;;;; bit, 2-bit, and 4-bit vectors
(macrolet ((def-small-data-vector-frobs (type bits)
- (let* ((elements-per-word (floor sb!vm:word-bits bits))
+ (let* ((elements-per-word (floor sb!vm:n-word-bits bits))
(bit-shift (1- (integer-length elements-per-word))))
`(progn
(define-vop (,(symbolicate 'data-vector-ref/ type))