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4vecarr

Set-4vec

Modify the nth element of the 4vecarr array.

In the execution this is an array write, but the logical definition is just a thin wrapper for update-nth:

Function: update-4vecs$ai

(defun update-4vecs$ai (stobjs::i stobjs::v 4vecarr$a)
  (declare
       (xargs :guard (and (4vecarr$ap 4vecarr$a)
                          (integerp stobjs::i)
                          (<= 0 stobjs::i)
                          (< stobjs::i (4vecs$a-length 4vecarr$a))
                          (4vec-p stobjs::v)
                          (stobjs::typep$ stobjs::v t))))
  (ec-call (update-nth stobjs::i (4vec-fix$inline stobjs::v)
                       4vecarr$a)))