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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <algorithm>
#include "instruction_set_features.h"
#include <algorithm>
#include <ostream>
#include <algorithm>
#include "android-base/strings.h"
#include "base/casts.h"
#include "base/utils.h"
#include "arm/instruction_set_features_arm.h"
#include "arm64/instruction_set_features_arm64.h"
#include "x86/instruction_set_features_x86.h"
#include "x86_64/instruction_set_features_x86_64.h"
namespace art {
std::unique_ptr<const InstructionSetFeatures> InstructionSetFeatures::FromVariant(
InstructionSet isa, const std::string& variant, std::string* error_msg) {
switch (isa) {
case InstructionSet::kArm:
case InstructionSet::kThumb2:
return ArmInstructionSetFeatures::FromVariant(variant, error_msg);
case InstructionSet::kArm64:
return Arm64InstructionSetFeatures::FromVariant(variant, error_msg);
case InstructionSet::kX86:
return X86InstructionSetFeatures::FromVariant(variant, error_msg);
case InstructionSet::kX86_64:
return X86_64InstructionSetFeatures::FromVariant(variant, error_msg);
default:
break;
}
UNIMPLEMENTED(FATAL) << isa;
UNREACHABLE();
}
std::unique_ptr<const InstructionSetFeatures> InstructionSetFeatures::FromBitmap(InstructionSet isa,
uint32_t bitmap) {
std::unique_ptr<const InstructionSetFeatures> result;
switch (isa) {
case InstructionSet::kArm:
case InstructionSet::kThumb2:
result = ArmInstructionSetFeatures::FromBitmap(bitmap);
break;
case InstructionSet::kArm64:
result = Arm64InstructionSetFeatures::FromBitmap(bitmap);
break;
case InstructionSet::kX86:
result = X86InstructionSetFeatures::FromBitmap(bitmap);
break;
case InstructionSet::kX86_64:
result = X86_64InstructionSetFeatures::FromBitmap(bitmap);
break;
default:
UNIMPLEMENTED(FATAL) << isa;
UNREACHABLE();
}
CHECK_EQ(bitmap, result->AsBitmap());
return result;
}
std::unique_ptr<const InstructionSetFeatures> InstructionSetFeatures::FromCppDefines() {
switch (kRuntimeISA) {
case InstructionSet::kArm:
case InstructionSet::kThumb2:
return ArmInstructionSetFeatures::FromCppDefines();
case InstructionSet::kArm64:
return Arm64InstructionSetFeatures::FromCppDefines();
case InstructionSet::kX86:
return X86InstructionSetFeatures::FromCppDefines();
case InstructionSet::kX86_64:
return X86_64InstructionSetFeatures::FromCppDefines();
default:
break;
}
UNIMPLEMENTED(FATAL) << kRuntimeISA;
UNREACHABLE();
}
std::unique_ptr<const InstructionSetFeatures> InstructionSetFeatures::FromRuntimeDetection() {
switch (kRuntimeISA) {
#ifdef ART_TARGET_ANDROID
case InstructionSet::kArm64:
return Arm64InstructionSetFeatures::FromHwcap();
#endif
default:
return nullptr;
}
}
std::unique_ptr<const InstructionSetFeatures> InstructionSetFeatures::FromCpuInfo() {
switch (kRuntimeISA) {
case InstructionSet::kArm:
case InstructionSet::kThumb2:
return ArmInstructionSetFeatures::FromCpuInfo();
case InstructionSet::kArm64:
return Arm64InstructionSetFeatures::FromCpuInfo();
case InstructionSet::kX86:
return X86InstructionSetFeatures::FromCpuInfo();
case InstructionSet::kX86_64:
return X86_64InstructionSetFeatures::FromCpuInfo();
default:
break;
}
UNIMPLEMENTED(FATAL) << kRuntimeISA;
UNREACHABLE();
}
std::unique_ptr<const InstructionSetFeatures> InstructionSetFeatures::FromHwcap() {
switch (kRuntimeISA) {
case InstructionSet::kArm:
case InstructionSet::kThumb2:
return ArmInstructionSetFeatures::FromHwcap();
case InstructionSet::kArm64:
return Arm64InstructionSetFeatures::FromHwcap();
case InstructionSet::kX86:
return X86InstructionSetFeatures::FromHwcap();
case InstructionSet::kX86_64:
return X86_64InstructionSetFeatures::FromHwcap();
default:
break;
}
UNIMPLEMENTED(FATAL) << kRuntimeISA;
UNREACHABLE();
}
std::unique_ptr<const InstructionSetFeatures> InstructionSetFeatures::FromAssembly() {
switch (kRuntimeISA) {
case InstructionSet::kArm:
case InstructionSet::kThumb2:
return ArmInstructionSetFeatures::FromAssembly();
