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)))