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Function LOGTEST

Syntax

  • logtest integer-1 integer-2generalized-boolean

Arguments and Values

Description

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.

Examples

(logtest 1 7)

true

(logtest 1 2)

false

(logtest -2 -1)

true

(logtest 0 -1)

false

Side Effects

None.

Affected By

None.

Exceptional Situations

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.

See Also

None.

Notes

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