112 lines
2.4 KiB
C++
112 lines
2.4 KiB
C++
#include "stdafx.h"
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#include "Disassembler.h"
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#include <sstream>
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#include <iomanip>
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#include <bitset>
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#include "Memory.h"
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#include "Intel8080.h"
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#include "StatusFlags.h"
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EightBit::Disassembler::Disassembler() {
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}
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std::string EightBit::Disassembler::state(Intel8080& cpu) {
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auto pc = cpu.getProgramCounter();
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auto sp = cpu.getStackPointer();
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auto a = cpu.A();
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auto f = cpu.F();
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auto b = cpu.B();
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auto c = cpu.C();
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auto d = cpu.D();
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auto e = cpu.E();
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auto h = cpu.H();
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auto l = cpu.L();
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std::ostringstream output;
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output
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<< "PC=" << hex(pc.word)
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<< " "
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<< "SP=" << hex(sp.word)
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<< " " << "A=" << hex(a) << " " << "F=" << (std::string)f
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<< " " << "B=" << hex(b) << " " << "C=" << hex(c)
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<< " " << "D=" << hex(d) << " " << "E=" << hex(e)
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<< " " << "H=" << hex(h) << " " << "L=" << hex(l);
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return output.str();
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}
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std::string EightBit::Disassembler::disassemble(Intel8080& cpu) {
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const auto& memory = cpu.getMemory();
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auto pc = cpu.getProgramCounter();
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auto opcode = memory.peek(pc.word);
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const auto& instruction = cpu.getInstructions()[opcode];
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std::ostringstream output;
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// hex opcode
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output << hex(opcode);
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// hex raw operand
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switch (instruction.mode) {
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case Intel8080::Immediate:
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output << hex(memory.peek(pc.word + 1));
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break;
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case Intel8080::Absolute:
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output << hex(memory.peek(pc.word + 1));
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output << hex(memory.peek(pc.word + 2));
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break;
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default:
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break;
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}
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output << "\t";
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// base disassembly
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output << instruction.disassembly;
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// disassembly operand
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switch (instruction.mode) {
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case Intel8080::Immediate:
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output << hex(memory.peek(pc.word + 1));
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break;
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case Intel8080::Absolute:
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output << hex(cpu.getWord(pc.word + 1).word);
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break;
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default:
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break;
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}
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return output.str();
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}
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std::string EightBit::Disassembler::hex(uint8_t value) {
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std::ostringstream output;
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output << std::hex << std::setw(2) << std::setfill('0') << (int)value;
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return output.str();
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}
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std::string EightBit::Disassembler::hex(uint16_t value) {
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std::ostringstream output;
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output << std::hex << std::setw(4) << std::setfill('0') << (int)value;
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return output.str();
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}
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std::string EightBit::Disassembler::binary(uint8_t value) {
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std::ostringstream output;
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output << std::bitset<8>(value);
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return output.str();
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}
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std::string EightBit::Disassembler::invalid(uint8_t value) {
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std::ostringstream output;
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output << "Invalid instruction: " << hex(value) << "(" << binary(value) << ")";
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return output.str();
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} |