Bind variables to the contiguous low-order bits of word.
Example:
(BIND-WORD-TO-BITS (A B C) I (B-AND A (B-IOR B C)))
The above macro call will bind A, B, and C to the 0th, 1st, and 2nd bit of I, and then evaluate the logical expression under those bindings. The list of bit names is always interpreted from low to high order.