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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.
#include "src/v8.h"
#include "src/interface-descriptors.h"
namespace v8 {
namespace internal {
void CallInterfaceDescriptorData::Initialize(
int register_parameter_count, Register* registers,
Representation* register_param_representations,
PlatformInterfaceDescriptor* platform_descriptor) {
platform_specific_descriptor_ = platform_descriptor;
register_param_count_ = register_parameter_count;
// An interface descriptor must have a context register.
DCHECK(register_parameter_count > 0 &&
registers[0].is(CallInterfaceDescriptor::ContextRegister()));
// InterfaceDescriptor owns a copy of the registers array.
register_params_.Reset(NewArray<Register>(register_parameter_count));
for (int i = 0; i < register_parameter_count; i++) {
register_params_[i] = registers[i];
}
// If a representations array is specified, then the descriptor owns that as
// well.
if (register_param_representations != NULL) {
register_param_representations_.Reset(
NewArray<Representation>(register_parameter_count));
for (int i = 0; i < register_parameter_count; i++) {
// If there is a context register, the representation must be tagged.
DCHECK(
i != 0 ||
register_param_representations[i].Equals(Representation::Tagged()));
register_param_representations_[i] = register_param_representations[i];
}
}
}
const char* CallInterfaceDescriptor::DebugName(Isolate* isolate) {
CallInterfaceDescriptorData* start = isolate->call_descriptor_data(0);
size_t index = data_ - start;
DCHECK(index < CallDescriptors::NUMBER_OF_DESCRIPTORS);
CallDescriptors::Key key = static_cast<CallDescriptors::Key>(index);
switch (key) {
#define DEF_CASE(NAME) \
case CallDescriptors::NAME: \
return #NAME " Descriptor";
INTERFACE_DESCRIPTOR_LIST(DEF_CASE)
#undef DEF_CASE
case CallDescriptors::NUMBER_OF_DESCRIPTORS:
break;
}
return "";
}
void LoadDescriptor::Initialize(CallInterfaceDescriptorData* data) {
Register registers[] = {ContextRegister(), ReceiverRegister(),
NameRegister()};
data->Initialize(arraysize(registers), registers, NULL);
}
void StoreDescriptor::Initialize(CallInterfaceDescriptorData* data) {
Register registers[] = {ContextRegister(), ReceiverRegister(), NameRegister(),
ValueRegister()};
data->Initialize(arraysize(registers), registers, NULL);
}
void ElementTransitionAndStoreDescriptor::Initialize(
CallInterfaceDescriptorData* data) {
Register registers[] = {ContextRegister(), ValueRegister(), MapRegister(),
NameRegister(), ReceiverRegister()};
data->Initialize(arraysize(registers), registers, NULL);
}
void InstanceofDescriptor::Initialize(CallInterfaceDescriptorData* data) {
Register registers[] = {ContextRegister(), left(), right()};
data->Initialize(arraysize(registers), registers, NULL);
}
void MathPowTaggedDescriptor::Initialize(CallInterfaceDescriptorData* data) {
Register registers[] = {ContextRegister(), exponent()};
data->Initialize(arraysize(registers), registers, NULL);
}
void MathPowIntegerDescriptor::Initialize(CallInterfaceDescriptorData* data) {
Register registers[] = {ContextRegister(), exponent()};
data->Initialize(arraysize(registers), registers, NULL);
}
void VectorLoadICTrampolineDescriptor::Initialize(
CallInterfaceDescriptorData* data) {
Register registers[] = {ContextRegister(), ReceiverRegister(), NameRegister(),
SlotRegister()};
data->Initialize(arraysize(registers), registers, NULL);
}
void VectorLoadICDescriptor::Initialize(CallInterfaceDescriptorData* data) {
Register registers[] = {ContextRegister(), ReceiverRegister(), NameRegister(),
SlotRegister(), VectorRegister()};
Representation representations[] = {
Representation::Tagged(), Representation::Tagged(),
Representation::Tagged(), Representation::Smi(),
Representation::Tagged()};
data->Initialize(arraysize(registers), registers, representations);
}
void ApiGetterDescriptor::Initialize(CallInterfaceDescriptorData* data) {
Register registers[] = {ContextRegister(), function_address()};
Representation representations[] = {Representation::Tagged(),
Representation::External()};
data->Initialize(arraysize(registers), registers, representations);
}
void ArgumentsAccessReadDescriptor::Initialize(
CallInterfaceDescriptorData* data) {
Register registers[] = {ContextRegister(), index(), parameter_count()};
data->Initialize(arraysize(registers), registers, NULL);
}
void ContextOnlyDescriptor::Initialize(CallInterfaceDescriptorData* data) {
Register registers[] = {ContextRegister()};
data->Initialize(arraysize(registers), registers, NULL);
}
}
} // namespace v8::internal
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