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z80.hpp
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z80.hpp
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/**
* SUZUKI PLAN - Z80 Emulator
* -----------------------------------------------------------------------------
* The MIT License (MIT)
*
* Copyright (c) 2019 Yoji Suzuki.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* -----------------------------------------------------------------------------
*/
#ifndef INCLUDE_Z80_HPP
#define INCLUDE_Z80_HPP
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if !defined(Z80_DISABLE_BREAKPOINT) || !defined(Z80_DISABLE_NESTCHECK)
#include <map>
#include <vector>
#endif
#ifndef Z80_NO_FUNCTIONAL
#include <functional>
#endif
#ifndef Z80_NO_EXCEPTION
#include <stdexcept>
#endif
class Z80
{
public: // Interface data types
struct WaitClocks {
int fetch; // Wait T-cycle (Hz) before fetching instruction (default is 0 = no wait)
int fetchM; // Wait T-cycle (Hz) before fetching multi-bytes instruction (default is 0 = no wait)
int read; // Wait T-cycle (Hz) before to read memory (default is 0 = no wait)
int write; // Wait T-cycle (Hz) before to write memory (default is 0 = no wait)
} wtc;
struct RegisterPair {
unsigned char A;
unsigned char F;
unsigned char B;
unsigned char C;
unsigned char D;
unsigned char E;
unsigned char H;
unsigned char L;
};
struct Register {
struct RegisterPair pair;
struct RegisterPair back;
unsigned short PC;
unsigned short SP;
unsigned short IX;
unsigned short IY;
unsigned short interruptVector; // interrupt vector for IRQ
unsigned short interruptAddrN; // interrupt address for NMI
unsigned short WZ;
unsigned short reserved16;
unsigned char R;
unsigned char I;
unsigned char IFF;
unsigned char interrupt; // NI-- --mm (N: NMI, I: IRQ, mm: mode)
unsigned char consumeClockCounter;
unsigned char execEI;
unsigned char reserved8[2];
} reg;
inline unsigned char flagS() { return 0b10000000; }
inline unsigned char flagZ() { return 0b01000000; }
inline unsigned char flagY() { return 0b00100000; }
inline unsigned char flagH() { return 0b00010000; }
inline unsigned char flagX() { return 0b00001000; }
inline unsigned char flagPV() { return 0b00000100; }
inline unsigned char flagN() { return 0b00000010; }
inline unsigned char flagC() { return 0b00000001; }
inline unsigned char readByte(unsigned short addr, int clock = 4)
{
#ifndef Z80_DISABLE_BREAKPOINT
if (clock && wtc.read) consumeClock(wtc.read);
unsigned char byte = CB.read(CB.arg, addr);
if (clock) consumeClock(clock);
#else
consumeClock(wtc.read);
unsigned char byte = CB.read(CB.arg, addr);
consumeClock(clock);
#endif
return byte;
}
inline void writeByte(unsigned short addr, unsigned char value, int clock = 4)
{
consumeClock(wtc.write);
CB.write(CB.arg, addr, value);
consumeClock(clock);
}
private: // Internal functions & variables
// bit table
const unsigned char bits[8] = {0b00000001, 0b00000010, 0b00000100, 0b00001000, 0b00010000, 0b00100000, 0b01000000, 0b10000000};
// flag setter
inline void setFlagS() { reg.pair.F |= flagS(); }
inline void setFlagZ() { reg.pair.F |= flagZ(); }
inline void setFlagY() { reg.pair.F |= flagY(); }
inline void setFlagH() { reg.pair.F |= flagH(); }
inline void setFlagX() { reg.pair.F |= flagX(); }
inline void setFlagPV() { reg.pair.F |= flagPV(); }
inline void setFlagN() { reg.pair.F |= flagN(); }
inline void setFlagC() { reg.pair.F |= flagC(); }
inline void resetFlagS() { reg.pair.F &= ~flagS(); }
inline void resetFlagZ() { reg.pair.F &= ~flagZ(); }
inline void resetFlagY() { reg.pair.F &= ~flagY(); }
inline void resetFlagH() { reg.pair.F &= ~flagH(); }
