upload android base code part3
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263
android/art/runtime/primitive.h
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263
android/art/runtime/primitive.h
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/*
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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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#ifndef ART_RUNTIME_PRIMITIVE_H_
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#define ART_RUNTIME_PRIMITIVE_H_
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#include <sys/types.h>
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#include "base/logging.h"
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#include "base/macros.h"
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namespace art {
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static constexpr size_t kObjectReferenceSize = 4;
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constexpr size_t ComponentSizeShiftWidth(size_t component_size) {
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return component_size == 1u ? 0u :
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component_size == 2u ? 1u :
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component_size == 4u ? 2u :
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component_size == 8u ? 3u : 0u;
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}
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class Primitive {
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public:
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enum Type {
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kPrimNot = 0,
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kPrimBoolean,
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kPrimByte,
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kPrimChar,
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kPrimShort,
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kPrimInt,
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kPrimLong,
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kPrimFloat,
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kPrimDouble,
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kPrimVoid,
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kPrimLast = kPrimVoid
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};
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static Type GetType(char type) {
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switch (type) {
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case 'B':
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return kPrimByte;
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case 'C':
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return kPrimChar;
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case 'D':
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return kPrimDouble;
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case 'F':
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return kPrimFloat;
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case 'I':
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return kPrimInt;
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case 'J':
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return kPrimLong;
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case 'S':
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return kPrimShort;
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case 'Z':
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return kPrimBoolean;
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case 'V':
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return kPrimVoid;
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default:
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return kPrimNot;
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}
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}
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static size_t ComponentSizeShift(Type type) {
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switch (type) {
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case kPrimVoid:
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case kPrimBoolean:
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case kPrimByte: return 0;
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case kPrimChar:
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case kPrimShort: return 1;
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case kPrimInt:
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case kPrimFloat: return 2;
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case kPrimLong:
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case kPrimDouble: return 3;
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case kPrimNot: return ComponentSizeShiftWidth(kObjectReferenceSize);
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default:
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LOG(FATAL) << "Invalid type " << static_cast<int>(type);
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return 0;
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}
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}
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static size_t ComponentSize(Type type) {
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switch (type) {
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case kPrimVoid: return 0;
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case kPrimBoolean:
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case kPrimByte: return 1;
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case kPrimChar:
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case kPrimShort: return 2;
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case kPrimInt:
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case kPrimFloat: return 4;
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case kPrimLong:
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case kPrimDouble: return 8;
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case kPrimNot: return kObjectReferenceSize;
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default:
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LOG(FATAL) << "Invalid type " << static_cast<int>(type);
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return 0;
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}
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}
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static const char* Descriptor(Type type) {
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switch (type) {
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case kPrimBoolean:
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return "Z";
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case kPrimByte:
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return "B";
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case kPrimChar:
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return "C";
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case kPrimShort:
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return "S";
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case kPrimInt:
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return "I";
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case kPrimFloat:
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return "F";
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case kPrimLong:
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return "J";
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case kPrimDouble:
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return "D";
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case kPrimVoid:
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return "V";
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default:
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LOG(FATAL) << "Primitive char conversion on invalid type " << static_cast<int>(type);
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return nullptr;
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}
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}
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static const char* PrettyDescriptor(Type type);
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// Returns the descriptor corresponding to the boxed type of |type|.
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static const char* BoxedDescriptor(Type type);
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static bool IsFloatingPointType(Type type) {
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return type == kPrimFloat || type == kPrimDouble;
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}
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static bool IsIntegralType(Type type) {
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// The Java language does not allow treating boolean as an integral type but
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// our bit representation makes it safe.
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switch (type) {
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case kPrimBoolean:
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case kPrimByte:
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case kPrimChar:
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case kPrimShort:
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case kPrimInt:
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case kPrimLong:
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return true;
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default:
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return false;
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}
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}
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// Return true if |type| is an numeric type.
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static constexpr bool IsNumericType(Type type) {
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switch (type) {
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case Primitive::Type::kPrimNot: return false;
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case Primitive::Type::kPrimBoolean: return false;
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case Primitive::Type::kPrimByte: return true;
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case Primitive::Type::kPrimChar: return false;
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case Primitive::Type::kPrimShort: return true;
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case Primitive::Type::kPrimInt: return true;
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case Primitive::Type::kPrimLong: return true;
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case Primitive::Type::kPrimFloat: return true;
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case Primitive::Type::kPrimDouble: return true;
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case Primitive::Type::kPrimVoid: return false;
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}
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}
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// Returns true if it is possible to widen type |from| to type |to|. Both |from| and
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// |to| should be numeric primitive types.
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static bool IsWidenable(Type from, Type to) {
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static_assert(Primitive::Type::kPrimByte < Primitive::Type::kPrimShort, "Bad ordering");
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static_assert(Primitive::Type::kPrimShort < Primitive::Type::kPrimInt, "Bad ordering");
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static_assert(Primitive::Type::kPrimInt < Primitive::Type::kPrimLong, "Bad ordering");
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static_assert(Primitive::Type::kPrimLong < Primitive::Type::kPrimFloat, "Bad ordering");
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static_assert(Primitive::Type::kPrimFloat < Primitive::Type::kPrimDouble, "Bad ordering");
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// Widening is only applicable between numeric types, like byte
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// and int. Non-numeric types, such as boolean, cannot be widened.
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return IsNumericType(from) && IsNumericType(to) && from <= to;
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}
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static bool IsIntOrLongType(Type type) {
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return type == kPrimInt || type == kPrimLong;
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}
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static bool Is64BitType(Type type) {
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return type == kPrimLong || type == kPrimDouble;
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}
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// Return the general kind of `type`, fusing integer-like types as kPrimInt.
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static Type PrimitiveKind(Type type) {
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switch (type) {
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case kPrimBoolean:
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case kPrimByte:
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case kPrimShort:
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case kPrimChar:
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case kPrimInt:
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return kPrimInt;
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default:
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return type;
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}
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}
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static int64_t MinValueOfIntegralType(Type type) {
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switch (type) {
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case kPrimBoolean:
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return std::numeric_limits<bool>::min();
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case kPrimByte:
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return std::numeric_limits<int8_t>::min();
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case kPrimChar:
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return std::numeric_limits<uint16_t>::min();
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case kPrimShort:
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return std::numeric_limits<int16_t>::min();
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case kPrimInt:
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return std::numeric_limits<int32_t>::min();
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case kPrimLong:
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return std::numeric_limits<int64_t>::min();
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default:
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LOG(FATAL) << "non integral type";
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}
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return 0;
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}
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static int64_t MaxValueOfIntegralType(Type type) {
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switch (type) {
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case kPrimBoolean:
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return std::numeric_limits<bool>::max();
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case kPrimByte:
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return std::numeric_limits<int8_t>::max();
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case kPrimChar:
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return std::numeric_limits<uint16_t>::max();
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case kPrimShort:
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return std::numeric_limits<int16_t>::max();
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case kPrimInt:
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return std::numeric_limits<int32_t>::max();
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case kPrimLong:
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return std::numeric_limits<int64_t>::max();
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default:
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LOG(FATAL) << "non integral type";
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}
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return 0;
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}
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private:
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DISALLOW_IMPLICIT_CONSTRUCTORS(Primitive);
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};
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std::ostream& operator<<(std::ostream& os, const Primitive::Type& state);
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} // namespace art
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#endif // ART_RUNTIME_PRIMITIVE_H_
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