protected int SubqWord(int opcode)
{
int s = (opcode >> 9 & 0x07);
if (s == 0)
{
s = 8;
}
int mode = (opcode >> 3) & 0x07;
if (mode != 1)
{
IOperand dst = cpu.ResolveDstEA(mode, (opcode & 0x07), Size.Word);
int d = dst.GetWordSigned();
int r = d - s;
dst.SetWord(r);
cpu.CalcFlags(InstructionType.SUB, s, d, r, Size.Word);
return(dst.IsRegisterMode() ? 4 : 8 + dst.GetTiming());
}
else
{
int reg = opcode & 0x07;
cpu.SetAddrRegisterLong(reg, cpu.GetAddrRegisterLong(reg) - s);
return(4);
}
}
protected int Tas(int opcode)
{
lock (lockObject)
{
int mode = (opcode >> 3) & 0x07;
int reg = (opcode & 0x07);
IOperand op = cpu.ResolveSrcEA(mode, reg, Size.Byte);
int v = op.GetByte();
if (v == 0)
{
cpu.SetFlags(cpu.ZFlag);
}
else
{
cpu.ClrFlags(cpu.ZFlag);
}
if ((v & 0x080) != 0)
{
cpu.SetFlags(cpu.NFlag);
}
else
{
cpu.ClrFlags(cpu.NFlag);
}
cpu.ClrFlags(cpu.CFlag | cpu.VFlag);
if (!EmulateBrokenTAS)
{
op.SetByte(v | 0x80);
}
return(op.IsRegisterMode() ? 4 : 14 + op.GetTiming());
}
}
protected int EoriWord(int opcode)
{
int s = cpu.FetchPCWord();
IOperand dst = cpu.ResolveDstEA((opcode >> 3) & 0x07, opcode & 0x07, Size.Word);
int d = dst.GetWord();
int r = s ^ d;
if (dst.IsSR())
{
if (cpu.IsSupervisorMode())
{
cpu.SetSR(r);
}
else
{
cpu.RaiseSRException();
return(34);
}
}
else
{
dst.SetWord(r);
cpu.CalcFlags(InstructionType.EOR, s, d, r, Size.Word);
}
return(dst.IsRegisterMode() ? 8 : 12 + dst.GetTiming());
}
protected int DoMoveFromSr(int opcode)
{
IOperand dst = cpu.ResolveDstEA((opcode >> 3) & 0x07, opcode & 0x07, Size.Word);
dst.GetWord();
dst.SetWord(cpu.GetSR());
return(dst.IsRegisterMode() ? 6 : 8 + dst.GetTiming());
}
protected int NegByte(int opcode)
{
IOperand op = cpu.ResolveDstEA((opcode >> 3) & 0x07, (opcode & 0x07), Size.Byte);
int s = op.GetByte();
int r = 0 - s;
op.SetByte(r);
cpu.CalcFlags(InstructionType.NEG, s, 0, r, Size.Byte);
return(op.IsRegisterMode() ? 4 : 8 + op.GetTiming());
}
protected int NotWord(int opcode)
{
IOperand op = cpu.ResolveDstEA((opcode >> 3) & 0x07, (opcode & 0x07), Size.Word);
int s = op.GetWord();
int r = (~s) & 0xffff;
op.SetWord(r);
cpu.CalcFlags(InstructionType.NOT, s, 0, r, Size.Word);
return(op.IsRegisterMode() ? 4 : 8 + op.GetTiming());
}
protected int Sxx(int opcode)
{
IOperand op = cpu.ResolveDstEA((opcode >> 3) & 0x07, (opcode & 0x07), Size.Byte);
int cc = (opcode >> 8) & 0x0f;
int time;
if (cpu.TestCC(cc))
{
op.SetByte(0xff);
time = (op.IsRegisterMode() ? 6 : 8 + op.GetTiming());
}
else
{
op.SetByte(0);
time = (op.IsRegisterMode() ? 4 : 8 + op.GetTiming());
}
return(time);
}
protected int NotLong(int opcode)
{
IOperand op = cpu.ResolveDstEA((opcode >> 3) & 0x07, (opcode & 0x07), Size.SizeLong);
int s = op.GetLong();
int r = ~s;
op.SetLong(r);
cpu.CalcFlags(InstructionType.NOT, s, 0, r, Size.SizeLong);
return(op.IsRegisterMode() ? 6 : 12 + op.GetTiming());
}
protected int CmpiWord(int opcode)
{
int s = cpu.FetchPCWordSigned();
IOperand op = cpu.ResolveDstEA((opcode >> 3) & 0x07, (opcode & 0x07), Size.Word);
int d = op.GetWordSigned();
int r = d - s;
cpu.CalcFlags(InstructionType.CMP, s, d, r, Size.Word);
return(op.IsRegisterMode() ? 8 : 8 + op.GetTiming());
}
protected int NegxWord(int opcode)
{
IOperand op = cpu.ResolveDstEA((opcode >> 3) & 0x07, (opcode & 0x07), Size.Word);
int s = op.GetWord();
int r = (0 - (s + (cpu.IsFlagSet(cpu.XFlag) ? 1 : 0)));
op.SetWord(r);
cpu.CalcFlags(InstructionType.NEGX, s, 0, r, Size.Word);
return(op.IsRegisterMode() ? 4 : 8 + op.GetTiming());
}
protected int CmpiLong(int opcode)
{
int s = cpu.FetchPCLong();