inline void resetFlagX() { reg.pair.F &= ~flagX(); }
inline void resetFlagPV() { reg.pair.F &= ~flagPV(); }
inline void resetFlagN() { reg.pair.F &= ~flagN(); }
inline void resetFlagC() { reg.pair.F &= ~flagC(); }
inline void setFlagS(bool on) { on ? setFlagS() : resetFlagS(); }
inline void setFlagZ(bool on) { on ? setFlagZ() : resetFlagZ(); }
inline void setFlagY(bool on) { on ? setFlagY() : resetFlagY(); }
inline void setFlagH(bool on) { on ? setFlagH() : resetFlagH(); }
inline void setFlagX(bool on) { on ? setFlagX() : resetFlagX(); }
inline void setFlagPV(bool on) { on ? setFlagPV() : resetFlagPV(); }
inline void setFlagN(bool on) { on ? setFlagN() : resetFlagN(); }
inline void setFlagC(bool on) { on ? setFlagC() : resetFlagC(); }
inline void setFlagXY(unsigned char value)
{
setFlagX(value & flagX());
setFlagY(value & flagY());
}
// flag checker
inline bool isFlagS() { return reg.pair.F & flagS(); }
inline bool isFlagZ() { return reg.pair.F & flagZ(); }
inline bool isFlagH() { return reg.pair.F & flagH(); }
inline bool isFlagPV() { return reg.pair.F & flagPV(); }
inline bool isFlagN() { return reg.pair.F & flagN(); }
inline bool isFlagC() { return reg.pair.F & flagC(); }
enum class Condition {
Z = 0x40,
C = 0x01,
PV = 0x04,
S = 0x80,
NZ = 0x4040,
NC = 0x0101,
NPV = 0x0404,
NS = 0x8080,
};
inline bool checkConditionFlag(Condition c)
{
int ic = (int)c;
return (ic & reg.pair.F) ^ ((ic & 0xFF00) >> 8);
}
inline unsigned char IFF1() { return 0b00000001; }
inline unsigned char IFF2() { return 0b00000100; }
inline unsigned char IFF_IRQ() { return 0b00100000; }
inline unsigned char IFF_NMI() { return 0b01000000; }
inline unsigned char IFF_HALT() { return 0b10000000; }
#ifndef Z80_DISABLE_BREAKPOINT
class BreakPoint
{
public:
unsigned short addr;
#ifdef Z80_NO_FUNCTIONAL
void (*callback)(void*);
BreakPoint(unsigned short addr_, void (*callback_)(void*))
#else
std::function<void(void*)> callback;
BreakPoint(unsigned short addr_, const std::function<void(void*)>& callback_)
#endif
{
this->addr = addr_;
this->callback = callback_;
}
};
class BreakOperand
{
public:
int prefixNumber;
unsigned char operandNumber;
#ifdef Z80_NO_FUNCTIONAL
void (*callback)(void*, unsigned char*, int);
BreakOperand(int prefixNumber_, unsigned char operandNumber_, void (*callback_)(void*, unsigned char*, int))
{
this->prefixNumber = prefixNumber_;
this->operandNumber = operandNumber_;
this->callback = callback_;
}
#else
std::function<void(void*, unsigned char*, int)> callback;
BreakOperand(int prefixNumber_, unsigned char operandNumber_, const std::function<void(void*, unsigned char*, int)>& callback_)
{
this->prefixNumber = prefixNumber_;
this->operandNumber = operandNumber_;
this->callback = callback_;
}
#endif
};
#endif
#ifndef Z80_DISABLE_NESTCHECK
class SimpleHandler
{
public:
#ifdef Z80_NO_FUNCTIONAL
void (*callback)(void*);
SimpleHandler(void (*callback_)(void*))
#else
std::function<void(void*)> callback;
SimpleHandler(const std::function<void(void*)>& callback_)
#endif
{
this->callback = callback_;
}
};
inline void invokeReturnHandlers()
{
for (auto handler : this->CB.returnHandlers) {
handler->callback(this->CB.arg);
}
}
inline void invokeCallHandlers()
{
for (auto handler : this->CB.callHandlers) {
handler->callback(this->CB.arg);
}
}
#endif
struct Callback {
#ifdef Z80_NO_FUNCTIONAL
unsigned char (*read)(void*, unsigned short);
void (*write)(void*, unsigned short, unsigned char);
unsigned char (*in)(void*, unsigned short);
void (*out)(void*, unsigned short, unsigned char);
void (*consumeClock)(void*, int);
#else
std::function<unsigned char(void*, unsigned short)> read;
