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Allegro CL
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  ANSI Common Lisp   12 Numbers   12.2 Dictionary of Numbers

12.2.61 boole-1, boole-2, boole-and, boole-andc1, boole-andc2, boole-c1, boole-c2, boole-clr, boole-eqv, boole-ior, boole-nand, boole-nor, boole-orc1, boole-orc2, boole-set, boole-xor Constant Variable

Constant Value:
The identity and nature of the values of each of these variables is implementation-dependent, except that it must be distinct from each of the values of the others, and it must be a valid first argument to the function boole.

Each of these constants has a value which is one of the sixteen possible bit-wise logical operation specifiers.

 (boole boole-ior 1 16)  17
 (boole boole-and -2 5)  4
 (boole boole-eqv 17 15)  -31

See Also:

Allegro CL Implementation Details:

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