private static void EmitLopPredWrite(EmitterContext context, Operand result, PredicateOp predOp, int pred)
{
if (pred != RegisterConsts.PredicateTrueIndex)
{
Operand pRes;
if (predOp == PredicateOp.F)
{
pRes = Const(IrConsts.False);
}
else if (predOp == PredicateOp.T)
{
pRes = Const(IrConsts.True);
}
else if (predOp == PredicateOp.Z)
{
pRes = context.ICompareEqual(result, Const(0));
}
else /* if (predOp == Pop.Nz) */
{
pRes = context.ICompareNotEqual(result, Const(0));
}
context.Copy(Register(pred, RegisterType.Predicate), pRes);
}
}
private static void EmitLop(
EmitterContext context,
LogicOp logicOp,
PredicateOp predOp,
Operand srcA,
Operand srcB,
int rd,
int destPred,
bool invertA,
bool invertB,
bool extended,
bool writeCC)
{
srcA = context.BitwiseNot(srcA, invertA);
srcB = context.BitwiseNot(srcB, invertB);
Operand res = logicOp switch
{
LogicOp.And => res = context.BitwiseAnd(srcA, srcB),
LogicOp.Or => res = context.BitwiseOr(srcA, srcB),
LogicOp.Xor => res = context.BitwiseExclusiveOr(srcA, srcB),
_ => srcB
};
EmitLopPredWrite(context, res, predOp, destPred);
context.Copy(GetDest(rd), res);
SetZnFlags(context, res, writeCC, extended);
}
private static void EmitLop3(
EmitterContext context,
int truthTable,
PredicateOp predOp,
Operand srcA,
Operand srcB,
Operand srcC,
int rd,
int destPred,
bool extended,
bool writeCC)
{
Operand res = Lop3Expression.GetFromTruthTable(context, srcA, srcB, srcC, truthTable);
EmitLopPredWrite(context, res, predOp, destPred);
context.Copy(GetDest(rd), res);
SetZnFlags(context, res, writeCC, extended);
}