std::function<void(void*, unsigned short, unsigned char)> write;
std::function<unsigned char(void*, unsigned short)> in;
std::function<void(void*, unsigned short, unsigned char)> out;
std::function<void(void*, int)> consumeClock;
#endif
#ifndef Z80_UNSUPPORT_16BIT_PORT
bool returnPortAs16Bits;
#endif
#ifndef Z80_DISABLE_DEBUG
#ifdef Z80_NO_FUNCTIONAL
void (*debugMessage)(void*, const char*);
#else
std::function<void(void*, const char*)> debugMessage;
#endif
bool debugMessageEnabled;
#endif
#ifndef Z80_DISABLE_BREAKPOINT
std::map<int, std::vector<BreakPoint*>*> breakPoints;
std::map<int, std::vector<BreakOperand*>*> breakOperands;
#endif
#ifndef Z80_DISABLE_NESTCHECK
std::vector<SimpleHandler*> returnHandlers;
std::vector<SimpleHandler*> callHandlers;
#endif
bool consumeClockEnabled;
void* arg;
} CB;
bool requestBreakFlag;
#ifndef Z80_DISABLE_BREAKPOINT
inline void checkBreakPoint()
{
auto it = CB.breakPoints.find(reg.PC);
if (it == CB.breakPoints.end()) return;
for (auto bp : *CB.breakPoints[reg.PC]) {
bp->callback(CB.arg);
}
}
inline void readFullOpcode(BreakOperand* operand, unsigned char* opcode, int* opcodeLength)
{
*opcodeLength = 0;
switch (operand->prefixNumber) {
case 0x00:
opcode[0] = operand->operandNumber;
*opcodeLength = opLength1[opcode[0]];
for (int i = 1; i < *opcodeLength; i++) {
opcode[i] = readByte(reg.PC + i - 1, 0); // read without consume clocks
}
break;
case 0xCB:
opcode[0] = 0xCB;
opcode[1] = operand->operandNumber;
*opcodeLength = 2;
break;
case 0xED:
opcode[0] = 0xED;
opcode[1] = operand->operandNumber;
*opcodeLength = opLengthED[opcode[1]];
for (int i = 2; i < *opcodeLength; i++) {
opcode[i] = readByte(reg.PC + i - 2, 0); // read without consume clocks
}
break;
case 0xDD:
opcode[0] = 0xDD;
opcode[1] = operand->operandNumber;
*opcodeLength = opLengthIXY[opcode[1]];
for (int i = 2; i < *opcodeLength; i++) {
opcode[i] = readByte(reg.PC + i - 2, 0); // read without consume clocks
}
break;
case 0xFD:
opcode[0] = 0xFD;
opcode[1] = operand->operandNumber;
*opcodeLength = opLengthIXY[opcode[1]];
for (int i = 2; i < *opcodeLength; i++) {
opcode[i] = readByte(reg.PC + i - 2, 0); // read without consume clocks
}
break;
case 0xDDCB:
opcode[0] = 0xDD;
opcode[1] = 0xCB;
opcode[2] = operand->operandNumber;
opcode[3] = readByte(reg.PC, 0);
*opcodeLength = 4;
break;
case 0xFDCB:
opcode[0] = 0xFD;
opcode[1] = 0xCB;
opcode[2] = operand->operandNumber;
opcode[3] = readByte(reg.PC, 0);
*opcodeLength = 4;
break;
}
}
inline void checkBreakOperand(int operandNumber)
{
if (CB.breakOperands.empty()) return;
auto it = CB.breakOperands.find(operandNumber);
if (it == CB.breakOperands.end()) return;
unsigned char opcode[16];
int opcodeLength = 16;
bool first = true;
for (auto bo : *CB.breakOperands[operandNumber]) {
if (first) {
readFullOpcode(bo, opcode, &opcodeLength);
first = false;
}
bo->callback(CB.arg, opcode, opcodeLength);
}
}
inline void checkBreakOperandCB(unsigned char operandNumber) { checkBreakOperand(0xCB00 | operandNumber); }
inline void checkBreakOperandED(unsigned char operandNumber) { checkBreakOperand(0xED00 | operandNumber); }
inline void checkBreakOperandIX(unsigned char operandNumber) { checkBreakOperand(0xDD00 | operandNumber); }
inline void checkBreakOperandIY(unsigned char operandNumber) { checkBreakOperand(0xFD00 | operandNumber); }
inline void checkBreakOperandIX4(unsigned char operandNumber) { checkBreakOperand(0xDDCB00 | operandNumber); }
inline void checkBreakOperandIY4(unsigned char operandNumber) { checkBreakOperand(0xFDCB00 | operandNumber); }
#endif
#ifndef Z80_DISABLE_DEBUG
inline void log(const char* format, ...)
