| (plus:m x y) | Represents the sum of the values x and y carried out in machine mode m. |
| (mult:m x y) | Represents the signed product of x and y in machine mode m. |
| (sign_extend:m x) | Represents the result of sign extend the value x to machine mode m. Mode m must be an integer mode and x must have an integer mode narrower than mode m. |