コード例 #1
0
 public int Cast(long a)
 {
     if (a < int.MinValue || a > int.MaxValue)
     {
         MathOperationError.Overflow();
     }
     return((int)a);
 }
コード例 #2
0
        public Vector <long> Add(Vector <long> lhs, Vector <int> rhs)
        {
            // Adapted from Hacker's Delight p26, where both inputs need to be of the same sign, and that sign is different from result
            // (i.e. xors for diff, and for both, less and zero for checking sign bit set)
            Vector.Widen(rhs, out var rhs1, out var rhs2);

            var partialResult      = Vector.Add(lhs, rhs1);
            var partialResultCheck = Vector.BitwiseAnd(Vector.Xor(partialResult, lhs), Vector.Xor(partialResult, rhs1));

            var finalResult      = Vector.Add(partialResult, rhs2);
            var finalResultCheck = Vector.BitwiseAnd(Vector.Xor(finalResult, partialResult), Vector.Xor(finalResult, rhs2));

            if (Vector.LessThanAny(Vector.BitwiseOr(partialResultCheck, finalResultCheck), Vector <long> .Zero))
            {
                MathOperationError.Overflow();
            }

            return(finalResult);
        }