{
char buf[1024];
va_list args;
va_start(args, format);
vsnprintf(buf, sizeof(buf), format, args);
va_end(args);
CB.debugMessage(CB.arg, buf);
}
#endif
inline unsigned short getAF()
{
return make16BitsFromLE(reg.pair.F, reg.pair.A);
}
inline unsigned short getAF2() { return make16BitsFromLE(reg.back.F, reg.back.A); }
inline unsigned short getBC() { return make16BitsFromLE(reg.pair.C, reg.pair.B); }
inline unsigned short getBC2() { return make16BitsFromLE(reg.back.C, reg.back.B); }
inline unsigned short getDE() { return make16BitsFromLE(reg.pair.E, reg.pair.D); }
inline unsigned short getDE2() { return make16BitsFromLE(reg.back.E, reg.back.D); }
inline unsigned short getHL() { return make16BitsFromLE(reg.pair.L, reg.pair.H); }
inline unsigned short getHL2() { return make16BitsFromLE(reg.back.L, reg.back.H); }
inline void setAF(unsigned short value) { splitTo8BitsPair(value, ®.pair.A, ®.pair.F); }
inline void setAF2(unsigned short value) { splitTo8BitsPair(value, ®.back.A, ®.back.F); }
inline void setBC(unsigned short value) { splitTo8BitsPair(value, ®.pair.B, ®.pair.C); }
inline void setBC2(unsigned short value) { splitTo8BitsPair(value, ®.back.B, ®.back.C); }
inline void setDE(unsigned short value) { splitTo8BitsPair(value, ®.pair.D, ®.pair.E); }
inline void setDE2(unsigned short value) { splitTo8BitsPair(value, ®.back.D, ®.back.E); }
inline void setHL(unsigned short value) { splitTo8BitsPair(value, ®.pair.H, ®.pair.L); }
inline void setHL2(unsigned short value) { splitTo8BitsPair(value, ®.back.H, ®.back.L); }
inline unsigned short getRP(unsigned char rp)
{
switch (rp & 0b11) {
case 0b00: return getBC();
case 0b01: return getDE();
case 0b10: return getHL();
default: return reg.SP;
}
}
inline unsigned short getRPIX(unsigned char rp)
{
switch (rp & 0b11) {
case 0b00: return getBC();
case 0b01: return getDE();
case 0b10: return reg.IX;
default: return reg.SP;
}
}
inline unsigned short getRPIY(unsigned char rp)
{
switch (rp & 0b11) {
case 0b00: return getBC();
case 0b01: return getDE();
case 0b10: return reg.IY;
default: return reg.SP;
}
}
inline void setRP(unsigned char rp, unsigned short value)
{
switch (rp & 0b11) {
case 0b00: setBC(value); break;
case 0b01: setDE(value); break;
case 0b10: setHL(value); break;
default: reg.SP = value;
}
}
inline unsigned char getIXH() { return (reg.IX & 0xFF00) >> 8; }
inline unsigned char getIXL() { return reg.IX & 0x00FF; }
inline unsigned char getIYH() { return (reg.IY & 0xFF00) >> 8; }
inline unsigned char getIYL() { return reg.IY & 0x00FF; }
inline unsigned char getPCH() { return (reg.PC & 0xFF00) >> 8; }
inline unsigned char getPCL() { return reg.PC & 0x00FF; }
inline void setPCH(unsigned char v) { reg.PC = (reg.PC & 0x00FF) + v * 256; }
inline void setPCL(unsigned char v) { reg.PC = (reg.PC & 0xFF00) + v; }
inline void setSPH(unsigned char v) { reg.SP = (reg.SP & 0x00FF) + v * 256; }
inline void setSPL(unsigned char v) { reg.SP = (reg.SP & 0xFF00) + v; }
inline void setIXH(unsigned char v) { reg.IX = (reg.IX & 0x00FF) + v * 256; }
inline void setIXL(unsigned char v) { reg.IX = (reg.IX & 0xFF00) + v; }
inline void setIYH(unsigned char v) { reg.IY = (reg.IY & 0x00FF) + v * 256; }
inline void setIYL(unsigned char v) { reg.IY = (reg.IY & 0xFF00) + v; }
inline bool isEvenNumberBits(unsigned char value)
{
int on = 0;
int off = 0;
value & 0b10000000 ? on++ : off++;
value & 0b01000000 ? on++ : off++;
value & 0b00100000 ? on++ : off++;
value & 0b00010000 ? on++ : off++;
