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