text: // Copyright 2015 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_S390
  
  #include "src/interface-descriptors.h"
  #include "src/macro-assembler.h"
  
  namespace v8 {
  namespace internal {
  
  const Register CallInterfaceDescriptor::ContextRegister() { return cp; }
  
  void CallInterfaceDescriptor::DefaultInitializePlatformSpecific(
      CallInterfaceDescriptorData* data, int register_parameter_count) {
    const Register default_stub_registers[] = {r2, r3, r4, r5, r6};
    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) {
    const Register default_stub_registers[] = {r2, r3, r4, r5, r6};
  
    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 r3;
  }
  const Register FastNewFunctionContextDescriptor::SlotsRegister() { return r2; }
  
  const Register LoadDescriptor::ReceiverRegister() { return r3; }
  const Register LoadDescriptor::NameRegister() { return r4; }
  const Register LoadDescriptor::SlotRegister() { return r2; }
  
  const Register LoadWithVectorDescriptor::VectorRegister() { return r5; }
  
  const Register StoreDescriptor::ReceiverRegister() { return r3; }
  const Register StoreDescriptor::NameRegister() { return r4; }
  const Register StoreDescriptor::ValueRegister() { return r2; }
  const Register StoreDescriptor::SlotRegister() { return r6; }
  
  const Register StoreWithVectorDescriptor::VectorRegister() { return r5; }
  
  const Register StoreTransitionDescriptor::SlotRegister() { return r6; }
  const Register StoreTransitionDescriptor::VectorRegister() { return r5; }
  const Register StoreTransitionDescriptor::MapRegister() { return r7; }
  
  const Register ApiGetterDescriptor::HolderRegister() { return r2; }
  const Register ApiGetterDescriptor::CallbackRegister() { return r5; }
  
  const Register GrowArrayElementsDescriptor::ObjectRegister() { return r2; }
  const Register GrowArrayElementsDescriptor::KeyRegister() { return r5; }
  
  // static
  const Register TypeConversionDescriptor::ArgumentRegister() { return r2; }
  
  void TypeofDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {r5};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void CallTrampolineDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // r2 : number of arguments
    // r3 : the target to call
    Register registers[] = {r3, r2};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void CallVarargsDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // r2 : number of arguments (on the stack, not including receiver)
    // r3 : the target to call
    // r6 : arguments list length (untagged)
    // r4 : arguments list (FixedArray)
    Register registers[] = {r3, r2, r6, r4};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void CallForwardVarargsDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // r2 : number of arguments
    // r4 : start index (to support rest parameters)
    // r3 : the target to call
    Register registers[] = {r3, r2, r4};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void CallWithSpreadDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // r2 : number of arguments (on the stack, not including receiver)
    // r3 : the target to call
    // r4 : the object to spread
    Register registers[] = {r3, r2, r4};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void CallWithArrayLikeDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // r3 : the target to call
    // r4 : the arguments list
    Register registers[] = {r3, r4};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void ConstructVarargsDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // r2 : number of arguments (on the stack, not including receiver)
    // r3 : the target to call
    // r5 : the new target
    // r6 : arguments list length (untagged)
    // r4 : arguments list (FixedArray)
    Register registers[] = {r3, r5, r2, r6, r4};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void ConstructForwardVarargsDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // r2 : number of arguments
    // r5 : the new target
    // r4 : start index (to support rest parameters)
    // r3 : the target to call
    Register registers[] = {r3, r5, r2, r4};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void ConstructWithSpreadDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // r2 : number of arguments (on the stack, not including receiver)
    // r3 : the target to call
    // r5 : the new target
    // r4 : the object to spread
    Register registers[] = {r3, r5, r2, r4};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void ConstructWithArrayLikeDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // r3 : the target to call
    // r5 : the new target
    // r4 : the arguments list
    Register registers[] = {r3, r5, r4};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void ConstructStubDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    // r2 : number of arguments
    // r3 : the target to call
    // r5 : the new target
    // r4 : allocation site or undefined
    Register registers[] = {r3, r5, r2, r4};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void AbortDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {r3};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void AllocateHeapNumberDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    data->InitializePlatformSpecific(0, nullptr);
  }
  
  void CompareDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {r3, r2};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void BinaryOpDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {r3, r2};
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void ArgumentsAdaptorDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {
        r3,  // JSFunction
        r5,  // the new target
        r2,  // actual number of arguments
        r4,  // expected number of arguments
    };
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void ApiCallbackDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {
        JavaScriptFrame::context_register(),  // kTargetContext
        r3,                                   // kApiFunctionAddress
        r4,                                   // kArgc
    };
    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[] = {
        r2,  // argument count (not including receiver)
        r4,  // address of first argument
        r3   // the target callable to be call
    };
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void InterpreterPushArgsThenConstructDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {
        r2,  // argument count (not including receiver)
        r6,  // address of the first argument
        r3,  // constructor to call
        r5,  // new target
        r4,  // allocation site feedback if available, undefined otherwise
    };
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void ResumeGeneratorDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {
        r2,  // the value to pass to the generator
        r3   // the JSGeneratorObject to resume
    };
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  void FrameDropperTrampolineDescriptor::InitializePlatformSpecific(
      CallInterfaceDescriptorData* data) {
    Register registers[] = {
        r3,  // loaded new FP
    };
    data->InitializePlatformSpecific(arraysize(registers), registers);
  }
  
  }  // namespace internal
  }  // namespace v8
  
  #endif  // V8_TARGET_ARCH_S390
  