value & 0b00001000 ? on++ : off++;
value & 0b00000100 ? on++ : off++;
value & 0b00000010 ? on++ : off++;
value & 0b00000001 ? on++ : off++;
return (on & 1) == 0;
}
inline void consumeClock(int hz)
{
reg.consumeClockCounter += hz;
#ifndef Z80_CALLBACK_PER_INSTRUCTION
#ifdef Z80_CALLBACK_WITHOUT_CHECK
CB.consumeClock(CB.arg, hz);
#else
if (CB.consumeClockEnabled && hz) CB.consumeClock(CB.arg, hz);
#endif
#endif
}
inline unsigned short getPort16WithB(unsigned char c) { return make16BitsFromLE(c, reg.pair.B); }
inline unsigned short getPort16WithA(unsigned char c) { return make16BitsFromLE(c, reg.pair.A); }
inline unsigned char inPortWithB(unsigned char port, int clock = 4)
{
#ifdef Z80_UNSUPPORT_16BIT_PORT
unsigned char byte = CB.in(CB.arg, port);
#else
unsigned char byte = CB.in(CB.arg, CB.returnPortAs16Bits ? getPort16WithB(port) : port);
#endif
consumeClock(clock);
return byte;
}
inline unsigned char inPortWithA(unsigned char port, int clock = 4)
{
#ifdef Z80_UNSUPPORT_16BIT_PORT
unsigned char byte = CB.in(CB.arg, port);
#else
unsigned char byte = CB.in(CB.arg, CB.returnPortAs16Bits ? getPort16WithA(port) : port);
#endif
consumeClock(clock);
return byte;
}
inline void outPortWithB(unsigned char port, unsigned char value, int clock = 4)
{
#ifdef Z80_UNSUPPORT_16BIT_PORT
CB.out(CB.arg, port, value);
#else
CB.out(CB.arg, CB.returnPortAs16Bits ? getPort16WithB(port) : port, value);
#endif
consumeClock(clock);
}
inline void outPortWithA(unsigned char port, unsigned char value, int clock = 4)
{
#ifdef Z80_UNSUPPORT_16BIT_PORT
CB.out(CB.arg, port, value);
#else
CB.out(CB.arg, CB.returnPortAs16Bits ? getPort16WithA(port) : port, value);
#endif
consumeClock(clock);
}
static inline void NOP(Z80* ctx)
{
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] NOP", ctx->reg.PC - 1);
#endif
}
static inline void HALT(Z80* ctx)
{
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] HALT", ctx->reg.PC - 1);
#endif
ctx->reg.IFF |= ctx->IFF_HALT();
}
static inline void DI(Z80* ctx)
{
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] DI", ctx->reg.PC - 1);
#endif
ctx->reg.IFF &= ~(ctx->IFF1() | ctx->IFF2());
}
static inline void EI(Z80* ctx)
{
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] EI", ctx->reg.PC - 1);
#endif
ctx->reg.IFF |= ctx->IFF1() | ctx->IFF2();
ctx->reg.execEI = 1;
}
static inline void IM0(Z80* ctx) { ctx->IM(0); }
static inline void IM1(Z80* ctx) { ctx->IM(1); }
static inline void IM2(Z80* ctx) { ctx->IM(2); }
inline void IM(unsigned char interrptMode)
{
#ifndef Z80_DISABLE_DEBUG
if (isDebug()) log("[%04X] IM %d", reg.PC - 2, interrptMode);
#endif
reg.interrupt &= 0b11111100;
reg.interrupt |= interrptMode & 0b11;
}
static inline void LD_A_I_(Z80* ctx) { ctx->LD_A_I(); }
inline void LD_A_I()
{
#ifndef Z80_DISABLE_DEBUG
if (isDebug()) log("[%04X] LD A<$%02X>, I<$%02X>", reg.PC - 2, reg.pair.A, reg.I);
#endif
reg.pair.A = reg.I;
setFlagPV(reg.IFF & IFF2());
consumeClock(1);
}
static inline void LD_I_A_(Z80* ctx) { ctx->LD_I_A(); }
inline void LD_I_A()
{
#ifndef Z80_DISABLE_DEBUG
if (isDebug()) log("[%04X] LD I<$%02X>, A<$%02X>", reg.PC - 2, reg.I, reg.pair.A);
#endif
reg.I = reg.pair.A;
consumeClock(1);
}
static inline void LD_A_R_(Z80* ctx) { ctx->LD_A_R(); }
inline void LD_A_R()
{
#ifndef Z80_DISABLE_DEBUG
if (isDebug()) log("[%04X] LD A<$%02X>, R<$%02X>", reg.PC - 2, reg.pair.A, reg.R);
#endif
reg.pair.A = reg.R;
setFlagPV(reg.IFF & IFF1());
consumeClock(1);
