();
  for (int i = 0; i < config->num_allocatable_double_registers(); ++i) {
    int code = config->GetAllocatableDoubleCode(i);
    XMMRegister xmm_reg = XMMRegister::from_code(code);
    int offset = code * kDoubleSize;
    __ movsd(Operand(esp, offset), xmm_reg);
  }

  __ pushad();

  ExternalReference c_entry_fp_address =
      ExternalReference::Create(IsolateAddressId::kCEntryFPAddress, isolate);
  __ mov(masm->ExternalReferenceAsOperand(c_entry_fp_address, esi), ebp);

  const int kSavedRegistersAreaSize =
      kNumberOfRegisters * kSystemPointerSize + kDoubleRegsSize;

  // Get the address of the location in the code object
  // and compute the fp-to-sp delta in register edx.
  __ mov(ecx, Operand(esp, kSavedRegistersAreaSize));
  __ lea(edx, Operand(esp, kSavedRegistersAreaSize + 1 * kSystemPointerSize));

  __ sub(edx, ebp);
  __ neg(edx);

  // Allocate a new deoptimizer object.
  __ PrepareCallCFunction(6, eax);
  __ mov(eax, Immediate(0));
  Label context_check;
  __ mov(edi, Operand(ebp, CommonFrameConstants::kContextOrFrameTypeOffset));
  __ JumpIfSmi(edi, &context_check);
  __ mov(eax, Operand(ebp, StandardFrameConstants::kFunctionOffset));
  __ bind(&context_check);
  __ mov(Operand(esp, 0 * kSystemPointerSize), eax);  // Function.
  __ mov(Operand(esp, 1 * kSystemPointerSize),
         Immediate(static_cast<int>(deopt_kind)));
  __ mov(Operand(esp, 2 * kSystemPointerSize),
         Immediate(Deoptimizer::kFixedExitSizeMarker));  // Bailout id.
  __ mov(Operand(esp, 3 * kSystemPointerSize), ecx);     // Code address or 0.
  __ mov(Operand(esp, 4 * kSystemPointerSize), edx);     // Fp-to-sp delta.
  __ Move(Operand(esp, 5 * kSystemPointerSize),
          Immediate(ExternalReference::isolate_address(masm->isolate())));
  {
    AllowExternalCallThatCantCauseGC scope(masm);
    __ CallCFunction(ExternalReference::new_deoptimizer_function(), 6);
  }

  // Preserve deoptimizer object in register eax and get the input
  // frame descriptor pointer.
  __ mov(esi, Operand(eax, Deoptimizer::input_offset()));

  // Fill in the input registers.
  for (int i = kNumberOfRegisters - 1; i >= 0; i--) {
    int offset =
        (i * kSystemPointerSize) + FrameDescription::registers_offset();
    __ pop(Operand(esi, offset));
  }

  int double_regs_offset = FrameDescription::double_registers_offset();
  // Fill in the double input registers.
  for (int i = 0; i < config->num_allocatable_double_registers(); ++i) {
    int code = config->GetAllocatableDoubleCode(i);
    int dst_offset = code * kDoubleSize + double_regs_offset;
    int src_offset = code * kDoubleSize;
    __ movsd(xmm0, Operand(esp, src_offset));
    __ movsd(Operand(esi, dst_offset), xmm0);
  }

  // Clear FPU all exceptions.
  // TODO(ulan): Find out why the TOP register is not zero here in some cases,
  // and check that the generated code never deoptimizes with unbalanced stack.
  __ fnclex();

  // Mark the stack as not iterable for the CPU profiler which won't be able to
  // walk the stack without the return address.
  __ mov_b(__ ExternalReferenceAsOperand(
               ExternalReference::stack_is_iterable_address(isolate), edx),
           Immediate(0));

  // Remove the return address and the double registers.
  __ add(esp, Immediate(kDoubleRegsSize + 1 * kSystemPointerSize));

  // Compute a pointer to the unwinding limit in register ecx; that is
  // the first stack slot not part of the input frame.
  __ mov(ecx, Operand(esi, FrameDescription::frame_size_offset()));
  __ add(ecx, esp);