IOperand op = cpu.ResolveDstEA((opcode >> 3) & 0x07, (opcode & 0x07), Size.SizeLong);
int d = op.GetLong();
int r = d - s;
cpu.CalcFlags(InstructionType.CMP, s, d, r, Size.SizeLong);
return(op.IsRegisterMode() ? 14 : 12 + op.GetTiming());
}
protected int EorWord(int opcode)
{
int s = cpu.GetDataRegisterWord((opcode >> 9) & 0x07);
IOperand dst = cpu.ResolveDstEA((opcode >> 3) & 0x07, opcode & 0x07, Size.Word);
int d = dst.GetWord();
int r = s ^ d;
dst.SetWord(r);
cpu.CalcFlags(InstructionType.EOR, s, d, r, Size.Word);
return(dst.IsRegisterMode() ? 4 : 8 + dst.GetTiming());
}
protected int SubiByte(int opcode)
{
int s = CpuUtils.SignExtendByte(cpu.FetchPCWord());
IOperand dst = cpu.ResolveDstEA((opcode >> 3) & 0x07, opcode & 0x07, Size.Byte);
int d = dst.GetByteSigned();
int r = d - s;
dst.SetByte(r);
cpu.CalcFlags(InstructionType.SUB, s, d, r, Size.Byte);
return(dst.IsRegisterMode() ? 8 : 12 + dst.GetTiming());
}
protected int SubiLong(int opcode)
{
int s = cpu.FetchPCLong();
IOperand dst = cpu.ResolveDstEA((opcode >> 3) & 0x07, opcode & 0x07, Size.SizeLong);
int d = dst.GetLong();
int r = d - s;
dst.SetLong(r);
cpu.CalcFlags(InstructionType.SUB, s, d, r, Size.SizeLong);
return(dst.IsRegisterMode() ? 16 : 20 + dst.GetTiming());
}
protected int AddiWord(int opcode)
{
int s = cpu.FetchPCWordSigned();
IOperand dst = cpu.ResolveDstEA((opcode >> 3) & 0x07, opcode & 0x07, Size.Word);
int d = dst.GetWordSigned();
int r = s + d;
dst.SetWord(r);
cpu.CalcFlags(InstructionType.ADD, s, d, r, Size.Word);
return(dst.IsRegisterMode() ? 8 : 12 + dst.GetTiming());
}
protected int ClrWord(int opcode)
{
IOperand op = cpu.ResolveDstEA((opcode >> 3) & 0x07, (opcode & 0x07), Size.Word);
op.GetWord();
op.SetWord(0);
int flags = cpu.GetCCRegister();
flags &= ~(cpu.NFlag | cpu.CFlag | cpu.VFlag);
flags |= cpu.ZFlag;
cpu.SetCCRegister(flags);
return(op.IsRegisterMode() ? 4 : 8 + op.GetTiming());
}
protected int Nbcd(int opcode)
{
int mode = (opcode >> 3) & 0x07;
int reg = (opcode & 0x07);
IOperand op = cpu.ResolveDstEA(mode, reg, Size.Byte);
int s = op.GetByte();
int x = (cpu.IsFlagSet(cpu.XFlag) ? 1 : 0);
int c;
int lo = 10 - (s & 0x0f) - x;
if (lo < 10)
{
c = 1;
}
else
{
lo = 0;
c = 0;
}
int hi = 10 - ((s >> 4) & 0x0f) - c;
if (hi < 10)
{
c = 1;
}
else
{
c = 0;
hi = 0;
}
int result = (hi << 4) + lo;
if (c != 0)
{
cpu.SetFlags(cpu.XFlag | cpu.CFlag);
}
else
{
cpu.ClrFlags(cpu.XFlag | cpu.CFlag);
}
if (result != 0)
{
cpu.ClrFlags(cpu.ZFlag);
}
op.SetByte(result);
return(op.IsRegisterMode() ? 6 : 8);
}
protected int EoriByte(int opcode)
{
int s = cpu.FetchPCWord() & 0x00ff;
IOperand dst = cpu.ResolveDstEA((opcode >> 3) & 0x07, opcode & 0x07, Size.Byte);
int d = dst.GetByte();
int r = s ^ d;
dst.SetByte(r);
if (!dst.IsSR())
{
cpu.CalcFlags(InstructionType.EOR, s, d, r, Size.Byte);
}
return(dst.IsRegisterMode() ? 8 : 12 + dst.GetTiming());
}
protected int SubqByte(int opcode)
{
int s = (opcode >> 9 & 0x07);
if (s == 0)
{
s = 8;
}
IOperand dst = cpu.ResolveDstEA((opcode >> 3) & 0x07, (opcode & 0x07), Size.Byte);
int d = dst.GetByteSigned();
int r = d - s;
dst.SetByte(r);
cpu.CalcFlags(InstructionType.SUB, s, d, r, Size.Byte);
return(dst.IsRegisterMode() ? 4 : 8 + dst.GetTiming());
}
protected int SubqLong(int opcode)
{
int s = (opcode >> 9 & 0x07);
if (s == 0)
{
s = 8;
}
int mode = (opcode >> 3) & 0x07;
IOperand dst = cpu.ResolveDstEA(mode, (opcode & 0x07), Size.SizeLong);
int d = dst.GetLong();
int r = d - s;
dst.SetLong(r);
if (mode != 1)
{
cpu.CalcFlags(InstructionType.SUB, s, d, r, Size.SizeLong);
}
return(dst.IsRegisterMode() ? 8 : 12 + dst.GetTiming());
}