mirror of
https://github.com/TomHarte/CLK.git
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277 lines
8.6 KiB
C++
277 lines
8.6 KiB
C++
//
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// Instruction.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 12/05/2022.
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// Copyright © 2022 Thomas Harte. All rights reserved.
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//
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#include "Instruction.hpp"
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#include <cassert>
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using namespace InstructionSet::M68k;
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std::string Preinstruction::operand_description(int index, int opcode) const {
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switch(mode(index)) {
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default: assert(false);
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case AddressingMode::None:
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return "";
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case AddressingMode::DataRegisterDirect:
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return std::string("D") + std::to_string(reg(index));
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case AddressingMode::AddressRegisterDirect:
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return std::string("A") + std::to_string(reg(index));
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case AddressingMode::AddressRegisterIndirect:
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return std::string("(A") + std::to_string(reg(index)) + ")";
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case AddressingMode::AddressRegisterIndirectWithPostincrement:
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return std::string("(A") + std::to_string(reg(index)) + ")+";
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case AddressingMode::AddressRegisterIndirectWithPredecrement:
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return std::string("-(A") + std::to_string(reg(index)) + ")";
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case AddressingMode::AddressRegisterIndirectWithDisplacement:
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return std::string("(d16, A") + std::to_string(reg(index)) + ")";
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case AddressingMode::AddressRegisterIndirectWithIndex8bitDisplacement:
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return std::string("(d8, A") + std::to_string(reg(index)) + ", Xn)";
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case AddressingMode::ProgramCounterIndirectWithDisplacement:
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return "(d16, PC)";
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case AddressingMode::ProgramCounterIndirectWithIndex8bitDisplacement:
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return "(d8, PC, Xn)";
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case AddressingMode::AbsoluteShort:
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return "(xxx).w";
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case AddressingMode::AbsoluteLong:
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return "(xxx).l";
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case AddressingMode::ImmediateData:
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return "#";
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case AddressingMode::Quick:
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if(opcode == -1) {
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return "Q";
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}
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return std::to_string(int(quick(uint16_t(opcode), operation)));
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}
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}
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namespace {
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const char *_to_string(Operation operation, bool is_quick) {
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switch(operation) {
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case Operation::Undefined: return "None";
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case Operation::NOP: return "NOP";
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case Operation::ABCD: return "ABCD";
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case Operation::SBCD: return "SBCD";
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case Operation::NBCD: return "NBCD";
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case Operation::ADDb: return "ADD.b";
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case Operation::ADDw: return "ADD.w";
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case Operation::ADDl: return "ADD.l";
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case Operation::ADDAw: return is_quick ? "ADD.w" : "ADDA.w";
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case Operation::ADDAl: return is_quick ? "ADD.l" : "ADDA.l";
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case Operation::ADDXb: return "ADDX.b";
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case Operation::ADDXw: return "ADDX.w";
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case Operation::ADDXl: return "ADDX.l";
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case Operation::SUBb: return "SUB.b";
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case Operation::SUBw: return "SUB.w";
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case Operation::SUBl: return "SUB.l";
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case Operation::SUBAw: return is_quick ? "SUB.w" : "SUBA.w";
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case Operation::SUBAl: return is_quick ? "SUB.l" : "SUBA.l";
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case Operation::SUBXb: return "SUBX.b";
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case Operation::SUBXw: return "SUBX.w";
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case Operation::SUBXl: return "SUBX.l";
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case Operation::MOVEb: return "MOVE.b";
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case Operation::MOVEw: return "MOVE.w";
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case Operation::MOVEl: return is_quick ? "MOVE.q" : "MOVE.l";
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case Operation::MOVEAw: return "MOVEA.w";
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case Operation::MOVEAl: return "MOVEA.l";
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case Operation::LEA: return "LEA";
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case Operation::PEA: return "PEA";
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case Operation::MOVEtoSR: return "MOVEtoSR";
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case Operation::MOVEfromSR: return "MOVEfromSR";
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case Operation::MOVEtoCCR: return "MOVEtoCCR";
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case Operation::MOVEtoUSP: return "MOVEtoUSP";
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case Operation::MOVEfromUSP: return "MOVEfromUSP";
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case Operation::ORItoSR: return "ORItoSR";
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case Operation::ORItoCCR: return "ORItoCCR";
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case Operation::ANDItoSR: return "ANDItoSR";
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case Operation::ANDItoCCR: return "ANDItoCCR";
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case Operation::EORItoSR: return "EORItoSR";
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case Operation::EORItoCCR: return "EORItoCCR";
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case Operation::BTST: return "BTST";
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case Operation::BCLR: return "BCLR";
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case Operation::BCHG: return "BCHG";
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case Operation::BSET: return "BSET";
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case Operation::CMPb: return "CMP.b";
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case Operation::CMPw: return "CMP.w";
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case Operation::CMPl: return "CMP.l";
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case Operation::CMPAw: return "CMPA.w";
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case Operation::CMPAl: return "CMPA.l";
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case Operation::TSTb: return "TST.b";
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case Operation::TSTw: return "TST.w";
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case Operation::TSTl: return "TST.l";
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case Operation::JMP: return "JMP";
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case Operation::JSR: return "JSR";
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case Operation::RTS: return "RTS";
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case Operation::DBcc: return "DBcc";
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case Operation::Scc: return "Scc";
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case Operation::Bccb:
