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// 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/codegen/interface-descriptors.h"
#include "src/execution/frames.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);
}
void EphemeronKeyBarrierDescriptor::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 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
LoadWithReceiverAndVectorDescriptor::LookupStartObjectRegister() {
return edi;
}
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 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 CallFunctionTemplateDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
// edx : function template info
// ecx : number of arguments (on the stack, not including receiver)
Register registers[] = {edx, 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 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[] = {
edx, // kApiFunctionAddress
ecx, // kArgc
eax, // kCallData
edi, // kHolder
};
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);
}
void RunMicrotasksEntryDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
data->InitializePlatformSpecific(0, nullptr);
}
void WasmFloat32ToNumberDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
// Work around using eax, whose register code is 0, and leads to the FP
// parameter being passed via xmm0, which is not allocatable on ia32.
Register registers[] = {ecx};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void WasmFloat64ToNumberDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
// Work around using eax, whose register code is 0, and leads to the FP
// parameter being passed via xmm0, which is not allocatable on ia32.
Register registers[] = {ecx};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
} // namespace internal
} // namespace v8
#endif // V8_TARGET_ARCH_IA32