159 lines
4 KiB
C++
159 lines
4 KiB
C++
/*
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* Copyright 2017, 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 INSTRUCTIONS_H
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#define INSTRUCTIONS_H
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#include <stdint.h>
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#include <iostream>
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#include <string>
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#include <vector>
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#include "core_defs.h"
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#include "entity.h"
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#include "opcodes_generated.h"
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#include "types_generated.h"
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#include "visitor.h"
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#include "word_stream.h"
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namespace android {
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namespace spirit {
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// Word count for a serialized operand
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template <typename T> uint16_t WordCount(T) { return 1; }
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inline uint16_t WordCount(PairLiteralIntegerIdRef) { return 2; }
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inline uint16_t WordCount(PairIdRefLiteralInteger) { return 2; }
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inline uint16_t WordCount(PairIdRefIdRef) { return 2; }
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inline uint16_t WordCount(const std::string &operand) {
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return operand.length() / 4 + 1;
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}
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class Instruction : public Entity {
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public:
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Instruction(uint32_t opCode) : mCodeAndCount(opCode) {}
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Instruction(uint32_t opCode, uint32_t fixedWordCount)
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: mCodeAndCount(opCode), mFixedWordCount(fixedWordCount) {}
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virtual ~Instruction() {}
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void accept(IVisitor *v) override;
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void setWordCount() const {
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if (mCodeAndCount.mWordCount == 0) {
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mCodeAndCount.mWordCount = getWordCount();
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}
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}
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virtual uint16_t getWordCount() const = 0;
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virtual bool hasResult() const = 0;
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virtual IdResult getId() const = 0;
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virtual void setId(IdResult) = 0;
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virtual std::vector<const IdRef *> getAllIdRefs() const = 0;
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Instruction *addExtraOperand(uint32_t word) {
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mExtraOperands.push_back(word);
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return this;
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}
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// Adds decoration to the current instruction.
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// Returns: the result OpDecorate instruction
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DecorateInst *decorate(Decoration);
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MemberDecorateInst *memberDecorate(int member, Decoration);
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bool DeserializeFirstWord(InputWordStream &IS, OpCode opcode) {
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if (IS.empty()) {
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return false;
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}
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OpCodeAndWordCount codeAndCount(*IS);
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if (codeAndCount.mOpCode != opcode) {
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return false;
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}
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mRemainingWordCount = codeAndCount.mWordCount;
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IS >> &mCodeAndCount;
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mRemainingWordCount--;
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return true;
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}
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template <typename T>
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bool DeserializeExactlyOne(InputWordStream &IS, T *operand) {
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if (IS.empty()) {
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return false;
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}
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IS >> operand;
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mRemainingWordCount -= WordCount(*operand);
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return true;
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}
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template <typename T>
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bool DeserializeOptionallyOne(InputWordStream &IS, T **operand) {
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if (mRemainingWordCount == 0) {
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return true;
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}
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*operand = new T();
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return DeserializeExactlyOne(IS, *operand);
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}
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template <typename T>
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bool DeserializeZeroOrMoreOperands(InputWordStream &IS,
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std::vector<T> *operands) {
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while (mRemainingWordCount > 0) {
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T tmp;
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if (!DeserializeExactlyOne(IS, &tmp)) {
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return false;
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}
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operands->push_back(tmp);
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}
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return true;
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}
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bool DeserializeExtraOperands(InputWordStream &IS) {
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return DeserializeZeroOrMoreOperands(IS, &mExtraOperands);
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}
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void SerializeExtraOperands(OutputWordStream &OS) const {
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for (uint32_t w : mExtraOperands) {
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OS << w;
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}
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}
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const std::vector<Instruction *> &getAnnotations() const {
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return mDecorations;
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}
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uint16_t getOpCode() const { return mCodeAndCount.mOpCode; }
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mutable OpCodeAndWordCount mCodeAndCount;
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uint16_t mFixedWordCount;
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uint16_t mRemainingWordCount;
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std::vector<uint32_t> mExtraOperands;
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std::vector<Instruction *> mDecorations;
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};
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} // namespace spirit
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} // namespace android
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#include "instructions_generated.h"
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#endif // INSTRUCTIONS_H
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