text: // 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/interface-descriptors.h"
  #include "src/macro-assembler.h"
  
  namespace v8 {
  namespace internal {
  
  const Register CallInterfaceDescriptor::ContextRegister() { return esi; }
  
  void CallInterfaceDescriptor::DefaultInitializePlatformSpecific(
      CallInterfaceDescriptorData* data, int register_parameter_count) {
    constexpr Register default_stub_registers[] = {eax, ecx, edx, edi};
    STATIC_ASSERT(arraysize(default_stub_registers) == kMaxBuiltinRegisterParams);
    CHECK_LE(static_cast<size_t>(register_parameter_count),
             arraysize(default_stub_registers));
    data->InitializePlatformSpecific(register_parameter_count,
                                     default_stub_registers);
  }
  
  void RecordWriteDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    static const Register default_stub_registers[] = {ecx, edx, esi, edi,
                                                      kReturnRegister0};
  
    data->RestrictAllocatableRegisters(default_stub_registers,
                                       arraysize(default_stub_registers));
  
    CHECK_LE(static_cast<size_t>(kParameterCount),
             arraysize(default_stub_registers));
    data->InitializePlatformSpecific(kParameterCount, default_stub_registers);
  }
  
  const Register FastNewFunctionContextDescriptor::ScopeInfoRegister() {
    return edi;
  }
  const Register FastNewFunctionContextDescriptor::SlotsRegister() { return eax; }
  
  const Register LoadDescriptor::ReceiverRegister() { return edx; }
  const Register LoadDescriptor::NameRegister() { return ecx; }
  const Register LoadDescriptor::SlotRegister() { return eax; }
  
  const Register LoadWithVectorDescriptor::VectorRegister() { return no_reg; }
  
  const Register StoreDescriptor::ReceiverRegister() { return edx; }
  const Register StoreDescriptor::NameRegister() { return ecx; }
  const Register StoreDescriptor::ValueRegister() { return no_reg; }
  const Register StoreDescriptor::SlotRegister() { return no_reg; }
  
  const Register StoreWithVectorDescriptor::VectorRegister() { return no_reg; }
  
  const Register StoreTransitionDescriptor::SlotRegister() { return no_reg; }
  const Register StoreTransitionDescriptor::VectorRegister() { return no_reg; }
  const Register StoreTransitionDescriptor::MapRegister() { return edi; }
  
  const Register ApiGetterDescriptor::HolderRegister() { return ecx; }
  const Register ApiGetterDescriptor::CallbackRegister() { return eax; }
  
  const Register GrowArrayElementsDescriptor::ObjectRegister() { return eax; }
  const Register GrowArrayElementsDescriptor::KeyRegister() { return ecx; }
  
  // static
  const Register TypeConversionDescriptor::ArgumentRegister() { return eax; }
  
  void TypeofDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {ecx};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void CallFunctionDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {edi};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void CallTrampolineDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // eax : number of arguments
    // edi : the target to call
    Register registers[] = {edi, eax};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void CallVarargsDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // eax : number of arguments (on the stack, not including receiver)
    // edi : the target to call
    // ecx : arguments list length (untagged)
    // On the stack : arguments list (FixedArray)
    Register registers[] = {edi, eax, ecx};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void CallForwardVarargsDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // eax : number of arguments
    // ecx : start index (to support rest parameters)
    // edi : the target to call
    Register registers[] = {edi, eax, ecx};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void CallWithSpreadDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // eax : number of arguments (on the stack, not including receiver)
    // edi : the target to call
    // ecx : the object to spread
    Register registers[] = {edi, eax, ecx};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void CallWithArrayLikeDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // edi : the target to call
    // edx : the arguments list
    Register registers[] = {edi, edx};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void ConstructVarargsDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // eax : number of arguments (on the stack, not including receiver)
    // edi : the target to call
    // edx : the new target
    // ecx : arguments list length (untagged)
    // On the stack : arguments list (FixedArray)
    Register registers[] = {edi, edx, eax, ecx};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void ConstructForwardVarargsDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // eax : number of arguments
    // edx : the new target
    // ecx : start index (to support rest parameters)
    // edi : the target to call
    Register registers[] = {edi, edx, eax, ecx};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void ConstructWithSpreadDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // eax : number of arguments (on the stack, not including receiver)
    // edi : the target to call
    // edx : the new target
    // ecx : the object to spread
    Register registers[] = {edi, edx, eax, ecx};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void ConstructWithArrayLikeDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // edi : the target to call
    // edx : the new target
    // ecx : the arguments list
    Register registers[] = {edi, edx, ecx};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void ConstructStubDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // eax : number of arguments
    // edx : the new target
    // edi : the target to call
    // ecx : allocation site or undefined
    // TODO(jgruber): Remove the unused allocation site parameter.
    Register registers[] = {edi, edx, eax, ecx};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void AbortDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {edx};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void AllocateHeapNumberDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // register state
    data->InitializePlatformSpecific(0, nullptr);
  }
  
  void CompareDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {edx, eax};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void BinaryOpDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {edx, eax};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void ArgumentsAdaptorDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {
        edi,  // JSFunction
        edx,  // the new target
        eax,  // actual number of arguments
        ecx,  // expected number of arguments
    };
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void ApiCallbackDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {
        JavaScriptFrame::context_register(),  // callee context
        eax,                                  // call_data
        ecx,                                  // holder
        edx,                                  // api_function_address
    };
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void InterpreterDispatchDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {
        kInterpreterAccumulatorRegister, kInterpreterBytecodeOffsetRegister,
        kInterpreterBytecodeArrayRegister, kInterpreterDispatchTableRegister};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void InterpreterPushArgsThenCallDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {
        eax,  // argument count (not including receiver)
        ecx,  // address of first argument
        edi   // the target callable to be call
    };
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void InterpreterPushArgsThenConstructDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {
        eax,  // argument count (not including receiver)
        ecx,  // address of first argument
    };
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void ResumeGeneratorDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {
        eax,  // the value to pass to the generator
        edx   // the JSGeneratorObject to resume
    };
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void FrameDropperTrampolineDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {
        eax,  // loaded new FP
    };
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  }  // namespace internal
  }  // namespace v8
  
  #endif  // V8_TARGET_ARCH_IA32
  