protected int RoxlWordMem(int opcode)
{
IOperand op = cpu.ResolveDstEA((opcode >> 3) & 0x07, (opcode & 0x07), Size.Word);
int v = op.GetWord();
int last_out = v & 0x8000;
v <<= 1;
if (cpu.IsFlagSet(cpu.XFlag))
{
v |= 0x01;
}
op.SetWord(v);
int maskFlags;
if (last_out != 0)
{
maskFlags = cpu.XFlag + cpu.CFlag;
}
else
{
maskFlags = 0;
}
if ((v & 0xffff) == 0)
{
maskFlags += cpu.ZFlag;
}
if ((v & 0x8000) != 0)
{
maskFlags += cpu.NFlag;
}
cpu.SetCCRegister(maskFlags);
return(8 + op.GetTiming());
}
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 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 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 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 MoveWord(int opcode)
{
IOperand src = cpu.ResolveSrcEA((opcode >> 3) & 0x07, opcode & 0x07, Size.Word);
IOperand dst = cpu.ResolveDstEA((opcode >> 6) & 0x07, (opcode >> 9) & 0x07, Size.Word);
int s = src.GetWord();
dst.SetWord(s);
cpu.CalcFlags(InstructionType.MOVE, s, s, s, Size.Word);
return(ShortExecutionTime[src.Index()][dst.Index()]);
}
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 SubiWord(int opcode)
{
int s = cpu.FetchPCWordSigned();
IOperand dst = cpu.ResolveDstEA((opcode >> 3) & 0x07, 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() ? 8 : 12 + dst.GetTiming());
}
protected int LslWordMem(int opcode)
{
IOperand op = cpu.ResolveDstEA((opcode >> 3) & 0x07, (opcode & 0x07), Size.Word);
int v = op.GetWord();
int last_out = v & 0x8000;
v <<= 1;
op.SetWord(v);
cpu.CalcFlags(InstructionType.LSL, 1, last_out, v, Size.Word);
return(8 + op.GetTiming());
}
protected int SubWordEaDest(int opcode)
{
int s = cpu.GetDataRegisterWordSigned((opcode >> 9) & 0x07);
IOperand dst = cpu.ResolveDstEA((opcode >> 3) & 0x07, opcode & 0x07, Size.Word);
int d = dst.GetWordSigned();
int r = d - s;
dst.SetWord(r);
int time = 8 + dst.GetTiming();
cpu.CalcFlags(InstructionType.SUB, s, d, r, Size.Word);
return(time);
}
protected int AsrWordMem(int opcode)
{
IOperand op = cpu.ResolveDstEA((opcode >> 3) & 0x07, (opcode & 0x07), Size.Word);
int v = op.GetWord();
int last_out = v & 0x01;
int msb = v & 0x8000;
v = (int)((uint)v >> 1);
v |= msb;
op.SetWord(v);
cpu.CalcFlags(InstructionType.ASR, 1, last_out, v, Size.Word);
return(8 + op.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 AslWordMem(int opcode)
{
IOperand op = cpu.ResolveDstEA((opcode >> 3) & 0x07, (opcode & 0x07), Size.Word);
int v = op.GetWord();
int last_out = v & 0x8000;
int msb_changed = 0;
v <<= 1;
if ((v & 0x8000) != last_out)
{
msb_changed = 1;
}
op.SetWord(v);
cpu.CalcFlagsParam(InstructionType.ASL, 1, last_out, v, msb_changed, Size.Word);
return(8 + op.GetTiming());
}