- fx+ N1 N2procedure
- fx- N1 N2procedure
- fx* N1 N2procedure
- fx/ N1 N2procedure
- fxmod N1 N2procedure
- fxneg Nprocedure
- fxmin N1 N2procedure
- fxmax N1 N2procedure
- fxand N1 N2procedure
- fxior N1 N2procedure
- fxxor N1 N2procedure
- fxnot Nprocedure
- fxshl N1 N2procedure
- fxshr N1 N2procedure
fx+ and friends are arithmetic fixnum operations. These procedures do not check their arguments, so non-fixnum parameters will result in incorrect results. fxneg negates its argument.
On division by zero, fx/ and fxmod signal a condition of kind (exn arithmetic).
fxshl and fxshr perform arithmetic shift left and right, respectively.