}
static inline void LD_R_A_(Z80* ctx) { ctx->LD_R_A(); }
inline void LD_R_A()
{
#ifndef Z80_DISABLE_DEBUG
if (isDebug()) log("[%04X] LD R<$%02X>, A<$%02X>", reg.PC - 2, reg.R, reg.pair.A);
#endif
reg.R = reg.pair.A;
consumeClock(1);
}
static inline void OP_CB(Z80* ctx)
{
unsigned char operandNumber = ctx->fetch(4 + ctx->wtc.fetchM);
#ifndef Z80_DISABLE_BREAKPOINT
ctx->checkBreakOperandCB(operandNumber);
#endif
ctx->opSetCB[operandNumber](ctx);
}
static inline void OP_ED(Z80* ctx)
{
unsigned char operandNumber = ctx->fetch(4 + ctx->wtc.fetchM);
#ifndef Z80_NO_EXCEPTION
if (!ctx->opSetED[operandNumber]) {
char buf[80];
snprintf(buf, sizeof(buf), "detect an unknown operand (ED,%02X)", operandNumber);
throw std::runtime_error(buf);
}
#endif
#ifndef Z80_DISABLE_BREAKPOINT
ctx->checkBreakOperandED(operandNumber);
#endif
ctx->opSetED[operandNumber](ctx);
}
static inline void OP_IX(Z80* ctx)
{
unsigned char operandNumber = ctx->fetch(4 + ctx->wtc.fetchM);
#ifndef Z80_NO_EXCEPTION
if (!ctx->opSetIX[operandNumber]) {
char buf[80];
snprintf(buf, sizeof(buf), "detect an unknown operand (DD,%02X)", operandNumber);
throw std::runtime_error(buf);
}
#endif
#ifndef Z80_DISABLE_BREAKPOINT
ctx->checkBreakOperandIX(operandNumber);
#endif
ctx->opSetIX[operandNumber](ctx);
}
static inline void OP_IY(Z80* ctx)
{
unsigned char operandNumber = ctx->fetch(4 + ctx->wtc.fetchM);
#ifndef Z80_NO_EXCEPTION
if (!ctx->opSetIY[operandNumber]) {
char buf[80];
snprintf(buf, sizeof(buf), "detect an unknown operand (FD,%02X)", operandNumber);
throw std::runtime_error(buf);
}
#endif
#ifndef Z80_DISABLE_BREAKPOINT
ctx->checkBreakOperandIY(operandNumber);
#endif
ctx->opSetIY[operandNumber](ctx);
}
static inline void OP_IX4(Z80* ctx)
{
signed char op3 = (signed char)ctx->fetch(4);
unsigned char op4 = ctx->fetch(4);
#ifndef Z80_DISABLE_BREAKPOINT
ctx->checkBreakOperandIX4(op4);
#endif
ctx->opSetIX4[op4](ctx, op3);
}
static inline void OP_IY4(Z80* ctx)
{
signed char op3 = (signed char)ctx->fetch(4);
unsigned char op4 = ctx->fetch(4);
#ifndef Z80_DISABLE_BREAKPOINT
ctx->checkBreakOperandIY4(op4);
#endif
ctx->opSetIY4[op4](ctx, op3);
}
// Load location (HL) with value n
static inline void LD_HL_N(Z80* ctx)
{
unsigned char n = ctx->fetch(3);
unsigned short hl = ctx->getHL();
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] LD (HL<$%04X>), $%02X", ctx->reg.PC - 2, hl, n);
#endif
ctx->writeByte(hl, n, 3);
}
// Load Acc. wth location (BC)
static inline void LD_A_BC(Z80* ctx)
{
unsigned short addr = ctx->getBC();
unsigned char n = ctx->readByte(addr, 3);
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] LD A, (BC<$%02X%02X>) = $%02X", ctx->reg.PC - 1, ctx->reg.pair.B, ctx->reg.pair.C, n);
#endif
ctx->reg.pair.A = n;
}
// Load Acc. wth location (DE)
static inline void LD_A_DE(Z80* ctx)
{
unsigned short addr = ctx->getDE();
unsigned char n = ctx->readByte(addr, 3);
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] LD A, (DE<$%02X%02X>) = $%02X", ctx->reg.PC - 1, ctx->reg.pair.D, ctx->reg.pair.E, n);
#endif
ctx->reg.pair.A = n;
}
// Load Acc. wth location (nn)
static inline void LD_A_NN(Z80* ctx)
{
unsigned char l = ctx->fetch(3);
unsigned char h = ctx->fetch(3);
unsigned short addr = ctx->make16BitsFromLE(l, h);
unsigned char n = ctx->readByte(addr, 3);
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] LD A, ($%04X) = $%02X", ctx->reg.PC - 3, addr, n);
#endif
ctx->reg.pair.A = n;
}
// Load location (BC) wtih Acc.
