(let ((delta (logandc2 (+ amount 3) 3)))
(inst add esp-tn delta)))
(when (policy node (= sb!c::float-accuracy 3))
+ (inst fnstcw (make-ea :word :base esp-tn))
+ (inst wait)
(inst and (make-ea :word :base esp-tn) #xfeff)
(inst fldcw (make-ea :word :base esp-tn))
(inst wait)