mirror of
https://github.com/arabine/open-story-teller.git
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132 lines
3.6 KiB
C++
132 lines
3.6 KiB
C++
/*
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The MIT License
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Copyright (c) 2022 Anthony Rabine
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#ifndef CHIP32_ASSEMBLER_H
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#define CHIP32_ASSEMBLER_H
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#include "chip32_vm.h"
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#include <vector>
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#include <cstdint>
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#include <string>
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#include <map>
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#include <iostream>
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namespace Chip32
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{
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struct Mnemonics {
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std::string mnemonic;
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OpCode op;
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};
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// Complete tokenized instruction
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struct Instr {
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uint16_t line{0};
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std::vector<std::string> args;
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std::vector<uint8_t> compiledArgs;
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OpCode code { 0, 0, 0 };
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std::string mnemonic;
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uint16_t dataTypeSize{0};
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uint16_t dataLen{0};
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bool isLabel{false}; //!< If true, this is a label, otherwise it is an instruction
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bool useLabel{false}; //!< If true, the instruction uses a label
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bool isRomData{false}; //!< True if constant data in ROM (DC)
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bool isRamData{false}; //!< True if RAM variable (DV or DZ)
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bool isZeroData{false}; //!< True if zero-initialized RAM (DZ only)
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uint32_t addr{0}; //!< Instruction/data address (ROM for DC, RAM for DV/DZ)
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bool isRomCode() const { return !(isLabel || isRomData || isRamData); }
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};
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struct RegNames
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{
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chip32_register_t reg;
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std::string name;
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};
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class Assembler
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{
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public:
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struct Error {
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std::string message;
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int line{-1};
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std::string ToString() const {
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if (line < 0)
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return "No error";
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else
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return "Error line " + std::to_string(line) + ", " + message;
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}
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};
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// Separated parser to allow only code check
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bool Parse(const std::string &data);
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void Clear() {
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m_labels.clear();
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m_instructions.clear();
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}
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static std::vector<std::string> Split(const std::string &line);
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std::vector<Instr>::const_iterator begin() { return m_instructions.begin(); }
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std::vector<Instr>::const_iterator end() { return m_instructions.end(); }
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// Returns the register number from the name
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bool GetRegister(const std::string ®Name, uint8_t ®);
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bool GetRegisterName(uint8_t reg, std::string ®Name);
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Error GetLastError() { return m_lastError; }
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bool GetMain(Instr &instr) const {
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// Find the main label
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bool success = m_labels.count(".main") == 1;
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if (success)
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{
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instr = m_labels.at(".main");
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}
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return success;
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}
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private:
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bool CompileMnemonicArguments(Instr &instr);
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// label, address
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std::map<std::string, Instr> m_labels;
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Error m_lastError;
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std::vector<Instr> m_instructions;
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bool CompileConstantArgument(Instr &instr, const std::string &a);
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};
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}
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#endif // CHIP32_ASSEMBLER_H
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