+
+;;; (not really a bit-bashing routine, but starting to take over from
+;;; bit-bashing routines in byte-sized copies as of sbcl-0.6.12.29:)
+(defknown %byte-blt
+ ((or (simple-unboxed-array (*)) system-area-pointer) index
+ (or (simple-unboxed-array (*)) system-area-pointer) index index)
+ null
+ ())