case InstructionSet::kArm64:
return Arm64InstructionSetFeatures::FromAssembly();
case InstructionSet::kX86:
return X86InstructionSetFeatures::FromAssembly();
case InstructionSet::kX86_64:
return X86_64InstructionSetFeatures::FromAssembly();
default:
break;
}
UNIMPLEMENTED(FATAL) << kRuntimeISA;
UNREACHABLE();
}
std::unique_ptr<const InstructionSetFeatures> InstructionSetFeatures::AddFeaturesFromString(
const std::string& feature_list, /* out */ std::string* error_msg) const {
std::vector<std::string> features;
Split(feature_list, ',', &features);
std::transform(std::begin(features), std::end(features), std::begin(features),
[](const std::string &s) { return android::base::Trim(s); });
auto empty_strings_begin = std::copy_if(std::begin(features), std::end(features),
std::begin(features),
[](const std::string& s) { return !s.empty(); });
features.erase(empty_strings_begin, std::end(features));
if (features.empty()) {
*error_msg = "No instruction set features specified";
return nullptr;
}
bool use_default = false;
bool use_runtime_detection = false;
for (const std::string& feature : features) {
if (feature == "default") {
if (features.size() > 1) {
*error_msg = "Specific instruction set feature(s) cannot be used when 'default' is used.";
return nullptr;
}
use_default = true;
features.pop_back();
break;
} else if (feature == "runtime") {
if (features.size() > 1) {
*error_msg = "Specific instruction set feature(s) cannot be used when 'runtime' is used.";
return nullptr;
}
use_runtime_detection = true;
features.pop_back();
break;
}
}
// Expectation: "default" and "runtime" are standalone, no other feature names.
// But an empty features vector after processing can also come along if the
// handled feature names are the only ones in the list. So
// logically, we check "default or runtime => features.empty."
DCHECK((!use_default && !use_runtime_detection) || features.empty());
std::unique_ptr<const InstructionSetFeatures> runtime_detected_features;
if (use_runtime_detection) {
runtime_detected_features = FromRuntimeDetection();
}
if (runtime_detected_features != nullptr) {
return AddRuntimeDetectedFeatures(runtime_detected_features.get());
} else {
return AddFeaturesFromSplitString(features, error_msg);
}
}
const ArmInstructionSetFeatures* InstructionSetFeatures::AsArmInstructionSetFeatures() const {
DCHECK_EQ(InstructionSet::kArm, GetInstructionSet());
return down_cast<const ArmInstructionSetFeatures*>(this);
}
const Arm64InstructionSetFeatures* InstructionSetFeatures::AsArm64InstructionSetFeatures() const {
DCHECK_EQ(InstructionSet::kArm64, GetInstructionSet());
return down_cast<const Arm64InstructionSetFeatures*>(this);
}
const X86InstructionSetFeatures* InstructionSetFeatures::AsX86InstructionSetFeatures() const {
DCHECK(InstructionSet::kX86 == GetInstructionSet() ||
InstructionSet::kX86_64 == GetInstructionSet());
return down_cast<const X86InstructionSetFeatures*>(this);
}
const X86_64InstructionSetFeatures* InstructionSetFeatures::AsX86_64InstructionSetFeatures() const {
DCHECK_EQ(InstructionSet::kX86_64, GetInstructionSet());
return down_cast<const X86_64InstructionSetFeatures*>(this);
}
bool InstructionSetFeatures::FindVariantInArray(const char* const variants[], size_t num_variants,
const std::string& variant) {
const char* const * begin = variants;
const char* const * end = begin + num_variants;
return std::find(begin, end, variant) != end;
}
std::unique_ptr<const InstructionSetFeatures> InstructionSetFeatures::AddRuntimeDetectedFeatures(
const InstructionSetFeatures *features ATTRIBUTE_UNUSED) const {
UNIMPLEMENTED(FATAL) << kRuntimeISA;
UNREACHABLE();
}
std::ostream& operator<<(std::ostream& os, const InstructionSetFeatures& rhs) {
os << "ISA: " << rhs.GetInstructionSet() << " Feature string: " << rhs.GetFeatureString();
return os;
}
} // namespace art
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