public static void Lop3(EmitterContext context)
{
IOpCodeLop op = (IOpCodeLop)context.CurrOp;
Operand srcA = GetSrcA(context);
Operand srcB = GetSrcB(context);
Operand srcC = GetSrcC(context);
bool regVariant = op is OpCodeLopReg;
int truthTable = regVariant
? op.RawOpCode.Extract(28, 8)
: op.RawOpCode.Extract(48, 8);
Operand res = Lop3Expression.GetFromTruthTable(context, srcA, srcB, srcC, truthTable);
if (regVariant)
{
EmitLopPredWrite(context, op, res, (ConditionalOperation)context.CurrOp.RawOpCode.Extract(36, 2));
}
Operand dest = GetDest(context);
context.Copy(dest, res);
SetZnFlags(context, dest, op.SetCondCode, op.Extended);
}
private static void EmitLopPredWrite(EmitterContext context, IOpCodeLop op, Operand result, ConditionalOperation condOp)
{
if (op is OpCodeLop opLop && !opLop.Predicate48.IsPT)
{
Operand pRes;
if (condOp == ConditionalOperation.False)
{
pRes = Const(IrConsts.False);
}
else if (condOp == ConditionalOperation.True)
{
pRes = Const(IrConsts.True);
}
else if (condOp == ConditionalOperation.Zero)
{
pRes = context.ICompareEqual(result, Const(0));
}
else /* if (opLop.CondOp == ConditionalOperation.NotZero) */
{
pRes = context.ICompareNotEqual(result, Const(0));
}
context.Copy(Register(opLop.Predicate48), pRes);
}
}
public static void Lop(EmitterContext context)
{
IOpCodeLop op = (IOpCodeLop)context.CurrOp;
Operand srcA = context.BitwiseNot(GetSrcA(context), op.InvertA);
Operand srcB = context.BitwiseNot(GetSrcB(context), op.InvertB);
Operand res = srcB;
switch (op.LogicalOp)
{
case LogicalOperation.And: res = context.BitwiseAnd(srcA, srcB); break;
case LogicalOperation.Or: res = context.BitwiseOr(srcA, srcB); break;
case LogicalOperation.ExclusiveOr: res = context.BitwiseExclusiveOr(srcA, srcB); break;
}
EmitLopPredWrite(context, op, res, (ConditionalOperation)context.CurrOp.RawOpCode.Extract(44, 2));
Operand dest = GetDest(context);
context.Copy(dest, res);
SetZnFlags(context, dest, op.SetCondCode, op.Extended);
}
