mirror of
https://github.com/MoleskiCoder/EightBit.git
synced 2024-12-23 00:29:47 +00:00
431 lines
9.2 KiB
C++
431 lines
9.2 KiB
C++
#pragma once
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#include <cstdint>
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#include <string>
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#include <EightBitCompilerDefinitions.h>
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namespace EightBit {
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class Bus;
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class MOS6502;
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class Symbols;
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class Disassembly {
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public:
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Disassembly(Bus& bus, MOS6502& processor, const Symbols& symbols);
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std::string disassemble(uint16_t current);
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static std::string dump_Flags(uint8_t value);
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static std::string dump_ByteValue(uint8_t value);
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static std::string dump_WordValue(uint16_t value);
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private:
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Bus& m_bus;
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MOS6502& processor;
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const Symbols& symbols;
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mutable uint16_t m_address = 0xffff;
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std::string disassemble_Implied(const std::string& instruction) const {
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return "\t" + instruction;
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}
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std::string disassemble_Absolute(const std::string& instruction) {
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return AM_Absolute_dump() + "\t" + instruction + " " + AM_Absolute();
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}
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std::string disassemble_Indirect(const std::string& instruction) {
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return AM_Absolute_dump() + "\t" + instruction + " (" + AM_Absolute() + ")";
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}
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std::string disassemble_Relative(const std::string& instruction, uint16_t address) {
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return AM_Immediate_dump() + "\t" + instruction + " $" + dump_WordValue(address);
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}
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std::string disassemble_Immediate(const std::string& instruction) {
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return AM_Immediate_dump() + "\t" + instruction + " " + AM_Immediate();
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}
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std::string disassemble_AM_00(int bbb, const std::string& instruction) {
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return AM_00_dump(bbb) + "\t" + instruction + " " + AM_00(bbb);
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}
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std::string disassemble_AM_01(int bbb, const std::string& instruction) {
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return AM_01_dump(bbb) + "\t" + instruction + " " + AM_01(bbb);
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}
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std::string disassemble_AM_10(int bbb, const std::string& instruction) {
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return AM_10_dump(bbb) + "\t" + instruction + " " + AM_10(bbb);
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}
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std::string disassemble_AM_10_x(int bbb, const std::string& instruction) {
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return AM_10_x_dump(bbb) + "\t" + instruction + " " + AM_10_x(bbb);
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}
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std::string disassemble_AM_11(int bbb, const std::string& instruction) {
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return AM_11_dump(bbb) + "\t" + instruction + " " + AM_11(bbb);
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}
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std::string disassemble_AM_11_x(int bbb, const std::string& instruction) {
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return AM_11_x_dump(bbb) + "\t" + instruction + " " + AM_11_x(bbb);
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}
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std::string AM_Immediate_dump() {
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return dump_Byte(m_address + 1);
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}
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std::string AM_Immediate() {
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return "#$" + AM_Immediate_dump();
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}
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std::string AM_Absolute_dump() {
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return dump_DByte(m_address + 1);
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}
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std::string AM_Absolute() {
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return "$" + dump_Word(m_address + 1);
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}
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std::string AM_ZeroPage_dump() {
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return dump_Byte(m_address + 1);
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}
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std::string AM_ZeroPage() {
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return "$" + dump_Byte(m_address + 1);
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}
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std::string AM_ZeroPageX_dump() {
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return AM_ZeroPage_dump();
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}
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std::string AM_ZeroPageX() {
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return AM_ZeroPage() + ",X";
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}
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std::string AM_ZeroPageY_dump() {
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return AM_ZeroPage_dump();
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}
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std::string AM_ZeroPageY() {
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return AM_ZeroPage() + ",Y";
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}
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std::string AM_AbsoluteX_dump() {
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return AM_Absolute_dump();
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}
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std::string AM_AbsoluteX() {
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return AM_Absolute() + ",X";
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}
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std::string AM_AbsoluteY_dump() {
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return AM_Absolute_dump();
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}
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std::string AM_AbsoluteY() {
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return AM_Absolute() + ",Y";
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}
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std::string AM_IndexedIndirectX_dump() {
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return AM_ZeroPage_dump();
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}
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std::string AM_IndexedIndirectX() {
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return "($" + dump_Byte(m_address + 1) + ",X)";
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}
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std::string AM_IndirectIndexedY_dump() {
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return AM_ZeroPage_dump();
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}
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std::string AM_IndirectIndexedY() {
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return "($" + dump_Byte(m_address + 1) + "),Y";
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}
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std::string AM_00_dump(int bbb) {
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switch (bbb) {
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case 0b000:
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return AM_Immediate_dump();
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case 0b001:
