;; We need to copy from downwards up to avoid overwriting some of
;; the yet uncopied args. So we need to use R9 as the copy index
;; and RCX as the loop counter, rather than using RCX for both.
;; We need to copy from downwards up to avoid overwriting some of
;; the yet uncopied args. So we need to use R9 as the copy index
;; and RCX as the loop counter, rather than using RCX for both.