Scieneer Common Lisp 1.3.9 online documentation

bit-not bit-array &optional result-bit-array[Function]

Performs a bit-wise logical not on the elements of bit-array, putting the results in result-bit-array. If result-bit-array is t, bit-array is used. If result-bit-array is nil or omitted, a new array is created. Both arrays must have the same rank and dimensions.