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return AM_ZeroPage_dump();
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case 0b011:
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return AM_Absolute_dump();
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case 0b101:
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return AM_ZeroPageX_dump();
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case 0b111:
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return AM_AbsoluteX_dump();
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case 0b010:
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case 0b100:
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case 0b110:
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throw std::domain_error("Illegal addressing mode");
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default:
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UNREACHABLE;
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}
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}
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std::string AM_00(int bbb) {
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switch (bbb) {
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case 0b000:
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return AM_Immediate();
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case 0b001:
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return AM_ZeroPage();
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case 0b011:
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return AM_Absolute();
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case 0b101:
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return AM_ZeroPageX();
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case 0b111:
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return AM_AbsoluteX();
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case 0b010:
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case 0b100:
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case 0b110:
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throw std::domain_error("Illegal addressing mode");
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default:
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UNREACHABLE;
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}
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}
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std::string AM_01_dump(int bbb) {
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switch (bbb) {
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case 0b000:
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return AM_IndexedIndirectX_dump();
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case 0b001:
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return AM_ZeroPage_dump();
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case 0b010:
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return AM_Immediate_dump();
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case 0b011:
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return AM_Absolute_dump();
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case 0b100:
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return AM_IndirectIndexedY_dump();
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case 0b101:
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return AM_ZeroPageX_dump();
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case 0b110:
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return AM_AbsoluteY_dump();
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case 0b111:
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return AM_AbsoluteX_dump();
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default:
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UNREACHABLE;
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}
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}
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std::string AM_01(int bbb) {
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switch (bbb) {
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case 0b000:
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return AM_IndexedIndirectX();
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case 0b001:
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return AM_ZeroPage();
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case 0b010:
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return AM_Immediate();
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case 0b011:
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return AM_Absolute();
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case 0b100:
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return AM_IndirectIndexedY();
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case 0b101:
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return AM_ZeroPageX();
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case 0b110:
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return AM_AbsoluteY();
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case 0b111:
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return AM_AbsoluteX();
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default:
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UNREACHABLE;
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}
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}
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std::string AM_10_dump(int bbb) {
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switch (bbb) {
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case 0b000:
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return AM_Immediate_dump();
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case 0b001:
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return AM_ZeroPage_dump();
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case 0b010:
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return "";
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case 0b011:
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return AM_Absolute_dump();
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case 0b101:
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return AM_ZeroPageX_dump();
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case 0b111:
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return AM_AbsoluteX_dump();
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case 0b100:
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case 0b110:
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throw std::domain_error("Illegal addressing mode");
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default:
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UNREACHABLE;
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}
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}
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std::string AM_10(int bbb) {
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switch (bbb) {
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case 0b000:
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return AM_Immediate();
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case 0b001:
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return AM_ZeroPage();
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case 0b010:
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return "A";
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case 0b011:
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return AM_Absolute();
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case 0b101:
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return AM_ZeroPageX();
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case 0b111:
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return AM_AbsoluteX();
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case 0b100:
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case 0b110:
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throw std::domain_error("Illegal addressing mode");
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default:
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UNREACHABLE;
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}
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}
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std::string AM_10_x_dump(int bbb) {
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switch (bbb) {
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case 0b000:
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return AM_Immediate_dump();
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case 0b001:
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return AM_ZeroPage_dump();
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case 0b010:
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return "";
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case 0b011:
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return AM_Absolute_dump();
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case 0b101:
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return AM_ZeroPageY_dump();
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case 0b111:
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return AM_AbsoluteY_dump();
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case 0b100:
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case 0b110:
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throw std::domain_error("Illegal addressing mode");
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default:
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UNREACHABLE;
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}
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}
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std::string AM_10_x(int bbb) {
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switch (bbb) {
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case 0b000:
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return AM_Immediate();
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case 0b001:
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return AM_ZeroPage();
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case 0b010:
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return "A";
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case 0b011:
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return AM_Absolute();
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case 0b101:
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return AM_ZeroPageY();
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case 0b111:
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return AM_AbsoluteY();
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case 0b100:
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case 0b110:
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throw std::domain_error("Illegal addressing mode");
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default:
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UNREACHABLE;
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}
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}
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std::string AM_11_dump(int bbb) {
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switch (bbb) {
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case 0b000:
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return AM_IndexedIndirectX_dump();
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case 0b001:
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return AM_ZeroPage_dump();
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case 0b010:
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return AM_Immediate_dump();
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case 0b011:
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return AM_Absolute_dump();
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case 0b100:
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return AM_IndirectIndexedY_dump();
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case 0b101:
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return AM_ZeroPageY_dump();
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case 0b110:
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throw std::domain_error("Illegal addressing mode");
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case 0b111:
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return AM_AbsoluteY_dump();
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default:
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UNREACHABLE;
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}
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}
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std::string AM_11_x_dump(int bbb) {
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switch (bbb) {
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case 0b000:
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return AM_IndexedIndirectX_dump();
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case 0b001:
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return AM_ZeroPage_dump();
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case 0b010:
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return AM_Immediate_dump();
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case 0b011:
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return AM_Absolute_dump();
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case 0b100:
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return AM_IndirectIndexedY_dump();
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case 0b101:
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return AM_ZeroPageX_dump();
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case 0b110:
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return AM_AbsoluteY_dump();
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case 0b111:
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return AM_AbsoluteX_dump();
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default:
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UNREACHABLE;
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}
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}
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std::string AM_11(int bbb) {
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switch (bbb) {
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case 0b000:
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return AM_IndexedIndirectX();
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case 0b001:
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return AM_ZeroPage();
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case 0b010:
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return AM_Immediate();
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case 0b011:
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return AM_Absolute();
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case 0b100:
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return AM_IndirectIndexedY();
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case 0b101:
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return AM_ZeroPageY();
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case 0b110:
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throw std::domain_error("Illegal addressing mode");
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case 0b111:
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return AM_AbsoluteY();
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default:
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UNREACHABLE;
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}
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}
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std::string AM_11_x(int bbb) {
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switch (bbb) {
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case 0b000:
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return AM_IndexedIndirectX();
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case 0b001:
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return AM_ZeroPage();
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case 0b010:
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return AM_Immediate();
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case 0b011:
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return AM_Absolute();
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case 0b100:
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return AM_IndirectIndexedY();
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case 0b101:
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return AM_ZeroPageX();
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case 0b110:
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return AM_AbsoluteY();
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case 0b111:
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return AM_AbsoluteX();
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default:
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UNREACHABLE;
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}
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}
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static void dump(std::ostream& out, int value, int width);
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uint8_t getByte(uint16_t address);
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uint16_t getWord(uint16_t address);
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std::string dump_Byte(uint16_t address);
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std::string dump_DByte(uint16_t address);
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std::string dump_Word(uint16_t address);
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std::string convertAddress(uint16_t address) const;
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std::string convertAddress(uint8_t address) const;
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std::string convertConstant(uint16_t constant);
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std::string convertConstant(uint8_t constant) const;
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Bus& BUS() { return m_bus; }
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};
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} |