v8/src/x64/interface-descriptors-x64.cc

// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#if V8_TARGET_ARCH_X64

#include "src/interface-descriptors.h"

namespace v8 {
namespace internal {

const Register CallInterfaceDescriptor::ContextRegister() { return rsi; }

void CallInterfaceDescriptor::DefaultInitializePlatformSpecific(
    CallInterfaceDescriptorData* data, int register_parameter_count) {
  const Register default_stub_registers[] = {rax, rbx, rcx, rdx, rdi};
  CHECK_LE(static_cast<size_t>(register_parameter_count),
           arraysize(default_stub_registers));
  data->InitializePlatformSpecific(register_parameter_count,
                                   default_stub_registers);
}

const Register FastNewFunctionContextDescriptor::FunctionRegister() {
  return rdi;
}
const Register FastNewFunctionContextDescriptor::SlotsRegister() { return rax; }

const Register LoadDescriptor::ReceiverRegister() { return rdx; }
const Register LoadDescriptor::NameRegister() { return rcx; }
const Register LoadDescriptor::SlotRegister() { return rax; }

const Register LoadWithVectorDescriptor::VectorRegister() { return rbx; }

const Register LoadICProtoArrayDescriptor::HandlerRegister() { return rdi; }

const Register StoreDescriptor::ReceiverRegister() { return rdx; }
const Register StoreDescriptor::NameRegister() { return rcx; }
const Register StoreDescriptor::ValueRegister() { return rax; }
const Register StoreDescriptor::SlotRegister() { return rdi; }

const Register StoreWithVectorDescriptor::VectorRegister() { return rbx; }

const Register StoreTransitionDescriptor::SlotRegister() { return rdi; }
const Register StoreTransitionDescriptor::VectorRegister() { return rbx; }
const Register StoreTransitionDescriptor::MapRegister() { return r11; }

const Register StringCompareDescriptor::LeftRegister() { return rdx; }
const Register StringCompareDescriptor::RightRegister() { return rax; }

const Register ApiGetterDescriptor::HolderRegister() { return rcx; }
const Register ApiGetterDescriptor::CallbackRegister() { return rbx; }

const Register MathPowTaggedDescriptor::exponent() { return rdx; }


const Register MathPowIntegerDescriptor::exponent() {
  return MathPowTaggedDescriptor::exponent();
}


const Register GrowArrayElementsDescriptor::ObjectRegister() { return rax; }
const Register GrowArrayElementsDescriptor::KeyRegister() { return rbx; }


void FastNewClosureDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  // SharedFunctionInfo, vector, slot index.
  Register registers[] = {rbx, rcx, rdx};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}

void TypeofDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {rbx};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}


// static
const Register TypeConversionDescriptor::ArgumentRegister() { return rax; }

void FastCloneRegExpDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {rdi, rax, rcx, rdx};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}


void FastCloneShallowArrayDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {rax, rbx, rcx};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}


void FastCloneShallowObjectDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {rax, rbx, rcx, rdx};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}


void CreateAllocationSiteDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {rbx, rdx};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}


void CreateWeakCellDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {rbx, rdx, rdi};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}


void CallFunctionDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {rdi};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}

void CallICTrampolineDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {rdi, rax, rdx};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}

void CallICDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {rdi, rax, rdx, rbx};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}


void CallConstructDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  // rax : number of arguments
  // rbx : feedback vector
  // rdx : slot in feedback vector (Smi, for RecordCallTarget)
  // rdi : constructor function
  // TODO(turbofan): So far we don't gather type feedback and hence skip the
  // slot parameter, but ArrayConstructStub needs the vector to be undefined.
  Register registers[] = {rax, rdi, rbx};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}


void CallTrampolineDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  // rax : number of arguments
  // rdi : the target to call
  Register registers[] = {rdi, rax};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}

void CallForwardVarargsDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  // rcx : start index (to support rest parameters)
  // rdi : the target to call
  Register registers[] = {rdi, rcx};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}

void ConstructStubDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  // rax : number of arguments
  // rdx : the new target
  // rdi : the target to call
  // rbx : allocation site or undefined
  Register registers[] = {rdi, rdx, rax, rbx};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}


void ConstructTrampolineDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  // rax : number of arguments
  // rdx : the new target
  // rdi : the target to call
  Register registers[] = {rdi, rdx, rax};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}


void TransitionElementsKindDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {rax, rbx};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}


void AllocateHeapNumberDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  data->InitializePlatformSpecific(0, nullptr, nullptr);
}

void ArrayConstructorDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  // kTarget, kNewTarget, kActualArgumentsCount, kAllocationSite
  Register registers[] = {rdi, rdx, rax, rbx};
  data->InitializePlatformSpecific(arraysize(registers), registers, NULL);
}

void ArrayNoArgumentConstructorDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  // register state
  // rax -- number of arguments
  // rdi -- function
  // rbx -- allocation site with elements kind
  Register registers[] = {rdi, rbx, rax};
  data->InitializePlatformSpecific(arraysize(registers), registers, NULL);
}

void ArraySingleArgumentConstructorDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  // register state
  // rax -- number of arguments
  // rdi -- function
  // rbx -- allocation site with elements kind
  Register registers[] = {rdi, rbx, rax};
  data->InitializePlatformSpecific(arraysize(registers), registers, NULL);
}

void ArrayNArgumentsConstructorDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  // register state
  // rax -- number of arguments
  // rdi -- function
  // rbx -- allocation site with elements kind
  Register registers[] = {rdi, rbx, rax};
  data->InitializePlatformSpecific(arraysize(registers), registers, NULL);
}

void VarArgFunctionDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  // stack param count needs (arg count)
  Register registers[] = {rax};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}

void CompareDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {rdx, rax};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}


void BinaryOpDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {rdx, rax};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}


void BinaryOpWithAllocationSiteDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {rcx, rdx, rax};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}

void BinaryOpWithVectorDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  // register state
  // rdx -- lhs
  // rax -- rhs
  // rdi -- slot id
  // rbx -- vector
  Register registers[] = {rdx, rax, rdi, rbx};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}

void CountOpDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {rax};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}

void StringAddDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {rdx, rax};
  data->InitializePlatformSpecific(arraysize(registers), registers);
}


void KeyedDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {
      rcx,  // key
  };
  data->InitializePlatformSpecific(arraysize(registers), registers);
}


void NamedDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {
      rcx,  // name
  };
  data->InitializePlatformSpecific(arraysize(registers), registers);
}


void CallHandlerDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {
      rdx,  // receiver
  };
  data->InitializePlatformSpecific(arraysize(registers), registers);
}


void ArgumentAdaptorDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {
      rdi,  // JSFunction
      rdx,  // the new target
      rax,  // actual number of arguments
      rbx,  // expected number of arguments
  };
  data->InitializePlatformSpecific(arraysize(registers), registers);
}

void ApiCallbackDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {
      rdi,  // callee
      rbx,  // call_data
      rcx,  // holder
      rdx,  // 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 InterpreterPushArgsAndCallDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {
      rax,  // argument count (not including receiver)
      rbx,  // address of first argument
      rdi   // the target callable to be call
  };
  data->InitializePlatformSpecific(arraysize(registers), registers);
}

void InterpreterPushArgsAndConstructDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {
      rax,  // argument count (not including receiver)
      rdx,  // new target
      rdi,  // constructor
      rbx,  // allocation site feedback if available, undefined otherwise
      rcx,  // address of first argument
  };
  data->InitializePlatformSpecific(arraysize(registers), registers);
}

void InterpreterPushArgsAndConstructArrayDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {
      rax,  // argument count (not including receiver)
      rdx,  // target to the call. It is checked to be Array function.
      rbx,  // allocation site feedback
      rcx,  // address of first argument
  };
  data->InitializePlatformSpecific(arraysize(registers), registers);
}

void InterpreterCEntryDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {
      rax,  // argument count (argc)
      r15,  // address of first argument (argv)
      rbx   // the runtime function to call
  };
  data->InitializePlatformSpecific(arraysize(registers), registers);
}

void ResumeGeneratorDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {
      rax,  // the value to pass to the generator
      rbx,  // the JSGeneratorObject to resume
      rdx   // the resume mode (tagged)
  };
  data->InitializePlatformSpecific(arraysize(registers), registers);
}

void FrameDropperTrampolineDescriptor::InitializePlatformSpecific(
    CallInterfaceDescriptorData* data) {
  Register registers[] = {
      rbx,  // loaded new FP
  };
  data->InitializePlatformSpecific(arraysize(registers), registers);
}

}  // namespace internal
}  // namespace v8

#endif  // V8_TARGET_ARCH_X64