public void UnsignedIntegerOverflow()
{
Debug.Assert(IntegerTwiddling.IsAddOverflow(ulong.MaxValue, 1ul));
Debug.Assert(!IntegerTwiddling.IsAddOverflow(ulong.MaxValue, 0ul));
Debug.Assert(!IntegerTwiddling.IsAddOverflow(0ul, 0ul));
Debug.Assert(!IntegerTwiddling.IsAddOverflow(0ul, ulong.MaxValue));
}
public override void Transform(Context context, TransformContext transformContext)
{
var result = context.Result;
var result2 = context.Result2;
var t1 = context.Operand1.ConstantUnsigned64;
var t2 = context.Operand2.ConstantUnsigned64;
var e1 = transformContext.CreateConstant(t1 + t2);
var carry = IntegerTwiddling.IsAddOverflow(t1, t2);
context.SetInstruction(IRInstruction.Move64, result, e1);
context.AppendInstruction(IRInstruction.Move64, result2, carry ? transformContext.CreateConstant(1) : transformContext.ConstantZero64);
}
public void SignedIntegerOverflow()
{
Debug.Assert(IntegerTwiddling.IsAddOverflow(2147483640, 10));
Debug.Assert(!IntegerTwiddling.IsAddOverflow(0, 0));
}