upload android base code part3

android/art/runtime/arch/instruction_set_features.cc

@@ -0,0 +1,267 @@
+/*
+ * 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 "instruction_set_features.h"
+
+#include "android-base/strings.h"
+
+#include "base/casts.h"
+#include "utils.h"
+
+
+#include "arm/instruction_set_features_arm.h"
+#include "arm64/instruction_set_features_arm64.h"
+#include "mips/instruction_set_features_mips.h"
+#include "mips64/instruction_set_features_mips64.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 kArm:
+    case kThumb2:
+      return ArmInstructionSetFeatures::FromVariant(variant, error_msg);
+    case kArm64:
+      return Arm64InstructionSetFeatures::FromVariant(variant, error_msg);
+    case kMips:
+      return MipsInstructionSetFeatures::FromVariant(variant, error_msg);
+    case kMips64:
+      return Mips64InstructionSetFeatures::FromVariant(variant, error_msg);
+    case kX86:
+      return X86InstructionSetFeatures::FromVariant(variant, error_msg);
+    case kX86_64:
+      return X86_64InstructionSetFeatures::FromVariant(variant, error_msg);
+
+    case kNone:
+      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 kArm:
+    case kThumb2:
+      result = ArmInstructionSetFeatures::FromBitmap(bitmap);
+      break;
+    case kArm64:
+      result = Arm64InstructionSetFeatures::FromBitmap(bitmap);
+      break;
+    case kMips:
+      result = MipsInstructionSetFeatures::FromBitmap(bitmap);
+      break;
+    case kMips64:
+      result = Mips64InstructionSetFeatures::FromBitmap(bitmap);
+      break;
+    case kX86:
+      result = X86InstructionSetFeatures::FromBitmap(bitmap);
+      break;
+    case kX86_64:
+      result = X86_64InstructionSetFeatures::FromBitmap(bitmap);
+      break;
+
+    case kNone:
+    default:
+      UNIMPLEMENTED(FATAL) << isa;
+      UNREACHABLE();
+  }
+  CHECK_EQ(bitmap, result->AsBitmap());
+  return result;
+}
+
+std::unique_ptr<const InstructionSetFeatures> InstructionSetFeatures::FromCppDefines() {
+  switch (kRuntimeISA) {
+    case kArm:
+    case kThumb2:
+      return ArmInstructionSetFeatures::FromCppDefines();
+    case kArm64:
+      return Arm64InstructionSetFeatures::FromCppDefines();
+    case kMips:
+      return MipsInstructionSetFeatures::FromCppDefines();
+    case kMips64:
+      return Mips64InstructionSetFeatures::FromCppDefines();
+    case kX86:
+      return X86InstructionSetFeatures::FromCppDefines();
+    case kX86_64:
+      return X86_64InstructionSetFeatures::FromCppDefines();
+
+    case kNone:
+      break;
+  }
+  UNIMPLEMENTED(FATAL) << kRuntimeISA;
+  UNREACHABLE();
+}
+
+
+std::unique_ptr<const InstructionSetFeatures> InstructionSetFeatures::FromCpuInfo() {
+  switch (kRuntimeISA) {
+    case kArm:
+    case kThumb2:
+      return ArmInstructionSetFeatures::FromCpuInfo();
+    case kArm64:
+      return Arm64InstructionSetFeatures::FromCpuInfo();
+    case kMips:
+      return MipsInstructionSetFeatures::FromCpuInfo();
+    case kMips64:
+      return Mips64InstructionSetFeatures::FromCpuInfo();
+    case kX86:
+      return X86InstructionSetFeatures::FromCpuInfo();
+    case kX86_64:
+      return X86_64InstructionSetFeatures::FromCpuInfo();
+
+    case kNone:
+      break;
+  }
+  UNIMPLEMENTED(FATAL) << kRuntimeISA;
+  UNREACHABLE();
+}
+
+std::unique_ptr<const InstructionSetFeatures> InstructionSetFeatures::FromHwcap() {
+  switch (kRuntimeISA) {
+    case kArm:
+    case kThumb2:
+      return ArmInstructionSetFeatures::FromHwcap();
+    case kArm64:
+      return Arm64InstructionSetFeatures::FromHwcap();
+    case kMips:
+      return MipsInstructionSetFeatures::FromHwcap();
+    case kMips64:
+      return Mips64InstructionSetFeatures::FromHwcap();
+    case kX86:
+      return X86InstructionSetFeatures::FromHwcap();
+    case kX86_64:
+      return X86_64InstructionSetFeatures::FromHwcap();
+
+    case kNone:
+      break;
+  }
+  UNIMPLEMENTED(FATAL) << kRuntimeISA;
+  UNREACHABLE();
+}
+
+std::unique_ptr<const InstructionSetFeatures> InstructionSetFeatures::FromAssembly() {
+  switch (kRuntimeISA) {
+    case kArm:
+    case kThumb2:
+      return ArmInstructionSetFeatures::FromAssembly();
+    case kArm64:
+      return Arm64InstructionSetFeatures::FromAssembly();
+    case kMips:
+      return MipsInstructionSetFeatures::FromAssembly();
+    case kMips64:
+      return Mips64InstructionSetFeatures::FromAssembly();
+    case kX86:
+      return X86InstructionSetFeatures::FromAssembly();
+    case kX86_64:
+      return X86_64InstructionSetFeatures::FromAssembly();
+
+    case kNone:
+      break;
+  }
+  UNIMPLEMENTED(FATAL) << kRuntimeISA;
+  UNREACHABLE();
+}
+
+std::unique_ptr<const InstructionSetFeatures> InstructionSetFeatures::AddFeaturesFromString(
+    const std::string& feature_list, std::string* error_msg) const {
+  if (feature_list.empty()) {
+    *error_msg = "No instruction set features specified";
+    return std::unique_ptr<const InstructionSetFeatures>();
+  }
+  std::vector<std::string> features;
+  Split(feature_list, ',', &features);
+  bool use_default = false;  // Have we seen the 'default' feature?
+  bool first = false;  // Is this first feature?
+  for (auto it = features.begin(); it != features.end();) {
+    if (use_default) {
+      *error_msg = "Unexpected instruction set features after 'default'";
+      return std::unique_ptr<const InstructionSetFeatures>();
+    }
+    std::string feature = android::base::Trim(*it);
+    bool erase = false;
+    if (feature == "default") {
+      if (!first) {
+        use_default = true;
+        erase = true;
+      } else {
+        *error_msg = "Unexpected instruction set features before 'default'";
+        return std::unique_ptr<const InstructionSetFeatures>();
+      }
+    }
+    if (!erase) {
+      ++it;
+    } else {
+      it = features.erase(it);
+    }
+    first = true;
+  }
+  // Expectation: "default" is standalone, no other flags. But an empty features vector after
+  // processing can also come along if the handled flags are the only ones in the list. So
+  // logically, we check "default -> features.empty."
+  DCHECK(!use_default || features.empty());
+
+  return AddFeaturesFromSplitString(features, error_msg);
+}
+
+const ArmInstructionSetFeatures* InstructionSetFeatures::AsArmInstructionSetFeatures() const {
+  DCHECK_EQ(kArm, GetInstructionSet());
+  return down_cast<const ArmInstructionSetFeatures*>(this);
+}
+
+const Arm64InstructionSetFeatures* InstructionSetFeatures::AsArm64InstructionSetFeatures() const {
+  DCHECK_EQ(kArm64, GetInstructionSet());
+  return down_cast<const Arm64InstructionSetFeatures*>(this);
+}
+
+const MipsInstructionSetFeatures* InstructionSetFeatures::AsMipsInstructionSetFeatures() const {
+  DCHECK_EQ(kMips, GetInstructionSet());
+  return down_cast<const MipsInstructionSetFeatures*>(this);
+}
+
+const Mips64InstructionSetFeatures* InstructionSetFeatures::AsMips64InstructionSetFeatures() const {
+  DCHECK_EQ(kMips64, GetInstructionSet());
+  return down_cast<const Mips64InstructionSetFeatures*>(this);
+}
+
+const X86InstructionSetFeatures* InstructionSetFeatures::AsX86InstructionSetFeatures() const {
+  DCHECK(kX86 == GetInstructionSet() || kX86_64 == GetInstructionSet());
+  return down_cast<const X86InstructionSetFeatures*>(this);
+}
+
+const X86_64InstructionSetFeatures* InstructionSetFeatures::AsX86_64InstructionSetFeatures() const {
+  DCHECK_EQ(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::ostream& operator<<(std::ostream& os, const InstructionSetFeatures& rhs) {
+  os << "ISA: " << rhs.GetInstructionSet() << " Feature string: " << rhs.GetFeatureString();
+  return os;
+}
+
+}  // namespace art