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case Operation::Bccl:
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case Operation::Bccw: return "Bcc";
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case Operation::BSRb:
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case Operation::BSRl:
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case Operation::BSRw: return "BSR";
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case Operation::CLRb: return "CLR.b";
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case Operation::CLRw: return "CLR.w";
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case Operation::CLRl: return "CLR.l";
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case Operation::NEGXb: return "NEGX.b";
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case Operation::NEGXw: return "NEGX.w";
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case Operation::NEGXl: return "NEGX.l";
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case Operation::NEGb: return "NEG.b";
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case Operation::NEGw: return "NEG.w";
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case Operation::NEGl: return "NEG.l";
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case Operation::ASLb: return "ASL.b";
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case Operation::ASLw: return "ASL.w";
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case Operation::ASLl: return "ASL.l";
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case Operation::ASLm: return "ASL.w";
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case Operation::ASRb: return "ASR.b";
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case Operation::ASRw: return "ASR.w";
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case Operation::ASRl: return "ASR.l";
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case Operation::ASRm: return "ASR.w";
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case Operation::LSLb: return "LSL.b";
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case Operation::LSLw: return "LSL.w";
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case Operation::LSLl: return "LSL.l";
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case Operation::LSLm: return "LSL.w";
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case Operation::LSRb: return "LSR.b";
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case Operation::LSRw: return "LSR.w";
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case Operation::LSRl: return "LSR.l";
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case Operation::LSRm: return "LSR.w";
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case Operation::ROLb: return "ROL.b";
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case Operation::ROLw: return "ROL.w";
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case Operation::ROLl: return "ROL.l";
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case Operation::ROLm: return "ROL.w";
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case Operation::RORb: return "ROR.b";
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case Operation::RORw: return "ROR.w";
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case Operation::RORl: return "ROR.l";
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case Operation::RORm: return "ROR.w";
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case Operation::ROXLb: return "ROXL.b";
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case Operation::ROXLw: return "ROXL.w";
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case Operation::ROXLl: return "ROXL.l";
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case Operation::ROXLm: return "ROXL.w";
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case Operation::ROXRb: return "ROXR.b";
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case Operation::ROXRw: return "ROXR.w";
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case Operation::ROXRl: return "ROXR.l";
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case Operation::ROXRm: return "ROXR.w";
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case Operation::MOVEMtoMl: return "MOVEM.l";
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case Operation::MOVEMtoMw: return "MOVEM.w";
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case Operation::MOVEMtoRl: return "MOVEM.l";
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case Operation::MOVEMtoRw: return "MOVEM.w";
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case Operation::MOVEPl: return "MOVEP.l";
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case Operation::MOVEPw: return "MOVEP.w";
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case Operation::ANDb: return "AND.b";
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case Operation::ANDw: return "AND.w";
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case Operation::ANDl: return "AND.l";
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case Operation::EORb: return "EOR.b";
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case Operation::EORw: return "EOR.w";
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case Operation::EORl: return "EOR.l";
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case Operation::NOTb: return "NOT.b";
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case Operation::NOTw: return "NOT.w";
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case Operation::NOTl: return "NOT.l";
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case Operation::ORb: return "OR.b";
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case Operation::ORw: return "OR.w";
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case Operation::ORl: return "OR.l";
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case Operation::MULU: return "MULU";
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case Operation::MULS: return "MULS";
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case Operation::DIVU: return "DIVU";
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case Operation::DIVS: return "DIVS";
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case Operation::RTE: return "RTE";
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case Operation::RTR: return "RTR";
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case Operation::TRAP: return "TRAP";
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case Operation::TRAPV: return "TRAPV";
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case Operation::CHK: return "CHK";
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case Operation::EXG: return "EXG";
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case Operation::SWAP: return "SWAP";
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case Operation::TAS: return "TAS";
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case Operation::EXTbtow: return "EXT.w";
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case Operation::EXTwtol: return "EXT.l";
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case Operation::LINKw: return "LINK";
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case Operation::UNLINK: return "UNLINK";
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case Operation::STOP: return "STOP";
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case Operation::RESET: return "RESET";
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default:
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assert(false);
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return "???";
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}
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}
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}
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const char *InstructionSet::M68k::to_string(Operation operation) {
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return _to_string(operation, false);
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}
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std::string Preinstruction::to_string(int opcode) const {
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if(operation == Operation::Undefined) return "None";
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const char *const instruction = _to_string(operation, mode<0>() == AddressingMode::Quick);
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const bool flip_operands = (operation == Operation::MOVEMtoRl) || (operation == Operation::MOVEMtoRw);
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const std::string operand1 = operand_description(0 ^ int(flip_operands), opcode);
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const std::string operand2 = operand_description(1 ^ int(flip_operands), opcode);
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std::string result = instruction;
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if(!operand1.empty()) result += std::string(" ") + operand1;
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if(!operand2.empty()) result += std::string(", ") + operand2;
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return result;
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}
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const char *Preinstruction::operation_string() const {
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return _to_string(operation, mode<0>() == AddressingMode::Quick);
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}
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