static inline void LD_BC_A(Z80* ctx)
{
unsigned short addr = ctx->getBC();
unsigned char n = ctx->reg.pair.A;
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] LD (BC<$%02X%02X>), A<$%02X>", ctx->reg.PC - 1, ctx->reg.pair.B, ctx->reg.pair.C, n);
#endif
ctx->writeByte(addr, n, 3);
}
// Load location (DE) wtih Acc.
static inline void LD_DE_A(Z80* ctx)
{
unsigned short addr = ctx->getDE();
unsigned char n = ctx->reg.pair.A;
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] LD (DE<$%02X%02X>), A<$%02X>", ctx->reg.PC - 1, ctx->reg.pair.D, ctx->reg.pair.E, n);
#endif
ctx->writeByte(addr, n, 3);
}
// Load location (nn) with Acc.
static inline void LD_NN_A(Z80* ctx)
{
unsigned char l = ctx->fetch(3);
unsigned char h = ctx->fetch(3);
unsigned short addr = ctx->make16BitsFromLE(l, h);
unsigned char n = ctx->reg.pair.A;
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] LD ($%04X), A<$%02X>", ctx->reg.PC - 3, addr, n);
#endif
ctx->writeByte(addr, n, 3);
}
// Load HL with location (nn).
static inline void LD_HL_ADDR(Z80* ctx)
{
unsigned char l = ctx->fetch(3);
unsigned char h = ctx->fetch(3);
unsigned short addr = ctx->make16BitsFromLE(l, h);
#ifndef Z80_DISABLE_DEBUG
unsigned short hl = ctx->getHL();
#endif
ctx->reg.pair.L = ctx->readByte(addr, 3);
ctx->reg.pair.H = ctx->readByte(addr + 1, 3);
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] LD HL<$%04X>, ($%04X) = $%04X", ctx->reg.PC - 3, hl, addr, ctx->getHL());
#endif
}
// Load location (nn) with HL.
static inline void LD_ADDR_HL(Z80* ctx)
{
unsigned char l = ctx->fetch(3);
unsigned char h = ctx->fetch(3);
unsigned short addr = ctx->make16BitsFromLE(l, h);
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] LD ($%04X), %s", ctx->reg.PC - 3, addr, ctx->registerPairDump(0b10));
#endif
ctx->writeByte(addr, ctx->reg.pair.L, 3);
ctx->writeByte(addr + 1, ctx->reg.pair.H, 3);
}
// Load SP with HL.
static inline void LD_SP_HL(Z80* ctx)
{
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] LD %s, HL<$%04X>", ctx->reg.PC - 1, ctx->registerPairDump(0b11), ctx->getHL());
#endif
ctx->reg.SP = ctx->getHL();
ctx->consumeClock(2);
}
// Exchange H and L with D and E
static inline void EX_DE_HL(Z80* ctx)
{
unsigned short de = ctx->getDE();
unsigned short hl = ctx->getHL();
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] EX %s, %s", ctx->reg.PC - 1, ctx->registerPairDump(0b01), ctx->registerPairDump(0b10));
#endif
ctx->setDE(hl);
ctx->setHL(de);
}
// Exchange A and F with A' and F'
static inline void EX_AF_AF2(Z80* ctx)
{
unsigned short af = ctx->getAF();
unsigned short af2 = ctx->getAF2();
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] EX AF<$%02X%02X>, AF'<$%02X%02X>", ctx->reg.PC - 1, ctx->reg.pair.A, ctx->reg.pair.F, ctx->reg.back.A, ctx->reg.back.F);
#endif
ctx->setAF(af2);
ctx->setAF2(af);
}
static inline void EX_SP_HL(Z80* ctx)
{
#ifndef Z80_DISABLE_DEBUG
unsigned short sp = ctx->reg.SP;
#endif
unsigned char l = ctx->pop(4);
unsigned char h = ctx->pop(4);
#ifndef Z80_DISABLE_DEBUG
unsigned short hl = ctx->getHL();
if (ctx->isDebug()) ctx->log("[%04X] EX (SP<$%04X>) = $%02X%02X, HL<$%04X>", ctx->reg.PC - 1, sp, h, l, hl);
#endif
ctx->push(ctx->reg.pair.H, 4);
ctx->reg.pair.H = h;
ctx->push(ctx->reg.pair.L, 3);
ctx->reg.pair.L = l;
}
static inline void EXX(Z80* ctx)
{
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] EXX", ctx->reg.PC - 1);
#endif
