Subversion Repositories lxp32

/*

 * Copyright (c) 2016 by Alex I. Kuznetsov.

 *

 * Part of the LXP32 CPU IP core.

 *

 * This module defines the Assembler class which performs

 * compilation of LXP32 assembly source files.

 */

#ifndef ASSEMBLER_H_INCLUDED

#define ASSEMBLER_H_INCLUDED

#include "linkableobject.h"

#include <vector>

#include <map>

#include <string>

#include <cstdint>

class Assembler {

        typedef std::vector<std::string> TokenList;

        typedef std::int_least64_t Integer;

        enum LexerState {

                Initial,

                Word,

                StringLiteral,

                BlockComment

        };

        struct Operand {

                enum Type {Null,Register,Identifier,NumericLiteral};

                Type type=Null;

                std::string str;

                Integer i=0;

                std::uint8_t reg=0;

        };

        LinkableObject _obj;

        std::map<std::string,TokenList> _macros;

        LexerState _state;

        int _line;

        std::vector<std::string> _currentLabels;

        std::string _currentFileName;

        std::vector<std::string> _includeSearchDirs;

        std::vector<std::string> _exportedSymbols;

        std::vector<bool> _sectionEnabled;

public:

        void processFile(const std::string &filename);

        void addIncludeSearchDir(const std::string &dir);

        int line() const;

        std::string currentFileName() const;

        LinkableObject &object();

        const LinkableObject &object() const;

private:

        void processFileRecursive(const std::string &filename);

        TokenList tokenize(const std::string &str);

        void expand(TokenList &list);

        void elaborate(TokenList &list);

        void elaborateDirective(TokenList &list);

        LinkableObject::Word elaborateDataDefinition(TokenList &list);

        LinkableObject::Word elaborateInstruction(TokenList &list);

        bool isSectionEnabled() const;

        static bool validateIdentifier(const std::string &str);

        static Integer numericLiteral(const std::string &str);

        static std::vector<Operand> getOperands(const TokenList &list);

// LXP32 instructions

        void encodeDstOperand(LinkableObject::Word &word,const Operand &arg);

        void encodeRd1Operand(LinkableObject::Word &word,const Operand &arg);

        void encodeRd2Operand(LinkableObject::Word &word,const Operand &arg);

        void encodeAdd(const TokenList &list);

        void encodeAnd(const TokenList &list);

        void encodeCall(const TokenList &list);

        void encodeCjmpxx(const TokenList &list);

        void encodeDivs(const TokenList &list);

        void encodeDivu(const TokenList &list);

        void encodeHlt(const TokenList &list);

        void encodeJmp(const TokenList &list);

        void encodeIret(const TokenList &list);

        void encodeLc(const TokenList &list);

        void encodeLcs(const TokenList &list);

        void encodeLsb(const TokenList &list);

        void encodeLub(const TokenList &list);

        void encodeLw(const TokenList &list);

        void encodeMods(const TokenList &list);

        void encodeModu(const TokenList &list);

        void encodeMov(const TokenList &list);

        void encodeMul(const TokenList &list);

        void encodeNeg(const TokenList &list);

        void encodeNop(const TokenList &list);

        void encodeNot(const TokenList &list);

        void encodeOr(const TokenList &list);

        void encodeRet(const TokenList &list);

        void encodeSb(const TokenList &list);

        void encodeSl(const TokenList &list);

        void encodeSrs(const TokenList &list);

        void encodeSru(const TokenList &list);

        void encodeSub(const TokenList &list);

        void encodeSw(const TokenList &list);

        void encodeXor(const TokenList &list);

};

#endif