// Copyright 2012 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#if V8_TARGET_ARCH_IA32
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#include "src/interface-descriptors.h"
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namespace v8 {
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namespace internal {
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const Register CallInterfaceDescriptor::ContextRegister() { return esi; }
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void CallInterfaceDescriptor::DefaultInitializePlatformSpecific(
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CallInterfaceDescriptorData* data, int register_parameter_count) {
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#if defined(V8_TARGET_ARCH_IA32) && defined(V8_EMBEDDED_BUILTINS)
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// TODO(jgruber,v8:6666): Keep kRootRegister free unconditionally.
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constexpr Register default_stub_registers[] = {eax, ecx, edx, edi};
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DCHECK(!AreAliased(eax, ecx, edx, edi, kRootRegister));
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#else
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constexpr Register default_stub_registers[] = {eax, ebx, ecx, edx, edi};
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#endif
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STATIC_ASSERT(arraysize(default_stub_registers) == kMaxBuiltinRegisterParams);
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CHECK_LE(static_cast<size_t>(register_parameter_count),
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arraysize(default_stub_registers));
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data->InitializePlatformSpecific(register_parameter_count,
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default_stub_registers);
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}
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void RecordWriteDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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static const Register default_stub_registers[] = {ebx, ecx, edx, edi,
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kReturnRegister0};
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data->RestrictAllocatableRegisters(default_stub_registers,
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arraysize(default_stub_registers));
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CHECK_LE(static_cast<size_t>(kParameterCount),
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arraysize(default_stub_registers));
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data->InitializePlatformSpecific(kParameterCount, default_stub_registers);
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}
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const Register FastNewFunctionContextDescriptor::ScopeInfoRegister() {
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return edi;
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}
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const Register FastNewFunctionContextDescriptor::SlotsRegister() { return eax; }
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const Register LoadDescriptor::ReceiverRegister() { return edx; }
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const Register LoadDescriptor::NameRegister() { return ecx; }
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const Register LoadDescriptor::SlotRegister() { return eax; }
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const Register LoadWithVectorDescriptor::VectorRegister() { return ebx; }
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const Register StoreDescriptor::ReceiverRegister() { return edx; }
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const Register StoreDescriptor::NameRegister() { return ecx; }
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const Register StoreDescriptor::ValueRegister() { return eax; }
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const Register StoreDescriptor::SlotRegister() { return edi; }
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const Register StoreWithVectorDescriptor::VectorRegister() { return ebx; }
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const Register StoreTransitionDescriptor::SlotRegister() { return no_reg; }
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const Register StoreTransitionDescriptor::VectorRegister() { return ebx; }
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const Register StoreTransitionDescriptor::MapRegister() { return edi; }
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const Register ApiGetterDescriptor::HolderRegister() { return ecx; }
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const Register ApiGetterDescriptor::CallbackRegister() { return eax; }
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const Register GrowArrayElementsDescriptor::ObjectRegister() { return eax; }
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const Register GrowArrayElementsDescriptor::KeyRegister() { return ebx; }
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// static
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const Register TypeConversionDescriptor::ArgumentRegister() { return eax; }
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void TypeofDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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Register registers[] = {ebx};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void CallFunctionDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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Register registers[] = {edi};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void CallTrampolineDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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// eax : number of arguments
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// edi : the target to call
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Register registers[] = {edi, eax};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void CallVarargsDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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// eax : number of arguments (on the stack, not including receiver)
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// edi : the target to call
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// ebx : arguments list (FixedArray)
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// ecx : arguments list length (untagged)
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Register registers[] = {edi, eax, ebx, ecx};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void CallForwardVarargsDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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// eax : number of arguments
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// ecx : start index (to support rest parameters)
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// edi : the target to call
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Register registers[] = {edi, eax, ecx};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void CallWithSpreadDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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// eax : number of arguments (on the stack, not including receiver)
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// edi : the target to call
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// ebx : the object to spread
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Register registers[] = {edi, eax, ebx};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void CallWithArrayLikeDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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// edi : the target to call
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// ebx : the arguments list
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Register registers[] = {edi, ebx};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void ConstructVarargsDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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// eax : number of arguments (on the stack, not including receiver)
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// edi : the target to call
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// edx : the new target
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// ebx : arguments list (FixedArray)
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// ecx : arguments list length (untagged)
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Register registers[] = {edi, edx, eax, ebx, ecx};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void ConstructForwardVarargsDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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// eax : number of arguments
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// edx : the new target
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// ecx : start index (to support rest parameters)
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// edi : the target to call
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Register registers[] = {edi, edx, eax, ecx};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void ConstructWithSpreadDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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// eax : number of arguments (on the stack, not including receiver)
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// edi : the target to call
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// edx : the new target
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// ebx : the object to spread
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Register registers[] = {edi, edx, eax, ebx};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void ConstructWithArrayLikeDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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// edi : the target to call
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// edx : the new target
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// ebx : the arguments list
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Register registers[] = {edi, edx, ebx};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void ConstructStubDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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// eax : number of arguments
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// edx : the new target
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// edi : the target to call
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// ebx : allocation site or undefined
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Register registers[] = {edi, edx, eax, ebx};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void AbortDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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Register registers[] = {edx};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void AllocateHeapNumberDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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// register state
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data->InitializePlatformSpecific(0, nullptr);
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}
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void CompareDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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Register registers[] = {edx, eax};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void BinaryOpDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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Register registers[] = {edx, eax};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void ArgumentAdaptorDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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Register registers[] = {
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edi, // JSFunction
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edx, // the new target
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eax, // actual number of arguments
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ebx, // expected number of arguments
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};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void ApiCallbackDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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Register registers[] = {
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JavaScriptFrame::context_register(), // callee context
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ebx, // call_data
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ecx, // holder
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edx, // api_function_address
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};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void InterpreterDispatchDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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Register registers[] = {
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kInterpreterAccumulatorRegister, kInterpreterBytecodeOffsetRegister,
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kInterpreterBytecodeArrayRegister, kInterpreterDispatchTableRegister};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void InterpreterPushArgsThenCallDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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Register registers[] = {
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eax, // argument count (not including receiver)
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ebx, // address of first argument
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edi // the target callable to be call
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};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void InterpreterPushArgsThenConstructDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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Register registers[] = {
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eax, // argument count (not including receiver)
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edx, // new target
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edi, // constructor
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ebx, // allocation site feedback
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ecx, // address of first argument
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};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void ResumeGeneratorDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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Register registers[] = {
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eax, // the value to pass to the generator
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edx // the JSGeneratorObject to resume
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};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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void FrameDropperTrampolineDescriptor::InitializePlatformSpecific(
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CallInterfaceDescriptorData* data) {
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Register registers[] = {
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ebx, // loaded new FP
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};
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data->InitializePlatformSpecific(arraysize(registers), registers);
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}
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} // namespace internal
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} // namespace v8
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#endif // V8_TARGET_ARCH_IA32
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