  // Unwind the stack down to - but not including - the unwinding
  // limit and copy the contents of the activation frame to the input
  // frame description.
  __ lea(edx, Operand(esi, FrameDescription::frame_content_offset()));
  Label pop_loop_header;
  __ jmp(&pop_loop_header);
  Label pop_loop;
  __ bind(&pop_loop);
  __ pop(Operand(edx, 0));
  __ add(edx, Immediate(sizeof(uint32_t)));
  __ bind(&pop_loop_header);
  __ cmp(ecx, esp);
  __ j(not_equal, &pop_loop);

  // Compute the output frame in the deoptimizer.
  __ push(eax);
  __ PrepareCallCFunction(1, esi);
  __ mov(Operand(esp, 0 * kSystemPointerSize), eax);
  {
    AllowExternalCallThatCantCauseGC scope(masm);
    __ CallCFunction(ExternalReference::compute_output_frames_function(), 1);
  }
  __ pop(eax);

  __ mov(esp, Operand(eax, Deoptimizer::caller_frame_top_offset()));

  // Replace the current (input) frame with the output frames.
  Label outer_push_loop, inner_push_loop, outer_loop_header, inner_loop_header;
  // Outer loop state: eax = current FrameDescription**, edx = one
  // past the last FrameDescription**.
  __ mov(edx, Operand(eax, Deoptimizer::output_count_offset()));
  __ mov(eax, Operand(eax, Deoptimizer::output_offset()));
  __ lea(edx, Operand(eax, edx, times_system_pointer_size, 0));
  __ jmp(&outer_loop_header);
  __ bind(&outer_push_loop);
  // Inner loop state: esi = current FrameDescription*, ecx = loop
  // index.
  __ mov(esi, Operand(eax, 0));
  __ mov(ecx, Operand(esi, FrameDescription::frame_size_offset()));
  __ jmp(&inner_loop_header);
  __ bind(&inner_push_loop);
  __ sub(ecx, Immediate(sizeof(uint32_t)));
  __ push(Operand(esi, ecx, times_1, FrameDescription::frame_content_offset()));
  __ bind(&inner_loop_header);
  __ test(ecx, ecx);
  __ j(not_zero, &inner_push_loop);
  __ add(eax, Immediate(kSystemPointerSize));
  __ bind(&outer_loop_header);
  __ cmp(eax, edx);
  __ j(below, &outer_push_loop);

  // In case of a failed STUB, we have to restore the XMM registers.
  for (int i = 0; i < config->num_allocatable_double_registers(); ++i) {
    int code = config->GetAllocatableDoubleCode(i);
    XMMRegister xmm_reg = XMMRegister::from_code(code);
    int src_offset = code * kDoubleSize + double_regs_offset;
    __ movsd(xmm_reg, Operand(esi, src_offset));
  }

  // Push pc and continuation from the last output frame.
  __ push(Operand(esi, FrameDescription::pc_offset()));
  __ push(Operand(esi, FrameDescription::continuation_offset()));

  // Push the registers from the last output frame.
  for (int i = 0; i < kNumberOfRegisters; i++) {
    int offset =
        (i * kSystemPointerSize) + FrameDescription::registers_offset();
    __ push(Operand(esi, offset));
  }

  __ mov_b(__ ExternalReferenceAsOperand(
               ExternalReference::stack_is_iterable_address(isolate), edx),
           Immediate(1));

  // Restore the registers from the stack.
  __ popad();

  __ InitializeRootRegister();

  // Return to the continuation point.
  __ ret(0);
}

}  // namespace

void Builtins::Generate_DeoptimizationEntry_Eager(MacroAssembler* masm) {
  Generate_DeoptimizationEntry(masm, DeoptimizeKind::kEager);
}

void Builtins::Generate_DeoptimizationEntry_Soft(MacroAssembler* masm) {
  Generate_DeoptimizationEntry(masm, DeoptimizeKind::kSoft);
}

void Builtins::Generate_DeoptimizationEntry_Bailout(MacroAssembler* masm) {
  Generate_DeoptimizationEntry(masm, DeoptimizeKind::kBailout);
}

void Builtins::Generate_DeoptimizationEntry_Lazy(MacroAssembler* masm) {
  Generate_DeoptimizationEntry(masm, DeoptimizeKind::kLazy);
}

#undef __

}  // namespace internal
}  // namespace v8

#endif  // V8_TARGET_ARCH_IA32