logtest integer-1 integer-2 → generalized-boolean

integer-1 — an integer.

integer-2 — an integer.

generalized-boolean — a generalized boolean.

Returns true if any of the bits designated by the 1’s in integer-1 is 1 in integer-2; otherwise it is false. integer-1 and integer-2 are treated as if they were binary.

Negative integer-1 and integer-2 are treated as if they were represented in two’s-complement binary.

(logtest 1 7) → true 
(logtest 1 2) → false 
(logtest -2 -1) → true 
(logtest 0 -1) → false

Should signal an error of type type-error if integer-1 is not an integer. Should signal an error of type type-error if integer-2 is not an integer.

(logtest x y) ≡ (not (zerop (logand x y)))