unsigned short bc = ctx->getBC();
unsigned short bc2 = ctx->getBC2();
unsigned short de = ctx->getDE();
unsigned short de2 = ctx->getDE2();
unsigned short hl = ctx->getHL();
unsigned short hl2 = ctx->getHL2();
ctx->setBC(bc2);
ctx->setBC2(bc);
ctx->setDE(de2);
ctx->setDE2(de);
ctx->setHL(hl2);
ctx->setHL2(hl);
}
inline void push(unsigned char value, int clocks)
{
reg.SP--;
writeByte(reg.SP, value, clocks);
}
inline unsigned char pop(int clocks)
{
unsigned char value = readByte(reg.SP, clocks);
reg.SP++;
return value;
}
static inline void PUSH_AF(Z80* ctx)
{
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] PUSH AF<$%02X%02X> <SP:$%04X>", ctx->reg.PC - 1, ctx->reg.pair.A, ctx->reg.pair.F, ctx->reg.SP);
#endif
ctx->push(ctx->reg.pair.A, 4);
ctx->push(ctx->reg.pair.F, 3);
}
static inline void POP_AF(Z80* ctx)
{
ctx->reg.pair.F = ctx->pop(3);
ctx->reg.pair.A = ctx->pop(3);
#ifndef Z80_DISABLE_DEBUG
if (ctx->isDebug()) ctx->log("[%04X] POP AF <SP:$%04X> = $%04X", ctx->reg.PC - 1, ctx->reg.SP - 2, ctx->getAF());
#endif
}
unsigned char* registerPointerTable[8] = {®.pair.B, ®.pair.C, ®.pair.D, ®.pair.E, ®.pair.H, ®.pair.L, ®.pair.F, ®.pair.A};
inline unsigned char* getRegisterPointer(unsigned char r) { return registerPointerTable[r]; }
inline unsigned char getRegister(unsigned char r) { return *registerPointerTable[r]; }
#ifndef Z80_DISABLE_DEBUG
inline char* registerDump(unsigned char r)
{
static char A[16];
static char B[16];
static char C[16];
static char D[16];
static char E[16];
static char H[16];
static char L[16];
static char F[16];
static char unknown[2];
switch (r & 0b111) {
case 0b111: snprintf(A, sizeof(A), "A<$%02X>", reg.pair.A); return A;
case 0b000: snprintf(B, sizeof(B), "B<$%02X>", reg.pair.B); return B;
case 0b001: snprintf(C, sizeof(C), "C<$%02X>", reg.pair.C); return C;
case 0b010: snprintf(D, sizeof(D), "D<$%02X>", reg.pair.D); return D;
case 0b011: snprintf(E, sizeof(E), "E<$%02X>", reg.pair.E); return E;
case 0b100: snprintf(H, sizeof(H), "H<$%02X>", reg.pair.H); return H;
case 0b101: snprintf(L, sizeof(L), "L<$%02X>", reg.pair.L); return L;
case 0b110: snprintf(F, sizeof(F), "F<$%02X>", reg.pair.F); return F;
}
unknown[0] = '?';
unknown[1] = '\0';
return unknown;
}
inline char* conditionDump(Condition c)
{
static char CN[4];
switch (c) {
case Condition::NZ: strcpy(CN, "NZ"); break;
case Condition::Z: strcpy(CN, "Z"); break;
case Condition::NC: strcpy(CN, "NC"); break;
case Condition::C: strcpy(CN, "C"); break;
case Condition::NPV: strcpy(CN, "PO"); break;
case Condition::PV: strcpy(CN, "PE"); break;
case Condition::NS: strcpy(CN, "P"); break;
case Condition::S: strcpy(CN, "M"); break;
}
return CN;
}
inline char* relativeDump(unsigned short pc, signed char e)
{
static char buf[80];
if (e < 0) {
int ee = -e;
ee -= 2;
snprintf(buf, sizeof(buf), "$%04X - %d = $%04X", pc, ee, pc + e + 2);
} else {
snprintf(buf, sizeof(buf), "$%04X + %d = $%04X", pc, e + 2, pc + e + 2);
}
return buf;
}
inline char* registerDump2(unsigned char r)
{
static char A[16];
static char B[16];
static char C[16];
static char D[16];
static char E[16];
static char H[16];
static char L[16];
static char unknown[2] = "?";
switch (r) {
case 0b111: snprintf(A, sizeof(A), "A'<$%02X>", reg.back.A); return A;
case 0b000: snprintf(B, sizeof(B), "B'<$%02X>", reg.back.B); return B;
case 0b001: snprintf(C, sizeof(C), "C'<$%02X>", reg.back.C); return C;